JP3073334B2 - Vehicle drive system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive system for a vehicle, and more particularly to a so-called midship vehicle in which a drive system including an engine is arranged between wheelbases.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 60-85027 and French Patent No. 1,518,295 disclose examples of midship vehicles. Midship vehicles have a drive system, such as an engine, placed between the wheelbases, so that the weight distribution of the front and rear wheels of the vehicle can be improved in a direction that improves the vehicle's kinetic performance and the drive system can be placed behind the seats. In this case, there is an advantage that the length of the overhang portion at the front and rear portions of the vehicle body (the protrusion of the vehicle body portion in the front-rear direction from the axle) can be reduced. In addition, since no drive system is provided in the overhang portion, the vehicle height can be reduced, and thereby the aerodynamic characteristics can be improved. As a result, fuel efficiency can be improved. Further, the degree of freedom in designing the front and rear portions of the vehicle body can be improved.

[0003] In the midship vehicle disclosed in Japanese Patent Application Laid-Open No. 60-85027, the engine is arranged in a vertical position with the axis of its cylinder bore oriented in the vertical direction.
In the apparatus disclosed in Japanese Patent No. 8,295, the cylinder bore is arranged in a horizontal posture with the axis of the cylinder bore directed in the front-rear direction.

[0004]

[Problem to be Solved by the Invention] When a midship vehicle is applied to a family car requiring a large cabin space in which a drive system including an engine is arranged between wheelbases, a cabin space including a luggage space is applied. The key issue is how to secure the information. In other words, the rear seats must be displaced forward in order to secure the mounting space for the driving system such as the engine, and if this is done, the undercarriage of the rear seat occupants will be narrowed and it will be cramped, There is a problem that becomes worse.

[0005] For example, in a front engine vehicle, the space behind the rear seats can be entirely used as a luggage compartment space. However, in a midship vehicle, a driving system including an engine is mounted in the space behind the rear seats. Room space is limited. In particular, in the structure disclosed in Japanese Patent Application Laid-Open No. 60-85027, the engine is mounted in an upright position, so that the luggage space provided above the engine is narrow. On the other hand, the French patent
In the structure of No. 1,518,295, a relatively large luggage space can be secured above the engine because the engine is tilted. However, if the engine is tilted down until the axis of the cylinder bore is positioned substantially in a horizontal plane in order to increase the volume of the luggage compartment space, the engine will be in a posture extending long in the front-rear direction, so the rear seat is shifted forward by that much. I have to arrange it.

[0006] The present invention has been made in view of such circumstances, and it is possible to provide the largest possible cabin space while taking advantage of the midship car, and therefore, a family car that requires a relatively large cabin space. It is an object of the present invention to provide a structure of a midship vehicle that can be effectively applied to such applications.

[0007]

In order to achieve the above object of the present invention, a luggage room provided in an upper space area of a floor panel behind a seat and above a rear wheel is provided with a wheel base with respect to a longitudinal direction of the vehicle. An engine arranged in a horizontal position such that an axis of a cylinder bore is positioned substantially in a horizontal plane in a lower space of the floor panel, behind the seat and below the luggage compartment in an inside area, and below the luggage compartment. A transmission disposed in the lower space of the floor panel and connected to the engine in a power transmission relationship, and coupled to the transmission disposed in the lower space of the floor panel below the luggage compartment and having a power transmission relationship with the transmission; A horizontal engine mounted on the vehicle such that an output shaft of the engine extends in a vehicle width direction, Serial transmission is positioned adjacent the engine, characterized in that the input shaft is an output shaft coaxially of said engine.

In this case, one mode is that a luggage compartment is provided in the upper space area of the floor panel behind the seat and above the rear wheel, and the rear of the seat in the inner area of the wheel base with respect to the longitudinal direction of the vehicle. And an engine arranged in a horizontal posture such that an axis of a cylinder bore is located substantially in a horizontal plane in a lower space of the floor panel below the luggage compartment, and is arranged in a lower space of the floor panel below the luggage compartment. A transmission connected to the engine in a power transmission relationship, and a differential device disposed in a lower space of the floor panel below the cargo compartment and coupled to the transmission in a power transmission relationship, The engine is a horizontal engine mounted on the vehicle such that an output shaft extends in a vehicle width direction, and the transmission is In substantially the same horizontal plane with the engine, but the engine type placed so parallel transmissions horizontal, characterized in that the input shaft is disposed so as to extend parallel to the output shaft of the engine.

In another aspect, a luggage compartment is provided in an upper space area of a floor panel behind a seat and above a rear wheel, and in a region inside an inside of a wheel base with respect to a front-rear direction of the vehicle. An engine arranged in a horizontal posture such that an axis of a cylinder bore is located substantially in a horizontal plane in a lower space of the floor panel below the luggage compartment, and an engine arranged in a lower space of the floor panel below the luggage compartment. A transmission connected to the engine in a power transmission relationship, and a differential device arranged in a lower space of the floor panel below the luggage compartment and coupled to the transmission in a power transmission relationship; A vertical engine mounted on the engine such that its output shaft extends in the front-rear direction of the vehicle; , The disposed adjacent to the engine, the input shaft is of engine type placed directly transmissions vertically provided on the output shaft coaxially of said engine.

[0010] Still another mode is that a luggage compartment is provided in the upper space area of the floor panel behind the seat and above the rear wheel, and the rear of the seat and in the inner area of the wheel base in the front-rear direction of the vehicle. An engine disposed in a horizontal position such that an axis of a cylinder bore is located substantially in a horizontal plane in a lower space of the floor panel below the luggage compartment; and an engine disposed in a lower space of the floor panel below the luggage compartment. A transmission that is connected in a power transmission relationship with the transmission, and a differential device that is disposed in a lower space of the floor panel below the cargo compartment and is coupled in a power transmission relationship with the transmission. A vertical engine mounted on the vehicle such that its output shaft extends in the front-rear direction of the vehicle, wherein the transmission is In substantially the same horizontal plane as the engine is a parallel transmission longitudinal engine types the input shaft is arranged to extend parallel to the output shaft of the engine.

In another aspect, an auxiliary machine is disposed between a transmission and a differential via a rear wheel drive shaft connected to the differential via an idler gear and transmitting the output to a rear wheel, and the transmission. It is the structure which did.

In still another feature, the rear portion of the horizontally mounted engine mounted in the horizontal posture is bulged rearward of the engine at least to a position beyond the rotation axis of the differential so that the output shaft is located behind the cylinder. ,
A structure is provided in which a differential and an oil pan are formed so as to be adjacent to each other in the vehicle width direction, and a rear wheel drive shaft is supported by a facing wall portion extending in the front-rear direction of the oil pan.

[0013] Still another feature is that a luggage compartment is provided in the upper space area of the floor panel behind the seat and above the rear wheel, and the rear of the seat and in the inner area of the wheel base in the front-rear direction of the vehicle. An engine arranged in a horizontal posture such that an axis of a cylinder bore is located substantially in a horizontal plane in a lower space of the floor panel below the luggage compartment;
A transmission arranged in a lower space of the floor panel below the luggage compartment and connected to the engine in a power transmission relationship, and a power transmission relationship with the transmission arranged in a lower space of the floor panel below the luggage compartment. And a differential device that is coupled with the vehicle, and the seat back of the seat may be capable of bending forward to enable engine service. Alternatively, a luggage compartment provided in an upper space area of a floor panel behind a seat and above a rear wheel, and the luggage compartment rearward of the seat and below the luggage compartment in an inner region of a wheel base with respect to a vehicle longitudinal direction. An engine disposed in a horizontal position such that the axis of the cylinder bore is located substantially in a horizontal plane in a lower space of the floor panel, and having a power transmission relationship with the engine disposed in a lower space of the floor panel below the luggage compartment. And a differential device arranged in a lower space of the floor panel below the luggage compartment and coupled to the transmission in a power transmission relationship, and a luggage compartment and an engine provided above the engine The structure which enables a service through the partition which partitions a room may be sufficient. In this case, the partition wall may be provided with an opening to the extent that service is possible, and the opening may be closed with a hatch or the like and usually opened during service.

According to another feature, a luggage compartment is provided in an upper space area of a floor panel behind a seat and above a rear wheel, and a back of the seat and in an inner area of a wheel base in a front-rear direction of the vehicle. An engine arranged in a horizontal posture such that an axis of a cylinder bore is located substantially in a horizontal plane in a lower space of the floor panel below the luggage compartment, and an engine arranged in a lower space of the floor panel below the luggage compartment. A transmission connected to the engine in a power transmission relationship, and a differential device arranged in the lower space of the floor panel below the cargo compartment and coupled to the transmission in a power transmission relationship, The outside air is introduced from the side to cool the luggage compartment and the engine. In another example of a preferred embodiment, a luggage compartment is provided in an upper space area of a floor panel behind a seat and above a rear wheel, and the luggage space behind the seat and the load in an inner area of a wheel base in a front-rear direction of the vehicle. Below the room,
The engine is disposed in a horizontal position such that the axis of the cylinder bore is located substantially in a horizontal plane in the lower space of the floor panel, and has a power transmission relationship with the engine disposed in the lower space of the floor panel below the luggage compartment. And a differential device disposed in the lower space of the floor panel below the cargo compartment and coupled with the transmission in a power transmission relationship, wherein the axis of the cylinder bore of the engine is the rotation of the differential. It is arranged so as to be located above the axis. Therefore, the engine power is taken out from the rear part of the engine, transmitted to the rear and downward, and transmitted to the rear wheel drive shaft via a differential to drive the rear wheels.

In a preferred embodiment of the parallel transmission lateral engine type structure, the engine, the differential and the transmission are arranged in this order from the front in the front-rear direction of the vehicle. Further, in the structure of the direct-coupled transmission vertical engine type, preferably, the engine, the differential, and the transmission are sequentially arranged from the front in the front-rear direction of the vehicle.

In order to achieve the above object of the present invention, an in-line multi-cylinder engine and a horizontally opposed multi-cylinder engine are preferable.

[0017]

According to the present invention, the drive system including the engine is mounted on a midship vehicle, and is configured so that the advantages of the midship vehicle can be utilized as it is. That is, since the drive system is not arranged at the front of the vehicle, the degree of freedom in design increases. Therefore, the aerodynamic resistance can be reduced by lowering the front structure of the vehicle, and the fuel efficiency can be improved. Similarly, the degree of freedom in the design of the structure of the rear part of the vehicle body where the drive system is not disposed is improved. Therefore, for example, the amount of overhang before and after can be reduced. In the present invention, in providing the structure of the midship vehicle, the engine is mounted in a horizontal position behind the seat and below the luggage compartment. An engine power transmission system extends rearward and preferably downward from the engine and is connected to the rear wheel drive shaft to transmit power to the rear wheels. By setting the engine in the horizontal position, the space above the engine can be widened, and therefore, when the luggage space is formed here, a wide space can be secured. Also, when the drive system is arranged so that the axis of the cylinder bore of the engine and the rear wheel drive shaft are not in the same horizontal plane, the length of the drive system in the front-rear direction can be reduced, and therefore, the rear end of the seat is It can be installed at the back of the room, and the cabin space can be relaxed.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Referring to FIGS. 1 and 2, there is shown a structure of a rear portion of an automobile 1 according to one embodiment of the present invention. The vehicle 1 of this example has a vehicle compartment 2 in the center, and a rear seat 3 is provided at the rear of the vehicle compartment 2. A luggage compartment 4 is provided behind the rear seat 3 and above the rear wheel.

The rear seat 3 is arranged on the rear of the floor panel 5. A floor panel 6 of a luggage compartment 4 extending horizontally and rearward from a position near the intermediate height of the seat back 3a of the rear seat 3 is provided. Above the rear seat 3, there is provided a rear window 8 which extends rearward and downward from the rear end of the roof panel 7 so as to be inclined. A trunk lid 9 extending substantially horizontally rearward is attached to the lower end of the rear window 8 so as to be openable and closable, so that the luggage compartment 4 can be accessed. A pair of rear side frames 10 extending forward and backward are provided at both lower end portions of the vehicle 1. The rear side frame 10 extends straight and parallel to the vicinity of the rear end of the vehicle compartment 2, extends upward and inward in front of the rear wheel, and extends again inside the rear wheel and extends straight rearward.

A cross member 11 is mounted below the rear seat 3 so as to extend in the vehicle width direction and to be connected to the rear side frame 10. A drive device 13 is disposed between the pair of rear wheels 12. And the driving device 1
The four-cylinder engine 14, which forms a part of the engine 3, is disposed in front of the rear wheel drive shaft 15, that is, between the wheel bases. Therefore, the automobile 1 of the present embodiment is a so-called midship vehicle. Further, the engine 14 of the present embodiment is a so-called horizontal engine whose output shaft 15 extends in the vehicle width direction.

Further, the engine 14 of the present embodiment is mounted in a horizontal posture in which the cylinders are arranged so as to substantially horizontally stroke back and forth. The transmission 16 is arranged adjacent to the engine 14 so that the input / output shaft also extends in the vehicle width direction. That is, the drive device 13 of the present embodiment is a drive device 13 of a transmission type directly connected to a horizontal engine. In the structure of this example, the output shaft 15 of the engine and the input / output shaft of the transmission 16 are coaxial and extend in the vehicle width direction. A differential 17 is mounted slightly behind and below the output shaft of the transmission 16. The differential 17 is connected to a rear wheel drive shaft 18. The rear wheels 12 are attached to the ends of the left and right drive shafts 18 so that the driving force from the differential 17 is transmitted and the rear wheels 12 are driven to rotate. Rear side frame 1 on the left side of the engine when viewed from behind the car
An air cleaner 19 is disposed inside the cylinder 0. The air cleaner 19 is connected to an intake manifold 22 integrated with a surge tank 21 via an intake pipe 20, and the intake manifold 22 is connected to each cylinder of the engine 14 by a branch pipe. ing.

The cylinder head 23 of the engine 14
A direct-coupled catalytic converter 24 extending in the lateral direction is arranged below the rear side frame 10 in front of the front side. The exhaust pipe 25 from the catalytic converter 24 is connected to the engine 14
And, it extends rearward below the rear wheel drive shaft 18 and is connected to a main silencer 28 via a catalytic converter 26 and a pre-silencer 27 extending laterally behind the differential 17.

A hydraulic pump 30 of a power steering mechanism is disposed obliquely above the cylinder block 29 of the engine 14 and below the right rear side frame 10 when viewed from the rear. An alternator 31 is disposed below the hydraulic pump 30 of the mechanism, and above the rear end of the engine and the differential 17 and the main silencer 2.
An air conditioner compressor 32 is arranged in a space in front of the air conditioner 8.

In the structure of the present embodiment, the catalyst bipath valve 3 is located on the lower right side of the cylinder head 23 of the engine 14.
The exhaust from the exhaust manifold 34 is introduced into the exhaust system behind the engine 14 via the catalytic converter 24 or the bypass in front of the engine. The rear wheel is supported by a suspension having a trailing arm 35 and two lateral links 36,37.

In the power transmission system having the structure of this embodiment, the engine 1
In 4, the piston strokes in the front-rear direction of the vehicle body and transmits its power to an output shaft extending in the lateral direction. This power is transmitted to a differential 17 provided diagonally below and behind the output shaft.
The power transmitted to 7 is distributed to the left and right and transmitted to the left and right rear wheels as a drive shaft.

In the structure of the present embodiment, the engine is arranged in the horizontal position as described above, so that the space above can be enlarged and the luggage compartment can be relaxed. Further, in the front-rear direction, the center of the cylinder bore of the engine in which the piston slides, that is, the center of the crankshaft, which is the output shaft of the engine, is located higher than the center axis of the differential 17, so that the two are moved closer to each other in the front-rear direction. be able to. Therefore, the length of the drive system in the front-rear direction can be reduced. That is, in the structure of this example, the driving device can be configured to be compact in the up-down direction and the front-back direction. By mounting the luggage compartment floor panel as close to the drive device 13 as possible and below it, the space above the drive device can be effectively used. Further, by arranging the rear seat 3 as close to the rear as possible, the front space can be widened.

Referring now to FIGS. 3, 4, 5 and 6, another embodiment of the present invention will be described. In FIG. 3, the engine 14 of this example is an in-line six-cylinder engine, and is mounted in a substantially horizontal position with the cylinder head 23 forward as in the previous example. In the configuration of the present example, the engine 13, the differential 17 (the rear wheel 12 and the rear wheel drive shaft 18), and the transmission 16 are arranged in this order from the front. As shown in FIG. 5, the output shaft 15 of the engine 14
The rotation shaft (rear wheel drive shaft 18) of the differential 17 and the input / output shafts 40 and 41 of the transmission 16 are arranged side by side so as to extend in the lateral direction. In this case, the clutch 42 is arranged adjacent to the engine. Clutch 4
2 has an output gear 43 at the end opposite to the engine 14 side. An input gear 44 is provided at the input side end of the input shaft 40 of the transmission 16 located behind the differential 17 and the rear wheel drive shaft 18 coaxial with the differential 17. The output gear 43 of the clutch 42 and the input gear 44 of the transmission 16 are connected via a chain 45 so that the engine output is input to the transmission 16 via the clutch 42. In the transmission 16 of this embodiment, the input shaft 40 and the output shaft 41 are coaxially arranged in a nested manner, and are freely rotatable relative to each other. The transmission 16 includes a counter shaft 46, and the engine output transmitted to the input shaft 40 via the input gear 44 is input via intermediate gears 47 and 48. The gear ratio changes depending on the combination of the gear on the counter shaft 46 and the gear on the output shaft 41, whereby the speed is changed. The output shaft 41 has an output gear 49 at the left end in FIG. 5, and is input to the input gear 50 of the differential 17 via the output gear 49. The engine output is distributed by a differential 17 and transmitted to left and right rear wheel drive shafts 18 and further transmitted to left and right rear wheels 12.

That is, the engine output is controlled by the clutch 42
Through the chain 45 to the transmission 16 located rearward from the rear wheel 12 and then transmitted from the transmission 16 to the front differential 17. Referring again to FIGS. 3 and 4, the air cleaner is disposed on the right side of the engine when viewed from the rear of the vehicle, and the intake duct 51 is disposed in front of the air cleaner. Air cleaner 19
Is introduced into the surge tank 21 through an intake pipe, and further from the surge tank 21 into the engine 14 through an intake manifold 22 in front of the surge tank 21. Below the cylinder head 24 of the engine 14 is disposed a catalytic converter 24 extending in the lateral direction along the engine 14. Further, above the left side of the engine, an alternator 31, an air conditioner compressor 32, and a hydraulic pump 30 of a power steering mechanism are arranged from the front. A main silencer 28 extending in the lateral direction is arranged behind the transmission 16, and a catalytic converter 26 is arranged in a space between the transmission 16 and the main silencer 28 so as to extend laterally and rearward. A pipe 25 from the catalytic converter 24 extends rearward below the engine and reaches the catalytic converter 26.

In the structure of this embodiment, the cross members 52, 5 are provided below the rear seat so as to connect the rear side frames.
3, 54 and 55 are arranged. Rear side frame 1
0 is curved inward and upward behind the rear seat 3 and extends substantially horizontally rearward inside the rear wheel, and further downwardly curves and extends rearward behind the rear wheel. The rear wheel suspension includes two lateral links 36 and 37 and a damper assembly 56. The lateral links 36 and 37 and the damper assembly 56 are connected to a hub (not shown) of the rear wheel 12 and extend below the driving device 13 to form a suspension lower arm 5 having a structure as shown in FIG.
7 is attached. The engine 14 is mounted on the rear side frame 10 and the clutch 42 via engine mounts 58, 59, 60. Further, the catalytic converter 24 and the main silencer 28 are also attached to the rear side frame 10 via an appropriate bracket 61.

According to the present embodiment, the engine 14 is arranged in the lateral direction, so that the multi-cylinder engine can be arranged with a margin. An air cleaner 19 can be arranged. That is, the lateral arrangement of the engine 14 can be made compact. Further, since the transmission 16 is disposed so as to extend in the lateral direction behind the differential 17, the driving device 13 can be made compact in the front-rear direction.

Referring to FIGS. 7 and 8, there is shown a structure according to still another embodiment of the present invention. In the structure of the present embodiment, the engine 14 is a horizontally opposed six-cylinder engine, and is mounted with the output shaft extending in the front-rear direction of the automobile 1, that is, in the vertical direction. The transmission is disposed adjacent to the rear side of the engine 14 and similarly mounted so that the output shaft extends in the front-rear direction. The transmission is transmitted from a bevel gear as an output gear 49 provided at an end of an output shaft 41 provided in parallel with the input shaft 40 to a bevel gear as an input gear 59 of the differential 17. In the configuration of this example, the alternator 31 and the air conditioner compressor 32
The hydraulic pump 30 of the power steering mechanism is disposed in a space between the engine 14 and the rear side frame 10 in front of the engine 14 or in a space between the engine 14 and the rear seat. In addition,
In this case, the air cleaner 19 is disposed above the left side of the engine 14 when viewed from behind. The exhaust pipe from the engine 14 extends rearward, upward and inward from both sides and is connected to a laterally extending catalytic converter 26 and a main silencer 28 via a generally vertically extending catalytic converter 24 provided respectively. In the structure of the present embodiment, particularly, a space is provided between the rear side frames 10 behind the wheels, so that the degree of freedom of arrangement of the catalytic converter 24, the main silencer 28, the suspension and the like can be improved.

In the structure of the present embodiment, the rear side frame 10 extends straight and horizontally rearward above the driving device 13, so that the space above the driving device 13 can be widely used. Hereinafter, still another embodiment according to the present invention will be described with reference to FIGS. 9, 10, and 11. FIG.

The engine of this embodiment is a horizontally opposed six-cylinder engine 14 whose vertical axis extends in the front-rear direction. On the other hand, the transmission is engine 1
4 are arranged side by side immediately behind the engine 14 so as to extend in a direction perpendicular to the output shaft of the engine 4, that is, in a lateral direction.
Further, the differential 17 and the rear wheel drive shaft 18 extend parallel to and below the output shaft of the transmission at a slightly rearward position. The output shaft of the engine 14 extends horizontally and rearward between the transmission 16 and the differential 17 as shown in FIG.
The output shaft 70 of the clutch 42 connected to the
4 has a hollow structure in which the output shaft 15 is housed, and is connected to a gear 75 on the input shaft 40 of the transmission via gears 71, 72, 73 and 74. Therefore, the output of the engine 14 is temporarily transmitted to the clutch 42 located behind the transmission 16 and the differential 17, then transmitted forward, and transmitted to the rear wheel 12 via the differential 17 and the rear wheel drive shaft 18. .

In the structure of this embodiment, as in the case of FIGS. 7 and 8, the alternator 31 and the compressor 3 for the air conditioner are used.
2. The pump 30 of the power steering mechanism is the engine 1
4 is disposed in the space between the front seat and the rear seat. The air cleaner 19 is disposed on the right side of the engine 14 when viewed from behind. The structure of this example can provide a structure of the drive device 13 that is compact particularly in the front-rear direction.

A structure according to still another embodiment of the present invention will be described with reference to FIGS. The engine 14 of the present example is an in-line six-cylinder engine, and is mounted in a vertical orientation in a horizontal posture. Transmission 1
Numerals 6 are arranged side by side on the right side as viewed from behind so as to extend in the front-rear direction parallel to the output shaft 15 of the engine 14. Also,
The clutch 42 is located behind the differential 17. In this structure, the output shaft 15 of the engine 14 extends rearward beyond the differential 17 and the clutch 42
From the output gear 43 to the input shaft 4 of the transmission 16
0, and transmitted to the input gear 44,
, And transmitted from the bevel gear as the output gear 49 to the bevel gear as the input gear 50 of the differential 17. In this configuration, the alternator 31 and the air conditioner compressor 3
2. The pump 30 of the power steering mechanism is disposed in the space inside the rear side frame 10 behind the rear seat 3 and near the front of the engine 14. Further, the air cleaner 19 is arranged in the space in front of the transmission 16 on the right side of the front end of the engine 14 when viewed from behind. In the structure of the present embodiment, the transmission 16 is arranged so as to extend in the front-back direction along the engine 14 by utilizing the space formed by setting the engine 14 long in the front-rear direction in a horizontal posture, so that the transmission 16 is compact in the left-right direction. In addition, since the mounting positions of the heavy engine 14 and the transmission 16 are lowered, the center of gravity is lowered as a whole, and the stability can be improved.

A further embodiment according to the present invention will be described with reference to FIGS. The engine 14 of the present embodiment is a horizontally mounted in-line four-cylinder engine 14 mounted in a horizontal position. The transmission 16 is provided coaxially adjacent to the output shaft 15 of the engine 14. Behind the input shaft 40 of the transmission 16,
An output shaft 41 is provided in parallel with the output gear 49.
Is the differential 1 through the intermediate idler gear 90.
7 is engaged with the input gear 50. In the structure of this example, the differential 17 and the transmission 1
The air conditioner compressor 32 is disposed on the right side when viewed from the rear of the space portion 6. Further, a pump 30 of the power steering mechanism is provided in front of the power steering mechanism, and an alternator 31 is provided behind the power steering mechanism. Further air cleaner 19
Is a space in front of the transmission 16 on the left side of the engine 14, behind the rear seat 3 and inside the rear side frame 10. Further, the catalytic converter 24 of the exhaust system is disposed above the cylinder head 23 of the engine 14 and is arranged side by side with the engine 14. Exhaust pipe 25
Extends downward and rearward from the catalytic converter 24 and extends rearward below the drive device 13 to be connected to the catalytic converter 26 and the main silencer 28. In the configuration of this example, since the idler gear 80 is interposed between the transmission 16 and the differential 17 to form a space, an auxiliary device (alternator 31) can be disposed in this space. Therefore, the vertical direction of the driving device 13 can be made compact.

Referring to FIGS. 16 and 17, rear wheel drive shaft 1
The case where the support structure 8 is constituted by an oil pan will be described. The engine 14 of the present embodiment is a horizontal and horizontal in-line six-cylinder engine, and the transmission 16 is a direct-coupled transmission that extends in the lateral direction continuously to the output shaft of the engine 14. The auxiliary components of the engine 14, that is, the alternator 31, the compressor 32 for the air conditioner, and the pump 30 of the power steering mechanism are provided in a space formed on the right side when viewed from behind the rear seat 3 and the front end of the engine 14 inside the rear side frame 10. Placed in An oil pan 91 is provided at the rear end of the engine 14.
The oil pan 91 extends rearward beyond the rear wheel drive shaft 18, and has a structure in which the rear wheel drive shaft 18 penetrates the inside. Referring to FIGS. 18, 19, and 20, the oil pan 91 is attached to a rear end portion of the engine 14 by a bolt (not shown) through a bolt hole 92. Constitutes an oil pan section 93 which swells backward and stores oil. A support portion 96 for the rear wheel drive shaft 18 is formed on a pair of wall portions 94 and 95 extending rearward of the oil pan portion 93. Also,
A plurality of ribs 97 are formed to reinforce the support.

Referring to FIG. 21, there is shown a mechanism for enabling the driving device 13 according to the above embodiment to perform service access. In the configuration of the present example, an opening / closing lid 102 is provided on the floor panel 6 of the luggage compartment 4 so as to be able to open and close via a hinge mechanism 101 in order to enable the service of the driving device 13. In this example, the automobile 1 is a hatchback type and is provided with a rear door 103 instead of the trunk lid 9. A striker 104 for opening and closing the rear door 103 is provided at the center of the lower end of the rear door 103. On the other hand, a lock mechanism 106 is provided at a position corresponding to the rear body 105. Referring to FIG. 22 as well, opening and closing the door 103 uses the lock mechanism 10
6 and rotated by inserting it into the key cylinder 107 interlocking with the key cylinder 6.

A mechanism for opening and closing the opening / closing lid 102 is provided. In the structure of this example, in the normal state, the opening / closing lid 102 provided with the fixing plate 108 on the luggage compartment floor panel 6 is pressed from above to maintain the closed state. The fixing plate 108 is movable forward and backward, and normally, the fixing plate 108 is maintained at a front position by the lock mechanism 110 while receiving the urging force of the spring 109 backward. This maintains the floor panel 6 in the closed state.

The lock mechanism 1 of the floor panel 6
Reference numeral 10 is connected to the key cylinder 107. The lock mechanism 110 can be released by inserting a key into the key cylinder 107 and rotating it by a predetermined amount. Thus, the fixing plate 108 can be retracted rearward by pulling out the depression 111 formed on the upper surface with a hand. Thereby, the opening / closing lid 102 can be opened forward through the hinge mechanism 101. The lock mechanism 11 of the floor panel 6
0 is linked to the operation of the key cylinder 107 in common with the lock mechanism 106 of the rear door 103, but the operation angle of the key cylinder 107 is an amount required to open and close the rear door 103 (for example, 45 °). ), The opening / closing lid 102 is configured not to open unless operated by a predetermined amount (for example, 90 °) or more.

As described above, the service of the driving device 13 can be performed by opening the rear door 103 and operating the mechanism common to the rear door 103 to open the opening / closing lid 102. Referring to FIG. 23, a mechanism that allows yet another service access to the drive 13 is disclosed. In the structure of the present example, the seat back 3a of the rear seat 3 has a structure that can be tilted forward, and a bulkhead portion that separates the passenger compartment 2 and the driving device 13 has an openable / closable rear portion. A possible thermal barrier 121 is mounted integrally with the seat back 3a. Normally, the seat back 3a is provided with a lock mechanism 122 attached to the floor panel 6 of the luggage compartment 4.
It is fixed so that it cannot tilt. If necessary, the lock mechanism 122 is released, and the seat back 3a can be tilted forward to open the heat-insulating wall 122 and access the drive device 13.

The contact portion between the periphery of the heat insulating wall 121 and the bulkhead portion is sealed by an appropriate means. FIG.
Referring to FIG. 25, a structure for cooling the engine 14 according to the present invention is schematically shown. In the structure of this example,
An outside air inlet 132 is provided on a side portion of the rear fender 131, and the outside air passes through the passage 132 extending upward.
a into the luggage compartment 4. Further, an opening 13 is provided in the package tray 133 that separates the cargo room 4 from the rear of the cabin 2.
The room air is introduced into the luggage compartment 4 through the opening 134. At the rear of the floor panel 6 of the luggage compartment 4, a fan 135 is attached.
The outside air and room air introduced into the luggage compartment 4 by the fan 135 driven by the motor 136 are forcibly introduced into the engine room below the floor panel 6 as shown by arrows, thereby cooling the engine 14.

Referring to FIG. 26 and FIG.
Another configuration of the cooling mechanism will be described. In the structure of this example, the outside air inlet 13 provided in the rear fender 131 is provided.
2 is introduced into the fan 135 by a passage 141 formed along the upper surface of the floor panel 6 of the luggage compartment 4.

In the configuration shown in FIGS. 28 and 29,
The outside air is introduced into both the luggage compartment 4 and the engine room through the outside air introduction port 132 of the rear fender 131. Further, a discharge mechanism 142 is provided to discharge the cooled air to the outside of the vehicle. As shown in FIG. 30, an opening / closing shutter 144 is provided in the opening 143 to which the fan 135 is attached, and the shutter 144 is closed when the fan 135 is stopped. Thus, the backflow of the hot air from the engine room when the fan 135 is stopped can be prevented.

[0045]

According to the present invention, the drive unit of the midship vehicle is made compact in both the front-rear direction and the up-down direction, so that the luggage space above the drive unit can be increased, and the rear passenger's undercarriage. Can be relaxed. Further, lowering of the center of gravity of the vehicle can be promoted, and running stability can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a structure of a rear part of a midship vehicle according to one embodiment of the present invention;

FIG. 2 is a cross-sectional view of the automobile shown in FIG.

FIG. 3 is a plan view similar to FIG. 1 according to another embodiment of the present invention,

FIG. 4 is a sectional view similar to FIG. 2 of the motor vehicle of FIG. 3;

FIG. 5 is a partial cross-sectional view of the driving device of the automobile of FIG. 3;

FIG. 6 is a perspective view of a rear suspension lower arm of the embodiment of FIG. 3;

FIG. 7 is a plan view similar to FIG. 1, according to yet another embodiment of the present invention;

8 is a sectional view similar to FIG. 2 of the vehicle of FIG. 7;

FIG. 9 is a plan view similar to FIG. 1, according to yet another embodiment of the present invention;

10 is a sectional view similar to FIG. 2 of the motor vehicle of FIG. 9;

11 is a cross-sectional view of the driving device of the automobile in FIG. 9;

FIG. 12 is a view similar to FIG. 1, according to yet another embodiment of the present invention;

13 is a view similar to FIG. 2 of the motor vehicle of FIG. 12,

FIG. 14 is a view similar to FIG. 1, according to yet another embodiment of the present invention;

15 is a view similar to FIG. 2 of the motor vehicle of FIG. 14,

FIG. 16 is a view similar to FIG. 1 of a motor vehicle provided with a drive device having an oil pan having a structure according to the present invention;

17 is a view similar to FIG. 2 of the motor vehicle of FIG. 16;

FIG. 18 is a plan view of the oil pan of FIG. 16;

FIG. 19 is a front view of the oil pan of FIG. 16;

20 is a perspective view of the oil pan of FIG.

FIG. 21 is a perspective view showing a structure enabling service access of the driving device according to the present invention;

FIG. 22 is a perspective view showing a main part of the structure of FIG. 21;

FIG. 23 is a cross-sectional view showing another structure that enables service access;

FIG. 24 is a schematic sectional view showing an air introduction mechanism to an engine room;

25 is a sectional view taken along line BB of FIG. 24;

FIG. 26 shows a mechanism for introducing air into an engine room.
Figure similar to 4,

27 is a view similar to FIG. 24 of the mechanism of FIG. 26,

FIG. 28 shows a mechanism for introducing air into an engine room.
Figure similar to 6,

FIG. 29 is a view similar to FIG. 27 of the mechanism of FIG. 28;

FIG. 30 is a partial cross-sectional view of the vicinity of a fan of an air introduction mechanism into an engine room.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile 3 Rear seat 12 Rear wheel 13 Drive device, 14 Engine 15 Engine output shaft 16 Transmission 17 Differential 18 Rear wheel drive shaft 19 Air cleaner 23 Cylinder head 24 Catalytic converter 25 Exhaust pipe 26 Catalytic converter 27 Pre-silencer 28 Main silencer 29 Cylinder block Reference Signs List 30 Pump for power steering mechanism 31 Alternator 32 Compressor for air conditioner 33 Bypass valve 40 Input shaft 41 Output shaft 42 Clutch

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kiyoshi Sakurai 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Co., Ltd. (72) Shinichi Yamaguchi 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda (56) References JP-A-63-247175 (JP, A) JP-A-64-36217 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 17/04 B60K 5/02 F02B 67/00

Claims (12)

(57) [Claims] 1. A floor pad behind a seat and above a rear wheel.
A luggage compartment provided in an upper space region of the flannel, and the floor panel behind the seat and below the luggage compartment in an inner region of the wheel base with respect to the longitudinal direction of the vehicle.
An engine arranged in a horizontal posture such that an axis of a cylinder bore is located substantially in a horizontal plane in a lower space of the engine; and an engine arranged in a lower space of the floor panel below the luggage compartment and having a power transmission relationship with the engine. And a differential device arranged in a lower space of the floor panel below the luggage compartment and coupled with the transmission in a power transmission relationship , wherein the output shaft of the engine extends in the vehicle width direction. So before
A horizontal engine mounted on the vehicle, wherein the transmission is disposed adjacent to the engine.
A drive device for a vehicle, wherein an input shaft thereof is coaxial with an output shaft of the engine . 2. A floor pad behind a seat and above a rear wheel.
Luggage compartment in the upper space area of the vehicle, and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
A differential device mounted on the vehicle such that an output shaft of the engine extends in a vehicle width direction, wherein the transmission has an input shaft substantially in the same horizontal plane as the engine. Is disposed so as to extend in parallel with the output shaft of the engine. 3. A floor pad behind a seat and above a rear wheel.
Luggage compartment in the upper space area of the vehicle, and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
A vertical engine mounted on the engine such that an output shaft of the engine extends in the front-rear direction of the vehicle, wherein the transmission is disposed adjacent to the engine, and an input shaft is provided. Is coaxial with an output shaft of the engine. 4. A floor pad behind a seat and above a rear wheel.
Luggage compartment in the upper space area of the vehicle, and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
A vertical engine mounted on the vehicle such that an output shaft of the engine extends in a front-rear direction of the vehicle, wherein the transmission has an input shaft substantially in the same horizontal plane as the engine. A drive device for a vehicle, wherein a shaft is disposed so as to extend in parallel with an output shaft of the engine. 5. The transmission according to claim 1, wherein an auxiliary device is connected between a transmission and a differential via a rear wheel drive shaft connected to the differential via an idler gear and transmitting the output to a rear wheel. A drive device for a vehicle, wherein the drive device is disposed. 6. The engine according to claim 1, wherein a rear portion of the horizontally mounted engine mounted in the horizontal posture is bulged rearward of the engine at least to a position exceeding a rotation axis of a differential so that an output shaft is positioned behind the cylinder. By
A vehicle drive device wherein a differential and an oil pan are formed adjacent to each other in the vehicle width direction, and a rear wheel drive shaft is supported by an opposing wall portion extending in the front-rear direction of the oil pan. . 7. A floor pad behind a seat and above a rear wheel.
Luggage compartment in the upper space area of the vehicle, and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
And a differential device for driving the vehicle, wherein the seat back of the seat is capable of tipping forward to enable engine service. 8. A floor pad behind a seat and above a rear wheel.
Luggage compartment in the upper space area of the vehicle, and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
A driving device for a vehicle, comprising: a differential device, and a service provided through a partition wall separating an engine room from a luggage room provided above the engine. 9. A floor pad behind a seat and above a rear wheel.
Luggage compartment in the upper space area of the vehicle, and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
A driving device for a vehicle, comprising: a differential device; and a configuration in which outside air is introduced from a side portion of the vehicle body to cool the luggage compartment and the engine. 10. A floor behind a seat and above a rear wheel.
The luggage compartment provided in the upper space area of the panel and the front in the inner area of the wheel base with respect to the longitudinal direction of the vehicle.
The floor panel behind the seat and below the luggage compartment
The axis of the cylinder bore is almost in the horizontal plane in the space below
An engine disposed in a horizontal position such that the engine is disposed in a lower space of the floor panel below the luggage compartment.
Connected to the engine in a power transmission relationship
A mission and a lower space of the floor panel below the luggage compartment.
The transmission is coupled with a power transmission relationship.
A drive device for a vehicle, comprising: a differential device, wherein an axis of a cylinder bore of the engine is positioned higher than a rotation axis of the differential. 11. The vehicle drive device according to claim 2, wherein the engine, the differential, and the transmission are sequentially arranged from the front in the front-rear direction of the vehicle. 12. The vehicle drive device according to claim 3, wherein the engine, the differential, and the transmission are sequentially arranged from the front in the front-back direction of the vehicle.