JP3357396B2 - Automotive power plant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a horizontally arranged V
The present invention relates to a power plant for an automobile in which a transmission is disposed laterally behind a model engine such that an engine output shaft and a transmission output shaft are parallel to each other.

[0002]

2. Description of the Related Art Conventionally, a power plant of an automobile has been developed.
For example, as shown in FIG. 4, a transmission 92 is arranged in series at the rear of a vertically disposed engine 91, and a crankshaft as an output shaft of the engine 91 and an input of the transmission are arranged. 2. Description of the Related Art A power plant in which an output shaft and an output shaft are arranged substantially linearly when viewed from a plane is known.

However, in such a configuration, it is relatively difficult to reduce the size and size of the power plant and to make it a low bonnet.
No. 561 discloses an automotive power plant.

That is, as shown in FIG. 5, an in-line multi-cylinder engine 93 (so-called I-type engine) is placed horizontally and rearwardly inclined in an engine room so that the engine output shaft is directed in the vehicle width direction. A transmission 94 is disposed horizontally behind the engine 93 so that the transmission output shaft is parallel to the output shaft of the transmission 94. Further, power transmission means 95 for transmitting the power of the engine output shaft to the transmission input shaft of the transmission 94. , A 2WD differential mechanism 97 is attached to the rear of the transmission case 96, and front drive shafts 98, 99 are disposed on the left and right sides of the differential mechanism 97.

According to the conventional parallel-horizontal-type power plant shown in FIG. 5, the power plant of the series-vertical type shown in FIG. On the other hand, when this structure is applied to a V-type engine, the following problems occur. That is, unlike the I-type engine, the V-type engine has one bank and the other bank. Therefore, when the V-type engine is placed horizontally and tilted rearward, the one bank located on the front side becomes With respect to the other bank located on the rear side, the bank top position is located at a higher position, so that not only a good streamline shape of the bonnet is not obtained, but also the exhaust passage from the bank located on the front side. There is a problem that the length is longer than the length of the exhaust passage located on the rear side, and the exhaust resistance is not uniform between the front and rear banks.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a V-type
Four-wheel drive (so-called 4WD) with gin placed horizontally
Transmission, front differential and
By setting the surface to a specific arrangement, the power plant
Achieved low bonnet by downsizing
While placing the exhaust pipe above the transmission.
Possible, especially when the catalyst is
By arranging them upstream, emission during cold
Is advantageous in securing space when adopting a configuration that takes countermeasures
The purpose is to provide an automotive power plant.

In one embodiment of the present invention, the transmission is arranged such that the main shaft having a relatively large diameter is located forward of the countershaft having a relatively small diameter. Another object of the present invention is to provide an automobile power plant that can improve space efficiency.

[0008]

According to the present invention, there is provided an automobile comprising:
The power plant is placed in the engine room so that the engine output shaft faces the vehicle width direction , and the upper part of the engine is in front.
An inclined V-type engine, and a transmission laterally arranged behind the V-type engine such that a transmission output shaft is parallel to the engine output shaft.
A power transmission means for transmitting power of the engine output shaft to a transmission input shaft of the transmission, wherein the transmission and a front differential are integrally formed at a rear portion of the V-type engine.
Place the above transmission at the top of the front differential
With the transfer
And place the transmitter in the side view of the car.
For front differential and front wheel drive between transfer and transfer
A configuration that the drive shaft is located, and the rear exhaust system
Is located above the transmission, and
The exhaust system and the rear exhaust system are catalyzed upstream of the collecting section.
The strike is arranged.

In one embodiment of the present invention, there is provided a power plant for an automobile in which the transmission is arranged such that a main shaft as a transmission main shaft of the transmission is located forward of a counter shaft as a sub transmission shaft. It is characterized by.

[0010]

According to the present invention, the V-type engine is mounted horizontally.
In a four-wheel drive (so-called 4WD)
Transmission and front differential and transfer
With the above arrangement, the power plant is compact and compact.
To achieve a low bonnet,
To allow the transmission to be positioned above
Yes, especially with catalysts upstream of the assembly
By arranging them, it is possible to take measures against emissions during cold
In this case, there is an advantageous effect in securing space.

According to one embodiment of the present invention, the transmission is arranged such that the main shaft having a relatively large diameter is located forward of the countershaft having a relatively small diameter. This has the effect that the space efficiency can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawing shows a power plant of an automobile, and FIG.
2 and 3, a dash lower panel 2 is erected at a front portion of a floor panel 1 to partition a cabin 3 and an engine room 4, while a cowl box extending in a vehicle width direction is provided at an upper portion of the dash lower panel 2. 5 are arranged.

In the engine room 4 described above, a V-type six-cylinder engine 7 is arranged horizontally so that a crankshaft 6 as an engine output shaft is directed in the vehicle width direction. The V-type engine 7 has a front bank B1 and a rear bank B2, and includes a cylinder block 8, cylinder heads 9, 9, and cylinder head covers 10, 10.
An oil pan 11 is provided below the cylinder block 8.
(See FIG. 3), and a crank pulley 12 is mounted on one end of the crankshaft 6, specifically, on the left end.

An intake manifold 14 integrally formed with a surge tank 13 is provided, and each intake passage of the intake manifold 14 is mounted so as to communicate with the above-described intake port of each of the banks B1 and B2.

The above-mentioned V-type 6-cylinder engine 7 is inclined forward as is clear from FIG. 1, and an exhaust manifold 15 is attached to the front bank B1 of the V-type engine 7 so as to communicate with the exhaust port. .

A catalyst 17 for purifying nitrogen oxides is connected downstream of the exhaust manifold 15 via a switching valve 16 (see FIG. 2), and a front exhaust pipe 18 and a three-way catalyst are provided downstream of the catalyst 17. List (three-way-catalyst, so-called TWC) 19, three-way catalyst 21 via middle exhaust pipe 20
And a bypass passage 22 for bypassing the above-mentioned catalyst 17 at the time of high load and high rotation is connected between the above-mentioned switching valve 16 and the downstream side of the catalyst 17 so that the heat resistance is relatively low. By bypassing the catalyst 17 at high load and high speed, the catalyst 1
7 is configured to prevent thermal deterioration. The nitrogen oxide purifying catalyst 17 described above is mainly used for purifying NOx during lean burn operation.

Similarly, an exhaust manifold 23 is attached to the rear bank B2 of the V-type engine 7 so as to communicate with the exhaust port. A catalyst 25 for purifying nitrogen oxides is connected downstream of the exhaust manifold 23 via a switching valve 24, a front exhaust pipe 26 is connected downstream of the catalyst 25, and a downstream of the front exhaust pipe 26 is connected. A bypass passage 28 is provided for connecting to the exhaust collecting portion 27 and for bypassing the above-mentioned catalyst 25 at the time of high load and high rotation, and this bypass passage 28 is provided between the above-mentioned switching valve 24 and the downstream of the catalyst 25. By connecting and bypassing the above-mentioned catalyst 25 having relatively low heat resistance at the time of high load and high rotation, the catalyst 25 is configured to be prevented from thermal deterioration. The exhaust system on the rear bank B2 side is shown in FIG.
As can be seen from FIG. 3, it is arranged to bend upward and pass above the transmission 32.

As shown in FIG. 3, a transmission 32 is disposed horizontally behind the V-type engine 7 so that the main shaft 30 and the countershaft 31 are parallel to the crankshaft 6 described above. ing.

A power transmission means 36 for transmitting the power of the crankshaft 6 to a transmission input shaft 35 via a clutch device 33 and a clutch output shaft 34 is provided. The power transmission means 36 includes a driving sprocket 37 fitted and fixed to the clutch output shaft 34 and the transmission input shaft 3.
5 is provided with a driven sprocket 38 fitted and fixed, and a chain 39 stretched between these sprockets 37, 38. These elements 37, 38, 39 are surrounded by a bridging member 40 and a chain cover 41. .

The above-described mounting member 40 is a member for mounting the V-type engine 7 and the transmission 32. The mounting member 40 is a member that also serves as the clutch housing 40a and the chain cover 40b on the other side.

An output gear 42 is fitted to the left extension of the main shaft 30 shown in FIG. 3, and a sun gear 43 and a planetary gear are further extended to the left extension of the main shaft 30. 44, ring gear 4
5 is provided. The center differential 46 is a differential device having a planetary gear mechanism that transmits the power of the main shaft 30 to the rear wheels and absorbs the rotational difference between the front and rear wheels. In this embodiment, the ring gear 45 is disposed on the left side in FIG. are doing.

Further, a front differential 48 having a ring gear 47 which always meshes with the output gear 42 is provided. The front differential 48 has pinion gears 49, 4
In this embodiment, a ring gear 47 is arranged on the left side in FIG. 3, and the above-mentioned side gears 50, 50 have left and right drive shafts for front driving. Left and right front wheels 57 and 58 are connected to the distal ends of the left and right drive shafts 51 and 52 via constant velocity ball joints 53 and 54 and front axle shafts 55 and 56.
Installed.

The drive shaft 51 between the left constant velocity ball joint 53 and the left side gear 50 has a gear 5 having input teeth 59a and output teeth 59b.
9 is arranged to transmit power from the output teeth 59b of the gear 59 to the rear transfer 60.

The above-mentioned transfer 60 is disposed obliquely rearward and downward of the front differential 48 as shown in FIG. 1, and the output from the above-mentioned output teeth 59b is provided inside a transfer housing 61 of the transfer 60. An input gear 62 for inputting, a transfer gear 63 disposed coaxially with the input gear 62, and a pinion gear 6 which always meshes with the transfer gear 63.
4 and a drive pinion shaft 65 formed integrally with the pinion gear 64 and driving a rear wheel via a propeller shaft (not shown).

In FIG. 1, 66 is a cooler condenser, 67 is a radiator, 68 is a pull-type cooling fan, 69 is a booster for braking, 70 is a front window glass, and 71 in FIG. A steering device having a pinion or the like, 72 is a front frame, 73 is a tire house, 74 is a tie rod,
75 is a knuckle arm and 76 is a bonnet.

By the way, the transmission 32 and the front differential 48 are integrally arranged at the rear of the V-shaped engine 7 which is arranged forwardly inclined as shown in FIG. 1, and the above-mentioned V-shaped engine 7 and transmission are arranged as shown in FIG. 3
It is integrally formed 2 and casings grayed 7 8 of the front differential 48.

Furthermore the side view of the automobile as shown in FIG. 1
The transmission 32 is disposed above the front differential 48 and the transmission 3
The transmission 32 is arranged so that the second main shaft 30 is located forward of the counter shaft 31. Also, as shown in FIG.
Between the transmission 32 and the transfer 60
Front differential 48 and front wheel drive
The shafts 51 and 52 are configured to be located.

The illustrated embodiment is constructed as described above, and its operation will be described below. A power transmission path from the V-type engine 7 to the transmission 32 is shown as a flow chart as follows. 7 → 33 → 34 → 37 → 39 → 38 → 35 The power transmission path from the main shaft 30 of the transmission 32 to the front wheels is shown as a flow diagram as follows. 30 → 42 → 47 → 48 → 51,52 → 53,54 → 5
5, 56 → 57, 58 Further, a power transmission path from the main shaft 30 of the transmission 32 to the rear wheel side is shown as a flow chart as follows. 30 → 46 → 43 → 59a → 59b → 62 → 63 → 64
→ 65 By the way, since the above-described V-type engine 7 is arranged forwardly inclined, the mounting position of the exhaust manifold 15 of the bank B1 located on the front side is located below, and the bank B2 located on the rear side is located on the lower side.
Of the exhaust manifold 23 is located at the upper side, and as a result, the length of the exhaust system from both the banks B1 and B2 can be set to be substantially equal, and the exhaust resistance can be made uniform. it is Ru can.

Further, as is apparent from FIG. 1, the V-type engine 7 is arranged to be inclined forward, so that the bank B located on the front side is disposed.
Since a low position relative to the top deck of the bank B2 located rearward 1 of the top deck, Ru can ensure good streamlined shape of the hood 76.

Further, since the transmission 32 is integrally disposed at the rear of the V-type engine 7, the V-type engine 7 and the transmission 32 are securely disposed in the engine room 4 of the vehicle having a long wheelbase and a short front overhang. can do.

[0031] In addition, V-type engine 7, transmission 32 and the casings grayed 7 three parties of the front differential 48
8 since the integrally formed as shown in FIG. 3, it is Ru can <br/> constitute the entire power plant even more compact size.

Further, since the transmission 32 is arranged above the front differential 48 whose arrangement position is specified corresponding to the positions of the front wheels 57 and 58, the space at the rear of the V-type engine 7 inclined forward can be used effectively. while, Ru it is possible to ensure good ground clearance.

In summary, the power of the vehicle of the above embodiment is
-The plant uses the engine output shaft (see crankshaft 6).
(Side) in the engine room 4 so that it faces the vehicle width direction.
V-type engine with the upper part of the engine 7 inclined forward
7 and the engine output shaft (see crankshaft 6)
The transmission output shaft (see main shaft 30)
It is placed horizontally behind the V-type engine 7 so that it becomes a line.
Transmission 32 and the engine output shaft
(See crankshaft 6)
Power transmission means for transmitting to the transmission input shaft 35 of the vehicle 32
An automotive power plant comprising a stage 36 and
The transmission 32 is provided at the rear of the V-type engine 7.
And the front differential 48 are integrated, and the front differential 4
Upper portion 8 to be positioned above the transmission 32, off
A transfer 60 is arranged diagonally rearward and downward of the Lontodef 48.
The transmission 3 in side view of the car
Front differential 48 and front wheels between 2 and transfer 60
A configuration in which drive drive shafts 51 and 52 are located;
And the rear exhaust system (front exhaust pipe 26
Is located above the transmission 32.
Installed in the front exhaust system and the rear exhaust system
The catalysts 17 and 25 are disposed on the downstream side.

As described above, the V-type engine 7 is arranged horizontally.
In four-wheel drive (so-called 4WD)
32, front differential 48 and transfer 6
0 by the above arrangement, the power plant can be reduced in size.
Achieving a low bonnet by downsizing
And the arrangement of the exhaust pipe above the transmission 32.
Can be made possible, especially when the catalysts 17, 25
By arranging each upstream of the collecting section 27,
Space when taking measures to prevent
This has the effect of being advantageous in securing security.

Further, since the transmission 32 is arranged such that the main shaft 30 having a relatively large diameter is located forward of the countershaft 31 having a relatively small diameter, the space efficiency is improved. Therefore, the transmission 32 can be effectively arranged at the rear of the V-type engine 7 in the narrow engine room 4.

In the correspondence between the configuration of the present invention and the above-described embodiment, the engine output shaft of the present invention corresponds to the crankshaft 6 of the embodiment, and similarly, the transmission output shaft corresponds to the main shaft 30. However, the present invention
It is not limited only to the configuration of the above embodiment.

For example, in the above-described embodiment, the V-type 6-cylinder engine 7 has been exemplified, but other V-type engines such as a V-type 10-cylinder engine and a V-type 12-cylinder engine may be used. The device for AT may be used instead of the device for MT.

[Brief description of the drawings]

FIG. 1 is a side view showing a power plant of an automobile according to the present invention.

FIG. 2 is a plan view of a main part of FIG. 1;

FIG. 3 is an exploded view showing the power plant of the automobile as viewed from above.

FIG. 4 is a schematic view showing a conventional series vertical power plant.

FIG. 5 is a schematic diagram showing a conventional parallel horizontal power plant.

[Explanation of symbols]

 4 ... Engine room 6 ... Crankshaft(Engine output shaft) 7. V-type engine17, 25… Catalyst 27… Assembly  30 ... Main shaft(Mission output shaft) DESCRIPTION OF SYMBOLS 31 ... Counter shaft 32 ... Transmission 35 ... Transmission input shaft 36 ... Power transmission means 48 ... Front differential51, 52 ... drive shaft 60 ... Transfer

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60K 5/04 F02B 75/22

Claims (2)

(57) [Claims] 1. A V-type engine in which an engine output shaft is laterally arranged in an engine room so as to face a vehicle width direction and an upper portion of the engine is inclined forward, and a transmission output shaft is parallel to the engine output shaft. And a power transmission means for transmitting the power of the engine output shaft to a transmission input shaft of the transmission, wherein the transmission is disposed laterally behind the V-type engine. At the rear of the V-type engine, the transmission and
The front differential is located above the front differential and the transmission is positioned integrally.
And place the transfer diagonally behind and behind the front differential.
Te, transmission and trans at the side view of the motor vehicle
Front differential and driveshaft for front wheel drive
And the rear exhaust system passes above the transmission.
In the front exhaust system and the rear exhaust system, and
A car power plant with a tallist . 2. A transmission main shaft of the transmission.
Main shaft is a counter shaft as a transmission countershaft
The transmission so that it is
The automotive power plant of claim 1 arranged .