JP3203426B2 - Engine accessory mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine accessory mounting structure.

[0002]

2. Description of the Related Art Auxiliary equipment for engines for automobiles and the like is relatively compact and has a small load, such as an oil pump for lubrication or a water pump, and is arranged at the front end of the engine or directly connected to a crankshaft. In some cases, the gears are driven by gears.However, in general, accessories such as compressors for air conditioners and alternators, which have large loads, and auxiliary machines are arranged at side positions near the front end or rear end of the engine, and cranks It is common to drive by driving a belt or chain from the end of the shaft. For example, in Japanese Patent No. 3838073, an engine and a transmission are arranged side by side and mounted laterally with respect to a vehicle body with a rear slant (inclined) to supplement a space created forward by the rear slant. Machine is located,
These accessories are configured to be driven by a belt stretched from a crankshaft.

[0003]

Since the front end or the rear end of the oil pan of the engine generally has a certain amount of dead space, there is a demand for utilizing this part to realize a compact arrangement of auxiliary equipment. There is. Therefore,
The present inventor, for example, when the engine and the transmission are arranged in parallel, by providing an integral oil pan below the engine and the transmission, the mounting area of the oil pan is sufficiently secured, and the volume of the oil pan is secured. It is considered that an auxiliary device having a relatively small load, such as a water pump or an oil pump, and a drive mechanism are arranged in the oil pan. In this case, as the accessory drive mechanism, for example, an accessory drive shaft that penetrates an oil pan is provided, and a power take-out gear is provided on the last web of the crankshaft, and the power take-out gear is connected to a transmission-side gear and a chain mechanism. Such a structure as to transmit the signal to the accessory drive shaft via the like is conceivable.
However, when arranging auxiliary equipment such as a water pump and an oil pump in the oil pan as described above, for example, the oil pump must be arranged so as to prevent oil leakage, or as much as possible with the same drive shaft. In order to be able to drive the auxiliary equipment,
For example, the water pump and the oil pump must be connected to the same drive shaft, and these accessories must not protrude from the recess of the oil pan part. There are various conditions that must not be increased, and how to configure the accessory mounting structure to satisfy all these conditions is an important issue in realizing a compact accessory arrangement. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. An oil pump is provided when a water pump and an oil pump are arranged at an oil pan and driven by the same auxiliary drive shaft. To prevent oil leakage, and
An object of the present invention is to prevent these auxiliary devices from protruding outward, and to minimize the number of bearing portions.

[0005]

SUMMARY OF THE INVENTION The present invention provides an engine output
The mission drive shaft is arranged parallel to the shaft, and the cylinder shaft is
When the cylinder head side is
Engine and tiger.
Install an oil pan at the bottom of the
Oil pump, water pump and other
Engine accessory mounting structure with engine accessories
Opposite the cylinder head side across the engine output shaft
Below the engine output shaft and the engine output shaft
On the side opposite to the transmission side across the perpendicular passing through
At the bottom of the engine, place the oil pan flat with the engine output shaft.
The auxiliary drive shaft is disposed so as to penetrate in the
A wall of the oil pan on one side of the engine output shaft on the drive shaft
The oil pump inside the oil pan across the
Dispose the water pump on the outside and attach it to the accessory drive shaft.
Connect these oil pumps and water pumps and
A power transmission mechanism to the auxiliary drive shaft is provided in the oil pan.
Installed on one end of the engine output shaft and the other engine accessory
From the oil pump and the water pump.
An auxiliary machine with a large dynamic load is arranged, and the auxiliary machine is connected to the oil pump.
Driven by the engine output shaft via a transmission belt
It is configured to operate . Large driving load
One of the accessories is a cylinder head with respect to the engine output shaft.
Above lateral side of the same engine output shaft, and a cylinder axis
The engine side opposite to the transmission side across
It is good to arrange on one side.

[0006]

[Function] The transmission drive shaft is parallel to the engine output shaft
The cylinder axis to the cylinder with respect to the vertical direction.
The tilt side is inclined in the direction that the pad side falls to the transmission side.
Oil at the bottom of the engine and transmission.
By installing a pan, the installation area of the oil pan
While ensuring sufficient oil pan volume
Auxiliary equipment and drive mechanism can be installed in the lupine area
It works. And it is an auxiliary machine with a relatively small driving load.
Use the same auxiliary drive shaft for the oil pump and water pump
To the oil pump and the water pump.
Swing the oil pump inside and outside the wall of the oil pan.
By dividing, the number of accessory drive shafts can be reduced ,
There is no need to provide a new bearing between these two accessories. And an oil pump is arranged inside the oil pan.
This ensures that oil leakage to the outside is prevented.
Is stopped. In addition, since two accessories are connected to the same end of the same accessory drive shaft ( the end of one end of the engine output shaft) , one of them is arranged inside the oil pan, The amount of extension of the auxiliary equipment to the outside of the engine can be reduced. Also, one end of the engine output shaft is relatively negative.
Water pumps and oil pumps, which are small-load accessories
The oil pan inside and outside with the oil pan wall in between
With the same accessory drive shaft that penetrates the oil pan.
The power transmission mechanism to the accessory drive shaft.
One end of the engine output shaft
The number of belt-driven accessories is reduced in
Simplifies the handling of other components, and makes
Using a tensioner or idler as the drive mechanism of the machine
Belt wrapping angle is large
Mobility is improved. In addition, the engine output shaft is
The drive shaft is arranged in parallel, and the cylinder axis is
And the cylinder head side falls to the transmission side
Tilting the engine to the engine output shaft.
Above the same engine output shaft as the Linda head,
On the transmission side with respect to the cylinder axis.
A space is created on the side of the opposite engine and driven in that space
Auxiliary equipment with a large load can be arranged, and the
Auxiliary machine driven via belt and auxiliary machine driven via belt
Use the engine tilt layout to be compact together
Yield was placed in a plurality of auxiliary parallel while improving belt driven
In addition, a compact arrangement of the drive mechanism can be realized.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial cross-sectional view of a horizontal engine for an automobile according to an embodiment of the present invention as viewed from the front end side (left side of the vehicle body). FIG. 2 is a view of the engine as viewed from the front side (front side of the vehicle body). FIG. 3 is a plan view of an assembly including an oil pan and an auxiliary device driving device in the engine, and FIG. 4 is a layout view of a front-end auxiliary device of the engine.

The engine 1 of this embodiment is an in-line four-cylinder engine and is mounted with a rear slant in which the crankshaft 2 is arranged in the front part of the vehicle body in the vehicle width direction. Further, transmissions 3 (transmissions) are arranged in parallel on the side of the engine 1 which is located rearward when viewed from the front of the vehicle body . In other words, the engine output shaft
Deployment drive shaft disposed parallel to the cylinder axis vertical way
Cylinder head side to transmission side
It is configured to tilt in the falling direction. An oil pan 4 having an integral structure is arranged below the engine 1 and the transmission 3. In addition, a surge tank 6 is provided on the front side of the engine 1 at a position close to the lower block 5 constituting the main body skirt portion, and an intake pipe 7 that communicates the surge tank 6 with the combustion chamber of each cylinder rises upward. It extends in a curved manner and is connected to the cylinder head 8.

[0010] The oil pan 4 is provided with the engine 1 and the transmission 3 by the fact that the engine 1 is set to the rear slant.
The lower block 5 is formed so as to fill a substantially triangular space formed below in a side view of the engine 1 in a longitudinal direction of the engine 1 from a position close to the clutch housing 9.
Is provided in a range from a front end of the first to a position retracted by a predetermined distance.

[0011] the oil pan 4, so as to penetrate the portion of the engine 1 side in a direction parallel to the crankshaft 2 (engine output shaft), i.e., across the crankshaft 2 cylinder
On the lower side of the crankshaft 2 opposite to the head 8 side,
And the transmission 3 side with the perpendicular passing through the crankshaft 2
At the bottom of the engine on the opposite side, attach the oil pan 4 to the crankshaft
An accessory drive shaft 10 is provided so as to penetrate in a direction parallel to 2 . At the rear end of the engine 1 and below the clutch housing 9, an oil pump (hereinafter, referred to as an AT oil pump) 11 for an automatic transmission (AT) is arranged close to the oil pan 4 and outside thereof. A power steering pump 12 is disposed, and the AT oil pump 11 and the power steering pump 12 are connected in series to an end of the accessory drive shaft 10. On the front end side of the oil pan 4, a water pump 13 is arranged in a recess formed below the lower block 5 and on the side of the oil pan 4, and is connected to the end of the accessory drive shaft 10. An oil pump (hereinafter simply referred to as an oil pump) 14 for engine lubrication is arranged inside the oil pan side wall on the side to which the water pump 13 is connected, and is connected to the accessory drive shaft 10. . That is, the oil on the accessory drive shaft 10
The wall of one end of the engine output shaft (crankshaft) of the pan 4
The oil pump 14 is located inside the oil pan 4
The water pump 13 is disposed on the auxiliary drive shaft 10.
These oil pump 14 and water pump 13 are connected
Have been.

A power transmission mechanism to the auxiliary drive shaft 10 is provided.
It is arranged in the oil pan 4. That is, the oil pan 4 has the partition wall 15 formed in a box shape at a position close to the side wall away from the oil pump 14. The auxiliary drive shaft 10 penetrates the partition wall 15 and the driven sprocket 1 is located at a position surrounded by the box-shaped partition wall 15.
6 are provided. The oil pan 4 is provided with an extended portion 15a of the partition 15 at a position closer to the rear end of the engine on the mission 3 side of the partition 15, and the shaft portion 18 of the idle gear 17 is rotated on the upper end surface thereof. A support member 19 for freely supporting is fixed. The idle gear 17 is disposed at a position facing the eighth web 20 on the rear end side of the crankshaft.
The drive-side sprocket 21 is fixed at a position facing the drive wheel 6.

The two sprockets 16, 21 on the driven side and the drive side are connected by a chain 22. The crankshaft 2 of the engine 1 has the eighth web 2
A power take-out gear 23 is provided at a portion 0, and the gear 23 and the idle gear 17 are configured to mesh with each other.

With this configuration, the power taken out of the power take-out gear 23 is transmitted to the idle gear 1
7, and further transmitted to the accessory drive shaft 10 via the driving sprocket 21, the chain 22, and the driven sprocket 16. Then, the AT oil pump 11, the power steering pump 12, the water pump 13, and the oil pump 14 connected to the accessory drive shaft 10 are driven. An oil filter 24 is attached to the front end side wall of the oil pan 4 from the outside. In the figure, reference numeral 27 denotes a sub-gallery for connecting the discharge port of the oil pump 14 to the suction port of the oil filter 24.

An oil pump is provided at one end of the engine output shaft.
Compensation with a larger driving load than the pump 14 and the water pump 13
Compressor 31 and alternator for air conditioner
33, and the compressor 31 and the alternator
The belt is driven outside the oil pan 4 with the motor 33
It is configured. That is, a compressor 31 for an air conditioner is disposed at a front end of the engine 1 behind the water pump 13, and a crank for driving auxiliary equipment is provided at an end of the crankshaft 2 above which the front end of the engine 1 projects. The pulley 32 is fixed. In addition, a position which is slightly symmetrical to the compressor 31 and located on the upper side of the crank pulley 32 and slightly offset to the front of the vehicle body (left side in FIG. 3) (the same crankshaft as the cylinder head 8 with respect to the crankshaft 2 ).
Above the shaft 2 and across the cylinder axis.
The alternator 33 is disposed on the side of the engine opposite to the side of the engine 3) . One belt 36 is wound around the drive pulleys 34 and 35 of the compressor 31 and the alternator 33 so as to be connected to the crank pulley 32. Also, a crank pulley 32 and a drive pulley 34 of the compressor 31
A pair of tensioners 37 and 38 are provided so as to sandwich the belt 36 from both sides, and an idler is provided between the crank pulley 32 and the drive pulley 35 of the alternator 33 so as to contact the belt 36 from below. 39 are provided. Thus, the tensioner 37,
With the arrangement of the idler 38 and the idler 39, the winding angle of the belt 36 around the respective drive pulleys 34 and 35 of the compressor 31 and the alternator 33 becomes large as shown in FIG. The belt 36 has two meshing portions.

A conventional belt-driven auxiliary device driving device is also known in which a plurality of auxiliary devices arranged at the front end or rear end of an engine are driven by the same belt. Is generally wound in a substantially triangular manner between the crank pulley and the drive pulleys of a plurality of accessories. However, when the belt is hung on such a triangle, if the load on the auxiliary equipment is large, there is a difference in the load applied to the belt between the tension side and the loose side, and the balance of tension is lost. When the rotation is increased, one of the tensions may be increased and slippage may occur. To cope with this, as described above, a tensioner is used to ensure that a sufficient wrapping angle is obtained for heavy accessories such as compressors, and two meshing parts are formed with the crank pulley to divide the tension. It is effective to do. However, in the conventional engine, since there are a large number of accessories that are arranged, for example, on the front end side of the engine and driven by the belt, the handling of the belt is complicated, and it is impossible to use many tensioners or the like in terms of space. On the other hand, in the case of the above-described embodiment, auxiliary equipment having a relatively small load, such as the water pump 13 and the oil pump 14, is disposed in the oil pan 4 and
Driven by an accessory drive shaft 10 that penetrates the
3 is driven by the belt at the front end of the engine.
It became possible to use the belts 7 and 38 and the idler 39.

In the above embodiment, the winding angle of the belt with respect to the alternator is adjusted by using one idler. For adjusting the winding angle, two idlers are provided with the belt interposed therebetween. You may.

[0018]

According to the present invention , the number of accessory drive shafts and the number of bearings between accessories are reduced.
And prevent oil leakage from the oil pump
And the water pump extends outward
Amount can be minimized, and the engine output shaft
Belt handling on the end side is simplified, and drive load is reduced.
Using a tensioner or idler for large auxiliary equipment
Belt drive with a large wrap angle is possible, and belt drive
The performance is improved. Auxiliary equipment driven via the auxiliary drive shaft
And accessories that are driven via belts
Use the layout to store both together compactly,
While improving volatility Con multiple accessory and drive mechanism
A compact arrangement can be realized.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a horizontal engine for an automobile according to an embodiment of the present invention, as viewed from a front end side (left side of a vehicle body).

FIG. 2 is a partial cross-sectional view of the engine as viewed from the front side (front of the vehicle body).

FIG. 3 is a plan view of an assembly including an oil pan and an accessory drive device in the engine.

FIG. 4 is a layout view of front-end auxiliary equipment of the engine.

[Description of Signs] 1 Engine 4 Oil pan 10 Auxiliary drive shaft 13 Water pump 14 Oil pump

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Junichi Okita 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Corporation (72) Yoshimichi Tanaka 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda (56) References JP-A-1-92512 (JP, A) JP-A-1-285624 (JP, A) JP-A-4-187828 (JP, A) JP-A-4-12134 (JP, A A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F02B 67/06 F01P 5/12

Claims (2)

(57) [Claims] 1. A transmission drive shaft with respect to an engine output shaft.
Are arranged in parallel, and the cylinder axis is
Head tilts toward the transmission.
Tilt it to the bottom of the engine and transmission.
An oil pan is provided, and an oil pump is provided at one end of the engine output shaft.
And the water pump and other engine accessories
In the engine accessory mounting structure, the engine is opposite to the cylinder head side with respect to the engine output shaft.
Below the engine output shaft and through the engine output shaft.
On the opposite side of the transmission
At the bottom of the gin, place the oil pan parallel to the engine output shaft.
Place the accessory drive shaft so as to penetrate in the direction, the oil pan of the engine output shaft one on the accessory drive shaft
The oil port is placed inside the oil pan with the end wall interposed therebetween.
The water pump on the outside, and
Connect these oil pumps and water pumps to the drive shaft.
And a power transmission mechanism to the auxiliary drive shaft is provided in the oil pan.
Installed on one end side of the engine output shaft as the other engine accessory
Drive load from the oil pump and the water pump
Auxiliary equipment with a large size is placed outside the oil pan.
Driven by the engine output shaft via the transmission belt
An engine accessory mounting structure characterized by having the above-described configuration . 2. A cylinder head for an engine output shaft.
Above the same engine output shaft and the cylinder axis
The engine side opposite to the transmission side across
On one side, one of the auxiliary equipment with a large driving load is arranged.
An accessory mounting structure for an engine according to claim 1.