JP3177519B2 - Vehicle powertrain structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power train structure for a vehicle, and more particularly to an improvement in a vehicle in which an engine is disposed horizontally.

[0002]

2. Description of the Related Art Conventionally, as a power train structure for a vehicle of this type, as disclosed in, for example, Japanese Patent Application Laid-Open No. 1-331330, a crankshaft of an engine is provided in an engine room at a front portion of a vehicle body in a vehicle width direction. together arranged transversely towards the front wheel side differential gear for the axis of the transmission to the rear of the vehicle body of the engine are arranged in parallel to be parallel to the crankshaft of the engine, more power from the speed change motor is transmitted It is known that these power trains are compactly shortened in the front-rear direction and in the width direction of the vehicle by disposing the power train behind the engine.

[0003] In the above-mentioned conventional motor, a clutch for transmitting power from the engine to the transmission is arranged at one end of a shaft of the transmission.

[0004]

However, in the above-mentioned prior art, since the large-diameter clutch is disposed at one end of the shaft of the transmission, the large-diameter clutch is disposed behind the engine when the large-diameter clutch is disposed behind the engine. Due to the presence of the clutch, the transmission cannot be arranged in contact with the rear surface of the engine, and an empty space is created between the two.Therefore, the position of the front wheel differential shifts to the rear of the engine by the amount of the empty space, and the engine is moved. As a result, the load acting on the front wheels becomes too large, so-called front heavy, and the length of the power train in the longitudinal direction of the vehicle body increases.

[0005] The present invention has been made in view of the above-mentioned point, and an object of the present invention is to provide a power train structure in which transmissions are arranged in parallel in the vehicle longitudinal direction of a horizontally mounted engine as described above. The transmission can be arranged in contact with the rear surface of the engine by appropriately changing the length of the power train in the longitudinal direction of the vehicle, and the differential for the front wheels can be arranged close to the engine.

[0006]

In order to achieve the above object, according to the invention of the present application, when a clutch or the like is arranged in a transmission that is arranged in parallel in the longitudinal direction of a vehicle body of a horizontally mounted engine, the clutch is used. And other shafts are closer than the input shaft of the transmission.
Away from the rank shaft, ie the input of the transmission
The shaft is in the longitudinal direction of the vehicle and the shaft
It is configured to be located in the middle of the shaft .

That is, a specific solution of the invention according to claim 1 is to provide an engine in an engine room at a front portion of a vehicle body.
With the crankshaft disposed transversely to face the vehicle width direction, the input shaft transmission on one side of the vehicle front-rear direction of the engine is parallel to the upper Chrysanthemum crankshafts
Uni parallel arrangement, further, the clutch or torque converter for transmitting power to the transmission from the engine, the premise power train structure of a vehicle disposed in the vehicle width direction on one side of the speed change device. The clutch or the torque converter has a power transmission shaft parallel to the crankshaft.
With one side of the engine in the vehicle longitudinal direction.
As well as viewed from the front and rear of the vehicle,
End of the vehicle width direction on one side of the clutch or torque converter is disposed so as not to protrude outward from the end portion in the vehicle width direction on one side of the engine, further, the speed change unit of the engine longitudinal direction of the vehicle body place in contact with one side, and the
An input shaft of the speed change device, the power transmission shaft of the clutch or torque converter for vehicle longitudinal direction and the crank Sha
It is arranged to be located at an intermediate position with the shaft .

According to the second aspect of the present invention, a crankshaft is provided in the engine room at the front of the vehicle body.
The transmission is arranged horizontally so as to face the vehicle width direction, and a transmission is arranged in parallel behind the engine so that its input shaft is parallel to the crankshaft of the engine, and power is transmitted from the engine to the transmission. Assuming a power train structure of a vehicle in which a transmitting clutch or torque converter is disposed on one side in the vehicle width direction of the transmission, the clutch or the torque converter is parallel to the crankshaft.
It has a power transmission shaft, and is behind the body of the engine.
Side-by-side, and from the vehicle front-back direction
Look, ends in the vehicle width direction on one side <br/> of the clutch or torque converter is disposed so as not to protrude outward from the end portion in the vehicle width direction on one side of the engine, further, the transmission It was placed in contact with the vehicle body rear side of the engine, and the shift
The input shaft of the machine is connected to the power transmission shaft of the clutch or torque converter in the longitudinal direction of the vehicle body and the crankshaft.
And a configuration arranged at an intermediate position between them.

Further, in the invention described in claim 3, the invention described in claim 2 is limited, and the engine and the upper part thereof are closed.
It is inclined so as to be located at the rear of the vehicle body from the rank shaft, and arranged so that the exhaust port is located at the rear side of the vehicle body,
An exhaust pipe connected to the exhaust port via an exhaust manifold passes through a space between the rear end of the transmission and the rear end of the clutch or torque converter when viewed from the side of the vehicle. The configuration to be arranged is specified.

[0010]

According to the above-mentioned structure, according to the first aspect of the present invention,
Since horizontal transmission to the engine are arranged in parallel on one side of the vehicle front-rear direction, correspondingly, the power train
The length in the vehicle width direction is reduced.

In this case, the input shaft of the transmission is connected to the front of the vehicle.
The movement of the clutch or torque converter in the rear direction
It is located at an intermediate position between the force transmission shaft and the crankshaft.
It has been, in other words, the axis of the clutch or torque converter to the one side of the vehicle front-rear direction relative to the input shaft of the transmission as viewed from the side of the vehicle, i.e. away from the crankshaft
The transmission can be easily arranged in contact with the side surface of the engine, so that there is no empty space between the transmission and the engine. As a result, the differential arranged on one side in the vehicle longitudinal direction of the engine can be arranged on the engine side by an amount corresponding to the available space, and the engine and the differential can be arranged close to each other.

Further, the end of the clutch or the torque converter on one side in the vehicle width direction does not protrude outward from the end on the one side in the vehicle width direction of the engine, that is, when the engine is viewed from the vehicle longitudinal direction. , The clutch and the like are arranged so as not to be located on the side of the vehicle, thereby further reducing the length of the power train in the vehicle width direction.

[0013] According to the second aspect of the present invention, the clutch or the torque converter is disposed behind the engine when viewed from the front side of the vehicle body, and the shaft of the clutch or the torque converter is disposed behind the input shaft of the transmission. Therefore, the transmission can be arranged in contact with the rear surface of the engine in the same manner as in the first aspect of the invention, and the clutch and the like do not protrude to the side of the engine (the vehicle width direction) when viewed from the vehicle front-rear direction. As a result, the length of the power train in the vehicle width direction can be made compact.

Furthermore, in the configuration of the invention of claim 1 and claim 2, wherein, as described above, by such the configuration described above, when viewed from the side of the vehicle, a wide empty space corresponding to the arrangement portion of the clutch or torque converter However, according to the third aspect of the present invention, since the exhaust port is located on the rear side of the vehicle body of the engine, the exhaust pipe connected to the exhaust port can be extended below the vehicle body through the empty space. The space can be used effectively.

[0015]

As described above, according to the power train structure for a vehicle according to the first aspect of the present invention, the transmission disposed on one side in the longitudinal direction of the vehicle body of the horizontally mounted engine has the following advantages.
When viewing the clutch or torque converter shaft from the side of the vehicle , move it away from the crankshaft rather than the transmission shaft.
The transmission can be arranged side by side in the vehicle longitudinal direction in contact with the front or rear surface of the engine, shortening the length of the power train in the vehicle longitudinal direction, and bringing the front wheel differential closer to the engine. Thus, it is possible to reduce power transmission loss and front heavy. In addition, the clutch or torque converter must be arranged so as not to protrude to the side of the engine
As a result , the power train can be shortened also in the vehicle width direction.

According to the second aspect of the invention, the same effects as those of the first aspect of the invention can be obtained when the transmission is arranged on the rear side of the vehicle body of the horizontal engine.

Furthermore, according to the third aspect of the present invention, the
The clutch or the torque converter according to claim 1 or 2 ,
It can be arranged in the exhaust pipe in the empty space in the engine room increases due to placement, effectively utilizing the space in the engine room.

[0018]

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

FIGS. 1 and 2 show a power train structure for a front wheel drive vehicle. In the figure, reference numeral 1 denotes a hood forming a part of a vehicle body, and 2 denotes a dash panel. The dash panel 2 forms an engine room 3 in a front portion of the vehicle body on the hood side, and a vehicle room 4 on the opposite side. It is formed.

In the engine room 3, a radiator 6 is arranged on the front side of the vehicle body, and an engine 7 is arranged behind it. The engine 7 has its crankshaft 8
Are arranged horizontally in the vehicle width direction.

Behind the body of the engine 7, two
A two-shaft transmission 12 having two shafts 12a and 12b;
A front-wheel-side differential 15 is disposed at a position obliquely rearward of the transmission 12 so as to be vertically positioned. Left and right front wheels W are connected to the differential 15 via a front axle (not shown in FIG. 1).

As shown in FIG. 1, the specific arrangement of the power trains is as follows.
The shaft center P3 of the lower shaft 12b of the transmission 12 is set at the rear of the vehicle body and at substantially the same height with respect to the shaft center P1, and the speed is shifted directly above the shaft center P3 of the lower shaft 12b. Machine 1
The axis P2 of the shaft 12a on the upper side of 2 is set. The axis P4 of the differential 15 is set on the rear side of the vehicle body and below the axis P3 of the lower shaft 12b of the transmission 12.

Also, as shown in FIG.
, A clutch 20 is arranged at a position behind the two shafts 12a, 12b behind the vehicle body. That is, the clutch 20 is supported by an intermediate shaft 12c which is located at a position behind the transmission 12 in the vehicle body and intermediate between the height positions of the two shafts 12a and 12b.

Then, as shown in FIG.
A drive sprocket 25 is rotatably connected to one end of the crankshaft 8, while a driven sprocket 26 is rotatably connected to an intermediate shaft 12c of the transmission 12 in which the clutch 20 is arranged. The chain 21 is wound between the two sprockets 25 and 26. The structure of the clutch 20 of the intermediate shaft 12c of the transmission 12 includes a support disk 20a rotatably connected to the intermediate shaft 12c, the support disk 20a disposed opposite to the support disk 20a, and the intermediate shaft 12c of the transmission 12. The clutch disk 20b includes a clutch disk 20b rotatably connected to another intermediate shaft 12d that is arranged in a straight line with the clutch disk 12c, and a pressure plate 20c for pressing the clutch disk 20b against the support disk 20a. A transmission gear 29 is arranged between the upper shaft 12a of the transmission 12 and the other intermediate shaft 12d, and power is transmitted from the intermediate shaft 12d to the upper shaft 12a via the transmission gear 29. . Therefore, when the clutch 20 is engaged, the power of the engine 7 is transferred from the crankshaft 8 to the upper shaft 12 of the transmission 12.
a when the clutch 20 is released, the transmission of the power is cut off.

The clutch 20, as shown in FIG.
The position of the right end face 20a is the right end face 7a of the engine 7.
And the clutch 20 is disposed so as to coincide with the position when viewed from the vehicle front-rear direction, and the entire clutch 20 is disposed behind the engine 7 when viewed from the vehicle front side.

Further, in FIG. 3, a transmission gear train 30 is disposed between the upper shaft 12a and the lower shaft 12b of the transmission 12. Also, the lower shaft 1 of the transmission 12
An output gear 31 is disposed at 2b, and the rotation of the output gear 31 is transmitted to the front wheel differential 15 of a bevel gear type. The power is divided right and left by the differential 15, and is transmitted to the left and right front wheels W via the left and right front axles 32a and 32b, respectively.

In addition, as shown in FIGS. 1 and 2, the engine 7 is arranged to be inclined rearward of the vehicle body, and an intake port 9 is provided on the front side of the vehicle body and an exhaust port 1 is provided on the rear side of the vehicle body.
0 is located. Exhaust port 1
An exhaust manifold 39 is connected to 0, and an exhaust pipe 40 is connected and connected to a collection portion of the exhaust manifold 39. As shown in FIG. 1, the exhaust pipe 40 extends obliquely downwardly of the vehicle body through the space of the clutch 20 behind the transmission 12, and then extends horizontally toward the rear of the vehicle body. An exhaust purification device 41 is interposed in the middle of the process.

On the other hand, a surge tank 43 is disposed in a space obliquely above the engine 7, and a plurality (four) independent intake passages 46 corresponding to each cylinder are provided at the front of the surge tank 43. Each of the independent intake passages 46 extends downwardly of the vehicle body and then bends backward to communicate with the intake port 9 of each cylinder of the engine 7.

In FIG. 1, reference numeral 47 denotes a fuel injection valve arranged in each independent intake passage 46. 1 and 2
Reference numeral 48 denotes a steering rack disposed behind the vehicle body of the differential 15. The steering rack 48 is connected to a steering wheel (not shown) in the vehicle interior 4 via a steering shaft 49 and a steering rod 50. Through the front wheel W.

Therefore, in the above embodiment, since the transmission 12 is arranged in parallel behind the vehicle body of the transverse engine 7, the length of the power train in the vehicle width direction is reduced.

[0031] In this case, the clutch 20 is not connected to the intermediate shaft 12c arranged in the rear of the vehicle body with respect to the upper shaft 12a and the lower shaft 12b of the transmission 12, to the upper shaft 12a
Since the transmission 20 is located behind the vehicle body of the transmission 12 as compared with the case where the transmission is connected , the transmission 20 can be disposed in contact with the rear surface of the engine 7, and the length of the power train in the vehicle longitudinal direction can be reduced. be able to. Further, since the differential 15 can be disposed in front of the vehicle body by that distance as compared with a case where there is an empty space between the engine and the transmission, the differential 15 can be disposed close to the engine 7 and the entire power train can be arranged. Can be further reduced in the longitudinal direction of the vehicle body. In addition, the power transmission path from the engine 7 to the front wheels W is shortened, power loss is reduced, and the load acting on the front wheels W is reduced, so that front heavy can be reduced.

Further, the shaft of the clutch 20 (the intermediate shaft 12)
c) is the input shaft (upper shaft 12) of the transmission 20 as described above.
on the relationship between which is located rearward of the vehicle body than a), the transmission 1
While placing 2 in contact with the rear surface of the engine 7, and the clutch 20 also it is arranged without a gap behind the engine 7,
A clutch 2 is provided beside the engine 7 when viewed from the front and rear of the vehicle body.
Since 0 is not located, the length of the power train in the vehicle width direction can also be reduced.

In addition, since the exhaust port 10 of the engine 7 is located on the rear side of the vehicle body and the exhaust pipe 40 is connected to the exhaust port 10, the exhaust pipe 40 is connected to the vehicle body as shown in FIG. After extending obliquely downward through a space corresponding to the position where the clutch 20 is located when viewed from the side, and then heading toward the rear of the vehicle body, an empty space corresponding to the position where the clutch 20 is disposed can be effectively used by the exhaust pipe 40.

In the above-described embodiment, the clutch 20 is used as an element for transmitting the power of the engine 7 to the transmission 12, but a torque converter may be used.

[Brief description of the drawings]

FIG. 1 is a side view of an arrangement position of a power train according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a skeleton diagram of a power train .

[Explanation of symbols]

 Reference Signs List 3 engine room 7 engine 10 exhaust port 12 transmission 15 differential W front wheel 20 clutch 40 exhaust pipe

Continuation of the front page (56) References JP-A-1-313630 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60K 17/04 F02B 61/06

Claims (3)

(57) [Claims] To 1. A vehicle body front portion of the engine room, the engine together are arranged transversely toward the crankshaft in the vehicle width direction, the transmission on the one side in the vehicle front-rear direction of the engine is the input shaft the is <br/> parallel arranged parallel to the upper chrysanthemum rank shaft, a clutch or torque converter for transmitting power to the transmission from the engine of the vehicle which is arranged in the vehicle width direction on one side of the speed-change apparatus In the power train structure, the clutch or the torque converter may include the crankshaft.
A power transmission shaft parallel to the shaft;
It is arranged so as to be in contact with one side in the front-rear direction.
The clutch or the torque converter when viewed from the front and back
End of the vehicle width direction on one side are arranged so as not to protrude outward from <br/> end portion in the vehicle width direction one side of the engine, the vehicle longitudinal direction on one side of the transmission the engine The input shaft of the transmission is connected to the power transmission shaft of the clutch or the torque converter in the longitudinal direction of the vehicle body and the crank.
A power train structure for a vehicle, wherein the power train structure is disposed at an intermediate position between the shaft and a shaft . To 2. A vehicle body front portion of the engine room, the engine is disposed transversely towards the crankshaft in the vehicle width direction Rutotomoni, the vehicle body rear side of the engine, transmission their
The input shaft is parallel to the crankshaft of the engine
Are arranged parallel Te, clutch or torque converter for transmitting power to the transmission from the engine, the power train structure of a vehicle which is arranged in the vehicle width direction on one side of the speed change device, the clutch or torque converter, the Kurankushi
A power transmission shaft parallel to the shaft;
It is arranged so as to be in contact with the rear side, and the front and rear of the vehicle body
Viewed from direction, the end portion in the vehicle width direction on one side of the clutch or torque converter is disposed so as not to protrude outward from the end portion in the vehicle width direction on one side of the engine body of the transmission engine The input shaft of the transmission is disposed so as to be in contact with the rear side, and the power transmission shaft of the clutch or the torque converter and the crank are connected in the vehicle longitudinal direction.
A power train structure for a vehicle, wherein the power train structure is disposed at an intermediate position between the shaft and a shaft . 3. The engine has a crankshaft at its upper part.
The exhaust pipe is disposed so as to be inclined so as to be located on the rear side of the vehicle body with respect to the vehicle body and the exhaust port is located on the rear side of the vehicle body, and an exhaust pipe connected to the exhaust port via an exhaust manifold is viewed from the side of the vehicle body, 3. The power train structure for a vehicle according to claim 2, wherein the power train structure is arranged to pass through a space between a rear end of the transmission and the clutch or the torque converter.