JPH07223449A - Power train structure of vehicle - Google Patents

Abstract

PURPOSE:To make car body weight well-balanced longitudinally for a lower center of gravity by providing a clutch on the side of a transmission in a power train structure in which an engine and the transmission are arranged separately in the front and rear of the vehicle interior. CONSTITUTION:An engine 1 is disposed at the front of the vehicle cabin P and a propeller shaft 2 connected to the output shaft of the engine at its front end via a universal joint 2A is passed through a tunnel portion PT with the rear of the shaft 2 extending upwards, the tunnel portion PT being formed in the lower portion of the vehicle cabin P along the longitudinal direction of the vehicle body. A vertically mounted clutch 3, having an input shaft higher than the output shaft of the engine 1 with the rear end of the propeller shaft 2 connected to the clutch via a universal joint 2B, is provided in the rear of the vehicle interior P and connected to a transversely mounted transmission 4 and to a differential 5 from the output shaft, and large space can be formed above them. This constitution enables installation of a fuel tank and effective use of space while reducing the length of the vehicle body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powertrain structure including an engine and a transmission, and more particularly to a vehicle powertrain structure suitable for a powertrain in which an engine and a transmission are separately arranged in front and rear of a vehicle compartment.

[0002]

2. Description of the Related Art Conventionally, in an automobile, a power train including an engine and a transmission has a type in which the engine and the transmission are collectively installed in a front or rear portion of a passenger compartment or an engine compartment formed in a lower portion of the passenger compartment. However, in order to improve the weight balance in the front-rear direction of the vehicle, a heavy engine and transmission are placed separately in the front and rear of the passenger compartment, or in the front or rear and the lower portion of the passenger compartment. The format used is set up. For example, in the one disclosed in Japanese Unexamined Patent Publication No. 5-85204, an engine and a clutch provided at the rear of the engine are separately arranged in the front part of the vehicle compartment and a transmission is arranged at the rear part of the vehicle compartment, and are formed in the rear part of the clutch. After that, a transmission gear mechanism is provided in the bulging portion downward to transmit power from the clutch output shaft to the output shaft, and the output shaft is connected to the transmission input shaft. Also, for example, Japanese Patent Laid-Open No. 5-85203
In the one disclosed in the publication, two engines and transmissions and two fuel tanks for supplying fuel to the two engines are arranged in the rear part of the vehicle compartment, and at least one fuel tank is provided for the engine. It is located above.

[0003]

However, in the above-described conventional vehicle powertrain structure, the former has a large clutch diameter and its lower end projects below the lower end of the engine. The limit height will be limited by the height of the lower end of the clutch from the ground,
It is required to reduce the vehicle height in recent years, especially to lower the bonnet and to lower the center of gravity, but in order to secure the distance between the upper end of the engine and the lower end of the clutch, As it becomes difficult to realize a low bonnet,
There is a problem that it becomes difficult to lower the center of gravity sufficiently. Further, the latter has a problem that it is difficult to increase the capacity of the fuel tank because the space formed above the engine is small.

An object of the present invention is a structure of a power train in which an engine and a transmission are separated from each other in the front and rear of a vehicle compartment to improve the balance of the weight of the vehicle body in the front-rear direction and promote a lower center of gravity. Another object of the present invention is to provide a vehicle powertrain structure capable of reducing the length in the front-rear direction and increasing the capacity of the fuel tank.

[0005]

In order to achieve the above object, a vehicle powertrain structure of the present invention is a powertrain structure in which an engine and a transmission are separated from each other in the front and rear of a vehicle compartment, and a clutch is a transmission. By providing it on the side, the front-rear direction balance of the vehicle can be improved. In the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is provided on the transmission side and the clutch input shaft is provided at a position higher than the engine output shaft so that Of the engine, the height of the lower end of the engine can be made substantially equal to the height of the lower end of the clutch, and the lowering of the center of gravity can be promoted. Further, in the structure of the power train in which the engine and the transmission are separately arranged in the front and rear of the vehicle compartment, the clutch is provided on the transmission side, the clutch is placed vertically, and the transmission is placed horizontally, so that It is possible to improve the balance and prevent an increase in the length of the transmission installation space in the vertical direction, that is, the vehicle front-back direction. Also, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is installed on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the differential device is installed below the transmission. By doing so, the front-rear direction balance of the vehicle is improved, and the differential device and the transmission can be installed in the space formed by the clutch outer diameter in front of or behind the clutch. Further, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is provided on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the fuel tank is installed above the transmission. As a result, the front-rear direction balance of the vehicle can be improved, and the installation space for the fuel tank, which requires a large capacity, can be secured, the front-rear length of the vehicle body can be shortened, and the crash space can be secured. Also, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is provided on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the differential device and the transmission are arranged in parallel in the front and rear. By installing them, the center of gravity can be lowered, a large space can be secured above the transmission, and a large-capacity fuel tank can be installed. Also, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is installed on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the differential device is installed below the transmission. By doing so, the front-rear direction balance of the vehicle is improved, and by installing the fuel tank above the transmission, the front-rear direction balance of the vehicle is improved and the vehicle body front-rear length can be shortened. In addition, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, a clutch is provided on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the differential device and the transmission are installed in the front and rear of the vehicle body. By arranging them side by side in the same direction, the front-rear direction of the vehicle can be well balanced and the center of gravity can be promoted, and by installing the fuel tank above the transmission, the installation space of the fuel tank can be expanded. You can Also, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is provided on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the differential device and the transmission are arranged in parallel in the front and rear. The fuel tank is installed above the transmission, and auxiliary equipment is installed below the fuel tank on the side of the transmission to improve the balance in the front-rear direction of the vehicle. A space for installing auxiliary equipment can be secured, and the front-rear length of the vehicle body can be further shortened. Also, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is provided on the transmission side, the clutch is installed vertically, the transmission is installed horizontally, and the differential device and the transmission are arranged in parallel in the front and rear. The fuel tank is installed above the transmission, and a cross member is provided on the side of the transmission below the fuel tank to improve the balance in the front-rear direction of the vehicle and save the installation space of the fuel tank. It can be secured, the front-rear length of the vehicle can be further shortened,
The cross member can be compactly arranged. In addition, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, by installing the clutch behind the transmission, the balance in the front-rear direction of the vehicle is improved and a clutch with a large outer diameter is installed. It is possible to reduce the interference of the clutch with the vehicle compartment by moving away from the vehicle compartment. In addition, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, a clutch is installed in the rear of the transmission and a spare tire is arranged around the clutch to balance the vehicle in the front-rear direction. To reduce the interference of the clutch with the passenger compartment,
Can store spare tires compactly. In addition, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is installed in the rear of the transmission, the differential and the transmission are arranged in the upper and lower parts, and a spare is placed around the clutch and the transmission. By disposing the tires, the front-rear direction balance of the vehicle is improved, interference of the clutch with the vehicle interior is reduced, and the spare tires can be compactly housed in the up-down direction. Also, in the structure of the powertrain in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch should be installed behind the transmission, the auxiliary machine should be installed behind the clutch, and the spare tire should be installed around it. As a result, the front-rear direction balance of the vehicle can be improved, the interference of the clutch with the passenger compartment can be reduced, and the interference between the auxiliary machine and the spare tire can be reduced. In addition, in the structure of the power train in which the engine and the transmission are separated from each other in the front and rear of the vehicle compartment, the clutch is installed in front of the transmission so as to project between the left and right seats to balance the vehicle in the front-rear direction. Good, and it is possible to reduce the interference of the clutch with the occupant. Further, in the structure of the power train in which the engine and the transmission are separated from each other, by installing the clutch at a position below the seat, it is possible to secure an installation space for the clutch and shorten the front-rear length of the vehicle.
Further, in the structure of the power train in which the engine and the transmission are separated from each other, by installing the clutch at a position below the front end of the seat, it is possible to secure the installation space for the clutch and reduce the interference of the clutch with the occupant. At the same time, it is possible to prevent an increase in ground clearance of the vehicle body and promote a lower center of gravity. Further, by disposing the transmission below the cross member, and having a large cross section of the cross member and storing the spare tire in the cross member, a storage space for the spare tire can be secured and the rigidity of the vehicle body is increased. be able to.
Further, the transmission is arranged below the cross member, the cross-section of the cross member is set to a large cross section, and the spare tire is housed in the cross member. A space can be secured, the rigidity of the vehicle body can be increased, and a large space above the differential device and the transmission can be secured. In addition, the transmission is arranged below the cross member, the cross member has a large cross section, and the spare tire is housed in the cross member. The space can be secured, the rigidity of the vehicle body can be increased, and the longitudinal length of the vehicle body can be shortened. Further, the transmission is arranged below the cross member, the cross member has a large cross section, the spare tire is housed in the cross member, and the fuel tank is provided above the cross member. And the rigidity of the vehicle body can be increased, and the cross member can protect the fuel tank from an impact from the rear.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. While the engine 1 is arranged on the front side of the passenger compartment P,
A propeller shaft 2 whose front end is connected to an output shaft of the engine 1 through a universal joint 2A penetrates in a vehicle body front-rear direction through a tunnel portion PT formed in a lower portion of a vehicle compartment P in a vehicle body front-rear direction and extends rearwardly. It is set up. An input shaft positioned higher than the output shaft of the engine 1 is provided on the rear side of the passenger compartment P,
A vertical clutch 3 having a rear end of a propeller shaft 2 connected to the input shaft via a universal joint 2B, and an output shaft of the clutch 3 are connected so that the horizontal position, that is, the input / output shaft is in the vehicle width direction, that is, the horizontal direction. The horizontal transmission 4 that extends and is arranged behind the clutch 3, and the horizontal transmission 4
And a fuel tank 6 arranged behind the horizontal transmission 4 and the differential 5 and connected to the output shaft of the horizontal transmission 4.
And a spare tire 15 disposed above the fuel tank 6, the differential device 5 includes the tire T via the axle.
Are linked to. The clutch 3 according to the present invention
Includes a fluid coupling and a torque converter,
While the clutch 3 is located immediately in front of the differential device 5,
Although the horizontal transmission 4 is located behind the clutch 3 and above the differential device 5, the horizontal transmission 4 and the differential device 5 may be installed in front of the clutch 3. Further, the engine 1 is installed in a forward descent posture.

An example of the drive system in this embodiment will be described with reference to FIGS. 2a to 2c. The clutch 3 includes an input shaft 31 connected to the rear end of the propeller shaft 2 and an output shaft 32. The output shaft 32 includes the spur gear transmission mechanism 10 and the bevel gear transmission mechanism.
The output shaft 42 extending in the lateral direction of the horizontal transmission 4 is connected to the input shaft 41 extending in the lateral direction of the horizontal transmission 4 via the differential gear 5 installed in the rear axle 13 via the final gear 12. It is connected.

According to this structure, the engine 1 and the transmission 4, which are heavy in weight, are arranged separately in the front and rear of the passenger compartment P, so that the front-rear direction balance of the vehicle can be improved. Further, since the engine 1 is arranged on the front side of the passenger compartment P and the clutch 3 is arranged on the rear side of the passenger compartment P, that is, on the transmission 4 side, the engine is placed on the ground height limit line HL which is the minimum height of the lower surface of the vehicle body from the road surface GL. It is possible to position the lower end (the front lower end in this embodiment) which is the lowest part of No. 1 and to raise the installation position of the clutch 3 by arranging the propeller shaft 2 in the rearward rising position. The lower end of the engine can be reasonably positioned on the ground height limit line HL, and the height of the lower end of the engine 1 and the height of the lower end of the clutch 3 can be made to substantially coincide with each other and positioned on the ground height limit line HL.
The lower surface of the vehicle body can be lowered to lower the ground height, and the upper end position of the engine 1 can be lowered to lower the vehicle height, which can promote lowering of the center of gravity. Further, by horizontally placing the transmission 4, it is possible to prevent an increase in the length of the installation space of the transmission 4 in the vertical direction, that is, the vehicle front-rear direction. Also, the clutch 3 is installed vertically and the transmission 4
Is installed horizontally and the differential 5 is installed below the transmission 4, so that the differential 5 can be installed in a space formed by the outer diameter of the clutch 3 behind or in front of the clutch 3.
And transmission 4 can be installed.

A second embodiment will be described with reference to FIGS. 3 and 4. As in the first embodiment, an engine is arranged on the front side of the vehicle compartment, and a clutch and a transmission are arranged on the rear side of the vehicle compartment. In the rear of the vehicle compartment P, side frames are extended on both sides of the vehicle body. A pair of rear side frames 7 that rise from a lower side to a predetermined height and extend rearward of the vehicle body are provided, and both ends are connected to the rear side frames 7 on both sides, and a rear cross member 8 extends in the vehicle width direction.
Is provided. A support bracket 81 is provided at an appropriate position of the rear cross member 8, the horizontal transmission 4 is supported by the support bracket 81, the differential device 5 is installed below the horizontal transmission 4, and the main silencer 9 is attached to the rear cross member. It is arranged below 8 in a horizontal orientation. Between the rear side frames 7 on both sides,
A horizontally long fuel tank 6 is arranged above the horizontal transmission 4.

According to this structure, it is possible to secure a space for installing a fuel tank which requires a large capacity, and to lengthen the fuel tank 6 in the lateral direction to shorten the front-rear length of the vehicle body. It is possible to secure a crash space from.

A third embodiment will be described with reference to FIGS. 5 and 6. As in the first embodiment, the engine is arranged on the front side of the vehicle compartment, and the clutch and the transmission are arranged on the rear side of the vehicle compartment. The stationary transmission 4 is arranged in parallel, the clutch 3A is arranged behind the laterally arranged transmission 4, and the fuel tank 6 is arranged above the laterally arranged transmission 4 and the differential device 5. The clutch 3A is an input / output shaft. 30A is provided so as to project to the front side of the vehicle body. At the rear edge of the rear cross member 8 whose both ends are joined to the rear side frames 7 on both sides of the vehicle body, a substantially dish-shaped tire supporting portion 8A protruding rearward is provided.
The clutch 3A is housed in A, and the spare tire 15 is supported by fitting the recess of the rim of the spare tire 15 into the outer periphery of the tire support portion 8A that covers the outer periphery of the rear portion of the clutch 3A.
A pre-silencer 9A connected to the exhaust pipe 90 is laterally arranged below the horizontal transmission 4, and a main silencer 9B connected to the pre-silencer 9A is installed below the rear side frame 7 in a rearwardly upward direction. In this embodiment, the spare tire 15 is a tempered tire with a small installation space, but the spare tire 15 is not limited to this.

A spur gear 14A provided at the rear end of the propeller shaft 2, a spur gear 14B provided at the front end of the input shaft 31A of the clutch 3A, and a spur gear 14A and an intermediate gear 14C meshing with the spur gear 14B. The first transmission mechanism 14 is formed,
The central axis of the input / output shaft 30A is arranged parallel to the central axis of the propeller shaft 2 while being shifted upward.

An example of the drive system of this embodiment shown in FIG. 7 will be described. The input / output shaft 30A of the clutch 3A is formed by concentrically forming an input shaft 31A formed of an outer cylindrical body and an output shaft 32A formed of an inner cylindrical body or a solid rod body. The first transmission mechanism 14 is a spur gear 14A at the rear end of the propeller shaft 2.
And a spur gear 14A at the front end of the input shaft 31A of the clutch 3A meshes with each other via an intermediate gear 14C, and a spur gear 16A provided at the front end of the output shaft 32A of the clutch 3A.
A spur gear 16B meshing with the spur gear 16A, an intermediate shaft 16C having the spur gear 16B at one end, a bevel gear 16D provided at the other end of the intermediate shaft 16C, and an input shaft 41 of the horizontal transmission 4. The second transmission mechanism 16 is formed by the bevel gear 16E provided at the tip and meshing with the bevel gear 16D, and the output shaft 42 of the horizontal transmission 4 is a differential device installed in the rear axle 13 via the final gear 12. It is connected to 5.

With this configuration, a large space can be formed above the differential device 5 and the horizontal transmission 4, a large-capacity fuel tank can be installed in this space, and the longitudinal length of the vehicle body can be shortened. be able to. Further, the propeller shaft 2 can be extended substantially horizontally in the front-rear direction of the vehicle body, and the height of the tunnel portion PT formed in the vehicle interior P can be reduced, and
The position of the clutch 3A can be sufficiently raised behind the vehicle compartment P. In addition, use the spare tire 15 on the rear of the clutch 3A.
Since the recess of the rim is fitted and the spare tire 15 is supported, the space can be effectively used, a rear space for forming a trunk room and the like can be secured, and the longitudinal length of the vehicle body can be shortened.

A fourth embodiment will be described with reference to FIGS. 8 and 9. An engine is arranged on the front side of the vehicle compartment and a clutch and a transmission are arranged on the rear side of the vehicle compartment as in the first embodiment, and the engine is placed horizontally above the differential device 5 behind the vehicle compartment. The transmission 4 is arranged, the differential device 5 and the longitudinally placed clutch 3 are arranged behind the horizontally placed transmission 4, and the spare tire pan 17 is provided on the rear floor above the horizontally placed transmission 4 and the clutch 3. Spare tires on 17 15
Is placed. The spare tire pan 17 is formed with a tire holding member 171 composed of a short cylindrical projection with a bottom protruding upward, and the recessed portion of the rim of the spare tire 15 is a tire holding member.
The spare tire 15 is supported by being fitted to the tire 171, and the upper ends of the horizontal transmission 4 and the clutch 3 are inserted into the space of the tire holding member 171. Although the clutch 3 is arranged behind the differential device 5 and the horizontal transmission 4 in the illustrated embodiment, the clutch 3 may be arranged in front of the differential device 5 and the horizontal transmission 4.

According to this structure, since the upper ends of the horizontal transmission 4 and the clutch 3 are inserted into the space of the tire holding member 171, the horizontal transmission 4 and the horizontal transmission 4 and 4 are inserted into the dead space of the recess formed in the rim of the spare tire 15. By accommodating the upper end of the clutch 3, the space can be effectively used and the height of the rear floor can be reduced.

A fifth embodiment will be described with reference to FIGS. 10 to 12. As in the first embodiment, the engine is arranged on the front side of the vehicle compartment, and the clutch and the transmission are arranged on the rear side of the vehicle compartment. Place the stationary transmission 4,
A vertical clutch 3B is arranged behind the differential device 5 and the horizontal transmission 4, and auxiliary devices such as an alternator 18, an air conditioner 19, and a hydraulic device 20 are arranged behind the clutch 3B. At the rear edge of the rear cross member 8 whose both ends are joined to the rear side frames 7 on both sides of the vehicle body, a spare tire pan 18 having a tire support portion 181 with a bottomed short cylindrical shape protruding rearward is vertically provided, and a spare tire is provided. The spare rim 15 is vertically supported by fitting the recess of the rim of the rim 15 to the outer periphery of the tire support part 820, and the alternator 18, the air conditioner 19, the hydraulic device 20, etc. are installed in the recess of the tire support part 820. The auxiliary equipment of is stored. Drive pulley 33 on the rear surface of the clutch 3B
B is projected, and driven pulleys 181, 191, 201 are projected on the front surfaces of the alternator 18, the air conditioner 19, and the hydraulic device 20, respectively, and a transmission belt 22 is wound around the drive pulley 33B, the driven pulleys 181, 191, 201, and the idler 21. (Fig. 1
2). Clutch 3B and horizontal transmission 4
And the rear side members 7, 7 on both sides above the differential device 5.
A fuel tank 61 including a horizontal tank portion 61A extending substantially between the two and a vertical tank portion 61B extending downward from at least one end of the horizontal tank portion 61A so as to surround the clutch 3B is provided.

The drive system of this embodiment will be described with reference to FIG. The input / output shaft 30B of the clutch 3B is formed by concentrically forming an input shaft 31B made of an inner tubular body or a solid rod and an output shaft 32B made of an outer tubular body, and A drive pulley 33B is provided with the end protruding to the rear surface of the clutch 3B, and the front end of the input shaft 31A is connected to the rear end of the propeller shaft 2. Output shaft 32B of clutch 3B
The bevel gear 321 provided at the front end of the horizontal transmission 4 and the bevel gear 411 provided at the tip of the input shaft 41 of the horizontal transmission 4 mesh with each other, and the output shaft 42 of the horizontal transmission 4
Is connected via a final gear 12 to a differential device 5 installed on a rear axle 13.

According to the above construction, auxiliary devices such as the alternator 18, the air conditioner 19 and the hydraulic equipment 20 are arranged facing the clutch 3B and arranged in the dead space formed by the recess of the rim of the spare tire 15. The space can be increased, and the periphery of the clutch 3B can be efficiently used as an installation space for the fuel tank 61, and the volume of the fuel tank 61 can be increased.

A sixth embodiment will be described with reference to FIGS. 14 and 15. A clutch 3C is provided at a front position of the differential device 5, and a bulging portion 24 formed so as to project into the vehicle compartment P is formed at a substantially central lower portion of a bulkhead 23 forming a rear end of the vehicle compartment P. The clutch 3C is provided in the bulged portion 24. It should be noted that the flywheel and starter gear (not shown) in the clutch 3C are located at the rear side, or the clutch housing is provided in the opposite direction to the front, so that the small diameter side of the housing of the clutch 3C is forward and the large diameter side is The bulging portion 24 is formed rearward, and is tapered toward the inside of the passenger compartment P, and is located between the seats on both sides near the waist of the occupant A. The differential device 5 is arranged in the vicinity of the rear of the clutch 3C, and the horizontal transmission 4 is arranged immediately after that.

In the rear of the passenger compartment P, side frames 70 are extended on both sides of the vehicle body, and a pair of rear side frames 7 are provided which extend from below to a predetermined height along the bulkhead 23 and extend rearward of the vehicle body. The front side of the rear side frame 7, the rear side frame 7 with both ends on both sides,
Wide rear cross member connected to 7 and extending laterally
80 is provided, and the fuel tank 6 is provided on the rear cross member 80.
Is provided. The rear cross member 80 has an inner dimension in the vertical direction which is equal to or larger than the width of the spare tire 15 and has a large width in the front-rear direction to have a large cross section, and a spare tire storage portion 801 which is further widened is formed near the center. , The spare tire storage unit 801 stores the spare tire 15, and the front end of the spare tire storage unit 801 matches the bulkhead 23 and the front surface of the rear cross member 80 and has a lateral width at least larger than the diameter of the spare tire 15. The opening that it has is provided as a spare tire outlet 802, and a closing plate 803 is provided at the spare tire outlet 802 so as to be openable and closable. The length of the fuel tank 6 in the front-rear direction is substantially equal to or smaller than the width of the rear cross member 80 in the front-rear direction.

According to the above structure, the spare tire 15 is housed in the rear cross member 80, so that the spare tire housing space can be efficiently secured, and the rear cross member 80 has a large cross section to increase the rigidity of the vehicle body. Can be made. Further, since the fuel tank 6 is provided on the rear cross member 80 having a large width in the front-rear direction, it is possible to easily secure a large-capacity fuel tank installation space, and also to secure a large-capacity fuel tank from the rear when a rear-end collision occurs. The spare tire 15 protects the fuel tank 6 against an impact, and the influence on the fuel tank 6 can be reduced. Further, by installing the clutch 3C so as to project in the passenger compartment P, the front-rear length of the entire power train can be shortened, the front-rear length of the vehicle body can be shortened, and the differential device 5 and the horizontal transmission 4 can be shortened. It is possible to secure a space behind.

A seventh embodiment will be described with reference to FIGS. The clutch 3 is arranged in the lower portion of the vehicle compartment P, and the clutch 3 connected to the rear end of the propeller shaft 2 in the vehicle compartment P is located between the seats on both sides, and the lower portion of the seat (in this embodiment, the seat It is installed at the front end position), the clutch 3 overlaps with the front end of the seat when viewed from the side, and the maximum diameter part is located slightly behind the knee position of the seated occupant (see FIG. 16). Although the maximum diameter portion of the clutch 3 slightly overlaps the side position B of the body of the vehicle (see FIG. 17), it is near the highest position of the occupant's legs, and the clutch 3 is located on the lower part of both sides. Therefore, there is no fear of disturbing the occupants. Behind the passenger compartment P, that is, behind the bulkhead 23, there are arranged a laterally-positioned transmission 4 arranged on one side from the center and a differential device 5 connected to a rear axle. The stationary transmission 4 is connected. The clutch 3 is housed in an enlarged portion 26 formed in the middle of the tunnel portion PT, and the fuel tank 6A is located below the seat in the lower tank 61A extending in the entire vehicle width direction and behind the bulkhead 23. , The horizontal transmission 4 and the rear tank 62A standing upright to the side of the differential device 5. 27 is a cross member.

With this structure, since the clutch 3 is arranged in the lower portion of the vehicle compartment P, a space behind the vehicle compartment P can be secured, the front-rear length of the vehicle body can be shortened, and the weight distribution of the vehicle body can be efficiently performed. The balance between the front and rear of the car body is improved. Further, by disposing the fuel tank below the seat and on the lateral side of the transmission 4 and the differential device 5, a large-capacity fuel tank can be easily installed.

[0025]

Since the present invention is constructed as described above, it has the following effects. In the structure of the power train in which the engine and the transmission are separately arranged in the front and rear of the vehicle compartment, by providing the clutch on the transmission side, the front-rear direction balance of the vehicle can be improved. Further, by providing the clutch input shaft at a position higher than the engine output shaft, it is possible to improve the front-rear direction balance of the vehicle and substantially match the height of the lower end of the engine with the height of the lower end of the clutch. The lowering of the center of gravity can be promoted. Further, by arranging the clutch vertically and arranging the transmission horizontally, it is possible to improve the balance in the front-rear direction of the vehicle and prevent an increase in the longitudinal length of the installation space of the transmission, that is, the vehicle front-rear direction. Also, by installing the differential device below the transmission, the front-rear direction balance of the vehicle is improved, and the differential device and the transmission can be installed in the space formed by the clutch outer diameter in front of or behind the clutch.
In addition, the differential is installed under the transmission,
By installing the fuel tank above the transmission, the front-rear direction balance of the vehicle can be improved, the front-rear length of the vehicle body can be shortened, and a crash space can be secured. Further, by installing the differential device and the transmission in parallel in the front and rear, the center of gravity can be lowered, a large space can be secured above the transmission, and a large-capacity fuel tank can be installed. In addition, by installing the differential and the transmission in parallel in the front and rear, and by installing the fuel tank above the transmission, the balance in the front-rear direction of the vehicle is improved and the installation space of the fuel tank that requires a large capacity is installed. Can be secured and the front-rear length of the vehicle body can be shortened. Further, by installing the differential device and the transmission side by side in the longitudinal direction of the vehicle body, it is possible to improve the balance in the longitudinal direction of the vehicle, promote a low center of gravity, and install a fuel tank above the transmission. Thereby, the installation space of the fuel tank can be expanded. In addition, by installing the differential device and the transmission in parallel in the front and rear, installing the fuel tank above the transmission, and installing the auxiliary machine below the fuel tank on the side of the transmission,
The front-rear length of the vehicle can be made good, the installation space for the fuel tank and the auxiliary machinery can be secured, and the front-rear length of the vehicle can be further shortened. In addition, the differential device and the transmission are installed side by side in front and rear, the fuel tank is installed above the transmission, and the cross member is provided on the side of the transmission and below the fuel tank, so that the front and rear direction of the vehicle can be improved. Good balance,
A space for installing the fuel tank can be secured, the longitudinal length of the vehicle body can be further shortened, and the cross member can be compactly arranged. Further, by installing the clutch behind the transmission, the balance in the front-rear direction of the vehicle can be improved, the clutch having a large outer diameter can be moved away from the vehicle interior, and the interference of the clutch with the vehicle interior can be reduced. Also, by installing the clutch behind the transmission and arranging the spare tire around the clutch, the front-rear direction balance of the vehicle is improved, interference of the clutch with the passenger compartment is reduced, and the spare tire is made compact. Can be stored. Also, by installing the clutch behind the transmission, arranging the differential and transmission up and down, and arranging spare tires around the clutch and transmission, the front-rear direction balance of the vehicle is improved and the clutch cabin is improved. The spare tire can be compactly stored in the up-down direction. In addition, the clutch is installed behind the transmission and the auxiliary machine is installed behind the clutch.
By arranging the spare tire around it, it is possible to improve the balance in the front-rear direction of the vehicle, reduce the interference of the clutch with the passenger compartment, and reduce the interference between the auxiliary machine and the spare tire. Further, by installing the clutch in front of the transmission so as to project between the left and right seats, it is possible to improve the balance in the front-rear direction of the vehicle and reduce the interference of the clutch with the occupant. Further, by installing the clutch at the lower position of the seat, it is possible to secure a space for installing the clutch and shorten the front-rear length of the vehicle. In particular, by installing the clutch at a position below the front end of the seat, a space for installing the clutch can be secured, interference of the clutch with an occupant can be reduced, an increase in vehicle ground clearance can be prevented, and a low center of gravity can be promoted. . Further, the transmission is arranged below the cross member, and the cross-section of the cross member has a large cross section, and the spare tire is stored in the cross member. Therefore, the storage space for the spare tire can be secured and the rigidity of the vehicle body can be increased. be able to. Further, the cross member has a large cross section, and the spare tire is housed in the cross member, and the differential device and the transmission are arranged in parallel in the front and rear, whereby a storage space for the spare tire can be secured and the rigidity of the vehicle body is increased. Therefore, a large space above the differential device and the transmission can be secured. In addition, the cross-section of the cross member has a large cross section, and the spare tire is housed in the cross member, and the clutch is provided so as to project from the interior of the vehicle. It is possible to reduce the front-rear length of the vehicle body. In addition, the cross section of the cross member is a large cross section, and spare tires are stored in the cross member,
By providing the fuel tank above the cross member,
A storage space for the spare tire can be secured, the rigidity of the vehicle body can be increased, and the cross member can protect the fuel tank from a rear impact.

[Brief description of drawings]

FIG. 1 is a layout view showing a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a drive system according to a first embodiment of the present invention.

FIG. 3 is a bottom view showing a second embodiment of the present invention.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a bottom view showing a third embodiment of the present invention.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is an explanatory diagram showing an example of a drive system according to a third embodiment of the present invention.

FIG. 8 is a sectional view showing a fourth embodiment of the present invention.

FIG. 9 is a plan view showing a fourth embodiment of the present invention.

FIG. 10 is a side view showing a fifth embodiment of the present invention.

FIG. 11 is a bottom view showing the fifth embodiment of the present invention.

FIG. 12 is a layout view of pulleys according to a fifth embodiment of the present invention.

FIG. 13 is an explanatory diagram showing an example of a drive system according to a fifth embodiment of the present invention.

FIG. 14 is a sectional view showing a sixth embodiment of the present invention.

FIG. 15 is a plan view showing a sixth embodiment of the present invention.

FIG. 16 is a sectional view showing a seventh embodiment of the present invention.

FIG. 17 is a plan view showing a seventh embodiment of the present invention.

[Explanation of symbols]

P passenger compartment, PT tunnel part 1 engine, 2 propeller shaft, 3 clutch 4 lateral transmission, 5 differential, 6 fuel tank 15 spare tire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomohiro Hori 3-1, Shinchi Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (20)

[Claims] 1. A powertrain structure for a vehicle, wherein a clutch is provided on the transmission side in a powertrain structure in which an engine and a transmission are separated from each other in the front and rear of a vehicle compartment. 2. The powertrain structure for a vehicle according to claim 1, wherein the clutch input shaft is provided at a position higher than the engine output shaft. 3. The clutch is set vertically and the transmission is set horizontally.
The vehicle powertrain structure described. 4. The powertrain structure for a vehicle according to claim 3, wherein the differential device is installed below the transmission. 5. The powertrain structure for a vehicle according to claim 3, wherein a fuel tank is installed above the transmission. 6. The differential device and the transmission are installed side by side in parallel with each other.
The vehicle powertrain structure described. 7. The powertrain structure for a vehicle according to claim 4, wherein a fuel tank is installed above the transmission. 8. The powertrain structure for a vehicle according to claim 7, wherein an auxiliary machine is installed below the fuel tank on the side of the transmission. 9. The powertrain structure for a vehicle according to claim 7, wherein a cross member is provided below the fuel tank on a side of the transmission. 10. The powertrain structure for a vehicle according to claim 1, wherein a clutch is installed behind the transmission. 11. The powertrain structure for a vehicle according to claim 10, wherein a spare tire is arranged around the clutch. 12. The powertrain structure for a vehicle according to claim 11, wherein the differential device and the transmission are arranged one above the other, and a spare tire is arranged around the clutch and the transmission. 13. An auxiliary machine is provided behind the clutch, and a spare tire is arranged around the auxiliary machine.
0 power train structure of the vehicle. 14. The powertrain structure for a vehicle according to claim 1, wherein the clutch is arranged in front of the transmission and is projected between the left and right seats. 15. A powertrain structure for a vehicle, wherein a clutch is installed below a seat in a powertrain structure in which an engine and a transmission are separated from each other. 16. The powertrain structure for a vehicle according to claim 15, wherein the clutch is installed below the front end of the seat. 17. A structure of a power train in which an engine and a transmission are separated from each other, wherein the transmission is arranged below a cross member, and the cross member has a large cross section, and a spare tire is housed in the cross member. The powertrain structure of the vehicle characterized by the above. 18. The powertrain structure for a vehicle according to claim 17, wherein the differential device and the transmission are arranged in parallel in the front-rear direction. 19. The powertrain structure for a vehicle according to claim 17, wherein the clutch is provided so as to project in the vehicle compartment. 20. The power train structure for a vehicle according to claim 17, wherein a fuel tank is provided above the cross member.