JPH05272351A - Power train structure for vehicle - Google Patents

Abstract

PURPOSE:To improve the rigidity of a power train structure where an engine and a speed change gear are disposed transversely, and a differential is disposed near the speed change gear, and restrain an opening/closing mode operation where an interval changes to long or short. CONSTITUTION:The side part an a speed change gear 20 side of the cylinder block upper part of an engine 3 and the bearing part 35a of the speed change gear 20 are reinforced and connected by a rib 38. Besides, the bearing part 35a of the speed change gear 20 and the bearing part 36a of a drive shaft in a differential 28 are reinforced and connected by ribs 45-47, and connected by an alternator 50. It is thus possible to restrain an opening/closing mode operation where the engine 3 and the speed change gear 20 are operated in an opposite direction to each other effectively, and regulate the oscillation of the differential 28 effectively.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to improvements in vehicle powertrain structures.

[0002]

2. Description of the Related Art Conventionally, as a vehicle powertrain structure, for example, as disclosed in German Laid-Open Publication DE 3838073, an engine is arranged such that its crankshaft axis is located in the vehicle width direction, and It is known that a transmission is arranged on the rear side of a vehicle body, a shaft of the transmission is positioned parallel to a crankshaft of the engine, and the engine and the transmission are arranged in parallel in the longitudinal direction of the vehicle body. In this prior art publication, the axle of the front wheels and the front wheel differential are arranged below the transmission.

[0003]

However, in the powertrain structure of a vehicle provided with the engine and the transmission arranged in parallel as described above and the front wheel differential, the case of the transmission is formed integrally with the block portion of the engine. However, due to the fact that these two independently move around their respective principal axes of inertia, the engine and the transmission may come close to each other at the weak connection surface of the integrally formed portion of the transmission and the engine. There is a drawback in that the so-called open / close mode operation occurs such that the power train structure is separated from each other and the vibration of the entire power train structure cannot be sufficiently suppressed. As described above, the description has been made by taking the case between the engine and the transmission as an example, but since the opening / closing mode operation occurs between the engine and the front wheel differential and between the front wheel differential and the engine in the same manner as described above, the power is reduced. The vibration of the entire train structure cannot be suppressed further.

The present invention has been made in view of the above circumstances, and its object is to presume that an engine and a transmission are arranged in parallel, and in a power train structure including these and a front wheel differential, The structure is reinforced to effectively suppress the opening and closing mode operation between these three parties,
It is to effectively suppress the vibration of the power train structure.

In this case, the opening / closing mode operation may remain slightly due to the reinforcement of the power train structure. In this case, the opening / closing mode operation does not affect the shape of the important part of the engine, such as the fuel chamber, through the reinforcing part. It is also an object of the present invention to deal with such problems.

[0006]

In order to achieve the above object, according to the invention of claim 1, an engine having a crankshaft arranged in the vehicle width direction, and a crank of the engine located in the longitudinal direction of the vehicle body of the engine. It is premised on a powertrain structure of a vehicle including a transmission having an axis positioned parallel to the axis. The shaft bearing of the transmission is connected to the block side facing the transmission of the engine by a reinforcing member.

Further, the invention according to claim 2 is directed to a power train structure of a vehicle in which the engine and the transmission are arranged in parallel as described above and the front wheel differential is arranged in the vicinity of the transmission. The bearing portion of the shaft of the transmission and the bearing portion of the differential for the front wheels are connected by a reinforcing member.

Further, in the invention described in claim 3, the object is the same as that of the invention described in claim 2, and the side portions of the engine block portion and the bearing portions of the front wheel differential that face each other are connected by a reinforcing member. It is configured to

In addition, the invention according to claim 4 has a configuration in which the inventions according to claims 1 to 3 are combined.

According to a fifth aspect of the present invention, in the above first or fourth aspect of the invention, a plurality of reinforcing members that connect the bearing portion of the shaft of the transmission and the block portion of the engine are specified. In addition to the above-mentioned ribs, an empty space that absorbs thermal deformation of the ribs is formed between the ribs.

Further, according to the invention of claim 6,
Instead of the described invention, the reinforcing member is limited to another different one, and the upper position of the bearing portion of the transmission and the upper position of the block side portion facing the transmission of the engine are connected by the reinforcing member. ..

In addition, in the invention described in claim 7, in place of the invention described in claim 6, the reinforcing member for connecting the bearing portion of the transmission and the block portion of the engine is provided with the shaft center of the shaft of the transmission and the engine. It is arranged on a plane that connects with the axis of the crank shaft.

Further, in the invention of claim 8, in the invention of claim 2 or 4, the reinforcing member for connecting the bearing portion of the transmission and the bearing portion of the front wheel differential is specified, and It consists of auxiliary equipment.

Further, in the invention according to claim 9, in a powertrain structure of a vehicle in which an engine and a transmission are arranged in parallel, and a block portion of the engine and a case of the transmission are integrally formed, the engine and the transmission are provided. In the integrally formed portion between and, an empty space is formed on the side of the cylinder of the engine.

In addition, in the invention described in claim 10, the invention described in claim 1 and the invention described in claim 9 are combined.

Further, in the invention described in claim 11, the invention described in claim 9 or claim 10 is limited, and the engine is composed of a multi-cylinder engine, and empty spaces formed on the sides of the cylinders are different from each other. It is set to the volume.

[0017]

With the above construction, in the inventions of claims 1 to 4, the engine block portion and the transmission bearing portion, the transmission bearing portion and the front wheel differential, and the front wheel differential portion and the engine block, respectively. Since the parts are connected and reinforced by the respective reinforcing members, the operation in each open / close mode is effectively suppressed, and the vibration of the entire power train structure is effectively reduced and limited.

In this case, according to the fifth aspect of the invention, the block portion of the engine and the bearing portion of the transmission are connected to each other by a plurality of ribs for reinforcement, and the engine block portion is slightly thermally deformed. Even if the ribs affect a plurality of ribs, the ribs are allowed to be deformed toward the vacant space existing between them, so that the thermal deformation of the ribs gives the axial center of the bearing portion of the transmission. The influence can be absorbed, and the bearing portion of the transmission is effectively prevented from being displaced due to thermal deformation of the engine block portion.

According to the sixth aspect of the present invention, a large force is applied to the upper position of the bearing portion of the transmission and the upper position of the engine block to move between them in the open / close mode. Since these two positions are connected to each other and reinforced by a reinforcing member, the movement in the open / close mode is effectively restricted.

Further, in the invention according to claim 7, since the reinforcing member is arranged on a plane connecting the axis of the crankshaft of the engine and the axis of the main shaft of the transmission, the crankshaft and the transmission. The distance from the main shaft etc. is extremely small, and good power transmission is secured.

Further, according to the present invention, since the bearing portion of the transmission and the bearing portion of the front wheel differential are connected and reinforced by an engine accessory such as an alternator, a special reinforcing member is required. Instead, the weight can be reduced and the price can be reduced.

In addition, in the ninth and tenth aspects of the invention, the block portion of the engine and the case of the transmission are integrally formed by connecting them, but the engine is included in the integrally formed portion. Since an empty space is formed on the side of the cylinder, even if some movement in the open / close mode between the engine and the transmission remains, the movement is absorbed in the empty space, so the cylinder liner of the engine is not deformed. This is reliably prevented from occurring, and the radiated sound generated in the transmission is reduced in the empty space.

According to the invention described in claim 11, in the multi-cylinder engine, the empty spaces of the invention described in claim 10 are formed on the sides of the respective cylinders, but the empty spaces have different volumes. Since it is set, the radiated sound of the transmission does not resonate in the empty space.

[0024]

As described above, according to the first to fourth aspects of the present invention, two of the engine, the bearing portion of the main shaft of the transmission, and the front wheel differential are connected by the reinforcing member. Since the structure is reinforced by this, the movement of the power train structure in the opening / closing mode can be effectively suppressed, and the vibration can be reduced.

In particular, according to the invention of claim 5, thermal deformation of the reinforcing member between the engine and the bearing portion of the transmission is prevented.
Since it is absorbed in the empty space located between the plurality of reinforcing members, it is possible to effectively prevent the displacement of the bearing portion of the transmission.

According to the sixth aspect of the invention, since the upper portion of the engine block on which the force of movement in the open / close mode is large and the upper portion of the bearing portion of the transmission are connected and reinforced by the reinforcing member, The movement can be suppressed more effectively.

Further, according to the invention described in claim 7, since the reinforcing member is arranged on the plane connecting the shaft center of the bearing portion of the transmission and the shaft center of the crankshaft of the engine, these transmissions are It is possible to accurately maintain the distance between the main shaft and the like and the crankshaft of the engine, and to maintain good power transmission.

In addition, according to the invention described in claim 8, since the reinforcing member is constituted by the auxiliary machine of the engine, it is not necessary to separately provide the reinforcing member, and the weight and cost can be reduced accordingly. it can.

According to the ninth and tenth aspects of the present invention, an open space is formed on the side of the cylinder in the integrally formed portion between the block portion of the engine and the case of the transmission. Can be absorbed in the empty space to prevent the cylinder liner of the engine from being deformed, and the radiation noise generated in the transmission can be reduced in the empty space to improve the quietness of the power train.

Further, according to the eleventh aspect of the present invention, since the empty spaces formed on the side of each cylinder of the multi-cylinder engine are set to have different volumes, resonance of radiation sound of the transmission can be prevented. ..

[0031]

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

1 to 4 show an embodiment in which the present invention is applied to a power train structure of a front wheel drive vehicle.

In each of the figures, 1 is a vehicle hood,
Reference numeral 2 denotes an engine room formed below the bonnet 1. A multi-cylinder engine 3 is arranged in the engine room 2, and the engine 3 has a crankshaft 3a positioned in the vehicle width direction and is horizontally arranged in the vehicle width direction. As shown in FIG. 1, the engine 3 is arranged so as to be inclined rearward of the vehicle body, the intake port 3b is located on the front side of the vehicle body, and the exhaust port 3c is located on the rear side of the vehicle body. An intake pipe 4 extending forward of the vehicle body is connected to the intake port 3b, and an exhaust pipe 5 is connected to the exhaust port 3c. The exhaust pipe 5 is arranged so as to extend obliquely rearward and downward.

In the engine 1, the intake port 3b
And the combustion chamber 6 in which the exhaust port 3c is opened is the cylinder 3
A piston 7 fitted in a liner 3f having a predetermined cooling water passage 3e on the inner periphery of d has a variable volume, and an intake valve 8 and an exhaust valve 9 are arranged. Above the intake valve 8 and the exhaust valve 9, camshafts 10, 11 are provided.
3, each of the shafts 10 and 11 has a driven sprocket 10a, 1 arranged at its front end as shown in FIG.
It is rotationally driven by the crankshaft 3a through the two-stage chains 12 and 13 that drive 1a.

A clutch device 14 is arranged at the right end of the engine 1 in FIG. The clutch device 14 is configured to connect and disconnect the flywheel 3e connected to the end of the crankshaft 3a of the engine 3 and the output shaft 15.

Further, as shown in FIG. 2, behind the engine 3, there is, for example, a manual transmission 2 having five forward gears and one reverse gear.
0 is placed. The transmission 20 has its input shaft 2
0a and the output shaft 20b arranged in a straight line after that.
Are both arranged in parallel with the crankshaft 3a of the engine 3 and are arranged in the engine room 2.

A power transmission mechanism 23 is arranged between the transmission 20 and the clutch device 14. The power transmission mechanism 23 includes a drive sprocket 23 a drivingly connected to the right end portion of the output shaft 15 in FIG. 2 and an input shaft 2 of the transmission 20.
Driven sprocket 23b drivingly connected to 0a, and chain 2 wound around both sprockets 23a, 23b.
3c and the output shaft 1 when the clutch device 14 is connected.
5 is transmitted to the input shaft 20a of the transmission 20 via the power transmission mechanism 23.

On the other hand, on the output shaft 20b of the transmission 20,
The final drive pinion 20c is arranged at the right end portion thereof.

Further, as shown in FIGS. 1 and 2, a drive shaft 26 is arranged below the transmission 20 so as to extend in the vehicle width direction. The drive shaft 26 includes
As shown in FIG. 2, the front wheel differential 28 is arranged at a position immediately below the final drive pinion 20c of the transmission 20.

The differential 28 is of a planetary gear type and, as shown in FIG. 2, has a ring gear 28a meshed with the final drive pinion 20c of the transmission 20 and a case 28b to which the ring gear 28a is connected. And two pinion gears 28c arranged in the case 28b, and two side gears 28d connected to the left and right shaft portions 26a and 26b of the drive shaft 26.

As shown in FIG. 1, the engine 3 includes a cylinder head portion 3x, a cylinder block upper 3y located above a line connecting the crankshaft 3a and the axis of the drive shaft 26, and a cylinder block lower 3z. An oil pan 30 is connected to the lower surface of the cylinder lower block 3z. The cylinder block upper 3y is extended to the rear of the vehicle body as shown in FIG. 1, and includes the case 20d of the transmission 20 and the upper half of the bearing portion 29 of the left and right shaft portions 26a and 26b of the differential 28. The cylinder block upper 3y
Is formed integrally with the.

Next, the cylinder block upper 3y.
Are shown in detail in FIGS. 4 and 5. In each figure, 35
Reference numerals a and 35b denote bearing portions that support the output shaft 20b of the transmission 20 on the left and right sides of the final drive pinion 20c, and 36a denotes a bearing portion of the left shaft portion 26a of the differential 28. As shown in FIG. 5, one end of a rib 38 as a reinforcing member is connected to the upper end portion of the left bearing portion 35a of the transmission 20. The rib 38 extends to the upper left in the figure and the other end thereof is the cylinder block upper. Three
It is reinforced and connected to the upper end of the rear side portion 20s of y. Further, one end of a rib 39 as a reinforcing member is also connected to the upper end portion of the right bearing portion 35b of the transmission 20, and the rib 39 extends substantially horizontally to the left in the drawing and is reinforced and connected to the cylinder block upper side portion 20s. ing. Further, a rib 40 as a reinforcing member is arranged also on a plane connecting both shaft centers of the left side bearing portion 35a of the transmission 20 and the crank shaft 3a of the engine 3, and the rib 40 also serves as a left side of the transmission 20. Lower part of bearing part 35a and cylinder block upper side part 2
0s are reinforced and connected. Further, between the three ribs 38 to 40, empty spaces 41 and 42 having a predetermined volume are formed so as to allow the ribs 38 to 40 to be slightly thermally deformed in the short direction.

The left bearing portion 35a of the transmission 20 is also included.
And the left shaft portion 26 of the differential 28
The bearing part 36a of a is connected to the side parts facing each other by two ribs 45 and 46 as reinforcing members, and the transmission 2 of the one rib 45 is connected.
It is also reinforced and connected by another rib 47 as a reinforcing member that connects the 0-side end and the differential 28-side end of the other rib 46.

Further, as shown in FIG. 3, an alternator 50, which is an engine accessory, is disposed diagonally behind the transmission 20. The alternator 50 together with another engine accessory 51 arranged at the position of the oil pan 30 of the engine 3 is connected to the crankshaft 3 of the engine 3 via a drive pulley 52.
driven by a. The alternator 50 is supported at two points, one of the supporting points 50a is a boss portion arranged at the upper end portion of the left bearing portion 35a of the transmission 20 in FIG. 5, and the other supporting point 50b is of the differential 28. At a position of a boss portion extending substantially upward from the bearing portion 36a in FIG. 5, the bearing portion 35a of the transmission 20 and the bearing portion 36a of the differential 28 are reinforced and connected by the alternator 50.

Further, in the bottom view of the cylinder block upper 3y shown in FIG. 9, the upper hemisphere portion of the bearing portion 36b of the right shaft portion 26b of the differential 28 is provided with two parallel parallel reinforcing members extending toward the engine 3 side. Rib 5
2, 53 are provided, and the tips of the ribs 52, 53 are connected to the rear side surface 3u of the main body of the cylinder block upper 3y.

Next, the details of the cylinder block lower 3z are shown in FIG. In the figure, the cylinder block lower 3z
Is extended to the side of the differential 28, and a shaft case 55 that covers the differential 28 and the drive shaft 26 is integrally formed. The shaft case 55 includes a right shaft portion 26 of the differential 28.
The lower hemispherical portion 36b of the bearing portion b is integrally formed, and one end of three ribs 56, 57, 58 as reinforcing members is formed in the bearing portion 36b at the same position on the engine 3 side on the left side in the figure. The other ends of the respective ribs 56 to 58 are connected to the main body side surface 3t of the cylinder block lower 3z at a predetermined interval, and the three ribs 56 to 58 connect the cylinder block lower 3z and the right shaft of the differential 28. The bearing portion 36b of the portion 26b is reinforced and connected.

Further, in the cylinder block upper 3y shown in FIG. 4, A- which crosses between the cylinders 3d ...
7, the partition between the cylinders 3d ... And the case 20d of the transmission 20 are integrally formed so as to be continuous with each other. As shown in FIG. 8, a vacant space 60 whose only upper part is closed is formed between each cylinder 3d and the case 20d of the transmission 20 on the side thereof. Each cylinder 3
As shown in the bottom view of FIG. 9, each of the empty spaces 60 on the side of d ...
The flywheel 3e has a structure in which the thickness of the vertical wall portion 3u on the side of the transmission 20 of 60d becomes thicker as it goes to the flywheel 3e side (lower side in FIG. 9) as shown by the broken line in the figure.
The empty space 60a on the side is set to have a smaller volume, and the empty spaces 60a to 60d are set to have different volumes.

In FIG. 9, reference numeral 65 denotes a fixing member for fixing the reverse idle gear of the transmission 20 to the transmission case 20d. The fixing member 65 has two ribs 66 extending toward the engine 3 side. 67 are integrally formed, and both ribs 6 are formed.
The tips of 6, 67 are joined to the main body side portion 3s of the cylinder block upper 3y when the idle gear is attached and fixed. Further, on the left side of the fixing member 65 in FIG. 2, the left bearing portion 36 of the right shaft portion 26 b of the differential 28 is provided.
The lower hemisphere portion 29b of b is positioned in contact with the fixing member 65.

Further, in FIG. 9, in the main body of the cylinder block upper 3y, the differential 2 is provided on the side of the cylinder 3d farthest from the flywheel 3e.
8, an oil return hole 70 is formed in the vertical wall portion 3u, and the oil that has lubricated the valve operating system of the cylinder head portion 3x through the return hole 70 is returned to the oil pan 30.

In addition, in FIG. 5, an oil return hole 71 for returning the oil that lubricated the drive chain 12 and the like is formed in the front wall of the cylinder block upper 3y of the engine 3 and the return hole 71 is formed. A rib 72 is formed inside the block so as to face the return hole 71, and the rib 72 prevents the oil returned from the return hole 71 from flowing backward due to the movement of the piston 7, and also the return hole 71. The block 71 is configured to suppress the decrease in rigidity of the front wall portion of the block due to the formation of 71.

In FIG. 3, reference numerals 75a, 75b and 75c denote power train side support points of mounts for mounting and fixing the above power trains to the vehicle body. The support points 75a are on the rear side surface 3s of the cylinder block upper 3y. It is located at the upper end, the support point 75b is located below the front end surface of the cylinder block upper 3y, and the other support point 75c is located substantially below the differential bearing 36a of the cylinder block lower 3z. Further, in FIG. 4, 76 is a transmission case 20d.
Are two cross-shaped ribs that reinforce the upper surface of the.

Therefore, in the above embodiment, the rear side portion 3 of the main body of the cylinder block upper 3y of the engine 3 is used.
s and the bearing portion 35a of the output shaft 20b of the transmission 20 are 3
Since the ribs 38 to 40 are reinforced and connected to each other, the opening / closing mode operation between the engine 3 and the transmission 20 can be effectively regulated, vibrations can be effectively suppressed, and quietness can be improved. it can.

In particular, the force of the open / close mode operation strongly acts between the upper end of the cylinder block upper 3y and the upper end of the bearing portion 35a of the transmission 20, but at this portion both the ribs 3y and 35a are ribs 38. Since it is reinforced and connected by, it is possible to more effectively suppress the opening / closing mode operation and improve the quietness.

Further, since the ribs 40 are arranged on the plane connecting the axis of the crankshaft 3a of the engine 3 and the axis of the output shaft 20b of the transmission 20, the equiaxes 3a and 20b are provided.
It is possible to ensure good transmission of engine power by keeping the spaces between them almost equal.

Further, empty spaces 41 and 42 are formed between the three ribs 38 to 40, and the thermal deformation of the ribs 38 and 39 is caused by the thermal deformation of the ribs 38 and 39 during the thermal expansion of the power train.
1, 42 is allowed, the bearing portion 35 of the transmission 20 is
It is possible to suppress the positional deviation between a and 35b.

Further, the bearing portion 35a of the transmission 20 and the right bearing portion 36a of the left shaft portion 26a of the differential 28 are reinforced and connected by the three ribs 45 to 47 and are connected by the alternator 50. Therefore, the rigidity of the transmission 20 and the differential 28 can be secured high, and the weight and cost can be reduced because the alternator 50 also functions as a reinforcing member.

In addition, the left bearing portion 36b of the right shaft portion 26b of the differential 28 and the engine 3
Of the cylinder block upper 3y is reinforced and connected to the rear side portion 3s of the main body of the cylinder block lower 3z of the engine 3 while being reinforced by the two ribs 52 and 53.
And 3 are reinforced and connected by the three ribs 56 to 58, the rigidity between the engine 3 and the differential 28 can be increased, and the vibration of the differential 28 can be effectively suppressed.

In addition, when the opening / closing mode operation of the engine 3 and the transmission 20 is suppressed by the three ribs 38 to 40 as described above, the opening / closing operation which is suppressed and remains although the rigidity between them is high. Although the mode operation easily affects the liner of the cylinder 3d of the engine 3 and the bearing portion 35 of the transmission 20, the cylinder block upper 3 of the engine 3
Since the open space 60 provided on the side of the transmission 20 of y absorbs the opening / closing mode operation that cannot be suppressed, the cylinder liner of the engine 3 is reliably prevented from being deformed and the transmission 20 is generated. The emitted sound is effectively reduced in the empty space 60, and the quietness of the entire power train is improved.

In this case, the empty spaces 60a to 60d on the sides of the cylinders 3d are set to have larger volumes at positions farther from the flywheel 3e, and the empty spaces 60a to 60d are different from each other. The resonance frequencies differ from each other, and the radiated sound generated in the transmission 20 is vacant in the empty space 60.
Resonance is reliably prevented from occurring at a to 60d.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a power train structure as viewed from the left side.

FIG. 2 is an overall configuration diagram in which a power train structure is developed.

FIG. 3 is a left side view of the same.

FIG. 4 is a plan view of a cylinder block upper of the engine.

FIG. 5 is a left side view of the same.

FIG. 6 is a plan view of a cylinder block lower of the engine.

7 is a cross-sectional view taken along the line AA of FIG.

8 is a cross-sectional view taken along the line BB of FIG.

FIG. 9 is a bottom view of a cylinder block upper.

[Explanation of symbols]

3 Engine 3a Crankshaft 3y Cylinder Block Upper 3z Cylinder Block Lower 20 Manual Transmission 20a Input Shaft 20b Output Shaft 20d Transmission Case 28 Differentials 35a, 35b Output Shaft Bearings 36a, 36b Differential Drive Shaft Bearings 38-40 ribs (reinforcing member) 41, 42 empty space 45-47 rib (reinforcing member) 50 alternator (engine accessory) 52, 53 rib (reinforcing member) 56-58 rib (reinforcing member) 60a-60d empty space

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

Claims (11)

[Claims] 1. A power train of a vehicle comprising an engine having a crankshaft arranged in a vehicle width direction, and a transmission located in the longitudinal direction of the vehicle body of the engine and having a shaft positioned parallel to the crankshaft of the engine. In the structure, the bearing portion of the shaft of the transmission and the block side portion of the engine facing the transmission are connected by a reinforcing member. 2. A transmission comprising: an engine having a crankshaft arranged in a vehicle width direction; and a transmission which is positioned in a longitudinal direction of the vehicle body of the engine and whose axis is parallel to the crankshaft of the engine. In a vehicle powertrain structure in which a front wheel differential is disposed in the vicinity, a shaft portion of the transmission and a front wheel differential bearing portion are connected by a reinforcing member. Train structure. 3. An engine having a crankshaft arranged in a vehicle width direction, and a transmission which is located in a longitudinal direction of the vehicle body of the engine and whose axis is parallel to the crankshaft of the engine. In a powertrain structure of a vehicle in which a front wheel differential is arranged in the vicinity, a vehicle in which the block portion of the engine and the bearing portion of the front wheel differential are connected to each other by side members which face each other by a reinforcing member. Power train structure. 4. An engine having a crankshaft arranged in a vehicle width direction, and a transmission which is positioned in a vehicle front-rear direction of the engine and whose axis is parallel to the crankshaft of the engine. In a vehicle powertrain structure in which a front wheel differential is arranged in the vicinity, a shaft bearing of the transmission is connected to a bearing of a shaft of the transmission and a block side facing the transmission of the engine by a reinforcing member. Section and the bearing portion of the front wheel differential are connected by a reinforcing member, and further, the block portion of the engine and the bearing portion of the front wheel differential are connected to each other by side members which are opposite to each other by a reinforcing member. The powertrain structure of the vehicle. 5. The reinforcing member connecting the bearing portion of the shaft of the transmission and the block portion of the engine is a plurality of ribs,
The power train structure for a vehicle according to claim 1 or 4, wherein an empty space for absorbing thermal deformation of the ribs is formed between the ribs. 6. The reinforcing member connecting the shaft bearing portion of the transmission and the block portion of the engine has an upper position of a bearing portion of the transmission and an upper position of a block side portion facing the transmission of the engine. The powertrain structure for a vehicle according to claim 1, wherein the powertrain structure is connected. 7. The reinforcing member connecting the bearing portion of the transmission and the block portion of the engine is arranged on a plane connecting the shaft center of the shaft of the transmission and the shaft center of the crank shaft of the engine. The powertrain structure for a vehicle according to claim 1 or 4, characterized in that. 8. The powertrain structure for a vehicle according to claim 2, wherein the reinforcing member connecting the bearing portion of the transmission and the bearing portion of the front wheel differential is an auxiliary machine of an engine. .. 9. A power train of a vehicle comprising an engine having a crankshaft arranged in a vehicle width direction, and a transmission arranged in the longitudinal direction of the body of the engine and having a shaft parallel to the crankshaft of the engine. In the structure, the block portion of the engine and the case of the transmission are integrally formed, and an empty space is formed at a side of the cylinder of the engine in an integrally formed portion between the engine and the transmission. A vehicle powertrain structure characterized by the following. 10. A power train for a vehicle, comprising an engine having a crankshaft arranged in a vehicle width direction, and a transmission positioned in the longitudinal direction of the vehicle body of the engine and having a shaft positioned parallel to the crankshaft of the engine. In the structure, the block part of the engine and the case of the transmission are integrally formed,
The shaft bearing portion of the transmission and the block side portion facing the transmission of the engine are connected by a reinforcing member, and in the integrally formed portion between the engine and the transmission, the cylinder side of the engine is provided. A powertrain structure for a vehicle, characterized in that an empty space is formed in it. 11. The powertrain structure for a vehicle according to claim 9, wherein the engine is a multi-cylinder engine, and empty spaces on the sides of the cylinders are set to have different volumes.