JPH06144019A - Driving system arranging structure for vehicle - Google Patents

Abstract

PURPOSE:To minimize the effect on the volume of a cabin, shorten the length of a vehicle, lower the center of gravity, and generate a low yaw inertial moment in the case of using a longitudinally installed engine. CONSTITUTION:In the driving system arranging structure of a vehicle 1 wherein an in line engine 6 is installed along the longitudinal direction of the vehicle 1, a projected section 10, which is projected upward at the nearly central portion along the width direction of the vehicle 1, an engine room formed continuously to the projected section, and the engine 6 installed with cylinder head sections faced downward and with cylinder block sections faced upward are provided, and the whole or a part of the engine 6 is arranged in the projected section 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle drive system arrangement structure.

[0002]

2. Description of the Related Art In order to improve the running characteristics of a vehicle, there are known methods for improving power performance, reducing weight, minimizing the occurrence of yaw moment of inertia, uniforming front-rear weight distribution, etc.
A front midship vehicle for a front-wheel drive vehicle and a midship vehicle for a rear-wheel drive vehicle have been proposed as typical examples.

On the other hand, when the engine is of the in-line type or has a large overall length, the engine is of the so-called horizontal type,
The size of the vehicle in the front-rear direction is reduced, and in addition, the weight is prevented from being dispersed in the front-rear direction of the vehicle, and in particular, the yaw moment of inertia is reduced. However, if an in-line type engine or a long-length engine is installed vertically, it is necessary to extend the length of the engine in the front-rear direction. As a result of creating the cause of dispersion in the front-rear direction of the vehicle, it is extremely disadvantageous.

However, this vertical engine has many advantages such as a layout of the intake / exhaust system, an accommodation of each auxiliary device, and a good weight balance in the left-right direction. It is appropriately used when the volume can be set large in the front-rear direction.

Japanese Patent Laid-Open Publication No. 1-156132 discloses a "vehicle drive device" which uses a vertical engine as described above.
As mentioned above, this is one of the proposals for arranging as a front midship. According to the present proposal, while a transmission is provided at the rear end of an engine vertically arranged in the engine room via a clutch, the transmission is provided so as to be housed inside a tunnel that is a protruding portion, The output shaft from the transmission is directed toward the front of the vehicle, and a front wheel drive differential gear that meshes with this output shaft is arranged in the lower side surface portion of the vertically installed engine. This is a configuration provided so as to penetrate the lower portion of the engine.

With the above construction, the vertically mounted engine can be arranged at a lower position with respect to the vehicle body.

[0007]

However, in the above proposal, the engine having the largest weight and having the greatest influence on the weight distribution has the following problem because the intake / exhaust system is provided near the head of the engine. The engine still had to be installed in the engine room. For this reason, the engine cannot be further moved toward the center point of the yaw moment of inertia generation, and the front midship cannot be achieved further.

Further, in order to achieve further front midship by using such a vertically mounted engine, a measure to deal with it by moving the dash panel, which is a partition between the passenger compartment and the engine room, further rearward. However, according to this measure, the volume of the passenger compartment is compressed and reduced by the engine room. As a result,
The passenger compartment becomes narrower, which has the disadvantage of sacrificing habitability.

Similarly, in a (rear) midship vehicle as well, in order to achieve a further midship by using a vertically installed engine, a rear dash panel, which is a partition between the passenger compartment and the rear engine room, is placed further forward. It is possible to deal with this by moving. However, according to this measure, the volume of the passenger compartment is squeezed and reduced in the rear engine room, resulting in the disadvantage that the habitability must be sacrificed.

Therefore, the vehicle drive system disposition structure of the present invention has been made in view of the above problems.
The object of the invention is to minimize the influence on the volume of the passenger compartment when using a vertically installed engine, shorten the vehicle front-rear length, lower the center of gravity, and lower the yaw moment of inertia. It is an object of the present invention to provide a drive system disposition structure of a vehicle that can realize generation.

Further, the object of the second invention is to
In addition to the first aspect of the invention, it is an object of the invention to provide a drive system arrangement structure for a vehicle, which can further improve the degree of freedom in layout.

[0012]

[Means for Solving the Problems] and

In order to solve the above problems and to achieve the object, the present invention is a drive system disposition structure of a vehicle equipped with an in-line engine extending in the longitudinal direction of the vehicle. A convex portion that is convex upward, an engine room that is continuously formed on the convex portion, and an engine that is provided with the cylinder head portion downward and the cylinder block portion upward. All or part of the engine is installed inside the convex portion, so that a particularly heavy engine can be installed without affecting the passenger compartment, and a low center of gravity and a midship can be achieved. Work like.

Further, preferably, the vehicle is a front-wheel drive vehicle, and the engine is disposed rearward of the front-wheel drive shaft for driving the front wheels, so that an engine having a particularly large weight can be moved with respect to the yaw moment of inertia center. The rear center of the vehicle can be installed without affecting the passenger compartment, and the lower center of gravity and the front midship can be achieved.

Preferably, the vehicle is a rear-wheel drive vehicle in which an engine is arranged at the rear of the vehicle and the rear wheels are driven, and the engine is arranged in front of the rear-wheel drive shaft for driving the rear wheels. By installing the engine, a particularly heavy engine can be installed in the front (passenger side) without affecting the passenger compartment, and the center of gravity and the (rear) midship can be achieved.

Further, preferably, in a drive system arranging structure of a vehicle equipped with an in-line type engine extending in the longitudinal direction of the vehicle, a convex portion protruding upward at a substantially central portion along the width direction of the vehicle, An engine room that is continuously formed on the protruding portion,
An engine that is provided with the cylinder head portion facing downward and the cylinder block portion facing upward, and is wholly or partly submerged inside the convex portion, a clutch provided at the output portion of the engine, and a clutch. By providing the transmission continuously connected to the vehicle and the differential device arranged in the lower portion of the transmission or the clutch, it is possible to arrange a particularly heavy engine without affecting the vehicle interior. This helps to lower the center of gravity and midship, and improve the degree of freedom in layout.

Preferably, in order to dispose the engine and the clutch apart from each other, an intermediate shaft is provided between the engine and the clutch so that the bonnet and the rear lid can be reduced.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be sequentially described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration plan view of the first embodiment, and FIG. 2 is a front view showing a cross section taken along the line AA of FIG. Further, FIG. 9 shows B1- of FIG.
FIG. 13 is a sectional view taken along the arrow B1, and FIG. 13 is a skeleton diagram of the first embodiment.

First, in FIG. 1, a lower portion of the front engine room of the vehicle body 1 whose outline is indicated by a broken line in the drawing is important as a reinforcing member of the vehicle body and a buffer member at the time of a frontal collision. A pair of front frame portions 2 having a function is provided along the front-rear direction of the vehicle body.

The front frame portion 2 has a first cross member 2a extending in the vehicle body width direction in front of the vehicle.
The second cross member 2b is integrally provided at the rear by welding or the like.

While these cross members 2a, 2b provide a mounting portion for accessories such as the radiator 22,
The inverted vertical engine 6, the clutch 7, the transmission 8, the differential device, and the like, which are the greatest features of the present invention, are supported and fixed via a rubber 9 shown by a broken line in the figure. For this support and fixation, a pair of mount portions 8m provided forward from the case body portion of the mission 8 as shown in the figure,
Mount portions 6m provided rearward from the vicinity of the cylinder head portion of the engine 6 are provided at predetermined positions.

Next, the upside-down vertically installed engine 6 is provided with an intake portion 6a on the right side and an exhaust portion 6b on the left side as viewed from the passenger compartment side. A surge tank 20 and a fuel supply means (not shown) shown by a chain line in the figure are connected to the intake portion 6a, and fresh outside air sucked from the air intake 21 is introduced into the surge tank 20. After the introduction, it is configured to be introduced into the intake portion 6a.

Further, for the exhaust portion 6b, the exhaust pipe 16
Are connected to the exhaust pipe 16, and the exhaust is sent to the catalyst portion 11 provided downstream of the exhaust pipe 16, and a muffler (not shown) provided at the rear end of the vehicle silences the exhaust gas.

On the other hand, in order to separate the engine compartment from the vehicle compartment, there is provided a tunnel portion 10 which is provided so as to project upward as shown by hatching in the drawing, and this tunnel portion 10 is so-called. It is arranged continuously on the dash panel.

This tunnel portion 10 is designated as B1-B1 in FIG.
As shown in the cross-sectional view in the direction of the arrow, it has a fractured shape that houses the engine 6 installed in an inverted state, covers the engine block 6f side with its ceiling part, and lowers the cylinder head 6h of the engine on the lower opening side. It has a built-in appearance.

Next, referring further to FIG. 2 in FIG. 1, the front frame portion 2 is substantially horizontal from the mounting portion of the radiator 22 to the drive shaft 15 of the front wheel 14 as shown in the drawing. The drive shaft 15 is formed in a downwardly rightward direction and is horizontally provided below the tunnel portion 10. Using the above frame structure, the upside-down vertical engine 6, the clutch 7, the transmission 8, the differential device 12, and the like are supported and fixed by the rubber 9.

Further, the intake portion 6a of the upside-down vertically installed engine 6
The above-mentioned surge tank 20 connected to the above is disposed so as to be located above the engine 6 and above the clutch 7 and the mission 8.

On the other hand, the exhaust portion 6b of the engine 6 is arranged so that the exhaust pipe 16 is located downward and rearward as shown in the drawing. Further, because the engine is installed in an inverted state, the so-called dry sump system is adopted for lubrication, and the oil tank 1 for the dry sump shown by the one-dot chain line in the figure is used.
9 is provided right above the engine.

Next, in the vehicle compartment, a center portion 5 is provided continuously with the tunnel portion 10 to form a so-called center console portion and the like.

Referring again to FIG. 1, the steering seat 23 and the footrest 2 are provided in either of the left and right seats in the driver's seat divided into the left and right by the tunnel portion 10 or the center portion 5.
4, a clutch pedal 25, a brake pedal 26, and an accelerator pedal 27 are provided.

Continuing to refer to the skeleton diagram of FIG. 13, a clutch 7 is connected to the output shaft of the engine 6 to transmit power to the mission 8. The power from the mission 8 is configured to be transmittable to the front differential device 12 via the third gear 33,
The left and right front wheels 14 are driven via the left and right drive shafts 15.

With the configuration described above, the vertically installed engine 6
Even in the case of using the passenger compartment, the tunnel portion 10 is configured to project at the central portion with respect to the passenger compartment side so that the effect on the passenger compartment volume can be minimized and the front-rear length of the vehicle can be shortened. Can be achieved.

That is, in comparison with the conventional vehicle 100 shown by the chain double-dashed line in FIG. 2, the total length of the engine room can be particularly shortened, and a heavy engine can be accommodated in the tunnel 10, so that the center of gravity can be lowered. Furthermore, it is possible to realize the low yaw moment of inertia generation by bringing the engine closer to the yaw moment of inertia generation center.

Next, the second embodiment will be described. 3 is a schematic configuration plan view of the second embodiment, and FIG. 4 is a front view showing a cross section taken along the line AA of FIG. 10 is a sectional view taken along the line B2-B2 of FIG. 3, and FIG. 14 is a skeleton diagram of the second embodiment.

First, in each of the drawings, in the description of the above-mentioned first embodiment, the same components as those already described are designated by the same reference numerals, and the description thereof will be omitted. Only the differences will be described.

First, in FIG. 3, the upside-down vertically installed engine 6 is provided with an intake portion 6a on the right side and an exhaust portion 6b on the left side as viewed from the passenger compartment side.
The surge tank 20 and the fuel supply means (not shown) shown by the alternate long and short dash line in the figure connected to a are arranged immediately above the engine 6 as shown in the figure, and the air intake 2
1 is provided so as to extend along the front-rear direction, extends rightward, and bends forward again. The fresh pipe 1 is introduced into the surge tank 20 after introducing fresh outside air into the surge tank 20. It is configured to be introduced into the portion 6a together with the fuel.

Further, the clutch 7 is more than the differential device 12 for transmitting power to the drive shaft 15 for driving the front wheels 14,
It is located in front of the vehicle and is provided integrally with the mission 8. The mount portion 8m of the mission 8 supports and fixes it on the first cross member 2a via a rubber 9.

As described above, in order to provide the engine 6 and the clutch 7 separately from each other, the intermediate shaft 13 shown by the broken line in the drawing is provided between the engine 6 and the clutch 7.

On the other hand, the tunnel portion 10 is B2-B in FIG.
As shown in the cross-sectional view taken along the arrow 2, it has a fractured shape that accommodates the engine 6 installed in an inverted state, and covers the engine block 6f side in a state in which there is no gap in the ceiling portion of the engine 6 while The cylinder head 6h is built in so as to face the lower opening side, and the engine output shaft 6e shown by the broken line can be positioned higher.

Next, referring further to FIG. 3 in FIG. 3, the front frame portion 2 is, as shown, between the mounting portion of the radiator 22 and the drive shaft 15 of the front wheel 14, the above-mentioned first portion.
It is made horizontally longer than that of the embodiment, is formed in the lower right direction from the portion of the drive shaft 15, and is horizontally provided below the tunnel portion 10.

Using the above frame structure, the inverted vertical engine 6, the clutch 7, the mission 8 and the differential device 12 are arranged.
The other part is supported and fixed by the rubber 9. However, by connecting the clutch 7 and the engine 6 using the intermediate shaft 13 as described above, a part of the clutch 7 is infiltrated below the differential device 12. Therefore, the hood line 1h in the engine room can be set lower than that of the conventional vehicle body 100.

Continuing to refer to the skeleton diagram of FIG. 14, the output shaft of the engine 6 includes the clutch 7 and the intermediate shaft 1.
It is connected via 3 and transmits power to the mission 8. The power from this mission 8 is
Via the first gear 31, the second gear 32 and the third gear 33,
The front differential device 12 is configured to be transmittable, and the left and right front wheels 14 are driven via the left and right drive shafts 15.

With the configuration described above, the vertically installed engine 6
Even when using, the tunnel portion 10 is configured to be projected to the passenger compartment side only at the central portion so that the effect on the passenger compartment volume can be minimized and the bonnet line 1h is set low. Therefore, the center of gravity can be lowered.

The configuration described above is a front-wheel drive vehicle, and the case where the engine 6 is arranged behind the front-wheel drive shaft 15 for driving the front wheels 14 has been described.
Next, in the case of a rear-wheel drive vehicle (rear-mid vehicle) that has a vertically installed engine behind the vehicle and drives the rear wheels,
A third embodiment and a fourth embodiment will be described.

FIG. 5 is a schematic plan view of the third embodiment, and FIG. 6 is a front view showing a cross section taken along the line AA of FIG. 11 is a sectional view taken along the line B3-B3 of FIG. 5, and FIG. 15 is a skeleton diagram of the third embodiment.

First, in FIG. 5, the lower portion of the vehicle body 1 in the rear engine room, the outline of which is indicated by the broken line in the figure, is important as a reinforcing member of the vehicle body and a buffer member at the time of a rear collision. A pair of rear frame portions 3 having a function is provided along the front-rear direction of the vehicle body.

The rear frame portion 3 has a first cross member 3a in the vehicle width direction in the front of the vehicle.
The second cross member 3b is integrally provided at the rear by welding or the like.

While these cross members 3a and 3b provide a mounting portion for various accessories, the upside-down vertical engine 6, the clutch 7, the mission 8, the differential device and the like, which are the main features of the present invention, are illustrated. It is provided for supporting and fixing via the rubber 9 shown by the broken line inside. In order to support and fix in this way, a pair of mount portions 8m provided rearward from the case main body portion of the mission 8 provided rearward of the vehicle as shown in the figure, and from the vicinity of the cylinder head portion of the engine 6 A pair of mount portions 6m provided toward the front are provided at predetermined positions, respectively, and support four points.

Next, the inverted vertical engine 6 is provided with an intake portion 6a on the left side and an exhaust portion 6b on the right side as viewed rearward from the passenger compartment side. A surge tank 20 and a fuel supply means (not shown) shown by a chain line in the figure are connected to the intake portion 6a, and fresh outside air sucked from the air intake 21 is supplied to the surge tank 20.
After being introduced into the intake section 6a, it is introduced into the intake section 6a.

For the exhaust section 6b, the exhaust pipe 16
Are connected to the exhaust pipe 16, and the exhaust is sent to the catalyst portion 11 provided downstream of the exhaust pipe 16 so that the muffler 17 provided at the rear end of the vehicle silences the exhaust.

On the other hand, in order to separate the rear engine compartment from the vehicle compartment, there is provided a tunnel portion 10 provided so as to project upward as shown by hatching in the figure. It is arranged continuously on the rear panel.

This tunnel section 10 is B3-B3 in FIG.
As shown in the cross-sectional view in the direction of the arrow, it has a fractured shape that houses the engine 6 installed in an inverted state, covers the engine block 6f side with its ceiling part, and lowers the cylinder head 6h of the engine on the lower opening side. It has a built-in appearance.

Next, referring to FIG. 6 in FIG. 5, the rear frame portion 3 is formed substantially horizontally from the lower portion of the seat 18 shown in FIG. The rear wheel 34 is formed so as to be slanted upward toward the upper side of the drive shaft 35 of the rear wheel 34 and then becomes horizontal again. Using the above frame structure, the upside-down vertical engine 6, the clutch 7, the transmission 8, the rear wheel drive differential device 12, and the like are supported and fixed by the rubber 9.

The intake portion 6 of the upside-down vertically installed engine 6
The above-mentioned surge tank 20 connected to a is arranged on the right side of the clutch 7 and the mission 8.

On the other hand, the exhaust portion 6b of the engine 6 is arranged so that the exhaust pipe 16 is located downward and rearward as shown in the figure. Further, because the engine is installed in an inverted state, a so-called dry sump system is adopted for lubrication, and an oil tank (not shown) for the dry sump is provided near the engine.

Next, the tunnel portion 10 shown by hatching in the drawing is formed so as to project from the rear engine room into the passenger compartment, and between the seats 18 provided on the left and right in the width direction in the passenger compartment. The protruding portion 10a is provided so as to be embedded therein. This tunnel part 10
Are installed in series on the panel that separates the rear engine room from the passenger compartment.

Continuing to refer to the skeleton diagram of FIG. 15, a clutch 7 is connected to the output shaft of the engine 6 to transmit power to the mission 8. The power from the mission 8 is configured to be transmitted to the rear differential device 12 via the third gear 33,
The left and right rear wheels 34 are driven via the left and right drive shafts 35.

With the configuration described above, the vertically installed engine 6
Even in the case of using the passenger compartment, a part of the tunnel portion 10 is projected to the front side in the passenger compartment central portion with respect to the passenger compartment side, so that the effect on the passenger compartment volume can be minimized. The front-rear length of the vehicle can be shortened. That is, the conventional vehicle 100 shown by the chain double-dashed line in FIG.
In comparison with, the total length of the rear engine room can be shortened, and a heavy engine can be used in the tunnel section 10.
Since it is housed inside, the center of gravity can be lowered, and further, the engine can be brought closer to the yaw moment of inertia generation center to realize the low yaw moment of inertia generation.

Next, a fourth embodiment will be described. FIG. 7 is a schematic plan view of the fourth embodiment, and FIG. 8 is a front view showing a cross section taken along the line AA of FIG. 12 is a sectional view taken along the line B4-B4 of FIG. 7, and FIG. 16 is a skeleton diagram of the fourth embodiment.

First, in each of the drawings, in the description of the above-described third embodiment, the same components as those already described are designated by the same reference numerals, and the description thereof will be omitted. Only the differences will be described.

In FIG. 7, the clutch 7 is a differential device 1 for transmitting power to a drive shaft 35 for driving the rear wheels 34.
It is located in the rear of the vehicle than 2 and is integrally provided with the mission 8.
Are supported and fixed on the second cross member 3b via the rubber 9.

As described above, in order to provide the engine 6 and the clutch 7 separately from each other, the intermediate shaft 13 shown by the broken line in the drawing is provided between the engine 6 and the clutch 7.

On the other hand, as shown in the sectional view taken along the line B4-B4, the tunnel portion 10 has a fractured shape which houses the engine 6 installed in an inverted state. The cylinder head 6h of the engine is housed so as to face the lower opening side while covering in the state where the gap is eliminated, so that the engine output shaft 6e shown by the broken line can be positioned higher.

Using the frame structure described above, the upside-down vertical engine 6, the clutch 7, the mission 8 and the differential device 12 are provided.
The other part is supported and fixed by the rubber 9. However, by connecting the clutch 7 and the engine 6 using the intermediate shaft 13 as described above, a part of the clutch 7 is infiltrated below the differential device 12. Therefore, it is possible to set the lid line of the rear engine room lower than that of the conventional vehicle body.

Continuing to refer to the skeleton diagram of FIG. 16, the clutch 7 is attached to the output shaft of the engine 6 by the intermediate shaft 1.
It is connected via 3 and transmits power to the mission 8. The power from this mission 8 is
Via the first gear 31, the second gear 32 and the third gear 33,
The front differential device 12 is configured to be transmittable, and the left and right rear wheels 34 are driven via the left and right drive shafts 35.

With the configuration described above, the vertically installed engine 6
Even in the case of using the passenger compartment, only the tunnel portion 10 is projected to the front side in the central part with respect to the passenger compartment side, so that the effect on the passenger compartment volume can be minimized, and the rear lid line is provided. It is possible to set it low, and to lower the center of gravity.

The present invention described above is not limited to the configuration of each of the above-described embodiments, and it goes without saying that the setting can be changed as appropriate without departing from the gist of the invention. The same effect can be obtained by replacing the power transmission device configured by and with an automatic transmission device configured by a fluid coupling or the like.

[0067]

As described above, according to the present invention,
When a vertically installed engine is used, the influence on the passenger compartment volume can be minimized, the vehicle front-rear length can be shortened, and a low center of gravity and low yaw moment of inertia can be achieved. An arrangement structure can be provided.

Further, according to the second invention, in addition to the first invention, it is possible to provide a drive system disposition structure of a vehicle which can further improve the degree of freedom in layout.

[Brief description of drawings]

FIG. 1 is a schematic configuration plan view of a first embodiment.

FIG. 2 is a sectional front view taken along the line AA of FIG.

FIG. 3 is a schematic configuration plan view of a second embodiment.

FIG. 4 is a front view in section taken along the line AA of FIG.

FIG. 5 is a schematic configuration plan view of a third embodiment.

6 is a front view in section taken along the line AA of FIG.

FIG. 7 is a schematic configuration plan view of a fourth embodiment.

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

9 is a sectional view taken along the line B1-B1 of FIG.

10 is a sectional view taken along the line B2-B2 of FIG.

11 is a sectional view taken along the line B3-B3 of FIG.

12 is a sectional view taken along the line B4-B4 of FIG.

FIG. 13 is a skeleton diagram of the first embodiment.

FIG. 14 is a skeleton diagram of the second embodiment.

FIG. 15 is a skeleton diagram of the third embodiment.

FIG. 16 is a skeleton diagram of the fourth embodiment.

[Explanation of symbols]

 1 vehicle body, 2 front frame, 3 rear frame, 5 center sill part, 6 engine, 7 clutch, 8 mission, 9 anti-vibration rubber, 10 tunnel part, 11 catalytic converter, 12 differential device, 13 intermediate shaft, 14 front wheel, 15 drive shafts, 16 exhaust pipes, 17 mufflers, 18 seats, 20 surge tanks, 21 air intakes, 22 radiators, 23 steering wheels, 34 rear wheels, and 35 drive shafts.

Claims (5)

[Claims] 1. A drive system arranging structure for a vehicle equipped with an in-line engine extending along the vehicle front-rear direction, wherein a convex portion is provided upwardly at a substantially central portion along the width direction of the vehicle, and the convex portion. The engine room is formed continuously in the installation portion, and the engine is provided with the cylinder head portion facing downward and the cylinder block portion facing upward, and all or part of the engine is provided in the protruding portion. A drive system arrangement structure for a vehicle, characterized in that the drive system is arranged inside the vehicle. 2. The vehicle drive system arrangement according to claim 1, wherein the vehicle is a front-wheel drive vehicle, and the engine is arranged rearward of the front-wheel drive shaft for driving the front wheels. Construction. 3. The vehicle is a rear-wheel drive vehicle in which the engine is arranged at the rear of the vehicle and drives rear wheels, and the engine is provided in front of the rear-wheel drive shaft that drives the rear wheels. The drive system arrangement structure for a vehicle according to claim 1, wherein the drive system arrangement structure is provided. 4. A drive system arranging structure for a vehicle equipped with an in-line type engine extending in the vehicle front-rear direction, wherein a convex portion is provided upwardly at a substantially central portion along the width direction of the vehicle, and the convex portion. An engine room continuously formed in the installation portion, and the engine provided with the cylinder head portion facing downward and the cylinder block portion facing upward, and the whole or a part of the engine is infiltrated inside the protruding portion. A clutch provided at an output portion of the engine, a transmission connected to the clutch, and a differential device arranged at a lower portion of the transmission or the clutch. The drive system layout structure of the vehicle. 5. The drive system arrangement for a vehicle according to claim 4, wherein an intermediate shaft is provided between the engine and the clutch in order to arrange the engine and the clutch apart from each other. Construction.