JP2966083B2 - Vehicle powertrain structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a powertrain structure for a vehicle in which an engine and a transmission are arranged horizontally.

(Prior Art) Conventionally, it is generally well known that an FF (Front Engine / Front Drive) type vehicle or a four-wheel drive vehicle has a structure in which an engine and a transmission are arranged horizontally in an engine room at a front portion of a vehicle body. Have been.

In this type of structure, a transmission is usually arranged in series with an engine, and a power connecting / disconnecting device such as a clutch is arranged between the two, as disclosed in, for example, Japanese Patent Publication No. 61-2523. It is supposed to. But,
In this case, there is a problem that the axial length of the entire power train such as the engine and the transmission becomes considerably long.
In particular, with the increase in the number of cylinders and the output of the engine, this has become remarkable.

Therefore, in order to solve such a problem, for example, as disclosed in JP-A-63-103735, a transmission is arranged in parallel with the engine, and both of them are provided by power transmission means such as gears and churn. One that is connected has been developed and put into practical use.

(Problems to be Solved by the Invention) In a reciprocating engine, it is known that if an additional mass is provided at a predetermined position in the axial direction of a crankshaft, vibration, noise, and the like can be reduced. For this reason, the above example (JP-A-63-103735)
In this example, a transmission mechanism such as a gear for transmitting engine power (rotational force of the crankshaft) to the transmission is provided at the center of the crankshaft of the engine.

However, in this case, it is necessary to avoid interference with a large-diameter clutch provided on the shaft of the transmission, so that there is a problem that the center distance between the engine and the transmission must be relatively long.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle in which a power connection / disconnection device such as the above-described clutch is appropriately arranged to reduce a shaft distance between an engine and a transmission. To provide a powertrain structure.

(Means for Solving the Problems) In order to achieve the above object, the inventions according to Claims (1) to (3) are arranged such that the engine is placed horizontally with respect to the vehicle body with its crankshaft directed in the vehicle width direction. In the power train structure of a vehicle in which a transmission is arranged in parallel with the engine, a transmission mechanism for transmitting engine power to the transmission from between the cylinders in the crankshaft of the engine is provided. It is assumed that a power connecting / disconnecting device for connecting / disconnecting power transmission from the engine to the transmission is arranged on the shaft of the transmission mechanism.

According to the invention described in claim (1), a shaft of the transmission is provided concentrically with a front wheel axle, an engine is disposed at a front side of the transmission, and a shaft of a transmission mechanism is disposed at a front side of the engine. It is configured to be extended in the vehicle width direction.

In the invention described in claim (2), the engine is arranged on the front side of the front wheel axle, and the transmission is arranged on the front side of the engine. Further, the transmission mechanism has a configuration in which a shaft of the transmission mechanism extends in the vehicle width direction between the engine and the transmission.

According to a third aspect of the present invention, in addition to the constituent features of the first or second aspect of the present invention, the power connection / disconnection device is provided on the shaft of the transmission mechanism when the power connection / disconnection device is viewed in the vehicle longitudinal direction. It is configured to be arranged at a part located on the side.

(Operation) With the above configuration, in the inventions according to claims (1) to (3), the large-diameter power connection / disconnection device is not provided on either the shaft of the engine or the transmission, and the engine power is transmitted to the transmission. Since the transmission mechanism is provided on the shaft of the transmission mechanism, the distance between the engine and the transmission can be reduced as much as possible without considering the interference with the power connection / disconnection device.

In the invention described in claim (1), the entire power train such as the transmission and the engine is concentrated around the axle.
In the invention described in claim (2), the entire power train is integrated in a state where the engine is close to the axle.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 and 2 show a power train structure of a vehicle according to a first embodiment of the present invention, wherein 1 is a vehicle body, 2 is a vehicle body 1
The engine room 2 is separated from the vehicle room 4 by a dash panel 3.

In the engine room 2, a radiator 5 is disposed in front of the engine room 2, and an engine 6 and a transmission 7 are disposed behind the radiator 5. The engine 6 is a six-cylinder reciprocating engine and is disposed horizontally with the crankshaft 11 facing the vehicle width direction. The transmission 7 is disposed laterally behind the engine 6 and in parallel with the crankshaft 11.

The central portion of the crankshaft 11 in the axial direction,
A drive gear 12 is rotatably provided at a portion between the cylinder and the fourth cylinder. The drive gear 12 is rotatably integrated with one end of a shaft 13 which is disposed in the vehicle width direction on the front side of the engine 6. It is engaged with the driven gear 14 provided. The other end of the shaft 13 extends outward from the side end surface of the engine 6 in the vehicle width direction. The other end of the shaft 13 has a power connection / disconnection for disconnecting / transmitting power from the engine 6 to the transmission 7. A clutch 15 is provided as a position. While a drive splotter 16 is connected to the clutch 15, a driven sprocket 17 is provided on the primary shaft 21 side of the transmission 7, and a chain 18 is wound between the sprockets 16 and 17. ing. When the clutch 15 is connected, the engine power is transmitted from the axial center portion of the crankshaft 11 of the engine 6 to the transmission 7 by the drive / driven gears 12 and 14, the shaft 13, the drive sprocket 16, the chain 18 and the driven sprocket 17. A transmission mechanism 19 for transmitting the power to the vehicle is configured.

The transmission 7 includes a primary shaft 21 parallel to each other.
And a counter shaft 22, and both shafts 21, 2
A speed change gear train 23 is provided between the two. Further, the primary shaft 21 is formed of a hollow shaft, and by inserting the axle shaft 34L into the hollow shaft,
34L are disposed concentrically and rotatably relative to each other.
Then, the engine power input to the transmission 7 is transmitted to the counter shaft 22 via a reduction gear 24 provided integrally with the driven sprocket 17 for rotation, and is transmitted from the counter shaft 22 to one of the transmission gear trains 23. The power is transmitted to the primary shaft 21 via one gear, and the speed is appropriately reduced during this time.

An output gear 25 is provided at one end of the primary shaft 21 of the transmission 7 so as to rotate integrally therewith. The power output from the output gear 25 is divided into a front wheel side and a rear wheel side by a helical gear type center differential 31. The power on the front wheel side is divided into left and right by a helical gear type front differential 33 as a wheel-to-wheel differential through a set of transmission gears 32, and then axle shafts 34L and 34R as front wheel axles and a drive, respectively. The power is transmitted to the left and right front wheels 8 via the shafts 35L and 35R. The power on the rear wheel side is a bevel gear 36
In addition, the power is transmitted to the rear wheel side of the rear part of the vehicle body via the propeller shaft 37.

Here, a detailed description will be given of the mutual arrangement of the power train parts and members such as the engine 6 and the transmission 7 as shown in FIG. 2. As shown in FIG. 2, the engine 6 has an upper side (cylinder head side). Is arranged horizontally with the camera tilted backward. The crankshaft of this engine 6
The shaft center P2 of the shaft 13 of the transmission mechanism 19 is set at a position in front of the vehicle body and obliquely above the shaft center P1 of the shaft 11, and the clutch 15 disposed coaxially with the shaft 13 moves in the vehicle width direction. When seen, the axis P1 of the crankshaft 11 overlaps. The axis P3 of the primary shaft 21 of the transmission 7 is set at a position slightly behind the vehicle body and slightly higher than the axis P1 of the engine 6.

2, reference numerals 41 and 42 denote an intake pipe and an exhaust pipe of the engine 6, respectively, and 43 denotes a rack and pinion of a steering device disposed behind the transmission 7 and near the lower portion of the dash panel 3. The exhaust pipe 42 is disposed below the rack & pinion 43.

Therefore, in the first embodiment, the shaft 13 of the transmission mechanism 19 for transmitting the engine power to the transmission 7 is disposed to extend in the vehicle width direction on the front side of the engine 6 (the side opposite to the transmission arrangement side), By providing the clutch 15 at the end of the shaft 13 extending to the outside of the side end surface of the engine 6, without considering the interference with the clutch 15,
The center distance between the engine 6 and the transmission 7 can be made as short as possible. Particularly, in the case of the embodiment, since the primary shaft 21 of the transmission 7 is provided coaxially with the axle shaft 34L, the entire power train can be centralized near the axle.

The drive gear 12 serving as an engine power take-out portion of the transmission mechanism 19 is provided at a predetermined position in the axial direction of the crankshaft 11 (in the case of the embodiment of the six-cylinder engine, the third cylinder and the fourth cylinder).
And the additional mass of the gear 12, etc., can effectively reduce noise, vibration and the like of the engine 6.

FIG. 3 shows a power train structure of a vehicle according to a second embodiment of the present invention. In the case of the second embodiment, an engine 6 is disposed in front of an axle shaft 34L serving as a front wheel axle, with a crankshaft 11 extending in the vehicle width direction, and a transmission 7 is provided in front of the engine 6. Are located.

A first shaft 51 extending in the vehicle width direction is disposed between the engine 6 and the transmission 7, and is provided at one end of the shaft 51 at a central portion of the crankshaft 11 in the axial direction. A driven gear 14 meshing with the driving gear 12 is provided integrally with the rotation, while the other end of the shaft 51 is connected to the engine 6.
Of the clutch 15
Is provided. The clutch 15 has a first drive gear 52
The drive gear 52 is connected to a second shaft arranged coaxially with the primary shaft 21 of the transmission 7.
A driven gear 54 is provided at one end of the shaft 53 so as to rotate integrally therewith. When the clutch 15 is connected, the engine power is transmitted from the axial center portion of the crankshaft 11 of the engine 6 to the transmission 7 by the two sets of drive / driven gears 12, 14, 52, 54 and the two shafts 51, 53. A transmission mechanism 55 for transmitting the power to the vehicle is configured.

On the other hand, the power shifted by the transmission 7 is transmitted from a sprocket 61 provided at the end of the primary shaft 21 via a chain 62 to a planetary gear type center differential 63 provided on the axle shaft 34L. Then, the vehicle is divided by the differential 63 into a front wheel side and a rear wheel side. The center differential 63 is provided with the transmission 7
A ring gear 63a as an input unit receiving power from the side,
A sun gear 63b as an output section to the rear wheel,
It comprises a planetary gear 63c meshing with each of the gears 3a and 63b, and a carrier 63d as an output unit for the front wheels that supports the planetary gear 63c. The power on the front wheel side (carrier 63d)
After being divided into left and right by a helical gear type front differential 33, it is transmitted to the left and right front wheels 8 via axle shafts 34L, 34R and drive shafts 35L, 35R, respectively. Also, on the rear wheel side (sun gear 63b
The power of the side) is a hollow transmission shaft 64 that is rotatably fitted to the outer periphery of the axle shaft 34L, a bevel gear
The power is transmitted to the rear wheel side of the rear part of the vehicle body via the propeller shaft 35 and the propeller shaft 36.

FIG. 4 shows a power train structure of a vehicle according to a third embodiment of the present invention. The third embodiment is different from the second embodiment in that the transmission mechanism 55 for transmitting the engine power to the transmission 7 from the axial center of the crankshaft 11 of the engine 6.
A first shaft 51 and a second shaft 53 are provided concentrically, and a clutch for connecting and disconnecting transmission of engine power to the transmission 7 between the ends of the shafts 51 and 53 is provided.
15 is provided. The other configuration of the power train structure is the same as that of the second embodiment, and the same members are denoted by the same reference numerals and description thereof will be omitted.

In the second and third embodiments, the clutch 15 is connected to the transmission mechanism in the same manner as in the first embodiment.
Since the shaft 51 of the shaft 55 is provided at an end extending to the outside of the side end surface of the engine 6, the distance between the shaft of the engine 6 and the transmission 7 can be determined without considering the interference with the clutch 15. Can be made as short as possible. In particular, by disposing the shaft 51 and the transmission 7 on the front side of the engine 6, the engine 6 is connected to the axle (the axle shaft 34).
It is possible to consolidate the entire power train while approaching L).

The present invention is not limited to the above-described first to third embodiments, but includes various other modifications.
For example, in each of the above embodiments, the case where the clutch 15 is provided as the power connecting / disconnecting device has been described. However, the present invention is similarly applied to a device having an automatic transmission and having a torque converter instead of the clutch 15. You can do this.

In each of the above embodiments, the engine 6 and the transmission 7
Although the case where the power train composed of the above is arranged at the front of the vehicle body has been described, the present invention can of course be similarly applied to the case where the power train is arranged at the rear of the vehicle body.

(Effects of the Invention) As described above, according to the vehicle power train structure of the invention described in claims (1) to (3), the engine power is transmitted to the transmission from between the cylinders in the crankshaft of the engine. A power connection / disconnection device that connects and disconnects the transmission of power from the engine to the transmission is arranged on the shaft of the transmission mechanism, which reduces the vibration and noise while reducing the distance between the engine and the transmission. Can be shortened, and the size of the power train can be reduced.

According to the invention described in claim (1), the entire power train such as the transmission and the engine can be integrated around the axle.

In the invention described in claim (2), the entire power train can be centralized with the engine close to the axle.

[Brief description of the drawings]

The drawings show an embodiment of the present invention.
1 shows a first embodiment, FIG. 1 is a skeleton diagram of a power train, and FIG. 2 is a side view showing an arrangement state of a power train in a front portion of a vehicle body. FIG. 3 is a diagram corresponding to FIG. 1 showing the second embodiment, and FIG. 4 is a diagram corresponding to FIG. 1 showing the third embodiment. DESCRIPTION OF SYMBOLS 1 ... Body 6 ... Engine 7 ... Transmission 11 ... Crankshaft 13, 51 ... Transmission mechanism shaft 15 ... Clutch (power connection / disconnection device) 19, 55 ... Transmission mechanism 34L ... Axle shaft ( axle)

Claims (3)

(57) [Claims] 1. A power train structure for a vehicle in which an engine is arranged laterally with respect to a vehicle body with its crankshaft directed in a vehicle width direction, and a transmission is arranged in parallel with the engine. A transmission mechanism for transmitting the engine power to the transmission from between the cylinders in the crankshaft of the engine; and a power for connecting and disconnecting the transmission of power from the engine to the transmission on the shaft of the transmission mechanism. A connection / disconnection device is disposed, and a shaft of the transmission is provided concentrically with a front wheel axle, and an engine is disposed at a front side of the transmission, and a transmission mechanism is disposed at a front side of the engine. A power train structure for a vehicle, wherein the shaft extends in the vehicle width direction. 2. A power train structure for a vehicle in which an engine is arranged laterally with respect to a vehicle body with its crankshaft directed in a vehicle width direction, and a transmission is arranged in parallel with the engine. A transmission mechanism for transmitting the engine power to the transmission from between the cylinders in the crankshaft of the engine; and a power for connecting and disconnecting the transmission of power from the engine to the transmission on the shaft of the transmission mechanism. A disconnecting device is disposed, an engine is disposed on the front side of the front wheel axle, and a transmission is disposed on the front side of the engine, and a transmission mechanism shaft is disposed between the engine and the transmission. A power train structure for a vehicle, wherein the power train structure extends in the vehicle width direction. 3. The vehicle power as claimed in claim 1, wherein the power connecting / disconnecting device is disposed on a portion of the shaft of the transmission mechanism which is located on a side of the engine when viewed in the longitudinal direction of the vehicle body. Train structure.