JPS6250235A - Four-wheel-drive vehicle - Google Patents

Abstract

PURPOSE:To allow a hydraulic clutch to be easily installed, maintained, and inspected with the provision of both a simplified hydraulic circuit and a simplified electric control system by providing a clutch on the outside of a transmission case where a torque of the clutch is determined by driving an electrically- driven pump. CONSTITUTION:A front differential gear 30 is arranged in the direction normal to a transmission gear 10 which is arranged to the transverse direction with regard to a car body so as to form a transversal trans-axle type drive system. And both a shaft 42a of a transfer gear 42 which is meshed with a shaft of a final gear 32 of the front differential gear 30, and a transfer shaft 41 which supports the transfer gear 42 rotatably, are stretched out of a mission case 2. Then a hydraulic clutch 50 is provided in a clutch cover between the transfer gear shaft 42a and the transfer shaft 41 for easy installation, maintenance, and inspection as well. And the hydraulic circuit can be simplified by configurating a device in such a way that a hydraulic pressure is set up by allowing a variable motor to drive an electrically-driven pump so as to control the torque for the front and rear wheels.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a part-time or full-time four-wheel drive vehicle using a hydraulic clutch as a transformer seven-door clutch.
, 1 () or horizontally mounted transmission.
The hydraulic transfer clutch and its operation system (Niseki Rirub).

[Report of the Invention] As a four-wheel drive vehicle, the center differential fjl system requires a differential lock device for the center differential device, making the structure complicated. (A direct coupling type using a transfer clutch was proposed, and a hydraulic clutch was used in this transfer clutch to avoid the tight corner braking phenomenon when turning, and to make the torque distribution between the front and rear wheels variable. There is a tendency to perform various types of control.

[Prior art] Regarding direct-coupled four-wheel drive vehicles that use a hydraulic clutch as the transfer clutch, for example, Japanese Patent Laid-Open No. 57-84227, Japanese Patent Laid-Open No. 58-56920, There is a prior art published in January 1982-5692. Here, these prior art techniques are t'L b vertical r!
Equipped with automatic transmission /, -1! Ya train 1 in front; l
There is an oil tank installed inside the female at the rear of the transmission. The automatic transmission's oil pressure source or line pressure is used to form a two-oil clutch circuit, and the solenoid valve in the hydraulic circuit is operated by an electric signal to control the C clutch oil pressure. .

[Problems to be Solved by the Invention] However, in the configuration of the F%-1-6S advance tk technique, the hydraulic clutch is built into the case of the drive system. Attaching the clutch when moving the clutch becomes complicated and requires a lot of time for maintenance and inspection. In addition, the hydraulic circuit of the prior art is limited to those with automatic transmission "J!M", and is applied to 343 gears of manual transmission.

where d) in a gear train with a mani-coal transmission;
Then, if you install an A-il pump driven by the engine on the engine side, the hydraulic clutch will start running!
If tQ is <41', install an oil passage inside the transmission shaft at g(1
Problems arise, such as the fact that there is a significant change in jQ,; Well, I'm confused about the operation of the solenoid valve.
In the 4 type (well, the dedicated valve 1-1 is the centerpiece. From this, the configuration of the hydraulic circuit to the C hydraulic clutch including the A oil pump and the electric control system is 1.1 with a manual transmission. It is desirable to simplify these things because they are complicated.

The present invention has been made in view of the above points, and therefore provides an oil 11 clutch set (iJlJ), which facilitates maintenance and inspection.
Furthermore, an object of the present invention is to provide a four-wheel drive vehicle in which the hydraulic circuit and electric control system can be simplified when applied to a vehicle with a manual transmission.

[Means for Solving the Problems 1] In order to achieve the above object, the present invention provides a differential system d for a transmission disposed on the right side of the vehicle body. In the MIi transaxle type transmission system, which is arranged at the f angle and has a transmission configuration, there is a shaft part of the 7th gear 1st gear that meshes with the final gear of the differential gear, and the shaft part of the 1st gear that meshes with the final gear of the differential gear, and the shaft part of the transfoot gear that is rotatable. Take out the supported transfer shaft outside the transmission case, and install a hydraulic clutch between the upper 21-transfer shaft and the transfer shaft inside the clutch cover, which is pushed out of the transmission case. A hydraulic circuit is constructed by connecting an electric pump with variable pressure to an oil clutch.

[Sakukawa] Based on the configuration described in 1, the clutch torque of the external hydraulic clutch attached to the transmission case is determined by the drive of an electric pump, thereby controlling the torque distribution between the front and rear wheels.

And the braking phenomenon when turning! ′! The vehicle is designed to perform various functions such as evasive maneuvering and the performance of four-wheel drive at high speeds and high loads.

[Embodiment 1] Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings.

In FIG. 1, a transverse transaxle type transmission system is explained as a vehicle to which the present invention is applied.
1 is a clutch housing, and this housing 1 has
Mick'n case 2 is combined, Mi31 John 11-S2
A side cover 3 is connected to the III GM, and an external case 4 is connected to the rear of the clutch housing 1. -fl, a clutch 5 is housed in one side of the clutch housing 1, and a transmission 10 is housed in the other side of the Clara f housing 1, the transmission case 2, and the sight saw bar 3. A front differential device 30 and a transfer device 40 are installed to form a transaxle type. As a drive system, the crankshaft 6 of the engine is connected to the input shaft 11 of the transmission 10 via the clutch 5, and the output shaft 12 of the engine is connected to the differential gear 30 via the transfer device 40. ■It is connected to the rear drive shaft 1 in the transmission case 4 to provide two transmissions to the rear wheels.

The transmission 10 is of a constant mesh type, and the gearbox 10 is of a constant mesh type, and the
The first speed gear 13. is connected to the output shaft 11.12 from the clutch side.
14, 2nd gear gear 15.16, 3rd gear gear 17°1
8. 4th gear ratio gears 19 and 20 are provided, and a 5th gear 2 is provided on both wheels 11 and 12 within the 4L side cover 3.
1°22 is the step number. Then, between the output shaft 12 and the driven gear t'14.1G for the first speed and second speed, which is rotatably installed there, between the driven gear 1718.20 for the third speed and fourth use, and the driven gear t'14.1G for the fifth speed, Driven gear A7
22 In between, Irezone Synchro Hi123.24.2
5 is provided on the sleeve side of the input shaft 11 and the synchronizer device 23 for reverse gear. Nophidragia 28 is designed to mesh directly with X726.27. In this way, each synchronizer 23
．． Due to the synchronized meshing action of 24°2ji, the first
The gear is shifted from 1st to 5th speed, and the idler gear 172B is engaged to obtain the EA stage.

In the differential gear 30, a drive gear 31 formed on the output shaft 12 of the transmission 10 meshes with a final gear 32, and a differential gear 33 installed at the center of the final gear 32 The left and right front wheel axles 34 and 35 protrude from them.

1~Lanceforce VT@40 is installed rotatably [
- A transfer gear 4 consisting of a gear part and a shaft part 42a that mesh with the final gear 32 described in -I- on the transfer shaft 41.
2 is rotatably installed 4-J. The transfer shaft 41 is further connected to the A7 drive shaft 7 via a pair of bevel gears 5744.45, and transmission is configured from the A7 drive shaft 7 to the rear wheels via an unillustrated P[1 bellows shaft, etc. .

Therefore, the hub 52 of the shaft portion 42a and the transfer shaft 41 are taken out of the shaft via the bearing portion 46 of the shaft portion 42a, and installed in the transmission case 2! ,: A hydraulic clutch 50 is installed between the hub 52 of the transfer rear shaft portion 42a and the transfer shaft shaft 41 in the Knok f cover 41.

In FIG. 2, to describe the hydraulic clutch 50 in detail, a drum 51 is rotatably fitted into a support portion 47a that is integrally attached to the inside of the clutch cover 47, and this drum! ) 1 is spline-coupled to the transfer shaft 41. Further, the hub 52 is connected to the transfer gear shaft portion 42a kl.
spline connection like i1, and screw l- inside the drum 51.
A piston chamber 54 is installed on one side of the cylinder 53, a return spring 55 is applied on the other side, and a drum 51 and a disk 56 of the hub 52 are installed in multiple plates. Clutch cover 47. An oil passage 57 formed in the support portion 47a and the drum 51 communicates with the screw chamber 54.

As part of the hydraulic system, an oil passage 62 on the 01 output side of an electric pump 61 driven by a motor 60 communicates with the oil passage 57 . In addition, an A-refice 63 is provided in the screw-on 53 so as to prevent the oil pressure in the piston chamber 54 from changing depending on the presence or absence of pump oil pressure.
Collect the A oil that is taken out and accumulates inside the clutch cover 47.
The clutch cover 47 communicates with the oil sump 6;) via a drain oil passage 64.

Furthermore, as an electric control system, a 4Wr') switch 6G, a vehicle speed switch 61. The accelerator opening switch 68 is turned to the right, and operation signals of these switches are manually input to the control unit 69. -G control 1 nit 69GI The rotation speed of the motor 60 is changed according to each switch operation signal.

Next, the operation of the four-wheel drive vehicle configured in this way will be explained in the third section.
This will be explained with reference to the flowchart shown in the figure.

First, the power from the output shaft 12 of the transmission 10 is directly) 1
1todeno'JA i? It is transmitted to the front wheels via 'r 30, and is further inputted from the final gear 32 to the hub 52 of the hydraulic clutch 50 via the transfer gear 42.

When the 4WD switch 66 is turned off, the electric pump 61 is stopped by the control unit 69.

Lee! In addition, the piston chamber 54 in the hydraulic clutch 50
If oil is not supplied, the oil will be discharged from the orifice 63 at Jt and will no longer generate hydraulic pressure, causing the piston 53 to retreat and the drum 51 and hub 52 to be released. Therefore, the power is not transmitted to the parts after the tunnel unit i'r40, and the vehicle runs in two-wheel drive using only the front wheels.

On the other hand, when the 4WD switch 63 is set to A, the motor 60 rotates.
8, the control unit 69 rotates the motor 60 at a low speed. Therefore, by supplying a predetermined amount of oil to the piston chamber 54 of the hydraulic clutch 50 by the pump 61, the piston 53
The disk 56 is pressed so that it can slip, and the drum 51
and the hub 52, resulting in four-wheel drive driving. Here, the torque of the hydraulic clutch 50 is set to a small value, and the torque distribution between the front and rear wheels is adjusted accordingly, so that the hydraulic clutch 50 absorbs the booking phenomenon when turning under these driving conditions. Ru.

Then, under high-speed or high-load running conditions, the Chisugokonit 69 rotates the [-Taro 0] at high speed, and the pump 61 supplies a large amount of oil. For this reason, the drum 51 and hub 52 of the hydraulic clutch 50 are substantially integrally coupled, increasing the clutch torque, resulting in a four-wheel drive system in which the front and rear wheels are directly connected, and its performance is demonstrated.

Note that the torque control of the hydraulic clutch 50 can be arbitrarily performed other than in the embodiments using various input signals.

One embodiment of the present invention has been described above, but RR, FR
It can also be applied to base part-time or full-time models without a 4WD switch. In addition, the I! is equipped with a transverse automatic transmission! It is also applicable to the i'l-lane.

[Effects of the Invention] According to the present invention, since the hydraulic clutch is attached to the outside of the transmission case, maintenance and inspection are not required. becomes very easy.

In addition, since an electric pump is used in the hydraulic circuit,
Il'i! There is a freedom t1 on the design 31 for "fFth", and the color scheme can be elaborated. Furthermore, since the clutch oil pressure is determined by driving an electric pump, the circuit is extremely simplified, and the gear shift of a manual gearbox is greatly simplified.
71 - suitable for lanes.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a four-wheel drive vehicle of the present invention, FIG. 2 is a hydraulic clutch and its operating system, and FIG. 3 is a flowchart explaining the operation. 2...Mission case, 10...Transmission, 30.
...Front 1'! 4()...Transfer device, 32...Final gear. 41... Transfer shaft, 42... Transfer fan 7 gear, 42a...
- Shaft portion, 47...Clutch cover, 50...Hydraulic clutch, 57.62.64...Oil passage, 61...Electric pump 1169...Control-1 unit.

Claims (1)

[Scope of Claims] A center differential device for a first axle of a transmission arranged in the left-right direction of the vehicle body is arranged on an axis parallel to the output shaft of the transmission, and the center differential device is connected to the differential device. A transverse transaxle type transmission system that selectively transmits the output of a transmission to a second axle via a transfer clutch, comprising: a shaft portion of a transfer gear that meshes with a final gear of the differential device; A transfer shaft rotatably supporting the transmission shaft extends outside the transmission case, and a hydraulic clutch is provided between the transfer gear shaft portion and the transfer shaft inside a clutch cover mounted outside the transmission case, and a hydraulic clutch is provided between the transfer gear shaft portion and the transfer shaft, and A four-wheel drive vehicle, characterized in that a control circuit is provided to control the discharge pressure of the electric pump according to conditions, and the hydraulic clutch is selectively driven with the pump discharge pressure according to the driving conditions of the vehicle. .