JPS644533A - Hydraulic four-wheel-drive device - Google Patents
Hydraulic four-wheel-drive deviceInfo
- Publication number
- JPS644533A JPS644533A JP16065087A JP16065087A JPS644533A JP S644533 A JPS644533 A JP S644533A JP 16065087 A JP16065087 A JP 16065087A JP 16065087 A JP16065087 A JP 16065087A JP S644533 A JPS644533 A JP S644533A
- Authority
- JP
- Japan
- Prior art keywords
- variable displacement
- wheel drive
- drive motor
- selector valve
- displacement type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE:To make it possible to facilitate the change-over between the four wheel drive mode and the two wheel drive mode of a vehicle by disposing a selector valve having a open-center position, between a variable displacement pump and a variable displacement type front wheel drive motor so that the selector valve is changed over to turn on and off the drive of front wheels. CONSTITUTION:Hydraulic oil discharged from a variable displacement pump P is bifurcated and fed into a variable displacement type font wheel drive motor MF and a fixed displacement type rear wheel drive motor MR through constant ratio flow dividing valves 5, 6, respectively. In this arrangement, the variable displacement type front wheel drive motor MF is arranged so as to make the rotational speed of a motor shaft 7 variable in association with the rotational speed of a swash plate 2 as a speed changing device, which is associated with a steering wheel 1. In the above-mentioned arrangement, selector valve V having an open-center position is disposed between the variable displacement pump P and the variable displacement type front wheel drive motor MF. Further, the position of the selector valve V is changed over to the open-center position, as required, so as to cut off the supply of pressure oil from the pump P to the front wheel motor MF.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16065087A JPH0649425B2 (en) | 1987-06-26 | 1987-06-26 | Hydraulic four-wheel drive |
US07/211,912 US4886142A (en) | 1987-06-26 | 1988-06-27 | Hydraulic four-wheel drive system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16065087A JPH0649425B2 (en) | 1987-06-26 | 1987-06-26 | Hydraulic four-wheel drive |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS644533A true JPS644533A (en) | 1989-01-09 |
JPH0649425B2 JPH0649425B2 (en) | 1994-06-29 |
Family
ID=15719521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16065087A Expired - Lifetime JPH0649425B2 (en) | 1987-06-26 | 1987-06-26 | Hydraulic four-wheel drive |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0649425B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6189641B1 (en) * | 1998-04-15 | 2001-02-20 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Four-wheel hydraulic drive system for working vehicle |
-
1987
- 1987-06-26 JP JP16065087A patent/JPH0649425B2/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6189641B1 (en) * | 1998-04-15 | 2001-02-20 | Kanzaki Kokyukoki Mfg. Co., Ltd. | Four-wheel hydraulic drive system for working vehicle |
Also Published As
Publication number | Publication date |
---|---|
JPH0649425B2 (en) | 1994-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3901339A (en) | Hydrostatic drive-steer system | |
GB1108420A (en) | Motor vehicles having hydrosta tic drive | |
US4793434A (en) | Road finishing machine | |
US4765428A (en) | Power-assisted steering system | |
EP0388876A3 (en) | Hydraulic transmission coupling apparatus | |
JPS644533A (en) | Hydraulic four-wheel-drive device | |
JPH0436889B2 (en) | ||
JPS644535A (en) | Hydraulic four-wheel-drive device | |
US4858713A (en) | Power-assisted steering system | |
JPS644534A (en) | Hydraulic four-wheel-drive device | |
EP0665157A1 (en) | Power-steering device for motor-vehicles | |
JPS644531A (en) | Hydraulic four-wheel-drive device | |
US4805719A (en) | Vehicle | |
GB1480031A (en) | Vehicle auxiliary hydrostatic drive system | |
JPS6214429B2 (en) | ||
JPH084884A (en) | Transmission having hydraulic continuously variable transmission device for work vehicle | |
SU819460A1 (en) | Hydrostatic transmission of multi-axid vehicles | |
CN210258550U (en) | Steering differential device | |
SE511192C2 (en) | Device for differential gear for vehicles | |
GB2221516A (en) | Hydraulic transmission system | |
KR0146778B1 (en) | A power steering device with a bypass circuit | |
KR20030006345A (en) | Power Steering for automobile | |
SU1168439A1 (en) | Vehicle | |
KR0151465B1 (en) | Power steering system for an automobile | |
JPS644532A (en) | Hydraulic four-wheel-drive device |