JPS644539A - Power change-over device for four-wheel-drive vehicle - Google Patents
Power change-over device for four-wheel-drive vehicleInfo
- Publication number
- JPS644539A JPS644539A JP16148187A JP16148187A JPS644539A JP S644539 A JPS644539 A JP S644539A JP 16148187 A JP16148187 A JP 16148187A JP 16148187 A JP16148187 A JP 16148187A JP S644539 A JPS644539 A JP S644539A
- Authority
- JP
- Japan
- Prior art keywords
- vehicle
- wheel drive
- detecting means
- power
- speed
- 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 prevent allocation of brake from changing in a four wheel drive vehicle using a viscous coupling, by providing a power change-over device for cutting off the transmission of power between a front wheel drive vehicle and a rear wheel drive vehicle only when the vehicle is braked at a vehicle speed other than a low speed range. CONSTITUTION:A front drive device 11 is directly coupled to an engine 1, and is coupled to a rear wheel drive device 15 through a viscous coupling 8 using shearing stress of highly viscous fluid. In such a four wheel drive vehicle, there is provided a clutch 9 for turning on and off the transmission of power between both drive devices 11, 15. Further, there are provided a brake operation detecting means 22 and a vehicle speed detecting means 23 (or a speed shift stage position detecting means). Further, a control means 21 receives detection signals from these detecting means 22, 23, and delivers a signal for cutting off the transmission of power between both drive devices 11, 15 to the clutch 9 when a detected vehicle speed is in a range other than a low speed range (or when a detected speed shift stage position is other than a low speed stage position) and brake operation is detected.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16148187A JPH0723061B2 (en) | 1987-06-29 | 1987-06-29 | Power switch for four-wheel drive vehicle |
US07/203,970 US4886141A (en) | 1987-06-08 | 1988-06-08 | Four wheel drive vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16148187A JPH0723061B2 (en) | 1987-06-29 | 1987-06-29 | Power switch for four-wheel drive vehicle |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS644539A true JPS644539A (en) | 1989-01-09 |
JPH0723061B2 JPH0723061B2 (en) | 1995-03-15 |
Family
ID=15735905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16148187A Expired - Fee Related JPH0723061B2 (en) | 1987-06-08 | 1987-06-29 | Power switch for four-wheel drive vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0723061B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06247169A (en) * | 1993-02-22 | 1994-09-06 | Mazda Motor Corp | Drive device for vehicle |
US20100222975A1 (en) * | 2007-06-01 | 2010-09-02 | Miller Jeffrey D | Automatic Control Of Mechanical Front Wheel Drive Using Speed Ratio |
-
1987
- 1987-06-29 JP JP16148187A patent/JPH0723061B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06247169A (en) * | 1993-02-22 | 1994-09-06 | Mazda Motor Corp | Drive device for vehicle |
US20100222975A1 (en) * | 2007-06-01 | 2010-09-02 | Miller Jeffrey D | Automatic Control Of Mechanical Front Wheel Drive Using Speed Ratio |
US8504249B2 (en) * | 2007-06-01 | 2013-08-06 | Deere & Company | Automatic control of mechanical front wheel drive using speed ratio |
Also Published As
Publication number | Publication date |
---|---|
JPH0723061B2 (en) | 1995-03-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |