GB1114779A - Improvements in control means for hydraulic power-assisted systems,with particular reference to steering gears - Google Patents
Improvements in control means for hydraulic power-assisted systems,with particular reference to steering gearsInfo
- Publication number
- GB1114779A GB1114779A GB4312965A GB4312965A GB1114779A GB 1114779 A GB1114779 A GB 1114779A GB 4312965 A GB4312965 A GB 4312965A GB 4312965 A GB4312965 A GB 4312965A GB 1114779 A GB1114779 A GB 1114779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- steering
- orifices
- ports
- servo
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
1,114,779. Power-assisted steering. CAMGEARS (CLEVEDON) Ltd. 18 Oct., 1966 [11 Oct., 1965], No. 43129/65. Heading B7H. A control means for use in an hydraulic power-assisted steering or other hydraulic system has a torsionbar 6 which transmits rotary motion between first and second parts 1a 9 of the system and has valve members 10 formed thereon, which are rotatable with the second part 9 and co-operate with two fluid-flow orifices 11 in a valve body 1 rotatable with said first part 1 to vary the pressure in two opposed hydraulic operating circuits. As shown, the first part 1a is secured to a steering shaft 12, the second part 9 rotates a pinion 22 in mesh with a steering rack 23 and the two opposed hydraulic operating circuits communicate with opposite sides of a servo piston through ports 21. In the neutral steering position pressure fluid-flow from inlet 17 is divided equally by axiallybored shuttle valve 16 and passes to the orifices 11 through respective annular passages 14 and axial passages 13 of the valve body 1. The exhaust from the orifices passes back to the pump supplying the inlet 17. On relative rotation of the valve parts during steering movements (Fig. 4), the portion 10 of the torsion-bar 6 acts as a flap valve producing at the orifices 11 a differential pressure which is communicated through drillings 13 and annuli 14 to the ports 21 to move the servo-piston and through the drillings 14 and ports 18 to the opposite sides of the shuttle valve which moves so as to provide a greater flow to the high pressure side of the servo-piston. In modifications, shuttle valve (30) is provided with bores (34) through the lands and ends which coact with coaxial bores in the valve housing (Fig. 5, not shown), or two constant output fluid supply pumps are provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4312965A GB1114779A (en) | 1965-10-11 | 1965-10-11 | Improvements in control means for hydraulic power-assisted systems,with particular reference to steering gears |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4312965A GB1114779A (en) | 1965-10-11 | 1965-10-11 | Improvements in control means for hydraulic power-assisted systems,with particular reference to steering gears |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1114779A true GB1114779A (en) | 1968-05-22 |
Family
ID=10427440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4312965A Expired GB1114779A (en) | 1965-10-11 | 1965-10-11 | Improvements in control means for hydraulic power-assisted systems,with particular reference to steering gears |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1114779A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2336480A1 (en) * | 1972-07-19 | 1974-01-31 | Bendix Westinghouse Ltd | HYDRAULIC SERVO CONTROL DEVICE |
DE2616421A1 (en) * | 1975-04-15 | 1976-11-04 | Bendix Westinghouse Ltd | PRESSURE ASSISTED CONTROL DEVICE |
WO1993019971A1 (en) * | 1992-04-01 | 1993-10-14 | Zf Friedrichshafen Ag | Rotary slide valve for power-assisted steering of motor vehicles |
-
1965
- 1965-10-11 GB GB4312965A patent/GB1114779A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2336480A1 (en) * | 1972-07-19 | 1974-01-31 | Bendix Westinghouse Ltd | HYDRAULIC SERVO CONTROL DEVICE |
FR2193152A1 (en) * | 1972-07-19 | 1974-02-15 | Bendix Westinghouse Ltd | |
DE2616421A1 (en) * | 1975-04-15 | 1976-11-04 | Bendix Westinghouse Ltd | PRESSURE ASSISTED CONTROL DEVICE |
WO1993019971A1 (en) * | 1992-04-01 | 1993-10-14 | Zf Friedrichshafen Ag | Rotary slide valve for power-assisted steering of motor vehicles |
US5538096A (en) * | 1992-04-01 | 1996-07-23 | Zf Friedrichshafen Ag | Rotary slide valve for auxiliary power steering systems in motor vehicles |
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