GB2005611A - Control valves for power steering - Google Patents

Control valves for power steering

Info

Publication number
GB2005611A
GB2005611A GB7838862A GB7838862A GB2005611A GB 2005611 A GB2005611 A GB 2005611A GB 7838862 A GB7838862 A GB 7838862A GB 7838862 A GB7838862 A GB 7838862A GB 2005611 A GB2005611 A GB 2005611A
Authority
GB
United Kingdom
Prior art keywords
pipe
throttles
throttle
working
branch point
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
Application number
GB7838862A
Other versions
GB2005611B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of GB2005611A publication Critical patent/GB2005611A/en
Application granted granted Critical
Publication of GB2005611B publication Critical patent/GB2005611B/en
Expired legal-status Critical Current

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)
  • Multiple-Way Valves (AREA)
  • Actuator (AREA)

Abstract

In a control valve for power- assisted steering systems with an unbalanced working cylinder, a differential pressure in the two working cylinders (11, 11') of the unbalanced working cylinder is obtained by two throttles (16a, 16b). One throttle (16a) is arranged between a branch point (13) of a pipe (10) from a flow control edge (9) to the smaller surface working chamber (11) and a return pipe (15). The other throttle (16b) which may be of equal or unequal size to the throttle (16a), is arranged downstream of a flow pipe (8) of the working medium and upstream of a branch point (13') of a pipe (10') leading to the larger surface working chamber 11' or to a control edge (14'). The throttles may be constrictions in the pipes (10, 10'), or attached directly to the pistons (4), or machined into a bore surface of the valve housing. The throttles may be annular, bevel-shaped or of planar construction. <IMAGE>
GB7838862A 1977-10-13 1978-10-02 Control valves for power-assisted steering systems Expired GB2005611B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2745987A DE2745987C2 (en) 1977-10-13 1977-10-13 Hydraulic power steering, in particular for motor vehicles

Publications (2)

Publication Number Publication Date
GB2005611A true GB2005611A (en) 1979-04-25
GB2005611B GB2005611B (en) 1982-05-12

Family

ID=6021313

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838862A Expired GB2005611B (en) 1977-10-13 1978-10-02 Control valves for power-assisted steering systems

Country Status (9)

Country Link
JP (1) JPS5464333A (en)
BR (1) BR7806744A (en)
CS (1) CS222667B2 (en)
DE (1) DE2745987C2 (en)
ES (1) ES474117A1 (en)
FR (1) FR2405855A1 (en)
GB (1) GB2005611B (en)
IT (1) IT1106180B (en)
SE (1) SE439910B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463039A1 (en) * 1979-08-01 1981-02-20 Zahnradfabrik Friedrichshafen METHOD AND DEVICE FOR REALIZING A HYDRAULIC ASSISTANCE FOR STEERING CONTROL
EP0040024A1 (en) * 1980-05-14 1981-11-18 CAM GEARS Limited Power assisted vehicle steering system
FR2507143A1 (en) * 1981-06-05 1982-12-10 Zahnradfabrik Friedrichshafen HYDRAULIC STEERING, IN PARTICULAR FOR TOURISM CARS AND LIGHT COMMERCIAL VEHICLES

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508566A1 (en) * 1979-11-26 1982-12-31 Dba Control flow distributor for hydraulic servo steering - has sleeve with flow ports and internal control piston, forming pressure control follower
US4587886A (en) * 1983-04-28 1986-05-13 Jidosha Kiki Co., Ltd. Power steering device
JPS6133368A (en) * 1984-07-26 1986-02-17 Atsugi Motor Parts Co Ltd Power steering

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1153774A (en) * 1955-06-10 1958-03-21 Differential piston servo motor, in particular for motor vehicle steering gears
GB796194A (en) * 1956-01-05 1958-06-04 Dewandre Co Ltd C Improvements in or relating to power-assisted steering mechanisms for road vehicles
US3556155A (en) * 1969-01-24 1971-01-19 Caterpillar Tractor Co Variable flow-modulated valve
JPS4920664U (en) * 1972-05-26 1974-02-21
FR2270467B1 (en) * 1974-03-29 1977-09-30 Mercier Bernard
JPS5428735Y2 (en) * 1974-08-15 1979-09-14

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2463039A1 (en) * 1979-08-01 1981-02-20 Zahnradfabrik Friedrichshafen METHOD AND DEVICE FOR REALIZING A HYDRAULIC ASSISTANCE FOR STEERING CONTROL
GB2055718A (en) * 1979-08-01 1981-03-11 Zahnradfabrik Friedrichshafen Hydraulic assistance of a steering handwheel
EP0040024A1 (en) * 1980-05-14 1981-11-18 CAM GEARS Limited Power assisted vehicle steering system
FR2507143A1 (en) * 1981-06-05 1982-12-10 Zahnradfabrik Friedrichshafen HYDRAULIC STEERING, IN PARTICULAR FOR TOURISM CARS AND LIGHT COMMERCIAL VEHICLES

Also Published As

Publication number Publication date
ES474117A1 (en) 1979-05-01
BR7806744A (en) 1979-05-08
DE2745987A1 (en) 1979-04-19
DE2745987C2 (en) 1982-10-21
SE7810507L (en) 1979-04-14
IT7851392A0 (en) 1978-10-05
IT1106180B (en) 1985-11-11
SE439910B (en) 1985-07-08
FR2405855B1 (en) 1984-08-24
GB2005611B (en) 1982-05-12
FR2405855A1 (en) 1979-05-11
JPS6257545B2 (en) 1987-12-01
CS222667B2 (en) 1983-07-29
JPS5464333A (en) 1979-05-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921002