GB1441166A - Control means for hydrostatic steering systems and the like - Google Patents

Control means for hydrostatic steering systems and the like

Info

Publication number
GB1441166A
GB1441166A GB3798973A GB3798973A GB1441166A GB 1441166 A GB1441166 A GB 1441166A GB 3798973 A GB3798973 A GB 3798973A GB 3798973 A GB3798973 A GB 3798973A GB 1441166 A GB1441166 A GB 1441166A
Authority
GB
United Kingdom
Prior art keywords
valve
supply line
metering motor
passage
pressure
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
Application number
GB3798973A
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of GB1441166A publication Critical patent/GB1441166A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • 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
    • B62D5/09—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 means for actuating valves
    • 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
    • B62D5/09—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 means for actuating valves
    • B62D5/093—Telemotor driven by steering wheel movement

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Steering Mechanism (AREA)
  • Check Valves (AREA)
  • Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)

Abstract

1441166 Hydrostatic steering systems DANFOSS AS 10 Aug 1973 [14 Aug 1972] 37989/73 Heading B7H In hydrostatic steering control means 3 having a control valve 14 which is actuated by a followup device 12 in response to rotation of a steering wheel 11 relative to a metering motor 13, transmission of shocks from a steering cylinder 4 back through the metering motor 13 to the steering wheel 11 is prevented by a non-return valve 23 which is located in a supply line 22 from a pump 1 to the valve 14 downstream of a by-pass passage 19 and comprises a closure member 27, Fig. 2, carried by a stem 28 slidably mounted in a valve insert 31, 32, 33 in which there is also mounted an emergency control valve 34 which opens to permit manual actuation of the metering motor if the pump 1 fails. The control valve 14 includes relatively rotatable valve members 15, 16 having neutralposition openings 17 and reversing openings 20, the neutral-position openings co-operating as the valve is displaced from a neutral position to progressively restrict flow through the bypass passage 19 from the supply line 22 to a return line 6, and the reversing openings 20 simultaneously establishing a flow path from the supply line 22 through the metering motor 13 to the steering cylinder 4. The emergency control valve 34 is normally maintained in a closed position by supply line pressure acting on a rear face 44 thereof through a flow-restricting passage 42, but opens automatically when manual actuation of the metering motor 13 creates in the supply line 22 a pressure which is lower than that in the return line. An excess pressure valve 35 normally held closed by a spring 48 is subjected to the pressure in the supply line 22 through the passage 42 and passages 54, 55 in the valve insert and the stem 28. If there is excessive pressure in the supply line 22 the valve 35 opens with the result that the pressure acting on the rear face 44 of the emergency control valve 34 is reduced and that valve opens to provide a large relief flow passage between the supply line 22 and the return line.
GB3798973A 1972-08-14 1973-08-10 Control means for hydrostatic steering systems and the like Expired GB1441166A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722240012 DE2240012C3 (en) 1972-08-14 1972-08-14 Control device for hydrostatic power steering or the like.

Publications (1)

Publication Number Publication Date
GB1441166A true GB1441166A (en) 1976-06-30

Family

ID=5853566

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3798973A Expired GB1441166A (en) 1972-08-14 1973-08-10 Control means for hydrostatic steering systems and the like

Country Status (11)

Country Link
JP (1) JPS5321581B2 (en)
BE (1) BE801957A (en)
CH (1) CH568184A5 (en)
DD (1) DD106314A5 (en)
DE (1) DE2240012C3 (en)
DK (1) DK138362C (en)
FR (1) FR2196621A5 (en)
GB (1) GB1441166A (en)
IT (1) IT991804B (en)
NL (1) NL7311200A (en)
SE (1) SE399394B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000089A (en) * 1977-06-11 1979-01-04 Bendiberica Sa Power steering mechanism
US4532764A (en) * 1983-01-07 1985-08-06 Danfoss A/S Reaction type hydraulic steering control unit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3018792C2 (en) * 1980-05-16 1983-03-31 Danfoss A/S, 6430 Nordborg Hydrostatic control device, in particular steering device
DE3031230C2 (en) * 1980-08-19 1986-03-13 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Hydrostatic power steering device
WO1990008266A1 (en) * 1989-01-21 1990-07-26 Zahnradfabrik Friedrichshafen Ag Device for securing a valve unit in position

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US25126A (en) * 1859-08-16 Churn
US3114242A (en) * 1961-09-05 1963-12-17 Fawick Corp Power steering device with symmetrical valving
DE1270968B (en) * 1966-03-05 1968-06-20 Danfoss As Series connection of at least one hydrostatic steering device with at least one control valve for another hydraulic device
DE1288462B (en) * 1967-01-18 1969-01-30 Zahnradfabrik Friedrichshafen Power steering device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000089A (en) * 1977-06-11 1979-01-04 Bendiberica Sa Power steering mechanism
GB2000089B (en) * 1977-06-11 1982-03-17 Bendiberica Sa Power steering mechanism
US4532764A (en) * 1983-01-07 1985-08-06 Danfoss A/S Reaction type hydraulic steering control unit

Also Published As

Publication number Publication date
DK138362C (en) 1979-02-05
DE2240012C3 (en) 1983-11-03
JPS5321581B2 (en) 1978-07-04
BE801957A (en) 1973-11-05
JPS4957535A (en) 1974-06-04
DE2240012A1 (en) 1974-03-07
FR2196621A5 (en) 1974-03-15
CH568184A5 (en) 1975-10-31
DE2240012B2 (en) 1978-06-29
IT991804B (en) 1975-08-30
NL7311200A (en) 1974-02-18
DD106314A5 (en) 1974-06-12
DK138362B (en) 1978-08-21
SE399394B (en) 1978-02-13

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Legal Events

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