GB1469458A - Automatic emergency valves - Google Patents

Automatic emergency valves

Info

Publication number
GB1469458A
GB1469458A GB2533974A GB2533974A GB1469458A GB 1469458 A GB1469458 A GB 1469458A GB 2533974 A GB2533974 A GB 2533974A GB 2533974 A GB2533974 A GB 2533974A GB 1469458 A GB1469458 A GB 1469458A
Authority
GB
United Kingdom
Prior art keywords
piston
consumer
communicated
main pump
delivery
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
GB2533974A
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 GB1469458A publication Critical patent/GB1469458A/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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
    • B62D5/32—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means for telemotor systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2564—Plural inflows
    • Y10T137/2572—One inflow supplements another
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2574—Bypass or relief controlled by main line fluid condition
    • Y10T137/2579—Flow rate responsive
    • Y10T137/2587—Bypass or relief valve biased open

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Multiple-Way Valves (AREA)
  • Power Steering Mechanism (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Servomotors (AREA)
  • Safety Valves (AREA)

Abstract

1469458 Valves ZAHNRADFABRIK FRIEDRICHSHAFEN AG 7 June 1974 [8 June 1973] 25339/74 Heading F2V An automatic emergency valve for hydraulic systems, especially for hydraulic steering mechanisms of motor vehicles, comprises a control piston 3, Fig. 1, spring-biased to the neutral position shown in a housing 1 having connections 6, 11, 13, 14 for a main pump 7, reserve pump 12, consumer 8 and a tank 15 respectively. A chamber 4 at one end of the piston is communicated with the main pump connection 6 whereas a chamber 5 at the other end of the piston contains the biasing spring 10 and is communicated with the consumer. Moreover the chambers 4, 5 are communicated with one another via an axial bore 19 and throttle 22 in the piston. Thus, in use, the piston is initially in its neutral position shown wherein the small initial delivery from the main pump passes to the consumer via the axial bore 19, throttle 22 and non-return valve 23, and the delivery from the reserve pump passes to the consumer via control edges B1 and non-return valve 24. However, the increasing delivery from the main pump increases the pressure differential between the chambers 4, 5 so that the piston moves leftwards. Thus the control edges C1 open and the control edges B1 close causing the reserve pump delivery to be returned to the tank. Further piston movement opens the control edges A1 to provide an additional flow path between the main pump and consumer via non-return valve 24. However subsequent fall in main pump delivery results in the reserve pump being reconnected with the consumer via the non-return valve 24. In an alternative embodiment, Fig. 2 (not shown), the axial bore in the piston is instead communicated with a peripheral groove (25) in the piston via a radial throttle (122), and the groove (25) is communicated with the consumer (108) and the spring-containing chamber (105) via further control edges (D2) after a small leftward movement of the piston from its neutral position.
GB2533974A 1973-06-08 1974-06-07 Automatic emergency valves Expired GB1469458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2329328A DE2329328C2 (en) 1973-06-08 1973-06-08 Automatic sequence valve

Publications (1)

Publication Number Publication Date
GB1469458A true GB1469458A (en) 1977-04-06

Family

ID=5883480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2533974A Expired GB1469458A (en) 1973-06-08 1974-06-07 Automatic emergency valves

Country Status (10)

Country Link
US (1) US3882678A (en)
JP (1) JPS5818521B2 (en)
BR (1) BR7404655D0 (en)
DE (1) DE2329328C2 (en)
ES (1) ES426731A1 (en)
FR (1) FR2232715B1 (en)
GB (1) GB1469458A (en)
IT (1) IT1013262B (en)
SE (1) SE398623B (en)
YU (1) YU39071B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171778A (en) * 1985-03-01 1986-09-03 Coal Ind Hydraulic valve units for determining the operational condition of hydraulic circuits

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2512432A1 (en) * 1975-03-21 1976-09-30 Zahnradfabrik Friedrichshafen VALVE FOR HYDRAULIC SYSTEMS
DE2518738A1 (en) * 1975-04-26 1976-11-04 Zahnradfabrik Friedrichshafen VALVE FOR HYDRAULIC SYSTEMS
JPS5345379U (en) * 1976-09-20 1978-04-18
DE2731975C3 (en) * 1977-07-15 1980-08-28 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Power steering for motor vehicles
US4275865A (en) * 1977-08-24 1981-06-30 Lucas Industries Limited Fluid control valves
JPS5464332A (en) * 1977-10-17 1979-05-24 Honda Motor Co Ltd Automotive power steering device
DE2800405C2 (en) * 1978-01-05 1986-10-02 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Hydraulic power steering for motor vehicles with a switching valve for connecting a reserve pump
DE2814163A1 (en) * 1978-04-01 1979-10-11 Teves Gmbh Alfred EMERGENCY SUPPLY SYSTEM
DE2825578C2 (en) * 1978-06-10 1984-01-26 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Automatic sequence valve for hydraulic systems
JPS55139531A (en) * 1979-04-13 1980-10-31 Akebono Brake Ind Co Ltd Method of preventing generation of noise at actuating disk brake and disk brake capable of preventing generation of noise at actuating brake
DE2924222C2 (en) * 1979-06-15 1985-09-05 Pierburg Gmbh & Co Kg, 4040 Neuss Control valve arrangement for a device for generating negative pressure for negative pressure consuming systems
US4357995A (en) * 1980-12-22 1982-11-09 Westinghouse Electric Corp. Hydraulic system including oil replenishment for multi-stage hydraulic jack
DE3210759A1 (en) * 1981-09-17 1983-10-06 Walter Schopf Pump combination with flow control device
JPH0629040B2 (en) * 1984-10-11 1994-04-20 光洋精工株式会社 Hydraulic reaction force control device for power steering device
NL8501474A (en) * 1985-05-23 1986-12-16 Dow Chemical Nederland DIVERSION VALVE.
JPS63115935U (en) * 1987-01-20 1988-07-26
JPS63146234U (en) * 1987-03-18 1988-09-27
US6116217A (en) * 1998-09-29 2000-09-12 Stanadyne Automotive Corp. Full authority rail pressure-reduction valve
DE102004058261A1 (en) * 2004-12-03 2006-06-08 Volkswagen Ag Oil pump, has low pressure oil cycle provided with one of pump stages for cooling of motor vehicle gearbox with cooling oil, where oil from low pressure oil cycle is taken out for prefilling clutch with help of quantity switching mechanism
GB0515494D0 (en) * 2005-07-28 2005-08-31 Bamford Excavators Ltd Fluid pumping apparatus
US7415820B2 (en) 2006-02-27 2008-08-26 Gm Global Technology Operations, Inc. Hybrid powertrain with valve assembly for dual pumps
DE102007012716B4 (en) * 2007-03-16 2010-01-28 GM Global Technology Operations, Inc., Detroit Hybrid powertrain with a valve arrangement for two pumps
WO2010038622A1 (en) * 2008-10-01 2010-04-08 株式会社 島津製作所 Flow rate control valve device
US9108476B2 (en) 2012-07-19 2015-08-18 The Goodyear Tire & Rubber Company Bypass air maintenance tire and pump assembly
US9052712B2 (en) * 2012-10-26 2015-06-09 Hamilton Sundstrand Corporation Regulator valve with axial vent
CN104742964A (en) * 2013-12-26 2015-07-01 湖北万山宏业汽车零部件有限公司 Emergent steering system for engineering machinery
US9840273B2 (en) 2015-12-07 2017-12-12 Caterpillar Inc. Electrohydraulic steering system with diagnostics
US10190718B2 (en) 2016-06-08 2019-01-29 Baker Hughes, A Ge Company, Llc Accumulator assembly, pump system having accumulator assembly, and method
CN106286925B (en) * 2016-08-17 2018-11-16 中国航空工业集团公司西安飞行自动控制研究所 A kind of novel voltage stabilizing overflow valve
JP6972608B2 (en) * 2017-03-27 2021-11-24 日本電産トーソク株式会社 Spool valve
CN110318886A (en) * 2019-07-16 2019-10-11 中国航发沈阳发动机研究所 A kind of fuel metering system and its matching process based on duplex gear pump

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440371A (en) * 1946-02-01 1948-04-27 George M Holley Emergency pump
DE2158870C2 (en) * 1971-11-27 1973-09-27 Eaton Gmbh, 5620 Velbert Hydraulic servo system with two pumps and several hydraulic motors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2171778A (en) * 1985-03-01 1986-09-03 Coal Ind Hydraulic valve units for determining the operational condition of hydraulic circuits

Also Published As

Publication number Publication date
FR2232715A1 (en) 1975-01-03
SE7407132L (en) 1974-12-09
DE2329328C2 (en) 1985-03-28
ES426731A1 (en) 1976-07-01
SE398623B (en) 1978-01-09
YU39071B (en) 1984-04-30
JPS5818521B2 (en) 1983-04-13
YU145874A (en) 1982-05-31
JPS5032374A (en) 1975-03-29
US3882678A (en) 1975-05-13
DE2329328A1 (en) 1975-01-02
IT1013262B (en) 1977-03-30
BR7404655D0 (en) 1974-12-03
FR2232715B1 (en) 1981-01-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee