JPS5153326A - - Google Patents

Info

Publication number
JPS5153326A
JPS5153326A JP50107588A JP10758875A JPS5153326A JP S5153326 A JPS5153326 A JP S5153326A JP 50107588 A JP50107588 A JP 50107588A JP 10758875 A JP10758875 A JP 10758875A JP S5153326 A JPS5153326 A JP S5153326A
Authority
JP
Japan
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.)
Pending
Application number
JP50107588A
Inventor
Yuujinu Hitsukusu Reon
Areen Piitaason Uein
Furanshisu Sushetsuku Roorensu
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor Co
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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of JPS5153326A publication Critical patent/JPS5153326A/ja
Pending 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
    • B62D12/00—Steering specially adapted for vehicles operating in tandem or having pivotally connected frames
    • 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
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5157—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/52—Pressure control characterised by the type of actuation
    • F15B2211/528—Pressure control characterised by the type of actuation actuated by fluid pressure
    • 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
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
    • F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle valves

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)
JP50107588A 1974-09-09 1975-09-06 Pending JPS5153326A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/504,055 US3935918A (en) 1974-09-09 1974-09-09 Dual source hydraulic steering system

Publications (1)

Publication Number Publication Date
JPS5153326A true JPS5153326A (ja) 1976-05-11

Family

ID=24004672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50107588A Pending JPS5153326A (ja) 1974-09-09 1975-09-06

Country Status (5)

Country Link
US (1) US3935918A (ja)
JP (1) JPS5153326A (ja)
BR (1) BR7503850A (ja)
CA (1) CA1027827A (ja)
GB (1) GB1461054A (ja)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE399679B (sv) * 1976-02-27 1978-02-27 Volvo Bm Dubblerat styrsystem for fordon
GB1593974A (en) * 1976-10-11 1981-07-22 Cam Gears Ltd Powerassisted steering system
US4076096A (en) * 1976-11-24 1978-02-28 Clark Equipment Company Hydraulic steering system
US4318451A (en) * 1980-05-27 1982-03-09 The Warner & Swasey Company Dual function remote steering control
US4762195A (en) * 1987-09-02 1988-08-09 Dana Corporation Hydraulic steering system
EP0770015B1 (de) * 1994-07-08 1998-09-16 O & K Orenstein & Koppel Ag Verfahren zur betätigung der lenkzylinder mobiler arbeitsmaschinen sowie lenksystem für mobile arbeitsmaschinen
US5507360A (en) * 1994-10-24 1996-04-16 Caterpillar Inc. Hydraulic system for dynamic braking and secondary steering system supply
CN100510480C (zh) * 2002-04-10 2009-07-08 卢克摩擦片和离合器两合公司 液压系统及自动变速器
US6966398B2 (en) * 2003-03-26 2005-11-22 Trw Automotive U.S. Llc Apparatus for controlling a power-assisted steering gear in response to vehicle speed
DE102004041703B4 (de) * 2004-08-28 2007-12-06 Sauer-Danfoss Aps Hydraulische Lenkung eines Fahrzeugs
NL1031927C2 (nl) * 2006-05-31 2007-12-03 Actuant Corp Hydraulische bedieningsinrichting voor een afsluitsamenstel van een motorvoertuig.
CN102155448A (zh) * 2011-03-23 2011-08-17 镇江液压件厂有限责任公司 扭矩放大装置
GB2509186A (en) * 2012-12-21 2014-06-25 Agco Netherlands Bv Emergency steering mode of a vehicle hydraulic system having a first pump driven by a prime mover and a second pump driven by a ground engaging member
US9867325B2 (en) 2014-04-29 2018-01-16 Cnh Industrial America Llc Work vehicle with hydraulic assist for power off steering
US9797116B2 (en) * 2015-11-05 2017-10-24 Caterpillar Inc. Device and process for controlling and optimizing hydraulic system performance
CN105971950B (zh) * 2016-06-28 2017-10-03 潍柴动力股份有限公司 恒速液压控制装置、搅拌车及恒速液压控制方法
CN110920749B (zh) * 2019-12-16 2021-03-09 徐州重型机械有限公司 转向系统、操作方法及工程车辆
US11731690B2 (en) 2020-02-12 2023-08-22 Caterpillar Inc. Redundant steering system and machines and methods thereof
CN112319606B (zh) * 2020-11-06 2021-10-22 厦门金龙汽车新能源科技有限公司 一种电动客车双油泵系统及其控制方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424262A (en) * 1967-07-24 1969-01-28 Schmidt Karl Heinz Hydraulic power steering mechanism for a road vehicle
US3653209A (en) * 1970-08-31 1972-04-04 Bendix Corp Vehicle hydraulic system
US3719249A (en) * 1971-03-05 1973-03-06 Gen Signal Corp Power steering system affording emergency steering capability
US3838570A (en) * 1973-09-10 1974-10-01 Parker Hannifin Corp Directional control valve

Also Published As

Publication number Publication date
US3935918A (en) 1976-02-03
GB1461054A (en) 1977-01-13
AU8055775A (en) 1976-11-04
CA1027827A (en) 1978-03-14
BR7503850A (pt) 1976-08-03

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