WO2013071041A3 - Electro-hydraulic steering system for a mobile application - Google Patents

Electro-hydraulic steering system for a mobile application Download PDF

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Publication number
WO2013071041A3
WO2013071041A3 PCT/US2012/064352 US2012064352W WO2013071041A3 WO 2013071041 A3 WO2013071041 A3 WO 2013071041A3 US 2012064352 W US2012064352 W US 2012064352W WO 2013071041 A3 WO2013071041 A3 WO 2013071041A3
Authority
WO
WIPO (PCT)
Prior art keywords
capacity
pump
variable
steering system
electro
Prior art date
Application number
PCT/US2012/064352
Other languages
French (fr)
Other versions
WO2013071041A2 (en
Inventor
Germano Franzoni
Jarmo Harsia
Leslie CLAAR
Bengt-Goran Persson
Original Assignee
Parker-Hannifin Corporation
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 Parker-Hannifin Corporation filed Critical Parker-Hannifin Corporation
Publication of WO2013071041A2 publication Critical patent/WO2013071041A2/en
Publication of WO2013071041A3 publication Critical patent/WO2013071041A3/en

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
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
    • 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
    • B62D5/065—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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Power Steering Mechanism (AREA)

Abstract

A vehicle steering system including a steering device (20), a position sensor (30) that senses the position of the steering device, and an electronic control unit (40) in operative communication with the position sensor and configured to control the capacity of a variable capacity pump (80) based on output of the sensor is described herein. The variable capacity pump may be a variable displacement pump and the system may also include an electric displacement control adapted to control displacement of the variable displacement pump. The electronic control unit may be configured to determine a rate of change of the position of the steering device, and generate a capacity command signal for controlling the capacity of the variable capacity pump based on the determined rate of change.
PCT/US2012/064352 2011-11-09 2012-11-09 Electro-hydraulic steering system for a mobile application WO2013071041A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161557466P 2011-11-09 2011-11-09
US61/557,466 2011-11-09

Publications (2)

Publication Number Publication Date
WO2013071041A2 WO2013071041A2 (en) 2013-05-16
WO2013071041A3 true WO2013071041A3 (en) 2013-07-04

Family

ID=47430044

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/064352 WO2013071041A2 (en) 2011-11-09 2012-11-09 Electro-hydraulic steering system for a mobile application

Country Status (1)

Country Link
WO (1) WO2013071041A2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926042A1 (en) * 1997-12-16 1999-06-30 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Hydraulic steering system for fork lift truck
EP0962378A2 (en) * 1998-06-01 1999-12-08 Ford Global Technologies, Inc. Method for controlling an electro-hydraulic power assist steering system
DE19919393A1 (en) * 1999-04-28 2000-11-02 Steinbock Boss Gmbh Foerdertec Auxiliary power steering system for fitting to a stacker truck has a hydraulic steering actuator to engage one or more steerable wheels, a steering pump supplying hydraulic liquid and a hydraulic control unit to control its flow.
DE10027888A1 (en) * 1999-07-07 2001-01-18 Toyoda Automatic Loom Works Power steering system determines auxiliary force for changing angle of wheel based on angular speed of steering wheel and steering lock angle of road wheel
EP1607308A2 (en) * 2004-06-15 2005-12-21 ZF Lenksysteme GmbH Power-assisted steering system of a motor vehicle
JP2007320538A (en) * 2006-06-05 2007-12-13 Komatsu Ltd Steering device for vehicle
WO2012062500A1 (en) * 2010-11-10 2012-05-18 Ford Global Technologies, Llc Hydraulic power steering system having assistance force reduction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926042A1 (en) * 1997-12-16 1999-06-30 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Hydraulic steering system for fork lift truck
EP0962378A2 (en) * 1998-06-01 1999-12-08 Ford Global Technologies, Inc. Method for controlling an electro-hydraulic power assist steering system
DE19919393A1 (en) * 1999-04-28 2000-11-02 Steinbock Boss Gmbh Foerdertec Auxiliary power steering system for fitting to a stacker truck has a hydraulic steering actuator to engage one or more steerable wheels, a steering pump supplying hydraulic liquid and a hydraulic control unit to control its flow.
DE10027888A1 (en) * 1999-07-07 2001-01-18 Toyoda Automatic Loom Works Power steering system determines auxiliary force for changing angle of wheel based on angular speed of steering wheel and steering lock angle of road wheel
EP1607308A2 (en) * 2004-06-15 2005-12-21 ZF Lenksysteme GmbH Power-assisted steering system of a motor vehicle
JP2007320538A (en) * 2006-06-05 2007-12-13 Komatsu Ltd Steering device for vehicle
WO2012062500A1 (en) * 2010-11-10 2012-05-18 Ford Global Technologies, Llc Hydraulic power steering system having assistance force reduction

Also Published As

Publication number Publication date
WO2013071041A2 (en) 2013-05-16

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