WO2002090163A3 - Hydraulic vehicle retarder and method of controlling such retarder - Google Patents

Hydraulic vehicle retarder and method of controlling such retarder Download PDF

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Publication number
WO2002090163A3
WO2002090163A3 PCT/SE2002/000878 SE0200878W WO02090163A3 WO 2002090163 A3 WO2002090163 A3 WO 2002090163A3 SE 0200878 W SE0200878 W SE 0200878W WO 02090163 A3 WO02090163 A3 WO 02090163A3
Authority
WO
WIPO (PCT)
Prior art keywords
retarder
pressure
control unit
valve
values
Prior art date
Application number
PCT/SE2002/000878
Other languages
French (fr)
Other versions
WO2002090163A2 (en
Inventor
Marcus Steen
Bengt Samuelsson
Original Assignee
Volvo Lastvagnar Ab
Marcus Steen
Bengt Samuelsson
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 Volvo Lastvagnar Ab, Marcus Steen, Bengt Samuelsson filed Critical Volvo Lastvagnar Ab
Publication of WO2002090163A2 publication Critical patent/WO2002090163A2/en
Publication of WO2002090163A3 publication Critical patent/WO2002090163A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
    • B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

Hydraulic retarder installation with a retarder which is controlled by an electronic control unit (8), which regulates, via an electrically operated proportional valve (9), the air pressure in a hydraulic fluid reservoir (6), said pressure determining the braking torque. In the control unit there are stores command values of the pressure at a number of levels and values of the electric current through the valve at these levels. The control unit is disposed, upon activation of the retarder, by utilizing the stored electric current values and feed back of the measured air pressure on the outlet side of the proportional valve, to control the valve towards a pressure, which corresponds in turn to the requested braking torque.
PCT/SE2002/000878 2001-05-10 2002-05-07 Hydraulic vehicle retarder and method of controlling such retarder WO2002090163A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0101637-7 2001-05-10
SE0101637A SE523147C2 (en) 2001-05-10 2001-05-10 Hydraulic vehicle retarders and ways to control them

Publications (2)

Publication Number Publication Date
WO2002090163A2 WO2002090163A2 (en) 2002-11-14
WO2002090163A3 true WO2002090163A3 (en) 2003-11-27

Family

ID=20284047

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/000878 WO2002090163A2 (en) 2001-05-10 2002-05-07 Hydraulic vehicle retarder and method of controlling such retarder

Country Status (2)

Country Link
SE (1) SE523147C2 (en)
WO (1) WO2002090163A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4688384A (en) * 1985-04-15 1987-08-25 The Jacobs Manufacturing Company Braking boost pressure modulator and method
US5771997A (en) * 1994-11-26 1998-06-30 Voith Turbo Gmbh Braking system in conjunction with a hydrodynamic retarder, specifically for motor vehicles
DE19848546C1 (en) * 1998-10-22 2000-04-20 Voith Turbo Kg Vehicle hydrodynamic retarder control method provides over-pressure during initial timed interval before reduction to network pressure over second timed interval
EP1063137A2 (en) * 1999-06-25 2000-12-27 Voith Turbo GmbH & Co. KG Valve device for controlling the operation of an hydrodynamic retarder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4688384A (en) * 1985-04-15 1987-08-25 The Jacobs Manufacturing Company Braking boost pressure modulator and method
US5771997A (en) * 1994-11-26 1998-06-30 Voith Turbo Gmbh Braking system in conjunction with a hydrodynamic retarder, specifically for motor vehicles
DE19848546C1 (en) * 1998-10-22 2000-04-20 Voith Turbo Kg Vehicle hydrodynamic retarder control method provides over-pressure during initial timed interval before reduction to network pressure over second timed interval
EP1063137A2 (en) * 1999-06-25 2000-12-27 Voith Turbo GmbH & Co. KG Valve device for controlling the operation of an hydrodynamic retarder

Also Published As

Publication number Publication date
SE0101637D0 (en) 2001-05-10
SE523147C2 (en) 2004-03-30
SE0101637L (en) 2002-11-11
WO2002090163A2 (en) 2002-11-14

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