SE0101496L - Hydraulic vehicle retarders - Google Patents

Hydraulic vehicle retarders

Info

Publication number
SE0101496L
SE0101496L SE0101496A SE0101496A SE0101496L SE 0101496 L SE0101496 L SE 0101496L SE 0101496 A SE0101496 A SE 0101496A SE 0101496 A SE0101496 A SE 0101496A SE 0101496 L SE0101496 L SE 0101496L
Authority
SE
Sweden
Prior art keywords
pressure
valve
control unit
tolerance range
alternating current
Prior art date
Application number
SE0101496A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE0101496D0 (en
SE518966C2 (en
Inventor
Bengt Samuelsson
Marcus Steen
Original Assignee
Volvo Lastvagnar Ab
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 filed Critical Volvo Lastvagnar Ab
Priority to SE0101496A priority Critical patent/SE518966C2/en
Publication of SE0101496D0 publication Critical patent/SE0101496D0/en
Priority to PCT/SE2002/000811 priority patent/WO2002087940A1/en
Publication of SE0101496L publication Critical patent/SE0101496L/en
Publication of SE518966C2 publication Critical patent/SE518966C2/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)
  • Braking Arrangements (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. The control unit controls the valve by sending out a control current with a superimposed alternating current, which gives the valve spool of the valve a reciprocating movement with short strokes, when the momentary pressure lies outside the tolerance range for predetermined pressure. When the momentary pressure is within the tolerance range, the superimposed alternating current is adjusted down to a predetermined value, which can be zero.
SE0101496A 2001-04-27 2001-04-27 Hydraulic vehicle retarders SE518966C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE0101496A SE518966C2 (en) 2001-04-27 2001-04-27 Hydraulic vehicle retarders
PCT/SE2002/000811 WO2002087940A1 (en) 2001-04-27 2002-04-25 Hydraulic vehicle retarder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0101496A SE518966C2 (en) 2001-04-27 2001-04-27 Hydraulic vehicle retarders

Publications (3)

Publication Number Publication Date
SE0101496D0 SE0101496D0 (en) 2001-04-27
SE0101496L true SE0101496L (en) 2002-10-28
SE518966C2 SE518966C2 (en) 2002-12-10

Family

ID=20283926

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0101496A SE518966C2 (en) 2001-04-27 2001-04-27 Hydraulic vehicle retarders

Country Status (2)

Country Link
SE (1) SE518966C2 (en)
WO (1) WO2002087940A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0202889D0 (en) * 2002-10-01 2002-10-01 Volvo Lastvagnar Ab Measuring device for a hydraulic retarder in a motor vehicle
CN109552295B (en) * 2017-09-25 2021-05-04 现代摩比斯株式会社 Apparatus and method for controlling current of solenoid valve of brake system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2855654C2 (en) * 1978-12-22 1982-09-23 Voith Getriebe Kg, 7920 Heidenheim Hydrodynamic brake
DE3040790A1 (en) * 1980-10-30 1982-06-09 Voith Getriebe Kg, 7920 Heidenheim HYDRODYNAMIC TORQUE TRANSMISSION UNIT, IN PARTICULAR HYDRODYNAMIC BRAKE
JP2816489B2 (en) * 1990-04-27 1998-10-27 曙ブレーキ工業株式会社 Retarder control device
DE19923022A1 (en) * 1999-05-19 2000-11-30 Voith Turbo Kg Hydrodynamic retarder and device for the electronic control of a hydrodynamic retarder

Also Published As

Publication number Publication date
SE0101496D0 (en) 2001-04-27
SE518966C2 (en) 2002-12-10
WO2002087940A1 (en) 2002-11-07

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Legal Events

Date Code Title Description
NUG Patent has lapsed