FR2273697A1 - Low volume, high response brake force modulator - with double piston balanced between pneumatic control pressure and axle load pressure - Google Patents

Low volume, high response brake force modulator - with double piston balanced between pneumatic control pressure and axle load pressure

Info

Publication number
FR2273697A1
FR2273697A1 FR7517811A FR7517811A FR2273697A1 FR 2273697 A1 FR2273697 A1 FR 2273697A1 FR 7517811 A FR7517811 A FR 7517811A FR 7517811 A FR7517811 A FR 7517811A FR 2273697 A1 FR2273697 A1 FR 2273697A1
Authority
FR
France
Prior art keywords
pressure
double piston
brake force
balanced
pneumatic control
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.)
Granted
Application number
FR7517811A
Other languages
French (fr)
Other versions
FR2273697B3 (en
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2273697A1 publication Critical patent/FR2273697A1/en
Application granted granted Critical
Publication of FR2273697B3 publication Critical patent/FR2273697B3/fr
Granted legal-status Critical Current

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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1812—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution characterised by the means for pressure reduction
    • B60T8/1825—Means for changing the diaphragm area submitted to pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)

Abstract

Hydraulic brake force regulators which alter the breaking pressure w.r.t. axle loading either require large amounts of fluid or have a large spring pressure, and do not follow dynamic axle loadings fast enough. The invention provides a fast response valve with a double piston. Two small piston faces are balanced between input and output hydraulic brake pressure and a central, larger double piston face, rigidly attached to the other two, is balanced between a reference pneumatic pressure and a variable pneumatic pressure regulated by the axle displacement. The value uses small volumes of fluid and the two small piston faces are connected by a pressure limiting valve.
FR7517811A 1974-06-06 1975-06-06 Low volume, high response brake force modulator - with double piston balanced between pneumatic control pressure and axle load pressure Granted FR2273697A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742427310 DE2427310A1 (en) 1974-06-06 1974-06-06 AUTOMATIC LOAD-DEPENDENT OPERATING HYDRAULIC BRAKE PRESSURE REGULATOR

Publications (2)

Publication Number Publication Date
FR2273697A1 true FR2273697A1 (en) 1976-01-02
FR2273697B3 FR2273697B3 (en) 1978-02-03

Family

ID=5917456

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7517811A Granted FR2273697A1 (en) 1974-06-06 1975-06-06 Low volume, high response brake force modulator - with double piston balanced between pneumatic control pressure and axle load pressure

Country Status (3)

Country Link
DE (1) DE2427310A1 (en)
FR (1) FR2273697A1 (en)
SE (1) SE399847B (en)

Also Published As

Publication number Publication date
FR2273697B3 (en) 1978-02-03
SE7506434L (en) 1975-12-08
SE399847B (en) 1978-03-06
DE2427310A1 (en) 1975-12-18

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Legal Events

Date Code Title Description
ST Notification of lapse