FR2449572A1 - Dispositif d'assistance hydraulique a changement de rapport - Google Patents

Dispositif d'assistance hydraulique a changement de rapport

Info

Publication number
FR2449572A1
FR2449572A1 FR8003920A FR8003920A FR2449572A1 FR 2449572 A1 FR2449572 A1 FR 2449572A1 FR 8003920 A FR8003920 A FR 8003920A FR 8003920 A FR8003920 A FR 8003920A FR 2449572 A1 FR2449572 A1 FR 2449572A1
Authority
FR
France
Prior art keywords
ratio
assistance device
gear change
established
manual operation
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
FR8003920A
Other languages
English (en)
French (fr)
Other versions
FR2449572B1 (OSRAM
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.)
Motors Liquidation Co
Original Assignee
General Motors Corp
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 General Motors Corp filed Critical General Motors Corp
Publication of FR2449572A1 publication Critical patent/FR2449572A1/fr
Application granted granted Critical
Publication of FR2449572B1 publication Critical patent/FR2449572B1/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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/14—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/143—Master cylinder mechanically coupled with booster
    • B60T13/144—Pilot valve provided inside booster piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
  • Control Of Transmission Device (AREA)
FR8003920A 1979-02-22 1980-02-22 Dispositif d'assistance hydraulique a changement de rapport Granted FR2449572A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/013,880 US4237772A (en) 1979-02-22 1979-02-22 Hydraulic ratio-changing booster with hydraulic lock

Publications (2)

Publication Number Publication Date
FR2449572A1 true FR2449572A1 (fr) 1980-09-19
FR2449572B1 FR2449572B1 (OSRAM) 1983-03-25

Family

ID=21762272

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8003920A Granted FR2449572A1 (fr) 1979-02-22 1980-02-22 Dispositif d'assistance hydraulique a changement de rapport

Country Status (4)

Country Link
US (1) US4237772A (OSRAM)
DE (1) DE3002755A1 (OSRAM)
FR (1) FR2449572A1 (OSRAM)
GB (1) GB2043193B (OSRAM)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4294071A (en) * 1979-12-12 1981-10-13 Midland-Ross Corporation Hydraulic booster travel ratio check valve
GB2113331B (en) * 1982-01-19 1985-09-11 Automotive Prod Co Ltd Vehicle brake booster
DE3338322A1 (de) * 1983-10-21 1985-05-02 Alfred Teves Gmbh, 6000 Frankfurt Druckmittelbetaetigbare fahrzeugbremsanlage
DE3438112A1 (de) * 1984-10-18 1986-04-24 Alfred Teves Gmbh, 6000 Frankfurt Hydraulischer kraftverstaerker
DE3726525A1 (de) * 1987-08-10 1989-02-23 Teves Gmbh Alfred Vorrichtung zur uebersetzung eines hydraulischen drucks in eine translatorische kraft
DE3728921A1 (de) * 1987-08-29 1989-03-09 Bosch Gmbh Robert Bremszylinder
US9592811B2 (en) * 2015-03-14 2017-03-14 Yangzhou Taibo Automotive Electronics Intelligent Technology Company, Ltd Electro-hydraulic brake system with electric power assist and by-wire braking

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253409A (en) * 1964-08-05 1966-05-31 Gen Motors Corp Hydraulic fluid viscosity compensation mechanism for a hydraulic power booster
FR2138959A1 (OSRAM) * 1971-05-25 1973-01-05 Bendix Gmbh
FR2156654A1 (OSRAM) * 1971-10-01 1973-06-01 Bendix Corp
FR2209902A2 (OSRAM) * 1971-05-25 1974-07-05 Bendix Gmbh
DE2318447A1 (de) * 1973-04-12 1974-10-31 Bendix Gmbh Servoverstaerker
US3896620A (en) * 1974-01-14 1975-07-29 Gen Motors Corp Two-stage accumulator valve
DE2503870A1 (de) * 1974-01-30 1975-07-31 Girling Ltd Mit fremdkraft betaetigter hydraulischer bremsverstaerker fuer eine fahrzeugbremsanlage
US3988967A (en) * 1975-07-10 1976-11-02 The Weatherhead Company Brake booster with hydraulic ratio changer
US4007665A (en) * 1975-11-28 1977-02-15 The Weatherhead Company Brake booster with improved pedal feel characteristics
DE2462525A1 (de) * 1973-07-11 1977-06-08 Tokico Ltd Hydraulischer bremskraftverstaerker fuer kraftfahrzeuge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3915066A (en) * 1972-12-08 1975-10-28 Bendix Gmbh Power boost mechanism

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253409A (en) * 1964-08-05 1966-05-31 Gen Motors Corp Hydraulic fluid viscosity compensation mechanism for a hydraulic power booster
FR2138959A1 (OSRAM) * 1971-05-25 1973-01-05 Bendix Gmbh
FR2209902A2 (OSRAM) * 1971-05-25 1974-07-05 Bendix Gmbh
FR2156654A1 (OSRAM) * 1971-10-01 1973-06-01 Bendix Corp
DE2318447A1 (de) * 1973-04-12 1974-10-31 Bendix Gmbh Servoverstaerker
DE2462525A1 (de) * 1973-07-11 1977-06-08 Tokico Ltd Hydraulischer bremskraftverstaerker fuer kraftfahrzeuge
US3896620A (en) * 1974-01-14 1975-07-29 Gen Motors Corp Two-stage accumulator valve
DE2503870A1 (de) * 1974-01-30 1975-07-31 Girling Ltd Mit fremdkraft betaetigter hydraulischer bremsverstaerker fuer eine fahrzeugbremsanlage
US3988967A (en) * 1975-07-10 1976-11-02 The Weatherhead Company Brake booster with hydraulic ratio changer
US4007665A (en) * 1975-11-28 1977-02-15 The Weatherhead Company Brake booster with improved pedal feel characteristics

Also Published As

Publication number Publication date
DE3002755A1 (de) 1980-09-04
GB2043193B (en) 1982-12-08
US4237772A (en) 1980-12-09
FR2449572B1 (OSRAM) 1983-03-25
GB2043193A (en) 1980-10-01

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Legal Events

Date Code Title Description
ST Notification of lapse