FR2346193A1 - Hydraulic brake servo with pressure reservoir - has oil pump driven from engine sump and pressure maintained as engine speed drops - Google Patents

Hydraulic brake servo with pressure reservoir - has oil pump driven from engine sump and pressure maintained as engine speed drops

Info

Publication number
FR2346193A1
FR2346193A1 FR7710148A FR7710148A FR2346193A1 FR 2346193 A1 FR2346193 A1 FR 2346193A1 FR 7710148 A FR7710148 A FR 7710148A FR 7710148 A FR7710148 A FR 7710148A FR 2346193 A1 FR2346193 A1 FR 2346193A1
Authority
FR
France
Prior art keywords
servo
engine
hydraulic
reservoir
pressure
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.)
Withdrawn
Application number
FR7710148A
Other languages
French (fr)
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.)
ZF Sachs AG
Original Assignee
Fichtel and Sachs AG
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 Fichtel and Sachs AG filed Critical Fichtel and Sachs AG
Publication of FR2346193A1 publication Critical patent/FR2346193A1/en
Withdrawn legal-status Critical Current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
    • B60T13/148—Arrangements for pressure supply
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/06—Applications or arrangements of reservoirs
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The hydraulic brakes (4, 5) are operated via a servor (2) which is powered hydraulically from the oil circulating pump (15) of the engine (16). A pressure reservoir (13) between the pump and the servo ensures that there is sufficient servo force available when the engine speed drops. The servo hydraulic circuit can be kept separate from the engine oil circulation by a special pump, and with a double reservoir (21). This can have a central reservoir (20) for the servo and a surrounding one for the oil circuit. The system provides max. servo effect at all times. It is more effective than the inlet vacuum servo, especially when an emission control is fitted, which reduces the inlet vacuum level. The oil circuit can also power other hydraulic servos, with suitable protection valves to ensure braking priority on the hydraulic supply.
FR7710148A 1976-03-31 1977-03-25 Hydraulic brake servo with pressure reservoir - has oil pump driven from engine sump and pressure maintained as engine speed drops Withdrawn FR2346193A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762613653 DE2613653A1 (en) 1976-03-31 1976-03-31 BRAKE SYSTEM

Publications (1)

Publication Number Publication Date
FR2346193A1 true FR2346193A1 (en) 1977-10-28

Family

ID=5973915

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7710148A Withdrawn FR2346193A1 (en) 1976-03-31 1977-03-25 Hydraulic brake servo with pressure reservoir - has oil pump driven from engine sump and pressure maintained as engine speed drops

Country Status (3)

Country Link
DE (1) DE2613653A1 (en)
FR (1) FR2346193A1 (en)
IT (1) IT1073498B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB476490A (en) * 1936-06-05 1937-12-06 Matt Payne Improvements in or relating to hydraulic brake operating mechanism for vehicles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB476490A (en) * 1936-06-05 1937-12-06 Matt Payne Improvements in or relating to hydraulic brake operating mechanism for vehicles

Also Published As

Publication number Publication date
DE2613653A1 (en) 1977-10-13
IT1073498B (en) 1985-04-17

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Legal Events

Date Code Title Description
ST Notification of lapse