CA2235066A1 - Brake control valve - Google Patents

Brake control valve

Info

Publication number
CA2235066A1
CA2235066A1 CA002235066A CA2235066A CA2235066A1 CA 2235066 A1 CA2235066 A1 CA 2235066A1 CA 002235066 A CA002235066 A CA 002235066A CA 2235066 A CA2235066 A CA 2235066A CA 2235066 A1 CA2235066 A1 CA 2235066A1
Authority
CA
Canada
Prior art keywords
pressure chamber
piston
brake pressure
pump
brake
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
CA002235066A
Other languages
French (fr)
Other versions
CA2235066C (en
Inventor
Manfred Becker
Dieter Gawlick
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Publication of CA2235066A1 publication Critical patent/CA2235066A1/en
Application granted granted Critical
Publication of CA2235066C publication Critical patent/CA2235066C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/16—Master control, e.g. master cylinders
    • B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Valve Device For Special Equipments (AREA)
  • Regulating Braking Force (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Abstract

A vehicle brake control valve includes a piston assembly which is movable a stepped cylindrical bore of a valve housing in response to an actuating force against the force of a spring. The piston assembly includes port control edges which control communication between a brake pressure chamber which can be connected to the vehicle brakes, areservoir, and a pump. Both the pump and the actuating force contribute to the brake pressure which builds up in the brake pressure chamber. The piston assembly includes an actuator piston and an annular piston that sealingly slides within a larger portion of the stepped bore. After the actuator piston moves a pre-set distance (H) it carries with it the annular piston. The annular piston, the actuator piston and a wall of the larger diameter portion of the stepped bore enclose a fill pressure chamber which is separated from the brake pressure chamber to achieve two-stage pressure build-up during manual braking (emergency braking) when the pump is inoperative. The fill pressure chamber and the brake pressure chamber are connected to each other via a pressure reducing valve which opens towards the brake pressure chamber.
CA002235066A 1997-06-06 1998-05-13 Brake control valve Expired - Fee Related CA2235066C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19723777.0 1997-06-06
DE19723777A DE19723777C2 (en) 1997-06-06 1997-06-06 Brake valve

Publications (2)

Publication Number Publication Date
CA2235066A1 true CA2235066A1 (en) 1998-12-06
CA2235066C CA2235066C (en) 2001-10-16

Family

ID=7831602

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002235066A Expired - Fee Related CA2235066C (en) 1997-06-06 1998-05-13 Brake control valve

Country Status (5)

Country Link
US (1) US6062654A (en)
EP (1) EP0882633B1 (en)
AT (1) ATE297333T1 (en)
CA (1) CA2235066C (en)
DE (2) DE19723777C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4702584B2 (en) 2001-07-13 2011-06-15 株式会社アドヴィックス Brake hydraulic pressure generator for vehicle, and hydraulic brake device provided with the hydraulic pressure generator
MXPA05008991A (en) * 2003-02-24 2005-10-18 Bendix Commercial Vehicle Sys Electro-pneumatic latching valve system.
US7354118B2 (en) 2005-02-25 2008-04-08 Bendix Commercial Vehicle Systems, Inc. Control valve system
DE102011081872A1 (en) * 2011-08-31 2013-02-28 Robert Bosch Gmbh Master brake cylinder for a hydraulic vehicle brake system
DE102017209114A1 (en) * 2017-05-31 2018-12-06 Robert Bosch Gmbh Master brake cylinder for a hydraulic vehicle brake system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3163007A (en) * 1963-01-04 1964-12-29 Bendix Corp Power brake control valve
US3754793A (en) * 1971-12-03 1973-08-28 Bendix Corp Spring brake control valve
DE2430167C2 (en) * 1974-06-24 1983-10-06 Alfred Teves Gmbh, 6000 Frankfurt Tandem master cylinder for a hydraulic dual-circuit vehicle brake system
DE3222105A1 (en) * 1982-06-11 1983-12-15 Alfred Teves Gmbh, 6000 Frankfurt HYDRAULIC BRAKE SYSTEM WITH SLIP CONTROL
GB2170287B (en) * 1985-01-25 1988-08-03 Teves Gmbh Alfred Hydraulic brake system
DE3539277A1 (en) * 1985-11-06 1987-05-14 Teves Gmbh Alfred BRAKE PRESSURE SENSOR FOR A HYDRAULIC MOTOR VEHICLE BRAKE SYSTEM
DE3542418A1 (en) * 1985-11-30 1987-06-04 Teves Gmbh Alfred HYDRAULIC POWER AMPLIFIER
DE3543479A1 (en) * 1985-12-09 1987-06-11 Teves Gmbh Alfred BRAKE PRESSURE SENSOR FOR A HYDRAULIC BRAKE SYSTEM, ESPECIALLY FOR MOTOR VEHICLES
DE3545310A1 (en) * 1985-12-20 1987-06-25 Teves Gmbh Alfred HYDRAULIC BRAKE SYSTEM
DE3717547A1 (en) * 1987-05-25 1988-12-15 Teves Gmbh Alfred BRAKE CONTROL DEVICE FOR MOTOR VEHICLES
DE3837650A1 (en) * 1988-11-05 1990-05-10 Deere & Co VALVE
JP2671578B2 (en) * 1990-07-30 1997-10-29 日産自動車株式会社 Brake control device
JPH0577710A (en) * 1991-04-23 1993-03-30 Nissan Motor Co Ltd Brake control device
US5669673A (en) * 1996-04-23 1997-09-23 General Motors Corporation Direct power booster response system

Also Published As

Publication number Publication date
DE19723777C2 (en) 1999-05-27
ATE297333T1 (en) 2005-06-15
DE59812847D1 (en) 2005-07-14
EP0882633B1 (en) 2005-06-08
CA2235066C (en) 2001-10-16
EP0882633A2 (en) 1998-12-09
EP0882633A3 (en) 2001-05-30
US6062654A (en) 2000-05-16
DE19723777A1 (en) 1998-12-10

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed