GB614551A - Improvements in or relating to automatic brake control mechanism for vehicles - Google Patents

Improvements in or relating to automatic brake control mechanism for vehicles

Info

Publication number
GB614551A
GB614551A GB8292/46A GB829246A GB614551A GB 614551 A GB614551 A GB 614551A GB 8292/46 A GB8292/46 A GB 8292/46A GB 829246 A GB829246 A GB 829246A GB 614551 A GB614551 A GB 614551A
Authority
GB
United Kingdom
Prior art keywords
brake
transmission
pressure
hydraulic
pedal
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.)
Expired
Application number
GB8292/46A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor 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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB614551A publication Critical patent/GB614551A/en
Expired 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
    • 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

Abstract

614,551. Controlling motor vehicles. FORD MOTOR CO., Ltd. March 18, 1946, No. 8292. Convention date, April 19, 1945. [Class 79 (v)] [Also in Group XXXIV] In a vehicle having hydraulic transmission and hydraulic brakes, on actuation of the brake pedal wheel brakes and a transmission brake are applied, but on release of the brake pedal the transmission brake is maintained on until subsequent actuation of the accelerator pedal. The arrangement is particularly useful with hydraulic transmission to avoid the vehicle creeping when the engine is running at idling speed in neutral. Fig. 1 shows a transmission system comprising a fly-wheel 15, clutch 27, Fottinger-type hydraulic coupling 11, and gearbox 12 embodying a transmission brake, all as described in Specification 602,020, [Group XXIX]. The transmission brake consists of a brake drum 49 and hydraulically-operated brake band 51. As shown in Fig. 2, depression of the brake pedal 60 transmits hydraulic pressure from the master cylinder 61 to the duct 62 and wheel brakes, and to the duct 64, the chamber 67 of the pressure-maintaining device 63, through the spring-loaded valve 74 to the chamber 68 and thence to duct 82 leading to the transmission brake. On release of the brake pedal, pressure in the ducts 62 and 64 drops to a predetermined minimum as normal and releases the wheel brakes, but pressure in the chamber 68 and in the transmission brake system is allowed to drop only slightly by the annular valve 70 which is backed by spring 73, adjustable by screwed collar 78, and the transmission brake is held on. On depression of the accelerator pedal 65, the shaft 81 and face cam 80 are rotated whereby the plunger 77 is axially displaced to open the valve 74 and release the pressure in the transmission brake system.
GB8292/46A 1945-04-19 1946-03-18 Improvements in or relating to automatic brake control mechanism for vehicles Expired GB614551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US614551XA 1945-04-19 1945-04-19

Publications (1)

Publication Number Publication Date
GB614551A true GB614551A (en) 1948-12-17

Family

ID=22035891

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8292/46A Expired GB614551A (en) 1945-04-19 1946-03-18 Improvements in or relating to automatic brake control mechanism for vehicles

Country Status (1)

Country Link
GB (1) GB614551A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251277A (en) * 1990-12-29 1992-07-01 Dah Tsang Huang Vehicle brake maintaining system
EP2860074A1 (en) * 2013-10-08 2015-04-15 ZF Friedrichshafen AG Hydrodynamic retarder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251277A (en) * 1990-12-29 1992-07-01 Dah Tsang Huang Vehicle brake maintaining system
EP2860074A1 (en) * 2013-10-08 2015-04-15 ZF Friedrichshafen AG Hydrodynamic retarder

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