JPH0227961U

JPH0227961U -

Info

Publication number: JPH0227961U
Application number: JP10596888U
Authority: JP
Priority date: 1988-08-12
Filing date: 1988-08-12
Publication date: 1990-02-23

Description

[Brief explanation of drawings]

第１図は本考案の実施例によるブレーキ液圧制
御装置の全体構成図、第２図はその弁機構の拡大
縦断面図、第３図、第４図はそれぞれ第２図の
−線および−線に沿つた横断面図、第５図
および第６図は第２図の弁機構の動作の説明に供
する縦断面図、第７図はインテークスリーブの縦
断面図、第８図は第７図の−線に沿つた断面
図、第９図は第１図の装置によるアンチロツク制
御の説明に供するタイミングチヤート、第１０図
は第１図の装置によるトラクシヨン制御の説明に
供するタイミングチヤートである。１……マスタシリンダ、３……プライマリピス
トン、４……セカンダリピストン、５，６……液
圧室、８，９，１３，１４……ホイールシリンダ
、１１……リザーバ、１８，１９……弁室、２２
……アキユムレータ、２３……液圧ポンプ、３１
，３２……インテークバルブ、３３，３４……イ
ンテークスリーブ、３５，３６……センタバルブ
、３７……ブレーキペダル、５３……補助ピスト
ン、５４……補助液圧室、６３……ピストン、６
８……サポート部。 FIG. 1 is an overall configuration diagram of a brake fluid pressure control device according to an embodiment of the present invention, FIG. 2 is an enlarged longitudinal cross-sectional view of its valve mechanism, and FIGS. 3 and 4 are the - and - lines in FIG. 2, respectively. 5 and 6 are longitudinal sectional views for explaining the operation of the valve mechanism in Fig. 2, Fig. 7 is a longitudinal sectional view of the intake sleeve, and Fig. 8 is a longitudinal sectional view of the intake sleeve. 9 is a timing chart for explaining antilock control by the device shown in FIG. 1, and FIG. 10 is a timing chart for explaining traction control by the device shown in FIG. 1. 1... Master cylinder, 3... Primary piston, 4... Secondary piston, 5, 6... Hydraulic pressure chamber, 8, 9, 13, 14... Wheel cylinder, 11... Reservoir, 18, 19... Valve Room, 22
...Accumulator, 23...Hydraulic pump, 31
, 32... Intake valve, 33, 34... Intake sleeve, 35, 36... Center valve, 37... Brake pedal, 53... Auxiliary piston, 54... Auxiliary hydraulic pressure chamber, 63... Piston, 6
8... Support department.

Claims

[Claims for Utility Model Registration] Equipped with a hold valve and a decay valve for pressurizing, maintaining, or reducing brake fluid pressure during antilock control or traction control,
The hold valve is provided in a first fluid passage that connects the hydraulic pressure chamber of the master cylinder and the wheel cylinder, and the decay valve is provided in a second fluid passage that connects the wheel cylinder and the reservoir. In the pressure control device, a third liquid passage connecting the hydraulic pressure chamber of the master cylinder and the accumulator, and an opening of the third liquid passage communicating with the hydraulic pressure chamber, have a tip end with respect to the hydraulic pressure chamber. an intake valve that is retractable and that normally blocks off the third fluid passage; and an intake valve that is provided on the piston so as to be able to move integrally with the piston of the master cylinder, and that is configured to control the stroke of the piston. a cylindrical valve operating member that engages with the tip of the intake valve protruding into the hydraulic pressure chamber to open the intake valve when the pressure reaches a predetermined value; 1. A brake fluid pressure control device for a vehicle, characterized in that a plurality of support portions are protruded from an outer circumferential surface of the master cylinder so as to be in sliding contact with an inner circumferential surface of the master cylinder.