JPH0227962U

JPH0227962U -

Info

Publication number: JPH0227962U
Application number: JP10596988U
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図はそのインテークバ
ルブの拡大縦断面図、第３図はインテークバルブ
のポペツト部材の正面図、第４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５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、６０……弁座部材、６
３……弁本体、６４……ポペツト部材、６４ｃ，
６４ｄ……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 vertical sectional view of its intake valve, Fig. 3 is a front view of the poppet member of the intake valve, and Fig. 4 is FIG. 5 is a timing chart for explaining antilock control by the device shown in FIG. 1, and FIG. 5 is a timing chart for explaining traction control by the device shown in FIG. 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, 60... Valve seat member, 6
3... Valve body, 64... Poppet member, 64c,
64d... 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 a third liquid passage provided at an end facing the hydraulic pressure chamber of the third liquid passage; an intake valve that blocks a passage; and an intake valve that is provided on the piston so as to be able to move together with the piston of the master cylinder, and that opens the intake valve when the stroke of the piston reaches a predetermined value. The intake valve includes a valve seat surface formed in the housing of the master cylinder, and a valve seat surface that is normally seated to block the third liquid passage. A valve body is formed separately from the valve body, and a tip portion is in contact with the valve body at an opening communicating with the hydraulic pressure chamber of the third liquid passage so as to be retractable from the hydraulic pressure chamber. the poppet member is provided with a plurality of support portions on its outer circumferential surface that are in sliding contact with the inner circumferential surface of the opening; When the poppet member is moved toward the valve body by engaging the tip of the poppet member protruding into the hydraulic pressure chamber, the poppet member is pushed by the poppet member and separated from the valve seat surface, thereby causing the poppet member to move toward the valve body. A brake fluid pressure control device for a vehicle, characterized in that it is configured to open three fluid passages.