JPS6421060U - - Google Patents
Info
- Publication number
- JPS6421060U JPS6421060U JP11641187U JP11641187U JPS6421060U JP S6421060 U JPS6421060 U JP S6421060U JP 11641187 U JP11641187 U JP 11641187U JP 11641187 U JP11641187 U JP 11641187U JP S6421060 U JPS6421060 U JP S6421060U
- Authority
- JP
- Japan
- Prior art keywords
- pressure chamber
- valve
- electromagnetic
- passage
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Braking Systems And Boosters (AREA)
- Magnetically Actuated Valves (AREA)
Description
第１図は本考案の一実施例を示す断面図、第２
図は作動説明図である。
１……シエル、２……パワーピストン、４……
定圧室、５……変圧室、６……バルブボデイ、７
……弁機構、１１……弁プランジヤ、１５，１９
……連通路、１６……第１電磁開閉弁、２１……
圧力通路、２５……入力軸、３３……制御装置、
３５……低圧通路、３６……第２電磁開閉弁、３
７……圧力検出器。
Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is an explanatory diagram of the operation. 1...Ciel, 2...Power Piston, 4...
Constant pressure chamber, 5... Variable pressure chamber, 6... Valve body, 7
... Valve mechanism, 11 ... Valve plunger, 15, 19
...Communication path, 16...First electromagnetic on-off valve, 21...
Pressure passage, 25... input shaft, 33... control device,
35...Low pressure passage, 36...Second electromagnetic on-off valve, 3
7...Pressure detector.
Claims (1)
と、このパワーピストン軸部のバルブボデイ内に
収納した弁機構と、上記パワーピストンの作動方
向前方側に形成した定圧室と後方側に形成した変
圧室と、上記定圧室に連通する低圧圧力流体源と
、上記弁機構を介して定圧室と変圧室とを連通す
る連通路と、上記弁機構を介して変圧室と高圧圧
力流体源とを連通する圧力通路と、上記弁機構を
構成する弁プランジヤを作動させて流路を切換え
させ、上記定圧室と変圧室との連通を遮断すると
ともに変圧室に高圧圧力流体を供給してパワーピ
ストンを前進させる入力軸と、上記弁機構よりも
定圧室側において上記連通路を開閉する第１電磁
開閉弁とを備え、該第１電磁開閉弁によつてブレ
ーキ倍力装置の作動中に上記連通路を閉じ、上記
入力軸に加えられた踏力が解放されて上記弁機構
により連通路が開放されても変圧室と定圧室との
連通を遮断させるようにした停車ブレーキ装置に
おいて、 上記変圧室を低圧通路を介して低圧圧力流体源
に連通させるとともに、該低圧通路に上記第１電
磁開閉弁の流路面積よりも小さな流路面積を有す
る第２電磁開閉弁を設け、この第２電磁開閉弁を
上記第１電磁開閉弁に先立つて開放させることを
特徴とする停車ブレーキ装置。[Claim for Utility Model Registration] A power piston slidably disposed within a shell, a valve mechanism housed within a valve body of the power piston shaft, and a constant pressure chamber formed on the front side of the power piston in the operating direction. and a variable pressure chamber formed on the rear side, a low pressure fluid source communicating with the constant pressure chamber, a communication path communicating the constant pressure chamber and the variable pressure chamber via the valve mechanism, and a variable pressure chamber via the valve mechanism. The pressure passage communicating with the high-pressure pressure fluid source and the valve plunger constituting the valve mechanism are operated to switch the flow path, thereby cutting off communication between the constant pressure chamber and the variable pressure chamber, and supplying the high pressure pressure fluid to the variable pressure chamber. an input shaft that supplies power to advance the power piston, and a first electromagnetic on-off valve that opens and closes the communication passage on the constant pressure chamber side of the valve mechanism, and the first electromagnetic on-off valve operates the brake booster. In the parking brake device, the communication passage is closed during operation, and communication between the variable pressure chamber and the constant pressure chamber is cut off even if the pedal force applied to the input shaft is released and the communication passage is opened by the valve mechanism. , the variable pressure chamber is communicated with a low-pressure pressure fluid source via a low-pressure passage, and a second electromagnetic on-off valve having a passage area smaller than that of the first electromagnetic on-off valve is provided in the low-pressure passage; A parking brake device characterized in that a second electromagnetic on-off valve is opened before the first electromagnetic on-off valve is opened.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11641187U JPH042121Y2 (en) | 1987-07-29 | 1987-07-29 | |
| US07/222,657 US4930607A (en) | 1987-07-29 | 1988-07-21 | Vehicular brake holding system |
| AU20191/88A AU587946B2 (en) | 1987-07-29 | 1988-07-29 | Vehicular brake holding system |
| FR888810330A FR2618744B1 (en) | 1987-07-29 | 1988-07-29 | BRAKE HOLDING DEVICE FOR VEHICLE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11641187U JPH042121Y2 (en) | 1987-07-29 | 1987-07-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6421060U true JPS6421060U (en) | 1989-02-02 |
| JPH042121Y2 JPH042121Y2 (en) | 1992-01-24 |
Family
ID=31358922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11641187U Expired JPH042121Y2 (en) | 1987-07-29 | 1987-07-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042121Y2 (en) |
-
1987
- 1987-07-29 JP JP11641187U patent/JPH042121Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH042121Y2 (en) | 1992-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH032706B2 (en) | ||
| US4636008A (en) | Anti-skid braking control system | |
| JPS6421060U (en) | ||
| JP2545900B2 (en) | Brake booster stop and hold device | |
| JPS6114983B2 (en) | ||
| JP2545901B2 (en) | Brake booster stop and hold device | |
| JP2808730B2 (en) | Hydraulic booster device | |
| JPH0224759U (en) | ||
| JP2904237B2 (en) | Booster | |
| JPS6211247Y2 (en) | ||
| JPH0170670U (en) | ||
| JP2976466B2 (en) | Negative pressure booster | |
| JPS5730648A (en) | Servo-brake system | |
| JPH01125257U (en) | ||
| JPH08175375A (en) | Brake device | |
| JPH02110574U (en) | ||
| JPH0360468U (en) | ||
| JPS59202968A (en) | Brake booster device | |
| JPS61150264U (en) | ||
| JPS6365U (en) | ||
| JPS6435173U (en) | ||
| JPH02102870U (en) | ||
| JPH0569034B2 (en) | ||
| JPS6416473U (en) | ||
| JPH03123777U (en) |