IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0743658
(2008-11-20)
|
등록번호 |
US-8657388
(2014-02-25)
|
우선권정보 |
DE-10 2007 055 515 (2007-11-21); DE-10 2008 058 240 (2008-11-19) |
국제출원번호 |
PCT/EP2008/065889
(2008-11-20)
|
§371/§102 date |
20100519
(20100519)
|
국제공개번호 |
WO2009/065884
(2009-05-28)
|
발명자
/ 주소 |
- Drumm, Stefan A.
- Schiel, Lothar
|
출원인 / 주소 |
- Continental Teves AG & Co. oHG
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
2 |
초록
▼
A brake system for motor vehicles having a brake master cylinder that can be operated by a brake pedal, a fluid reservoir assigned to the brake master cylinder, a hydraulic booster stage which is operatively connected to the inlet side of the brake master cylinder, with a booster piston which is sub
A brake system for motor vehicles having a brake master cylinder that can be operated by a brake pedal, a fluid reservoir assigned to the brake master cylinder, a hydraulic booster stage which is operatively connected to the inlet side of the brake master cylinder, with a booster piston which is subjected to a hydraulic boost pressure supplied by a pressure source and which in all operating modes allows a direct mechanical action by the brake pedal on a hydraulic piston of the brake master cylinder, and having an electrically controllable pressure regulating valve arrangement for metering the boost pressure. In order to provide a brake system of simple design, which is cost-effective to produce and which functions reliably, the pressure regulating valve arrangement can be hydraulically controllable.
대표청구항
▼
1. A brake system for motor vehicles comprising: a brake master cylinder that can be operated by a brake pedal,a fluid reservoir assigned to the brake master cylinder,a hydraulic booster chamber which is operatively connected to an inlet side of the brake master cylinder, with a booster piston which
1. A brake system for motor vehicles comprising: a brake master cylinder that can be operated by a brake pedal,a fluid reservoir assigned to the brake master cylinder,a hydraulic booster chamber which is operatively connected to an inlet side of the brake master cylinder, with a booster piston which is subjected to a hydraulic boost pressure supplied by a pressure source and which in all operating modes allows a direct mechanical action by the brake pedal on a hydraulic piston of the brake master cylinder,a brake circuit operatively connected to an outlet side of the brake master cylinder, anda pressure regulating valve arrangement for metering a boost pressure, the pressure regulating valve arrangement directly hydraulically connected to the brake circuit, wherein the pressure regulating valve arrangement is electrically controllable in a first operating mode and is hydraulically controllable in a second operating mode,wherein the pressure regulating valve arrangement includes an electrically controllable pilot control stage comprising a pair of control valves and a hydraulic center tap between the pair of control valves, the center tap directly hydraulically connected with a control chamber of the pressure regulating valve arrangement, the control chamber defined between a pair of control pistons within the pressure regulating valve arrangement. 2. The brake system as claimed in claim 1, wherein the pressure regulating valve arrangement is hydraulically controlled by a pressure generated by the brake master cylinder. 3. The brake system as claimed in claim 1, wherein the pressure regulating valve arrangement is a two-stage design. 4. The brake system as claimed in claim 3, wherein the pressure regulating valve arrangement further includes a valve main stage controllable via a plurality of hydraulic connections. 5. The brake system as claimed in claim 4, wherein the pilot control stage is formed by a connection in series of an analog controllable 2/2-way directional control valve, which is closed when de-energized, and an analog controllable 2/2-way directional control valve, which is open when de-energized, wherein a hydraulic center tap between the two control valves delivers a pressure from one of the two control valves for the valve main stage. 6. The brake system as claimed in claim 1 further comprising a hydraulic connection, in which a non-return valve closing towards the fluid reservoir is positioned, provided between a working pressure connecting chamber and the fluid reservoir. 7. The brake system as claimed in claim 1 further comprising a pressure sensor for registering an inlet pressure in the brake master cylinder. 8. The brake system as claimed in claim 1 further comprising a travel sensor for registering a travel of the booster piston. 9. A brake system for motor vehicles comprising: a brake master cylinder that can be operated by a brake pedal,a fluid reservoir assigned to the brake master cylinder,a hydraulic booster chamber which is operatively connected to an inlet side of the brake master cylinder, with a booster piston which is subjected to a hydraulic boost pressure supplied by a pressure source and which in all operating modes allows a direct mechanical action by the brake pedal on a hydraulic piston of the brake master cylinder, anda pressure regulating valve arrangement for metering a boost pressure,wherein the pressure regulating valve arrangement comprises a 3/3-way directional control valve having a valve main stage and a hydraulic control stage, the valve main stage comprising a valve sleeve and a valve body axially displaceable in the valve sleeve, whilst the hydraulic control stage comprises a first control piston and a second control piston, the first control piston defining a first hydraulic control chamber, the first control piston and the second control piston defining a second hydraulic control chamber, the second control piston and the valve body defining a hydraulic reservoir connecting chamber and the valve body and the valve sleeve defining a high-pressure connecting chamber and a working pressure connecting chamber. 10. The brake system as claimed in claim 9, wherein the valve body and the second control piston are integrally formed. 11. The brake system as claimed in claim 9, wherein the valve body on its end face remote from the second control piston projects into the working pressure connecting chamber and is subjected to a pressure of the high-pressure connecting chamber. 12. The brake system as claimed in claim 9, wherein the second control chamber is hydraulically connected to a center tap of the pilot control stage. 13. The brake system as claimed in claim 9, wherein the first hydraulic control chamber is hydraulically connected to a hydraulic circuit of the brake master cylinder. 14. The brake system as claimed in claim 9, wherein the valve body, interacting with the valve sleeve, in a rest position establishes a hydraulic connection between the working pressure connecting chamber and the reservoir connecting chamber, a hydraulic passage cross section of which diminishes continuously under an application of a displacement travel of the valve body in the valve sleeve, and wherein the valve body in further displacement by a slight overlap travel separates all three connecting chambers from one another, before under yet further displacement continuously opening a hydraulic connection between the high-pressure connecting chamber and the working pressure connecting chamber. 15. The brake system as claimed in claim 9, wherein the first control piston is embodied as a stepped piston. 16. The brake system as claimed in claim 15, wherein an annular hydraulic chamber between two sealing cross sections of the stepped piston is hydraulically connected to the reservoir connecting chamber. 17. The brake system as claimed in claim 15, wherein an end face of the valve body facing the working pressure connecting chamber is larger than a face of the stepped piston defining the first control chamber. 18. The brake system as claimed in claim 9, further comprising: an electromagnetically operable 2/2-way directional control valve that is configured for shutting a connection between the brake master cylinder and the first control chamber, wherein the electromagnetically operable 2/2-way directional control valve is open when de-energized, anda non-return valve which is operatively connected in parallel to the electromagnetically operable 2/2-way directional control valve and which allows a fluid volumetric flow leaving the first control chamber irrespective of a switching position of the 2/2-way directional control valve.
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