Brake system for a vehicle and method for operating a brake system for a vehicle
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60T-013/74
B60T-013/58
B60T-007/04
B60T-008/40
B60T-013/66
B60T-007/06
출원번호
US-0812034
(2011-05-30)
등록번호
US-9061673
(2015-06-23)
우선권정보
DE-10 2010 038 555 (2010-07-28)
국제출원번호
PCT/EP2011/058830
(2011-05-30)
§371/§102 date
20130403
(20130403)
국제공개번호
WO2012/013391
(2012-02-02)
발명자
/ 주소
Weiberle, Reinhard
Jahnz, Timo
출원인 / 주소
ROBERT BOSCH GMBH
대리인 / 주소
Kenyon & Kenyon LLP
인용정보
피인용 횟수 :
8인용 특허 :
10
초록▼
A brake system includes: a brake actuating element; a first piston-cylinder unit having a first piston displaceable by the brake actuating element actuated by at least a predefined minimum actuation such that a first internal pressure in the first piston-cylinder unit is increased; at least one whee
A brake system includes: a brake actuating element; a first piston-cylinder unit having a first piston displaceable by the brake actuating element actuated by at least a predefined minimum actuation such that a first internal pressure in the first piston-cylinder unit is increased; at least one wheel brake cylinder having a brake pressure which is increased using the increased first internal pressure; a first brake booster; and a second piston-cylinder unit having a second piston displaceable by the first brake booster so that a second internal pressure in the second piston-cylinder unit is increased, and to which the at least one wheel brake cylinder is hydraulically connected such that the brake pressure of the at least one wheel brake cylinder is increased by the increased second internal pressure.
대표청구항▼
1. A brake system for a vehicle, comprising: a brake actuating element;a first piston-cylinder unit, wherein the brake actuating element is disposed at the first piston-cylinder unit in such a way that a first piston of the first piston-cylinder unit is displaced by actuation of the brake actuating
1. A brake system for a vehicle, comprising: a brake actuating element;a first piston-cylinder unit, wherein the brake actuating element is disposed at the first piston-cylinder unit in such a way that a first piston of the first piston-cylinder unit is displaced by actuation of the brake actuating element by at least a predefined minimum actuation so that a first internal pressure in the first piston-cylinder unit is increased;at least one wheel brake cylinder hydraulically connected to the first piston-cylinder unit in such a way that a brake pressure of the at least one wheel brake cylinder is increased using the increased first internal pressure in the first piston-cylinder unit;a first brake booster;a second piston-cylinder unit, wherein the first brake booster is disposed at the second piston-cylinder unit in such a way that a second piston of the second piston-cylinder unit is displaced by the first brake booster so that a second internal pressure in the second piston-cylinder unit is increased, and wherein the at least one wheel brake cylinder is hydraulically connected to the second piston-cylinder unit in such a way that the brake pressure of the at least one wheel brake cylinder is increased using the increased second internal pressure in the second piston-cylinder unit; andan evaluation-and-control device that specifies a target force of the first brake booster applied to the second piston of the second piston-cylinder unit, wherein the target force does not influence a brake pressure increase produced by the first piston-cylinder unit. 2. The brake system as recited in claim 1, further comprising: at least one isolating valve controllable into a closed state, wherein a displacement of brake medium at least one of (i) from the first piston-cylinder unit into the second piston-cylinder unit, and (ii) from the second piston-cylinder unit into the first piston-cylinder unit, is prevented by the at least one isolating valve controlled into the closed state. 3. The brake system as recited in claim 2, wherein at least in one operating mode of the brake system, a driver braking force exerted on the brake actuating element is transmitted to the first piston via the brake actuating element displaced by at least a predefined minimum actuation travel not equal to zero as the minimum actuation, and a force transmission to the first piston from the brake actuating element displaced by less than the predefined minimum actuation travel is prevented. 4. The brake system as recited in claim 3, wherein the target force is specified taking into account information relating to at least one additional braking torque exerted on at least one wheel of the vehicle in addition to the at least one hydraulic braking torque of the at least one wheel brake cylinder, and wherein the evaluation-and-control device activates the first brake booster to apply the specified target force. 5. The brake system as recited in claim 4, wherein the at least one additional braking torque includes at least one generator braking torque. 6. The brake system as recited in claim 4, wherein the evaluation-and-control device activates the first brake booster such that a volume of brake medium corresponding to an increase over time of the at least one additional braking torque is drawn into the second piston-cylinder unit by the displaced second piston. 7. The brake system as recited in claim 4, further comprising: at least one brake actuating element sensor, wherein a target braking quantity corresponding to the actuation of the brake actuating element is specified with the use of the at least one brake actuating element sensor, and wherein the target force to be applied to the second piston of the second piston-cylinder unit is specified with the use of the evaluation-and-control device, taking the target braking quantity additionally into account. 8. The brake system as recited in claim 3, further comprising: a first contact part connected to the brake actuating element and disposed in relation to a second contact part of the first piston in such a way that (i) the first contact part connected to the brake actuating element displaced by less than the predefined minimum actuation travel is spaced from the second contact part, and (ii) the first contact part connected to the brake actuating element displaced by at least the predefined minimum actuation travel contacts the second contact part. 9. The brake system as recited in claim 3, wherein the brake actuating element is connected to the first piston of the first piston-cylinder unit via a spring device. 10. The brake system as recited in claim 3, further comprising: a second brake booster, wherein the second brake booster exerts at least one of (i) a simulation force opposing the actuation of the brake actuating element on the brake actuating element, and (ii) an assistance force corresponding to the actuation of the brake actuating element on the first piston of the first piston-cylinder unit. 11. A method for operating a brake system for a vehicle having a brake actuating element, a first brake booster, a first piston-cylinder unit hydraulically connected to at least one wheel brake cylinder, and a second piston-cylinder unit hydraulically connected to the at least one wheel brake cylinder, the method comprising: displacing a first piston of the first piston-cylinder unit by the brake actuating element actuated by at least a predefined minimum actuation such that a first internal pressure in the first piston-cylinder unit and a brake pressure of the at least one wheel brake cylinder are increased;specifying, by an evaluation-and-control device, a target force of the first brake booster applied to a second piston of the second piston-cylinder unit, wherein the target force does not influence a brake pressure increase produced by the first piston-cylinder unit; andincreasing the brake pressure of the at least one wheel brake cylinder by displacing the second piston of the second piston-cylinder unit hydraulically connected to the at least one wheel brake cylinder, with the use of the first brake booster. 12. The method as recited in claim 11, further comprising: ascertaining information relating to at least one additional braking torque which is exerted on at least one wheel of the vehicle in addition to the at least one hydraulic braking torque of the at least one wheel brake cylinder;specifying the target force of the first brake booster to be applied to the second piston of the second piston-cylinder unit, taking into account the ascertained information relating to the at least one additional braking torque; andactivating the first brake booster such that the specified target force of the first brake booster is applied to the second piston of the second piston-cylinder unit. 13. The method as recited in claim 12, further comprising: specifying a target braking quantity relating to a target deceleration of the vehicle taking account of the actuation of the brake actuating element by a driver;wherein the target force of the first brake booster is applied to the second piston of the second piston-cylinder unit, taking the specified target braking quantity additionally into account. 14. The method as recited in claim 13, wherein the target quantity is specified taking into account a difference between the target deceleration of the vehicle, corresponding to the specified target braking quantity, and the at least one additional braking torque. 15. The method as recited in claim 12, wherein the first brake booster is activated to apply the specified target force such that by displacement of the second piston a volume of brake medium corresponding to an increase over time of the at least one additional braking torque is drawn into the second piston-cylinder unit. 16. A brake system for a vehicle, comprising: a brake actuating element;a first piston-cylinder unit, wherein the brake actuating element is disposed at the first piston-cylinder unit in such a way that a first piston of the first piston-cylinder unit is displaced by actuation of the brake actuating element by at least a predefined minimum actuation so that a first internal pressure in the first piston-cylinder unit is increased;at least one wheel brake cylinder hydraulically connected to the first piston-cylinder unit in such a way that a brake pressure of the at least one wheel brake cylinder is increased using the increased first internal pressure in the first piston-cylinder unit;a first brake booster;a second piston-cylinder unit, wherein the first brake booster is disposed at the second piston-cylinder unit in such a way that a second piston of the second piston-cylinder unit is displaced by the first brake booster so that a second internal pressure in the second piston-cylinder unit is increased, and wherein the at least one wheel brake cylinder is hydraulically connected to the second piston-cylinder unit in such a way that the brake pressure of the at least one wheel brake cylinder is increased using the increased second internal pressure in the second piston-cylinder unit; andan isolating valve controllable into a closed state, wherein: the isolating valve hydraulically connects the first piston-cylinder unit to the second piston-cylinder unit such that a displacement of brake medium at least one of (i) from the first piston-cylinder unit into the second piston-cylinder unit, and (ii) from the second piston-cylinder unit into the first piston-cylinder unit, is prevented when the isolating valve is in the closed state; andopening and closing of the isolating valve switches between (i) a first operating mode in which a hydraulic braking torque of the at least one wheel brake cylinder is produced exclusively by a driver braking force exerted on the brake actuating element, and (ii) a second operating mode in which, in addition to the driver braking force, the hydraulic braking torque of the at least one wheel brake cylinder is increased through displacement of the second piston of the second piston-cylinder unit.
Gautier Jean-Pierre (Aulnay Sous Bois FRX), Brake system with dual vacuum boosters having interconnected chambers and dual master cylinders having interconnected hy.
Steinhauser Walter (Schwieberdingen DEX) Kaes Guenter (Stuttgart DEX) Maisch Wolfgang (Schwieberdingen SC DEX) Stegmaier Alwin (North Charleston SC), Pressure generator for a hydraulic brake system for a vehicle.
Mahnkopf, Dirk; Schlichenmaier, Andreas; Seitz, Stefan; Bussmann, Otmar; Foitzik, Bertram; Eichhorn, Thomas, Electromechanical braking device for a braking system and braking system for a vehicle.
Sala, Paolo; Arrigoni, Riccardo; Szewczyk, Beniamin, Simulation device for an electronically controlled braking apparatus (BBW), and method of applying a contrast action.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.