[특허]Hydraulic brake system and method as well as control device for its operation

ROBERT BOSCH GMBH

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Hydraulic brake system and method as well as control device for its operation

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60T-008/42 B60T-013/12 B60T-008/40 B60T-013/74
출원번호	US-0580517 (2011-01-25)
등록번호	US-9409558 (2016-08-09)
우선권정보	DE-10 2010 002 406 (2010-02-26)
국제출원번호	PCT/EP2011/050973 (2011-01-25)
§371/§102 date	20130205 (20130205)
국제공개번호	WO2011/104056 (2011-09-01)
발명자 / 주소	Pfeiffer, Wolfgang Nagel, Willi Harter, Werner Bolz, Martin-Peter Bauer, Urs
출원인 / 주소	ROBERT BOSCH GMBH
대리인 / 주소	Norton Rose Fulbright US LLP
인용정보	피인용 횟수 : 0 인용 특허 : 13

초록
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A hydraulic brake system has: a force-pressure conversion element, which is in hydraulic connection with at least one wheel brake cylinder of at least one wheel; a volume-adaptation element in hydraulic connection with the at least one wheel brake and the force-pressure conversion element; and as an actuating unit for actuating the force-pressure conversion element, which actuating unit has an input element. The pressure in the at least one wheel brake cylinder is adjusted by operating the volume-adaptation unit and/or the actuating unit. For this purpos...

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1. A hydraulic brake system for a vehicle having multiple wheel brake cylinders corresponding to multiple wheels, comprising: a brake master cylinder in hydraulic connection with at least one wheel brake cylinder of the multiple wheel brake cylinders of at least one wheel of the multiple wheels;a plunger in hydraulic connection with the at least one wheel brake cylinder and the brake master cylinder; anda brake force booster for actuating the brake master cylinder, wherein the brake force booster has an input element, wherein, during a pressure adjustment in the at least one wheel brake cylinder by an operation of the plunger, an actuating position of the input element is maintained by an operation of the brake force booster and a non-varying force applied by a driver and capable of causing a displacement of the input element, wherein the hydraulic connection among the at least one wheel brake cylinder, the plunger and the brake master cylinder is continuously maintained during the pressure adjustment at the at least one wheel brake cylinder;wherein the pressure adjustment in the at least one wheel brake cylinder takes place by operating the plunger and the brake force booster when at least one hydraulic connection has been established among the at least one wheel brake cylinder, the plunger and the brake master cylinder, and wherein during the pressure adjustment in the at least one wheel brake cylinder, the hydraulic connection between the remaining wheel brake cylinders of the multiple wheel brake cylinders located between the at least one wheel brake cylinder, the plunger and the brake master cylinder is interrupted. 2. The hydraulic brake system as recited in claim 1, wherein the retention of the actuating state of the input element corresponding to a retention of the force to be applied in order to keep the input element at a particular position, and wherein the brake force booster is controlled in such a way that (i) the non-varying force to be applied by the driver in order to keep the input element at a particular position is independent of the pressure prevailing in the brake system, and (ii) an actuating position of the brake force booster is maintained. 3. The hydraulic brake system as recited in claim 1, wherein the establishment of the at least one hydraulic connection among the at least one wheel brake cylinder, the plunger and the brake master cylinder takes place by at least one interruption element of a first type and at least one interruption element of a second type. 4. The hydraulic brake system as recited in claim 3, wherein the at least one wheel brake cylinder is hydraulically connected to the brake master cylinder via precisely one interruption element of the second type. 5. The hydraulic brake system as recited in claim 3, wherein the interruption element of the first type is one of (i) a switching valve which is closed in the deenergized state, or (ii) a control valve which is closed in the deenergized state. 6. The hydraulic brake system as recited in claim 3, wherein the interruption element of the second type is one of (i) a switching valve which is open in the deenergized state, or (ii) a control valve which is open in the deenergized state. 7. The hydraulic brake system as recited in claim 1, wherein the pressure adjustment in the at least one wheel brake cylinder takes place by operating the plunger via at least one of (i) a direct hydraulic connection of the plunger to the at least one wheel brake cylinder and (ii) an indirect hydraulic connection via the brake master cylinder. 8. The hydraulic brake system as recited in claim 1, wherein the non-varying force is applied by the driver to a pedal, wherein the pedal and the input element are distinct. 9. A method for operating a hydraulic brake system for a vehicle having multiple wheel brake cylinders corresponding to multiple wheels, comprising: providing a brake master cylinder in hydraulic connection with at least one wheel brake cylinder of the multiple wheel brake cylinders of at least one wheel of the multiple wheels;providing a plunger in hydraulic connection with the at least one wheel brake and the brake master cylinder; andactuating the brake master cylinder using a brake force booster having an input element, wherein in a first operating mode, during a pressure adjustment in the at least one wheel brake cylinder by an operation of the plunger, an actuating position of the input element is maintained by an operation of the brake force booster and a non-varying force applied by a driver and capable of causing a displacement of the input element, wherein the hydraulic connection among the at least one wheel brake cylinder, the plunger and the brake master cylinder is continuously maintained during the pressure adjustment at the at least one wheel brake cylinder;wherein the pressure adjustment in the at least one wheel brake cylinder takes place by operating the plunger and the brake force booster when at least one hydraulic connection has been established among the at least one wheel brake cylinder, the plunger and the brake master cylinder, and wherein during the pressure adjustment in the at least one wheel brake cylinder, the hydraulic connection between the remaining wheel brake cylinders of the multiple wheel brake cylinders located between the at least one wheel brake cylinder, the plunger and the brake master cylinder is interrupted. 10. The method as recited in claim 9, wherein the pressure in the at least one wheel brake cylinder is adjusted in temporal sequence with at least one of the other wheel brake cylinders. 11. The method as recited in claim 9, wherein in a second operating mode, the pressure is adjusted solely by actuating the brake force booster. 12. The method as recited in claim 9, wherein the pressure adjustment at the at least one wheel brake cylinder takes place during an active pressure buildup and is independent of the driver. 13. The method as recited in claim 12, wherein in an active pressure buildup, the brake force booster is operated in such a way that an exchange of brake medium between the brake master cylinder and a brake medium reservoir assigned to the brake master cylinder is prevented. 14. The method as recited in claim 9, wherein the pressure adjustment at the at least one wheel brake cylinder takes place during a pressure modulation in order to prevent locking of the at least one wheel assigned to the at least one wheel brake cylinder. 15. The method as recited in claim 9, wherein the hydraulic brake system is part of an overall brake system having an additional regenerative brake system in addition to the hydraulic brake system, and wherein the pressure adjustment at the at least one wheel brake cylinder takes place within the framework of an adaptation of a hydraulic braking effect to a braking effect of the regenerative brake torque. 16. The method as recited in claim 15, wherein an overall braking effect, which includes the hydraulic braking effect and the regenerative braking effect, is kept constant by adapting the hydraulic braking effect. 17. The method as recited in claim 9, wherein the non-varying force is applied by the driver to a pedal, wherein the pedal and the input element are distinct. 18. A control device for controlling operation of a hydraulic brake system for a vehicle having multiple wheel brake cylinders corresponding to multiple wheels, wherein the control device is configured to: provide a brake master cylinder in hydraulic connection with at least one wheel brake cylinder of the multiple wheel brake cylinders of at least one wheel of the multiple wheels;provide a plunger in hydraulic connection with the at least one wheel brake and the brake master cylinder; andactuate the brake master cylinder using a brake force booster having an input element, wherein in a first operating mode, during a pressure adjustment in the at least one wheel brake cylinder by an operation of the plunger, an actuating position of the input element is maintained by an operation of the brake force booster and a non-varying force applied by a driver and capable of causing a displacement of the input element, wherein the hydraulic connection among the at least one wheel brake cylinder, the plunger and the brake master cylinder is continuously maintained during the pressure adjustment at the at least one wheel brake cylinder;wherein the pressure adjustment in the at least one wheel brake cylinder takes place by operating the plunger and the brake force booster when at least one hydraulic connection has been established among the at least one wheel brake cylinder, the plunger and the brake master cylinder, and wherein during the pressure adjustment in the at least one wheel brake cylinder, the hydraulic connection between the remaining wheel brake cylinders of the multiple wheel brake cylinders located between the at least one wheel brake cylinder, the plunger and the brake master cylinder is interrupted. 19. The control device as recited in claim 18, wherein the control unit is configured to implement the control of the operation of the hydraulic brake system by: (i) considering as input variables at least one of a signal of a travel sensor, a signal of a pressure sensor, a signal with regard to a request for a pressure adaptation, a signal with regard to a request for an active pressure buildup, a signal with regard to an existing driving situation, a signal with regard to an operating state of a regenerative brake system; and(ii) outputting a control variable for at least one of a control of a motor of the brake force booster, a control of at least one valve, and a control of a motor of the plunger.

이 특허에 인용된 특허 (13)

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Hydraulic brake system and method as well as control device for its operation

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Hydraulic brake system and method as well as control device for its operation

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