IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0921877
(2006-06-08)
|
등록번호 |
US-8271172
(2012-09-18)
|
우선권정보 |
DE-10 2005 026 740 (2005-06-09) |
국제출원번호 |
PCT/EP2006/005493
(2006-06-08)
|
§371/§102 date |
20090614
(20090614)
|
국제공개번호 |
WO2006/131368
(2006-12-14)
|
발명자
/ 주소 |
- Heller, Frank
- Knechtges, Josef
- Sopp, Thorsten
|
출원인 / 주소 |
|
대리인 / 주소 |
MacMillan, Sobanski & Todd, LLC
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
3 |
초록
▼
Hydraulic brake system for a land vehicle includes a control unit that supplies control signals for controlling automatic braking operations of the brake system, a master cylinder for generating brake pressure under the control of a driver, a first brake circuit includes a first controllable pump fo
Hydraulic brake system for a land vehicle includes a control unit that supplies control signals for controlling automatic braking operations of the brake system, a master cylinder for generating brake pressure under the control of a driver, a first brake circuit includes a first controllable pump for generating brake pressure in the first brake circuit under the control of the control unit, and a first valve arrangement having an input side, which is fluidically connected to the master cylinder, and an output side, which is fluidically connected to the first pump, wherein the first valve arrangement has an open operating state, in which the input side and the output side of the first valve arrangement are fluidically connected, and a closed operating state, in which the fluid connection between the input side and the output side of the first valve arrangement is interrupted.
대표청구항
▼
1. A hydraulic brake system for a land vehicle comprising: a control unit (ECU) that supplies control signals for controlling automatic braking operations of the brake system,a master cylinder that has an output side for generating brake pressure under control of a driver, anda first brake circuit (
1. A hydraulic brake system for a land vehicle comprising: a control unit (ECU) that supplies control signals for controlling automatic braking operations of the brake system,a master cylinder that has an output side for generating brake pressure under control of a driver, anda first brake circuit (I) including:a first controllable pump that has an output side for generating brake pressure in the first brake circuit (I) under control of the control unit (ECU), anda first valve arrangement having an input side that is fluidically connected to the output side of the master cylinder and an output side that is fluidically connected to the output side of the first pump, wherein the first valve arrangement has an open operating state, in which the input side and the output side of the first valve arrangement are fluidically connected, and a closed operating state, in which the fluid connection between the input side and the output side of the first valve arrangement is blocked,wherein the control unit (ECU) is devised such that during an automatic braking operation, it supplies first control signals for the first valve arrangement in order to bring the first valve arrangement in such a way into its open and closed operating states that a predetermined pressure is adjusted at the output side of the first valve arrangement,characterized in that the control unit (ECU) is devised to provide second high-frequency control signals for the first valve arrangement, the first control signals and the second control signals superimposing each other. 2. A hydraulic brake system according to claim 1, wherein the control unit (ECU) is devised such that in response to the automatic braking operation control, it supplies control signals for the first valve arrangement in order to bring the first valve arrangement into its closed operating state for a first predetermined time period. 3. A hydraulic brake system according to claim 1, wherein the control unit (ECU) is devised such that during the automatic braking operation, it supplies a sequence of control signals for the first valve arrangement in order to bring the first valve arrangement alternately into its open and closed operating states. 4. A hydraulic brake system according to claim 1, wherein the control device (ECU) is devised such that during the automatic braking operation, it supplies control signals for the first valve arrangement at predetermined time intervals in order to bring the first valve arrangement into its closed operating state at the predetermined time intervals for a second predetermined time period. 5. A hydraulic brake system according to claim 1, wherein the first valve arrangement adopts its open operating state in the event of a predetermined upper pressure difference between its output side and its input side. 6. A hydraulic brake system according to claim 5, wherein the control unit (ECU) is devised such that it supplies control signals for the first valve arrangement in order to bring the first valve arrangement into its open operating state in the event of the predetermined upper pressure difference. 7. A hydraulic brake system according to claim 5, wherein the first valve device automatically adopts its open operating state in the event of the predetermined upper pressure difference. 8. A hydraulic brake system according to claim 1, wherein a pulse/interpulse period ratio of a pulse width modulation are adjusted or varied in accordance with predetermined signal characteristics, wherein the predetermined signal characteristics may be continuous and may present stepped changes, and wherein individual ones of the predetermined signal characteristics are linear, sinusoidal, rectangular, triangular, or saw-tooth. 9. A hydraulic brake system according to claim 1, wherein the control unit (ECU) is devised such that in response to an actuation of the brake system by a driver that indicates an actual braking request of the driver, it supplies control signals for the first valve arrangement in order to bring the first valve arrangement into its open operating state and supplies control signals for the brake system in order to terminate the automatic braking operation. 10. A hydraulic brake system according to claim 1, wherein the control unit (ECU) is devised such that in response to an actuation of the brake system by a driver that does not indicate an actual braking request of the driver, it supplies control signals for the first valve arrangement in order to bring the first valve arrangement in such a way into its open and closed operating states that a pressure change at the output side of the first valve arrangement because of brake pressures generated by the actuation of the brake system by the driver is prevented. 11. A hydraulic brake system according to claim 1, wherein the control unit (ECU) is devised such that during the automatic braking operation, it supplies control signals for the first pump in order to operate the first pump in dependence upon an actual pressure at the output side of the first valve arrangement. 12. A hydraulic brake system according to claim 1, having at least one pressure sensor which is capable of supplying pressure signals indicating an actual pressure at the output side of the first valve arrangement, and in which the control unit (ECU) is devised such that during the automatic braking operation, it supplies control signals for the first valve arrangement in order to bring the first valve arrangement into its open and closed operating states in dependence upon the pressure signals. 13. A hydraulic brake system according to claim 12, wherein the at least one pressure sensor is devised for pressure acquisition at the output side of the first pump. 14. A hydraulic brake system according to claim 12, wherein the at least one pressure sensor is devised for pressure acquisition at an input side or in a wheel brake of the brake system. 15. A hydraulic brake system according to claim 1 further including a second brake circuit (II) having a second controllable pump that has an output side for generating brake pressure in the second brake circuit (II) under the control of the control unit (ECU), and a second valve arrangement having an input side that is fluidically connected to the output side of the master cylinder, and an output side that is fluidically connected to the output side of the second pump, wherein the second valve arrangement has an open operating state, in which the input side and the output side of the second valve arrangement are fluidically connected, and a closed operating state, in which the fluid connection between the input side and the output side of the second valve arrangement is blocked, in which the control unit (ECU) is devised such that during the automatic braking operation, it supplies control signals for the first valve arrangement and the second valve arrangement in order to bring the first valve arrangement and the second valve arrangement in each case in such a way into their open and closed operating states that the predetermined pressure is adjusted at the output side of the first valve arrangement and at the output side of the second valve arrangement. 16. A method of controlling a hydraulic brake system for a land vehicle that includes a master cylinder that has an output side for generating brake pressure under the control of a driver, a first brake circuit (I) that includes a first controllable pump that has an output side for generating brake pressure in the first brake circuit (I) under the control of the control unit (ECU), and a first valve arrangement having an input side that is fluidically connected to the output side of the master cylinder and an output side that is fluidically connected to the output side of the first pump, wherein a fluid connection between the input side and the output side of the first valve arrangement may be established and blocked in a controlled manner, the method comprising the steps of: controlling the first valve arrangement during an automatic braking operation by means of signals in order to establish and block the fluid connection between the input side and the output side of the first valve arrangement in such a way that a predetermined pressure is adjusted at the output side of the first valve arrangement characterized by controlling the first valve arrangement during an automatic braking operation by means of first and second signals at high frequency, the first and the second signals superimposing each other. 17. A method according to claim 16, wherein in response to the automatic braking operation, the fluid connection between the input side and the output side of the first valve arrangement is established for a first predetermined time period. 18. A method according to claim 16, wherein during the automatic braking operation, the fluid connection between the input side and the output side of the first valve arrangement is alternately established and blocked. 19. A method according to claim 16, wherein during the automatic braking operation, the fluid connection between the input side and the output side of the first valve arrangement is blocked at predetermined time intervals for a second predetermined time period. 20. A method according to claim 16, wherein the fluid connection between the input side and the output side of the first valve arrangement is established in the event of a predetermined upper pressure difference between the output side and the input side of the first valve arrangement. 21. A method according to claim 16, wherein in response to an actuation of the brake system by a driver that indicates an actual braking request of the driver, the fluid connection between the input side and the output side of the first valve arrangement is established and the automatic braking operation is terminated. 22. A method according to claim 16, wherein in response to an actuation of the brake system by a driver that does not indicate an actual braking request of the driver, the fluid connection between the input side and the output side of the first valve arrangement is established and blocked in such a way that a pressure change at the output side of the first valve arrangement as a result of brake pressures generated by the actuation of the brake system by the driver is prevented. 23. A method according to claim 16, wherein at least an actual pressure for the output side of the first valve arrangement is determined, and the fluid connection between the input side and the output side of the first valve arrangement is established and blocked in dependence upon the at least one actual pressure. 24. A method according to claim 23, wherein the at least one actual pressure is determined at the output side of the first pump. 25. A method according to claim 23, wherein the at least one actual pressure is determined at an input side or in a wheel brake of the brake system. 26. A method according to claim 16, wherein the brake system includes a second brake circuit (II) having a second controllable pump that has an output side for generating brake pressure in the second brake circuit (II) under the control of the control unit (ECU), and a second valve arrangement having an input side that is fluidically connected to the output side of the master cylinder and an output side that is fluidically connected to the output side of the second pump, wherein a fluid connection between the input side and the output side of the second valve arrangement may be established and blocked in a controlled manner, and including the step of: controlling the first valve arrangement and the second valve arrangement during an automatic braking operation in order to establish and block the fluid connection between the input side and the output side of the first valve arrangement and the fluid connection between the input side and the output side of the second valve arrangement in such a way that the predetermined pressure is adjusted at the output side of the first valve arrangement and at the output side of the second valve arrangement.
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