Method for supporting a brake system in case of reduced effectiveness of the vehicle brake system
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G06F-007/70
G06F-019/00
G06G-007/00
G06G-007/76
출원번호
US-0663514
(2005-09-20)
등록번호
US-8762020
(2014-06-24)
우선권정보
DE-10 2004 046 378 (2004-09-24)
국제출원번호
PCT/EP2005/054687
(2005-09-20)
§371/§102 date
20110415
(20110415)
국제공개번호
WO2006/032659
(2006-03-30)
발명자
/ 주소
Ummer, Bernd
Esslinger, Holger
출원인 / 주소
Continental Teves AG & Co. OHG
인용정보
피인용 횟수 :
1인용 특허 :
3
초록▼
Disclosed is a method for increasing the braking effect in a motor vehicle having a hydraulic brake system. An energy supply unit, which is used to increase the brake pressure in at least one wheel brake, is switched on when the brake pressure adjusted by the driver in a master brake cylinder exceed
Disclosed is a method for increasing the braking effect in a motor vehicle having a hydraulic brake system. An energy supply unit, which is used to increase the brake pressure in at least one wheel brake, is switched on when the brake pressure adjusted by the driver in a master brake cylinder exceeds a first activation threshold value, which is determined depending on a detected vehicle deceleration, and the energy supply unit is switched off when the brake pressure reaches a predetermined bottom threshold value at a specific instant. According to the method, within an interval beginning at that specific instant, it is checked whether the brake pressure (pTMC) rises again using a comparison between the brake pressure and a second activation threshold (pAT,red) that is reduced compared to the first activation threshold (pAT) and/or using a comparison between a brake pressure gradient and a predetermined threshold value, and in that the energy supply unit is switched on again when a new rise of the brake pressure (pTMC) has been detected. Also disclosed is a device that is suitable for implementing the method.
대표청구항▼
1. A method for increasing a braking effect in a motor vehicle having a hydraulic brake system, wherein an on an energy supply unit, which is used to increase the brake pressure in at least one wheel brake, when a brake pressure adjusted by a driver in a master brake cylinder exceeds a first activat
1. A method for increasing a braking effect in a motor vehicle having a hydraulic brake system, wherein an on an energy supply unit, which is used to increase the brake pressure in at least one wheel brake, when a brake pressure adjusted by a driver in a master brake cylinder exceeds a first activation threshold, which is determined depending on a detected vehicle deceleration, and the energy supply unit is switched off when the brake pressure reaches a predetermined bottom threshold value at a specific instant, the method comprising: checking within an interval beginning at that specific instant whether the brake pressure (pTMC) rises using at least one of a comparison between the brake pressure and a second activation threshold (pAT,red) that is reduced compared to the first activation threshold (pAT) and using a comparison between a brake pressure gradient and a predetermined threshold value; andswitching the energy supply unit (9, 10) to on again when a new rise of the brake pressure (pTMC) has been detected. 2. A method according to claim 1, wherein the energy supply unit (9, 10) is switched on again when the brake pressure (pTMC) exceeds the second activation threshold (pAT,red). 3. A method according to claim 1, wherein the energy supply unit (9, 10) is switched on again when the brake pressure gradient exceeds the predetermined threshold value. 4. A method according to claim 1, wherein the energy supply unit (9, 10) is switched on according to the first activation threshold (pAT), when no new increase of the brake pressure is detected within the interval after a drop of the brake pressure (pTMC) below the predetermined bottom threshold value. 5. A method according to claim 1, wherein the energy supply unit (9, 10) is a pump (10) driven by a motor (9). 6. A method according to claim 1, wherein the energy supply unit (9, 10) is a component of an electronic stability control system. 7. A device for increasing a braking effect of a hydraulic brake system of a motor vehicle, having a master brake cylinder, in which a brake pressure transmittable to at least one wheel brake can be built up, a pressure sensor adapted to sense the brake pressure in the master brake cylinder, a control unit connected to the pressure sensor, and an energy supply unit that is controllable by the control unit and can be enabled when it is detected in the control unit that the brake pressure in the master brake cylinder exceeds a first activation threshold that is calculated depending on the vehicle deceleration, and which can be disabled when the brake pressure reaches a bottom threshold value at a specific instant, the device comprising: a counter in the control unit adapted to be activated at the specific instant and to be deactivated at a predetermined count of the counter, and in that with the counter operating, at least one comparison can be performed in the control unit between the brake pressure (pTMC) in the master brake cylinder (3) and a second activation threshold (pAT,red) that is reduced compared to the first activation threshold (pAT) and between a brake pressure gradient determined from the signals of the pressure sensor (14) and a predetermined threshold value, and the energy supply unit (9, 10) can be activated with the counter operating, when the at least one comparison has at least one result that the brake pressure (pTMC) exceeds the second activation threshold and the brake pressure gradient exceeds the predetermined threshold value.
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이 특허에 인용된 특허 (3)
Luckevich Mark S. ; Kingston Andrew W.,DEX, Foundation brake control algorithm for electro-hydraulic brake system and brake-by-wire system.
Pueschel Helmut,DEX ; Schmidt Guenther,DEX ; Gerdes Manfred,DEX, Method and device for controlling an ABS antilock braking / ASR traction control system.
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