[특허]Brake system

Honda Motor Co., Ltd.

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Brake system

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60T-008/88
미국특허분류(USC)	303/122.13; 303/115.2
출원번호	US-0075469 (2008-03-11)
등록번호	US-8226176 (2012-07-24)
우선권정보	JP-2007-062315 (2007-03-12)
발명자 / 주소	Hatano, Kunimichi
출원인 / 주소	Honda Motor Co., Ltd.
대리인 / 주소	Carrier Blackman & Associates, P.C.
인용정보	피인용 횟수 : 12 인용 특허 : 15

초록
▼

A brake system includes a master cylinder which generates brake fluid pressure by a braking operation of a driver, an electric motor-driven slave cylinder which generates brake fluid pressure based on an electric signal responsive to a braking operation of a driver, and a wheel cylinder for braking a wheel by the brake fluid generated in the master cylinder or slave cylinder. During normal operation of the brake system, the brake fluid generated in the slave cylinder is transferred to the wheel cylinder. During abnormal operation of the brake system, the brake fluid generated in the master cylinder is transferred to the wheel cylinder. The brake system also includes an opening and closing valve in a fluid passage connecting the slave cylinder to the wheel cylinder. When a problem occurs with the slave cylinder, the opening and closing valve is closed for a predetermined amount of time.

대표
청구항
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1. A brake system comprising: a master cylinder that generates brake fluid pressure by a braking operation of a driver;an electric motor-driven slave cylinder that generates brake fluid pressure according to an electrical signal which is based on the braking operation of the driver;a wheel cylinder that brakes a wheel by the brake fluid pressure of the master cylinder or the slave cylinder;the brake fluid pressure of the slave cylinder being transmitted to the wheel cylinder when the slave cylinder normally operates, and the brake fluid pressure of the master cylinder being transmitted to the wheel cylinder when the slave cylinder does not operate normally; andan opening and closing valve that opens and closes a fluid passage which connects the slave cylinder to the wheel cylinder,wherein when a problem occurs with the slave cylinder during braking such that the slave cylinder becomes inoperable, the opening and closing valve is closed for a predetermined time, thereby maintaining the brake fluid pressure applied to the wheel cylinder for said predetermined time. 2. The brake system according to claim 1, wherein the predetermined time is a time period required for the brake fluid pressure generated by the master cylinder to rise to a predetermined value or more. 3. The brake system according to claim 1, further comprising a first fluid pressure sensor for detecting brake fluid pressure generated by the master cylinder, and a second fluid pressure sensor for detecting brake fluid pressure generated by the slave cylinder, wherein the slave cylinder generates brake fluid pressure so that the brake fluid pressure detected by the second fluid pressure sensor is adjusted to a level corresponding to the brake fluid pressure detected by the first fluid pressure sensor. 4. The brake system according to claim 2, further comprising a first fluid pressure sensor for detecting brake fluid pressure generated by the master cylinder, and a second fluid pressure sensor for detecting brake fluid pressure generated by the slave cylinder, wherein the slave cylinder generates brake fluid pressure so that the brake fluid pressure detected by the second fluid pressure sensor is adjusted to a level corresponding to the brake fluid pressure detected by the first fluid pressure sensor. 5. The brake system according to claim 1, further comprising a stroke simulator connected to the master cylinder through a reaction force permission valve, wherein the stroke simulator absorbs the brake fluid pressure generated by the master cylinder by opening the reaction force permission valve during normal operation of the salve cylinder; and the brake fluid pressure generated by the master cylinder is supplied to the wheel cylinder by closing the reaction force permission valve when the slave cylinder does not operate normally. 6. The brake system according to claim 2, further comprising a stroke simulator connected to the master cylinder through a reaction force permission valve, wherein the stroke simulator absorbs the brake fluid pressure generated by the master cylinder by opening the reaction force permission valve during normal operation of the salve cylinder; and the brake fluid pressure generated by the master cylinder is supplied to the wheel cylinder by closing the reaction force permission valve when the slave cylinder does not operate normally. 7. The brake system according to claim 1, wherein the brake system further comprises an anti-lock braking system which is arranged between the slave cylinder and a plurality of wheel cylinders and which can individually control a braking force generated by each of the wheel cylinders. 8. A brake system comprising: a controller;a master cylinder that generates brake fluid pressure by a braking operation of a driver;an electric motor-driven slave cylinder that generates brake fluid pressure according to an electrical signal which is based on the braking operation of the driver;a wheel cylinder that brakes a wheel by the brake fluid pressure of the master cylinder or the slave cylinder;the brake fluid pressure of the slave cylinder being transmitted to the wheel cylinder when the slave cylinder normally operates, and the brake fluid pressure of the master cylinder being transmitted to the wheel cylinder when the slave cylinder does not operate normally; andan opening and closing valve that opens and closes a fluid passage which connects the slave cylinder to the wheel cylinder,wherein the controller controls the opening and closing valve such that when a problem occurs with the slave cylinder during braking such that the slave cylinder becomes inoperable, the opening and closing valve is closed for a predetermined time, thereby maintaining the brake fluid pressure applied to the wheel cylinder for said predetermined time. 9. The brake system according to claim 8, wherein the predetermined time is a time period required for the brake fluid pressure generated by the master cylinder to rise to a predetermined value or more. 10. The brake system according to claim 8, further comprising a first fluid pressure sensor for detecting brake fluid pressure generated by the master cylinder, and a second fluid pressure sensor for detecting brake fluid pressure generated by the slave cylinder, wherein the controller controls the slave cylinder to generate brake fluid pressure so that the brake fluid pressure detected by the second fluid pressure sensor is adjusted to a level corresponding to the brake fluid pressure detected by the first fluid pressure sensor. 11. The brake system according to claim 9, further comprising a first fluid pressure sensor for detecting brake fluid pressure generated by the master cylinder, and a second fluid pressure sensor for detecting brake fluid pressure generated by the slave cylinder, wherein the controller controls the slave cylinder to generate brake fluid pressure so that the brake fluid pressure detected by the second fluid pressure sensor is adjusted to a level corresponding to the brake fluid pressure detected by the first fluid pressure sensor. 12. The brake system according to claim 8, further comprising a stroke simulator connected to the master cylinder through a reaction force permission valve, wherein the controller controls the stroke simulator to absorb the brake fluid pressure generated by the master cylinder by opening the reaction force permission valve during normal operation of the salve cylinder, and closes the reaction force permission valve when the slave cylinder does not operate normally so that the brake fluid pressure generated by the master cylinder is supplied to the wheel cylinder. 13. The brake system according to claim 9, further comprising a stroke simulator connected to the master cylinder through a reaction force permission valve, wherein the controller controls the stroke simulator to absorb the brake fluid pressure generated by the master cylinder by opening the reaction force permission valve during normal operation of the salve cylinder, and closes the reaction force permission valve when the slave cylinder does not operate normally so that the brake fluid pressure generated by the master cylinder is supplied to the wheel cylinder. 14. The brake system according to claim 8, wherein the brake system further comprises an anti-lock braking system which is arranged between the slave cylinder and a plurality of wheel cylinders and which can individually control a braking force generated by each of the wheel cylinders. 15. The brake system according to claim 8, wherein the controller controls the operation of the electric motor. 16. The brake system according to claim 1, wherein after said predetermined time has passed, the opening and closing valve is opened irrespective of a condition of the slave cylinder. 17. The brake system according to claim 8, wherein after said predetermined time has passed, the opening and closing valve is opened irrespective of a condition of the slave cylinder. 18. The brake system of claim 1, further comprising a first pressure sensor disposed proximate the master cylinder for sensing pressure generated by the master cylinder in response to said braking operation, a timer for controlling a duration of closure of said opening and closing valve, and a second pressure sensor for detecting brake fluid pressure generated by the slave cylinder, said second pressure sensor disposed between the slave cylinder and the opening and closing valve. 19. The brake system of claim 8, further comprising a first pressure sensor disposed proximate the master cylinder for sensing pressure generated by the master cylinder in response to said braking operation, a timer for controlling a duration of closure of said opening and closing valve, and a second pressure sensor for detecting brake fluid pressure generated by the slave cylinder, said second pressure sensor disposed between the slave cylinder and the opening and closing valve. 20. The brake system of claim 17, wherein said predetermined time is a time period required for the brake fluid pressure generated by the master cylinder to rise to a predetermined value or more.

이 특허에 인용된 특허 (15)

이 특허를 인용한 특허 피인용횟수: 12

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특허 상세정보

Brake system

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이 특허에 인용된 특허 (15)

이 특허를 인용한 특허 피인용횟수: 12

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Brake system

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이 특허에 인용된 특허 (15)

이 특허를 인용한 특허 피인용횟수: 12

IPC 상위 출원인

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IPC 상세정보(version : 201201)

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