CN101708718A - Wire control braking system and braking method thereof - Google Patents
Wire control braking system and braking method thereof Download PDFInfo
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- CN101708718A CN101708718A CN200910250661A CN200910250661A CN101708718A CN 101708718 A CN101708718 A CN 101708718A CN 200910250661 A CN200910250661 A CN 200910250661A CN 200910250661 A CN200910250661 A CN 200910250661A CN 101708718 A CN101708718 A CN 101708718A
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Abstract
The invention discloses a wire control braking system and a braking method thereof. The wire control braking system comprises a control system and a mechanical actuating mechanism, wherein the control system comprises a main control circuit module and a motor drive module; the main control circuit module controls the rotating speed, the rotating direction and the output torque of a motor through duty ratio signals of PWM_A and PWM_B, controls whether to output the duty ratio signals through an enabling control port CON, and judges stalling and loading conditions of the motor through feedback current signals; the mechanical actuating mechanism comprises a drive motor, a speed-reducing torque-increasing structure and a screw propelling structure, and the screw propelling structure is a non-self-locking structure; and when the torque is decreased, by reducing the set PWM duty ratio and with the help of the repulsion of pressing force, the pressing force between a friction plate and a braking disc can be adjusted to the required stalling torque. Through the technique provided by the invention, the self-adjustment of a gap between the friction plate and the braking disc and the self-adaptive control of the pressing force can be achieved, and the response time for adjusting the pressing force is shortened.
Description
Technical field
The invention belongs to the automobile brake-by-wire field, particularly relate to a kind of line control brake system and braking method.
Background technology
At present, in known technology, have with the akin technologic material of the present invention: " brake-by-wire " type brake system application number is CN200580034671.9, it is mainly by signal acquisition module, the master control module, the motor-drive circuit module, the mechanical actuating mechanism module, formations such as electronic pedal, we can realize the basic structure of line control brake system by this technology, but its shortcoming is to fail to propose under the automobile actual travel situation because the loss of friction lining causes friction lining and brake disc excessive clearance and realization ABS (antiblock device), ASR (anti-sideslip system), the solution of the brake-pressure regulation of control such as ESP (electronic stabilizing control system).
Summary of the invention
The objective of the invention is to propose the solution of friction lining loss clearance self-regulating joint and brake-pressure regulation in a kind of brake-by-wire.
(1) because motor is followed the big more characteristic of the big more feedback current of load substantially in rotation process, so the size of current can demarcate determine that friction lining separate with brake disc by pre-stage test the time.Inventive point that the technical program proposes is that the current value size that the main control circuit module feeds back to by detection judges whether friction lining separates with brake disc, if separate then make the motor stall, friction lining and brake disc can dwindle the gap like this, it is interim to help next braking procedure, friction lining is eliminated idle travel rapidly, shorten the braking response time as far as possible, produce the braking thrust to brake disc, simultaneously, the innovative point of this scheme maximum is and can remains friction lining and brake disc gap in limited range according to the time of the wear pattern real-time regulated motor stall of friction lining.
(2) be brake safe controls such as the ABS, the ASR that realize brake-by-wire, EPS, it is the key that realizes above-mentioned control system that desirable brake-pressure accurately is provided in real time.Because the PWM dutycycle correspondence of setting the size of the maximum stalling torque that motor can provide, the PWM dutycycle is big more, stalling torque is big more, can control and to offer brake disc thrust size by real-time regulated PWM dutycycle size in the process that contacts and compress with brake disc at friction lining.
(3) mechanical actuating mechanism many by drive motor, deceleration increases the square structure and the screw rod push structure is formed.Be the PWM dutycycle real-time regulated stalling torque size that realizes being mentioned in (2), need design at the screw rod push structure of mechanical actuating mechanism, screw thread on the screw rod push structure can only be designed to not self-locking structure, work as moment like this by reducing greatly,, do not need the motor counter-rotating by the PWM dutycycle that reduces to set, because stalling torque reduces, the non-self-locking of screw flight only need be by the thrust repulsion, can make that thrust is adjusted to maximum stalling torque between friction lining and the brake disc.
The present invention specifically discloses a kind of line control brake system, comprise control system and mechanical actuating mechanism, it is characterized in that: control system comprises main control circuit module and motor drive module, the main control circuit module is by duty cycle signals PWM_A, PWM_B controls motor speed, turn to and the output torque size, whether control the output duty cycle signal by enabling a control mouthful CON, judge motor rotation blockage and condition of loading by the feedback current signal, mechanical actuating mechanism comprises drive motor, slow down and increase square structure and screw rod push structure, wherein the screw rod push structure is non-self-locking structure, when moment by reducing greatly, by the PWM dutycycle that reduces to set, by the thrust repulsion, can make that thrust is adjusted to required stalling torque between friction lining and the brake disc.
Further, when detecting the feedback current signal and can reflect that friction lining separates with brake disc, then decide whether output duty cycle signal of PWM_A, PWM_B by control CON signal.
Wherein the screw rod push structure is made up of screw cap sleeve and screw rod, and wherein screw flight is non-self-locking thread.
The invention also discloses and adopt said system to carry out the method for brake-by-wire method.
Finally can realize friction lining and brake disc clearance self-regulating joint, and the self adaptation of glancing impact thrust is regulated by technology provided by the invention.Overcome brake-by-wire friction lining and brake disc and can't regulate the self adaptation adjusting etc. of clearance issues and thrust because of wearing and tearing, shortened the response time that thrust is regulated.This implementation method is simple, does not need too much increase Design of Mechanical Structure, only needs by software control, and fault rate is low, safe and reliable.
Description of drawings
Fig. 1: line control brake system constructional drawing of the present invention;
Fig. 2: non-self-locking screw flight figure.
Wherein in Fig. 1:
PWM_A, PWM_B are respectively the two-way duty cycle signals of control motor;
CON is the whether control signal of output signal of control PWM_A, PWM_B;
CURRENT feeds back to the current value of main control circuit module for the motor-driven plate.
Description of reference numerals:
1, screw cap sleeve; 2, screw rod;
3, main control circuit module; 4, motor-drive circuit module.
The specific embodiment
As shown in Figure 1, in the line control brake system, main control circuit module 3 is controlled motor speed, is turned to and the output torque size by PWM_A, PWM_B duty cycle signals, control whether output duty cycle signal of PWM_A, PWM_B by enabling a control mouthful CON, judge motor rotation blockage and condition of loading by feedback current CURRENT, for example when detecting feedback current CURRENT and can reflect that friction lining separates with brake disc, then decide whether output duty cycle signal of PWM_A, PWM_B by control CON signal.
Be brake safe controls such as the ABS, the ASR that realize brake-by-wire, EPS, it is to realize the key of above-mentioned control system that desirable braking thrust accurately is provided in real time.Because the PWM dutycycle correspondence of setting the size of the maximum stalling torque that motor can provide, it is big more that the PWM dutycycle is set, stalling torque is big more, can be in the process that friction lining contacts and compresses with brake disc real-time regulated PWM dutycycle size, control and will offer brake disc thrust size.
Mechanical actuating mechanism by drive motor, deceleration increases the square structure and the screw rod push structure is formed.Wherein the screw rod push structure mainly transfers rotatablely moving of motor to the linear advancement motion, thereby offer the brake disc thrust, for realizing the above-mentioned PWM dutycycle real-time regulated stalling torque size of mentioning, need carry out particular design at the screw rod push structure of mechanical actuating mechanism, as shown in Figure 2, the screw rod push structure is made up of screw cap sleeve 1 and screw thread 2. and wherein screw thread design becomes non-self-locking structure, work as moment like this by reducing greatly, by the PWM dutycycle that reduces to set, do not need to control the motor counter-rotating, because stalling torque reduces, the non-self-locking of screw flight, only need be by the thrust repulsion, can make that thrust is adjusted to required stalling torque between friction lining and the brake disc.
Can realize friction lining and brake disc clearance self-regulating joint by technology provided by the invention, and the self adaptation of glancing impact thrust is regulated.Overcome brake-by-wire friction lining and brake disc and can't regulate the self adaptation adjusting etc. of clearance issues and thrust because of wearing and tearing, shortened the response time that thrust is regulated.This implementation method is simple, does not need too much increase Design of Mechanical Structure, only needs by software control, and fault rate is low, safe and reliable.
Claims (5)
1. line control brake system, comprise control system and mechanical actuating mechanism, it is characterized in that: control system comprises main control circuit module (3) and motor drive module (4), main control circuit module (3) is by duty cycle signals PWM_A, PWM_B controls motor speed, turn to and the output torque size, whether control the output duty cycle signal by enabling a control mouthful CON, judge motor rotation blockage and condition of loading by the feedback current signal, mechanical actuating mechanism comprises drive motor, slow down and increase square structure and screw rod push structure, wherein the screw rod push structure is non-self-locking structure, when moment by reducing greatly, by the PWM dutycycle that reduces to set, by the thrust repulsion, can make that thrust is adjusted to required stalling torque between friction lining and the brake disc.
2. line control brake system according to claim 1 is characterized in that: when detecting the feedback current signal and can reflect that friction lining separates with brake disc, then decide whether output duty cycle signal of PWM_A, PWM_B by control CON signal.
3. line control brake system according to claim 1 and 2 is characterized in that: the screw rod push structure is made up of screw cap sleeve (1) and screw rod (2), and wherein screw rod (2) screw thread is non-self-locking thread.
4. brake-by-wire method, it is characterized in that: main control circuit module (3) is controlled motor speed, is turned to and the output torque size by duty cycle signals PWM_A, PWM_B, whether control the output duty cycle signal by enabling a control mouthful CON, judge motor rotation blockage and condition of loading by the feedback current signal, screw rod push structure in the mechanical actuating mechanism is non-self-locking structure, when moment by reducing greatly, by the PWM dutycycle that reduces to set, by the thrust repulsion, make that thrust is adjusted to required stalling torque between friction lining and the brake disc.
5. brake-by-wire method according to claim 4 is characterized in that: when detecting the feedback current signal and can reflect that friction lining separates with brake disc, then decide whether output duty cycle signal of PWM_A, PWM_B by control CON signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250661 CN101708718B (en) | 2009-12-14 | 2009-12-14 | Wire control braking system and braking method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250661 CN101708718B (en) | 2009-12-14 | 2009-12-14 | Wire control braking system and braking method thereof |
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| Publication Number | Publication Date |
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| CN101708718A true CN101708718A (en) | 2010-05-19 |
| CN101708718B CN101708718B (en) | 2013-03-06 |
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| CN 200910250661 Active CN101708718B (en) | 2009-12-14 | 2009-12-14 | Wire control braking system and braking method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009647A (en) * | 2010-11-17 | 2011-04-13 | 奇瑞汽车股份有限公司 | Electronic mechanical braking device |
| CN102490705A (en) * | 2011-12-15 | 2012-06-13 | 奇瑞汽车股份有限公司 | Electronic mechanical brake system and automobile adopting same |
| CN106904160A (en) * | 2017-04-12 | 2017-06-30 | 潘泓冰 | A kind of vehicle brake fluid pressure power assisting device and its boosting method |
| CN107792042A (en) * | 2016-08-30 | 2018-03-13 | 通用汽车环球科技运作有限责任公司 | Line control brake system |
| CN107792033A (en) * | 2016-08-31 | 2018-03-13 | 通用汽车环球科技运作有限责任公司 | Brake-by-wire（BRAKE‑BY‑WIRE）System |
| CN109141942A (en) * | 2018-09-05 | 2019-01-04 | 天津英创汇智汽车技术有限公司 | Steering load simulator and steering system test method |
| CN109774694A (en) * | 2019-01-11 | 2019-05-21 | 贾立进 | A kind of electromagnetic vehicle brake apparatus and brake-by-wire technology |
| CN112444744A (en) * | 2019-08-27 | 2021-03-05 | 珠海市一微半导体有限公司 | Motor abnormity detection method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2665380Y (en) * | 2003-09-26 | 2004-12-22 | 清华大学 | Engine electronic throttle control apparatus |
| CN101582668A (en) * | 2009-05-12 | 2009-11-18 | 奇瑞汽车股份有限公司 | Method and device for preventing motor from being blocked based on brake-by-wire system of automobile |
| CN101594106B (en) * | 2009-07-10 | 2012-05-23 | 奇瑞汽车股份有限公司 | System and method for controlling motor of wire-controlled braking system |
| CN101722942A (en) * | 2009-12-08 | 2010-06-09 | 奇瑞汽车股份有限公司 | Electronic brake pedal and braking method thereof |
-
2009
- 2009-12-14 CN CN 200910250661 patent/CN101708718B/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102009647A (en) * | 2010-11-17 | 2011-04-13 | 奇瑞汽车股份有限公司 | Electronic mechanical braking device |
| CN102490705A (en) * | 2011-12-15 | 2012-06-13 | 奇瑞汽车股份有限公司 | Electronic mechanical brake system and automobile adopting same |
| CN107792042A (en) * | 2016-08-30 | 2018-03-13 | 通用汽车环球科技运作有限责任公司 | Line control brake system |
| US10507816B2 (en) | 2016-08-30 | 2019-12-17 | GM Global Technology Operations LLC | Brake-by-wire system |
| CN107792042B (en) * | 2016-08-30 | 2020-08-04 | 通用汽车环球科技运作有限责任公司 | Brake-by-wire system |
| CN107792033A (en) * | 2016-08-31 | 2018-03-13 | 通用汽车环球科技运作有限责任公司 | Brake-by-wire（BRAKE‑BY‑WIRE）System |
| CN106904160A (en) * | 2017-04-12 | 2017-06-30 | 潘泓冰 | A kind of vehicle brake fluid pressure power assisting device and its boosting method |
| CN109141942A (en) * | 2018-09-05 | 2019-01-04 | 天津英创汇智汽车技术有限公司 | Steering load simulator and steering system test method |
| CN109141942B (en) * | 2018-09-05 | 2020-12-25 | 天津英创汇智汽车技术有限公司 | Steering load simulation device and steering system test method |
| CN109774694A (en) * | 2019-01-11 | 2019-05-21 | 贾立进 | A kind of electromagnetic vehicle brake apparatus and brake-by-wire technology |
| CN112444744A (en) * | 2019-08-27 | 2021-03-05 | 珠海市一微半导体有限公司 | Motor abnormity detection method |
| CN112444744B (en) * | 2019-08-27 | 2022-03-04 | 珠海一微半导体股份有限公司 | Motor abnormity detection method |
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| Publication number | Publication date |
|---|---|
| CN101708718B (en) | 2013-03-06 |
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