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Wire control braking system and braking method thereof

A technology of brake-by-wire and control system, which is applied in the direction of brake transmission, brake, transportation and packaging, etc., to achieve the effect of simple and easy implementation, overcoming the problem of inability to adjust the gap, and overcoming the self-adaptive adjustment of the pressing force.

Active Publication Date: 2013-03-06
CHERY AUTOMOBILE CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a solution to the self-adjustment of friction plate loss gap and brake pressure adjustment in brake-by-wire

Method used

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  • Wire control braking system and braking method thereof
  • Wire control braking system and braking method thereof

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Embodiment Construction

[0021] Such as figure 1 As shown, in the brake-by-wire system, the main control circuit module 3 controls the motor speed, steering and output torque through the PWM_A and PWM_B duty ratio signals, and controls whether the PWM_A and PWM_B output duty ratio signals by enabling the control port CON , use the feedback current CURRENT to judge the motor stall and load conditions. For example, when the feedback current CURRENT is detected to reflect that the friction plate is separated from the brake disc, then control the CON signal to determine whether PWM_A and PWM_B output duty ratio signals.

[0022] In order to realize brake safety control of ABS, ASR, EPS, etc. of brake-by-wire, real-time and accurate provision of ideal brake pressing force is the key to realize the above-mentioned control system. Since the set PWM duty ratio corresponds to the maximum stalling torque that the motor can provide, the larger the PWM duty ratio is set, the greater the stalling torque will be. ...

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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 [0001] The invention belongs to the field of automobile brake-by-wire, in particular to a brake-by-wire system and a braking method. Background technique [0002] At present, in the known technology, technical materials similar to the present invention include: the application number of "brake-by-wire" braking system is CN200580034671.9, which mainly consists of a signal acquisition module, a main control module, a motor drive circuit module, Composed of mechanical actuator modules, electronic pedals, etc., we can realize the basic structure of the brake-by-wire system through this technology, but its shortcoming is that it fails to solve the gap between the friction plate and the brake disc due to the loss of the friction plate in the actual driving situation of the car. Solution measures to adjust the brake pressure that is too large and realize the control of ABS (anti-lock brake system), ASR (anti-skid system), ESP (electronic stability control system) an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/1755B60T13/74
Inventor 周勇
Owner CHERY AUTOMOBILE CO LTD
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