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Integrated brake-by-wire system and control method of redundant control coil

A brake-by-wire, integrated technology, applied in brake safety systems, brake control systems, brakes, etc., can solve problems such as casualties, failures, and inability to control the switch state of solenoid valves, reducing failure rates and preventing wheel locks. dead effect

Active Publication Date: 2022-03-18
WANXIANGQIANCHAO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, if the corresponding coil of the solenoid valve is disconnected, neither the main control system nor the backup control system can control the switching state of the solenoid valve, which will cause the vehicle brake to fail or the anti-lock brake function to fail, and in severe cases cause casualties

Method used

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  • Integrated brake-by-wire system and control method of redundant control coil
  • Integrated brake-by-wire system and control method of redundant control coil
  • Integrated brake-by-wire system and control method of redundant control coil

Examples

Experimental program
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Effect test

Embodiment

[0057] see Figure 1-8 , the present invention provides a technical solution: an integrated brake-by-wire system. The architecture of the integrated brake-by-wire system includes a main power supply, a main control loop, a backup power supply, a backup control loop, a master cylinder isolation valve, and a pressure chamber isolation valve. , booster valve, pressure reducing valve. The solid line in the figure represents the current circuit, and the dotted line represents the hydraulic circuit.

[0058] The main control loop receives the instructions determined by the automatic driving control system according to the specific situation, and applies current or voltage to the coils of the solenoid valves in the system according to the requirements, through the isolation valve of the master cylinder, the isolation valve of the pressure chamber, the booster valve and the pressure relief valve. Coordinated action realizes wheel braking and anti-lock braking functions during driving...

Embodiment 2

[0065] Embodiment 2 is a case of an open circuit failure of the main cylinder isolation valve coil. When the main coil winding of the master cylinder isolation valve is disconnected, the master cylinder isolation valve as a normally open valve cannot be closed by the main control circuit during the active pressurization process, causing the brake fluid to flow back to the master cylinder. invalidated. At this time, the backup control loop will apply positive voltage or current to the backup coil winding according to the judgment made by the autopilot system to take over the control of the isolation valve of the master cylinder, and control the isolation valve of the master cylinder to close to maintain the wheel cylinder pressure formed by the active pressure build-up , thereby restoring the braking ability.

[0066] In the above scenario, the processing logic of the backup control loop for the coil failure is applicable to any solenoid valve that needs to cooperate in the pr...

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Abstract

The invention discloses an integrated brake-by-wire system and a control method of redundant control coils. The system comprises a main power supply, a main control loop, a standby power supply, a standby control loop, a main cylinder isolating valve, a pressure building cavity isolating valve, a pressure increasing valve and a pressure reducing valve. In the invention, under the condition that the main coil winding or the main coil control loop is disconnected and loses response, the standby control loop controls the standby coil winding to connect the switch action of the electromagnetic valve so as to adjust the hydraulic pressure; under the condition that the main coil control loop is short-circuited, the standby control loop applies reverse current to the standby coil winding, and a reverse magnetic field formed by the standby coil winding counteracts a forward magnetic field of the main coil winding, so that the electromagnetic valve returns to the initial state; the standby control loop plays an important role in executing safe and reliable ACC and AEB functions for the automatic driving vehicle according to the processing logic of the faults, and the fault rate of automatic driving is reduced.

Description

technical field [0001] The invention relates to the technical field of brake systems, in particular to an integrated brake-by-wire brake system and a control method for redundant control coils. Background technique [0002] Autonomous driving technology has received extensive attention in recent years. Among them, L4 level autonomous driving technology has become an important technology due to its ability to completely take over vehicles in specific environments and scenarios, and as the industry chain matures, it is expected to greatly alleviate the disadvantages of high hardware costs. It has opened up the strategic high ground that various companies in the market are vying for. [0003] The automatic driving system needs to complete the acceleration, deceleration and steering of the vehicle without the intervention of the driver, which means that the driver cannot intervene in real time to take over the control right after the failure of the conventional control system. T...

Claims

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Application Information

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IPC IPC(8): B60T13/68B60T17/18
CPCB60T13/686B60T17/18B60T2270/402B60T2270/403B60T2270/404B60T2270/415
Inventor 杨春成任博邱宝象屈亮亮郑美云
Owner WANXIANGQIANCHAO CO LTD
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