Adjustable proportional valve device based on switch electromagnetic valve and brake control method

Abstract

The invention discloses an adjustable proportional valve device based on a switch electromagnetic valve and a brake control method. The adjustable proportional valve device can directly respond to the requirement of braking air pressure, a control unit is used for controlling two switch electromagnetic valves and then controlling the braking air pressure, the proportion of the braking air pressure is adjusted, control over braking power of a vehicle is achieved, and an excellent solution is provided for active control over a braking system of the vehicle. The device is simple in structure, low in cost and easy to obtain; the requirement signal of the braking air pressure can be obtained, the braking air pressure can be adjusted accurately through closed-loop control, and active precise control over braking of the vehicle is achieved; the braking function of the vehicle is not influenced, and use is safe and reliable; the device can receive a braking instruction of the vehicle, simulates the function of a brake pedal, and braking pressure of the vehicle can be controlled and adjusted automatically.

Description

technical field [0001] The invention relates to an adjustable proportional valve device and a braking control method based on a switching solenoid valve. Background technique [0002] With the continuous development of vehicle intelligent technology, the research on active control technology of vehicle braking system has been paid more and more attention. At present, there are two main types of active control schemes of vehicle braking system: the first type is through the installation of external actuators. To replace the driver's operation, so as to realize the active control of the vehicle braking system, this method has complex structure, low reliability, and high cost; the second type is to add a solenoid valve to the original braking system of the vehicle, and through the electric Control system to realize the active control of the vehicle braking system. This solution is simple, reliable and low cost. [0003] "Research on Automotive ABS Based on PWM Control of High-...

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Problems solved by technology

[0002] With the continuous development of vehicle intelligent technology, the research on active control technology of vehicle braking system has been paid more and more attention. At present, there are two main types of active control schemes of vehicle braking system: the first type is through the installation of external actuators. To replace the driver's operation, so as to realize the active control of the vehicle braking system, this method has complex structure, low reliability, and high cost; the second type is to add a solenoid valve to the original braking system of the vehicle, and through the electric control system to realize the active control of the vehicle braking system, this solution is simple, reliable and low cost

[0003] "Research on Automotive ABS Based on PWM Control of High-Speed ​​Switching Solenoid Valve" (Li Hui, Qiao Yinhu) discloses that in the control process of the automobile anti-lock braking system, the hydraulic brake anti-lock system using PWM to control the high-speed switching solenoid valve A dead brake system is used to provide system response speed and control accuracy, but this control method only uses a two-position three-way high-speed electromagnetic hydraulic valve, one-way valve and liquid reservoir for adjustment, the structure is relatively complicated, and it is impossible to realize control Accurate proportional adjustment of dynamic pressure; in addition, when performing small braking force control, a whole set of complex control process is also required

[0004] In comparison, it is more advantageous to use the second type of scheme to realize the active control of the vehicle braking system, but at present, because there is no corresponding adjustable proportional valve applied to the braking force control, it is difficult to realize the control of the braking pressure

At present, there are proportional valve adjustments through electromagnetic valve arrays, etc., but most of them have complex structures, difficult control and high cost, and it is difficult to realize marketization.

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