Control method and control device of electromagnetic valve and vehicle

Abstract

The embodiment of the invention discloses a control method and a control device of an electromagnetic valve and a vehicle. The control method of the electromagnetic valve comprises the following steps: generating a pulse width modulation signal, wherein the frequency of the pulse width modulation signal is greater than the response frequency of the electromagnetic valve and the duty ratio of the pulse width modulation signal fluctuates periodically within a preset range so that the pulse width modulation signal is superposed with a flutter signal; and transmitting the pulse width modulation signal to the electromagnetic valve. The amplitude and the frequency of the flutter signal are respectively determined by modulating the periodic fluctuation of the duty ratio of the PWM signal in the preset range and the fluctuation range and the fluctuation period of the duty ratio of the PWM signal so that the independent adjustment of the amplitude and the frequency of the flutter signal is realized. The algorithm of the flutter signal is simplified on the basis of solving the problem of hysteresis of the electromagnetic valve due to static friction of the system or parasitic flutter of theelectromagnetic valve, and the amplitude and the frequency of the flutter signal can be better controlled according to the requirement of the hysteresis effect and thus the dynamic response characteristic of the electromagnetic valve can be better improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of solenoid valve driving, and in particular to a control method, a control device and a vehicle of a solenoid valve. Background technique [0002] In the hydraulic system, the solenoid valve is used to realize the on-off of the liquid circuit or the change of the liquid flow direction. The solenoid valve generally has a spool that can slide under the electromagnetic force of its solenoid coil, and the solenoid valve is controlled by the sliding spool. on and off. Because the magnet material has hysteresis characteristics, and the valve core has to overcome a certain static friction force in the solenoid valve system during the process of sliding from rest, the solenoid valve has a viscous effect and hysteresis, which reduces the dynamic response performance of the solenoid valve. [0003] In the prior art, the hysteresis effect of the solenoid valve can be improved by using a pulse wi...

AI Technical Summary

Problems solved by technology

The amplitude and frequency of the parasitic current are determined by the amplitude, frequency and duty cycle of the PWM signal. When the main current of the solenoid valve needs to be changed to control the open state of the solenoid valve, the parasitic current will also change with the PWM signal. and change, so that the amplitude and frequency of the parasitic current cannot be adjusted independently, so the amplitude and frequency of the parasitic current cannot be controlled according to the hysteresis effect of the solenoid valve

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