Control method and device for bidirectional electromagnetic force control valve for common rail flow control

Abstract

The embodiment of the invention provides a control method and device of a two-way electromagnetic force control valve for common rail flow control. The method comprises the steps that real-time commonrail oil pressure of a common rail system is obtained; common rail differential pressure is obtained according to the real-time common rail oil pressure of the common rail system and target oil pressure of the common rail system; the duty ratio of a direction signal, a driving signal and a pulse width modulation signal is calculated according to the common rail differential pressure; and the corresponding direction signal, driving signal and pulse width modulation signal are output to a bidirectional current controller according to the electrical level state of the direction signal, the electrical level state of the driving signal and the duty ratio of the pulse width modulation signal, and are used for generating a corresponding driving current in the bidirectional current controller, sothat a sliding valve core of the two-way electromagnetic force control valve is driven by the driving current to slide. The control method and device of the two-way electromagnetic force control valve for the common rail flow control can achieve fast and accurate adjustment of the common rail pressure of the high pressure common rail oil supply system.

Description

technical field [0001] Embodiments of the present invention relate to the field of power technology, and in particular to a control method and device for a bidirectional electromagnetic force control valve used for common rail flow control. Background technique [0002] In the high-pressure common rail fuel supply system, the fuel metering valve is an important link in the control of the fuel intake of the common rail pipe, and its working characteristics have a very important impact on the establishment of rail pressure. [0003] The existing fuel metering valves are all one-way electromagnetic force control valves, and the electromagnetic force can only drive the spool of the fuel metering valve to move in the direction of opening the valve port. In addition, during the return process of the spool, the electromagnetic force Hysteresis affects the closing of the fuel metering valve. Therefore, in the process of establishing the rail pressure, the two-way overshoot of the r...

AI Technical Summary

Problems solved by technology

[0003] The existing fuel metering valves are all one-way electromagnetic force control valves, and the electromagnetic force can only drive the spool of the fuel metering valve to move in the direction of opening the valve port. In addition, during the return process of the spool, the electromagnetic force Hysteresis affects the closing of the fuel metering valve

Therefore, during the establishment of the rail pressure, it often causes two-way overshoot of the rail pressure, which affects the pressure regulation effect of the high-pressure common rail oil supply system.

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