Flow compensation method, device and equipment for gas injection valve

Abstract

The invention provides a flow compensation method, device and equipment for a gas injection valve. The method comprises the steps that a current first inlet pressure value and a current first outlet pressure value of the gas injection valve are obtained; according to the first inlet pressure value and the first outlet pressure value, whether the gas injection valve works in a subsonic speed area or not is determined; if the gas injection valve works in the subsonic region, a first power-on time coefficient corresponding to the first inlet pressure value and the first outlet pressure value is determined according to a corresponding relation among the inlet pressure value, the outlet pressure value and the power-on time coefficient when the gas injection valve works in the subsonic region; the first power-on time of the gas injection valve is determined according to the first power-on time coefficient; and the gas injection valve is controlled to inject fuel gas according to the first power-on time. According to the method, stable work of the gas injection valve in the subsonic speed area is achieved, and the stability of the torque output and the rotating speed of the gas engine isimproved.

Description

technical field [0001] The invention relates to gas engine technology, in particular to a flow compensation method, device and equipment for a gas injection valve. Background technique [0002] The gas injection valve is a device that controls fuel injection in a gas engine, and the flow rate of the gas injection valve determines the speed and torque output of the engine. [0003] In practical applications, due to various reasons such as low gas volume of the gas tank, inappropriate selection of the pressure reducing valve, poor pressure stabilization accuracy, or too small or too long pipe diameter in the layout of the gas pipeline, etc., Under such circumstances, the inlet pressure of the gas injection valve, that is, the gas rail pressure fluctuates greatly, making the gas injection valve work in the subsonic region. [0004] When the gas injection valve works in the subsonic region, that is, when the gas flow rate is lower than the speed of sound, the flow rate of the g...

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Problems solved by technology

[0003] In practical applications, due to various reasons such as low gas volume of the gas tank, inappropriate selection of the pressure reducing valve, poor pressure stabilization accuracy, or too small or too long pipe diameter in the layout of the gas pipeline, etc., Under normal circumstances, the inlet pressure of the gas injection valve, that is, the gas rail pressure fluctuates greatly, making the gas injection valve work in the subsonic region

[0004] When the gas injection valve works in the subsonic region, that is, when the gas flow rate is lower than the speed of sound, the flow rate of the gas injection valve drops severely, resulting in the inability to inject enough fuel during the power-on time of the gas injection valve, resulting in unstable control of the engine speed and torque. unable to improve

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