Flow Compensation Method, Device and Equipment for Gas Injection Valve
A technology of gas injection valve and flow compensation, which is applied in the directions of fuel injection device, measuring device, oil supply device, etc., can solve the problems of inappropriate selection of pressure reducing valve, low gas volume in gas tank, and inability to increase torque, so as to reduce the Pressure stability and accuracy requirements, reducing the cost of use, and ensuring the effect of stability
Active Publication Date: 2021-05-18
WEICHAI POWER CO LTD
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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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[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0065] The flow rate of the gas injection valve of the gas engine is determined by its inlet pressure P1, which is the gas rail pressure, and its outlet pressure P2, which is the engine intake manifold pressure. When the gas injection valve works in the supersonic region, that is, when the gas flow velocity is higher than the speed of sound, ...
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The invention provides a flow compensation method, device and equipment for a gas injection valve. The method includes obtaining the current first inlet pressure value and first outlet pressure value of the gas injection valve; determining whether the gas injection valve is working in the subsonic region according to the first inlet pressure value and the first outlet pressure value; if the If the gas injection valve works in the subsonic region, the first inlet pressure value and the first The first power-on time coefficient corresponding to the outlet pressure value; according to the first power-on time coefficient, determine the first power-on time of the gas injection valve; control the gas injection valve to perform gas injection according to the first power-on time. The method realizes the stable operation of the gas injection valve in the subsonic speed region, and improves the stability of the torque output and rotational speed of the gas engine.
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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IPC IPC(8): F02M21/02F02M65/00F02D45/00
CPCF02D45/00F02M21/0257F02M65/00Y02T10/30
Inventor 张霞周飞章葛兆凤王震华
Owner WEICHAI POWER CO LTD