Gas machine control method and device

Abstract

The present invention provides a control method and device of a gas machine, comprising: obtaining the actual pressure difference of the gas machine; the actual pressure difference is the pressure difference before and after the throttle of the gas machine; according to the actual pressure difference Query the comparison table to obtain the calculation coefficient corresponding to the actual pressure difference; wherein, the comparison table is pre-configured with the corresponding relationship between the pressure difference of the gas machine and the calculation coefficient; according to the calculation coefficient, the air-fuel ratio MAP Each air-fuel ratio in the table is updated; wherein, the air-fuel ratio MAP table includes: each operating parameter of the gas engine and the air-fuel ratio corresponding to each operating parameter; the operating parameter includes a speed parameter and a power parameter; Using the updated air-fuel ratio MAP table to control the operation of the gas engine.

Description

technical field [0001] The invention relates to the field of mechanical technology, in particular to a control method and device for a gas machine. Background technique [0002] With the continuous development of science and technology, gas engines using gas as fuel are more and more widely used in various fields. As a type of engine, the gas engine also needs to be equipped with a supercharger. However, in the current market, the turbocharger selected for the gas engine usually cannot take into account the high temperature and low temperature environments; that is, if it is selected according to the high temperature environment If the supercharger is used, the supercharger will have the problem of surge in the low temperature environment. If the supercharger is selected according to the low temperature environment, the supercharging capacity of the supercharger will be insufficient in the high temperature environment. [0003] At this stage, for the temperature adaptabilit...

AI Technical Summary

Problems solved by technology

However, the treatment method of intake bypass or exhaust bypass requires not only a supercharger assembly with a bypass valve, but also a supercharger model with a very powerful supercharging capacity, which increases the cost and complexity on the one hand. On the other hand, excessive supercharger boosting capacity will also cause energy waste, thereby reducing the working efficiency of the gas machine

It can be seen that the treatment method of intake bypass or exhaust bypass cannot solve the problem of temperature adaptability of the turbocharger selected by the gas engine.

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