Control system and control method for improving transient response of gas engine

Abstract

The invention discloses a control system and a control method for improving the transient response of a gas engine. The control system comprises the gas engine, a fuel supply system, an ignition control system and a working state monitoring and feedback system, the fuel supply system comprises a fuel storage device, a gas line, a gas track and a gas injection valve, the ignition control system comprises an ignition module and an electronic controller, and the working state monitoring and feedback system comprises an engine speed sensor, an engine water temperature sensor, a gas track pressure sensor, an airflow sensor, an exhaust temperature sensor and an exhaust oxygen sensor. The invention utilizes the fuel storage device to increase the amount of stored gas and ensure the stability of pressure in the process of supplying gas; by acquiring information such as airflow, exhaust oxygen content, exhaust temperature and engine speed, the invention regulates the change of gas injection, and consequently, not only can the transient response of the gas engine be improved, but also the operating sensitivity of the gas engine as a power device of power source can be increased.

Description

technical field [0001] The invention relates to a control system and method for improving the transient response of a gas engine, belonging to the technical field of gas engine control. Background technique [0002] Gaseous fuels include natural gas, liquefied petroleum gas, coal bed methane, biomass gas, etc. As fuel for engines, gas has the advantages of wide sources, partial regeneration, and synthesis, and has the advantages of harmful gas and low carbon emissions in terms of emissions. It is widely used in automobiles, construction machinery, drilling power and other vehicles and power equipment, which is of great significance to alleviate the energy crisis and environmental pollution. [0003] The gas injection amount control strategy currently adopted by gas fuel engines such as natural gas is to use the air flow rate as the main control parameter of the gas injection amount per cycle, that is, calculate the gas injection amount per cycle through the air flow rate col...

AI Technical Summary

Problems solved by technology

The engine measured by this gas injection control is limited by the responsiveness of the supercharger and the compressibility of the gas flow process in the intake and exhaust pipelines. When the load of the engine changes suddenly, the change of the gas injection quantity reflects the lag , causing the transient response of the engine to be lower than that of liquid fuel engines such as diesel engines, which affects the operational sensitivity of power plants equipped with gas engines

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