Double-nozzle gas/liquid dual-fuel in-cylinder direct injection internal combustion engine and control method

Abstract

The invention provides a double-nozzle gas / liquid dual-fuel in-cylinder direct injection internal combustion engine and a control method, and belongs to the field of internal combustion engine control. According to the system, on the basis of still using an ignition type internal combustion engine body, a double-nozzle gas / liquid dual-fuel ignition type internal combustion engine in-cylinder direct injection device and a fuel injection and ignition electronic control unit are additionally arranged, and the double-nozzle gas / liquid dual-fuel ignition type internal combustion engine in-cylinder direct injection device comprises a gas fuel flow sensor, a gas fuel control valve, a gas fuel pressure stabilizer, a liquid fuel flow sensor, a liquid fuel control valve and the like. The fuel injection and ignition electronic control unit adjusts injection time and injection pulse width of a gas fuel nozzle and a liquid fuel nozzle, and therefore in-cylinder injection of gas / liquid dual fuels in any ratio is achieved; the injection mass ratio of the gas / liquid dual fuels is adjusted in real time according to working conditions, and therefore the starting speed and accelerating response speed of the internal combustion engine are increased, and fuel consumption and pollutant emission are reduced; and the heat dissipation and lubrication problems caused by long-time use of the internal combustion engine are relieved by decreasing the using frequency of the gas-fuel high pressure nozzle.

Description

technical field [0001] In-cylinder direct injection is one of the effective methods to realize energy saving and clean combustion of spark-ignition internal combustion engines. The ignition type internal combustion engine has its own advantages and disadvantages in direct injection of gaseous fuel or liquid fuel in the cylinder. The present invention provides a dual-nozzle gas / liquid dual fuel in-cylinder direct injection internal combustion engine and its control method, which combines the advantages of gas and liquid fuels. , specifically related to the control of dual-nozzle air / liquid dual-fuel in-cylinder direct-injection internal combustion engines. Background technique [0002] In-cylinder direct injection technology is one of the effective methods to realize energy-saving and clean combustion of spark-ignition internal combustion engines. After adopting fuel in-cylinder direct injection technology, its gas charging efficiency is significantly improved, and the knocki...

AI Technical Summary

Problems solved by technology

[0005] In the face of increasingly stringent regulations on fuel consumption and pollutant emission restrictions, in view of the high particulate matter emissions of traditional single-fuel in-cylinder direct injection internal combustion engines and the lubrication and cooling problems faced by high-pressure gas nozzles working for a long time, combined with gas fuel and liquid fuel. Based on the respective advantages of in-cylinder direct injection technology, the present invention provides a dual-nozzle gas / liquid dual-fuel in-cylinder direct-injection internal combustion engine and its control method

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