Single-nozzle internal combustion engine gas-liquid two-phase fuel injection system and method

Abstract

The invention relates to a single-nozzle internal combustion engine gas-liquid two-phase fuel injection system and method, and belongs to the field of injection and two-phase fuel compound injection of internal combustion engine gas and liquid fuel in cylinders. The system is additionally provided with a gas-liquid two-phase fuel compound injection system and an electronic control unit on the basis of remaining the whole body of an original engine. The gas-liquid two-phase fuel compound injection system mainly comprises a gas fuel one-way valve, a gas fuel flow and pressure sensor, a gas fuel linear electromagnetic valve, a liquid fuel one-way valve, a liquid fuel flow and pressure sensor, a liquid fuel linear electromagnetic valve, a nozzle, a liquid fuel pump, a three-way joint and the like. The electronic control unit regulates the gas fuel linear electromagnetic valve and the liquid fuel linear electromagnetic valve so that gas fuel and liquid fuel can be injected into an air cylinder according to any mass ratio, accordingly the space needed for independently installing the gas-liquid fuel injection system is substantially reduced, and the heat dissipation and lubrication problems of the nozzle during high-pressure injection of gas fuel are solved due to injection of the liquid fuel and the gas fuel.

Description

technical field [0001] In-cylinder direct injection is an effective method to improve the response characteristics and performance of internal combustion engines. The fuel for in-cylinder direct injection can include gas and liquid fuels. The present invention provides a single-nozzle internal combustion engine gas-liquid two-phase fuel injection system and method, specifically The content involves the injection of gaseous and liquid fuels in the cylinder and the composite injection of two-phase fuels. Background technique [0002] Compared with the port injection method, injecting fuel directly into the cylinder of the internal combustion engine can effectively improve the response speed of the internal combustion engine, improve the charging efficiency, and further improve the thermal efficiency of the internal combustion engine and reduce harmful emissions through fuel stratification, so that the direct injection internal combustion engine Its power, economy and emissions...

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Problems solved by technology

[0005] Aiming at the current problems of lubrication, heat dissipation and layout difficulties faced by the injection system when the gas-liquid two-phase fuel is combusted in the cylinder at the same time, in order to enable the internal combustion engine to further realize energy saving and emission reduction by using gas-liquid two-phase fuel combined direct injection and combustion , the present invention provides a gas-liquid two-phase fuel injection system and method for a single-nozzle internal combustion engine

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