Electronically controlled common rail gasoline injection system of internal combustion engine and gasoline injection control method of electronically controlled common rail gasoline injection system

Abstract

The invention discloses an electronically controlled common rail gasoline injection system of an internal combustion engine. The electronically controlled common rail gasoline injection system of the internal combustion engine comprises a singlechip, a pressure sensor, a driving motor, a fuel pump, a fuel pump output tube and a gasoline injection nozzle, wherein the driving motor is a direct-current brushless motor and drives the fuel pump in a connected manner; the fuel pump communicates with the gasoline injection nozzle by the fuel pump output tube; the pressure sensor is arranged on the fuel pump output tube and is connected with the singlechip; and the singlechip controls the driving motor and the gasoline injection nozzle in a connected manner. In addition, the invention also discloses a gasoline injection control method of the electrically controlled common rail gasoline injection system of the internal combustion engine. By the singlechip, fuel output pressure and starting time of the gasoline injection nozzle are adjusted in real time, and fuel injection is jointly controlled by the fuel output pressure and the starting time of the gasoline injection nozzle. The electronically controlled common rail gasoline injection system has the advantages of high adjustment precision, high adjustment speed, low energy consumption of the motor and long service life, so that fuel economization and emission reduction are realized effectively.

Description

technical field [0001] The invention relates to the technical field of gasoline injection, in particular to a gasoline injection system for an internal combustion engine and a fuel injection control method thereof. Background technique [0002] At present, the gasoline injection of the motorcycle engine is mainly controlled by the fuel output pressure of the electric fuel pump. Electric fuel pump structure such as figure 1 As shown, it includes a fuel tank 1, a fuel pump 2, a drive motor, a fuel pump output pipe 3, a pressure regulating valve 4, a fuel injector 5, and a fuel return pipe 6. The pressure regulating valve 4 is generally a mechanical structure, which is arranged on the output pipe 3 of the fuel pump and communicates with the fuel oil return pipe 6 . The driving motor of the fuel pump 2 is a DC brushed motor, and its voltage does not change during operation, which is a set value. Therefore, the output pressure of the fuel needs to be controlled through the pres...

AI Technical Summary

Problems solved by technology

The electric fuel pump of this kind of mechanical pressure regulating valve has defects such as low pressure regulation accuracy, waste of fuel pump motor power, and complicated oil return pipeline.

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