Engine ignition control and fuel injection control methods based on engine cycles

Abstract

The invention discloses engine ignition control and fuel injection control methods based on engine cycles. The engine ignition control method comprises the steps of a, judging the operation condition of an engine; and b, and independently controlling the ignition angle of advance and fuel injection quantity of the engine in each working cycle under the condition. According to the engine ignition control and fuel injection control methods, control for ignition and fuel injection of the engine is refined in each working cycle of the engine, control parameters (ignition time, fuel injection pulse width and fuel injection phase position) of all the working cycles of the engine are more accurate, the accuracy of the control parameters under the transition working condition is guaranteed, and finally, the dynamic property, economy and emission level of the engine are improved to the greatest extent.

Description

technical field [0001] The invention relates to an engine ignition and fuel injection control method, in particular to an engine cycle-based engine ignition control and fuel injection control method. Background technique [0002] Both the engine ignition system and fuel injection system are important components of gasoline engines. The ignition system is usually composed of batteries, generators, distributors, ignition coils and spark plugs. When the engine is working, the ignition time has a great impact on the engine's performance Influence, pre-ignition means that the spark plug ignites before the piston reaches the compression top dead center, and ignites the combustible mixture in the combustion chamber. From the moment of ignition until the piston reaches the compression top dead center, the angle that the crankshaft rotates during this period is called the ignition advance angle. The setting of the ignition advance angle plays a decisive role in the power, economy and...

AI Technical Summary

Problems solved by technology

[0003] Existing engine ignition control and fuel injection systems generally use operating condition control to control the ignition advance angle and fuel injection quantity of the engine. With the same ignition advance angle and fuel injection volume, this control method cannot achieve precise control of engine combustion under the transient action of the engine. In addition, the current engine fuel injection system generally determines the operating point according to the engine's operating speed and throttle load. , and then calibrate and match the ignition and fuel injection of the EFI system according to the engine performance level, operating state and combustion conditions at the operating point. Unstable operation or poor combustion and other related problems

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