Fuel injection control method of engine

Abstract

The invention discloses a fuel injection control method of an engine. The method comprises the following steps of: establishing an oil pressure pulsation working condition table; setting a burning roughness reference value; if the current working condition of the engine is the oil pressure pulsation working condition and the current burning roughness is more than the burning roughness reference value, performing oil injection phase intervention of the engine during one intervention period, or else, not performing the oil injection phase intervention of the engine; and after one intervention period, if the current working condition of the engine is the oil pressure pulsation working condition and the current burning roughness is less than the burning roughness at the beginning moment of the intervention period, continuously performing the oil injection phase intervention of the engine, or else, stopping the oil injection phase intervention of the engine. According to the fuel injection control method of the engine disclosed by the invention, the oil injection phase intervention can be carried out in real time according to requirements; and the oil pressure pulsation in an oil track of the engine is effectively reduced.

Description

technical field [0001] The invention relates to engine technology, in particular to an engine fuel injection control method. Background technique [0002] With the increasing depletion of energy and the increasing awareness of environmental protection, people's requirements for automobile technology continue to increase. The electronic control system using multi-point injection on the engine, because of the flexible control method, can realize the precise control of the engine air-fuel ratio, and has become the standard configuration of passenger cars. [0003] The electronic fuel injection control system takes an electronic control unit (ECU) as the control center, uses various sensors installed on different parts of the engine to measure various operating parameters of the engine, and controls the engine according to the control program set in the ECU. The fuel injector precisely controls the fuel injection quantity, so that the engine can obtain the best concentration of...

AI Technical Summary

Problems solved by technology

In the engine fuel injection control method described in Chinese Patent Application No. 201110142324.5, during the actual vehicle operation, as long as the calibrated working conditions occur, the fuel injection phase intervention is performed, but the calibrated working conditions sometimes cannot accurately reflect the actual fuel injection volume of the engine. It cannot accurately reflect the real-time concentration of the mixture, so under the calibrated working conditions, it is impossible to judge whether to perform injection phase intervention according to real-time needs. In addition, after the injection phase intervention, it is impossible to judge whether the expected effect has been achieved.

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