A kind of gas engine starting control method

Abstract

The invention discloses a starting control method of a gas engine. Firstly, a basic ignition advance angle and a basic air-flue ratio are set in an ECU; then the ECU compares a rotation speed signal of an engine crankshaft with the preset rotation speed, and whether the engine is in a starting state or operating states is judged; when in the starting state, the ECU conducts starting state amendment according to the current temperature signal of cooling liquid of the engine; when in the machine cooling operating state, the ECU conducts machine cooling operating state amendment on the current ignition advance angle and the current air-flue ratio according to the current temperature signal of cooling liquid of the engine; and when in a machine heating operating state, the basic ignition advance angle and the basic air-flue ratio are adopted. The starting state and the operating states are distinguished, different ignition advance angles and air-flue ratios are adopted at different states, the overall performance of the engine can be optimized, and therefore the engine can always keep the good performance index whether in which state, especially the cold starting performance of the engine can be improved, and adaptive capacity of the engine to the environment is enhanced.

Description

technical field [0001] The invention belongs to the technical field of engine start control, and in particular relates to a start control method for a gas engine. Background technique [0002] With the shortage of energy and people's higher and higher requirements on the performance of vehicle engines, natural gas engines operate in a wider range of environments. Engines need to be suitable for various harsh environments and maintain good performance indicators. The ignition advance angle is a crucial parameter for the engine, and the rationality and control accuracy of the ignition advance angle setting directly affect the engine's power, economy, and emissions. Electronic control technology is widely used in automobiles, which can realize digital control of the engine. The electronic control system can realize the best air-fuel ratio and ignition advance angle control according to various operating conditions of the engine, so that the mixture can be fully burned and the e...

AI Technical Summary

Problems solved by technology

Tests have proved that if the same ignition advance angle and air-fuel ratio are used in the starting state and running state of the gas engine, the control effect on cold start is not obvious, or even have the opposite effect

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