Supercharged gasoline engine super knocking abnormal combustion processing control method

Abstract

The invention provides a supercharged gasoline engine super knocking abnormal combustion control processing method, and relates to the technical field of supercharged gasoline engines. The method comprises the steps that firstly a knocking signal is collected through a knocking sensor, and the knocking signal is processed through a sensor signal processing module; and then, an engine controller ECU detects the processed knocking signals online in real time, analyzes the knocking signals and judges the number of times of continuous occurrence of super knocking abnormal combustion and an air cylinder, according to the number of times of continuous occurrence of super knocking abnormal combustion, by adopting a processing method of gradually enriching mixed gas, reducing a valve overlap angle, reducing engine load and finally cutting off fuel, the phenomenon of frequent abnormal combustion of super knocking of the supercharged gasoline engine is effectively controlled, meanwhile, the smoothness of whole vehicle driving is considered, the engine is effectively protected against damage, and meanwhile, the driving experience of a whole vehicle user is improved.

Description

technical field [0001] The invention relates to the technical field of supercharged gasoline engines, in particular to a method for controlling and processing super-knock abnormal combustion of a supercharged gasoline engine. Background technique [0002] Gasoline engine supercharging technology is one of the advanced gasoline engine technologies widely used in domestic and foreign automobile industries. It is the mainstream technology to realize the miniaturization and low speed of gasoline engines, and greatly improve the power of gasoline engines and reduce fuel consumption. However, after applying this technology, while the gasoline engine can output higher torque and power, the peak pressure and combustion temperature peaks in the cylinder will also increase significantly, and before the spark plug is ignited, the fuel / air mixture is prone to self-ignition, and also Immediate pre-ignition (also known as super knock in the industry). [0003] The super-knock combustion ...

AI Technical Summary

Problems solved by technology

The method of cutting off the engine oil can effectively prevent the super knock from happening again and continuously after the occurrence of super knock, but after a certain cylinder of the engine is cut off and stops working, it will cause large fluctuations in the engine running speed and output torque, and the whole vehicle will not run smoothly , which seriously affects drivability and needs to be optimized

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