Treatment and Control Method of Super-knock Abnormal Combustion in Supercharged Gasoline Engine

Abstract

The invention provides a super-knock abnormal combustion control method for a supercharged gasoline engine, which relates to the technical field of a supercharged gasoline engine, comprising firstly collecting a knock signal through a knock sensor, and performing a process on the knock signal by a sensor signal processing module. processing; then the engine controller ECU detects the processed knock signal online in real time, analyzes it and judges the number of consecutive occurrences of super knock abnormal combustion and the cylinder, and according to the number of consecutive occurrences of super knock abnormal combustion, by using Step-by-step methods of enriching the mixture, reducing the valve overlap angle, reducing the engine load and finally cutting off the oil have effectively controlled the phenomenon of frequent super-knocking and abnormal combustion of the supercharged gasoline engine, and at the same time, taken into account the smooth driving of the whole vehicle Safety, while effectively protecting the engine from damage, improves the driving experience of vehicle users.

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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