A method for controlling the smooth running of an engine

A control method and engine technology, applied in the direction of engine control, automatic control, automatic control, etc., can solve the problems of engine jitter and uneven energy of engine cylinders, and achieve the effect of reducing energy fluctuation, solving jitter problems, and being simple and easy to control.

Active Publication Date: 2020-04-07
UNITED AUTOMOTIVE ELECTRONICS SYST
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Problems solved by technology

[0004] The purpose of the present invention is to provide a control method for the smooth running of the engine, so as to solve the phenomenon that the existing engine cylinder energy unevenness causes the engine to shake

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  • A method for controlling the smooth running of an engine

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Embodiment 1

[0030] refer to figure 1 , which shows a flow chart of the method for controlling the smooth running of the engine in this embodiment.

[0031] S1: Determine the cylinder with large energy fluctuation and determine that the energy fluctuation is not caused by special working conditions. Specifically, to determine the cylinders with large energy fluctuations, the inventors found that the engine management system can obtain the segment time of each cylinder of the engine when the engine is running, and the comparison with the segment time of the cylinders adjacent to the work can be reflected. The working energy status of the cylinder. Segmentation time refers to the effective work time of each cylinder that is started, that is, the time used in the power stroke, which can be obtained by the engine management system. If the working energy of a certain cylinder is large, its running speed will be faster during the power stroke. The segmentation time is also small. If the absol...

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Abstract

The invention provides a control method for engine operation smoothness. The control method for engine operation smoothness comprises the following steps that the work energy of each air cylinder is monitored, and the air cylinder needing energy correction is judged out; the energy correction direction of the air cylinder needing energy correction is judged out, and the correction direction of anignition advance angle of the air cylinder is determined according to the energy correction direction; and the ignition advance angle of the air cylinder is corrected until the work energy of the aircylinder is normal or the ignition advance angle of the air cylinder reaches the correction limit value. By the adoption of the control method for engine operation smoothness, the shaking problem generated in the operation process of an engine is solved to a certain extent, and the drivability and comfort performance of an automobile are improved; and furthermore, since the engine operates smoothly, the service life of the engine is prolonged to a certain extent.

Description

technical field [0001] The invention relates to the field of engines, in particular to a method for controlling the running stability of the engine. Background technique [0002] In order to reduce vehicle exhaust emissions and meet the increasingly stringent requirements of emission regulations, higher technical requirements are put forward for vehicles equipped with ignition internal combustion engines in terms of control. Cylinder-specific control technology, as one of the technologies for reducing vehicle emissions, has been applied by many car manufacturers. [0003] Cylinder-specific control technology corrects the fuel injection volume of each cylinder according to the difference in intake air volume of each cylinder of the engine, so that the air-fuel ratio of all cylinders is close to 1, ensuring full combustion of the mixer and reducing emissions. However, the application of this control technology inevitably leads to another problem: since the intake air volume o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02P5/145
CPCF02D41/0085F02P5/145
Inventor 孙志文李君赵燕徐磊
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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