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Air-fuel ratio control method and device for internal combustion engine

A control method, a technology for an internal combustion engine, applied in the computer field

Active Publication Date: 2020-07-07
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a method and device for controlling the air-fuel ratio of an internal combustion engine to solve the problem of controlling the air-fuel ratio of an internal combustion engine in dynamic working conditions

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  • Air-fuel ratio control method and device for internal combustion engine
  • Air-fuel ratio control method and device for internal combustion engine
  • Air-fuel ratio control method and device for internal combustion engine

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Embodiment Construction

[0054] The specific implementation manner of the present invention will be described in more detail below with reference to schematic diagrams. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0055] With the development of internal combustion engine technology, the intake system of internal combustion engines is becoming more and more complex. It is difficult to simulate and compensate the change process of air-fuel ratio under dynamic working conditions, and there are not many ways to deal with the dispersion of vehicles and oil products. At present, modules such as inlet oil film, gas path deviation, and vehicle and oil product dispersion usually have their own self-learning functions, but they are ...

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Abstract

The invention provides an air-fuel ratio control method and device for an internal combustion engine. An air-fuel ratio of a running state of the internal combustion engine in a current cycle is obtained, a correction coefficient of the running state in a next cycle is obtained according to the air-fuel ratio of the running state in the current cycle, and when the running state occurs in the nextcycle, fuel supply amount of the running state in the next cycle can be obtained according to pre-stored recorded fuel supply amount of the running state and the obtained correction coefficient. Therefore, an air-fuel ratio of the same running state in the next cycle can be corrected according to the air-fuel ratio of the internal combustion engine in the current cycle, thereby effectively controlling the air-fuel ratio of the internal combustion engine under dynamic conditions.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a method and device for controlling the air-fuel ratio of an internal combustion engine. Background technique [0002] Among the many factors that affect the emissions of internal combustion engines, the air-fuel ratio is one of the most important. The air-fuel ratio control in the steady-state working condition involves gas circuit calculation, oil circuit pre-control and closed-loop control of the oxygen sensor, which is relatively easy. However, the air-fuel ratio control under dynamic conditions is much more difficult than the air-fuel ratio control under steady conditions. [0003] It mainly involves the following issues. The first is the oil film in the intake port. In the internal combustion engine with intake port injection, the fuel injection adheres to the wall of the intake port to form an oil film. After the oil film volatilizes, it enters the cylinder together w...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14
CPCF02D41/1401F02D41/1475
Inventor 戴正兴方芳段周成
Owner UNITED AUTOMOTIVE ELECTRONICS SYST