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Method for controlling fuel injection by electric control unit

A technology of electronic control unit and fuel injection quantity, which is applied in electrical control, engine control, fuel injection control, etc., can solve the problems of excessive fuel consumption and poor quality of exhaust gas, and achieve the effect of easy combustion and reduced fuel consumption

Inactive Publication Date: 2008-07-30
CHINA VAGON AUTOMOTIVES HLDG CO LTD
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  • Abstract
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Problems solved by technology

The situation that the mixture in the cylinder cannot be completely combusted will result in excessive fuel consumption and poor exhaust gas quality.

Method used

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  • Method for controlling fuel injection by electric control unit
  • Method for controlling fuel injection by electric control unit

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Embodiment Construction

[0022] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] A method for controlling fuel injection by an electronic control unit provided by the present invention, as shown in Figure 1 is a flowchart of a method for controlling fuel injection by an electronic control unit of the present invention, the main steps of the method include:

[0024] S1. First, the ECU uses the method of obtaining the fuel injection quantity and fuel injection time during the fuel injection process in the prior art to calculate the fuel injection quantity and fuel injection time. In this embodiment, the air temperature signal and air pressure signal around the engine are collected. Quantity, after looking up the calibration data table obtained through the actual test stored in the designated register, the required fuel injection quantity is obtained, which is called the total injection quantity TI in this embod...

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Abstract

The invention relates to a method for an electric control unit controlling oil injection, the method comprises the following steps: the values of the oil injection segment times N and the oil injection interval time t are determined according to the type of an engine; the electric control unit uniformly divides the total oil injection mass and the corresponding oil injection time into N segments to obtain the N segment times oil injection mass and the corresponding oil injection time segment of each segment oil injection mass; the electric control unit controls an oil injection device to execute the continuous oil injection process, and thus the oil injection device can inject oil in the oil injection time segment according to the segment times to finish the oil injection mass corresponding to the oil injection time segment and to close the oil injection between every two adjacent oil injection oil segments; the time of controlling the closing of the oil injection is t. By using the method, the fuel (gasoline and diesel oil) is easy to vaporize in a cylinder; thus the oil gas mixture in the cylinder can be well and fully burned, and the best power performance can be achieved and the quality of the tail gas is optimized.

Description

technical field [0001] The invention relates to the technical control field of engine fuel injection, in particular to a method for controlling fuel injection by an electronic control unit. Background technique [0002] The traditional fuel injection technology of the engine is that the electronic control unit ECU calculates the corresponding fuel injection quantity according to the air temperature and air pressure factors around the engine, calculates the fuel injection and intake time through the crankshaft position sensor and the camshaft position sensor, and then conducts a one-time injection in the cylinder. fuel injection process. Such traditional fuel injection technology has certain drawbacks. Because the one-time fuel injection quantity is too large, the vaporization time of fuel (gasoline or diesel) in the engine cylinder will be lengthened accordingly, resulting in the uneven mixing ratio of the mixed gas composed of fuel and air. In this way, the concentration ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/40
Inventor 李朝晖张步亮吕国伟
Owner CHINA VAGON AUTOMOTIVES HLDG CO LTD
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