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Method and device for determining fuel injection angle in single camshaft mode of diesel engine

A diesel engine and a technology to determine the method, which is applied in the direction of engine testing, engine components, engine control, etc., can solve the problems affecting combustion effect, engine power and emission performance, etc., and achieve good fuel injection combustion effect, high accuracy, The effect of improving power and emission performance

Active Publication Date: 2020-09-29
WEICHAI POWER CO LTD
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  • Application Information

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Problems solved by technology

The deviation of the fuel injection advance angle will affect the combustion effect, and then directly affect the power and emission performance of the engine

Method used

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  • Method and device for determining fuel injection angle in single camshaft mode of diesel engine
  • Method and device for determining fuel injection angle in single camshaft mode of diesel engine
  • Method and device for determining fuel injection angle in single camshaft mode of diesel engine

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0043]Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have meaning...

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Abstract

The invention discloses a determining method and device for the oil injection angle in a diesel engine single camshaft mode. The method comprises the steps that a current camshaft signal is collected;current rotation speed data of a camshaft are acquired according to the camshaft signal; a value of a current segment corresponding to the current camshaft signal is calculated according to the current rotation speed data; a value of a next segment of the current segment is estimated through a weighted mean method; a corrected value is calculated through a value of a previous segment of the current segment; a predicted value of the next segment is obtained by adding the corrected value to the estimated value of the next segment; and the oil injection advance angle is calculated through a camshaft signal effective edge corresponding to the next segment and the predicted value of the next segment. According to the method, a value of the next segment cycle can be estimated according to information acquired from a camshaft position sensor signal when a camshaft position sensor fails, the estimated result accuracy is high, the deviation of the oil injection advance angle calculated throughthe estimated value is small, the oil injection combustion effect is good, and the power and emission performance of an engine are improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method and a device for determining a fuel injection angle in a single camshaft mode of a diesel engine. Background technique [0002] When the injector starts to inject oil, the crankshaft rotation angle from the piston to the top dead center is called the injection advance angle. The fuel injection advance angle is of great significance to the combustion of the engine. At the same time, it can have a great impact on noise, emissions, and fuel economy. It is of great significance to calculate the fuel injection advance angle and ensure that the engine works at the best fuel injection advance angle. The crankshaft position sensor can be used to determine the position of the crankshaft, that is, the angle of rotation of the crankshaft, and it can also be used to detect the engine speed, so it is also called a speed sensor. When the crankshaft position sensor fails, the speed an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02M65/00
CPCF02M65/00
Inventor 覃艳孙潇王涛卫文晋
Owner WEICHAI POWER CO LTD
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