Engine idle speed control method and device and storage media

A technology of engine idle speed and control method, which is applied in the direction of engine control, combustion engine, machine/engine, etc., can solve the problems of engine idle speed instability and excessive fluctuation, and achieve the effect of improving idle speed stability and prolonging service life

Active Publication Date: 2020-03-27
WEICHAI POWER CO LTD
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Problems solved by technology

[0005] The invention provides an engine idle speed control method, device and storage medium to solve the problem of unstable engine idle speed and excessive fluctuation

Method used

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  • Engine idle speed control method and device and storage media
  • Engine idle speed control method and device and storage media
  • Engine idle speed control method and device and storage media

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Embodiment Construction

[0061]Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0062] At first the terms involved in the present invention are explained:

[0063] Crankshaft: The crankshaft is the core component of the engine. The crankshaft receives the driving force of the connecting rod and converts the up and down movement of the piston in the engine cylinder into the rotational movement of the crankshaft. Under certain timing control, multiple cylinders of th...

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Abstract

The invention provides an engine idle speed control method and device and storage media. The method comprises the steps that actual crankshaft tooth rotation speed and preset crankshaft tooth target rotation speed corresponding to a target air cylinder of an engine are obtained; corrected fuel injection amount of the target air cylinder is determined according to the actual crankshaft tooth rotation speed and the preset crankshaft tooth target rotation speed; and fuel injection amount of the target air cylinder is corrected according to the corrected fuel injection amount, and engine idle speed control is achieved. Due to the fact that crankshaft tooth rotation speed corresponding to the target air cylinder is related to the combustion quality and the fuel injection amount of the target air cylinder, the corrected fuel injection amount can be determined through the relationship between the crankshaft tooth rotation speed and the fuel injection amount, and then the fuel injection amountof the target air cylinder is corrected according to the corrected fuel injection amount, so that the moving speed of the target air cylinder reaches a preset value, the problems of unstable idle speed and excessive fluctuation in the engine idle speed process are solved, the idle speed stability of the engine is improved, and the service life of the engine is prolonged..

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an engine idle speed control method, device and storage medium. Background technique [0002] For diesel engines, the currently commonly used idle speed control method is PID closed-loop control based on the target idle speed value. For natural gas engines, the idle speed control method is not only the speed PID closed-loop control mentioned above, but also the air-fuel ratio closed-loop control method based on the oxygen sensor signal. [0003] In the prior art, the oxygen sensor is installed on the exhaust manifold, and by measuring the oxygen content in the exhaust manifold, the average value of the air-fuel ratio of each cylinder is calculated, and the idle speed of the engine is controlled by the average value of the air-fuel ratio. If an oxygen sensor is installed in each cylinder, the manufacturing cost and engine maintenance cost will be increased. [0004] Therefore, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/14F02D41/24F02D41/30
CPCF02D41/1401F02D41/2451F02D41/30F02D2041/1409F02D2200/101Y02T10/40
Inventor 魏倩雯曹石
Owner WEICHAI POWER CO LTD
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