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Engine Knock Closed-loop Control Method

A closed-loop control and engine technology, applied in the direction of engine control, engine ignition, engine components, etc., can solve problems such as the impact of engine continuity, and achieve the effect of reasonable adjustment methods

Active Publication Date: 2022-08-02
WEICHAI POWER CO LTD
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  • Description
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a closed-loop control method for engine knocking, so as to solve the technical problem that the control knocking method in the prior art is likely to affect the continuity of the combustion state of the engine

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  • Engine Knock Closed-loop Control Method
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Embodiment Construction

[0019] It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0020] like figure 1 and figure 2 As shown, an embodiment of the present invention provides a closed-loop control method for engine knocking. The closed-loop control method for engine knocking includes: obtaining the knocking frequency f of the engine and the current cycle knocking energy q, and according to the obtained knocking frequency f and the current cyclic knocking energy q to determine the knock intensity factor Q; obtain the limit knock intensity factor Q 0 , the knock intensity factor Q and the limit knock intensity factor Q 0 comparison; according to the knock intensity factor Q and the ultimate knock intensity factor Q 0 According to the comparison res...

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Abstract

The invention provides a closed-loop control method for engine knocking, comprising: acquiring the knocking frequency f of the engine and the current cyclic knocking energy q, and determining the knocking intensity factor Q according to the acquired knocking frequency f and the current cyclic knocking energy q ;Get the ultimate knock intensity factor Q 0 , the knock intensity factor Q and the limit knock intensity factor Q 0 comparison; according to the knock intensity factor Q and the ultimate knock intensity factor Q 0 According to the comparison result, the ignition advance angle is adjusted. Through the technical solution provided by the present invention, the knock intensity factor is used as the basis for adjusting the ignition advance angle and the EGR rate, which can solve the problem that the conventional knock control method easily affects the continuity of the combustion state of the engine. question.

Description

technical field [0001] The invention relates to the technical field of an engine knocking closed-loop control method, and in particular, to a closed-loop engine knocking control method. Background technique [0002] At present, for spark ignition engines, due to changes in fuel composition such as octane number, operating conditions such as intake air temperature, etc., it is easy to cause knocking, resulting in serious failures such as piston capping and cylinder pulling. How to effectively control the knocking and keep the power and economy unchanged as much as possible has always been a difficult problem in the industry. The traditional method of controlling knocking is to delay the ignition advance angle immediately after the knocking sensor detects that the knocking energy exceeds the limit value, and then slowly restore the ignition advance angle when it is no longer exceeded. [0003] However, although the traditional method of controlling knocking can control the kn...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02P5/152
CPCF02P5/152F02D41/0047
Inventor 徐帅卿李卫卫阳飞
Owner WEICHAI POWER CO LTD
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