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Engine knock closed-loop control method

A closed-loop control, engine technology, applied in engine control, engine ignition, engine components, etc., can solve problems such as engine continuity effects, and achieve a reasonable adjustment method.

Active Publication Date: 2022-05-10
WEICHAI POWER CO LTD
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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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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 an engine knock closed-loop control method which comprises the steps that the knock frequency f of an engine and the current cycle knock energy q are obtained, and a knock intensity factor Q is determined according to the obtained knock frequency f and the current cycle knock energy q; acquiring a limit knock intensity factor Q0, and comparing the knock intensity factor Q with the limit knock intensity factor Q0; and the ignition advance angle is adjusted according to the comparison result of the knock intensity factor Q and the limit knock intensity factor Q0. According to the technical scheme, the knocking intensity factor is used as the basis for adjusting the ignition advance angle and the EGR rate, and the technical problem that in the prior art, a knocking control method easily affects the continuity of the combustion state of an engine can be solved.

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