A Super Knock Suppression Method Based on Multi-parameter Regulation

A super detonation and multi-parameter technology, applied in electrical control, engine control, fuel injection control, etc., can solve problems such as engine damage, achieve the effect of increasing scavenging intensity, avoiding high exhaust temperature, and improving engine torque

Active Publication Date: 2019-08-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a super knock suppression method based on multi-parameter regulation, which solves the problem of damage to the engine caused by continuous super knock without adding additional devices

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  • A Super Knock Suppression Method Based on Multi-parameter Regulation

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings, and n=2 is selected in a specific embodiment of the present invention.

[0027] The invention provides a method for suppressing super-knock based on multi-parameter regulation, the method comprising:

[0028] Step S1: Use the knock sensor to judge whether there is super knock in the engine cylinder during the working cycle, if yes, go to step S2;

[0029] Step S2: In the following 2 working cycles C 1 and C 2 In the process, the fuel injection timing of the cylinder with super knock is postponed, and at the same time, it is judged that the cylinder is in the next working cycle C 3 Whether superknock occurs, if not, then in C 3 restore the fuel injection timing of the cylinder to the calibration working condition; if yes, proceed to the next step.

[0030] Wherein, in step S2, delaying the fuel injection timing of the super-knocking cylinder includes: delaying the int...

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Abstract

The invention provides a super knock restraining method based on multi-parameter adjustment and control. The method comprises the following steps that whether super knock occurs on an air cylinder during working circulation of an engine or not is judged through a knock sensor firstly; if yes, in subsequent working circulation, the oil spraying moment is delayed, and meanwhile whether super knock continues to occur on the air cylinder or not is judged; if yes, the oil spraying quantity is improved, combination gas in the air cylinder is concentrated, and meanwhile whether super knock continues to occur or not is judged; if yes, in subsequent working circulation, the closing moment of an exhaust valve of the air cylinder is delayed, and whether super knock continues to occur on the engine or not is judged; and if yes, oil cut-off is conducted on the air cylinder, and the air cylinder is restored to a declared working condition after keeping several working circulation. According to the super knock restraining method based on multi-parameter adjustment and control, super knock can be effectively recognized, continuous occurrence of super knock is restrained, and the damage caused to the engine by continuous knock is lowered; and meanwhile, extra devices are not required, and thus cost increasing is avoided.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a super knock suppression method based on multi-parameter regulation. Background technique [0002] Direct injection miniaturization is an important way to realize energy saving and emission reduction of gasoline engines. However, with the increase of intake pressure and temperature of miniaturized gasoline engines, the combustion heat load in the engine cylinder will further increase. An abnormal combustion phenomenon prior to spark ignition was found. This abnormal combustion phenomenon is different from surface ignition and has randomness and intervals, which may cause regular knock or even super knock in the engine. Unlike conventional knock, which can be eliminated by retarding the ignition advance angle, since superknock precedes spark ignition, it cannot be suppressed by retarding the ignition timing. Super knock will be accompanied by extremely high e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02D41/40F02D13/02
Inventor 卫海桥冯登全饶小康华剑雄裴自刚潘明章
Owner TIANJIN UNIV
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