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A control method and storage medium for anti-knock interference of an engine

A technology of interference control and engine, applied in the direction of engine control, machine/engine, electrical control, etc., can solve the problem of coefficient calibration uncertainty, engine vibration damage, etc., to reduce the risk of damage, reduce the impact, and avoid measurement errors. Effect

Active Publication Date: 2021-07-06
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this strategy also brings risks, that is, the real knock of the engine is missed, which will cause vibration damage to the engine. At the same time, there is uncertainty in the calibration of the coefficients.

Method used

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  • A control method and storage medium for anti-knock interference of an engine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A 1.5T engine runs under high-speed full-load conditions such as 4500rpm@100% load. The ECU converts the knock intensity of the current engine operating condition in real time through the integral signal of the knock sensor, and compares it with the knock intensity threshold of the current operating condition. Calculate the knock intensity of the third cylinder of the engine is greater than the threshold, the engine ECU triggers the anti-knock interference strategy conditions and enters the anti-knock interference control strategy; calculates the frequency of knocking at the current 3-cylinder knock center frequency of 12kHz, and uses this to determine the knock center The corresponding knocking frequency value is obtained through frequency learning; the comparison results show that the knocking frequency of 16kHz is the lowest; 16kHz is selected as the latest learning value as the appropriate knocking center frequency for this working condition, so as to reduce the possi...

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Abstract

The invention relates to the technical field of engine control, in particular to an engine anti-knock interference control method and a storage medium. Acquire the knock intensity of the engine combustion cylinder under the current working condition in real time; judge whether the knock intensity is greater than the set threshold under the current working condition; when the knock intensity is greater than the set threshold under the current working condition, center the The frequency is updated, and the updated center frequency is the center frequency with the minimum frequency of knocking intensity greater than the set threshold; knocking control is performed based on the updated center frequency. It can minimize the impact of the interference signal on knock judgment in knock control, effectively prevent misjudgment and missed judgment of knock, and avoid the interference of knock detection due to mechanical noise and the impact of knock sensor installation position on each combustion cylinder. Measurement error.

Description

technical field [0001] The invention relates to the technical field of engine control, in particular to an engine anti-knock interference control method and a storage medium. Background technique [0002] Engine knocking is a condition of abnormal combustion of the engine, which will specifically reduce the torque of the engine and seriously damage the life of the engine. At present, the electronic control system of the engine uses the knock sensor, which is the The vibration sensor signal is used to judge whether the engine knocks. If knocking occurs, the ECU controls the ignition angle of the engine to quickly retreat the angle. By reducing the ignition angle, the engine is controlled to the operating range without knocking to protect the engine. [0003] When mechanical noise occurs in the engine knock window and coincides with the frequency of the knock shock wave, the engine is prone to interference, and the ECU will directly judge that the engine has knock, and the ign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D41/26
CPCF02D41/0002F02D41/26F02D2200/101
Inventor 潘洪健陈龙许瑞邹亚
Owner DONGFENG MOTOR CORP HUBEI