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A method for applying ignition advance degradation based on the duration between two knocks

A kind of ignition advance and knocking technology, applied in the direction of engine ignition, forward/reverse ignition, spark ignition controller, etc., can solve the problems of poor safety, loss of consumption and performance, suboptimal remedial measures, etc., to protect the engine , the effect of reducing fuel consumption

Active Publication Date: 2022-05-27
PEZHO SITROEN AUTOMOBILS SA
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AI Technical Summary

Problems solved by technology

[0004] The advantage of the first type of ignition advance correction method is that it is very safe, however its disadvantage is that it leads to consumption and loss of performance due to unreasonable periodic withdrawal of ignition advance
[0005] The second method has the advantage of being more efficient in terms of consumption and engine performance, and the disadvantage of being less safe, especially when the need for correction is strong
[0008] Taking remedial action every time knock is detected is not optimal

Method used

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  • A method for applying ignition advance degradation based on the duration between two knocks

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Embodiment Construction

[0033] exist figure 1 In the curves of , the third knock during the first time interval occurs somewhere in the first time interval, however, within the scope of the present invention, the third knock may occur at any time during the first time interval.

[0034] refer to figure 1 , which shows the three curves mentioned above as a function of time t, the present invention relates to a remedy for predetermining the nominal first value Deg n after the detection of the first knocks Cl1, Cl2, Cl5 during engine operation Ignition advance downgrade DegAV method applied to a warm engine.

[0035] According to the present invention, the application of the remedial ignition advance degradation DegAV is discontinued when the second knock, which is the knock Cl3 in the figure, is not detected in the predetermined time interval T1s from the detection of the first knocks Cl1, Cl2, Cl5 .

[0036] exist figure 1 , the first knock is set to the knock Cl1 on the left, the knock Cl1 detect...

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Abstract

The invention relates to a method for applying a remedial ignition advance degradation (DegAV) of a predetermined nominal first value (Deg n) to a heat engine after detection of a first knock (Cl1, Cl2, Cl5) during engine operation, which The method is characterized in that the remedial ignition pre-degradation is aborted when the second knock (Cl3) is not detected within a predetermined first time interval (T1s) from the detection of the first knock (Cl1, Cl2, Cl5) (DegAV) applications.

Description

technical field [0001] The present invention relates to a method of applying remedial spark advance degradation to a heat engine when knocking is detected, taking into account the duration between two consecutive knocks. Background technique [0002] According to the prior art, there are various methods for correcting the spark advance applied to a heat engine to avoid knocking. These methods are mainly based on a one-time early retraction to eliminate knocking and implement early corrections when knocking is detected. However, there is variety in the application of this correction, which results in advantages and disadvantages depending on the choices implemented. [0003] Currently, there are mainly two different types of spark advance correction methods. The first method determines the final advance to be applied in the next cycle, while the second method determines the so-called base advance, the minimum value between the optimum spark advance and the knock limit advan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02P5/152
CPCF02P5/1523F02P5/1526Y02T10/40
Inventor 菲利克斯·加利恩塞巴斯蒂安·布雷诺斯欧苔姆·赫拉厄德
Owner PEZHO SITROEN AUTOMOBILS SA
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