Pre-ignition-prevention control method in spark-ignition engines by detecting precursory cycles with an ion-current sensor

Author:

Kumano Kengo1ORCID,Kimura Hiroshi1,Akagi Yoshihiko2,Matohara Shinya2,Uchise Yoshifumi3,Yamasaki Yudai4

Affiliation:

1. Hitachi, Ltd. R&D Group, Ibaraki, Japan

2. Hitachi Astemo, Ltd., Ibaraki, Japan

3. Hitachi Astemo Hanshin, Ltd., Hyogo, Japan

4. The University of Tokyo, Tokyo, Japan

Abstract

In gasoline engines with a higher compression ratio, abnormal combustion, such as pre-ignition and knocking, tends to occur due to higher temperature in the combustion chamber, which leads to lower engine performance. To prevent pre-ignition from occurring, we propose a pre-ignition-prevention control method that involves using an ion-current sensor integrated in an ignition system. The pre-ignition and precursory cycles are detected from the ion-current intensity and spark-discharge duration estimated from ion-current signals. Fuel-injection is increased to cool the mixture in the combustion chamber after the abnormal combustion (precursory) cycle is detected. In a commercial gasoline engine, it was demonstrated that our method can prevent pre-ignition combustion by setting a proper threshold for precursory-cycle detection. The effectiveness of the fuel-injection control was analyzed.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Ocean Engineering,Aerospace Engineering,Automotive Engineering

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Control Technologies for Advanced Engines and Powertrains: A Review;International Journal of Automotive Engineering;2024

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