| Autor: |
Kumano, Kengo, Kimura, Hiroshi, Akagi, Yoshihiko, Matohara, Shinya, Uchise, Yoshifumi, Yamasaki, Yudai |
| Zdroj: |
International Journal of Engine Research (Sage Publications, Ltd.); Sep2023, Vol. 24 Issue 9, p4093-4103, 11p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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