학술논문
A Study on Cold Emission Reduction of Direct-Injection Gasoline Engine by Controlling the In-cylinder Gas Properties (Third Report) / 筒内状態量制御による直噴ガソリンエンジンの冷間エミッション低減に関する研究（第3報）
Document Type
Journal Article
Author
Source
自動車技術会論文集 / Transactions of Society of Automotive Engineers of Japan. 2023, 54(6):1269
Subject
Language
Japanese
ISSN
0287-8321
1883-0811
1883-0811
Abstract
The unburned components that do not contribute to combustion emitted from internal combustion engines should be significantly reduced. In this study, enhancement of a post oxidation under cold conditions was investigated by controlling the in-cylinder gas properties of a directinjection gasoline engine equipped with a variable valve system. The combination of “Late Intake Valve Opening” and “Late Exhaust Valve Opening” functions was verified. The results showed that THC and PN were further improved due to the increased superheat, intake air flow enhancement, and re-burn effect of the exhaust process.