A variable valve timing (VVT) mechanism has been applied in a high-speed direct injection (HSDI) diesel engine. The effective compression ratio (εeff) was lowered by means of late intake valve closing (LIVC), while keeping the expansion ratio constant. Premixed charge compression ignition (PCCI) combustion, adopting the Miller-cycle, was experimentally realized and numerically analyzed. Significant improvements of NOx and soot emissions were achieved for a wide range of engine speeds and loads, frequently used in a transient mode test. The operating range of the Miller-PCCI combustion has been expanded up to an IMEP of 1.30 MPa.
|出版ステータス||Published - 2008 12月 1|
|イベント||7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008 - Sapporo, Japan|
継続期間: 2008 7月 28 → 2008 7月 31
|Conference||7th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2008|
|Period||08/7/28 → 08/7/31|
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