Combustion characteristics and particulate emissions in a natural-gas direct-injection engine-effects of the injection timing and the spark timing (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Combustion characteristics and particulate emissions in a natural-gas direct-injection engine-effects of the injection timing and the spark timing (PDF)
- 发表刊物：
- J Automobile Eng
- 摘要：
- In the present study, the effects of the injection timing and the spark timing on the combustion characteristics and particle emission were investigated. The particulate number concentration and size distribution were measured using the electrical low-pressure impactor. The combustion parameters were calculated from the cylinder pressure data. The results indicate that the combustion versus the injection timing is primarily dependent on the mixing quality of the air–fuel mixture. The particulate number concentration increases as the fuel injection is advanced but the particle size distribution is not affected significantly with different
injection timings. This is probably related to the in-cylinder combustion. The initial combustion duration increases as the spark timing is advanced and the fastest rapid combustion duration is obtained at the maximum brake torque spark timing. As the fuel injection timing and spark timing are advanced, the particle number levels are increased but the particle size distribution shows few variations. Most of the particulates are in the nanoparticle size range. The amounts of nitrogen oxide and hydrocarbon emissions increase
with advanced fuel injection timing and spark timing, and the carbon monoxide concentration experiences small variations under all operation conditions.
- 合写作者：
- Liu YF, Liu B, Liu L, Zeng K, Huang ZH
- 卷号：
- 2010, 224(8): 1071-1080
- 页面范围：
- 1071-1080
- 是否译文：
- 否
- 发表时间：
- 2010-08-12