An investigation on simulation models and reduction methods of unburned hydrocarbon emissions in spark ignition engines (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- An investigation on simulation models and reduction methods of unburned hydrocarbon emissions in spark ignition engines (PDF)
- 发表刊物：
- Combust Sci Tech
- 摘要：
- In this paper, the formation mechanisms of unburned hydrocarbons in the cylinder of spark ignition engine are investigated and the prediction model of unburned hydrocarbon formation and desorption in top land crevice, in the layers of lubricating oil on the cylinder liner and in deposits on the combustion chamber in spark ignition engines are established. The effects of
different top land crevice widths, engine speeds, air fuel ratios and spark advance angles on engine exhaust unburned hydrocarbons are investigated. It is shown that the optimum width of engine top land crevice is 0.32 mm (1.3 times of the two wall quenching distance), thus the flame can get
into the bottom of crevice and burns out all of the accumulated unburned hydrocarbons in it, consequently the engine exhaust hydrocarbons can be greatly reduce by 35 - 50% and with less penalty on engine power output and fuel economy (0.5 - 1.5% loss in power output and I - 3% loss in fuel economy), the predicting values by the models match well with the experimental results
- 合写作者：
- Zuohua Huang, Keyu Pan, Jijun Li
- 卷号：
- 115: 105-123
- 页面范围：
- 105-123
- 是否译文：
- 否
- 发表时间：
- 1996-10-18