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| Analysis of Combustion and Emission Characteristics of Methanol/Gasoline Fuels in Direct Injection Miller Cycle Gasoline Engine |
| DOI：10.13949/j.cnki.nrjgc.XXXX.XX.001 |
| Key Words:gasoline direct injection engine compression ratio miller cycle methanol particle size distribution |
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| 摘要点击次数: 68 |
| 全文下载次数: 0 |
| Abstract:In order to explore the particle number (PN) emission characteristics of direct injection gasoline engine after cold start, the cluster operation points of direct injection gasoline engine for a world light vehicle test procedure test cycle was selected, the effects of fuel injection pressure and injection advance angle on PN emissions were studied on engine test bench, and the PN emission of worldwide harmonized light vehicles test cycle (WLTC) was compared based on the results of PN test bench optimization. The results show that the PN emission is relatively low when the injection advance angle is in the range of 240~280° crank angle, and when the injection pressure is increased, the PN emission can be reduced by about 40%~70%, PN in the first phase of the direct injection vehicle decreased by about 40%, and the complete test cycle PN emissions decreased by about 30%. It can be concluded that the PN emission can be greatly reduced by selecting reasonable injection advance angle and increasing injection pressure under low load condition after vehicle cold start. |
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