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| Effects of Altitude Environment on High-power Diesel Engine Starting Process |
| Received:May 30, 2017 Revised:October 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2017.10.002 |
| KeyWord:altitude environment diesel engine starting process combustion delay period spray characteristic |
| Author | Institution |
| WANG Xian-cheng |
Academy of Armored Force Engineering, Beijing , China |
| MA Ning |
Academy of Armored Force Engineering, Beijing , China |
| WANG Xue |
Academy of Armored Force Engineering, Beijing , China |
| SUN Zhi-xin |
Academy of Armored Force Engineering, Beijing , China |
| JI Shi-Wen |
Academy of Armored Force Engineering, Beijing , China |
| LIU Da-ke2 |
Academy of Armored Force, Bengbu , China |
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| Abstract: |
| Objective To study influence rules of altitude environment on starting process of high-power diesel engine. Methods The starting process of a 12-cylinder diesel engine was tested respectively in plateau and plain to analyze the rotational speed and cylinder pressure of diesel engine in different environment. The laws on change of ignition delay period in different environment were compared and simulating calculation on spray characteristics in different environment were carried out. Results The diesel engine was prone to suffer from phenomenon such as stagnation or even misfire in altitude environment. The combustion delay period declined rapidly in accelerating stage, and declined gently in transition stage. The combustion delay period on altitude environment was longer and the volatility was bigger up to 0.9 ms than plain environment. The spray penetration on altitude environment formed faster, and the main part of spray was closer to the wall of combustion chamber. Conclusion The altitude environment makes the spray penetration in starting the engine longer. The wall impingement of spray reduces the quality of the formation of mixed gas and makes the combustion delay period longer, causing the phenomenon of stagnation and even misfire in the diesel engine starting process of the altitude environment. |
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