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| High-altitude Thermal Balance Characteristics of the Boxer Piston Engine |
| Received:June 02, 2017 Revised:October 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2017.10.011 |
| KeyWord:gasoline engine boxer engine thermal balance atmosphere pressure |
| Author | Institution |
| ZHOU Guang-meng |
University of Military Transportation, Tianjin , China |
| YANG Chun-hao |
1.University of Military Transportation, Tianjin , China; 2.Naval University of Engineering, Wuhan , China |
| CHEN Lu-yang |
University of Military Transportation, Tianjin , China |
| LIU Rui-lin |
University of Military Transportation, Tianjin , China |
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| Abstract: |
| Objective To study on effects of atmospheric pressure at different altitude, especially effects of high-altitude conditions on thermal balance performance of boxer engine. Methods The thermal balance test of the boxer engine at different altitude (0-7000m) was carried out on a high altitude simulation test platform for the internal combustion engine. The characteristic parameters such as exhaust temperature and cylinder surface temperature were measured. The heat flux distribution characteristics were calculated. And the variation law of heat flux distribution with altitude was compared and analyzed. Results With the increase of altitude, both the exhaust temperature and the cylinder surface temperature of the gasoline engine gradually decreased. The higher the altitude was; the greater the drop in the cylinder surface temperature was. The effective power of the gasoline engine gradually decreased with the increasing altitude. The percentage of the residual loss gradually increased. The variation range increased at low speed. At the simulated altitude of 6000m and at 3000r/min, the effective thermal efficiency of the gasoline engine was less than 5%, while the percentage of residual loss reached more than 30%. Part of the gasoline didn’t even burn at this time. Conclusion The high altitude environment has a serious influence on the thermal balance performance of the boxer engine, which is one of the key factors to restrict the recovery of its high altitude performance. |
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