Performance improvement of liquefied natural gas (LNG) engine through intake air supply
Performance improvement of liquefied natural gas (LNG) engine through intake air supply
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DOI：
10.1016/j.applthermaleng.2016.05.031
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发表时间：
2016-06
影响因子：
6.4
通讯作者：
Qijun Tang;Jianqin Fu;Jing-ping Liu;Feng Zhou;Zhipeng Yuan;Zhengxin Xu
中科院分区：
文献类型：
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作者：
Qijun Tang;Jianqin Fu;Jing-ping Liu;Feng Zhou;Zhipeng Yuan;Zhengxin Xu
To improve the natural gas vehicle accelerating and climbing performance, the approach of intake air supply for LNG engine was proposed and then investigated. A set of intake air supply device was designed and coupled to a LNG engine. Then, the bench test of intake air supply for LNG engine was conducted under both transient and steady state conditions, and the performance of LNG engine with intake air supply was compared with the original engine. The results indicate that engine torque can be improved obviously at low-speed, while the specific gas consumption (SGC) is almost unchanged with intake air supply. At 1000 r/min, the torque can be increased by 31%, and the SGC is decreased by 1.64%. Based on the test results, the optimal injection pressure of supplied air at various speeds was determined. Finally, the vehicle test of intake air supply was also conducted under road conditions. Compared with the original natural gas vehicle, the acceleration time is decreased by 14.7–30% through intake air supply, and the higher gear ratio contributes to the better acceleration performance. Meanwhile, the response time of intake pressure can be decreased by 23.6–67.7%.
