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http://dx.doi.org/10.7842/kigas.2011.15.5.050

Experimental Study on the Performance Characteristics of Air Hybrid Engine  

Lee, Yong-Gyu (Engine Research Team, ECO-machinery Division)
Kim, Yong-Rae (Engine Research Team, ECO-machinery Division)
Kim, Young-Min (Engine Research Team, ECO-machinery Division)
Park, Chul-Woong (Engine Research Team, ECO-machinery Division)
Choi, Kyo-Nam (Engine Research Team, ECO-machinery Division)
Jeong, Dong-Soo (Engine Research Team, ECO-machinery Division)
Publication Information
Journal of the Korean Institute of Gas / v.15, no.5, 2011 , pp. 50-56 More about this Journal
Abstract
A preliminary experimental study of new concept air hybrid engine, which stores compressed air in the tank during braking and re-use it to propel vehicle during crusing or acceleration, was carried out in this study. A single cylinder engine was modified to realize the concept of air hybrid engine. Independent variable valve lift system was adopted in one of the exhaust valves to store the compressed air into the air tank during compression period. An air injector module was installed in the place of spark plug, and the stored compressed air was supplied during the expansion period to realize air motoring mode. For air compression mode, the tank with volume of 30 liter could be charged up to more than 13 bar. By utilizing this stored compressed air, motoring work of 0.41 bar of IMEP(Indicated mean effective pressure) at maximum can be generated at the 800rpm conditions, which is higher than the case of normal idle condition by 1.1 bar of IMEP.
Keywords
air hybrid engine; compressed air; air compression mode; air motoring mode; variable valve lift; variable valve timing;
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