Abstract
City electric power decentralize reciprocating engine is fit to use to small scale power generation for home and so on. Fuel diversity is important and the efficiency is the most important. This paper shows the effect on thermal efficiency of mixtures rate. As a result, ethanol/gasoline mixture thermal efficiency is increase as mixture rate increase, kerosene/gasoline mixture thermal efficiency is hardly changed by mixture rate. However, both of fuel occurred nocking and the engine power was limited.
