Abstract
Air-powered engine is a promising one of the low emission engines, for the advantages of its simple structure and complete zero-pollution. In this paper, the two-stage expansion Air-powered engine (TSEAPE) was studied in theory fi rstly and then experiments. Based on the model of TSEAPE that has been developed on the thermodynamics and mechanics analysis, the effects of bores ratio on the performance of TSEAPE are investigated by simulation. The results of simulation indicate that the TSEAPE will performance well when its bore ratio is about 1.4, which is a good balance between the power output and the efficiency. Guided by the results of theory analysis, a TSEAPE was developed based on an existing internal-combustion engine. The experiment results of this prototype engine on a test bench show that TSEAPE runs stably on bore ratio 1.4 and has better performance at a low speed
