Experimental Research on the Performance of a Four-stroke Compressed Air Engine

This study presents a theoretical model and an experimental investigation of a piston four-stroke engine driven by compressed air. The experiments in this study have used a test bench to examine the output torque and power performance of compressed air engine(CAE) at different working conditions. In addition, good agreement of simulation results is obtained between the model and the test. The results show that, as supply pressure increases, the output torque and power increase. The output torque and the power are maximized when the intake advance angle is - 70° CA, and the increase of the intake sustain angle will result in the increase of the torque and power. Consequently, this study of this paper will provide a theoretical and an experimental basis for further study on optimizing design of CAE.