Abstract
The purpose of this paper is to investigate working performance for a four-stroke piston type compressed air engine (CAE) via experimental research. A conventional internal combustion engine(IC engine) is modified to a four-stroke CAE and a mathematical model is set up. Working performances are investigated by output torque, power, air consumption, exhaust pressure, exhaust temperature and cylinder pressure on a test bench. The CAE is installed on a vehicle for the road test. The experiment and analysis show several meaningful results. The increase of the supply pressure will result in the increase of the rotational speed, and it can effectively improve the output torque and power. However, it can lead to an increase in air consumption. The success of this application demonstrates compressed air cars are likely to be industrialized duo to their zero pollution and zero emissions.
Highlights
Over the recent decades, environmental protection and reducing carbon dioxide (CO2) emission become crucial issues worldwide
Working characteristics of the four-stroke compressed air engine (CAE) can be investigated by output torque, power, air consumption, exhaust pressure, exhaust temperature and cylinder pressure
The supply pressure is set to 20bar and 30bar, respectively, and the resistance torque is set to 2Nm, the performance parameters are recorded at different rotational speeds and the test results are shown in figure 6~figure 9
Summary
Environmental protection and reducing carbon dioxide (CO2) emission become crucial issues worldwide. Exhaust gas from internal combustion (IC) engines contributes largely to CO2 emissions, and IC engines pollute the environment seriously. In order to improve fuel consumption and protect the environment, researchers have been searching for environmentally friendly energies to replace conventional fossil fuels [1, 2]. Compressed air, as the working medium of the compressed air engine (CAE), is inexhaustible. A CAE has both the advantages of non-burning fuel and zero pollution, and there is no chemical reaction and high temperature in its working cycle [3, 4]. Compressed air can be generated through several ways, such as solar energy, wind energy and tidal energy [5], which does not rely on non-renewable energy
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