| dc.description.abstract | This thesis aims to develop and design a limacon slide-rotating plate gasoline rotary engine, which is smaller and lighter than the traditional reciprocating gasoline engine (size and weight are about one-fifth of the traditional reciprocating engine). The additional advantage of this engine is that it has four times power output per 720° (three times more than the reciprocating engine). Such a rotary engine is suitable to be used in military UAV engines or as a range-extender for electric vehicles. Based on our previous design of a limacon slide rotating plate rotary engine compression part (Yin-Li Chen, 2019), this research further manufactures the power part. Combining of the compression part with the power part, the dynamics testing of the limacon slide-rotating plate rotary engine is performed. We use an AC motor to adjust different speeds to measure engine displacement, pressure change, torque loss. Furthermore, we analyze the pressure and torque changes from different angles. The photoelectric sensor module is connected with the Arduino motherboard to read the rotation speed of a grating disk. And then we adjust the carburetor. A stoichiometric fuel to air equivalence ratio(ψ=1), where the fuel is the commercial unleaded gasoline 95. We let the fuel/air mixture compress into the power part, then we use a car spark plug to ignite the mixture for the ignition test. Unfortunately, the ignition test was unsuccessful. There are still several problems to be overcome before a successful engine operation could be achieved. The first problem is the friction problem of the slide-rotating plate. We need to develop a counter-balanced mechanism when the slide-rotating plate rotates, when the rotational speed increases, the centripetal force increases. Thus, the slide-rotating plate is excessively rubbing the rotor housing. It leads to the friction problem between the slide-rotating plate and the rotor housing, resulting in more torque needed in order to run the engine. For example, when the speed setting value is 150 rpm, it only requires 5 N•m of torque to run the engine, but the torque required to run 1050 rpm increased to 20 N•m. The other problem is the gas leakage problem. The gas leakage problem inside the rotor housing has been solved, but there is still an unresolved gas leakage problem between the compression part and the power part. Poor gas tightness problem can result in poor compression. The maximum compression pressure measured is 1.843 bar, which is only 31.2% of the design value of 5.9 bar. When the speed setting value is 450 to 900 rpm, the actual displacement of the power part exceeds the theoretical displacement of the power part. This means that there is gas leakage from the compression part to the power part. Because of the aforesaid two problems, the ignition test cannot be smoothly carried out. Although we cannot operate successfully the limacon slide-rotating plate gasoline rotary engine, we identify the problems to be solved. This will help us to develop an innovative rotary engine in the future. | en_US |