Study On The Experimental System Design And Simulation Of Hybrid System Based On The Rotary Engine

The increasing quantity of vehicles results in a large of energy consumption and serious environment pollution. Hybrid electric vehicle technology can not only reduce emissions of car, but also reduce fuel consumption and increase power performance. Supported by the project of central university basic scientific research fund (Central South University) 'integration characteristic and control of hybrid power system based on rotary engine', the concept of rotary engine based hybrid power system was put forward, parameter matching and parts selection for the entire system was carried out. The main contents and results are shown as follows:(1) According to the characteristics of rotary engine, a rotary engine based hybrid power system was designed, the parameters of foremost parts were matched and the parts were selected. The power coupling mechanism-planetary gear and the reduction gear were designed. The design of system parameters can offer theory support for test bench construction.(2) The planetary gear model was built in 3D drawing software. Simulation software was used to simulate and validate the designed planetary gear model. According to the simulation results, the planet carrier can run steady in theory rotation speed.(3) The rotational speed switching of planetary gear system was simulated with state of starting, low load and hybrid. The results show that:the system shall be driven by electric motor to reduce fuel consumption when starting and speed lower than 38km/h. When speed is between 38km/h and 144km/h, the system shall drive by engine, the residue power can be used for power generation. When speed is higher than 144km/h, the system is driven by engine and motor together.(4) The simulation model of road condition was built and the dynamic output of motor and engine in different road conditions were analyzed. The output of planetary gear in EUDC virtual road condition was also studied. The results show that:the following performance of planetary gear system to road conditions is good; when system demands change, the planetary gear can response the speed change rapidly. (5) A torque compound model was built in Matlab/simulink. The simulation results show that the torque of the three components in the planetary gear conforms to a fixed relation. When the torque of one component is fixed, the other two can be known from the relation.The simulation results show that:the designed hybrid power system is correct and effective; the planetary gear is reliable and is able to simulate the output of engine and motor. The research lays a foundation for further experiment and offers fundamental basis for research of rotary engine based hybrid power system.