Range Extender Electric Vehicle (REEV) is a complicated multi-domain engineering system. The road ability on a range extender electric vehicle (REEV) is depending on the balance of subsystems. The important drive components, especially batter y, electric machine, wheel and range extender unit are modeled. Vehicle simulation model named AVL Cruise has been used to simulate the balance of subsystems to increase road ability. The complex interactions among the components are taken into account in a complete multi-domain model. The power train system models have been developed, the dynamic behavior of REEV's is simulated under selected driving cycles using rule-based energy management strategy. According to the simulation results, the significant benefits of REEVs for performance and fuel consumption are proved.

Electric vehicles have several disadvantages compared to conventional vehicles, such as their road ability and vehicle weight. To overcome these problems, range-extended engine technology has been developed. A range extender is a generator set that consists of an internal combustion engine coupled with a generator that operates when it is required. A vehicle simulator was deployed to compare the performance of three types of range-extended engines i.e. 1-cylinder 389 cc, 1-cylinder 494 cc and 2-cylinder 988 cc gasoline engines. The best type chosen was afterwards to be coupled with an electric vehicle. The performance data of each internal combustion engine was collected using experiment and simulation data. Two types of driving cycle, the Federal Test Procedure cycle and Artemis Rural Road cycle, were chosen to compare the optimum road ability of the vehicle. The result shows that the 2-cylinder 988 cc range-extended engine has the best performance, with an electrical motor energy consumption decrease of up to 83.26%, fuel consumption increase for the range-extended engine of up to 3.91 L/km, and a road ability increase of up to 232.79% compared to a pure electric vehicle.

An experimental study was conducted to evaluate the performance and emission of spark ignition (SI)engine fuelled with CNG at low and high load condition. This study is the series activity of research, design and development of conversion kit for gas fuelled vehicle in the author laboratory. The SI engine that used in this study is Honda L15A, four cylinders, 1,497 cm 3 using electronic control unit. Three different fuel system namely standard gasoline fuel system, commercially CNGconversionkit and proposed CNG conversion kit designed by Research Centre for Electrical Power and Mechatronics -Indonesian Institute of Sciences, all of them utilized with fuel injection system and electronic control unit were used in this study. The test was conducted on the 25% and 80% throttle opening position with engine speed over 4,800 rpm. The results show that the maximum brake power at 25% throttle opening position of SI engine using commercially CNG conversion kit (19.00 kW) is almost same with SI engine using proposed CNG conversion kit (19.68 kW), while for 80% throttle opening position the maximum brake power of SI engine using proposed CNG conversion kit (38.67 kW) is higher than commercially CNG conversion kit (34.29 kW). The emission of CO and HC at 80% throttle opening position is lower than at 25% throttle opening position for both of SI engine using commercially and proposed CNG conversion kit.

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This paper discusses the manufacturing process of rotor radial turbo-expanders for small Organic Rankine Cycle systems using additive manufacturing machine Selective Laser Melting (SLM) machine. The process manufacturing consists of data preparation, build job process, and process finishing product. Data preparations are include material preparations, build data preparation using software 3D design Solidworks, support management with software magics and additive manufacturing software with Autofab for build job process on SLM machine. The results shows rotor with material Aluminum Silicon Powder (AlSi) can be made with either the appropriate geometry design within 5 hours with total cost for the whole processing is up to 11 milion IDR.