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 battery, 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

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 5hours with total cost for the whole processing is up to 11 milion IDR

Air pollution remains a big issue in many countries. One form of air pollution comes from the use of fossil fuels as the primary fuel in the power generating and transportation sectors. Diesel engines are employed in a variety of industries due to their dependability, durability, and efficiency. Enhancing the availability of oxygen within the combustion chamber is one technique for reducing exhaust gas emissions and optimizing diesel engine combustion. The aim of this study is to investigate how oxygen enrichment in diesel engines with diesel fuel and biodiesel affects their performance and emissions. The modeling in this research was carried out using AVL BOOST version 2011 software based on experimental results of the YANMAR TF 155 R-DI diesel engine at 1200 rpm with and without oxygen enrichment. Modeling was performed based on the baseline parameter of a diesel engine with gradual loads at 50%, 75%, and 100%. The oxygen concentration was increased to 30.6%, 37.8%, 45%, and 54% by mass. The results show an increase in the maximum heat release rate (HRR) and the mass fraction burned (MFB) up to 90% for both fuels. The peak heat release rate of biodiesel shifts around 6 J/degree and the brake-specific fuel consumption (BSFC) is up to 0.0035 kg/kWh higher than that of diesel fuel. When compared to diesel fuel, the thermal efficiency and BSFC of biodiesel usage are around 0.3% and 0.028 kg/kWh, respectively. NO_x emissions increase due to higher combustion temperatures and more oxygen availability. Biodiesel emits 50% less NO_x than diesel fuel, presumably due to a lower combustion temperature. As a result, while high-concentration oxygen enrichment improves combustion and lowers soot emissions, it raises NO_x emissions. Soot emissions were reduced as a result of the enhanced combustion process, while NO_x emissions rose due to higher combustion temperatures and increased oxygen availability.

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 cm3 using electronic control unit. Three different fuel system namely standard gasoline fuel system, commercially CNG conversion kit 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 4,800rpm. The results show that the maximum brake power at 25% throttle opening position of SI engine using commercially CNG conversion kit (19.00kW) is almost same with SI engine using proposed CNG conversion kit (19.68kW), while for 80% throttle opening position the maximum brake power of SI engine using proposed CNG conversion kit (38.67kW) is higher than commercially CNG conversion kit (34.29kW). 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