Ziliang Zhao

Development of B70HEV and B50PHEV Based on Faw-TMH Powertrain

With the targets of low carbon emissions and optimization of energy consumption, FAW developed the Twin Motor Hybrid system (FAW-TMH™), which has obtained patents in both China and the United States. The system includes the hybrid dedicated engine, a traction motor (TM), a clutch, an automatic manual transmission (AMT), a BSG, a new battery system and other key assemblies. This hybrid powertrain can be extended to plug-in system easily. This configuration has all the full hybrid functions such as Start-Stop, pure electric driving and regenerative brake. As the application of this system, FAW has developed B70HEV and B50PHEV. In NEDC, B70HEV can achieve a reduction of 35.2 % in fuel consumption, which can meet the European “130 g CO2/km” emissions regulations in 2012. B50PHEV can achieve a reduction of more than 60 % in fuel consumption in NEDC.

Study on New Concept Powertrain for Range-Extended Electric Vehicles

Range Extended Electric Vehicle (REEV) can extend driving range of EV by engine when battery SOC reaches its lower limit. But usual REEV powertrain is serial, fuel consumption of which is high in high speed driving condition when vehicle works in Range Extended mode. With the problem, a new concept powertrain for REEV is presented in this paper. It has better driving condition adaption, as it can work in serial or in parallel according to driving condition. Firstly, the configuration of new Range-Extended Electric Vehicle powertrain is proposed, which contains engine, BSG motor, clutch, traction motor and two-speed DCT. In Range Extended mode, it can work in serial or parallel. Two-speed DCT can adjust operating points of engine and traction motor. In addition, engine, BSG motor and traction motor can be downsized due to the use of clutch and DCT. Secondly, component parameters are designed according to vehicle requirements. Thirdly, control strategy of REEV based on the new concept powertrain is designed. Moreover, detail design for an A0 car is presented, and advantages of the new concept powertrain are evaluated by simulation. Evaluated by simulation, the new concept powertrain can meet requirements of Range Extended Electric Vehicle, and fuel economy of new concept powertrain is good in various driving cycles when vehicle works in Range Extended mode.

Approach of Gasoline Hybrid Technology for “95G CO2/KM” Emissions Regulation

In order to meet the increasingly strict regulations of CO2 emissions limits, gasoline hybrid technology for “95 g CO2/km” emissions regulation was analyzed in this paper. Study of energy-efficient technology shows that full hybrid technology, combined with lower rolling resistance and reducing drag technology is still difficult to achieve “95 g CO2/km” emissions target. Plug-in hybrid technology is a better way to achieve this target. In this paper, aimed at “95 g CO2/km” emissions target, appropriate motor and battery were chosen, the control strategy under CD mode was studied to develop a more reasonable powertrain system, and finally the purchase cost and daily using cost of vehicle were analyzed.