Wang Qingnian

Study of the electronic control strategy for the power train of hybrid electric vehicle

In this paper, the configuration of a parallel hybrid vehicle is introduced. Several operation modes of the engine and electric motor and different control strategies are analyzed. The results show that, with proper control strategies and selection of the drive-train parameters, the vehicle can satisfy the urban and highway driving with a small internal combustion engine, a small battery pack and a single gear transmission. Moreover, the vehicle does not need to charge the battery from the electricity network for keeping its battery SOC at a reasonable level.

Power Demand Analysis and Performance Estimation for Active-Combination Energy Storage System Used in Hybrid Electric Vehicles

Because of the drawbacks of ultracapacitors (UCs) and batteries, an active combination of UCs and Li-ion batteries has been proposed as an energy storage system (ESS) for hybrid electric vehicles (HEVs). Given the complexity of the active control system in an active-combination energy storage system (ACES), the performance match for the ACES used in an HEV is much more complex. In this paper, a widely applicable method to analyze the design process of the ESS used in HEVs is presented. The concept of the power-energy (PE) function is proposed to illustrate the power demand from the HEV and the energy and power capability of the ESS. This concept draws a clear contrast between demand and capability, particularly for the ACES. At the same time, the efficiency of the ACES could be estimated on the basis of this method. Furthermore, by using operating data from a hybrid electric bus in Changchun, China, power demand analysis and performance estimation are carried out for the optimal design of the ACES.

Parameter design for power train and performance simulation of electrical city bus

In this paper, based on a battery pure electric city bus, principle researches have been offered on the parameters matching of the power-train and main components. The vehicle system was designed integrated, and then simulation platform was developed and established. The dynamic and economy performance can be predicted based on the above work, results show that the designed pure electric city bus can meet the performance demands and validate rationality of the parameters matching.

Forward simulation model precision study for hybrid electric vehicle

Co-simulation model of forward hybrid electric vehicle (HEV) is established in this paper. And according to three aspects: traditional vehicle model (mechanism system model), electric system model and vehicle control strategy, the precision of the co-simulation model has been analyzed and checked by the revolving drum test bench of the First Automobile Workshop (FAW). The forward simulation model database is founded to perfect the forward model platform of HEV, which will be a developing foundation for the new vehicle design.

Study on mechanism of energy saving for double motor configuration hybrid electric vehicle

Compared with single-motor hybrid electric vehicle, the double-motor configuration has higher electric drive capability and driving efficiency, more powerful regulation and more energy-saving potential. Commencing from the structure, the energy-saving ideas and the advantage on energy-saving of the double-motor hybrid electric vehicles, this paper studies the energy-saving efficiency of the double-motor hybrid electric vehicle and its advantage on energy-saving and builds the forward Co-simulation model of HEV Theoretical study and simulation results show that the double-motor hybrid electric vehicle optimizes the engines operating points, improves the proportion of the time in the effective area for the engine and achieves excellent fuel economy.

Research on TTC200 Controller Hardware-in-the-Loop Simulation Base on dSPACE

In this article, hardware-in-the-loop simulation platform solutions have been proposed based on the characteristics and demands in development of electronic control unit in hybrid electric vehicles. And completed the development process of the controller hardware-in-the-loop simulation based on the hybrid electric excavator, focus on achieving the CAN communication between TTC200 controller and dSPACE. Finally, verify the feasibility of using the controller hardware-in-the-loop simulation platform technical solutions in the development process of the hybrid electric excavator on the basis of CAN communication experiments and co-simulation.

Study of Shifting without Driving Force Interrupt for Double Electric Motor HEV

For traditional gearbox, the engine power is cut off while shifting, which will interrupt the power of power-train, make velocity down, affect the acceleration of up gear and lower the vehicle dynamic. A double electric motor hybrid electric vehicle (HEV) that designed in a particular integrated power-train structure provides the necessary condition to deal with power interrupting while shifting. In this paper, theory and control method of shifting without driving force interrupt (SWDFI) are studied. The evaluation indicators for SWDFI are advanced and the model of double electric motor HEV is used to analyze the performance of the vehicle. Results show that question of shifting with driving force interrupt is solved, which improves the dynamic of HEV.

The Affect of Motor Efficiency on Regenerative Braking at Low-Speed Stage

An analysis of motor recovery efficiency characteristics in the low-speed was made. Based on this analysis, the control strategy was revised. Simulations were performed on the simulations platform based on Simulink-AMESim co-simulation. Simulation results indicated that the revised control strategy was helpful for increasing the efficiency of energy recovery.

Application of infrared thermometer in testing of temperature field for a rolling tire

The application of infrared (IR) measurement temperature principles and an M90B infrared thermometer in the testing of a temperature field for a rolling tire is mainly presented in this paper. The advantages of IR temperature measurement technique with no destruction of the measured temperature field, quick response and high sensibility are pointed out, which is suited to testing the temperature field for a rolling tire. The surface temperature distribution in a high rolling tire is gained by used M90 IR thermometer, the temperature rise of tire is relatively reflected by the measuring results.

The feasibility and superiority of super-capacitors on mild hybrid electric vehicle

Super-capacitor has the merits of high efficiency and long lifecycle, which could lead to the mitigating of burthen and prolonging of the lifecycle for batteries in mild hybrid electric vehicle (HEV). This paper proposed the parameters matching for the HEV using the ability of starting engine and motor synchronization. From the results of lifecycle cost and results of fuel economy simulation, the feasibility and the superiority of this application could be validated.