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Wuxi, China

Wei C.,Jiangsu University | Wang Z.,Jiangsu University | Ye F.,Jiangsu University | Tang T.,Wuxi Diesel Works | Huang C.,Wuxi Diesel Works
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

The main influencing factors of starting system under low temperature were analyzed, while maximum output power of the ISG motor was determined. According to starting resistance torque, minimum start-up speed, electrical operating characteristics, electric transmission coefficient and thermal effects, the influence of plate structure on battery capacity was also reviewed. The match relationship among starting resistance torque, ISG motor power and storage battery capacitance was summarized, and the changes of starting resistance torque along with ambient temperature and starting speed has been measured. The experiment result shows that as far as the environment temperature decreases by 5°C, starting resistance torque increases by 3-5N·m at above 200r/min, keeping speed constant, starting resistance torque increases by 4~11N·m with every enhanced 50r/min. The first fire speed of ISG diesel engine at -25°C is increased, which is up to more than 350r/min.The starting time is shorter than original diesel engine, and fluctuations in speed is smaller.

Wang Z.,Jiangsu University | Wei C.,Jiangsu University | Wang Y.,Jiangsu University | Huang C.,Wuxi Diesel Works | Qian H.,Wuxi Diesel Works
Qiche Gongcheng/Automotive Engineering | Year: 2010

Aiming at the characteristics of various components and system design objective of the vehicle based on integrated starter/alternator (ISA) technique, the mathematical models for diesel engine, ISA motor and complete vehicle are created. On the premise of achieved optimal matching between diesel engine, ISA motor, battery and driving system, a control strategy is proposed with battery SOC, vehicle speed, engine power and speed, as well as fuel economy as main parameters. Using Matlab/Simulink software and based on the control strategy, a power performance simulation is conducted at starting, power assisting and battery charging conditions, and a vehicle simulation test is also performed with CYC_ECE_EUDC driving cycle. The results show that the control strategy proposed can meet various requirements of ISA vehicle, including speedy starting, torque compensation at low speed, offering auxiliary power at acceleration mode and constant charging power, so realizing the integration of starting, power assisting and electricity generation etc functions.

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