[关键词]
[摘要]
分析了微混系统在48 V电池异常情况下整个车辆的工作状态,为了保证该情况下车辆仍能够像传统车一样运行,此时起动发电一体机(IBSG)不再处于常规的扭矩控制模式,而是处于电压控制模式。为了研究电机转速和12 V负载变化对电压控制模式影响,分别在电机台架和某1.0 L排量发动机的样车上进行测试验证。结果表明,当48 V电池继电器断开后,电机能够顺利进入电压控制模式且平稳运行。该运行模式保证了48 V电池异常后仍能使车辆继续运行,作为一种辅助驾驶模式,增强了车辆的系统安全性和鲁棒性。
[Key word]
[Abstract]
Vehicle operation when the 48 V battery is in abnormal status is analyzed. In order to keep the vehicle to be driven as a traditional car, the integrated belt-driven starter/generator (IBSG) is no longer working in torque control mode, but in voltage control mode in this condition. For studying the influences of IBSG speed change and 12 V load change on the voltage control mode, validation is performed both in bench test and in vehicle test with 1.0 L engine. Results show that IBSG can enter the voltage control mode smoothly. The voltage control mode ensures that the vehicle keeps running when the 48 V battery is not on the DC bus. As a kind of auxiliary driving mode, this control mode enhances the security and robustness of the vehicle.
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