基于部件动态特性的城市混合动力SUV协调控制研究

A Study on Coordinated Control of Urban Hybrid Electric SUV Based on Dynamic Characteristics of Components

基于汽车部件特性和复杂工况,针对发动机动态响应性能多变和各子控制器报文周期不同带来的通信相对时延和控制相对滞后的问题,提出"发动机动态响应性能识别+发动机响应转矩预估+电动机同步补偿"的协调控制方法。实车测试结果表明,上述方法在发动机动态响应过程中,可使动力源总输出转矩与总需求转矩最大误差减小43%,从而有效满足整车动力性和平顺性的要求。

Based on component characteristics and complex driving conditions of vehicle, and aiming at the problem of relative delays in both communication and control, caused by the frequent change in engine dynamic response performance and the differenees of communication period between different sub-controllers, a coordinated control scheme is proposed for ＂the identification of engine dynamic response performance, the prediction of engine response torque and the synchronous compensation of motor＂. The resuhs of real vehicle test show that the scheme proposed can reduce the maximum difference of the total output torque of power source relative to total required torque by 43% in the process of engine dynamic response, hence effectively meeting the requirements of power performanee and ride comfort of vehicle.