摘要
对并联液压混合动力车辆的燃油经济性的优化提出了液压节能系统的等效理论,初步研究了等效理论运用于液压混合动力车辆的理论基础,这种方法在满足车辆所需达到性能的前提下,提高了液压混合动力系统的整体效率。并且基于混合动力系统在最佳运行状态下的数学曲线(HOOL)和在装有传统燃油发动机车辆(ICE)的条件下,根据具体燃油消耗量所获得的最佳运行状态下的数学曲线(HOOL)。在HOOL曲线中,包含了控制变量的最佳拟合,CVT的传动比,二次元件扭矩和燃油发动机熄火所对应的车辆速度,液压蓄能器的充能状态及所需要的功率。并采用了液压混合动力试验台架进行试验验证,试验结果表明液压辅助动力系统等效理论的正确性和创新性,验证了本理论优化方法的有效性。
A new fuel economy optimization method for parallel HHV with the theory of equivalent model is proposed in this paper. Preliminary studies the equivalent theory to hydraulic hybrid vehicle theoretical basis, this kind of method in meet the desired performance of vehicle ; improve the overall efficiency to the premise of hydraulic hybrid system. The method maximizes overall system efficiency while meeting desired performances. Hence, hybrid optimal operation line （HOOL） is derived based on ESFC as optimal operation line （HOOL） is found based on specific fuel consumption （SFC） in a conventional internal combustion engine （ICE） vehicle with CVT. From HOOL, optimal combinations of control variables, CVT gear ratio, Secondary Component torque and engine throttle, are obtained versus vehicle velocity, state of charge and required power. A Hydraulic hybrid test-bed study with the proposed optimization method is performed to prove its validity.
出处
《机械设计与研究》
CSCD
北大核心
2015年第4期168-172,共5页
Machine Design And Research
