综合发动机／无级变速器的动力系统的最佳工作点的设计和检测

摘要

采用带有综合发动机控制装置的无级变速器对驾驶员要求的传动功率选择发动机工作点许可很大的自由度。该适应点最最重要的是探索适当的发动机工作点。探索理想的瞬时发动机工作点的技术已经开发，采用它把有害物排放的加权重减至最小，采用人工神经网络预测燃油消耗。这种过程可以自动形成，采用动力传动系统的控制装置可以在整个工作时间内考虑变工况和环境条件允许回到最佳性能。采用废气涡轮增压和内冷直喷柴油机作为综合动力传动系中的原动机的结构已经实现。其结果表明该最佳装置发动机大范围变工况传动分别与排放和经济性有关。该优化规范十分紧密地结合于一个实际的动力传动系统的控制规划中。表明于手册指南中的试验工作已经证实该'装置'近似于动力传动系统控制对许可的车辆的排放和经济性性能特制适合特殊要求的装置。%The use of a continuously variable transmission(CVT) with an integrated engine controller al[Abstract]The use of a continuously variable transmission(CVT) with an integrated engine controller allows great freedom of choice of the engine operating point to deliver the power demanded by the driver.This flexibility places even greater emphasis on the requirement to locate an appropriate engine operating point. A technique has been developed that locates the ideal instantaneous engine operating point by minimizing a simple weighted sum of exhaust emissions and fuel consumption predicted by an artificia neural network. This process may be configured automatically to take account of varying operating or environmental conditions, allowing the optimum performance to be returned by the powertrain controller at all times.The structure has been implemented for a turbocharged and intercooled direct injection diesel engine used as the prime mover in an integrated powertrain. Results are presented that demonstrate the use of the optimizer to derive widely varying operating schedules for the engine, each with associated emissions and economy implications. The optimizer code is sufficiently compact to be incorporated into a practical powertrain control strategy. Experimental work presented in a companion paper has confirmed that this 'systems' approach to powertrain control allows the emissions and economy performance of the vehicle to be tailored to suit the particular requirements of the installation.