轻型轿车发动机-变速器匹配性能仿真

本文比较了具有三种不同发动机（一种低速和一种高速自然吸气电火花点火、一种是废气涡轮增压点火）和二种不同型式变速器无级变速器（CVT）和自动变速器]的轻型轿车的燃油消耗。采用准静态传动循环仿真获得全部燃油消耗结果。详细阐述了补充模型。用换算已发表的数据获得所述发动机的效率线图。根据速度、转矩和速比来模拟变速器（CVT或齿轮传动）的效率。仿真显示所有这些概念都能实现低的燃油消耗，CVT表示了和自动变速器具有相同的油耗结果。CVT的理论上优点是其相对低的效率由使发动机在最佳燃油工作方面来补偿。

Performance Simulations of Engine-Gearbox Combinations for Lightweight Passenger Cars

This paper compares the fuel consumption of lightweight passenger cars with three different types of engine(one low speed and one high speed naturally aspirated spark ignited, one turbocharged compression ignited) and two different types of transmissioncontinuously variable transmission(CVT) and automated gear drive]. All fuel consumption results are obtained using a quasistatic driving cycle simulator. The implemented models are described in detail. The engines are represented through their efficiency maps, which are obtained by scaling published data. Efficiency of the transmission(CVT or gear drive) is modelled in dependence on speed, torque and gear ratio. The simulations show that low fuel consumption can be achieved with all those concepts. CVTs show similar results to automated gear drives. The CVT's theoretical advantage of operating the engine at its most fuel efficient points is compensated by the relatively low efficiency.