Using Camless Valvetrain for Air Hybrid Optimization
Using Camless Valvetrain for Air Hybrid Optimization
复制标题
使用无凸轮气门机构进行空气混合动力优化
DOI：
10.4271/2003-01-0038
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
M. Schechter
中科院分区：
文献类型：
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作者：
C. Tai;T. Tsao;M. Levin;Guido Barta;M. Schechter
空气混合动力发动机在制动过程中吸收车辆动能，以压缩空气的形式将其储存起来，并重新使用以辅助随后的车辆加速。与电动混合动力相比，空气混合动力不需要第二推进系统。这种方法提供了在燃料经济性方面的显著改进，而没有电动混合动力的复杂性。通过对一台4531 kg乘用车用的2.5L V6火花点火式发动机的建模结果，探讨了空气混合动力发动机的燃油经济性潜力。它描述了发动机的修改，各种工作模式的热力学和车辆驾驶循环模拟。空气混合动力模型预测了64%和12%的燃油经济性改善的基准车辆在城市和公路驾驶分别。这是可能的，而无需减少车辆重量以补偿额外的硬件，并且无需减少发动机排量。
The air-hybrid engine absorbs the vehicle kinetic energy during braking, puts it into storage in the form of compressed air, and reuses it to assist in subsequent vehicle acceleration. In contrast to electric hybrid, the air hybrid does not require a second propulsion system. This approach provides a significant improvement in fuel economy without the electric hybrid complexity. The paper explores the fuel economy potential of an air hybrid engine by presenting the modeling results of a 2.5L V6 spark-ignition engine equipped with an electrohydraulic camless valvetrain and used in a 4531 kg passenger car. It describes the engine modifications, thermodynamics of various operating modes and vehicle driving cycle simulation. The air hybrid modeling projected a 64% and 12% of fuel economy improvement over the baseline vehicle in city and highway driving respectively. This is possible without reducing the vehicle weight to compensate for additional hardware and without reducing engine displacement.