电控液压可变气门控制系统的能量回收系统（英文）

摘要

The electro-hydraulic variable valve actuation (VVA) system ensures variable valve timing and lift, and expends a lot of energy. To improve the energy efifciency of VVA, this paper introduces an energy recovery system (ERS). An accumulator was used to store the surplus, otherwise wasted energy of the discharged oil from the cylinder, so the accumulated pressure of this accumulator was guaranteed the lower energy consumption of the main pump. The valve timing and lift was optimized in GT-power model to achieve the minimum Basic Speciifc Fuel Consumption (BSFC) of the engine with this VVA system. The results show that the addition of ERS adjusts the timing and lift of the valve lfexibly and decreases the VVA energy consumption with a 7% - 11% of engine power increasing and a 6% - 9% of economy increasing.%电控液压可变气门控制( V VA)系统能够确保气门正时与升程可变，但是系统却消耗大量能量。为了提升它的节能性，本论文提出了一种带有能量回收系统(ERS)的VVA系统。该系统利用一个蓄能器来储存液压缸卸油浪费的能量，蓄能器积累的油压能确保更低主泵能耗。通过在GT-power模型中优化气门正时与升程，来确保带有VVA系统的发动机的燃油消耗率(BSFC)达到最低。结果表明：增加能量回收系统，使气门正时和升程柔性可调，并减少VVA的能量消耗，发动机动力性提升7%~11%，燃油经济性提升6%~9%。