VVT策略与高压缩比对直喷氢内燃机效率及动力性影响
The effects of variable valve timing strategy and com-pression ratio on attaining high efficiency and power performance in a DI hydrogen engine
随着对氢内燃机性能的要求越来越高，研究者采用了多种技术来达到预期目标。其中，米勒循环和高压缩比是提高热效率的两种有效方法。本研究研究了可变气门正时和压缩比对2.0 L 直喷氢内燃机性能的影响。结果表明，在2500 r/min中负荷时，优化后的气门正时将有效热效率（BTE）从38.8%提高到40.7%。提前IVO（进气门开启时刻）可以提高热效率，而推迟EVC（排气门关闭时刻）可以通过增加空气流量来提高动力性能。在研究IVO和EVC的影响后，采用了两…查看全部>>
With the higher demand for H2ICE power performance and thermal efficiency, numerous techniques are employed to attain higher desired targets. Among these techniques, The Miller cycle and high compression ratio are two effective ways to increase thermal effi-ciency among these methods. In this research, the effects of VVT and CR (compression ratio) on a 2.0 L DI H2ICE performance were studied. The results indicate the optimized VVT increases BTE (brake therma…查看全部>>
赖丰羽;孙柏刚;张诗蔚;王康达;罗庆贺;包凌志;
TK463
VVT compression ratio hydrogen internal combustion engines BTE high power performance
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