车用发动机
車用髮動機
차용발동궤
2014年
2期
46-50
,共5页
范巍%吴健%李云龙%张少哲%裴毅强
範巍%吳健%李雲龍%張少哲%裴毅彊
범외%오건%리운룡%장소철%배의강
米勒循环%可变配气相位%泵气损失%膨胀比%燃油经济性
米勒循環%可變配氣相位%泵氣損失%膨脹比%燃油經濟性
미륵순배%가변배기상위%빙기손실%팽창비%연유경제성
Miller cycle%variable valve timing (VVT)%pumping loss%expansion ratio%fuel economy
通过更换汽油机的进气凸轮轴和活塞延长了进气持续期、提高了压缩比，并结合可变配气相位技术进行了米勒循环发动机对燃油经济性影响的试验研究。研究结果表明，米勒循环发动机提高了进气压力、增大了膨胀比，有效降低了泵气损失。2000 r／min负荷特性下米勒循环发动机进气压力平均增加12．7％，泵气损失降低53．3％；能量的有效利用程度高，发动机的燃油消耗率有明显的降低，2000 r／min工况燃油消耗率平均降幅为6．8％。
通過更換汽油機的進氣凸輪軸和活塞延長瞭進氣持續期、提高瞭壓縮比，併結閤可變配氣相位技術進行瞭米勒循環髮動機對燃油經濟性影響的試驗研究。研究結果錶明，米勒循環髮動機提高瞭進氣壓力、增大瞭膨脹比，有效降低瞭泵氣損失。2000 r／min負荷特性下米勒循環髮動機進氣壓力平均增加12．7％，泵氣損失降低53．3％；能量的有效利用程度高，髮動機的燃油消耗率有明顯的降低，2000 r／min工況燃油消耗率平均降幅為6．8％。
통과경환기유궤적진기철륜축화활새연장료진기지속기、제고료압축비，병결합가변배기상위기술진행료미륵순배발동궤대연유경제성영향적시험연구。연구결과표명，미륵순배발동궤제고료진기압력、증대료팽창비，유효강저료빙기손실。2000 r／min부하특성하미륵순배발동궤진기압력평균증가12．7％，빙기손실강저53．3％；능량적유효이용정도고，발동궤적연유소모솔유명현적강저，2000 r／min공황연유소모솔평균강폭위6．8％。
The intake duration was extended and the compression ratio was increased by changing the intake camshaft and pis‐ton of gasoline engine .Combining with the VVT technology ,the fuel economy of Miller cycle engine was researched by the ex‐periment .The results showed that Miller cycle engine could increase the intake pressure and expansion ratio and reduce the pumping loss effectively .In partial load of 2 000 r/min ,the intake pressure increased by 12 .7% on average and the pumping loss reduced by 53 .3% .The degree of effective energy utilization improved and the specific fuel consumption decreased signifi‐cantly ,which decreased by 6 .8% on average in 2 000 r/min .
