燃烧科学与技术
燃燒科學與技術
연소과학여기술
JOURNAL OF COMBUSTION SCIENCE AND TECHNOLOGY
2013年
4期
311-316
,共6页
氢气%氢内燃机%循环变动%平均指示压力
氫氣%氫內燃機%循環變動%平均指示壓力
경기%경내연궤%순배변동%평균지시압력
hydrogen%hydrogen internal combustion engine%cycle variation%indicated mean effective pressure
为探索氢内燃机的循环变动特性,基于一台2.0,L 进气道喷射式氢内燃机,开展了氢内燃机循环变动特性及影响因素的试验研究.试验结果表明:平均指示压力的循环变动系数是评价氢内燃机循环变动特性的理想特征参数;怠速转速越高,氢内燃机的循环变动越小;随混合气浓度提高,氢内燃机循环变动显著减小,点火提前角对循环变动的影响变弱,同时循环变动系数最小时对应的点火提前角逐渐趋近压缩上止点;节气门开度在0~20%范围时,随节气门开度增大循环变动显著减小;在怠速工况下,进气过程中喷氢会导致氢内燃机循环变动增加.
為探索氫內燃機的循環變動特性,基于一檯2.0,L 進氣道噴射式氫內燃機,開展瞭氫內燃機循環變動特性及影響因素的試驗研究.試驗結果錶明:平均指示壓力的循環變動繫數是評價氫內燃機循環變動特性的理想特徵參數;怠速轉速越高,氫內燃機的循環變動越小;隨混閤氣濃度提高,氫內燃機循環變動顯著減小,點火提前角對循環變動的影響變弱,同時循環變動繫數最小時對應的點火提前角逐漸趨近壓縮上止點;節氣門開度在0~20%範圍時,隨節氣門開度增大循環變動顯著減小;在怠速工況下,進氣過程中噴氫會導緻氫內燃機循環變動增加.
위탐색경내연궤적순배변동특성,기우일태2.0,L 진기도분사식경내연궤,개전료경내연궤순배변동특성급영향인소적시험연구.시험결과표명:평균지시압력적순배변동계수시평개경내연궤순배변동특성적이상특정삼수;태속전속월고,경내연궤적순배변동월소;수혼합기농도제고,경내연궤순배변동현저감소,점화제전각대순배변동적영향변약,동시순배변동계수최소시대응적점화제전각축점추근압축상지점;절기문개도재0~20%범위시,수절기문개도증대순배변동현저감소;재태속공황하,진기과정중분경회도치경내연궤순배변동증가.
The cycle variation characteristics of a 2.0,L port fuel injection hydrogen internal combustion engine(PFI-HICE)have been extensively investigated. The results show that the covariance of indicated mean effective pressure Cimep is the best parameter for evaluating the cycle variations in the PFI-HICE. Cimep decreases with the increase of idle speed or fuel-air ratio. The effect of ignition advance angle on Cimep diminishes as fuel-air ratio increases. The ignition advance angles that correspond to the minimum Cimep of the PFI-HICE decrease as fuel-air ratio increases. The Cimep of the PFI-HICE rapidly decreases as throttle increases when the throttle is less than 20%. The Cimep increases when hy-drogen is injected in intake periods under idle conditions. These results indicate that the study on Cimep improves the stability of PFI-HICEs.