本文關(guān)鍵詞： Atkinson循環(huán) 氣門型線 進氣歧管 燃燒室形式　出處：《天津大學(xué)學(xué)報(自然科學(xué)與工程技術(shù)版)》2016年11期 　論文類型：期刊論文

【摘要】：運用GT-Power建立發(fā)動機計算模型,研究氣門型線、進氣歧管形式對1.5,L Atkinson循環(huán)發(fā)動機經(jīng)濟性和動力性的影響;運用CFD軟件AVL-Fire對不同燃燒室形式下的燃燒過程進行模擬研究,并通過臺架試驗數(shù)據(jù)進行驗證.研究結(jié)果表明:最佳進氣持續(xù)期為240°,CA,氣門最大升程為8,mm.此時,長度為300,mm的側(cè)面進氣的進氣歧管與改進的燃燒室匹配,在研究轉(zhuǎn)速范圍內(nèi),最低油耗比原機降低了7.23~8.31,g/(k W·h),且低油耗區(qū)范圍明顯擴大;長度為100,mm的中間進氣形式歧管的最低油耗比原機降低了6.21~9.19,g/(k W·h),低油耗區(qū)范圍也有明顯擴大;兩種形式的進氣歧管皆可以滿足降低油耗的需求,需根據(jù)發(fā)動機實際布置情況進行選擇.
[Abstract]:The engine calculation model was established by GT-Power to study the effect of valve line and intake manifold on the economy and power performance of 1.5 L Atkinson cycle engine. The combustion process in different combustion chamber forms is simulated by CFD software AVL-Fire and verified by bench test data. The results show that the optimal intake air duration is 240 擄. CA, the maximum lift of the valve is 8 mm. At this time, the side intake manifold of 300 mm in length matches the improved combustion chamber and is within the range of the studied rotational speed. The lowest oil consumption is 7.23 ~ 8.31 g / h 路h ~ (-1), and the area of low fuel consumption is enlarged obviously. The minimum oil consumption of the middle intake manifold with a length of 100 mm is 6.21 ~ 9.19 g / g 路h ~ (-1) lower than that of the original one, and the range of the low fuel consumption area is also enlarged obviously. Both types of intake manifold can meet the demand of reducing fuel consumption and need to be selected according to the actual arrangement of the engine.
【作者單位】： 天津大學(xué)內(nèi)燃機研究所;天津大學(xué)內(nèi)燃機燃燒學(xué)國家重點實驗室;
【基金】：國家科技支撐計劃資助項目(2014BAG10B01)
【分類號】：U464.134.4
【正文快照】： 傳統(tǒng)汽油機利用節(jié)氣門控制負荷,在城市路況下進氣節(jié)流損失嚴重,泵氣損失較大,導(dǎo)致油耗增加[1-2].利用進氣門晚關(guān)技術(shù)實現(xiàn)Atkinson循環(huán)并控制發(fā)動負荷,在節(jié)氣門全開狀態(tài)下即可達到所需負荷的控制,減少了泵氣損失和壓縮功,提高發(fā)動機熱效率,進而降低燃油消耗率[3-6].由于進氣門

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