Atkinson循环发动机进气系统匹配优化模拟与试验

发布时间：2018-01-20 01:00

本文关键词： Atkinson循环气门型线进气歧管燃烧室形式　出处：《天津大学学报(自然科学与工程技术版)》2016年11期 　论文类型：期刊论文

【摘要】：运用GT-Power建立发动机计算模型,研究气门型线、进气歧管形式对1.5,L Atkinson循环发动机经济性和动力性的影响;运用CFD软件AVL-Fire对不同燃烧室形式下的燃烧过程进行模拟研究,并通过台架试验数据进行验证.研究结果表明:最佳进气持续期为240°,CA,气门最大升程为8,mm.此时,长度为300,mm的侧面进气的进气歧管与改进的燃烧室匹配,在研究转速范围内,最低油耗比原机降低了7.23~8.31,g/(k W·h),且低油耗区范围明显扩大;长度为100,mm的中间进气形式歧管的最低油耗比原机降低了6.21~9.19,g/(k W·h),低油耗区范围也有明显扩大;两种形式的进气歧管皆可以满足降低油耗的需求,需根据发动机实际布置情况进行选择.
[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 掳. 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.
【作者单位】：天津大学内燃机研究所;天津大学内燃机燃烧学国家重点实验室;
【基金】：国家科技支撑计划资助项目(2014BAG10B01)
【分类号】：U464.134.4
【正文快照】： 传统汽油机利用节气门控制负荷,在城市路况下进气节流损失严重,泵气损失较大,导致油耗增加[1-2].利用进气门晚关技术实现Atkinson循环并控制发动负荷,在节气门全开状态下即可达到所需负荷的控制,减少了泵气损失和压缩功,提高发动机热效率,进而降低燃油消耗率[3-6].由于进气门

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