吉林大学学报(工学版) ›› 2025, Vol. 55 ›› Issue (7): 2162-2171.doi: 10.13229/j.cnki.jdxbgxb.20231121

• 车辆工程·机械工程 • 上一篇    

气门正时对直喷氢内燃机性能影响的数值模拟

王忠恕1(),阿帝雅1,杜耀东1(),李潜2,3,汤雪林2,邓伟2,解方喜1   

  1. 1.吉林大学 汽车工程学院，长春 130022
    2.重庆长安汽车股份有限公司 动力研究院，重庆 401133
    3.重庆大学 机械与运载工程学院，重庆 400030
  • 收稿日期:2023-10-18 出版日期:2025-07-01 发布日期:2025-09-12
  • 通讯作者: 杜耀东 E-mail:wangzhongshu@jlu.edu.cn;duyd2021@jlu.edu.cn
  • 作者简介:王忠恕（1977-），男，教授，博士.研究方向：气体机高效清洁燃烧技术. E-mail： wangzhongshu@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(52372383);吉林省科技发展计划项目(20220508015RC)

Numerical simulation of effect of valve timing on performance of in-cylinder direct-injection hydrogen internal combustion engine

Zhong-shu WANG1(),Di-ya A1,Yao-dong DU1(),Qian LI2,3,Xue-lin TANG2,Wei DENG2,Fang-xi XIE1   

  1. 1.College of Automotive Engineering，Jilin University，Changchun 130022，China
    2.Powertrain R&D Institute，Chongqing Changan Automobile Co. ，Ltd. ，Chongqing 401133，China
    3.College of Mechanical and Vehicle Engineering，Chonqqing University，Chongqing 400030，China
  • Received:2023-10-18 Online:2025-07-01 Published:2025-09-12
  • Contact: Yao-dong DU E-mail:wangzhongshu@jlu.edu.cn;duyd2021@jlu.edu.cn

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摘要：

以一台1.5 T VVT缸内直喷氢内燃机为原型机搭建一维GT-POWER模型，研究进排气门正时变化对发动机的换气过程、动力性及经济性的影响。发动机转速为2 700 r/min，外特性工况时保持氢气量一致，采用稀薄燃烧模式，进气门正时提前、排气门正时推迟策略可使进气质量流量增大，有效热效率由40.8%提高到41.07%，有效燃气消耗率下降。发动机转速为5 500 r/min，外特性工况时保持过量空气系数一致，进排气门同时推迟策略可使缸内气体质量增多，泵气损失降低，功率提高12.7%，有效燃气消耗率小幅降低。其中，排气门正时变化对直喷氢内燃机动力性及经济性的影响较进气门更为显著。

关键词: 动力工程及工程热物理, 氢内燃机, 缸内直喷, 气门正时

Abstract:

A one-dimensional GT-POWER model was built with a 1.5 T VVT in-cylinder direct-injection hydrogen internal combustion engine， and the effects of inlet and exhaust valve timing changes on the engine's air exchange process， power performance and economy were studied. When the engine speed is 2 700 r/min， the lean combustion strategy is adopted to keep the pulse width of hydrogen injection consistent under the full-load condition， and the inlet valve timing is advanced and the exhaust valve timing is delayed， the intake mass flow rate is increased， the effective thermal efficiency is increased from 40.8% to 41.07%， and the effective gas consumption is decreased. The engine speed is 5 500 r/min， the excess air coefficient is the same under the full-load condition， the inlet and exhaust valve delay strategy can increase the gas mass in the cylinder， reduce the pump gas loss， increase the power by 12.7% and slightly reduce the break specific gas consumption. The influence of exhaust valve timing on the power performance and economy of in-cylinder direct-injection hydrogen combustion engine is more significant than that of intake valve.

Key words: power engineering and engineering thermophysics, hydrogen internal combustion engine, in-cylinder direct injection, valve timing

中图分类号: 

  • TK431

表1

试验发动机技术参数"

发动机参数数值
排量/L1.494
缸径×行程/（mm×mm）73.5×88
型式直列4缸4冲程4气门 水冷
压缩比13∶1
进气型式涡轮增压
最大净功率/kW105
最大净扭矩/（N·m）230

图1

模拟平台搭建"

图2

模型验证"

图3

气门升程曲线"

表 2

模拟方案"

转速/（r·min-1）喷氢脉宽/ms过量空气系数进气门正时/°CA排气门正时/°CA
2 7001.791.72~1.9215，220，225，230，235，240，245118
2 7001.791.48~1.98230103，108，113，118，123，128，133
5 5002.12~2.721.55215，220，225，230，235，240，245118
55 001.88~2.881.55230103，108，113，118，123，128，133

图4

气门正时对进气质量流量的影响"

图5

气门正时对缸内气体质量的影响"

图6

气门重叠角对缸内残余废气系数的影响"

图7

气门正时对缸内最大压力及最大燃烧温度的影响"

图8

气门正时对有效热效率和有效燃气消耗率的影响"

图9

气门正时对过量空气系数和扭矩的影响"

图10

气门正时对进气质量流量的影响"

图11

气门正时对缸内气体质量的影响"

图12

气门正时对缸内最大压力及最大燃烧温度的影响"

图 13

气门正时对动力性及经济性的影响"

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