文档介绍：2 2 2
2 2 2 2
π 2
π 2
2
第 22 卷第 1 期中国公路学报 Vol. 22 No. 1
2009 年 1 月 China Journal of Highway and Transport J an. 2009
文章编号:1001 7372 (2009) 01 0116 04
车用汽油机燃油空气加热器试验
姚春德,杨广峰,倪培永,徐元利,冉勇
(天津大学内燃机燃烧学国家重点实验室,天津 300072)
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摘要:为减少车用汽油机低温冷起动排放并实现快速起动,采用低压喷射、高压点火的方案,研制了
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一种新型燃油空气加热器,并对其进行结构优化和性能试验研究。结果表明:喷油压力对排放影响
很大;喷油压力为 3. 5 × 105 ~4 × 105 Pa 时,热风出口温度相差不大;喷油压力为 4. 5 × 105 Pa 时,
燃烧 40 s 后,热风出口温度上升较快,60 s 时能达到 109 ℃;结构优化后,加热时间可控制在60 s以
内,但排气温度较高,燃烧室热负荷加大;采用该燃油空气加热器可实现快速有效的进气预热,为解
决发动机低温冷起动排放高和起动困难等问题,提供了一个有效的措施。
关键词:汽车工程;汽油机;试验研究;空气加热器;排放;喷油压力;出口温度
中图分类号:U464. 171 文献标志码:A
Tests of Air Heater Heated by Fuel for Gasoline Engine of Vehicle
YAO Chun de , YAN G Guang feng , N I Pei yong , XU Yuan li , RAN Yong
(State Key Laboratory of Engines , Tianjin University , Tianjin 300072 , China)
Abstract : A novel air heater heated by fuel for gasoline engine of vehicle which used low pressure
injection and high voltage ignition was developed to make engine s cold start quick and to reduce
HC and CO emission. The test s on it s performance were conducted after it s struct ure was
optimized. The result s show that injection pressure plays an important role in emission. Wit hin
t he range of 3. 5 × 105 Pa to 4 × 105 Pa for the injection pressure , t he outlet temperat ure difference
of hot air is not significant . When the injection pressur