徐成耀,路平,宫向,滕勤
天大龙成节能环保科技有限公司;合肥工业大学机械与汽车工程学院;
摘要：柴油公交车在起步和急加速时,由于发动机转速上升缓慢以及增压器的响应滞后使得进气量跟不上供油量的变化,造成烟度排放增加。为了解决这一问题,本文研究了一种用于车载的压缩空气补气系统。在发动机怠速及减速过程中,辅助空气压缩机向高压储气罐充气;当发动机加速时,由电控单元控制的电磁阀将低压气罐中的压缩空气直接喷入进气管,增加气缸充量。车载实验结果表明,该系统可满足实际应用的要求,显著减少了柴油机加速时的烟度排放。
关键词： 柴油机;压缩空气补气系统;实验研究
Abstract：When public traffic bus equipped with the
turbocharged diesel is going to start or accelerate,exhaust emission increases
due to low engine speed and delayed turbocharger response.In order to solve
this problem,a compressed air supply system is developed.While the engine speed
is idle or reduces,the auxiliary air compressor is used to charge air into the
gas-tank with higher pressure.When the engine is accelerated,the compressed air
in the gas-tank with lower pressure is injected directly into the intake pipe
through a solenoid valve operated by an electronically controlled unit so that
the cylinder charge increases.The in-vehicle experiment results show that
practical application is much satisfactory due to usage of this system and
smoke emission is lower while the diesel engine is accelerating.
Keyword：Diesel Engine;Compressed Air Supplying
System;Experimental Study
参考文献:
[1]D.E Winterbone,R.S Benson.Transient
response of turbocharged diesel engines(Part 1 and Part 2)[R].SAE
Paper,770122,1977.
[2]杨策,马朝臣,沈宏继.大型柴油机可变几何涡轮增压器的研制及试验研究[J].内燃机学报,2002,20(6):551-554.
[3]张汝坤.双叶片整体式轴向移动可变喷嘴增压器的研究[J].云南农业大学学报,1999,14(1):66-71.
[4]陆家祥等.舌形挡板变截面涡轮(VGT)的研究[J].内燃机学报,1994(2):145-150.
[5]J.D Ledger,R.S Benson,H.Furukawa,et
al,Improve-ment in Transient Performance of a Turbocharged Diesel En-gine By
Air Injection Into the Compressor[R].SAE Paper,730665,1973.
[6]H.Harndorf.向涡轮增压器补充喷气以改善增压柴油机的瞬态响应[J].国外内燃机,1996(2):53-63.
[7]徐广兰.电动增压器电控系统的设计及试验研究[D].天津:天津大学,2010.
[8]张雨松,尹琪,邬静川.用补气改善公交柴油车急加速烟度研究[J].内燃机工程,2002,23(1):53-55.
[9]戴澍凯.公交车用增压柴油机的补气研究[D].湖北:武汉理工大学,2010.
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