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Experimental Investigation on Space-dispersed Double-wall Jet Combustion System for DI Diesel Engine

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Defence Technology（防务技术） 2012年第1期8卷 1-10页

作者：郭鹏江高希彦 Institute of Internal Combustion Engine Dalian University of Technology

A space-dispersed double-wall jet combustion system was developed by adopting the wall-guiding spray method and the stratification theory.The experimental test was carried out to optimize the structural parameters of the diesel-engine combustion system,including chamber structure,swirl ratio of cylinder head,included angle of jet orifice,number and diameter of jet orifice,fuel injection pressure and timing.The effect of double-wall jet combustion system on combustion and engine performance was tested to obtain the best performance indexes,and the double-wall jet combustion system was compared to the prototype.The results show that NOx is reduced from 712 PPm to 487 PPm at 2 100 r/min,and from 593 PPm to 369 PPm at 3 000 r/min,which are reduced by 31.6% and 37.7%,respectively.The smoke intensity was reduced form 3.67 BSU to 2.1 BSU,and the oil consumption was reduced from 240.5 g/(kW·h) to 225.4 g/(kW·h),which was decreased by 6.3% at low speed.The pressure in the cylinder was obviously reduced from 115 bar to 108 bar,which was reduced by 6%.

关键词： power machinery engineering wall-guiding double-wall jet diesel engine combustion

Study on Effects of Diesel Engine Cooling System Parameters on Water Temperature

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Defence Technology（防务技术） 2011年第3期7卷 129-134页

作者：骆清国冯建涛刘国夫桂勇 Department of Mechanical engineering Academy of Armored Force engineering Department of Vehicular engineering Armored Force Technology Institute

A simulation model for a certain diesel engine cooling system is set up by using GT-COOL. The backwater temperature response in different operating conditions is simulated numerically. The effects of single or multiple system parameters on the water temperature are analyzed. The results show that, changing different single parameters, the time taken for the steady backwater temperature is different, but relatively short;and if multiple parameters are changed, the time will be longer. Referred to the thermal balance test, the simulation results are validated and provide a basis for the intelligent control of the cooling system.

关键词： power machinery engineering diesel engine cooling system transient response simulation

Test and Analysis for Spraying Ammonia in Diesel Engine

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Defence Technology（防务技术） 2011年第4期7卷 193-196页

作者：周华祥刘敬平贺力克陈方申奇志骆锐周正 Key Laboratory of Internal Combustion Engine Hunan University Automotive engineering Institute Hunan Industry Polytechnic Changsha Zoomlion Heavy Industry Science and Technology Development Co. Ltd

A certain amount of ammonia reducer were directly injected into the 4102BZLQ Diesel engine's combustion chamber when the combustion temperature decreases to 1573-1073K, NOx generated could be reduced to 1.11g/(kW·h). Based on PRF combustion mechanism, NO was tested by using the heavy-duty diesel engine test cycle of ESC thirteen conditions[1], the ammonia spray angle and amount were tested and optimized in different conditions. The test results show that the thermal efficiency of Diesel engine does not decrease while NO exhaust decreases.

关键词： power machinery engineering diesel engine direct injection of ammonium test analysis

Study on Effects of Oxydal on Diesel Engine Combustion

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Defence Technology（防务技术） 2010年第2期6卷 81-84页

作者：王宪成孙志新王益军马向平 Department of Mechanical engineering The Academy of Armored Forces Engineering Dalian University of Technology

Based on the analysis of the high temperature decomposition of oxydal(H2O2)and the combustion of diesel engine,the effects of H2O2 on the improvement of diesel combustion were studied.An oxydal spray system was designed to inject H2O2/water mixture into the manifold.The experiment was carried out on a 1135 diesel engine bench.The results show that H2O2 injection can make the curve of heat release rate move forward and decrease its peak value.The specific fuel consumption is decreased a little,while both NOx and PM emission are obviously reduced.

关键词： power machinery engineering diesel engine H2O2 combustion emission