Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Transactions of the Chinese Society of Agricultural Engineering》 2015-12
Add to Favorite Get Latest Update

Influence of changed fuel injection pulse width and pressure on discharge coefficient in diesel engine

Du Huiyong;Zhang Ziwei;Liu Jianxin;Li Min;Wang Zhancheng;Xu Bin;Vehicle & Transportation Engineering Institute,Henan University of Science and Technology;  
In order to obtain the law of the impact of fuel injection pulse width and injection pressure change on the discharge coefficient and understand the causes of this law,this article designed and completed the experiment with commonly used fuel injection pulse width(1 000-2 500 μs) and large scope of injection pressure(40-180 MPa).The momentum method was adopted to measure the fuel injection law in experiment,and the fuel injection quantity in different periods of injection process could be figured out at the same time,with the purpose of calculating the maximum discharge coefficient which corresponded to the duration of needle valve open completely,and the average discharge coefficient in the fuel injection duration in all conditions.The two parameters were used to explore the law of their own variation when the fuel injection pulse width and the injection pressure changed and to find their relationship and difference.With the purpose of obtaining more general results,the ratio of the duration of valve open fully and the injection duration was introduced as a dimensionless parameter τ,through which we could easily know the deviation value of discharge coefficient according to the curve of the mean discharge coefficient deviating from the maximum discharge coefficient.A lot of research has been made on discharge coefficient change in terms of external cause at home and abroad.But most of these studies were based on fluid simulation,or through Nurick simplified model to analyze,or just discussed the impacts of some physical parameters such as nozzle geometry,needle valve lift,Reynolds number and surface roughness inside the nozzle,fuel density and viscosity on discharge coefficient.Just discussing how much effect the conditions would have on the discharge coefficient was not enough,we must study why.This paper introduced the theory of flow loss analysis of nozzle discharge coefficient.Changes of discharge coefficient with the fuel injection pulse width and injection pressure were obtained by experiment.Then we could explain those changes in the law with the method based on the theory of flow loss,which was different from the conventional research methods of discharge coefficient analysis,for our method not only focused attention on how much impact the change of the fuel injection pulse width and injection pressure will cause on the discharge coefficient,but also attempted to explain why.The method confirmed the influence factors of discharge coefficient,namely the local loss and equivalent linear loss.The local loss was associated with shrunk stream and cavitation,and the equivalent linear loss in the direct ratio to a power of-0.25 of flow velocity.The experimental results showed that: When the injection pressure was over 160 MPa and the increment of injection pulse width was 500 μs,the variation of the average discharge coefficient was no more than 5.9%; when the injection duration was greater than 1.78 ms,the injection pulse width had no influence on the maximum discharge coefficient in principle; when the ratio of the duration of valve open fully and the injection duration was about 0.85,the difference rate between the average discharge coefficient and maximum flow coefficient under the condition of injection pressure below 180 MPa was less than 7.5%; when the injection pressure was greater than 140 MPa,the discharge coefficient tended to be stable and was lower than the value corresponding to injection pressure less than 90 MPa.The method that analyzes the effect of fuel injection pulse width and injection pressure on the discharge coefficient from the angle of flow loss can preferably explain the experimental results,which proves that the method is relatively accurate.This paper can provide a reference for the optimization of injection and the further study of discharge coefficient.
【Fund】: 河南省国际合作项目(144300510039)
【CateGory Index】: TK421.42
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
【Citations】
Chinese Journal Full-text Database 10 Hits
1 WANG Qian,BAI Jin,HE Zhi-xia,MU Qing-mu (School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China);Cavitating Flow Characteristics in Diesel Nozzle[J];Vehicle Engine;2010-03
2 LU Jin-Li WANG Yan XU Zhong-Lin WANG Shu-Juan HAO Ying-Li (School of Energy and Environment,Southeast University,Nanjing 210096,China);EXPERIMENTAL INVESTIGATION OF FLOW CHARACTERISTICS OF LIQUID IN MINI-TUBES[J];Journal of Engineering Thermophysics;2009-12
3 DU Hui-yong,GUO Chuan,LIU Song,LIU Jian-xin,WANG Zhan-cheng,XU Bin(School of Vehicle & Motive Power Engineering,Henan University of Science and Technology,Luoyang 471003,China);Accurate Measurement of Nozzle Flow Coefficient[J];Vehicle Engine;2013-01
4 SHAO Li-min1,2,CHANG Han-bao1,ZHOU Jia-dong1,3,JIN Hua-jun3,SHI Wen-jie3(1.College of Naval Architecture and Power,Naval University of Engineering,Wuhan 430033,China;2.Shanghai Navy Equipment Repair Monitor Section,Shanghai 200136,China;3.Navy 91860 Unit of PLA,Shanghai 200433,China);Study on Influence of Nozzle Geometric Parameters on Injection Characteristic of Multi-Hole Injector[J];Chinese Internal Combustion Engine Engineering;2010-06
5 WANG Xiang,SU Wan-hua(State Key Laboratory of Engines,Tianjin University,Tianjin 300072,China);The Influence of Cavitation Processes on the Internal Flow Characteristics of Diesel Injection Nozzles[J];Transactions of CSICE;2007-06
6 Li Dongmin1, Zhong Peisi1, Wang Huiming2, Xia Shangfei2 (1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266510, China; 2. College of Mechanical and Electronic Engineering, Shandong Agricultural University, Tai’an 271018, China);Digital fuel measurement of fuel injection pump test bench based on needle valve lift[J];Transactions of the Chinese Society of Agricultural Engineering;2008-08
7 Liu Jianxin Du Huiyong Li Min Zhao Zhihe (Luoyang Institute of Technology);A Study on Quasi-dynamic Measurement of Flow Coefficient of a Hole-type Nozzle[J];Transactions of The Chinese Society of Agricultural Machinery;2002-02
8 Cui Huifeng;Luo Fuqiang;Wang Ziyu;Dong Shaofeng;School of Automobile and Traffic Engineering,Jiangsu University;China North Engine Research Institute;;Simulation analysis of flow characteristics of Jatropha curcas oil in diesel injector[J];Transactions of the Chinese Society of Agricultural Engineering;2013-24
9 Cui Huifeng;Luo Fuqiang;Dong Shaofeng;Liang Yu;Zhou Liying;School of Automobile and Traffic Engineering,Jiangsu University;School of Mechanical Engineering,Guiyang University;;Flow Characteristics in Diesel Nozzle with Convergent Conical Orifice[J];Transactions of the Chinese Society for Agricultural Machinery;2013-11
10 YU Jian-da,MIAO Xue-long,YANG Wei,ZHANG Yong-yan (Wuxi Fuel Injection Equipment Research Institue,Wuxi 214063,China);Study on Effected Factor and Injection Characteristics of Nozzle Flow Coefficient[J];Modern Vehicle Power;2007-03
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 Guo Yu (Dept. of Metallurgy);The Numerical Method of Navier-Stokes Equation[J];JOURNAL OF ANSHAN INSTITUTE OF IRON AND STEEL TECHNOLOGY;1997-03
2 LIU Jing(School of Civil and Transportation,Anshan University of Science and Technology,Anshan 114044,China);Numerical simulation of turbulence in mixing bend pipe[J];Journal of Anshan University of Science and Technology;2006-04
3 He Yongling Ding Chuan(School of Transportation Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China);Method of modeling transient two-phase flow in injector[J];Journal of Beijing University of Aeronautics and Astronautics;2012-01
4 DU Qiu ping;Discussion on the calculation of local resistance loss in case of the pipe section enlarging[J];JOURNAL OF CHENGDE PETROLEUM COLLEGE;1999-03
5 Tian Chunxia,Wang Qihang,Zhang Kewen;3D Simulation of Two-Phase Flow of Fuel in Gas and Liquid in Nozzle Hole[J];Design and Manufacture of Diesel Engine;2008-03
6 Wang Qihang,Zhang Kewen(DEUTZ FAW Dalian Diesel Works,Dalian,116022,China);CFD Calculation of the Two-Phase Flow inside K-Factor Injection Nozzle[J];Design and Manufacture of Diesel Engine;2009-04
7 Jin Hai1,Liang Guisen2(1.China Zhongqi Jinan Testing Center,ShandongJinan250032;2.Shanghai Toceil Engine Testing Tech.Co.Ltd.,Shanghai200433);Development of Werabar Flowmeter for Testing Air Displacement of Engine[J];Diesel Engine;2010-01
8 Chen Xiaomin,Chang Hanbao,Qin Jianwen(College of Marine and Power,Naval University of Engineering,HubeiWuhan 430033);Simulative Study on the Flow in the Nozzle Hole of High-pressure Common Rail Injector of Large-power Diesel Engine[J];Diesel Engine;2011-06
9 LI Bao-kuan, WAN Ye-jun , QI Feng-sheng, HUO Hui-fang (School of Materials & Metallurgy, Northeastern University, Shenyang 110004, China.;Experimental Investigation on Circulation Flow in RH Refining System with Swirling Flow[J];JOURNAL OF NORTHEASTERN UNIVERSITY;2005-08
10 QI Feng-sheng,YANG Ran,LI Bao-kuan,CHEN Hai-geng(School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China.);Experimental Investigation on Flow Field in Continuous Casting Mold for Clad Steel[J];Journal of Northeastern University(Natural Science);2009-07
China Proceedings of conference Full-text Database 7 Hits
1 QI Xiaojuan~1,TIAN Rui~1,YANG Xiaohong~1,LI Song~2 (1.School of Energy and Power Engineering,Inner Mongolia University of Technology,Huhhot 010062; 2.Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China);CFD numerical simulation in a hot cavity setting of membrane distillation adopting rotational tangential inpouring[A];[C];2006
2 YU Pei,YAN Chang-qi,GU Hai-feng (College of Nuclear Science and Technology,Harbin Engineering University,Harbin of Heilongjiang Prov.150001,China);Fluctuation analysis in interface layer of density lock[A];[C];2009
3 CHEN Wei,YAN Chang-qi,GU Hai-feng (College of Nuclear Science and Technology,Harbin Engineering University,Harbin of Heilongjiang Prov.150001,China);Analysis on transient characteristics of passive residual heat removal system[A];[C];2009
4 Qi Fengsheng Li Baokuan Chen Haigeng(Northeastern University,Material & Metallurgy Institute,Shenyang 110004);RESEARCH OF IMPROVE THE REFINING EFFICIENCY OF RH DEGASSER USING SWIRLING FLOW[A];[C];2005
5 QI Feng-sheng LI Bao-kuan CHEN Hai-geng (School of Materials and Metallurgy,Northeastern University,Shenyang,Liaoning 110004,China);Investigation on Mixing Behavior of RH Vacuum Degassing Vessel[A];[C];2008
6 LIU Zhong-qiu YANG Wen-chuang WANG Fang LI Bao-kuan (School of Materials&Metallurgy,Northeastern University,Shenyang 110819,China);Flow Characteristics of Metallurgical Reactor driven by Gravitational Potential Energy[A];[C];2010
7 Meng Yunxia;Li Yunqing;Chen Chen;School of Transportation and Engineering,Beijing University of Aeronautics and Astronautics.;;Simulation and Experimental Study in DCI-11 Injector Dynamic Response Characteristics[A];[C];2009
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 WEN Hua JIANG Shui-Sheng School of Mechanical and Electronic Engineering,Nanchang University,Nanchang 330031,China WEI Ming-Rui School of Energy and Power Engineering,Huazhong University of Science and Technology, Wuhan 430074,China;A PRIMARY BREAKUP MODEL FOR DIESEL SPRAY BASED ON TWO-PHASE FLOW IN INJECTOR NOZZLE[J];Journal of Engineering Thermophysics;2008-06
2 CHEN Sheng-chun, LIN Rui-lin, NI Qing-qi (Power Eng. College, Naval Univ. of Engineering, Wuhan 430033, China;Dept. of Basic Courses, Naval Univ. of Engineering, Wuhan 430033, China);Application of optic fiber sensor to measuring the needle displacement of oil injecter[J];Journal of Naval University of Engineering;2003-05
3 Zhang Zongjie Xu Bo Yang Ruilong Zhou Rui Prof.;College of Energy & Power Eng.,Huazhong Univ.of Sci.& Tech.,Wuhan 430074,China.;Analysis of impact and motion of the meedle in diesel engine injector[J];Journal of Huazhong University of Science and Technology(Nature Science Edition);2006-03
4 LI Tao,LIU Yue-Min,WANG Xin-Yong,ZHANG Xiao-Hong (Electron. Inf. Eng. Coll., Henan Univ. of Sci. & Technol., Luoyang 471003,China);Application of Industrial Control Computer to Fuel Injection Pump Test Stand[J];Journal of Luoyang Institute of Technology;2004-02
5 Fu Zhen1,Li Weiquan2,Xu Cangsu1(1.Institute of Power Machinery and Vehicular Engineering ,Zhejiang University,Hangzhou 310027,China; 2.Zhejiang Bureau of Quality and Technical Supervision,Hangzhou 310012,China);Effect of Cavitation inside the Diesel Nozzle on the Spray Characteristics[J];Journal of Agricultural Mechanization Research;2009-03
6 Zhu Fangjun; Chen Teluan; Wu Jian; Lu Jianxin (The South China University of Technology);Research on Fuel Oil Saving of a Diesel Engine with Injectors Having Lighter Needles[J];Chinese Internal Combustion Engine Engineering;1994-04
7 Liu Jianmin.Qiao Xinyong,Zhang Xiaoming (Armored Force Engineering Institute,Beijing 100072);Research on Detecting Injection Quantity of Diesel Engines Based on Neural Network[J];Chinese Internal Combustion Engine Engineering;2002-02
8 HE Zhi-xia1,WANG Qian1,YUAN Jian-ping2,LI De-tao1(1.School of Energy Resources and Power Engineering,Jiangsu University,Zhenjiang 212013,China;2.Research Center of Fluid Machinery and Engineering,Jiangsu University);CFD Analysis for Effect of Injection Pressure Fluctuation on Cavitating Flow in Diesel Engine Nozzle[J];Chinese Internal Combustion Engine Engineering;2009-01
9 WANG Yun (Dept.of Mechanical Engineering,Xiangfan Institute,Xiangfan 441053,China);The Calculation of the Engine Injection Mass[J];Internal Combustion Engines;2005-01
10 DU Hui yong 1, FU Mao lin 1, LIU Jian xin 2, ZHAO Zhi he 2, LI Min 2, ZONG Yong ping 2, DENG Ben du 2 (1.NECL,Tianjin University,Tianjin 300072;2.Louyang Institute of Technology);A Study on the Categories of Cavitation in the Fuel Injection System of a Diesel Engine[J];TRANSACTIONS OF CSICE;1999-04
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved