Research on effects of key influencing factors upon fuel injection characteristics of the combination electronic unit pump for diesel engines

2014 ◽  
Vol 28 (10) ◽  
pp. 4319-4330 ◽  
Author(s):  
Liyun Fan ◽  
Quan Dong ◽  
Chao Chen ◽  
Yun Bai ◽  
Wensheng Zhao ◽  
...  
Keyword(s):  
Influencing Factors ◽  
Diesel Engines ◽  
Fuel Injection ◽  
Electronic Unit ◽  
Electronic Unit Pump

scholarly journals Development of Electronic Unit Pump for Medium Speed Diesel Engines

2010 ◽  
Vol 45 (4) ◽  
pp. 567-571
Author(s):  
Kazuhiro Kitagawa ◽  
Ruban Denis ◽  
Takanori Egashira ◽  
Isao Takagawa
Keyword(s):  
Diesel Engines ◽  
Electronic Unit ◽  
Medium Speed ◽  
Electronic Unit Pump

Effects of Control Valve's Structure Parameters on the Circulation Characteristics for an Electronic Unit Pump

2018 ◽  
Vol 141 (2) ◽  
Author(s):  
Wan-Lin Zhao ◽  
Guo-Xiu Li ◽  
Lan Wang ◽  
Hong-Meng Li ◽  
Jie Wang ◽  
...  
Keyword(s):  
Mass Flow Rate ◽  
High Precision ◽  
Mass Flow ◽  
Flow Rate ◽  
Fuel Injection ◽  
Flow Characteristics ◽  
Control Valve ◽  
Electronic Unit ◽  
Electronic Unit Pump ◽  
Circulation Characteristics

The control valve is an essential component of electronic unit pump (EUP) fuel injection systems; it controls the flow rate with high-precision electrical signals. Thus, high precision and flexibility are required in the working process of a fuel injection system. The flow capacity (indicated by mass flow rate) of a control valve is an important technical indicator in the discharge of EUP fuel injection systems. In this study, the transient flow characteristics within control valve during the discharge of an EUP were evaluated using a computational fluid dynamics (CFD) approach. Three essential structural parameters of EUP control valve were investigated, and their effects on circulation characteristics were evaluated. The variation trends were observed, and the changes in significant physical parameters and crucial physical field distributions were analyzed. During the investigation, the visualization of internal flow of control valve provided more detailed information of flow fields. This study shows the effect of each parameter on flow characteristics and indicates that cavitation is the lowest for the case of 0.20 mm valve core lift; the length of slit is the shortest for the case of 7 mm seal diameter, therefore, the mass flow rate of export is the highest; at 139 deg seal cone angles, fuel velocity is the highest, therefore, 139 deg is the best seal cone angle.

Numerical Modeling and Simulation of Pressure Wave in Combination Electronic Unit Pump High Pressure Pipeline

2013 ◽  
Vol 805-806 ◽  
pp. 1823-1826 ◽  
Author(s):  
Hayat Qaisar ◽  
Li Yun Fan ◽  
Bing Qi Tian ◽  
Zhen Ma Xiu
Keyword(s):  
High Pressure ◽  
Numerical Model ◽  
Pressure Wave ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Injection System ◽  
Fuel Injection System ◽  
Electronic Unit ◽  
Electronic Unit Pump ◽  
High Pressure Pipeline

High pressure (HP) fuel pipeline is one of the major components of Combination Electronic Unit Pump (CEUP) diesel fuel injection system and has significant contribution in building up of high pressure required during fuel injection cycle. A MATLAB numerical model of pressure wave inside HP fuel pipeline of CEUP system using damped wave equation has been developed in MATLAB to study and simulate pressure wave propagation through fuel pipeline at various operating conditions of diesel engine. Finite Difference method has been applied to model and simulate pressure equation at various equidistant locations of fuel pipeline. Dynamic variations of fuel properties as a function of varying pressure have also been incorporated. The MATLAB model has been validated by comparing simulated pressures with those of experimentally validated AMESim numerical model of CEUP fuel injection system. Quantitative comparisons were also done using Root Mean Square Error (RMSE) and Index of Agreement (IA). Results show that MATLAB numerical model is quite accurate especially at low cam rotational speeds and low cam angles.

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