Correlation analysis of factors influencing the electronic unit pump cycle fuel injection quantity under overall operating conditions for diesel engines

2012 ◽  
Vol 26 (9) ◽  
pp. 2929-2939 ◽  
Author(s):  
Yao Chong ◽  
Fan Li-yun ◽  
Dong Quan ◽  
Song En-zhe ◽  
Tian Bing-qi
Keyword(s):  
Correlation Analysis ◽  
Diesel Engines ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Electronic Unit ◽  
Factors Influencing ◽  
Injection Quantity ◽  
Electronic Unit Pump

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.

Study of Fuel Injection Quantity Fluctuation in High Pressure Common Rail System in Entire Operating Conditions

2012 ◽  
Vol 562-564 ◽  
pp. 1048-1053 ◽  
Author(s):  
Bing Qi Tian ◽  
Li Yun Fan ◽  
Xiu Zhen Ma ◽  
Hao Wang ◽  
Hong Bin Liu
Keyword(s):  
High Pressure ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Common Rail ◽  
Flow Coefficient ◽  
Valve Lift ◽  
Orifice Diameter ◽  
Common Rail System ◽  
Injection Quantity ◽  
High Pressure Common Rail

Variations in high pressure common rail (HPCR) system characteristic parameters influence injection characteristics and lead to fluctuation of fuel injection quantity (FIQ). The fuel injection quantity fluctuation (FIQF) has adverse affects both on coherence and stability of HPCR system. Numerical simulation model of HPCR has been developed and its accuracy has been validated by experimental results. Influence law and generation mechanism of FIQF caused by variations of different parameters such as fuel return pressure, solenoid reset force, control valve lift, fuel return orifice (A orifice) diameter, fuel inlet orifice (Z orifice) diameter, injector needle lift, needle pre-tightening force and injector flow coefficient in entire operating conditions have been analyzed.

Pressure Modeling of Combination Electronic Unit Pump Fuel Pipeline with Rapeseed Methyl Ester

2014 ◽  
Vol 488-489 ◽  
pp. 966-969 ◽  
Author(s):  
Qaisar Hayat ◽  
Li Yun Fan ◽  
Xiu Zhen Ma ◽  
Bing Qi Tian ◽  
En Zhe Song ◽  
...  
Keyword(s):  
Wave Equation ◽  
Diesel Engine ◽  
Methyl Ester ◽  
Operating Conditions ◽  
Injection System ◽  
Biodiesel Fuel ◽  
Electronic Unit ◽  
System Pressure ◽  
Electronic Unit Pump ◽  
Rapeseed Methyl Ester

An alternate biodiesel fuel Rapeseed Methyl Ester (RME) has been evaluated for diesel engine Combination Electronic Unit Pump (CEUP) fuel injection system. Pressure wave modeling of CEUP high pressure fuel pipeline using viscous damped wave equation has been done in MATLAB at various operating conditions of diesel engine. Finite Difference method has been used to model and simulate wave equation at eleven equidistant locations along fuel pipeline. Results show increase in pressure, density, acoustic wave speed and bulk modulus amplitudes with RME fuel as compared to conventional diesel fuel.

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