scholarly journals Structural simulation analysis of high pressure common rail pipe

2021 ◽  
Vol 39 ◽  
pp. 163-168
Author(s):  
Xiaojun Zhou ◽  
Kangjia Du ◽  
Si Qin ◽  
Dongdi Liu
Keyword(s):  
High Pressure ◽  
Simulation Analysis ◽  
Common Rail ◽  
Structural Simulation ◽  
High Pressure Common Rail

scholarly journals Research on the Characteristics of Operating Non-Uniformity of a High-Pressure Common-Rail Diesel Engine Based on Crankshaft Segment Signals

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 64906-64917
Author(s):  
Yuhua Wang ◽  
Guiyong Wang ◽  
Guozhong Yao ◽  
Lizhong Shen
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Common Rail ◽  
High Pressure Common Rail

Study on the leakage of plunger pair under static condition in high-pressure common rail injector considering deformation effect

2021 ◽  
pp. 095440702110656
Author(s):  
Zhenbo Gao ◽  
Yong Zhang ◽  
Dandan Wang
Keyword(s):  
High Pressure ◽  
Physical Properties ◽  
Thickness Distribution ◽  
Physical Property ◽  
Static Condition ◽  
Flow Equation ◽  
Common Rail ◽  
Plunger Pair ◽  
Common Rail Injector ◽  
High Pressure Common Rail

Plunger pair is the key component of high pressure common rail injector and its sealing performance is very important. Therefore, it is of great significance to study the leakage mechanism of plunger pair. Under static condition, the high-pressure fuel flow in the gap of the plunger pair caused the deformation of the plunger pair structure and the temperature rise of fuel. For a more comprehensive and accurate study, the effect of deformation, including elastic deformation and thermal expansion, the physical properties of fuel, including density, viscosity and specific heat capacity, as well as the influence of plunger posture in the plunger sleeve, including concentric, eccentric, and inclination condition, are considered in this paper. Firstly, the mathematical models including Reynolds equation, film thickness equation, non-isothermal flow equation, parametric equation of fuel physical property, and section velocity equation are established. The numerical analysis based on finite difference method for the solution of these models is given, which can simultaneously solve for the fuel film pressure distribution, temperature distribution, thickness distribution, distribution of fuel physical properties, and leakage rate. The models are validated by comparing the calculated leakage rates with the measurements. The effects under different posture of plunger are discussed too. Some of the conclusions provided good guidance for the design of high-pressure common rail injector.

Experimental Study of Spray Penetration under High Pressure Common Rail Condition

2011 ◽  
Vol 347-353 ◽  
pp. 66-69
Author(s):  
Jian Xin Liu ◽  
Song Liu ◽  
Hui Yong Du ◽  
Zhan Cheng Wang ◽  
Bin Xu
Keyword(s):  
High Pressure ◽  
High Speed ◽  
Injection Pressure ◽  
Electronic System ◽  
Common Rail ◽  
Spray Penetration ◽  
Jet Breakup ◽  
Secondary Breakup ◽  
Breakup Time ◽  
High Pressure Common Rail

The fuel spray images were taken with an equipment (camera-flash-injection) which has been synchronized with a purpose made electronic system under the condition of the high pressure common rail in two injection pressure has been expressed in this paper. It is discovered when fitting spray tip penetration that after jet breakup for a period of time, the spray tip begin to slow down rapidly, and the speed of spray tip running becomes smooth. Hiroyasu and other traditional tip penetration fitting formula are fitting larger to this phase. This is because that after jet breakup, the secondary breakup of striker particles will occur under the influence of the aerodynamic, surface tension and viscosity force. Therefore, a spray penetration fitting formula containing secondary breakup time to fit penetration in three sections was proposed in this paper. Results show that when pressure difference increase, both first and second breakup time become earlier. The former is because of gas-liquid relative velocity increasing, while the latter is due to high speed interface movement acceleration increasing.

Lubricity Doser Evaluation Studies on High Pressure Common Rail Fuel Systems

2014 ◽  
Author(s):  
Nigil Jeyashekar ◽  
Robert Warden ◽  
Edwin A. Frame
Keyword(s):  
High Pressure ◽  
Evaluation Studies ◽  
Common Rail ◽  
High Pressure Common Rail
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