Comparison of JP-8 Sprays from a Hydraulically Actuated Electronically Controlled Unit Injector and a Common Rail Injector

2015 ◽  
Author(s):  
Matthew Kurman ◽  
Michael Tess ◽  
Luis Bravo ◽  
Chol-Bum Kweon ◽  
Craig Hershey
Keyword(s):  
Common Rail ◽  
Hydraulically Actuated ◽  
Common Rail Injector ◽  
Unit Injector

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 and Numerical Assessment of Multi-Event Injection Strategies in a Solenoid Common-Rail Injector

2017 ◽  
Vol 10 (4) ◽  
pp. 2129-2140 ◽  
Author(s):  
Andrea Piano ◽  
Giulio Boccardo ◽  
Federico Millo ◽  
Andrea Cavicchi ◽  
Lucio Postrioti ◽  
...  
Keyword(s):  
Common Rail ◽  
Numerical Assessment ◽  
Common Rail Injector ◽  
Injection Strategies

Diesel Engine Potentials by Hydraulic Tuning of the G4S Solenoid Common Rail Injector with 3-Way Function

2015 ◽  
pp. 33-51 ◽  
Author(s):  
Olaf-E. Herrmann ◽  
Koji Ishizuka ◽  
Dirk Queck ◽  
Jörg Ruwe ◽  
Katsuhiko Takeuchi ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Common Rail ◽  
Common Rail Injector

The new Liebherr LI1 Common Rail Injector Platform

2018 ◽  
pp. 171-187
Author(s):  
Norbert Schöfbänker ◽  
Richard Pirkl ◽  
Dennis Herrmann ◽  
Verena Kögel
Keyword(s):  
Common Rail ◽  
Common Rail Injector

Hold current effects on the power losses of high-speed solenoid valve for common-rail injector

2018 ◽  
Vol 128 ◽  
pp. 1579-1587 ◽  
Author(s):  
Jianhui Zhao ◽  
Pengfei Yue ◽  
Leonid Grekhov ◽  
Xiuzhen Ma
Keyword(s):  
High Speed ◽  
Solenoid Valve ◽  
Common Rail ◽  
Power Losses ◽  
Common Rail Injector
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