3-D Numerical Simulation on Micro-Hole of the Common-Rail Pipe Abrasive Flow Machining

2013 ◽  
Vol 437 ◽  
pp. 202-206
Author(s):  
Hao Guo ◽  
Jun Ye Li ◽  
Teng Fei Ma
Keyword(s):  
Numerical Simulation ◽  
Fuel Injection ◽  
Volume Fraction ◽  
Three Dimensional ◽  
Common Rail ◽  
Injection System ◽  
Three Dimensional Model ◽  
Abrasive Flow Machining ◽  
Micro Hole ◽  
The Common

Common-rail pipe is an important component of fuel injection system, whose inner cavity is hidden and requires a high precision. So that the general mechanical processing is difficult to achieve, while abrasive flow machining just be able to solve this problem. In this article, the three-dimensional model of common-rail pipe is established and meshed by GAMBIT, next the mesh file is read into FLUENT, and then the Mixture model is used for numerical simulation. By analyzing the simulation results, we can get how will the pressure difference between inlet and outlet, the volume fraction of abrasive, and the processing order impact on the processing quality. Finally, a reasonable processing program is proposed for the common-rail pipe.

Numerical Investigation on the Effect of Abrasive Property for Abrasive Flow Machining

2014 ◽  
Vol 574 ◽  
pp. 406-410
Author(s):  
Li Feng Yang ◽  
Chun Yan Dong ◽  
Wei Na Liu
Keyword(s):  
Material Removal ◽  
Volume Fraction ◽  
Metal Removal ◽  
Particle Volume Fraction ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Particle Volume ◽  
Micro Holes ◽  
Micro Hole ◽  
Abrasive Property

Numerical investigations of the abrasive influence on material removal efficiency of the micro-hole for AFM process is conducted in this paper. A three-dimensional model is constructed for this process. The abrasive with various particles volume fraction and different micro-holes with various diameters are selected in this study. The simulation results show that the lower particle volume fraction may be in favour of the metal removal uniformity, but the processing time will be too long if too low fraction is selected.

Optimized Design of Structure Parameter of New Fuel Injection System

2013 ◽  
Vol 655-657 ◽  
pp. 486-490 ◽  
Author(s):  
Zi Lai Luo ◽  
Kang Huang
Keyword(s):  
Pressure Loss ◽  
Fuel Injection ◽  
Common Rail ◽  
Injection System ◽  
Optimized Design ◽  
Common Rail System ◽  
System Pressure ◽  
Rail Systems ◽  
Marine Diesel ◽  
The Common

According to the characteristics and the future tendency of common rail systems for marine diesel engines，the paper used a new injector. A simulation model of the common rail system with new injector was established using HYDSIM system, pressure fluctuation of the common rail pipe and pressure loss of the injector as evaluation indicator, the injector was simulated and optimized using DOE method. Simulation results show that appropriate selection of the structure parameters of the injector structure can effectively prevent the injectors from interfering each other and degree pressure loss of injector.

A Novel Pressure Control Mechanism for Common Rail Fuel Injection Systems

2009 ◽  
Author(s):  
Vivek Kumar Gupta ◽  
Zhen Zhang ◽  
Zongxuan Sun
Keyword(s):  
Internal Combustion Engines ◽  
Fuel Injection ◽  
Control Mechanism ◽  
Pressure Fluctuations ◽  
Pressure Control ◽  
Common Rail ◽  
Injection System ◽  
Periodic Signal ◽  
Rotational Angle ◽  
The Common

This paper presents the modeling of a novel pressure control mechanism for a common rail (CR) fuel injection system of internal combustion engines (ICE). The pressure fluctuations in the common rail caused by multiple injections negatively affect the accuracy of both injected fuel quantities and flow rates. The objective of this work is to design a new control mechanism to suppress the pressure pulsation in the rail. First we develop a one-dimensional distributed model for the common rail by using basic fluid flow equations, which can capture the distributed dynamics of the pressure disturbances in the rail and this result is validated with a physics based simulation model in AMESIM®. The periodic nature of injection event due to stroke by stroke motion of the ICE generates disturbance in the rail which in the rotational angle domain presents a primarily periodic signal. However, the period changes in the time domain due to the variation in engine speed. We then propose the concept of an active fluid storage device like a piezoelectric actuator (PZT) to minimize this pressure fluctuations. The location of the actuator on the common rail has also been evaluated to maximize its effect. Finally a time-varying repetitive controller is designed to compensate for the periodic pressure disturbances in the rotational angle domain.

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