Fast Burning and Reduced Soot Formation via Ultra-High Pressure Diesel Fuel Injection

1991 ◽  
Author(s):  
Haruyuki Yokota ◽  
Takeyuki Kamimoto ◽  
Hidenori Kosaka ◽  
Kinji Tsujimura
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Soot Formation ◽  
Ultra High Pressure ◽  
Diesel Fuel Injection

Numerical Simulation of the Dynamic Response of a Diesel Fuel Injector Using CFD

2005 ◽  
Author(s):  
Yong Yi ◽  
Aleksandra Egelja ◽  
Clement J. Sung
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Dynamic Response ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection System ◽  
Fuel Injection System ◽  
Fuel Injector ◽  
Diesel Fuel Injection ◽  
Very High

The development of a very high pressure diesel fuel injection system has been one of the key solutions to improve engine performance and to reduce emissions. The diesel fuel management in the injector directly affects how the fuel spray is delivered to the combustion chamber, and therefore affects the mixing, combustion and the pollutants formation. To design such a very high pressure diesel fuel injection system, an advanced CFD tool to predict the complex flow in the fuel injection system is required in the robust design process. In this paper, a novel 3D CFD dynamic mesh with cavitation model is developed to simulate the dynamic response of the needle motion of a diesel fuel injector corresponding to high common rail pressure and other dimensional design variables, coupling with the imbalance of the spring force and the flow force (pressure plus viscous force). A mixture model is used for cavitation resulting from high speed flow in fuel injector. Due to the lack of experimental data, the model presented in this paper is only validated by a limited set of experimental data. Required meshing strategy is also discussed in the paper.

High Pressure Sensor for Use in Common Rail Diesel Fuel Injection Systems

1998 ◽  
Author(s):  
Donald E. Paulus ◽  
Michael L. Dunbar
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Pressure Sensor ◽  
Fuel Injection ◽  
Common Rail ◽  
Diesel Fuel Injection

scholarly journals Complex multicomponent real-fluid thermodynamic model for high-pressure Diesel fuel injection

Fuel ◽  
2019 ◽  
Vol 257 ◽  
pp. 115888 ◽  
Author(s):  
C. Rodriguez ◽  
Houman B. Rokni ◽  
P. Koukouvinis ◽  
Ashutosh Gupta ◽  
M. Gavaises
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Thermodynamic Model ◽  
Fuel Injection ◽  
Real Fluid ◽  
Diesel Fuel Injection

Development of cavitation and enhanced injector models for diesel fuel injection system simulation

2002 ◽  
Vol 216 (7) ◽  
pp. 607-618 ◽  
Author(s):  
H-K Lee ◽  
M F Russell ◽  
C S Bae ◽  
H D Shin
Keyword(s):  
High Pressure ◽  
Bulk Modulus ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Injection System ◽  
Fuel Injection System ◽  
Non Linear ◽  
Diesel Fuel Injection ◽  
Injection Pressures

To expedite the application of fuel injection equipment to diesel engines, powertrain engineers are simulating the rate of injection with computer models. Many of the simple models give quite substantial errors if fuel cavitation in the high pressure system and the variations in bulk modulus with temperature and pressure are not included. This paper discuses cavitation and a companion paper discusses the treatment of non-linear bulk modulus. Diesel fuel injection nozzle hole size has been reduced and the injection pressures have been raised, to improve combustion, and the termination of the injection has been accelerated, to reduce carbon particle mass in the exhaust. High injection pressures and rapid termination set up very large hydraulic waves in the pipes and drillings of the fuel injection system, be it pump-pipe-nozzle or accumulator/common rail in type. The fuel momentum generated in these vigorous wave actions leaves such low pressures in parts of the system that vapour bubbles form in the fuel. Cavitation changes the bulk modulus of the fuel and the collapse of the cavities imparts sudden high pressure pulses to the fuel columns in the system and changes injection characteristics significantly. When modelling devices to control injection rate, the cavitation and non-linear bulk modulus have to be incorporated into the model. To this end, the concept of ‘condensation’ has been useful. The cavitated pipe section is divided into liquid and liquid + vapour mixture columns and modified momentum and mass conservation equations are applied separately. The model has been validated with a particular application of a rotary distributor pump to a high speed direct injection diesel engine, which is one of the more difficult fuel injection systems to model in which cavitation occurs at several operating conditions. The simulation results show the cavitation characteristics very well. This cavitated flow calculation model may be applied to other one-dimensional flow systems In addition, a more comprehensive injector model is introduced, which considers two loss factors at the needle seat and holes, sac volume, and viscous drag and leakage. This enhanced injector model shows some improvement at low load conditions

scholarly journals A High-Pressure Diesel Fuel Injection System by Means of Hydraulic Spool Acceleration.

1993 ◽  
Vol 59 (559) ◽  
pp. 872-879
Author(s):  
Makoto Ikegami ◽  
Koji Yamane ◽  
Katsuhiko Takeuchi ◽  
Qi-Ming Zhu
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection System ◽  
Fuel Injection System ◽  
Diesel Fuel Injection

A High-Pressure Diesel Fuel Injection System Using Spool Acceleration and Oil Hammering

1993 ◽  
Author(s):  
Makoto Ikegami ◽  
Koji Yamane ◽  
Katsuhiko Takeuchi ◽  
Tohru Neichi
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Injection System ◽  
Fuel Injection System ◽  
Diesel Fuel Injection

Insights into Deposit Formation in High Pressure Diesel Fuel Injection Equipment

2010 ◽  
Author(s):  
Jim Barker ◽  
G John Langley ◽  
Paul Richards
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Deposit Formation ◽  
Injection Equipment ◽  
Diesel Fuel Injection

Analysis of high-pressure Diesel fuel injection processes using LES with real-fluid thermodynamics and transport

2015 ◽  
Vol 35 (2) ◽  
pp. 1603-1611 ◽  
Author(s):  
Guilhem Lacaze ◽  
Antony Misdariis ◽  
Anthony Ruiz ◽  
Joseph C. Oefelein
Keyword(s):  
High Pressure ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Real Fluid ◽  
Diesel Fuel Injection
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