Analysis of Cyclic Fluctuations of Charge Motion and Mixture Formation in a DISI Engine in Stratified Operation

2007 ◽  
Author(s):  
Philipp Adomeit ◽  
Oliver Lang ◽  
Stefan Pischinger ◽  
Richard Aymanns ◽  
Markus Graf ◽  
...  
Keyword(s):  
Charge Motion ◽  
Mixture Formation

Charge Motion and Mixture Formation Analysis of a DISI Engine Based on an Adaptive Parallel Mesh Approach

2014 ◽  
Author(s):  
Karl Georg Stapf ◽  
Sandeep Menon ◽  
David Schmidt ◽  
Michael Rieß ◽  
Marc Sens
Keyword(s):  
Charge Motion ◽  
Mixture Formation

Study of the Effects of Flow Box Utilization on Charge Motion and Mixture Formation in an Internal Combustion Engine

2017 ◽  
Author(s):  
Fábio de Castro Radicchi ◽  
Leonardo Mayer Reis ◽  
Bruno Vieira Silva ◽  
Ramon Molina Valle ◽  
Erwin Karl Franieck ◽  
...  
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Charge Motion ◽  
Mixture Formation

Combustion System Optimization of a Gasoline Direct Injection Engine

2011 ◽  
Vol 354-355 ◽  
pp. 419-428
Author(s):  
Li Yan Feng ◽  
Chun Hua Zhang ◽  
Jiang Ping Tian ◽  
Wu Qiang Long ◽  
Jun Li ◽  
...  
Keyword(s):  
Fuel Injection ◽  
Direct Injection ◽  
System Optimization ◽  
Gasoline Direct Injection ◽  
Combustion System ◽  
Charge Motion ◽  
Mixture Formation ◽  
Direct Injection Engine ◽  
Gasoline Direct Injection Engine ◽  
Optimal Injection

With the purpose of optimizing the combustion system of a homogeneous charged gasoline direct injection engine, its working process was simulated with a 3-D CFD software package. The authors investigated the influence of injection timings and combustion chamber shapes on the charge motion, fuel injection and their influence on fuel-air mixture formation. With the comparisons of fuel-air mixture quality and combustion processes between two typical injection timings, the optimal injection strategy was chosen. To further improve the mixture quality, configuration on piston crown was optimized and analysis on mixture formation processes of the new configurations was made. Simulation results indicate that the new configurations have faster fuel evaporation rate and better mixture homogeneity.

scholarly journals Spray propagation and mixture formation in an air guided direct injection gasoline engine

2000 ◽  
Vol 1 (2) ◽  
pp. 163-170 ◽  
Author(s):  
P Adomeit ◽  
O Lang ◽  
S Pischinger
Keyword(s):  
Gasoline Engine ◽  
Cfd Simulation ◽  
Direct Injection ◽  
Operation Mode ◽  
Cone Angle ◽  
Injection Pressure ◽  
Gasoline Direct Injection ◽  
Orifice Diameter ◽  
Charge Motion ◽  
Mixture Formation

Numerical analysis is used to gain information on the spray propagation and mixture formation in tumble guided gasoline direct injection (DI) engines. In order to achieve reliable predictions an atomization model for high-pressure swirl injectors is described and verified by comparison to experimental data. The approach is capable of adequately predicting the most important effects, such as nozzle orifice diameter, cone angle or injection pressure on spray development. Furthermore, it is found that the pre-jet generated at the beginning of the injection strongly affects the overall spray development. The temporal development of the pre-jet is described empirically. The in-cylinder computational fluid dynamics (CFD) analysis reveals that the tumble charge motion strongly affects spray propagation and mixture formation in the stratified operation mode, as it transports the fuel vapour cloud towards the spark plug. The CFD simulation improves understanding of the interaction between the flow field, spray propagation and evaporation and enables guidance of the optimization of the flow control and of the injection parameters for tumble guided gasoline DI engines.

ANALYSIS OF THE POSSIBILITIES OF REGULATING THE PROCESS OF MIXTURE FORMATION IN MICROJET BURNERS WITH CYLINDRICAL FLAME STABILIZERS

2017 ◽  
Author(s):  
Nataliia Fialko ◽  
◽  
Viktor Prokopov ◽  
Julii Sherenkovskiy ◽  
Oleksandra Tymoshchenko ◽  
...  
Keyword(s):  
Mixture Formation

Charge Motion Effects in Ionic Clusters

1991 ◽  
Author(s):  
Isidore Last ◽  
Thomas F. George
Keyword(s):  
Charge Motion ◽  
Ionic Clusters

Charge motion on silicon oxide surfaces

1967 ◽  
Vol 6 (4) ◽  
pp. 440-460 ◽  
Author(s):  
P. Ho ◽  
K. Lehovec ◽  
L. Fedotowsky
Keyword(s):  
Silicon Oxide ◽  
Oxide Surfaces ◽  
Charge Motion

Multi-dimensional modeling of the air/fuel mixture formation process in a PFI engine for motorcycle applications

2009 ◽  
Author(s):  
T. Lucchini ◽  
G. D'Errico ◽  
F. Brusiani ◽  
G. M. Bianchi ◽  
Ž. Tuković ◽  
...  
Keyword(s):  
Formation Process ◽  
Fuel Mixture ◽  
Mixture Formation ◽  
Dimensional Modeling

MACROSCOPICALLY QUANTIZED HOLE STATES IN La2-χSrχCuO4-δ FILM CRYSTAL OBSERVABLE UP TO ROOM TEMPERATURE

2001 ◽  
Vol 15 (09) ◽  
pp. 1239-1252 ◽  
Author(s):  
M. SUGAHARA ◽  
S. OGI ◽  
K. ARAKI ◽  
R. SUGIURA
Keyword(s):  
Doping Level ◽  
Low Frequency ◽  
Side Surface ◽  
Life Time ◽  
Cell Number ◽  
Polarization Property ◽  
Dielectric Measurement ◽  
Charge Motion ◽  
Macroscopic Quantum ◽  
Macroscopic Quantum Effects

Theoretical study of multi-layered CuO 2 surfaces with localization potential shows that (i) special stable macroscopic quantum states appear when [Formula: see text], where χ is the doping level and G is the unit-cell number, and that (ii) the physical phenomena related to ‖c charge motion takes place just as expected in the fictitious situation where whole uniformly doped holes concentrate in one-side surface. In the dielectric measurement of doping-level dependence and film-thickness dependence on c-oriented La 2-χ Sr χ CuO 4-δ film, we find that (a) anomalous low-frequency polarization is enhanced when a scaling parameter χG is near to [Formula: see text], that (b) quasi-static measurement of the polarization property in low doped film shows two typical characteristics explicable by the fictitious charge concentrations, and that (c) ‖c small-voltage conduction measurement on low doped film also shows two types of characteristic which are switched each other triggered by laser irradiation. Since these macroscopic quantum effects with plural levels with very long life time are observable even up to room temperatures, they may be useful in quantum computing application.

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