A Study of Gas Exchange Process Simulation of an Automotive Multi-Cylinder Internal Combustion Engine

1982 ◽  
Author(s):  
Miasaaki Takizawa ◽  
Tatsuo Uno ◽  
Toshiaki Oue ◽  
Tadayoshi Yura
Keyword(s):  
Gas Exchange ◽  
Internal Combustion Engine ◽  
Process Simulation ◽  
Combustion Engine ◽  
Exchange Process ◽  
Internal Combustion ◽  
Gas Exchange Process

LES of the Gas-Exchange Process Inside an Internal Combustion Engine Using a High-Order Method

2019 ◽  
Vol 104 (2-3) ◽  
pp. 673-692 ◽  
Author(s):  
G. K. Giannakopoulos ◽  
C. E. Frouzakis ◽  
P. F. Fischer ◽  
A. G. Tomboulides ◽  
K. Boulouchos
Keyword(s):  
Gas Exchange ◽  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Exchange Process ◽  
Internal Combustion ◽  
High Order ◽  
Order Method ◽  
High Order Method ◽  
Gas Exchange Process

scholarly journals Experimental test and thermodynamic analysis on scaling-down limitations of a reciprocating internal combustion engine

2020 ◽  
Vol 103 (3) ◽  
pp. 003685042093573
Author(s):  
Huichao Shang ◽  
Li Zhang ◽  
Bin Chen ◽  
Xi Chen
Keyword(s):  
Gas Exchange ◽  
Internal Combustion Engine ◽  
Internal Combustion Engines ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Small Scale ◽  
Combustion Engines ◽  
Effective Pressure ◽  
Scaling Down ◽  
Meso Scale

Due to the enormous energy densities of liquid hydrocarbon fuels for future utilization on micro scale, there is a concern about the feasibility of scaling down reciprocating internal combustion engines from small scale to meso scale. By building a specialized test bench, the performance and combustion characteristics of a miniature internal combustion engine with a displacement of 0.99 cc were tested, and the thermodynamic simulation was carried out to achieve a more complete understanding of in-cylinder mass and energy change of the miniature internal combustion engine. The miniature internal combustion engine had higher brake-specific fuel consumption, lower thermal efficiency, lower brake mean effective pressure, and serious cyclic variation; however, friction mean effective pressure seems to be less sensitive to engine speed. Simulation results showed that the miniature internal combustion engine had a poor volumetric efficiency, which was not more than 50%. The step-by-step processes of scaling down the miniature internal combustion engine were also simulated; it was found that the maximum indicated mean effective pressure loss was due to the imperfection of gas exchange processes, and the next was the imperfection of combustion. It is considered that for the scaled-down miniature internal combustion engines, more attention should be pay on improving the processes of gas exchange and combustion, and achieving meso-scale internal combustion engines with cylinder bore less than 1 mm is thermodynamically possible in future if these imperfections, especially that of the gas exchange process, can be effectively perfected.

Modifications to the Method of Characteristics for the Analysis of the Gas Exchange Process in Internal Combustion Engines

1986 ◽  
Vol 200 (4) ◽  
pp. 259-266 ◽  
Author(s):  
F Payri ◽  
J M Corberán ◽  
F Boada
Keyword(s):  
Gas Exchange ◽  
Internal Combustion Engines ◽  
Method Of Characteristics ◽  
Exchange Process ◽  
Internal Combustion ◽  
Linear Interpolation ◽  
Combustion Engines ◽  
The Method Of Characteristics ◽  
Grid Points ◽  
Gas Exchange Process

Some modifications to the method of characteristics for the analysis of the gas exchange process in internal combustion engines are presented in this paper. The modifications are related to the calculation of the path lines and the Riemann characteristic lines at the grid points. Regarding the path lines, the algorithm for the generation and elimination of path lines has been improved, mainly for the cases in which the fluid motion passes from being null or going out of the pipe to going into the pipe. In those cases the algorithm proposed by Benson can cause some mistakes in the entropy level field of the duct. An alternative method is proposed: the duplication ofpath lines. The other modifcation proposed is related to assuming a linear interpolation for the pressure and the volume flowrate between the nearest grid points, rather than assuming a linear interpolation of the value of the Riemann characteristics. These modijcations substantially improve the results obtained in the calculation of the fluid flow in manifolds of reciprocating internal combustion engines.

Prediction of Power Output Performance of the Rotary Engine by Gas Exchange Process Simulation

1990 ◽  
Author(s):  
Toshihiko Osumi ◽  
Koji Onishi ◽  
Hidetoshi Nobumoto ◽  
Kazutoyo Watanabe ◽  
Junichi Funamoto
Keyword(s):  
Gas Exchange ◽  
Power Output ◽  
Process Simulation ◽  
Exchange Process ◽  
Rotary Engine ◽  
Output Performance ◽  
Gas Exchange Process
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