MS3-3: High-Speed Diesel Combustion Model for Transient Simulation of After-Treatment Systems(MS: Modeling and Simulation,General Session Papers)

Author(s):  
Kazushige Kikuta ◽  
Yutaka Tabe ◽  
Takemi Chikahisa ◽  
Yusuke Takashima
Author(s):  
Takemi Chikahisa ◽  
Yutaka Tabe ◽  
Kazushige Kikuta ◽  
A. S. M. Sayem

To design a diesel engine adapting to future exhaust gas regulation, it is important to develop a driving mode simulator which can simulate vehicle performance and exhaust emissions including after-treatment system. The combustion model for this objective must be able to simulate heat release rate, variety of emissions necessary for after-treatment simulation, and exhaust gas temperature in very short computational time. The authors have developed a diesel combustion model based on the Hiroyasu model by adding variety of modifications to minimize optimization process of the empirical constants. It was shown that the simulation results with the improvement model were in good agreement with the experimental results. By adding Tsurushima model consisting of nine reaction steps with several intermediate species, the model became available for the both combustions of spray diffusion flame and of homogeneous charge compression ignition.


2007 ◽  
Vol 2007.46 (0) ◽  
pp. 145-146
Author(s):  
Yusuke Takashima ◽  
Takemi Chikahisa ◽  
Yutaka Tabe ◽  
Kazusige Kikuta

2014 ◽  
Vol 659 ◽  
pp. 189-194
Author(s):  
Lidia Gaiginschi ◽  
Iulian Agape ◽  
Adrian Sachelarie ◽  
Mihai Alin Girbaci

The research efforts in the direction of internal combustion engines functional cycle simulation, particularly for small capacity diesel engines, are justified by shortening the path between the new conceptual solution and its effects and also to reduce research costs. There can be adopted new organizational and management solutions for the combustion process after these, for example, confirm at the model level. This paper proposes an unizonal physico-mathematical combustion model in high speed small Diesel engines, based on a Vibe-type law and on the heat transfer through the combustion chamber walls modelated after Woschni. The complexity of the model justifies the name of „virtual engine”. This allows to determine the functional parameters as instantaneous and average values, at any engine operating regime. The simulated experiment takes place in perfectly controlled conditions and leads to good results. There are obtained, during the combustion process, dynamics of parameters concerning the vaporization characteristics, combustion characteristics and combustion kinetics, for any operating regime. The parameters are evolving in a predictable way, being experimentally confirmed.


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