LIF Imaging of Auto-ignition and Combustion in a Direct Injection Diesel-fuelled HCCI Engine

2005 ◽  
Author(s):  
Julian T. Kashdan ◽  
Jean-François Papagni
Keyword(s):  
Direct Injection ◽  
Hcci Engine ◽  
Auto Ignition ◽  
Ignition And Combustion

Flow and Combustion in a Transparent 1.9 Litre Direct Injection Diesel Engine

1994 ◽  
Vol 208 (3) ◽  
pp. 191-205 ◽  
Author(s):  
C Arcoumanis ◽  
J H Whitelaw ◽  
W Hentschel ◽  
K-P Schindler
Keyword(s):  
Diesel Engines ◽  
Laser Diagnostics ◽  
Direct Injection ◽  
Computer Code ◽  
Operating Conditions ◽  
Auto Ignition ◽  
Sufficient Detail ◽  
Generating Capacity ◽  
Ignition And Combustion ◽  
Cylinder Flow

Two identical 1.9 litre direct injection (DI) diesel engines having optical access for application of laser diagnostics were operated at Volkswagen and Imperial College as part of the European programme (IDEA) on diesel engines. A variety of complementary laser-based techniques were used to characterize the flow-generating capacity of the intake system under steady flow conditions, the in-cylinder flow during induction and compression as well as the spray development, auto-ignition and combustion under three typical engine operating conditions. The most important results of this programme are presented and discussed here in view of their implications for improved combustion and reduction of exhaust emissions in small direct injection diesel engines, through better matching of the spray characteristics with the in-cylinder flow as a function of engine speed and load. The results were obtained in sufficient detail to allow validation of the multi-dimensional computer code developed within the IDEA programme.

A Study of Controlling the Auto-Ignition and Combustion in a Gasoline HCCI Engine

2004 ◽  
Author(s):  
Shiro Yamaoka ◽  
Hiromu Kakuya ◽  
Shinji Nakagawa ◽  
Toshiharu Nogi ◽  
Atsushi Shimada ◽  
...  
Keyword(s):  
Hcci Engine ◽  
Auto Ignition ◽  
Ignition And Combustion

Study on Auto-Ignition and Combustion Mechanism of HCCI Engine

2004 ◽  
Author(s):  
Norimasa Iida ◽  
Yudai Yamasaki ◽  
Susumu Sato ◽  
Kengo Kumano ◽  
Yuichiro Kojima
Keyword(s):  
Combustion Mechanism ◽  
Hcci Engine ◽  
Auto Ignition ◽  
Ignition And Combustion

Modelling of ignition mechanisms and pollutant formation in direct-injection diesel engines with multiple injections

2005 ◽  
Vol 6 (3) ◽  
pp. 231-246 ◽  
Author(s):  
C Hasse ◽  
N Peters
Keyword(s):  
Diesel Engine ◽  
Direct Injection ◽  
Propagation Speed ◽  
Scalar Dissipation ◽  
Pollutant Formation ◽  
Multiple Injections ◽  
Start Of Injection ◽  
Engine Combustion ◽  
Main Injection ◽  
Ignition And Combustion

Multiple injections are an important aspect in modern direct-injection diesel engine development. The representative interactive flamelet (RIF) model, which was successfully used previously for simulations of diesel engine combustion, was recently extended to model multiple injections. In this paper this new RIF model is applied to model ignition and combustion with a pilot and a main injection with various dwell times, start of injection timings, and loads. Special emphasis is placed on the ignition of the main injection. It is shown that, for the investigated cases, the main injection does not auto-ignite but it is ignited by a strained premixed flame that propagates from the pilot injection to the mixture field of the main injection. The structure of that flame and the influence of the scalar dissipation rate on the propagation speed are investigated in detail. In addition to pressure curves, modelling results for NOx and soot emissions are compared with experimental data, showing good agreement.

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