scholarly journals Visualization of the homogeneous charge compression ignition/controlled autoignition combustion process using two-dimensional planar laser-induced fluorescence imaging of formaldehyde

2003 ◽  
Vol 217 (12) ◽  
pp. 1125-1134 ◽  
Author(s):  
Z Peng ◽  
H Zhao ◽  
N Ladommatos
Keyword(s):  
Fluorescence Imaging ◽  
Homogeneous Charge Compression Ignition ◽  
Combustion Process ◽  
Laser Induced Fluorescence ◽  
Compression Ignition ◽  
Two Dimensional ◽  
Planar Laser Induced Fluorescence ◽  
Planar Laser ◽  
Controlled Autoignition ◽  
Homogeneous Charge

A physics-based approach to the control of homogeneous charge compression ignition engines with variable valve actuation

2005 ◽  
Vol 6 (4) ◽  
pp. 361-375 ◽  
Author(s):  
G M Shaver ◽  
M J Roelle ◽  
P A Caton ◽  
N B Kaahaaina ◽  
N Ravi ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Homogeneous Charge Compression Ignition ◽  
Control Strategies ◽  
Combustion Process ◽  
System Control ◽  
Compression Ignition ◽  
Variable Valve Actuation ◽  
Variable Valve ◽  
Homogeneous Charge ◽  
Valve Actuation

Homogeneous charge compression ignition (HCCI) is a promising low-temperature combustion strategy for reducing NOx emissions and increasing efficiency in internal combustion engines. However, HCCI has no direct combustion initiator and, when achieved by reinducting or trapping residual exhaust gas with a variable valve actuation (VVA) system, becomes a dynamic process as the temperature of the residual gas couples one cycle to the next. These characteristics of residual-affected HCCI present a challenge for control engineers and a barrier to implementing HCCI in a production engine. In order to address these challenges, this paper outlines physics-based control strategies for both the VVA system and the HCCI combustion process. The results show that VVA system control can provide arbitrary valve timings on a cycle-to-cycle basis, enabling tight control of HCCI. By abstracting these valve timings further into an inducted gas composition and an effective compression ratio, model-based controllers can be developed to control simultaneously load and combustion timing in an HCCI engine.

Planar laser-induced fluorescence imaging of crevice hydrocarbon emissions in a spark-ignited engine

1998 ◽  
Vol 27 (2) ◽  
pp. 2069-2076 ◽  
Author(s):  
David F. Marran ◽  
Marshall B. Long ◽  
William M. Studzinski ◽  
J. Christian Swindal ◽  
William P. Acker
Keyword(s):  
Fluorescence Imaging ◽  
Laser Induced Fluorescence ◽  
Hydrocarbon Emissions ◽  
Planar Laser Induced Fluorescence ◽  
Planar Laser
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