Simultaneous OH- and formaldehyde planar-LIF measurements have been performed in an optical engine using two laser sources working on 283 and 355 nm, respectively. The measurements were performed in a light duty Diesel engine, using n-heptane as fuel, converted to single-cylinder operation and modified for optical access. It was also equipped with a direct injection common rail system as well as an EGR system.The engine was operated in both HCCI mode, using a single fuel injection, and UNIBUS (Uniform Bulky Combustion System) mode, using two injections of fuel with one of the injections at 50 CAD before TDC and the other one just before TDC.The OH and formaldehyde LIF images were compared with the heat-release calculated from the pressure-traces. Analyses of the emissions, for example NOx and HC, were also performed for the different operating conditions.
Optical Diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and Formaldehyde
Sae Technical Papers
SAE 2005 World Congress & Exhibition ; 2005
2005-04-11
Conference paper
English
Optical diagnostics of HCCI and UNIBUS using 2D PLIF of OH and formaldehyde
Automotive engineering | 2005
|Automotive engineering | 2004
|SAE Technical Papers | 2004
|The Effect of Fuel Volatility on HCCI Using Simultaneous Formaldehyde and OH PLIF
SAE Technical Papers | 2004
|The effect of fuel volatility on HCCI using simultaneous formaldehyde and OH PLIF
Automotive engineering | 2004
|