The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Optical Diagnostics of HCCI and UNIBUS Using 2-D PLIF of OH and Formaldehyde

På svenska

Author

Summary, in English

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.

Publishing year

2005

Language

English

Publication/Series

SAE technical paper series

Document type

Journal article

Publisher

Society of Automotive Engineers

Topic

  • Other Mechanical Engineering
  • Atom and Molecular Physics and Optics

Keywords

  • Combustion Engines optical diagnostics Formaldehyde

Status

Published