Study on heat losses during flame impingement in a diesel engine using phosphor thermometry surface temperature measurements

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceeding


In-cylinder heat losses in diesel engines decrease engine efficiency significantly and account for approximately 14-19% [1, 2, 3] of the injected fuel energy. A great part of the heat losses during diesel combustion presumably arises from the flame impingement onto the piston. Therefore, the present study investigates the heat losses during flame impingement onto the piston bowl wall experimentally. The measurements were performed on a full metal heavy-duty diesel engine with a small optical access through a removed exhaust valve. The surface temperature at the impingement point of the flame was determined by evaluating a phosphor's temperature dependent emission decay. Simultaneous cylinder pressure measurements and high-speed videos are associated to the surface temperature measurements in each cycle. Thus, surface temperature readings could be linked to specific impingement and combustion events. The results showed a sharp increase of the surface temperature during the flame impingement and an abrupt decrease as the flame disappeared.


Enheter & grupper
Externa organisationer
  • Scania CV AB

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik
Titel på värdpublikationTechnical Paper - WCX SAE World Congress Experience
FörlagSociety of Automotive Engineers
StatusPublished - 2019 apr 2
Peer review utfördJa
EvenemangSAE World Congress Experience, WCX 2019 - Detroit, USA
Varaktighet: 2019 apr 92019 apr 11


NamnSAE Technical Papers
FörlagSociety of Automotive Engineers
ISSN (tryckt)0148-7191


KonferensSAE World Congress Experience, WCX 2019
Förkortad titelWCX 19