Investigation into Occurrence of Megaknock and Auto-Ignition in GTDI Engines Ford Motor Company

Format:

Conference/Event

Author/Creator:

Khosravi, Khosravi, author.

Contributor:

Lorenz, Thomas

Ruhland, Helmut

Weber, Carsten

Conference Name:

WCX 17: SAE World Congress Experience (2017-04-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2017

Summary:

AbstractThe performance of boosted gasoline engines is limited at high loads by knock, stochastic Low Speed Pre-Ignition, and Megaknock. An investigation has been carried out on the occurrence of abnormal combustion and megaknock in a 1.6 L GTDI engine with the aim to determine the causes of such phenomena. A classification of abnormal combustion events and causes is presented in order to facilitate a consistent terminology. The experiments specifically focus on the effects of exhaust residual gas on occurrence of megaknock in multi-cylinder engines. The results showed that while a misfire will not lead to megaknock, a very late combustion in one cycle, in one cylinder may lead to megaknock in the following cycle in the same or adjacent cylinder. Additionally, a recently developed multi-zone model was used to analyze the role of residual gas on auto-ignition. It was found that residual gas from a late combustion event may in fact lead to auto-ignition in the following cycle; the composition of the residual gas and the presence of partially burned hydrocarbon species were found to be critical

Notes:

Vendor supplied data

Publisher Number:

2017-01-0690

Access Restriction:

Restricted for use by site license