A multi-zone model of the CFR engine : investigating cascading autoignition and octane rating

The CFR engine is the standardised research engine used for the measurement of knock resistance of fuels through the Research Octane Number (RON) and Motor Octane Number(MON) tests. In standard production engines, knock manifests as an almost instantaneous pressure rise followed by knock ringing" pressure oscillations of similar magnitude. However, knock in the CFR engine is characterised, and measured by, a steep, but more gradual pressure rise, followed by ringing of much lesser magnitude. It has been previously proposed that a cascading autoignition", resulting from an in-cylinder temperature gradient, is responsible for this unique pressure development.

Grantor dc:publisher.institution

Department of Mechanical Engineering

Year dc:date.issued

2011

Author dc:creator

• Perumal, Marlan

Advisor dc:contributor.advisor

• Floweday, Gareth

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/11357

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/11357