The Impact of Combustion Phasing on Cycle-by-Cycle Performance of a Spark Ignition Engine

950687

02/01/1995

Event
International Congress & Exposition
Authors Abstract
Content
Cycle-by-cycle pressure data have been recorded for a spark ignition engine operating over a wide range of steady state and perturbed running condition. The data base has been analysed to derive mass fraction burnt, pressure development and work mean effective pressure characteristics for individual cycles. Cross-correlation coefficients have been calculated to identify predominant relationships. The effect of combustion phasing on cross-correlation coefficients is particularly significant and three regimes of behaviour have been identified. These are associated with early, optimal and late cases. The cross-correlations between parameters derived from cycle-by-cycle data do not uniformly reflect trends seen between cycle-averaged values of these. Auto-correlation results have been examined for interactions between successive cycles with less success, although, again combustion phasing can have a significant influence on the strength of auto-correlation coefficients.
Meta TagsDetails
DOI
https://doi.org/10.4271/950687
Pages
15
Citation
Stevens, S., Shayler, P., and Ma, T., "The Impact of Combustion Phasing on Cycle-by-Cycle Performance of a Spark Ignition Engine," SAE Technical Paper 950687, 1995, https://doi.org/10.4271/950687.
Additional Details
Publisher
Published
Feb 1, 1995
Product Code
950687
Content Type
Technical Paper
Language
English