Cycle-to-Cycle Variation Study of an SI Engine Fired by Spark Plug and a Non Conventional Device 972986
This paper reports on an experimental investigation of an SI single cylinder engine cycle-to-cycle variations. Two different ignition devices are studied: a spark plug and a non conventional ignition device, PJC (Pulsed Jet Combustion).
In-cylinder pressure is analyzed via a complete heat release rate computation.
A significant decrease in IMEP cycle-to-cycle variations can be achieved only when the initial burning rate is enhanced with PJC device for example. The cycle-to-cycle combustion variations (CA01, PMax, IMEP) are not improved in the same proportions.
The PJC is a firing device which meets the objective of repeatable ultra-lean mixture ignition and development of combustion, but slightly lowers the global efficiency due to the increase of heat losses for high load running points.
Citation: Robinet, C., Andrzejewski, J., and Higelin, P., "Cycle-to-Cycle Variation Study of an SI Engine Fired by Spark Plug and a Non Conventional Device," SAE Technical Paper 972986, 1997, https://doi.org/10.4271/972986. Download Citation
C. Robinet, J. Andrzejewski, P. Higelin
University of Orleans
International Fuels & Lubricants Meeting & Exposition
Preparing Mixtures for Diesel and SI Engines-SP-1305