Cycle-to-Cycle Variation Study of an SI Engine Fired by Spark Plug and a Non Conventional Device

Paper #:
  • 972986

Published:
  • 1997-10-01
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.
Pages:
8
Abstract:
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.
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