Title: The mechanism of an engine hybrid combustion concept with controlled auto ignition and spark ignition
Abstract: Controlled Auto Ignition (CAI) uses the internal energy of
the compressed charge to auto-ignite the mixture. Using
internal exhaust gas re-circulation (IEGR) as an indirect
control method, CAI offers superior fuel economy and
pollutant emission reductions. Practically, this can readily
be achieved by a method of early exhaust valve closure
and late inlet valve opening to trap a large quantity of
exhaust gas residuals within the cylinder from one cycle
to the next. Although the emission and fuel economy can
be largely improved, the engine power output is limited to
part-load conditions only. At high-load, conventional
Spark Ignition (SI) is required. In this research, both SI
and CAI and the transition between the two were
investigated on a single-cylinder research engine
equipped with Lotus’ Research Active Valve Train (AVT)
System. It was found that the potential hybrid combustion
concept is consisted of four regions: conventional spark
ignition combustion, spark ignition controlled auto
ignition, spark ignition assisted auto ignition, spark
ignition free controlled auto ignition.
Publication Year: 2003
Publication Date: 2003-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 1
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