Browse Publications Technical Papers 2007-01-3614
2007-08-05

Expansion of Premixed Compression Ignition Combustion Region by Supercharging Operation and Lower Compression Ratio Piston 2007-01-3614

Various premixed diesel combustion concepts are suggested as the way of simultaneous reduction of NOx and PM emission from diesel engines. However, every combustion concept has common problems, such as difficulty of ignition timing control, a great deal of HC and CO emissions and limiting the operation region to low load operation.
The purpose of this study is to expand the operation region of Premixed Compression Ignition (PCI) combustion, which is a premixed diesel combustion concept that realizes the fuel injection around the top dead center. As a result of examining it with EGR, supercharging operation and low compression ratio piston, PCI combustion region was expanded to cover higher load operation. And the high load region was limited by not only stoichiometric air fuel ratio but also permissible maximum in-cylinder pressure.

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