Patent ID: 8055432
Filing Date: 2011-11-08
Classification: F02B,F02D,Y02T

Abstract:
1. A method of operating a multicylinder homogeneous charge compression ignition (HCCI) internal combustion engine across transients, comprising: taking into each of a plurality of combustion chambers a quantity of fuel and a quantity of charge-air, calculating a cylinder-specific crankshaft dynamics metric, determining the approximate maximum rate of pressure rise in the combustion chamber of each cylinder, for each combustion event, from the crankshaft dynamics metric without the use of in-cylinder pressure measurements, adjusting fuel quantity along with one or more engine state parameters, responsive to the determined maximum rate of pressure rise, in order to adjust the maximum rate of pressure rise to a target value for stable HCCI combustion, and to achieve a desired change in engine load for subsequent combustion events.