Patent ID: 7219649
Filing Date: 2007-05-22
Classification: F02D,F02M,Y02T

Abstract:
1. A method of operating an engine system comprising the steps of: apportioning a predetermined total amount of fuel injected into at least one combustion chamber into at least a first amount of fuel and a second amount of fuel; injecting the first amount of fuel into the at least one combustion chamber during non-auto ignition conditions; when the engine system is in a mid-low engine load range, injecting the second amount of fuel, being one of equal to or less than 15% of the predetermined total amount of fuel, into the at least one combustion chamber during auto-ignition conditions; and when the engine system is in a high engine load range, injecting the second amount of fuel, being greater than 15% of the predetermined total amount of fuel, in the at least one combustion chamber during auto-ignition conditions.