Patent ID: 6754575
Filing Date: 2004-06-22
Classification: F02D,Y02T

Abstract:
A method for determining at least one of cylinder air charge and cylinder burned gas for an internal combustion engine system, such engine system including cylinders, each one of such cylinders having at least one intake valve and at least one exhaust valve in communication with such cylinder, such method comprising:determining one of a plurality of different scenarios, each one of the scenarios representing a geometrical relationship between opening and closing of the intake valve relative to closing of the exhaust valve; calculating the at least one of the cylinder air charge and cylinder burned gas in accordance with the determined one of the plurality of scenarios; and wherein the engine system includes a memory, such memory storing a plurality of different software modules, and wherein the method includes: selecting one of the plurality of software modules in accordance with the determined one of the plurality of scenarios; and wherein the calculating of the at least one of the cylinder air charge and cylinder burned gas comprises executing the selected one of the modules.