Patent ID: 7360514
Filing Date: 2008-04-22
Classification: F02B,F02D,Y02T

Abstract:
1. A process for operating an internal combustion engine with a charging device and with an intake valve drive mechanism, said intake valve drive mechanism being variable with respect to at least one of intake valve opening time and intake valve stroke, comprising the steps of: recognizing a positive charge requirement during the operation of the charge device; upon recognition of the positive charge requirement, driving the at least one variable intake valve drive mechanism such that at least one of an available stroke reserve and an intake closure control time reserve is utilized to increase a charge amount to be charged to a cylinder of the internal combustion engine, and upon reaching a target charge predefined by the positive charge requirement, the at least one variable intake valve drive mechanism is driven to restore the at least one of the available stroke reserve and the intake closure control time reserve to an original amount of reserve existing prior to the recognizing step.