Patent ID: 7588019
Filing Date: 2009-09-15
Classification: F02D,Y02T

Abstract:
1. A method of operating an internal combustion engine, especially a gasoline engine with direct gasoline injection, in a controlled self-ignition, whereby the internal combustion engine includes a combustion chamber, at least one intake valve and at least one exhaust valve, whose opening times are changeable, an adjustable exhaust gas recirculation, and a gas mixture capable of ignition, which contains residual gas, which is compressed in the combustion chamber during a compression stroke, whereby the gas mixture self-ignites toward the end of the compression stroke, the method comprising moving the residual gas into the combustion chamber by using internal and external exhaust gas recirculation, wherein a base rate of the exhaust gas recirculation is provided by the external exhaust gas recirculation, which remains unchanged for more than one working cycle, wherein an auxiliary rate of residual gas is added to the base rate from the internal exhaust gas recirculation.