Patent ID: 7210449
Filing Date: 2007-05-01
Classification: F02B,F02D,Y02T

Abstract:
1. A method for controlling an internal combustion engine, comprising: pre-compressing air fed to the combustion chambers of the internal combustion engine by a boosting device; setting a valve overlap of gas exchange valves of the internal combustion engine by a variable camshaft displacement; determining a quantity of fuel requiring to be injected for homogeneous operation of the internal combustion engine and injected directly into the combustion chambers of the internal combustion engine, dividing the quantity of fuel to be injected into two partial quantities; injecting a first partial quantity into the intake stroke and a second partial quantity is injected into the compression stroke; dividing a ratio with which the two partial quantities is determined as a function of the load range of the internal combustion engine and when the internal combustion engine is operating close to full load the valve overlap is set in such a way that fresh air is flushed toward the exhaust gas side of the internal combustion engine and the ratio with which the two partial quantities are divided is determined via the ratio of the mass of air remaining in the cylinder of the internal combustion engine to the total mass of air taken in during a working cycle.