Patent ID: 6899077
Filing Date: 2005-05-31
Classification: F02D,F02M,Y02T

Abstract:
1. A method for operating an internal combustion engine having a crankshaft and wherein fuel is injected directly into a combustion chamber of the engine and an air/fuel mixture, which is present in the combustion chamber, is ignited by an ignition device, the method comprising the steps of: for a cold engine, during a start phase, providing a first injection per work cycle with the first revolutions of said crankshaft to generate an essentially homogeneous combustible air/fuel mixture in said combustion chamber; thereafter, in the same work cycle, providing a second injection to generate an essentially rich air/fuel mixture in the region of said ignition device; and, making the lambda value of the air/fuel mixture generated by said second injection in the region of said ignition device less than the lambda value of the air/fuel mixture present in the remainder of said combustion chamber.