Patent ID: 7461633
Filing Date: 2008-12-09
Classification: F02D,Y02T

Abstract:
1. A method of controlling the combustion of an internal-combustion engine, in particular a direct-injection supercharged engine, notably of gasoline type, wherein the engine includes at least one cylinder with a fuel supply means and an intake means with an intake valve as well as an exhaust means with an exhaust valve, said cylinder comprising a combustion chamber within which takes place a compression stage, followed by a stage of combustion of a fuel mixture by a spark-ignition means, characterized in that it consists in: measuring a quantity related to at least one parameter representative of the state of the fuel mixture during said stages, determining a value that depends on the amplitude of the measured quantity, comparing the determined value with at least one threshold value representative of the quantity related to said parameter representative of the conventional state of the fuel mixture during said stages, detecting the start of an abnormal combustion when the determined value exceeds said threshold value and when the ignition means is not actuated, controlling the course of the abnormal combustion detected in the combustion chamber.