Institut Francais Du Pe'trole

Xavier Gautrot

Gaétan Monnier

Laurent Simonet

Gaëtan Monnier

A method for detecting abnormal combustion in the combustion chamber of at least one cylinder of a spark-ignition supercharged internal-combustion engine includes:

Abnormal combustion detection method for internal-combustion engines

The present invention relates to a method of controlling the intake of a supercharged engine comprising a cylinder () with at least two intake pipes () associated with their intake valves () and connected to an intake distributor (), and at least one exhaust pipe () with its exhaust valve (), a method according to which, before the end of the exhaust phase of said engine, an exhaust gas scavenging operation is carried out by overlap of exhaust valve () and intake valve () and, at the end of the scavenging operation, a stage of fuel mixture preparation is performed for combustion of this mixture in said cylinder. According to the invention, the method consists in introducing supercharged air from a first zone () of the intake distributor to carry out the scavenging operation, in using supercharged air from a second zone () of the distributor to produce a fuel mixture for the cylinder and, after the end of the intake phase, in sending to this second zone () part of the fuel mixture contained in the cylinder.

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Rueil Malmaison, France

Xavier Gautrot