Institut Francais Du Pe'trole

Gaétan Monnier

Pierre Leduc

Alexandre Pagot

Xavier Gautrot

Laurent Simonet

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

A method for controlling a supercharged engine, that includes determining an overlap of valves by opening a supercharged non-fuel-containing air inlet valve and closing an exhaust valve before the exhaust phase of an engine cylinder and in the vicinity of the top dead center (TDC), actuating a blocking means for blocking a supercharged non-fuel-containing air intake means to admit supercharged air flowing in the supercharged non-fuel-containing air intake means into a chamber to scavenge residual burned gases when a pressure of the supercharged non-fuel-containing air is greater than a pressure of the exhaust gases, and actuating the blocking means to shut off the supercharged air flowing from the supercharged non-fuel-containing intake means into the chamber when pressure of the supercharged non-fuel-containing air is less than pressure of the exhaust gases.

Method for controlling a supercharged engine, particularly an indirect injection engine, and engine using such a method

A supercharged internal-combustion engine has at least two cylinders with a combustion cycle during which a cylinder () of the engine is in the intake phase with burnt gas scavenging in the vicinity of the top dead center (TDC) thereof while another cylinder is in the exhaust phase in the vicinity of the bottom dead center (BDC) thereof, the cylinders having at least one intake () with an intake valve () and at least one exhaust () with an exhaust valve (). Controlling the engine includes carrying out scavenging of the burnt gases of the cylinder in the intake phase by a valve overlap stage by opening simultaneously its exhaust () and intake () valves, and controlling opening of exhaust valve () of the cylinder in the exhaust phase so that, during at least part of the overlap stage, the exhaust pressure (Pe) of the cylinder in the intake phase is lower than its intake pressure (Pa).

Method of controlling a supercharged internal-combustion engine with at least two cylinders and engine using such a method

A combustion method for a supercharged four-stroke engine having at least four cylinders includes a combustion cycle during which a cylinder of the engine is in the exhaust phase while another cylinder is in the supercharged air intake phase with a burnt gas scavenging stage. The start of the exhaust phase of the cylinder in the exhaust phase is shifted in relation to the start of the burnt gas scavenging stage of the cylinder in the intake phase.

Growing community of inventors

Rueil Malmaison, France

Gaétan Monnier