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.