| 摘要 |
The present invention relates to a method of scavenging the residual burnt gas of a direct-injection supercharged multi-cylinder internal-combustion engine (10), notably of diesel type, running under partial loads, with a piston moving in a reciprocating motion between a top dead center (PMH) and a bottom dead center (PMB), wherein a burnt gas scavenging stage is carried out by means of a sequence of opening/closing at least one exhaust valve (18) during engine exhaust phase (E) and of at least one sequence of opening/closing at least one intake valve (28) during this exhaust valve opening/closing sequence. According to the invention, the method consists, during the scavenging stage, in controlling the closing time of intake valve (28) so as to cause a decrease in exhaust pressure (Pe) in order to achieve a pressure differential between intake pressure (Pa) and exhaust pressure (Pe) favourable to intake pressure (Pa).
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