METHOD FOR SCANNING REDISOUS BURN GASES BY DOUBLE LIFTING OF VALVES FOR A TWO-STROKE ENGINE, IN PARTICULAR OF A DIESEL TYPE

摘要

The present invention relates to a method for scavenging the residual burnt gases contained in the combustion chamber (14) of a two-stroke internal combustion engine, at least one exhaust manifold (24) controlled by an exhaust valve. (26), air intake channels (32) in which circulates intake supercharged air and opening into said chamber by lights (34). According to the invention, the method consists: during the expansion / exhaust / intake phase of the engine, to perform at least one opening / closing sequence of the exhaust valve (26) before the introduction of the air supercharged in the combustion chamber, - performing at least one opening / closing sequence of the exhaust valve (26, 26 ') after the start of the introduction of the air and before the end of the introduction of this air so as to perform the scanning of residual burnt gases contained in the combustion chamber.