Patent ID: 7089891

Claim:
A two-cycle combustion engine, which comprises: a cylinder block having a cylinder bore defined therein and accommodating therein a reciprocating piston, said piston cooperating with the cylinder bore to define a combustion chamber; a crankcase having a crank chamber defined therein and accommodating therein a crankshaft of the engine, said cylinder block being fixedly mounted on the crankcase with the cylinder bore communicated with the crank chamber; said crankshaft being rotatably supported by the crankcase by means of a bearing; and a scavenging path having a plurality of pairs of scavenging passages defined in part within the cylinder block and in part within the crankcase for supplying an air-fuel mixture from the crank chamber into the combustion chamber, each pair having two scavenging passages confronting to each other, at least one of the scavenging passages having a lower end portion extended to a position where it is held in face-to-face relation with an outer end face of the bearing, such that the air-fuel mixture within the crank chamber is introduced into such scavenging passages mainly through the bearing, thereby to mix and atomize the air-fuel mixture by rotation of the bearing.