The internal combustion engine (100) has a crankcase (10) provided with a cylinder (11) in which a piston (12) is guided in a lifting movement such that a combustion chamber (13) is limited. The ignition mixture is guided from crankcase to combustion space...

Provided is a laminar-scavenging two-cycle engine, which can have a higher laminar-scavenging effect than that of the laminar-scavenging two-cycle engine of the prior art and which can expect drastically excellent effects on the stabilization of combustion...

In an insulator (21) inserted between a carburetor (30) and a cylinder (3) for a purpose of insulating heat, there are formed an intake passage (22) connected to the carburetor (30), and a pair of first air passages (23) connected to respective air flow pa...