Patent ID: 6467440
Filing Date: 2002-10-22
Classification: F02B

Abstract:
A two stroke internal combustion engine comprising first power cylinder with a first piston reciprocally movable therein and an intake ports and second power cylinder with a second piston reciprocally movable therein and an exhaust ports, said pistons being connected each to its own crank, with the crank of the second piston having advanced crank angle against the crank of the first piston, enabling advanced opening and closing of the exhaust port in relation to the intake port, said cylinders being double-sided, with upper power cavities and lower power cavities on the opposite sides of the pistons, said cavities interconnected by passages in pairs, with lower power cavities separated from cranks by a transverse partition, and the intake ports of power cavities of the first cylinder connected to a source of scavenging and supercharging, with improvements, including said crank of the second piston having additional advancement of 180Â° against the crank of the first piston, providing movement of said pistons in opposition to each other, and said passages interconnecting lower power cavity of the first cylinder with upper power cavity of the second cylinder and upper power cavity of the first cylinder with lower power cavity of the second cylinder.