Patent ID: 6314923
Filing Date: 2001-11-13
Classification: F02B

Abstract:
An internal combustion engine comprising:first and second pistons fixed with respect to one another with heads facing each other, each said piston having a valved exhaust line intersecting with said head of said piston;first and second sleeves encircling said respective first and second pistons, each said sleeve having a closed end generally opposite said respective piston head, said first and second sleeves forming respective first and second intake spaces with said first and second pistons;first and second inlet check valves for allowing flow of air into said first and second intake spaces;a cylinder mounted on said pistons for reciprocal movement, said cylinder having an internal pressure boundary forming first and second combustion chambers with said respective first and second pistons, and said cylinder having first and second peripheral ends sealed with said respective first and second pistons and with said first and second sleeves forming first and second variable volume induction/compression areas in said first and second intake spaces, and said cylinder having first and second passages connecting said respective first and second intake spaces with said second and first combustion chambers when said cylinder is moved adjacent an extreme position toward said first and second pistons to deliver compressed air to said second and first combustion chambers.