INTERNAL COMBUSTION ENGINE AND CRANK MECHANISM Russian patent published in 1994 - IPC

FIELD: mechanical engineering. SUBSTANCE: pair of opposite cylinders 2 is secured to crankcase 1. Cylinders 2 are provided with movable bushings 3 having bottoms 4 and heads 5. Pistons 6 are received in bushings 3 between heads 5 and bottoms 4 to form working 7 and under-piston 8 chambers of alternative volume. Crankcase 1 is provided with crank 9 having crankpin and journals 11 which is coupled with bottom 4 of one of bushings 3 trough, e.g connecting rod 12. Rockers 13 are freely mounted in journals 11. At the first version one arm of rockers 13 is pivotally connected to bushings 3 interconnected rigidly and the other arm is connected with pistons which are also rigidly interconnected. At the second version piston of each cylinder 2 is rigidly connected to bushing 3 of opposite cylinder 2. One arm of rocker 13 is pivotally connected to one pair of piston-bushing and the other with the other pair. Crank mechanism has crank 9 with a crankpin and journals 11, pivoting member, e.g. connecting rod with a head, and eccentric rigidly connected with the crankpin and mounted eccentrically with respect to its axis. Inner diameter of head 2 is grater than maximum distance between generatrices of cylindric surfaces of the crankpin and journals 11. As the result the head can be non- detachable. EFFECT: improved design. 12 cl, 7 dwg