Crank drive for e.g. petrol engine of motor vehicle, has middle pistons connected directly with fork connecting rod, and external piston hinged to oscillating arm, universal joint and fork connecting rod by short lever

摘要

The drive has a set of cylinders (8) provided with an external piston (5) and middle pistons (6) that are connected with a crankshaft (1). The crankshaft carries only one cam pin, and the middle pistons are connected directly with a fork connecting rod (2). The external piston is hinged to an oscillating arm (3), a universal joint (7) and the fork connecting rod by a short lever (4).