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    • 70. 发明专利
    • INTERNAL COMBUSTION ENGINE
    • JPH0626359A
    • 1994-02-01
    • JP16476692
    • 1992-06-23
    • ISE MUNEMITSU
    • ISE MUNEMITSU
    • F02B41/04F02B75/32F16J1/10
    • PURPOSE:To improve transmission efficiency to a crankshaft by providing a gear part, the external teeth of which are meshed with the internal teeth of a ring body provided at the rotary shaft of a crankshaft, concentrically with a crankpin, and fitting the large end part of a connecting rod to the outer periphery of an eccentric part rotated integrally with the gear part. CONSTITUTION:A ring body 7 concentric with a main crankshaft 4a is fixed to the inner surface of a crankcase 5, and the gear part 6b of a displaced body 6 is meshed with the internal gear of the ring body 7. The displaced body 6 is fitted to the outer periphery of a crankpin 4c, and the gear part 6c is concentric with the crankpin 4c. The large end part 8a of a connecting rod 8 is fitted to the outer periphery of the eccentric part 6a of the displaced body 6. The gear part 6b autorotates being meshed with the ring body 7 and revolves along the inner periphery of the ring body 7. The decentered direction of the eccentric part 6a from the crankpin 4c, an internal/external gear ratio, and the like are thus determined appropriately so as to enlarge an explosion stroke range and thereby to improve the transmission efficiency of energy to a crankshaft.