| 摘要 |
A compression ratio variable and expansion ratio variable apparatus (200) is mounted on a crank shaft (100) and a piston connecting rod assembly (5) of an internal combustion engine. The compression ratio variable and expansion ratio variable apparatus (200) comprises an execution motor (1), a worm (2), a worm gear (3), a central gear (4), a first transmission shaft (21), a plurality of transmission shafts (22, 23, 24), a first eccentric bushing (51), a plurality of eccentric bushings (52, 53, 54), a first eccentric bushing front gear (61), a plurality of eccentric bushing front gears (63, 65, 67), a first eccentric bushing rear gear (62), a plurality of eccentric bushing rear gears (64, 66), a planetary gear (31), a first transmission shaft rear gear (32), a plurality of transmission shaft front gears (33, 35, 37), and a plurality of transmission shaft rear gears (34, 36, 38). A first supporting cylindrical hole is disposed on a neck of a first main shaft, and an axis of the first main shaft and an axis of the crank shaft form an included angle. A supporting cylindrical hole is disposed on a neck of each of a plurality of first main shafts, and axes of the main shafts and the axis of the crank shaft are overlapped, or parallel but not overlapped, or form in a non-zero included angle. The compression ratio variable and expansion ratio variable apparatus (200) implements the change of the stroke length of the internal combustion engine, thereby changing the compression ratio and the expansion ratio of the internal combustion engine. |
