Patent ID: 8448740
Filing Date: 2013-05-28
Classification: F16H,Y10T

Abstract:
1. An internal combustion engine including an engine case, an engine case cover, a crankshaft disposed within the engine case, an output shaft, and a transmission disposed within the engine case, the transmission configured to transmit rotation of the crankshaft of the output shaft at a modified speed, the transmission comprising: a plurality of speed change gears which are selectively combinable, a selected combination of gears determining an output speed of the engine, and a transmission driving mechanism which is operable to shift gears within the transmission to obtain a desired selected combination of gears, the transmission driving mechanism comprising: a shift spindle rotatably supported on the engine case such that a first end of the shift spindle extends through the engine case cover and protrudes outside the engine case cover, the shift spindle operably connected to the gears such that rotating the shift spindle changes the selected combination of gears, a turning angle sensor operatively attached to a second end of the shift spindle, a shift actuator operably connected to the first end of the shift spindle to drive rotation of the shift spindle, a fitting part formed at the protruding first end of the shift spindle and configured to receive a working end of a manual turning tool fitted thereon, wherein: