TRANSMISSION AND CONSTANT SPEED ACCESSORY DRIVE

摘要

An infinitely variable speed ratio planetary ball transmission comprising planetary members (15) in rolling contact with moveable inner (23) and outer races (26) and a constant speed accessory drive system utilizing the transmission. The transmission is infinitely variable between ratios of approximately 0.3 and 1.0. A transmission input shaft (11) is connected to a prime mover such as a vehicle engine crankshaft by a drive belt (B1). The transmission comprises at least one output shaft (22) that is coaxial with t he input shaft (11). A processor analyses the crankshaft speed and accordingly adjusts the transmission ratio using a stepper motor (96) connected to a wor m drive (90) to maintain a constant output speed regardless of crankshaft spee d.