Planetary Gear Set To Provide Speed Control For Belt-Driven Engine Accessory
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United States of America Patent
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Issued Date -
Nov 19, 2015
app pub date -
May 14, 2014
filing date -
May 14, 2014
priority date (Note) -
Abandoned
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Abstract
A method of controlling the operating speed of an engine accessory driven by a belt connected to an engine crankshaft. A planetary gear set is interposed between the belt and the accessory, the planetary gear set having a planet gear carrier, at least one planet gear, a sun gear, and a ring gear. The sun gear is connected to an input mechanism of the accessory. The planet gear carrier is connected to the belt, via a pulley. The ring gear is connected to a generator. An excitation current is applied to the generator, which loads and slows the ring gear. This excitation current can be varied to provide a desired operating speed of the accessory.
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