ACCESSORY DRIVE BELT TRANSMISSION SYSTEM FOR AUTOMOBILE AND V-RIBBED BELT USED FOR THE SAME
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United States of America Patent
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Issued Date -
Aug 21, 2014
app pub date -
Dec 23, 2013
filing date -
Feb 21, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
When the rotational speed of an engine 11 is equal to or higher than 4000 rpm, the rotational fluctuation ratio of a crank shaft pulley 13 at an outer circumferential surface thereof is sometimes equal to or greater than 6%. Moreover, in the layout in which a V-ribbed belt 20 is wound on a plurality of pulleys 14, 15, at least one of span lengths is equal to or longer than 220 mm. The V-ribbed belt 20 includes a back reinforcement fabric.
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