Autotensioner
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jul 7, 2005
app pub date -
Dec 28, 2004
filing date -
Jan 5, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In an autotensioner 16 used in an auxiliary drive system A1 for a multicylinder engine 1 configured to suspend cylinder operation, a damper 24 is provided to suppress the vibration of an arm 18 by means of the viscous drag of a magnetorheological fluid (MRF). The damper 24 is provided with an electromagnet 34 which applies magnetic force to the MRF. When some of the cylinders in the running engine 1 are suspended from working, the electromagnet 34 of the damper 24 is excited in response to a signal from an engine controller 38 to apply the magnetic force to the MRF, thereby increasing the viscous drag of the MRF and suppressing the vibration of the arm 18 or a belt span 13a. In this manner, the vibration of the arm 16 of the tensioner 16 and the belt span 13a is suppressed to prevent the occurrence of an unusual sound and the loss of life of a belt 13.
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