Machine element or mechanism – Elements – Flywheel – motion smoothing-type
Reexamination Certificate
2006-11-14
2006-11-14
Kim, Chong H. (Department: 3682)
Machine element or mechanism
Elements
Flywheel, motion smoothing-type
C123S054400, C123S197400
Reexamination Certificate
active
07134361
ABSTRACT:
In order to suppress axial vibration in a crank system, prevent knocking sound, and reduce vibration noise, a flywheel (1) which is mounted onto the crankshaft of an engine (E) is made into a spoked form having an uneven number of spokes (5). This prevents the symmetrical bending that occurs with an even number of spokes, and divides the vibration mode in the peripheral direction. It is preferable that the number of spokes be seven. The flywheel (1) is mounted such that, when the pistons of predetermined cylinders #5and #6are at top dead center at the start of the expansion stroke, one of the spokes (5a) is positioned on the opposing side to these predetermined cylinders, which border the center of the crank (C).
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Copy of EPC Search Report for Serial No. EP 02 01 4549 dated Jul. 11, 2003.
Kimura Haruyo
Ninomiya Hiroyasu
Tamura Susumu
Isuzu Motors Limited
Kim Chong H.
McCormick Paulding & Huber LLP
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