Crankshaft drive for an internal combustion engine
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United States of America Patent
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Dec 22, 1998
Grant Date -
N/A
app pub date -
Dec 12, 1996
filing date -
Dec 22, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A crankshaft drive in an internal combustion engine, which comprises at least one cylinder having a cylinder head, and a crankcase housing a crankshaft rotating at a predetermined direction and at a predetermined speed, and a balance shaft extending parallel to the crankshaft and rotating at the predetermined speed of the crankshaft in a direction opposite to the predetermined rotating direction of the crankshaft, the crankshaft and the balance shaft carrying balance weight means for balancing a mass of first order. An auxiliary shaft extends parallel to the crankshaft and rotates at the predetermined speed of the crankshaft in the predetermined rotating direction of the crankshaft, the auxiliary shaft carrying a counterweight for balancing a residual moment resulting from the rotating balance shaft with respect to the rotating crankshaft.
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