Chain transmission device for controlling the timing system of an internal combustion engine with two overhead camshafts
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United States of America Patent
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Jul 29, 2003
Grant Date -
Jun 27, 2002
app pub date -
Dec 22, 2000
filing date -
Apr 23, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A chain transmission device for controlling the timing system of an internal combustion engine with two overhead camshafts, and having a first chain transmission from the drive shaft to an intermediate shaft, and a second chain transmission from the intermediate shaft to both the camshafts; and wherein the first transmission defines a step-down transmission ratio between the drive shaft and the intermediate shaft; the second transmission defines a step-down transmission ratio between the intermediate shaft and the camshafts; the chain of the second transmission has a pitch smaller than the pitch of the chain of the first transmission; and the intermediate shaft is defined by the drive shaft of a fuel pump of the engine.
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