Phase control mechanism
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 1, 2002
Grant Date -
N/A
app pub date -
Sep 20, 2000
filing date -
Sep 22, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A phase control mechanism for adjusting the phase relationship between a cam shaft and a crank shaft and an internal combustion engine is disclosed, to enable variable valve timing within the engine. The mechanism is disposed between crank shaft (203) and cam shaft (202) and comprises a pulley (204) which is integrally connected to a bevel gear (216). Bevel gears (224) are supported in the cage (220) which is integrally coupled to the cam shaft (202). A control gear (210) meshes with the bevel gears (224) and the control gear (210) is connected to a shaft (208) which may be driven by a stepper motor (215) which drives the shaft (208) via a gear (209). Rotation of the gear (210) causes the gears (224) to advance or regress relative to the gear (214) and therefore relative to the pulley (204) and crank shaft (203) so as to change the valve timing of the engine.
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