Phase changing mechanism for camshaft of internal combustion eng

Details Phase changing mechanism for camshaft of internal combustion eng Phase changing mechanism for camshaft of internal combustion eng

1996-10-18

1997-11-18

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 123 9034, 74568R, 464 2, F01L 1300

Patent

active

056876815

ABSTRACT:
A phase changing mechanism is disclosed which is applicable to a valve gear of a dual overhead camshaft internal combustion engine. The mechanism comprises a driving shaft, a cam rotatable relative to the driving shaft, a drive member fixed to the driving shaft, a driven member integral with the cam, a support, an intermediate member rotatablly supported in an eccentric circular cam integral with the support, a first coupling coupling the drive member with the intermediate member at a first position spaced from an axis of the driving shaft, and a second coupling coupling the driven member with the intermediate member at a second position angularly spaced from the first position with respect to the shaft axis. The first coupling has a movable connection with the intermediate member to permit variation in a distance of the first position from an axis of rotation of the intermediate member during operation. The second coupling has a movable connection with the intermediate member to permit variation in a distance of the second position from the axis of rotation of the intermediate member during operation. The support is rotatably supported by at least one of the drive and driven members.

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