Apparatus utilizing a plural-profiled cam unit for actuating the valve of an internal combustion engine
An apparatus is described for operating a reciprocable valve assembly associated with a combustion cylinder of an internal combustion engine comprising an axially-fixed camshaft having a central axis, first cam means mounted on the camshaft for rotation. The first cam means having a first base circle portion, and first and second ramp portions, the first ramp portion are connected at one end of the first base circle portion and extending in one direction away from the first base circle portion and gradually increasing in radius in the one direction. The second ramp portion is connected at one end to the first base circle portion and extends in an opposite direction away from the first base circle portion and gradually increasing in radius in the opposite direction. The second cam means has a second base circle portion of the same radius as the first base circle portion. A lobe portion radially extends from the central axis a first distance and connects third and fourth ramp portions. The third ramp portion extends in the one direction away from the second base circle portion and gradually increases in radius in the one direction. The fourth ramp portion extends in the opposite direction away from the second base circle portion and gradually increases in radius in the opposite direction. The first cam means has an outermost radial distance less than the first distance and follower means provides a single working surface engageable by both of the first and second cam means. The lobe portion and the third and fourth ramp portions of the second cam means engage a different portion of the single working surface of the follower means from that engaged by the first and second ramp portions of the first cam means.
- Assignee:
- Investment Rarities, Inc., Minneapolis, MN
- Patent Number(s):
- US 4683848
- OSTI ID:
- 6396983
- Resource Relation:
- Patent File Date: Filed date 30 Mar 1984
- Country of Publication:
- United States
- Language:
- English
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