Valve gear for use in a four cycle engine
A valve gear is described for use in a four-cycle engine having a crank shaft, an air-intake valve having a stem, and an exhaust valve having a stem comprising: (a) guide means formed by closed-curve grooves making two rounds of the outer surface of the crank shaft with one intersection on the way for controlling the movement of the air-intake valve and the exhaust valve of the engine upon rotation; (b) slider means connected to operate each valve stem under guidance of the guide means, the slider means including: a vertically elongated rod portion supported for rotary rocking and reciprocating lifting and dropping movement relative to and along the axis of a corresponding valve stem and having an upper end surface engaging a lower end surface of the corresponding valve stem; rocking means for reciprocating the rod portion and positively rotating carried thereby the rod portion in two directions opposite to each other upon rotation of the crank shaft; a rocking means comprising: a horizontal arm portion extending from one end of the elongated rod portion and rockable about a vertical axis of the slider means; and a ball rotatably supported on the tip of the arm portion and guided by the guide means providing a low friction connection with the guide means as the crankshaft rotates.
- Assignee:
- Kawasaki Jukogyo Kabushiki Kaisha
- Patent Number(s):
- US 4682573
- OSTI ID:
- 6200991
- Resource Relation:
- Patent File Date: Filed date 9 May 1986
- Country of Publication:
- United States
- Language:
- English
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