Valve gear for four-cycle engine

Patent · Tue Feb 02 04:00:00 EST 1988

OSTI ID:5422189

Fujikawa, T; Hirata, M; Ueki, N

A valve gear unit adapted for use with a four cycle engine having valves is described comprising: a monolithic crankshaft which includes output shafts, chrankwebs and a crankpin; a valve guide portion on the each crankweb of the crankwebs, the valve guide portions being positioned and arranged on the crankwebs to surround the crankshaft and having a shape to fold back around the cranshaft and an intersection to return back to a starting point in two turns of the cranskshaft; and interlocking means for coupling the engine valves to an associated one of the valve guide portions. The guide portions are formed as guide grooves each having a concave side wall and a convex side wall, and the interlocking means having a follower having a flat portion maintaining a sliding contact with the convex wall of the guide groove, and a convex portion maintaining a sliding contact with the concave side wall of the guide groove, the convex portion having a convex radius of curvature which is slightly smaller than the minimum radius of curvature of the guide-groove, and the guide groove being designed in such a manner that portions of one complete inner circle and in the vicinity of the intersection are made from two outer and inner walls between which the follower slides, and the rest being made only from an inner wall on which the follower slides.

• Assignee: Kawasaki Jukogyo Kabushiki Kaisha
• Patent Number(s): US 4722306
• OSTI ID: 5422189
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
DESIGN
ENGINES
EQUIPMENT
FASTENERS
FLOW REGULATORS
GEARS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
SHAFTS
VALVES