Two-cycle engine with separate lubricating system
AssigneeSanshin Kogyo Kabushiki Kaisha
InventorsYoshihito Oyama, Kenji Ikeda, Masami Ohara
Life of this patent
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Abstract
A lubricating system for use in a two-cycle engine having at least one valve pivotally mounted through bearings in the sidewall of an intake passage of a carburetor is disclosed which supplies lubricating oil directly on the sidewall of the intake passage to lubricate the valve bearings in order to prevent corrosion and sticking of the valve. The lubricating oil is delivered into the intake passage directly on the sidewalls upstream of the bearings so that the lubricating oil flows along these walls to assure adequate flow to the bearings. The lubricating oil may be delivered into the intake passage by supplying the oil directly through at least one of the bearings of the valve.
Claims18
A lubricating system for a two-cycle engine having a carburetor including at least one air/charge flow control valve rotatably mounted through at least one bearing arranged within at least one sidewall of a longitudinally extending air/charge intake passage of the carburetor, comprising:
- an oil tank;
- an oil pump;
- means for actuating the oil pump;
- supply line means connecting said oil tank and said oil pump;
- output line means extending from said oil pump, terminating in said sidewall and opening into said intake passage upstream from and along an imaginary longitudinal line extending through said at least one bearing.
A lubricating system for a two-cycle engine having a carburetor including at least one air/charge flow control valve rotatably mounted through at least one bearing arranged within at least one sidewall of a longitudinally extending air/charge intake passage of the carburetor, comprising:
- means for supplying liquid lubricant directly to said at least one sidewall upstream from and along an imaginary longitudinal line extending through said at least one bearing.
A method of lubricating a carburetor throttle plate valve bearing associated with a longitudinally extending air/charge passage of a carburetor of a two-cycle engine comprising supplying lubricating oil directly to the upper sidewall area of the carburetor air/charge passage at a point upstream of the throttle plate valve and along an imaginary longitudinal line extending through the bearing during engine operation and causing the oil to flow along the sidewall across the bearing and into the charge supply port of the engine.
Dependencies are inferred from the claim text.