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US 2011/0256970 A1Published application
Chain tensioner
AssigneeTsubakimoto Chain Co.
InventorsYoshikazu Nakano, Kohei Kunimatsu
Life of this patent
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Abstract
In a hydraulic tensioner, a tensioner housing is provided with an oil outflow channel communicating with a high pressure oil chamber formed by a plunger and the tensioner housing. A control valve in the oil outflow channel can be adjusted manually or automatically to optimize the damping performance of the tensioner in different engines and under different operating conditions, thereby obviating individualized machining of tensioner components to achieve optimum damping.
Claims5
A chain tensioner, comprising:
- a tensioner housing in which a cylindrical plunger-accommodating hole is formed said hole having an opening in a wall of the tensioner housing;
- a cylindrical plunger slidable in said plunger-accommodating hole and protruding therefrom through said opening in a protruding direction, the plunger and said plunger-accommodating hole cooperatively forming a high pressure oil chamber;
- and
- biasing means for biasing the plunger in said protruding direction;
- wherein the tensioner has an oil inflow channel through which oil can be supplied to said high pressure oil chamber, and an oil outflow channel through which oil can be discharged from said high pressure oil chamber;
- and
- wherein the tensioner includes a control valve for controlling the amount of oil discharged through said oil outflow channel.
4 more elements
Dependencies are inferred from the claim text.