Chain tensioner
AssigneeNissan Motor Co., Ltd.
InventorsKimitsugu Kiso, Shigeru Okamura
Life of this patent
Estimating the term…
Abstract
A chain tensioner comprises a body which is received in a bore formed through a side wall of a chain case, and includes a generally cylindrical portion. A plunger is slidably received in the cylindrical portion so as to press a timing chain. A check valve is arranged in the body. A damping chamber is defined by the cylindrical portion and the plunger, and is fluidly communicated with an oil pump via an oil supply passage. On the other hand, an oil reservoir is defined by the bore and the body, and is fluidly communicated with the damping chamber through the check valve via an oil passage, and also with the damping chamber via a flow restrictor.
Claims16
An engine comprising:
- a chain tensioner body formed with a cylindrical bore having one end closed;
- a plunger slidably defining within said cylindrical bore, said plunger defining within said cylindrical bore a variable volume chamber;
- means for defining an oil reservoir;
- one-way passage means for allowing a one-way flow of oil from said oil reservoir to said variable volume chamber, but preventing the reverse flow;
- said oil reservoir defining means including,
- a predetermined engine component part with a mounting site;
- said chain tensioner body cooperating with said predetermined engine component part at said mounting site to define therebetween said oil reservoir.
Dependencies are inferred from the claim text.