F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
F01L 1/14 (2006.01) F01L 1/25 (2006.01)
Patent
CA 2074414
A hydraulic valve clearance compensating arrangement for an internal combustion engine includes a clearance compensating element which is axially movable up and down in a cylindrical lifter guide. The element includes first and second hollow cylinders which are mutually sealed and axially elastically supported on each other by a compression spring. A substantially cup shaped housing concentrically surrounds the cylinders. The housing has a flat housing base and at least one lubricant delivery opening in its outer circumference. The first hollow cylinder and the lubricant delivery opening are connected for the exchange of liquid. The lubricant delivery opening is provided with a first check valve at the side of the opening which is located towards the hollow cylinders for permitting the flow of lubricant through the opening towards the first hollow cylinder and blocking a back flow of lubricant from the first hollow cylinder through the opening. The housing, in at least a section of its outer circumference, has an outer diameter which decreases towards the housing base starting in the region of the delivery opening. This provides for a wedge-shaped gap between the housing and the cylindrical lifter guide and an automatic filling of the clearance compensating element with lubricant. Valve clicking during start-up of the engine is prevented and special lubricant supply bores in the cylinder head are obviated.
Borden Ladner Gervais Llp
Freudenberg Carl
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