Hydraulic valve lifter

Patent · Mon Jan 12 23:00:00 EST 1987

OSTI ID:7123739

Kodama, H

A hydraulic valve lifter is described for use in a valve train of an internal combustion engine, the lifter comprising: a first cylindrical body member having an inner cylindrical wall with an inlet port extending therethrough and having a top wall adapted to be disposed in engagement with a cam shaft; an annular guide sleeve fixed in the body member in spaced relation to the cylindrical wall to define an annular space therebetween; a second cylindrical body member having a bottom wall mounted for reciprocation within the annual guide sleeve, the bottom wall adapted to be in contact with a valve stem; a plunger member mounted for reciprocation within the second body member; spring means biasing the plunger member towards the top wall; the plunger member and the second body member defining a pressure chamber; the plunger member defining a reservoir chamber therein; first fluid passage means extending between the reservoir chamber and the annular space; second fluid passage means interconnecting the reservoir chamber and the pressure chamber; check valve means associated with the fluid passage means for permitting fluid flow only from the reservoir chamber to the pressure chamber; an annular channel member having a inverted U-shaped cross section secured between the cylindrical wall and the guide sleeve and defining an oil chamber extending between the inlet port and the first fluid passage means. The guide sleeve is is comprised of a relatively thick member for obtaining rigidity and the annular channel member is made of relatively thin plate material for easy shaping and weight reduction.

• Assignee: Aisin Seiki Kabushiki Kaisha, Kariya
• Patent Number(s): US 4635593
• OSTI ID: 7123739
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
ANNULAR SPACE
CONFIGURATION
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
HEAT ENGINES
HYDRAULIC CONTROL DEVICES
HYDRAULIC EQUIPMENT
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
SHAFTS
SHAPE
SPACE
SPACE DEPENDENCE
VALVES
WEIGHT