Hydraulic lash adjuster with combined reservoir extension and metering system

Patent · Tue Jan 06 04:00:00 EST 1987

OSTI ID:6950351

Buente, S M

This patent describes a hydraulic lash adjuster for valve gear of an internal combustion engine comprising: (a) a body having a blind bore formed therein; (b) plunger means slidably received in the body bore and defining, in cooperation with the blind end of the bore, a cavity, and a fluid reservoir; (c) a one way valve means positioned at one end of the plunger means permitting fluid flow from the reservoir to the cavity; (d) the body and plunger means including port means adapted for receiving fluid under pressure, the port means communicating with the reservoir intermediate the end of the plunger means; (e) a cup shaped insert member disposed within the reservoir having an open end secured in fluid tight sealing engagement with the wall of the plunger means between the valve means and port means. The closed end of the insert is positioned in closely spaced relationship to the closed end of the plunger means and having at least one bore extending through the closed end of the insert member; (f) the closed end of the plunger means having a contact surface adapted to contact associated valve gear components and transmit periodically applied forces and a bleed orifice extending through the closed end of the plunger means and the contact surface, whereby fluid from the port means is communicated to both the insert bore and the plunger bore; (g) and, a fluid metering means associated with the closed end of the insert and with the bleed orifice to precisely meter the flow of fluid through the bleed orifice.

• Assignee: Eaton Corp., Cleveland, OH
• Patent Number(s): US 4633827
• OSTI ID: 6950351
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
GEARS
HEAT ENGINES
HYDRAULIC CONTROL DEVICES
HYDRAULIC EQUIPMENT
INTERNAL COMBUSTION ENGINES
MACHINE PARTS
METERING
OPENINGS
ORIFICES
POSITIONING
SEALS
SPACE DEPENDENCE
VALVES
VEHICLES