Eaton Corporation

David P Clark

Bryce A Buuck

Stephen M Buente

John Page Chapman

William T Mihalic

John L Eustis

A hydraulic lash adjuster which is mounted in a rocker arm of an internal combustion engine. The plunger of the lash adjuster has a socket formed therein which receives a cylindrical member having a ball end in contact with the socket and a flat surface engageable with a poppet valve of the engine. The ball and socket connection is lubricated by engine oil flowing from the leakdown clearance space between the plunger and the lash adjuster body through a passage which intersects the socket surface. The plunger and the cylindrical member are retained within the body by a single, dish-shaped member which is positioned over the body.

Hydraulic lash adjuster

A retrofit roller bearing pivot assembly for a rocker arm of an internal combustion engine valve gear. A mounting stud or post threaded on one end for attachment to the engine has a fulcrum member received thereover and registered against a head formed thereon with transversely extending oppositely disposed cylindrical bearing surfaces. A roller bearing race is received on each of the bearing surfaces and a semi-cylindrical sleeve member has the post received therethrough and has concave portions on opposite ends thereof journalled on the fulcrum bearing surfacers. The sleeve is retained against the bearings by a spring clip received over the end of the post and engaging ledges on the sleeve. The fulcrum is retained in registration on the post by a contoured supporting spacer held in place by a suitable snap ring received over the post threads. The assembly is sized to drop between the side wall of a cupped rocker arm.

Rocker arm pivot assembly

A hydraulic lash adjusting tappet for an internal combustion engine of the type supplying oil to a passage communicating with the tappet-receiving guide bore in the engine. The tappet has a roller follower on the cam end and a registration means adjacent the opposite end for orienting the roller with respect to the engine cam. The tappet body has at least one localized collector recess disposed longitudinally coincident and peripherally spaced with the registration means. In one embodiment the registration comprises a pair of oppositely disposed flats and the tappet has a pair of diametrically opposed collector recesses interconnected by a peripheral groove spaced longitudinally therefrom to by-pass the flats and provide sufficient surface for leakage control. An oil inlet hole is formed in one of the collector recesses for supplying the lash adjuster valve in the tappet. The localized recess is aligned with the engine supply passage by the orientation of the registration surface.

Roller follower hydraulic tappet

The manifold cross-over control valve includes a powdered metal mounting base (10) which is mounted in a bore in a cross-over passage of an intake manifold (B). A frame (40) which extends into the cross-over passage from the mounting base seals against passage around its periphery and defines an exhaust gas aperture (42) therethrough. A pin (70) mechanically fastens the frame to the mounting base. A butterfly plate (80) is mounted on rotatable shaft (90) adjacent the frame for selectively opening and closing the exhaust gas aperture. The pin engages the butterfly plate in its fully open position to limit its rotational movement. A pneumatic actuator (D) is mounted by a bracket (30) to the mounting base for selectively rotating the shaft to control the passage of exhaust gases through the cross-over control valve.

Manifold cross-over control valve

A valve selector including a telescoping spring capsule subassembly having a dual retainer ring arrangement for limiting the maximum extended length thereof. A cup-shaped spring retaining member has an internal groove formed near its rim and a cup-shaped spring receiving member has an external groove formed near its outer open end. The spring retaining member is partially received over the spring receiving member with the external groove axially aligned over the internal groove. A compression spring is captured between the opposed bottom surfaces of the retainer members. An inner retaining ring is received in the external groove and an outer retaining ring is received in the internal groove. The outer ring has an internal diameter sized less than the outer diameter of the inner retaining ring for providing a radial overlap condition. The maximum spacing of the spring receiving and spring retaining members is limited by abutment of adjacent axial faces of the inner and outer retaining rings.

Spring retainer-valve selector

A valve selector rotary latch mechanism is provided having an improved locating clip (46, 47) for aligning a telescoping spring capsule subassembly (38, 40) relative to the position of a rotary acting blocker plate (41, 42) and a mounting bracket (36) which connects a solenoid actuator (31) through a linkage (43, 44) to the blocker plates. The locater clip is formed of a resilient spring steel and includes a folded-over horizontal portion (77, 78) which is connected by means of a flared eyelet (66) through the mounting bracket and a looped portion (88) which extends beyond the bracket with an end tap (90) thereof being in locking engagement with a notch (74, 76) formed in the side wall of the telescoping spring capsule subassembly. A locking tab (80) is formed on the end of the folded-over portion and extends into an opening in the bracket for preventing rotation of the clip as the valve selector is assembled to the engine cylinder head. A downwardly extending tab (98, 100) formed on the bracket extends into a channel (92) formed adjacent the end of the looped portion and functions to position the locater clip relative to the blocker plate and the mounting bracket.

Valve selector module assembly

A means for selecting one of a plurality of predetermined amounts of the lost-motion lash in the valve gear of an engine while the engine is running. A latchable mechanism in the valve gear is movable from a first position providing predetermined normal low level lash to a second position providing a predetermined substantially greater lash for reducing the effective lift of the cam and shortening of the valve event. A unique cam profile provides a period of linear lift of substantially constant low velocity, both during lash take-up on valve opening to prevent high velocity clash of valve gear components and during valve closing to prevent high velocity seating of the valve.

Growing community of inventors

Battle Creek, MI, United States of America

David P Clark