Abstract: A hydraulic roller tappet for an internal combustion engine wherein the tappet body is formed of hardenable cast iron, the roller axle is formed of a through hardened steel and wherein the axle bores in the body and the axle are dimensioned such that the axle is in floating relationship with the bores. In a preferred embodiment the axle is axially retained by retaining rings received in grooves formed in the body.

Abstract: A hydraulic lash adjusting tappet (10) for use in engine valve gear of the direct-acting type have one end of the tappet contacting the end (26) of the combustion chamber valve stem (22) and the other end contacting the camshaft lobe (16). The tappet has a body (34) formed with a tubular wall portion (36) having one end thereof closed by an end wall (38) and with a tubular hub (40) therewithin formed integrally with the end wall and extending axially therefrom. A lash adjuster assembly (44) is slidingly received in the tubular hub which defines a reaction surface (50) remote from the cam face reaction surface (18) defined by the end wall.

Abstract: A hydraulic lash adjusting tappet (10) for use in engine valve gear of the direct-acting type having one end of the tappet contacting the end (26) of the combustion chamber valve stem (22) and the other end contacting the camshaft lobe (16). The tappet has a body (34) formed with a tubular wall portion (36) having one end thereof closed by an end wall (38) and with a tubular hub (40) therewithin formed integrally with the end wall and extending axially therefrom. A lash adjuster assembly (44) is slidingly received in the tubular hub which defines a reaction surface (50) remote from the cam face reaction surface (18) defined by the end wall.

Abstract: An improved lash adjuster assembly (100) of the type featuring a plunger member (20) reciprocally moveable within a bore (44) of a body member (2) and operable to reduce back lash in a drive train of an engine valve member wherein assembly (100) includes a retainer member (66) having a side wall (74) secured to body member (92) and having radially inwardly projecting section (76) having at least a portion thereof dimensionally adapted and of sufficient resilience to minimize impact between a shoulder (68) of plunger member (20) as well as enabling plunger member (20) to be removed from body member (2) without having to remove retainer member (66) from securement thereto in addition to enabling greater reciprocal travel of plunger member (20) relative body member (2) during operation of assembly (100) particularly due to softening of at least section (76) of retainer member (66) at elevated engine temperatures.

Abstract: A reservoir height extender for a lash adjuster assembly (150) comprising an inverted hollow insert member (60) disposed in fluid reservoir chamber (42) within a plunger member (40) of assembly (150). Plunger member (40) is reciprocally moveable within a bore (38) of a body member (36) having a first fluid passageway (48) adapted to receive fluid from a fluid source and which communicates with a second fluid passageway (46) in plunger member (40) adapted to enable the fluid to flow into fluid reservoir chamber (42). Insert member (60) is displaced from a wall of plunger member (40) surrounding chamber (42) for a distance sufficient to provide a third fluid passageway (68) therebetween which communicates between passageway (46) and an opening (64) through insert member (60) that is higher than passageway (46) and which enables a substantial increase in the level of fluid within reservoir chamber (42).

Abstract: A guide (28) is provided for retrofitting an existing internal combustion engine block (10) with roller cam followers (24 and 26) in place of conventional barrel-type lifters, without modification of the block itself. The guide includes a guide bar (64), keyed to the upper body (38) of each follower to allow limited rotational freedom thereof and a resilient C-shaped spring clip (70) which simultaneously bears downwardly on the upper surface of the guide bar and upwardly on the lower surface (40) of an engine block boss (18) defining follower receiving bores (20 and 22). Annular spacers (72) are provided, if required, to displace the guide bar upwardly from the upper surface (52) of the boss. An upper leg (76) of the spring clip wraps around the guide bar for retention therewith and a lower leg (78) of the spring clip is necked at a point (86) intermediate adjacent cylindrical portions (30 and 32) of the follower boss for retention therebetween.

Abstract: A hydraulic advance device for selectively transmitting applied forces to a fuel injector of an internal combustion engine. The device is operative to select a normal or advanced timing of the fuel injection. An outer cylindrical body (66) is mounted in the upper end of a fuel injector adapter. An inner body (108) is slidably received in an outer body and a pressure responsive plunger (104) is slidably received in a bore formed in the inner body and defines in cooperation therewith a fluid chamber (128). A one-way valve (132) in the chamber permits fluid above a predetermined pressure applied during the advanced stage of the fuel injection cycle to enter the chamber which prevents movement of the plunger relative to the inner body member.

Abstract: A lash adjuster 10 is disclosed for use in engine valve gear. The adjuster includes a body 40 and a plunger 50 is slidably received in a bore 48 formed in body. A piston 63 is slidably received in the plunger and forms a high pressure chamber 86 within the plunger. A one-way valve means 72 is disposed intermediate the piston and plunger for admitting fluid to the chamber for lash adjustment. An annular retaining clip 90 is seated in a locking position in a groove 106 formed in an outer wall 104 of the plunger body. The clip extends radially beyond the end face of the hub bore 48 thereby preventing fall out of the plunger body prior to assembly in the engine valve gear.

Abstract: A hydraulic advance device for selectively transmitting applied forces to a fuel injector of an internal combustion engine. The device is operative to select a normal or advanced timing of the fuel injection. An outer cylindrical body (66) is mounted in the upper end of a fuel injector adapter. An inner body (108) is slidably received in an outer body and a reaction member (103) and pressure responsive plunger (117) are slidably received in a bore formed in the inner body. The plunger and the bore cooperate to define a fluid chamber (128). A one-way valve (132) in the chamber permits fluid above a predetermined pressure applied during the advanced stage of the fuel injection cycle to enter the chamber which prevents movement of the plunger relative to the inner body member.