摘要:
A valve actuation assembly is disclosed for use on an internal combustion engine. The assembly includes a cam follower (20) having a follower body (26). The follower body has an upper head portion (30) and is configured to receive a pair of spaced rollers (64) therein. The rollers are mounted on shafts (66) in the follower body and extend outwardly from the head portion to engage corresponding spaced cam surfaces (22) of a rotatable camshaft (14) for actuating the valve lifter and, consequently, an associated engine valve. The head portion of the follower body cooperates with the inner sidewalls (88) of the rollers to define a space (80) therebetween for straddling a radially outwardly extending spacer (78) mounted for rotation on the camshaft between the spaced cam surfaces. The side surfaces of the outwardly extending spacer are operable with corresponding sidewalls of the rollers to prevent rotation of the cam follower relative to the camshaft.
摘要:
An assembly (10) and method is disclosed for making a cam shaft from a plurality of cam lobes (14) having apertures (16) disposed therethrough and a hollow tubular shaft (12). The assembly (10) comprises a support arrangement (18) for supporting the cam lobes (14) along the hollow shaft (12); a solid or liquid propellant (20) disposed within the shaft; and a deflagrator (22) for deflagrating the propellant to introduce a sudden increase of gas pressure in the hollow tubular shaft (12) to expand the shaft radially and into engagement with the cam lobes (16) thereby securing the cam lobes to the shaft and preventing movement therebetween. The propellant (20) is disposed axially along the length of the shaft (12) to promote even radial expansion of the shaft. The propellant (20) is distributed evenly along the length of a thick plastic tube (24) which is inserted in the shaft (12).
摘要:
Die Erfindung betrifft ein Kurvengetriebe mit einer an einer Steuerkurve (7) abrollenden Tastrolle (9), mittels welcher ein Getriebeglied (8) in eine erste und eine zweite Funktionsstellung verlagerbar ist, wobei einer jeweiligen der beiden Funktionsstellungen ein auf der Steuerkurve (7) gelegener Kontaktpunkt (P1, P2) entspricht. Aufgrund fertigungsbedingter Maßabweichungen weisen derartige Getriebe Übersetzungsfehler auf, die mit der Erfindung reduziert werden sollen. Hierzu ist vorgesehen, daß ein in der ersten Funktionsstellung des zweiten Getriebeglieds (8) mit dem ersten Kontaktpunkt (P1) zusammenfallender Punkt der Lauffläche (13) der Tastrolle (9) in der zweiten Funktionsstellung des Getriebeglieds (8) zumindest im wesentlichen mit dem zweiten Kontaktpunkt (P2) zusammenfällt.
摘要:
Assembly of a cylindrical body (3) manufactured to finished dimensions, particularly a shaft, with at least one component (4-11) manufactured to finished dimensions and mounted around the cylindrical body (3), in particular a cam. The inside bore (44) of the annular component (4-11) has at least two axially separate annular zones (Z) which give a play-free transition fit on the cylindrical body (3) and are separated from each other by recessed areas (21) in the inside bore (44) or in the cylindrical body (3), and are symmetrical to the radial central plane (X) of the annular component (4-11). At the edge of the cams there is preferably at least one collar (19) for fitting securing means.
摘要:
A device for distributing oil in a camshaft of an internal combustion engine comprises a cylindrical insert (4) which extends axially in the camshaft (1) and which conveys two separate streams of oil in the camshaft (1). The insert (4) has a central oil (5) channel for an oil stream and a cavity (7) for a second oil stream which forms part of the device between the insert (4) and the camshaft (1). Both oil streams are conveyed to or from the camshaft in radial channels (15, 16).
摘要:
A lightweight composite camshaft (20) has stamped sheet metal or other lightweight journal and cam elements (14,22) having locating hubs (18,23) assembled onto a hollow tube (11).