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US 2006/0219199 A1Published application
Switching element
AssigneeINA-Schaeffler KG
InventorsNobert Geyer, Peter Sailer, Oliver Schnell
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AssigneeINA-Schaeffler KG
InventorsNobert Geyer, Peter Sailer, Oliver Schnell
Estimating the term…
A switch element (1) is proposed for valve shut-off, fabricated as cam follower for a plunger rod valve drive of an internal combustion engine, having an outer part (2) and an inner element (4) axially movable in its bore (3) and with rotational security (15) relative to the guided inner element (4). The outer part (2), inside the bore (3), has an annular groove (6), and the inner element (4) has a radial bore (7) with two diametrically opposed pistons (8), which to couple the elements (2, 4) in their axially remote relative position achieved by a lost-motion spring (5) are displaceable towards the annular groove (6). On their cam-side under side, emanating from their radially outward, bulbous face, the pistons (8) segmentwise comprise a plane transverse surface as contact area for a facing under side (27) of the annular groove (6). The latter is intersected by two diametrically opposed oil ports (11) running offset 90° from the pistons (8) in circumferential direction. In addition, the outer part (2) has means (13) for rotationally secured guidance of the switch element (1) relative to a surrounding structure.
A switch element for valve shut-off, fabricated as a cam follower for a plunger rod valve drive of an internal combustion engine, the switch element comprising an outer part and an inner element axially movable in the bore thereof and guided vis-à-vis the outer part by way of an anti-rotation safety element, the outer part having an annular groove inside the bore and the inner element having a radial bore with two diametrally opposed pistons that are displaceable into the annular groove, to couple the outer part and inner element in their relative positions achieved via a lost-motion spring, wherein the pistons have a planar surface as a contact area to face an under side of the annular groove, the annular groove is intersected by at least one oil port offset in a circumferential direction from the pistons, the outer part has an anti-rotation guidance component for anti-rotation guidance of the switch element relative to a surrounding structure, and wherein a hydraulic clearance equalization element having a pressure system is installed in the inner element.
A switch element for a valve drive of an internal combustion engine, the switch element comprising:
Dependencies are inferred from the claim text.