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AssigneeINA-Schaeffler KG
InventorCathleen Rutsey
Estimating the term…
The invention concerns a valve train (1) of an internal combustion engine comprising a tappet (2) and a hollow tappet pushrod (3) that is actuated by this tappet. The tappet pushrod comprises on one end (4), a first support (5) for an at least indirectly contacting pressure piston (6) of a hydraulic lash adjuster (7) of the tappet (2) that is actuated by a cam. A second support (9) for a follower member (10) (rocker arm), is arranged on a further end (8) of the tappet pushrod (3). The first support (5) comprises a passage (11) for hydraulic medium that can be routed out of the pressure piston (6) during operation of the internal combustion engine into an interior (12) of the tappet pushrod (3). The second support (9) comprises a passage (13) for the hydraulic medium to the follower member (10). A one-way valve body (14) is arranged in the interior (12) of the tappet pushrod (3). This one-way valve body is axially freely displaceable between its valve seat (15) facing the first support (5) and a disc-like stop (16) facing the second support (9). The stop (16) comprises circumferentially spaced through-openings (17), such that when the one-way valve body (14) comes to bear against the stop (16), a choked flow of hydraulic medium takes place toward the second support (9). In this way, the tappet pushrod (3) can be used as an additional oil reservoir.
A valve train of an internal combustion engine comprising a tappet and a hollow tappet pushrod that is actuated by said tappet, said tappet pushrod comprising on one end, a first support for an at least indirectly contacting pressure piston of a hydraulic lash adjuster of said tappet that follows a periodic driving element, typically a cam, a second support for a follower member, typically a rocker arm, being arranged on a further end of the tappet pushrod, said first support comprising a passage for hydraulic medium that can be routed out of the pressure piston during operation of the internal combustion engine into an interior of the tappet pushrod, and the second support comprising a passage for the hydraulic medium to the follower member, wherein a one-way valve body is arranged in the interior of the tappet pushrod and extends for free axial displacement between a complementary valve seat facing the first support and a stop for the one-way valve body, typically a disc, facing the second support, which stop comprises at least one through-opening such that, when the one-way valve body comes to bear against the stop, a choked flow of hydraulic medium takes place toward the second support.
A valve train of an internal combustion engine comprising a tappet and a hollow tappet pushrod that is actuated by said tappet, said tappet pushrod comprising on one end, a first support for an at least indirectly contacting pressure piston of a hydraulic lash adjuster of said tappet that follows a periodic driving element, typically a cam, a second support for a follower member, typically a rocker arm, being arranged on a further end of the tappet pushrod, said first support comprising a passage for hydraulic medium that can be routed out of the pressure piston during operation of the internal combustion engine into an interior of the tappet pushrod, and the second support comprising a passage for the hydraulic medium to the follower member, wherein a one-way valve body is arranged in the interior of the tappet pushrod and is biased toward a complementary valve seat facing the first support by a spring means, typically at least one coil compression spring, whose further end, proximate to the second support, is supported on a collar projecting into the interior of the tappet pushrod, a choked flow of hydraulic medium taking place between an outer peripheral surface of the one-way valve body and one of an inner peripheral surface of the tappet pushrod or an inner peripheral surface of a component connected to the tappet pushrod.
Dependencies are inferred from the claim text.