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US 2018/0320731 A1Published application
Length-Adjustable Connecting Rod
AssigneeAVL List GmbH
InventorsHelmut Melde-Tuczai, Siegfried Hartwig
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AssigneeAVL List GmbH
InventorsHelmut Melde-Tuczai, Siegfried Hartwig
Estimating the term…
The invention relates to a length-adjustable connecting rod (1) for a reciprocating piston machine, comprising at least one first rod part (2) with a small connecting rod eye (3) and at least one second rod part (4) with a large connecting rod eye (5), both rod parts (2, 4) being movable in relation to each other or inside each other in a telescoping manner. The second rod part (4) comprises a guide cylinder (8) and the first rod part (2) is securely connected to a piston element (7) that can move longitudinally in the guide cylinder (8), a first high-pressure chamber (10) being mounted on a first side of the piston element (7) between the second rod part (4) and the piston element (7), and a second high-pressure chamber (12) being mounted on a second side of the piston element (7), at least one sealing element (22, 24) being provided for sealing at least one high-pressure chamber (10, 12). The aim of the invention is to allow a wear-resistant seal between the two rod parts (2, 4) as easily, compactly and reliably as possible. To this end, the piston element (7) is non-positively connected to the first rod part (2) by means of an interference fit (30) in a interference-fit region (30a).
A length-adjustable connecting rod (1) for a reciprocating engine, in particular an internal combustion engine, comprising at least one first rod part (2) with a small connecting rod eye (3) and at least one second rod part (4) with a large connecting rod eye (5), which two rod parts (2, 4) are movable in relation to each other and/or inside each other in a telescoping manner in the direction of a longitudinal axis (1a) of the connecting rod (1), wherein the second rod part (4) comprises a guide cylinder (8) and the first rod part (2) is fixedly connected to a piston element (7) that can move longitudinally in the guide cylinder (8), wherein a first high-pressure chamber (10) is defined on a first side of the piston element (7) between the second rod part (4) and the piston element (7), and a second high-pressure chamber (12) is defined on a second side of the piston element (7), wherein each high-pressure chamber (10, 12) is flow-connected to at least one oil passage (15, 16), wherein at least one sealing element (22, 24) is provided for sealing at least one high-pressure chamber (10, 12), and wherein the piston element (7) is non-positively connected to the first rod part (2) via an interference fit (30) in a press-fit region (30a).
Dependencies are inferred from the claim text.