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US 9,670,952 B2Granted
Length-adjustable con rod
AssigneeAVL List GmbH
InventorsHelmut Melde-Tuczai, Bernhard Hoedl, Andreas Zurk, Wolfgang Schoeffmann
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AssigneeAVL List GmbH
InventorsHelmut Melde-Tuczai, Bernhard Hoedl, Andreas Zurk, Wolfgang Schoeffmann
Estimating the term…
The invention relates to a length-adjustable con rod (1) for a reciprocating piston engine, particularly an internal combustion engine, having at least a first and a second rod part (2, 4), wherein the two rod parts (2, 4) can be pushed together and/or inside one another in a telescoping manner, wherein the second rod part (4) forms a guide cylinder (4a) and the first rod part (2) a piston element (3) which can be pushed longitudinally in the guide cylinder (4a), wherein a high-pressure chamber (4b), into which at least one oil channel (10) opens, is clamped between the first and the second rod parts (2, 4). To enable the compression ratio to be adjusted in the simplest and most reliable manner possible, according to the invention the two rod parts (2, 4) can be fixed, by a locking device (32), relative to one another in at least one position, preferably corresponding to a minimum length of the con rod (1).
A length-adjustable connecting rod for a reciprocating piston engine, comprising at least a first and a second rod part, which two rod parts can be pushed together and/or inside one another in a telescopic manner, wherein the second rod part forms a guide cylinder and the first rod part a piston element which is longitudinally displaceable in the guide cylinder, wherein a high-pressure chamber is spanned between the first and the second rod part, into which at least one first oil duct opens, wherein the two rod parts can be fixed by a locking device relative to one another in at least one position, wherein at least one valve is arranged in the first oil duct and the valve is a control valve, wherein at least one filling borehole can be controlled by an actuating piston of the control valve, and wherein the filling borehole is activated in a second position of the actuating piston and is closed in a first position of the actuating piston.
A length-adjustable connecting rod for a reciprocating piston engine, comprising at least a first and a second rod part, which two rod parts can be pushed together and/or inside one another in a telescopic manner, wherein the second rod part forms a guide cylinder and the first rod part a piston element which is longitudinally displaceable in the guide cylinder, wherein a high-pressure chamber is spanned between the first and the second rod part, into which at least one first oil duct opens, wherein the two rod parts can be fixed by a locking device relative to one another in at least one position, wherein the locking device comprises a movable stop element which is displaceably arranged transversely to a longitudinal axis of the connecting rod in a transverse borehole of the piston element, and wherein the stop element comprises at least one wedge surface which is inclined with respect to a normal plane on the longitudinal axis of the connecting rod and which cooperates with a counter surface of the piston element.
A length-adjustable connecting rod for a reciprocating piston engine, comprising at least a first and a second rod part, which two rod parts can be pushed together and/or inside one another in a telescopic manner, wherein the second rod part forms a guide cylinder and the first rod part a piston element which is longitudinally displaceable in the guide cylinder, wherein a high-pressure chamber is spanned between the first and the second rod part, into which at least one first oil duct opens, wherein the two rod parts can be fixed by a locking device relative to one another in at least one position, wherein at least one valve is arranged in the first oil duct, and wherein the valve is arranged with an actuating piston which is axially displaceable in a receiving borehole and which is displaceable to a first position by a restoring spring and to a second position by oil pressure against the force of the restoring spring.
Dependencies are inferred from the claim text.