Connecting rod
AssigneeDaimler-Benz Aktiengesellschaft
InventorsMichael Kramer, Karlwalter Schmidt
Life of this patent
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Abstract
In a connecting rod of a piston machine which comprises two separate parts which are longitudinally movable relative to one another but operatively interconnected and of which one part is connected to the piston and the other is rotatably mounted on the crank of a crankshaft, the two connecting rod parts are interconnected by a fluid spring structure in which a fluid is utilized as a spring element for operatively interconnecting the connecting rod parts.
Claims14
A connecting rod for transmitting energy between a piston structure and a crankshaft of a piston machine, said connecting rod comprising two connecting rod parts which are movable relative to one another in longitudinal direction but are operatively interconnected by an energy storage device, one of said connecting rod pangs being connected to said piston structure by a piston bearing structure supported by said piston structure and the other of said connecting rod parts being a tubular body and having at its end a crank bearing support structure with a crank bearing for rotatably mounting said other connecting rod part on a crankshaft, said energy storage device being a fluid spring utilizing a fluid disposed in said connecting rod as a spring, said fluid spring includeing a delay structure effective in the operating direction of said fluid spring and comprising a disc, slidably disposed in said tubular body and defining a leakage flow passage providing for communication between said hollow space and said pump space and being calibrated so as to permit a predetermined leakage flow for limiting fluid flow from one side of said tubular body to the other.
A connecting rod for transmitting energy between a piston bearing structure and a crankshaft of a piston machine having a pressurized oil lubricating system, said connecting rod comprising two connecting rod parts which are movable relative to one another in longitudinal direction but are operatively interconnected by an energy storage device, one of said connecting rod parts being connected to said piston bearing structure by a piston pin disposed in said piston bearing structure and the other of said connecting rod parts having at its end a crank bearing support structure with a crank bearing for rotatably mounting said other connecting rod part on said crankshaft, said energy storage device being a fluid spring formed by said connecting rod parts which are filled with oil from said oil lubricating system of said piston machine, said connecting rod parts forming a hollow space in communication with a crank bearing pocket by way of an oil bore in said crank bearing support structure and a pump space in communication with a piston pin bearing pocket by way of an oil passage in said piston pin bearing, such that oil supplied through an oil supply passage in the crankshaft is supplied from said crankshaft to said piston pin bearing through said fluid spring, and a check valve being provided in said oil bore adjacent said hollow space to prevent return flow of oil from said hollow space to said crankshaft.
Dependencies are inferred from the claim text.