Connecting rod for piston engine

A twin crankshaft piston engine with at least one piston-cylinder-unit with a piston that can be moved back and forth within a cylinder and two crankshafts synchronized to rotate in opposite directions to one another, wherein the piston is coupled to the first crankshaft via a first connecting rod and to the second crankshaft via a second connecting rod, each of the first and second connecting rods including

• a first connecting rod head that comprises a first connecting rod eye for mounting the connecting rod to the piston;
• a second connecting rod head that comprises a second connecting rod eye for mounting the connecting rod to a crankpin of the associated crankshaft of the piston engine;
• and
• a connecting rod shank that links the first connecting rod head with the second connecting rod head,
• the connecting rod shank comprising a narrow first connecting rod shank section adjacent to the first connecting rod head,
• the connecting rod shank comprising a second connecting rod shank section adjacent to the second connecting rod head,
• the first connecting rod shank section and the second connecting rod shank section merging into one another in a transition section,
• wherein said first connecting rod shank section has a cross-section of solid material,
• wherein a length L of the first connecting rod shank section is measured from a lower edge of the first connecting rod head to a boundary between the first connecting rod shank section and the transition section,
• wherein a length L′ of the second connecting rod shank section is measured from an upper edge of the second connecting rod head to a boundary between the second connecting rod shank section and the transition section,
• said boundaries being defined by a change in angle in the side contour of the shank,
• the length L of said narrow first connecting rod shank section being equal to or less than the length L′ of said second connecting rod shank section,
• the second connecting rod shank section being wider than the narrow first connecting rod shank section,
• wherein a width b of the narrow first connecting rod shank section measured at said boundary between the narrow first connecting rod shank section and the transition section is narrower than a width b′ of the second connecting rod shank section measured at said boundary between the second connecting rod shank section and the transition section,
• wherein said transition section has a width which gradually decreases in the direction of a longitudinal extension of said connecting rod shank from said width b′ of said second connecting rod shank section to said width b of said narrow first connecting rod shank section,
• a width of the narrow first connecting rod shank section being narrower in a region where it merges with the first connection rod head than an exterior diameter of the first connecting rod head.

A connecting rod for a piston engine comprising

• a first connecting rod head that comprises a first connecting rod eye for mounting a connecting rod to a piston of the piston engine;
• a second connecting rod head that comprises a second connecting rod eye for mounting said connecting rod to the crankpin of a crankshaft of the piston engine;
• and
• a connecting rod shank that links the first connecting rod head with the second connecting rod head,
• the connecting rod shank comprising a narrow first connecting rod shank section adjacent to the first connecting rod head and
• the connecting rod shank comprising a second connecting rod shank section adjacent to the second connecting rod head,
• the first connecting rod shank section and the second connecting rod shank section merging into one another in a transition section,
• said first connecting rod shank section having a cross-section of solid material,
• wherein a length L of the first connecting rod shank section is measured from a lower edge of the first connecting rod head to a boundary between the first connecting rod shank section and the transition section,
• wherein a length L′ of the second connecting rod shank section is measured from an upper edge of the second connecting rod head to a boundary between the second connecting rod shank section and the transition section,
• said boundaries being defined by a change in angle in the side contour of the shank,
• the length L of said narrow first connecting rod shank section being equal to or less than the length L′ of said second connecting rod shank section,
• the second connecting rod shank section being wider than the narrow first connecting rod shank section,
• wherein a width b of the narrow first connecting rod shank section measured at said boundary between the narrow first connecting rod shank section and the transition section is narrower than a width b′ of the second connecting rod shank section measured at said boundary between the second connecting rod shank section and the transition section,
• wherein said transition section has a width which gradually decreases in the direction of a longitudinal extension of said connecting rod shank from said width b′ of said second connecting rod shank section to said width b of said narrow first connecting rod shank section,
• a width of the narrow first connecting rod shank section being narrower in a region where it merges with the first connection rod head than an exterior diameter of the first connecting rod head,
• wherein the width of said second connecting rod shank section decreases at a first inclination angle to a plane E, which links the axes of the connecting rod eyes, emanating from a transition region, in which the second connecting rod shank section merges into the second connecting rod head, in the direction towards said narrow first connecting rod shank section.

A connecting rod for a piston engine comprising

• a first connecting rod head that comprises a first connecting rod eye for mounting a connecting rod to a piston of the piston engine;
• a second connecting rod head that comprises a second connecting rod eye for mounting said connecting rod to the crankpin of a crankshaft of the piston engine;
• and
• a connecting rod shank that links the first connecting rod head with the second connecting rod head,
• the connecting rod shank comprising a narrow first connecting rod shank section adjacent to the first connecting rod head,
• the connecting rod shank comprising a second connecting rod shank section adjacent to the second connecting rod head,
• the first connecting rod shank section and the second connecting rod shank section merging into one another in a transition section,
• said first connecting rod shank section having a cross-section of solid material,
• wherein a length L of the first connecting rod shank section is measured from a lower edge of the first connecting rod head to a boundary between the first connecting rod shank section and the transition section,
• wherein a length L′ of the second connecting rod shank section is measured from an upper edge of the second connecting rod head to a boundary between the second connecting rod shank section and the transition section,
• said boundaries being defined by a change in angle in the side contour of the shank,
• the length L of said narrow first connecting rod shank section being equal to or less than the length L′ of said second connecting rod shank section,
• the second connecting rod shank section being wider than the narrow first connecting rod shank section,
• wherein a width b of the narrow first connecting rod shank section measured at said boundary between the narrow first connecting rod shank section and the transition section is narrower than a width b′ of the second connecting rod shank section measured at said boundary between the second connecting rod shank section and the transition section,
• wherein said transition section has a width which gradually decreases in the direction of a longitudinal extension of said connecting rod shank from said width b′ of said second connecting rod shank section to said width b of said narrow first connecting rod shank section,
• a width of the narrow first connecting rod shank section being narrower in a region where it merges with the first connection rod head than an exterior diameter of the first connecting rod head,
• wherein the width of said second connecting rod shank section decreases at a first inclination angle to a plane E, which links the axes of the connecting rod eyes, emanating from a transition region, in which the second connecting rod shank section merges into the second connecting rod head, in the direction towards said narrow first connecting rod shank section,
• wherein the width of said transition section decreases at a second inclination angle to said plane E, wherein said second inclination angle is steeper than said first inclination angle with respect to plane E.