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US 2016/0258478 A1Published application
Connecting rod and internal combustion engine
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorMichael Paul
Life of this patent
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AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorMichael Paul
Estimating the term…
A connecting rod (10) has a big end bearing eye (11) for attachment to a crankshaft, a small end bearing eye (12) for attachment to a piston, and an eccentric adjusting device (13) for adjusting an effective connecting rod length. The eccentric adjusting device (13) has eccentric rods (15, 16) that engage on an eccentric lever (14), an eccentric (36) that is guided in an aperture in the eccentric lever (14) and in the small end bearing eye (12) and an aperture for accommodating a piston pin (37). Lubricating oil bores (38, 39) are introduced into the small end bearing eye (12) via which a lubricating oil film can be built up between the small end bearing eye (12) and the eccentric (36). The small end bearing eye (12) has a larger radial wall thickness in those regions in which the lubricating oil bores (38, 39).
A connecting rod, having a big end bearing eye for attachment to a crankshaft, a small end bearing eye for attachment to a piston of a cylinder, and an eccentric adjusting device for adjusting an effective connecting rod length, the eccentric adjusting device having eccentric rods that engage on an eccentric lever of the eccentric adjusting device, and the eccentric adjusting device having an eccentric that is guided in an aperture in the eccentric lever and in the small end bearing eye and that has an aperture for accommodating a piston pin, lubricating oil bores being introduced into the small end bearing eye via which a lubricating oil film can be built up between the small end bearing eye and the eccentric, the small end bearing eye having a larger radial wall thickness in those regions in which the lubricating oil bores are introduced into said bearing eye than in adjoining regions of said bearing eye.
An internal combustion engine which has an adjustable compression ratio, having at least one cylinder and having a crankshaft, on which at least one connecting rod engages, wherein the at least one connecting rod has a big end bearing eye attached to the crankshaft, a small end bearing eye attached to a piston of the at least one cylinder and an eccentric adjusting device for adjusting an effective connecting rod length, the eccentric adjusting device having an eccentric that interacts with an eccentric lever, and eccentric rods that engage on the eccentric lever and are acted upon by a hydraulic pressure prevailing in hydraulic chambers interacting with the eccentric rods, lubricating oil bores being introduced into the small end bearing eye via which a lubricating oil film can be built up between the small end bearing eye and the eccentric, the small end bearing eye having a larger radial wall thickness in those regions in which the lubricating oil bores are introduced into said bearing eye than in adjoining regions of said bearing eye.
Dependencies are inferred from the claim text.