Engine crankshaft assemblies with gear interfaces
AssigneeGM Global Technology Operations LLC
InventorsSuman Bargav R, Durga Prasad Kandula, Peng Chen
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Abstract
A crankshaft assembly includes a crankshaft body extending along an axis of rotation. The crankshaft body includes bearing journals that are mutually coaxial with the axis of rotation and spaced from each other along a length of the crankshaft body and crankpins that are spaced from each other along the length of the crankshaft body and axially offset from the axis of rotation. The crankshaft body also includes crank webs projecting radially from the axis of rotation and interconnecting the bearing journals and the crankpins and a flange extending from a distal end of the crankshaft body having a conical gear engaging surface.
Claims20
A crankshaft assembly, comprising:
- a crankshaft body extending along an axis of rotation including:
- a plurality of bearing journals mutually coaxial with the axis of rotation and spaced from each other along a length of the crankshaft body;
- a plurality of crankpins spaced from each other along the length of the crankshaft body and axially offset from the axis of rotation;
- a plurality of crank webs projecting radially from the axis of rotation and interconnecting the bearing journals and the crankpins;
- and
- a flange extending from a distal end of the crankshaft body having a conical oil pump gear engaging surface, wherein the flange includes a first axially facing surface and a second axially facing surface and the first axially facing surface and the second axially facing surface face opposite axial directions.
A method of manufacturing a crankshaft assembly, the method comprising:
- forming a crankshaft body along an axis of rotation, the crankshaft body including:
- a plurality of bearing journals mutually coaxial with the axis of rotation and spaced from each other along a length of the crankshaft body;
- a plurality of crankpins spaced from each other along the length of the crankshaft body and axially offset from the axis of rotation;
- a plurality of crank webs projecting radially from the axis of rotation and interconnecting the bearing journals and the crankpins;
- and
- a flange extending from a distal end of the crankshaft body having a conical oil pump gear engaging surface, wherein the flange includes a first axially facing surface and a second axially facing surface and the first axially facing surface and the second axially facing surface face opposite axial directions.
A motor vehicle comprising:
- a vehicle body;
- a plurality of road wheels rotatably attached to the vehicle body;
- and
- an internal combustion engine (ICE) assembly attached to the vehicle body and operable to output engine torque to one or more of the road wheels to thereby propel the motor vehicle, the ICE assembly having an engine block defining a plurality of cylinder bores, a plurality of pistons each reciprocally movable within a respective one of the cylinder bores, and a crankshaft assembly including:
- a crankshaft body extending along an axis of rotation;
- a plurality of bearing journals mutually coaxial with the axis of rotation and spaced from each other along a length of the crankshaft body;
- a plurality of crankpins spaced from each other along the length of the crankshaft body and axially offset from the axis of rotation;
- a plurality of crank webs projecting radially from the axis or rotation and interconnecting the bearing journals and the crankpins;
- and
- a flange extending from a distal end of the crankshaft body having a conical oil pump gear engaging surface, wherein the flange includes a first axially facing surface and a second axially facing surface and the first axially facing surface and the second axially facing surface face opposite axial directions.
Dependencies are inferred from the claim text.