Crankpin including cams, connecting rod including followers, and internal combustion engine including crankpin and connecting rod

摘要

A crankshaft may include first and second journals having circular cross-sections, and a crankpin, the crankpin extending between first and second crankpin journals. The crankpin may include first, second, and third cams including respective first, second, and third cam profiles, wherein the first, second, and third cam profiles differ from one another. At least one of the first, second, and third cam profiles may be configured to affect the stroke of a connecting rod coupled to the crankpin. A connecting rod may include first, second, and third followers including respective first, second, and third follower surfaces, wherein the first and second follower surfaces differ from one another. An internal combustion engine may include a crankshaft and a connecting rod configured to provide relative linear movement between a crankpin axis and a proximal end of the connecting rod.

主权项

1. A crankshaft for an internal combustion engine, the crankshaft comprising:
a first journal having a circular cross-section defining a first journal center, the first journal being configured to be rotatably coupled to a cylinder block of the internal combustion engine; a second journal having a circular cross-section defining a second journal center, the second journal being configured to be rotatably coupled to the cylinder block of the internal combustion engine, wherein the first and second journal centers define a longitudinal crankshaft axis; and a crankpin defining a longitudinal crankpin axis and being configured to be coupled to a connecting rod, the longitudinal crankpin axis being parallel to and spaced from the longitudinal crankshaft axis, the crankpin comprising
at least one crankpin journal,a first cam comprising a first cam profile,a second cam comprising a second cam profile, anda third cam comprising a third cam profile,wherein the first, second, and third cam profiles differ from one another, and wherein at least one of the first, second, and third cam profiles is configured to affect a stroke of the connecting rod coupled to the crankpin.