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US 7,757,584 B2Granted
Connecting rod and internal combustion engine and automotive vehicle incorporating the same
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsTsuyoshi Kubota, Hiroshi Yamagata
Life of this patent
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Abstract
A connecting rod made of a titanium alloy is a split-type connecting rod which includes a rod main body, and a big end located at an end of the rod main body, the big end being fracture-split into a rod portion which continues from the end of the rod main body and a cap portion which is coupled to the rod portion. The rod portion and the cap portion each have a fractured surface on which rugged features are present. A difference in height between a highest portion and a lowest portion on each fractured surface is about 230 μm or more.
Claims10
A split connecting rod made of a titanium alloy, comprising:
- a rod main body;
- and
- a big end located at an end of the rod main body, the big end having a throughhole;
- wherein,
- the big end is fracture-split into a rod portion which continues from the end of the rod main body and a cap portion which is coupled to the rod portion;
- the rod portion and the cap portion each have a fractured surface on which rugged features are present;
- a difference in height between a highest portion and a lowest portion on each fractured surface is about 230 μm or more;
- each of the rod portion and the cap portion has inclusions in an area around the fractured surface thereof;
- and
- a longitudinal direction of the inclusions is at an angle of no less than 0° and no more than about 30° with respect to an abutting surface between the rod portion and the cap portion.
7 more elements
Dependencies are inferred from the claim text.