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.
Claims18
A split-type 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;
- and
- a difference in height between a highest portion and a lowest portion on each fractured surface is about 230 μm or more.
A split-type connecting rod made of a titanium alloy, comprising:
- a rod main body;
- a small end located at an end of the rod main body, the small end having a throughhole;
- and
- a big end located at another end of the rod main body, the big end having a throughhole with a larger diameter than that of the throughhole of the small end;
- wherein
- the big end is split into a rod portion which continues from the another end of the rod main body and a cap portion which is coupled to the rod portion with a bolt;
- the big end has a bolt hole in which a bolt is to be screwed;
- and
- the bolt hole is a bottomed hole which extends from the cap portion toward the rod portion and has a bottom surface within the rod portion.
Dependencies are inferred from the claim text.