Internal combustion engine
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United States of America Patent
Stats
-
Mar 14, 2023
Grant Date -
Dec 1, 2022
app pub date -
Apr 19, 2022
filing date -
May 25, 2021
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An internal combustion engine is provided, which includes an engine body provided with a cylinder having openings for intake and exhaust, and valve bodies that open and close the openings, cam shafts, each provided with a cam lobe that depress the corresponding valve body to open the openings, and bearing members pivotally supporting the cam shaft via lubricating oil. The cam shaft includes cam journals pivotally supported by the bearing members, and a recess formed at a position of the cam journal, opposing the cam lobe in the circumferential direction, and depressed radially inwardly of the cam journal, the recess being deeper in an axial end part of the cam journal than an axial center part.
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