Cylinder head structure for internal combustion engine
The cam carrier internal passage in the cylinder head structure addresses the interference issues of oil passage formation, ensuring reliable oil supply to hydraulic lash adjusters, enhancing engine performance by reducing interference and preventing oil shortage.
US20260176988A1Pending Publication Date: 2026-06-25NISSAN MOTOR CO LTD
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- NISSAN MOTOR CO LTD
- Filing Date
- 2022-11-04
- Publication Date
- 2026-06-25
Smart Images
Figure US20260176988A1-D00000_ABST
Abstract
Air-intake-side and air-discharge-side first hydraulic lash adjusters (36, 37) are provided to a cylinder head (1) in an internal combustion engine. An oil original-pressure passage (45) is positioned at a width-direction central section of the cylinder head (1), the oil original-pressure passage (45) communicating with an oil reservoir part (46). A cam carrier internal passage (52) that passes through the interior of a cam carrier (2) is provided to the air-intake-side lash adjuster (36). Oil is supplied from the oil reservoir part (46) to a lash-adjuster mounting hole (38) via the cam carrier internal passage (52) and an air-intake-side oil passage (53).
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