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US 11,905,858 B2Granted
Systems and methods for rocker arm lubrication
AssigneePowerhouse Engine Solutions Switzerland IP Holding GmbH
InventorsSandeep Namadev Kamble, John Patrick Dowell, Samir Vikas Joshi
Life of this patent
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Abstract
Systems and methods for intermittent supply of lubricating oil to a tip of a rocker arm assembly. In one embodiment, a lubricating oil may be selectively to a tip of a rocker arm via oil channels aligned only during opening of a valve coupled to the tip.
Claims16
A method for an engine, the method comprising:
- selectively supplying lubricating oil to a tip of a rocker arm via oil channels aligned only during opening of a valve coupled to the tip, wherein supplying the lubricating oil includes splashing the lubricating oil via an oil supply channel to a cover of the rocker arm;
- directing the splashed oil from a ridge formed into the cover that is offset from the oil supply channel to a first protrusion housed on the cover, the splashed oil further directed from the first protrusion onto the tip of the rocker arm as a first jet of oil, wherein the first protrusion is positioned directly in line with the first jet of oil and a valve lift mechanism of the valve during opening of the valve;
- and
- directing the splashed oil from the ridge to a second protrusion housed on the cover, the splashed oil further directed from the second protrusion onto a pushrod system as a further jet of oil,
- wherein the pushrod system is coupled to the rocker arm during opening of the valve,
- wherein the second protrusion is positioned directly in line with the further jet of oil and the pushrod system,
- wherein each of the first protrusion and the second protrusion is horizontally offset from a pivot point on a rocker shaft along a horizontal axis running through the valve lift mechanism and the pushrod system, and
- wherein a first amount of oil dripped from the first protrusion onto the valve lift mechanism is higher relative to a second amount of oil dripped from the second protrusion onto the pushrod system.
5 more elements
A system for an engine, the system comprising:
- a first vertical channel fluidically coupled to an oil sump at a cylinder head at a first end via one or more vertical and horizontal channels;
- a supply channel selectively aligned with the first vertical channel based on an angle of a rocker arm during opening of a valve;
- a cover of the rocker arm including a first segment and a second segment divided via a ridge, the ridge offset from the supply channel;
- and
- a first protrusion positioned directly in line with a first jet of oil and a valve lift mechanism of the valve coupled to the rocker arm during opening of the valve, and a second protrusion positioned directly in line with a further jet of oil and a pushrod system coupled to the rocker arm during opening of the valve,
- wherein the first protrusion is positioned on a surface of the first segment of the cover, and the second protrusion is positioned on another surface of the second segment of the cover, the first protrusion larger in size relative to the second protrusion and configured to direct oil splashed onto the cover from the ridge onto the valve lift mechanism as the first jet of oil, and wherein the second protrusion is configured to direct the oil splashed onto the cover from the ridge as the further jet of oil onto the pushrod system, the first jet of oil comprising a larger amount of oil compared to the further jet of oil.
3 more elements
Dependencies are inferred from the claim text.