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US 11,668,210 B2Granted
Systems and methods for rocker arm lubrication
AssigneePowerhouse Engine Solutions Switzerland IP Holding GmbH
InventorsSandeep Namadev Kamble, John Patrick Dowell, Samir Vikas Joshi
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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.
Claims9
A method for an engine, the method comprising:
- during a first condition,
- supplying lubricating oil to a rocker arm, including a first tip of the rocker arm that is coupled to a valve and a lash adjuster end of the rocker arm opposite the first tip, via protrusions housed on a surface of a cover of the rocker arm that differ in size by splashing out the lubricating oil from a supply channel aligned with a first channel carrying the lubricating oil onto the protrusions, where the protrusions include a protrusion positioned above the first tip of the rocker arm and a further protrusion positioned above the lash adjuster end of the rocker arm opposite the first tip, and where more of the lubricating oil is supplied to the first tip of the rocker arm via the protrusion than to the lash adjuster end of the rocker arm via the further protrusion;
- and
- during a second condition, suspending supply of the lubricating oil to the first tip by offsetting the supply channel from the first channel.
1 more element
A system for an engine, the system comprising:
- a first channel fluidically coupled to an oil sump at a first end, wherein the oil sump is at a cylinder head;
- a supply groove selectively aligned with the first channel based on an angle of a rocker arm;
- and
- a cover of the rocker arm including a first sloping surface section and a second sloping surface section, wherein multiple protrusions are included on the first sloping surface section and the second sloping surface section, the multiple protrusions including a first protrusion pointing to a first end of the rocker arm on the first sloping surface section, the first end of the rocker arm coupled to a valve, and a second protrusion pointing to a second end of the rocker arm that is a lash adjuster end on the second sloping surface section, wherein the first protrusion and the second protrusion differ in size, the second protrusion being smaller in size than the first protrusion, and wherein the first protrusion and the second protrusion are configured to provide more lubricating oil to the first end of the rocker arm than to the second end of the rocker arm.
1 more element
Dependencies are inferred from the claim text.