Patent ID: 9382821
Filing Date: 2016-07-05
CPC Classification: F01L,F02N,F16K,Y10T

Claim Text:
1. A check valve assembly for facilitating engine start-up, the check valve assembly associated with a hydraulic fluid pressure chamber of the engine that is configured to receive a flow of hydraulic fluid, the check valve assembly comprising: a body defining a lower bore, an upper bore and a valve opening formed therebetween, the lower bore defining a valve seat and the valve opening defining a necked down channel fluidly coupling the upper and lower bores; a metering groove formed in the valve seat, the metering groove configured to allow a controlled flow of the hydraulic fluid through the check valve assembly to a hydraulically actuated valvetrain of the engine when the check valve assembly is in a closed position; a lower retainer coupled to a lower end of the lower bore to define a lower chamber housing a check ball, the lower retainer defining a central support area for supporting the check ball and a plurality of valve inlets adjacent the central support area; an upper retainer coupled to an upper end of the upper bore to define an upper chamber, the upper retainer including an anti-siphoning umbrella valve slidably coupled thereto and defining a plurality of valve outlets, the anti-siphoning umbrella valve configured to open and close the valve outlets; wherein the check ball is operable to engage the valve seat in a closed position and is biased in a normally open position to engagement with the central support area, allowing air to flow through the check valve assembly and out the valve outlets to purge air from the hydraulic fluid pressure chamber for the engine start-up, until hydraulic fluid enters the valve inlets and causes the check valve assembly to move into the closed position such that the controlled flow of the hydraulic fluid is supplied through the metering groove to the hydraulically actuated valvetrain.