Patent ID: 6668775
Filing Date: 2003-12-30
Classification: F01L,Y10T

Abstract:
A two-step finger follower rocker arm assembly for variably activating a gas valve in an internal combustion engine having a camshaft having a central lobe and at least one lateral lobe, comprising:a) a follower body having means for engaging said engine at a first end of said body and having an interface means for engaging a valve stem at a second end of said body and having a passage formed in said body between said first end and said second end and having a first bore transverse to said passage and having a second bore formed orthogonal to said first bore; b) a slider member slidably disposed in said passage and having a slot formed therethrough, said member having an outer surface for engaging said central lobe of said camshaft, and having a latching surface; c) a shaft disposed in said first bore and extending through said slot in said slider member; d) at least one lateral follower roller disposed on an end of said shaft outside said follower body for engaging said lateral lobe of said camshaft; and e) latching means disposed in said follower body for latching said slider member to said body to engage said outer surface with said central lobe to provide a first rocker assembly mode having a first valve lift capability, and for unlatching said slider member from said body to engage said lateral follower roller with said lateral camshaft lobe to provide a second rocker assembly mode having a second valve lift capability, said latching means including a lock-pin cartridge disposed in said second bore, said cartridge having a tubular body containing a piston and a return spring.