Patent ID: 7789065
Filing Date: 2010-09-07
Classification: F01L,F02D,F02M

Abstract:
1. Apparatus for modifying engine valve lift to produce an engine valve event in an internal combustion engine, the engine including at least one exhaust valve and an exhaust valve lifter for cyclically opening and closing the at least one exhaust valve, said apparatus comprising: (a) actuation means for operating the at least one exhaust valve to produce said modified engine valve lift, said actuation means having an inoperative position and an operative position; in said inoperative position said actuation means being disengaged from the at least one exhaust valve, and in said operative position said actuation means opening the at least one exhaust valve for said engine valve event; and (b) control means for moving said actuation means between said inoperative position and said operative position, the movement of said actuation means by said control means taking place after the at least one exhaust valve is actuated by said exhaust valve lifter, wherein said actuation means further comprises a lash adjusting system for setting a lash between said actuation means and the at least one exhaust valve, wherein said actuation means further comprises mechanical linkage means for transmitting load generated by said engine valve event, said mechanical linkage means including at least one system selected from the group consisting of: a rotatable device, a slidable device, a ball-locking device, and a toggle device, and wherein said rotatable device contains a first surface commensurate with said operative position and a second surface commensurate with said inoperative position; said first surface and said second surface having a height difference, and said height difference minus the lash set by said lash adjusting system determining said modified engine valve lift for said engine valve event.