Patent ID: 7121241
Filing Date: 2006-10-17
Classification: F01L,Y10T

Abstract:
1. A valve control system for an internal combustion engine including a cylinder head, and an engine poppet valve moveable in a generally vertical direction relative to said cylinder head between closed and open positions in response to rotation of a camshaft defining a cam profile having a base circle portion and a lift portion; a first rocker arm including a cam follower engageable with said cam profile, and defining a valve tip pad at one axial end thereof in engagement with a stem tip portion of said engine poppet valve, and further defining a fulcrum surface at the end axially opposite said valve tip pad; a lash compensation device fixed relative to said cylinder head for only generally vertical movement relative thereto, and including a fulcrum portion in engagement with said fulcrum surface of said first rocker arm; a valve return spring having a vertically upper end seated relative to said engine poppet valve and a vertically lower end; said valve control system being characterized by: (a) a deactivating rocker arm disposed vertically beneath said first rocker arm and including a pivot location fixed relative to said cylinder head; (b) said deactivating rocker arm having first and second end portions disposed axially opposite said pivot location, said first end portion being fixed vertically relative to said lower end of said valve return spring, and said second end portion being vertically fixed relative to a lower end of said lash compensation device; and (c) a latch member fixed relative to said cylinder head and operably associated with said one of said lash compensation device and said second end portion of said deactivating rocker arm whereby: