Patent Number: 7,464,677

Title: Compact lash adjuster feed channel apparatus

Abstract: The apparatus of the present invention provides a lash adjuster feed channel for an engine assembly. The engine assembly includes first and second sets of hydraulic lash adjusters responsive to a variation in hydraulic fluid pressure to cause a variation in lift of first and second sets of engine valves respectively operatively connected thereto. The cylinder head defines a first feed passage in fluid communication with the first set of hydraulic lash adjusters, and a second feed passage in fluid communication with the second set of hydraulic lash adjusters. The valve lift of the first set of engine valves is independently variable by controlling the transfer of hydraulic pressure in the first feed passage, and the valve lift of the second set of engine valves is independently variable by controlling the transfer of hydraulic pressure in the second feed passage. A corresponding method is also provided.

Inventors: Neal; Timothy L. (Ortonville, MI), Patel; Vimesh M. (Novi, MI), Marriott; Craig D. (Clawson, MI)

Assignee: GM Global Technology Operations, Inc.

International Classification: F01L 1/14 (20060101)

Expiration Date: 2021-12-16 0:00:00