Compact lash adjuster feed channel apparatus

Details Compact lash adjuster feed channel apparatus Compact lash adjuster feed channel apparatus

2011-02-22

2011-02-22

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Tappet

C123S090160, C123S090430, C123S090550

Reexamination Certificate

active

07891329

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.

REFERENCES:
patent: 5031586 (1991-07-01), Masuda et al.
patent: 7308872 (2007-12-01), Sellnau et al.
patent: 7464677 (2008-12-01), Neal et al.
patent: 2007/0163523 (2007-07-01), Miyazato et al.
patent: 2004226145 (2008-08-01), None
patent: 2005068793 (2005-07-01), None

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