Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate
2006-06-30
2010-11-09
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
C701S060000
Reexamination Certificate
active
07827944
ABSTRACT:
A control system and method for a hydraulic system (HS) that controls a fluid supply in an engine includes a timer module determines the response time of the HS to perform at least one of: increasing the pressure of the fluid supply above a predetermined threshold following the state change command and decreasing said pressure of said fluid supply below said predetermined threshold following said state change command. An update module updates the desired time of the HS based on the response time of the HS.
REFERENCES:
patent: 6131539 (2000-10-01), Thomas
patent: 6688275 (2004-02-01), Shindou et al.
patent: 6712651 (2004-03-01), Kanno
patent: 7375105 (2008-05-01), Dean et al.
Chang Ching
GM Global Technology Operations Inc.
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