Method and apparatus to monitor operation of an auxiliary...

Details Method and apparatus to monitor operation of an auxiliary... Method and apparatus to monitor operation of an auxiliary...

2006-09-13

2009-06-09

Ho, Ha D. (Department: 3655)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S157000, C477S164000

Reexamination Certificate

active

07544151

ABSTRACT:
A method and apparatus to monitor operation of an electrically-actuated hydraulic pump selectively operative to supply pressurized fluid to a hydraulic circuit for a transmission device operably connected to an internal combustion engine of a vehicle includes monitoring vehicle operation and passively and intrusively monitoring hydraulic circuit pressure. The hydraulic pump is functioning properly when the monitored pressure in the hydraulic circuit exceeds a threshold. A fault related to the hydraulic circuit is identified when the monitored pressure in the hydraulic circuit does not exceed the threshold.

REFERENCES:
patent: 4864823 (1989-09-01), Ikejiri et al.
patent: 7073328 (2006-07-01), Knoblauch
patent: 7288039 (2007-10-01), Foster et al.
patent: 01199004 (1989-08-01), None

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