Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-12-28
2010-10-26
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090310
Reexamination Certificate
active
07819098
ABSTRACT:
A variable valve timing device delivers rotation of a crankshaft to a first camshaft, and to a second camshaft through the first camshaft. First and second variable valve timing units change phases of the first and second camshafts, respectively. A crankshaft sensor senses angle changes of the crankshaft. A camshaft sensor senses angle changes of the second camshaft. A control portion controls the phase of the second camshaft by controlling the second variable valve timing unit, or controls the phases of both camshafts by controlling the first variable valve timing unit, according to signals from the crankshaft sensor and the camshaft sensor. Also, a control method for such a device. One of several possible modes is selected. Target phases of the camshafts corresponding to an operation of an engine are determined. Phases of the first camshaft and/or the second camshaft are controlled according to the selected mode.
REFERENCES:
patent: 2003/0230267 (2003-12-01), Quinn, Jr.
patent: 5-106411 (1993-04-01), None
patent: 2003-49671 (2003-02-01), None
Eshete Zelalem
Hyundai Motor Company
Morgan & Lewis & Bockius, LLP
LandOfFree
Variable valve timing apparatus and control method for the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable valve timing apparatus and control method for the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable valve timing apparatus and control method for the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4221216