Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-06-03
2008-06-03
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090170, C123S090310, C464S160000
Reexamination Certificate
active
07380529
ABSTRACT:
A method for adjustment of the relative angle of rotation between a camshaft and a crankshaft in an internal combustion engine through an electromechanical phase adjuster is provided. The invention provides a rapid and precise adjustment behavior. To that end, a deviation of the adjustment speed (ΔΩ) between a desired adjustment speed (ΩSOLL) and an actual adjustment speed (ΩIST) is calculated from at least one measurement parameter in a second control loop cascaded below the first control loop. An output parameter is calculated dependent on the deviation of the adjustment speed (ΔΩ) through an adjustment speed adjuster (26) cascaded below the angle of rotation adjuster (23), with the output parameter being used to adjust the angle of rotation (Φ) using an electromechanical actuator (14). The relative angle of rotation can be rapidly and precisely adjusted by adjusting the adjustment speed. A phase adjuster for controlling the relative angle of rotation is also provided.
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Finis Uwe
Kianer Kave
Rohe Marco
Wilke Markus
AFT Atlas Fahrzeugtechnik GmbH
Chang Ching
Volpe and Koenig P.C.
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