Variable valve timing control device of internal combustion...

Details Variable valve timing control device of internal combustion... Variable valve timing control device of internal combustion...

2006-09-19

2006-09-19

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07107951

ABSTRACT:
A required valve timing change rate Vreq is calculated so as to make a deviation D between a target valve timing VTtg and an actual valve timing VT small and then a required speed difference DMCRreq between a motor 26 and a camshaft 16 is calculated on a basis of the required valve timing change rate Vreq. When the deviation D is larger than a predetermined value, a required motor speed Rmreq is calculated by adding the required speed difference DMCRreq to a camshaft speed RC and a motor control value is calculated so as to control the motor speed RM to the required motor speed Rmreq. When the deviation D is not larger than the predetermined value, the camshaft speed RC is set as the required motor speed Rmreq and the motor control value is calculated so as to control the motor speed RM to the camshaft speed RC.

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As stated in Block No. 5 of the attached IDS, a concise explanation of the above foreign references'relevancy is given by this english language verison of the Korean Office Action which is attached for the Examiner's information.
Examination Report cited in corresponding JP application JP2003-320612.
Examination Report cited in corresponding JP application JP2003-045392.

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