Valve timing controller
AssigneeDenso Corporation
InventorDaisuke Mizuno
Life of this patent
Estimating the term…
Abstract
A valve timing controller has the drive circuit which performs a feedback control of the energization to the electric motor based on the target rotation speed and the actual rotation speed of the electric motor, and rotates the electric motor to the target rotation direction. An invalid switch part of the drive circuit suspends the feedback control at the time of change of the target rotation direction.
Claims9
A valve timing controller for an internal combustion engine, the valve timing controller adjusting a valve timing of at least one of an intake valve and an exhaust valve by driving an electric motor in a normal rotation direction or a reverse rotation direction, comprising:
- a drive circuit for performing a feedback control of an energization to the electric motor based on a target rotation speed and an actual rotation speed of the electric motor so as to rotate the electric motor to a target rotation direction, wherein
- the drive circuit stops the feedback control at the time of changing the target rotation direction.
Dependencies are inferred from the claim text.