| 摘要 |
A variable valve timing controller for an internal combustion engine includes a hydraulic variable valve timing unit, a lock pin, and a hydraulic control valve. The lock pin is configured to lock the VCT phase at an intermediate lock position. The variable valve timing controller controls a valve drive electric current that is used for actuating the hydraulic control valve. The controller controls the valve drive electric current based on a first control characteristic in the operation of the hydraulic control valve under a first control range. The controller controls the valve drive electric current based on a second control characteristic in the operation of the hydraulic control valve under a second control range. The first control characteristic is different from the second control characteristic.
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