Control system and method for an internal combustion engine having a VVT device

摘要

The system has a control shaft sensor (19) that detects an operating condition of a variable control mechanism and produces a signal. A controller controls the operating condition of the mechanism in response to the signal from the sensor. The controller is programmed to vary operational characteristics of the mechanism when the operation responsiveness is lowered. An independent claim is also included for a control method for an internal combustion engine.