Patent ID: 8050850
Filing Date: 2011-11-01
Classification: F01L,F02D,Y02T

Abstract:
1. A control apparatus for an internal combustion engine that includes: a valve timing change mechanism that changes a valve timing of an air intake valve; a lift amount change mechanism that changes a maximum lift value and a lift time of the air intake valve through displacement of a movable part; a position detection device that sets a base position based on a movable limit position where the maximum lift value and the lift time become largest, and detects a position of the movable part based on accumulated movement of the movable part from the base position; and a control device that performs coordinated control in which a target position of the movable part is set based on a requested intake air amount, the movable part is moved such that the detected position of the movable part becomes the target position to operate the lift amount change mechanism, and operates the valve timing change mechanism according to a control state of the lift amount change mechanism, the control apparatus comprising: an abnormality estimation device that estimates whether an instantaneous interruption of the electrical power supply to the position detection means occurs, wherein, when the abnormality estimation device estimates the instantaneous interruption of the electrical power supply to the position detection means occurs, the control device forbids the coordinated control and operates the valve timing change mechanism based on engine load.