Patent ID: 7489999
Filing Date: 2009-02-10
Classification: F02D,Y02T

Abstract:
1. A control apparatus for a variable valve apparatus including a center phase variable mechanism which varies a phase of the center of an operating angle of an intake valve, and a valve lift amount variable mechanism which varies a valve lift amount of the intake valve and the operating angle thereof, comprising: a region discriminating section that discriminates an operating region of an engine as to which one of a first operating region where an intake air amount changes in proportion to an opening area of the intake valve, a second operating region where the intake air amount does not substantially change relative to a change in the opening area of the intake valve, and an intermediate operating region between the first and second operating regions does take place; an error computing section that computes an error in intake air amount of the engine; an influence ratio computing section that, when the engine is operated in the intermediate operating region, computes influence ratio between influence on the center phase variable mechanism and that on the valve lift amount variable mechanism in relation to the error in intake air amount computed by the error computing section; and a learning section that, when the engine is operated in the intermediate operating region, learns correction values for correcting control process of the center phase variable mechanism and control process of the valve lift amount variable mechanism, based on the error in intake air amount computed by the error computing section and the influence ratio computed by the influence ratio computing section.