Patent ID: 7293537
Filing Date: 2007-11-13
Classification: F01L,F02D,Y02T

Abstract:
1. A variable valve mechanism control device, comprising a variable valve mechanism for an internal combustion engine intake valve or exhaust valve, wherein a characteristic lift amount of the variable valve mechanism is continuously variable within a specified range; a first actuator to drive the variable valve mechanism; a first sensor to detect the current characteristic lift amount being set by the first actuator in the variable valve mechanism; and a variable valve mechanism control device adapted to control the first actuator to vary the characteristic lift amount within the specified range during a normal operation mode and to vary the characteristic lift amount within a sub-range of the specified range during an error operation mode when an error occurs in the first sensor; and wherein the variable valve mechanism control device is adapted to store a learned value based on a target value for current engine operating conditions and a command value for the normal mode of operation, and wherein the variable valve mechanism control device is adapted to control the first actuator to vary the characteristic lift amount within the sub-range during the error operation mode based on at least the target value and the learned value.