ELECTRONIC THROTTLE

摘要

An ECU loads detected values of a rotation angle sensor and a pressure sensor which are mounted to an electric throttle, and executes an abnormal-sensor determination control to determine whether one of the rotation angle sensor and the pressure sensor is abnormal. Specifically, the ECU determines that one of the rotation angle sensor and the pressure sensor is abnormal, in a case where a state that a tendency of the actual opening angle detected by the rotation angle sensor does not match a tendency of the pressure detected by the downstream pressure sensor has continued for a period greater than or equal to a predetermined period. Therefore, since the pressure sensor can replace the rotation angle sensor used for detecting abnormality in a conventional technology, two rotation angle sensors can be reduced to one rotation angle sensor, and a cost is reduced.

主权项

1. An electric throttle comprising:
a throttle body disposed in an intake passage of an internal combustion engine and defining a throttle passage corresponding to a part of the intake passage; a throttle valve adjusting an intake quantity of the internal combustion engine by increasing or decreasing an opening area of the throttle passage; a rotation angle sensor detecting an actual opening angle of the throttle valve; a motor generating a torque to drive the throttle valve such that the actual opening angle of the throttle valve detected by the rotation angle sensor matches a target throttle opening angle; a downstream pressure sensor detecting a pressure downstream of the throttle valve; and an abnormal-sensor determining portion determining that one of the rotation angle sensor and the downstream pressure sensor is abnormal, in a case where a state that a tendency of the actual opening angle detected by the rotation angle sensor does not match a tendency of the pressure detected by the downstream pressure sensor has continued for a period greater than or equal to a predetermined period.