Wastegate valve position correction

摘要

Various methods for compensating a deflected linkage in a wastegate arrangement are provided. In one example, current is applied to an actuator to move a wastegate valve coupled through a linkage to the actuator for diverting gasses from a turbocharger. The position of the actuator is indicated, and a correction to said indicated actuator position is applied compensating for deflection of the linkage based at least on said applied current. Said applied current is adjusted when said corrected actuator position reaches a position corresponding to a desired valve position.

主权项

1. A method of controlling a wastegate comprising:
a linkage coupled the wastegate valve to an actuator for diverting exhaust gases from an engine to a turbocharger, and a controller having non-transitory instructions to execute of: applying current to the actuator to move the wastegate valve, indicating a position of the actuator; applying a correction to said indicated actuator position compensating for deflection of the linkage based at least on said applied current; and adjusting said current to be applied to the actuator when said corrected actuator position reaches a position corresponding to a desired wastegate valve position to maintain a wastegate valve lift.