US 12,352,201 B1
Method for controlling a wastegate valve of a turbocharger
Herbert Parzer, Pichl bei Wels (AT)
Assigned to BRP-ROTAX GMBH & CO. KG, Gunskirchen (AT)
Filed by BRP-ROTAX GMBH & CO. KG, Gunskirchen (AT)
Filed on Aug. 19, 2024, as Appl. No. 18/808,504.
Claims priority of provisional application 63/675,309, filed on Jul. 25, 2024.
Int. Cl. F02B 37/18 (2006.01); F02D 41/00 (2006.01)
CPC F02B 37/183 (2013.01) [F02D 41/0007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling a wastegate valve of a turbocharger fluidly connected to an internal combustion engine of a vehicle, the method being executed by a controller of the vehicle, the method including:
(a) receiving a closed position request from an engine control unit;
(b) moving an actuator toward a previously stored closed position until a predetermined actuator position is reached, the actuator being operatively connected to the wastegate valve for actuating the wastegate valve;
(c) once the predetermined actuator position is reached, receiving an actual value indicative of force exerted by the actuator; and
(d) comparing the actual value indicative of force exerted by the actuator to an expected value indicative of force exerted by the actuator;
in response to the actual value indicative of force being less than the expected value indicative of force,
(e) moving the actuator away from an open position by a predetermined amount;
(f) replacing the previously stored closed position with a position of the actuator following step (e); and
(g) repeating steps (d) to (f) until the actual value indicative of force exerted by the actuator is greater than the expected value indicative of force exerted by the actuator.