Method and arrangement for detecting and loosening jammed actuators
AssigneeRobert Bosch GmbH
InventorFrank Rodefeld
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Abstract
A method and an arrangement are described for detecting a jammed or frozen actuator of an internal combustion engine, the actuator being shaken free in the case of a jamming.
Claims14
In a process for adjusting an operating parameter of an internal combustion engine with an electromechanical actuator for adjusting the airflow to the engine with the airflow to the engine being controlled via the position of the actuator by an electronic control device in dependence upon a pregiven and an instantaneous position of the actuator, the process including a method of detecting and loosening the actuator when it is jammed, the method comprising the steps of:
- detecting a jammed condition of the actuator from an increasing deviation between the pregiven position and the instantaneous position;
- and,
- causing said actuator to be subjected to a periodic shaking movement in order to loosen the actuator out of the jammed condition.
In an apparatus for adjusting an operating parameter of an internal combustion engine having an electromechanical actuator for adjusting the airflow to the engine with the airflow to the engine being controlled via the position of the actuator by an electronic control device in dependence upon a pregiven and an instantaneous position of the actuator, an arrangement for detecting and loosening the actuator when it is jammed, the arrangement comprising:
- detection means for detecting a jammed condition of the actuator in response to an increasing deviation between the pregiven position and the instantaneous position;
- and,
- control means for actuating said actuator to effect a periodic shaking movement of the actuator in order to loosen the actuator out of the jammed condition.
Dependencies are inferred from the claim text.