Method for diagnosing an actuator for a boost pressure system of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsThomas Bleile, Thomas Oertel
Life of this patent
Estimating the term…
Abstract
A method for diagnosing an actuator for a boost pressure system of an internal combustion engine, in which the actuator is controlled using a triggering signal, and a state variable of the boost pressure system which is at least an indirect function of the triggering signal is detected. The triggering signal is periodic, and a curve of the values of the state variable is analyzed with regard to at least one periodic characteristic.
Claims27
A method for diagnosing an actuator for a boost pressure system of an internal combustion engine, comprising:
- controlling, by a control unit, the actuator using a triggering signal, the triggering signal being periodic at a selected frequency;
- detecting, by a sensor, a state variable of the boost pressure system which is at least an indirect function of the triggering signal, the state variable being periodic at the selected frequency;
- and
- analyzing, by the control unit, a curve of values of the state variable with regard to at least one periodic characteristic to determine whether a rate of response of the actuator to the triggering signal has at least a predetermined threshold value.
A non-transitory computer-readable medium containing a computer program which when executed by a processor performs the following method for diagnosing an actuator for a boost pressure system of an internal combustion engine:
- controlling the actuator using a triggering signal, the triggering signal being periodic at a selected frequency;
- detecting a state variable of the boost pressure system which is at least an indirect function of the triggering signal, the state variable being periodic at the selected frequency;
- and
- analyzing a curve of values of the state variable with regard to at least one periodic characteristic to determine whether a rate of response of the actuator to the triggering signal has at least a predetermined threshold value.
A control unit for diagnosing an actuator for a boost pressure system of an internal combustion engine, comprising:
- an arrangement for controlling the actuator using a triggering signal, the triggering signal being periodic at a selected frequency;
- an arrangement for detecting a state variable of the boost pressure system which is at least an indirect function of the triggering signal, the state variable being periodic at the selected frequency;
- and
- an arrangement for analyzing a curve of values of the state variable with regard to at least one periodic characteristic to determine whether a rate of response of the actuator to the triggering signal has at least a predetermined threshold a sufficiently high value.
Dependencies are inferred from the claim text.