Method for diagnosing a lambda sensor during ongoing operation
AssigneeRobert Bosch GmbH
InventorBernhard Ledermann
Life of this patent
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Abstract
A method for diagnosing a lambda sensor during ongoing operation. It includes energizing the lambda sensor using a pump current pulse additive to a pump current and a pump current counter pulse additive to the pump current and ascertaining a malfunction of the lambda sensor from voltages, which are measured at a pump cell and/or a Nernst cell of the lambda sensor during the energization by the pulses.
Claims10
1-10. (canceled)
A method for diagnosing a lambda sensor during ongoing operation, comprising:
- energizing the lambda sensor using a pump current pulse additive to a pump current and a pump current counter pulse additive to the pump current;
- and
- ascertaining a malfunction of the lambda sensor from voltages which are measured at at least one of a pump cell, and a Nernst cell, of the lambda sensor, during the energizing by the pulses.
A computer-readable storage medium storing a computer program for diagnosing a lambda sensor during ongoing operation, the computer program, when executed on a computer, causing the computer to perform:
- energizing the lambda sensor using a pump current pulse additive to a pump current and a pump current counter pulse additive to the pump current;
- and
- ascertaining a malfunction of the lambda sensor from voltages which are measured at at least one of a pump cell, and a Nernst cell, of the lambda sensor, during the energizing by the pulses.
A control unit, which is designed for diagnosing a lambda sensor during ongoing operation, the control unit configured to:
- energize the lambda sensor using a pump current pulse additive to a pump current and a pump current counter pulse additive to the pump current;
- and
- ascertain a malfunction of the lambda sensor from voltages which are measured at at least one of a pump cell, and a Nernst cell, of the lambda sensor, during the energizing by the pulses.
Dependencies are inferred from the claim text.