Procedure for a reasonability check of a temperature sensor
AssigneeRobert Bosch GmbH
InventorsBuelent Barcin, Marc Chaineux, Andreas Wagner
Life of this patent
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Abstract
A procedure for a reasonability check of the signal of a temperature sensor that is arranged in a reducing tank, in particular a HWL-tank, is thereby characterized, in that the tank level is detected by a tank level sensor that is arranged almost at the same filling level position as the temperature sensor, in that the tank level sensor signal is compared to the temperature sensor signal and then, if default tank level sensor signals correlate within default limits with default temperature sensor signal values, a functioning temperature sensor and/or a functioning tank level sensor are indicated.
Claims8
A method of performing a reasonability check of a signal of a tank temperature sensor that is arranged in a reducing tank, the method comprising:
- detecting a tank level by a tank level sensor that is arranged almost at a same filling level position as the tank temperature sensor, wherein a tank level sensor signal is compared to a tank temperature sensor signal, and wherein a functioning tank temperature sensor and tank level sensor are indicated if default tank level sensor signal values correlate within default limits with default tank temperature sensor signal values.
A computer program that executes all steps of a method, if run on a control unit of a combustion engine, of performing a reasonability check of a signal of a tank temperature sensor that is arranged in a reducing tank, the method comprising:
- detecting a tank level by a tank level sensor that is arranged almost at a same filling level position as the tank temperature sensor, wherein a tank level sensor signal is compared to a tank temperature sensor signal, and wherein a functioning tank temperature sensor and tank level sensor are indicated if default tank level sensor signal values correlate within default limits with default tank temperature sensor signal values.
A computer program product with a program code that is stored on a machine readable medium to implement, if the program is carried out on a control unit, a method of performing a reasonability check of a signal of a tank temperature sensor that is arranged in a reducing tank, the method comprising:
- detecting a tank level by a tank level sensor that is arranged almost at a same filling level position as the tank temperature sensor, wherein a tank level sensor signal is compared to a tank temperature sensor signal, and wherein a functioning tank temperature sensor and tank level sensor are indicated if default tank level sensor signal values correlate within default limits with default tank temperature sensor signal values.
Dependencies are inferred from the claim text.