Method for manufacturing a tank with a calibrated sensor
First Claim
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1. A method for manufacturing a tank for a motor vehicle for storing a liquid additive, the method comprising:
- installing at least one filling level sensor for determining a filling level of the liquid additive in the tank;
at least partially filling the tank with a predefined quantity of a test liquid;
determining a signal of the sensor indicating the filling level of the test liquid in the tank;
calibrating the sensor using a correction value obtained by comparing a reference signal with the signal of the sensor indicating the filling level of the test liquid in the tank;
emptying the test liquid from the tank after performing the step of calibrating the sensor; and
adding the liquid additive to the tank after performing the step of emptying the tank;
wherein the test liquid is water and is not a urea-water solution, and the liquid additive is the urea-water solution; and
wherein the sensor comprises an ultrasonic sensor.
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Abstract
A method for manufacturing a tank for a motor vehicle for storing a liquid additive with a calibrated sensor for determining at least one parameter of the liquid additive in the tank. In a step a) the sensor is installed in the tank. In a step b) the tank is at least partially filled with a predefined quantity of a test liquid. In a step c) a signal of the sensor is determined, and in a step d) the sensor is calibrated with the signal.
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Citations
6 Claims
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1. A method for manufacturing a tank for a motor vehicle for storing a liquid additive, the method comprising:
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installing at least one filling level sensor for determining a filling level of the liquid additive in the tank; at least partially filling the tank with a predefined quantity of a test liquid; determining a signal of the sensor indicating the filling level of the test liquid in the tank; calibrating the sensor using a correction value obtained by comparing a reference signal with the signal of the sensor indicating the filling level of the test liquid in the tank; emptying the test liquid from the tank after performing the step of calibrating the sensor; and adding the liquid additive to the tank after performing the step of emptying the tank; wherein the test liquid is water and is not a urea-water solution, and the liquid additive is the urea-water solution; and wherein the sensor comprises an ultrasonic sensor. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification