Method for determining the quantity of reducing agent in a tank
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United States of America Patent
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Feb 27, 2018
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app pub date -
Aug 15, 2016
filing date -
Jun 24, 2011
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Abstract
A method for determining the quantity of reducing agent in a tank vehicle, including: a storage material in the tank for storing and releasing the reducing agent according to demand; a heating device to supply heat to release the reducing agent, and a control device for driving the heating device. After the motor vehicle is started, driving the heating device so that it delivers constant power during an initial phase over which the pressure inside the tank increases until it reaches a predetermined value. The heating device then regulating the pressure around a datum value; then measuring the time of the initial phase or the derivative of pressure with respect to time during this initial phase; and comparing the measured time against various calibrated values of the initial phase in order to determine the quantity of reducing agent in the tank.
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