Method for monitoring urea quality of an scr system
AssigneeInergy Automotive Systems Research (Societe Anonyme)
InventorsJames Edward THOMPSON, Jean-Claude HABUMUREMYI, Josh BUTLER, Stephane LEONARD, Frederic JANNOT
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Abstract
A method for monitoring urea concentration and quality in a urea solution stored in a tank of an SCR system. The system comprising a pump driven by a motor and the pressure of which is controlled by a controller. The method comprises the steps of:—measuring a parameter value characteristic of the energy transmitted by the motor to the pump;—determining a urea concentration value based upon the parameter value characteristic of the energy transmitted by the motor to the pump.
Claims10
A method for monitoring urea concentration in a urea solution stored in a tank of a SCR system, said system comprising a pump driven by a motor and the pressure of the pump is controlled by a controller, wherein the method comprises the steps of:
- measuring a parameter value characteristic of the energy transmitted by the motor to the pump;
- determining a urea concentration value based upon the parameter value characteristic of the energy transmitted by the motor to the pump.
A SCR system, comprising:
- a tank for storing a urea solution;
- a pump driven by a motor;
- a controller for controlling the pressure of the pump;
- a control module including logic means for measuring a signal representing a parameter value characteristic of the energy transmitted by the motor to the pump and logic means for determining a urea concentration value based upon the parameter value characteristic of the energy transmitted by the motor to the pump.
Dependencies are inferred from the claim text.