Method for operating an internal combustion engine with an SCR catalytic converter
First Claim
1. Method for operating an internal combustion engine of a motor vehicle, the method comprising:
- providing at least one SCR catalytic converter for after-treatment of exhaust gases of the internal combustion engine;
assuring that a sufficient quantity of reducing agent is supplied for operation of the SCR catalytic converter over a range of the motor vehicle by;
providing a reducing agent tank with a fill level sensor;
acquiring signals from the fill level sensor by a location tracking navigation unit; and
evaluating the signals from the fill level sensor by the location tracking navigation unit to calculate the range of the motor vehicle;
acquiring signals from a central engine control unit and an SCR catalytic converter control unit;
relaying the signals from the central engine control unit and the SCR catalytic converter control unit to the location tracking navigation unit; and
evaluating the signals from the central engine control unit and the SCR catalytic converter control unit by the location tracking navigation unit.
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Accused Products
Abstract
A method for operating an internal combustion engine of a motor vehicle is provided, wherein at least one SCR catalytic converter for the after-treatment of exhaust gases of the internal combustion engine is present. The method serves to assure that a sufficient quantity of reducing agent is supplied for the operation of the SCR catalytic converter. The motor vehicle has a fuel tank (10) with a fill level sensor A (11) and a reducing agent tank (12) with a fill level sensor B (13). Signals from the fill level sensor B (13) or signals from the fill level sensor A (11) and the fill level sensor B (13) are acquired and evaluated by a navigation unit (16).
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Citations
18 Claims
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1. Method for operating an internal combustion engine of a motor vehicle, the method comprising:
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providing at least one SCR catalytic converter for after-treatment of exhaust gases of the internal combustion engine; assuring that a sufficient quantity of reducing agent is supplied for operation of the SCR catalytic converter over a range of the motor vehicle by; providing a reducing agent tank with a fill level sensor; acquiring signals from the fill level sensor by a location tracking navigation unit; and evaluating the signals from the fill level sensor by the location tracking navigation unit to calculate the range of the motor vehicle; acquiring signals from a central engine control unit and an SCR catalytic converter control unit; relaying the signals from the central engine control unit and the SCR catalytic converter control unit to the location tracking navigation unit; and evaluating the signals from the central engine control unit and the SCR catalytic converter control unit by the location tracking navigation unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Method for operating an internal combustion engine of a motor vehicle, the method comprising:
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providing at least one SCR catalytic converter for after-treatment of exhaust gases of the internal combustion engine; assuring that a sufficient quantity of reducing agent is supplied for operation of the SCR catalytic converter over a range of the motor vehicle by; providing a reducing agent tank with a fill level sensor; acquiring signals from the fill level sensor by a location tracking navigation unit; and evaluating the signals from the fill level sensor by the location tracking navigation unit to calculate the range of the motor vehicle; acquiring an engine rotational speed, a vehicular speed, and engine operating hours; relaying the engine rotational speed, the vehicular speed, and the engine operating hours to the location tracking navigation unit; and evaluating the engine rotational speed, the vehicular speed, and the engine operating hours by the location tracking navigation unit.
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14. Arrangement for operating an internal combustion engine of a motor vehicle, the arrangement comprising:
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a reducing agent tank for holding reducing agent, the reducing agent tank including a fill level sensor; at least one SCR catalytic converter for after-treatment of exhaust gases of the internal combustion engine; a location tracking navigation unit; a central engine control unit; and a SCR catalytic converter control unit; wherein signals are acquired from the fill level sensor by the location tracking navigation unit; wherein a sufficient quantity of the reducing agent supplied for operation of the at least one SCR catalytic converter over a range of the motor vehicle is assured by evaluating the signals from the fill level sensor by the location tracking navigation unit to calculate the range of the motor vehicle; wherein signals are acquired from the central engine control unit and the SCR catalytic converter control unit; wherein the signals from the central engine control unit and the SCR catalytic converter control unit are relayed to the location tracking navigation unit; and wherein the signals from the central engine control unit and the SCR catalytic converter control unit are evaluated by the location tracking navigation unit. - View Dependent Claims (15, 16, 17, 18)
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Specification