METHOD FOR DETERMINING AN AMOUNT OF LIQUID REMOVED FROM A TANK AND REDUCING AGENT SUPPLY DEVICE FOR A MOTOR VEHICLE
First Claim
1. A method for determining an amount of liquid removed from a tank per unit time, the method comprising the following steps:
- discontinuously feeding the liquid removed from the tank through an injection line to exhaust gas of an internal combustion engine;
simultaneously measuring time-dependent pressures at least at two respective points in the injection line; and
determining an amount of the liquid supplied per unit time from the measured pressures.
2 Assignments
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Accused Products
Abstract
A method for determining an amount of liquid removed from a tank per unit time includes discontinuously feeding the liquid to exhaust gas of an internal combustion engine by at least feeding the liquid through an injection line into the exhaust gas, measuring pressures simultaneously at least at two points in the injection line and determining an amount of liquid fed in per unit time from the measured pressures. The amount of liquid removed between a first point in time and a second point in time is further derived by integrating the amounts of liquid removed per unit time over a period of time from the first point in time to the second point in time. The method allows the precise consumption of the liquid to be calculated and the remaining amount of liquid in the tank to be additionally determined. On-board diagnosis is further possible with the method.
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Citations
15 Claims
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1. A method for determining an amount of liquid removed from a tank per unit time, the method comprising the following steps:
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discontinuously feeding the liquid removed from the tank through an injection line to exhaust gas of an internal combustion engine; simultaneously measuring time-dependent pressures at least at two respective points in the injection line; and determining an amount of the liquid supplied per unit time from the measured pressures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification