SELECTIVE CATALYTIC REDUCTION DOSING CONTROL
First Claim
1. An emissions control system for treating exhaust gas in a motor vehicle including an internal combustion engine, the emissions control system comprising:
- a reductant injector device;
a selective catalytic reduction (SCR) Device; and
a controller configured to;
determine a reductant energizing time for the reductant injector device based on one or more operating conditions of the SCR device;
compute a diagnostic adaptation factor for the reductant energizing time based on an on-board diagnostic signal; and
input an amount of reductant into the SCR device by adjusting a reductant energizing time of the reductant injector device according to the diagnostic adaptation factor.
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Accused Products
Abstract
Technical solutions are described for an emissions control system for a motor vehicle including an internal combustion engine. The emissions control system includes a reductant injector device, a selective catalytic reduction (SCR) device, and a controller. The controller determines a reductant energizing time for the reductant injector device based on one or more operating conditions of the SCR device. The controller further computes a diagnostic adaptation factor for the reductant energizing time based on an on-board diagnostic signal. The controller further inputs an amount of reductant into the SCR device by adjusting a reductant energizing time of the reductant injector device according to the diagnostic adaptation factor.
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Citations
20 Claims
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1. An emissions control system for treating exhaust gas in a motor vehicle including an internal combustion engine, the emissions control system comprising:
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a reductant injector device; a selective catalytic reduction (SCR) Device; and a controller configured to; determine a reductant energizing time for the reductant injector device based on one or more operating conditions of the SCR device; compute a diagnostic adaptation factor for the reductant energizing time based on an on-board diagnostic signal; and input an amount of reductant into the SCR device by adjusting a reductant energizing time of the reductant injector device according to the diagnostic adaptation factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An exhaust system for treating exhaust gas emitted by an internal combustion engine, configured to perform a selective catalytic reduction (SCR) of exhaust gas, the exhaust system comprising:
a controller configured to; compute a diagnostic adaptation factor for an SCR device of the exhaust system based on an on-board diagnostic signal; and input an amount of a reductant into the SCR device by configuring the exhaust system according to the diagnostic adaptation factor. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A computer-implemented method for controlling a selective catalytic reduction (SCR) device of an exhaust system of an internal combustion engine, the method comprising:
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computing a diagnostic adaptation factor for an SCR device of the exhaust system based on an on-board diagnostic signal; and inputting an amount of reductant into the SCR device by configuring the exhaust system according to the diagnostic adaptation factor. - View Dependent Claims (17, 18, 19, 20)
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Specification