NO.sub.x reduction system with a device for metering reducing agents
First Claim
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1. An NOx reduction system for an internal combustion engine operating with excess air, comprising:
- an SCR catalytic converter arranged in an exhaust system of an internal combustion engine;
a reducing agent container for storing reducing agent;
a metering device communicating with said reducing agent container for controlled delivery of the reducing agent into the exhaust system upstream of said SCR catalytic converter in a direction of exhaust gas flow in the exhaust system; and
a control device assembly integrated in said reducing agent container for controlling the NOx reduction system, said control device assembly being a functional unit comprising a control device and associated sensors and actuators for storing, feeding, conditioning, and metering the reducing agent.
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Abstract
A NOx reduction system includes an SCR catalytic converter and a metering assembly for reducing agent. A control unit for the reduction system is integrated together with the actuators and sensors as a functional unit at the reducing agent container. This provides savings in terms of lines and plug-in connections, and relieves the burden on the control unit of the internal combustion engine.
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Citations
11 Claims
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1. An NOx reduction system for an internal combustion engine operating with excess air, comprising:
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an SCR catalytic converter arranged in an exhaust system of an internal combustion engine; a reducing agent container for storing reducing agent; a metering device communicating with said reducing agent container for controlled delivery of the reducing agent into the exhaust system upstream of said SCR catalytic converter in a direction of exhaust gas flow in the exhaust system; and a control device assembly integrated in said reducing agent container for controlling the NOx reduction system, said control device assembly being a functional unit comprising a control device and associated sensors and actuators for storing, feeding, conditioning, and metering the reducing agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification