PRESSURE AND FLOW CONTROL FOR FIXED DISPLACEMENT PUMP IN REDUCTANT DOSING SYSTEM
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United States of America
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Feb 20, 2020
app pub date -
Apr 5, 2018
filing date -
Apr 5, 2018
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Abstract
A reductant dosing system includes: a doser; a fixed displacement pump in fluid communication with the doser; a reductant source in fluid communication with the fixed displacement pump; and a controller communicatively coupled to the fixed displacement pump to control operation of the fixed displacement pump, wherein the controller is programmed to operate the fixed displacement pump using a pressure control system responsive to data indicative of the doser not dosing reductant and the controller is programmed to operate the fixed displacement pump using a flow control system responsive to data indicative of the doser dosing reductant.
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