Control apparatus and control method for reducing agent supply apparatus
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United States of America Patent
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Nov 14, 2017
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N/A
app pub date -
May 19, 2014
filing date -
Jun 10, 2013
priority date (Note) -
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Abstract
The control method for reducing agent supply apparatuses, when a liquid reducing agent is frozen, unfreezes the frozen liquid reducing agent using a heating device and enables the injection control of the liquid reducing agent in an exhaust passage of the internal combustion engine. The control method includes determining the necessity of unfreezing of the liquid reducing agent and calculating the necessary time required for the unfreezing when the speed of the internal combustion engine exceeds a predetermined threshold during startup of the internal combustion engine and permitting the injection control of the liquid reducing agent when the unfreezing is not necessary or the unfreezing is completed.
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