HYBRID VEHICLE CONTROL
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United States of America Patent
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Issued Date -
Dec 19, 2013
app pub date -
Jun 15, 2012
filing date -
Jun 15, 2012
priority date (Note) -
Abandoned
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Abstract
A method and powertrain apparatus for controlling a hybrid electric vehicle powertrain to maintain a catalyst within a catalytic converter at an efficient operating temperature while also maximizing the use of electric vehicle operating mode. The method and apparatus determine, during an electric vehicle operating mode, whether a catalyst efficiency is below a predetermined threshold and, if it is determined that the catalyst efficiency is below the predetermined threshold, suspend the electric vehicle operating mode and turn on the vehicle's engine to bring the catalyst efficiency to or above the predetermined threshold.
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