Methods and systems for dual fuel injection
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United States of America Patent
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Dec 18, 2018
Grant Date -
Sep 20, 2018
app pub date -
May 16, 2018
filing date -
Nov 6, 2015
priority date (Note) -
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Abstract
Methods and systems are provided for reducing port injection fuel errors by selectively reactivating a direct fuel injector. Responsive to an increase in driver demand received while delivering fuel to a cylinder via port injection only, wherein the increase in driver demand is received late in the port injection window, the port injection error is addressed by reactivating a direct injector on the same engine cycle and delivering at least a portion of the fuel mass corresponding to the error via the direct injector. Additionally, a portion of the fuel mass may be delivered by the port injector on the same engine cycle by extending the end of injection timing, if possible.
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