Fuel injection system and method
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United States of America Patent
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Mar 20, 2018
Issued Date -
N/A
app pub date -
Dec 16, 2015
filing date -
Dec 16, 2015
priority date (Note) -
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Abstract
A combination port fuel injection (PFI) and direct injection (DI) dual path fuel injection system includes an electronic control unit (ECU) that switches between the PFI portion and the DI portion depending on the engine operating point and fuel flow requirements. During transitions in engine loading, the ECU instructs the PFI portion to increase injection for a limited amount of time, while instructing the DI portion to maintain a current injection. Subsequently, fueling is transitioned from the PFI portion back to the DI portion. Advantageously, the combination PFI and DI dual path fuel injection system mitigates the emission of particles during transient engine operating conditions.
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