Patent ID: 11933241
Assignee: FCA US LLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fuel delivery system for a vehicle having an engine configured to selectively operate between a port fuel injection (PFI) mode, a gasoline direct injection (GDI) mode, and a port and direct fuel injection (PDI) mode, the fuel delivery system comprising:
a PFI system including a plurality of PFI injectors configured to supply fuel to the engine during the PFI mode;
a GDI system including a plurality of GDI injectors configured to supply fuel to the engine during the GDI mode; and
a fuel system monitor configured to:
monitor the fuel delivery system when operating in the PFI mode, and attribute any fuel delivery system malfunctions occurring during the PFI mode to the PFI system alone;
monitor the fuel delivery system when operating in the GDI mode, and attribute any fuel delivery system malfunctions occurring during the GDI mode to the GDI system alone; and
monitor the fuel delivery system when operating in the PDI mode, and attribute any fuel delivery system malfunctions occurring during the PDI mode as a general fuel system fault,

wherein the fuel system monitor is configured to monitor a short term fuel trim (STFT) and a long term fuel trim (LTFT) to determine if the fuel delivery system malfunctions occur during the PFI mode, the GDI mode, or the PDI mode.