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

Claim 10:
11. A method of monitoring a fuel delivery system of a vehicle having an engine with a fuel system monitor, a port fuel injection (PFI) system, and a gasoline direct injection (GDI) system, the engine configured to selectively operate between a PFI mode, a GDI mode, and a port and direct fuel injection (PDI) mode, the method comprising:
monitoring, via the fuel system monitor, the fuel delivery system when operating in the PFI mode, and attributing any fuel delivery system malfunctions occurring during the PFI mode to the PFI system alone;
monitoring, via the fuel system monitor, the fuel delivery system when operating in the GDI mode, and attributing any fuel delivery system malfunctions occurring during the GDI mode to the GDI system alone; and
monitoring, with the fuel system monitor, a short term fuel trim (STFT) and a long term fuel trim (LTFT) to determine if the fuel delivery system malfunction occurs during the PFI mode, the GDI mode, or the PDI mode.