Patent ID: 11920536
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fuel pump system for a vehicle, comprising:
a primary fuel pump;
a fuel tank;
an auxiliary fuel pump in-line with the primary fuel pump and fluidly connected to the fuel tank;
an electronic control circuit, the electronic control circuit including a processing device;
a pressure sensor configured to measure an output pressure from the auxiliary fuel pump and to transmit a signal corresponding to the output pressure to the electronic control circuit;
an electric motor configured to drive the auxiliary fuel pump at an operational motor speed, wherein the electric motor is electrically connected to the electronic control circuit; and
wherein the electronic control circuit is configured to continuously adjust the operational motor speed via the processing device, based on the signal from the pressure sensor to maintain a predetermined constant output pressure, and
wherein the electronic control circuit is further configured to sense a failure or disconnect in the pressure sensor or the processing device and to automatically switch control of the operational motor speed from the processing device to a fixed source that is configured to provide a fixed, predetermined operating voltage or power corresponding to a predetermined, safe speed in response to sensing the failure or disconnect, wherein the fixed source is a potentiometer pre-set to a fixed voltage corresponding to the predetermined safe speed.