System and methods for fuel level inference

摘要

A method for a fuel system, comprising: monitoring a fuel tank pressure during a refueling event; determining a fuel flow rate based on a steady-state portion of the monitored fuel tank pressure; and indicating an amount of fuel added to a fuel tank based on the fuel flow rate. In this way, a fuel tank fill level can be determined following a refueling event, even in a scenario where the fuel level indicator is stuck or malfunctioning.

主权项

1. A method, comprising:
before a refueling event, opening an isolation tank valve and a canister vent valve via respective actuators; maintaining the isolation tank valve and the canister vent valve open during the refueling event; and indicating, to a vehicle operator, a fuel level of a fuel tank based on a steady-state fuel tank pressure during the refueling event.