Patent ID: 9453753
Filing Date: 2016-09-27
CPC Classification: B60K,G01F

Claim Text:
1. A method for measuring pressurized liquid fuel level in a fuel tank used on an industrial vehicle comprising: measuring the pressure of the fuel to generate a pressure signal; measuring the temperature of the fuel to generate a temperature signal; determining a fuel level signal from said pressure signal and said temperature signal by doing one of: subtracting the temperature signal from the pressure signal (P−T) and subtracting the pressure signal from the temperature signal (T−P); detecting changes in said fuel level signal over time; identifying a first point of said fuel level signal indicating approaching emptying of the tank when said pressure signal and said temperature signal become uncorrelated so that changes in said fuel level signal exceed a given value; and signaling said approaching emptying of the tank to an operator of the vehicle in response to identifying said first point.