Validation method for pressure sensor signal at electrical controlled high pressure gas storage systems
AssigneeGM Global Technology Operations LLC
InventorsOliver Maier, Markus Noll
Life of this patent
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Abstract
A method for validating a pressure sensor between a source of a gas and a pressure regulator that regulates a gas flow. The method includes providing a valve command signal and selecting a bias signal from a bias table. The method also includes comparing the selected bias signal to the valve command signal and determining there is a pressure sensor error if the difference between the selected bias signal and the valve command signal is above a predetermined threshold.
Claims20
A method for validating a pressure sensor between a gas source and a pressure regulator that regulates the pressure of a gas flow from the gas source, said method comprising:
- injecting a flow of the gas from the source into a device using at least one injector;
- controlling the pressure of the gas within a volume of an input line that is between the pressure regulator and the injector using the pressure regulator, wherein the pressure regulator operates according to a valve command signal from a controller;
- providing a look-up table, wherein a bias signal for opening the pressure regulator is selected using the look-up table;
- comparing the selected bias signal to the valve command signal;
- and
- determining there is a pressure sensor error if the difference between the selected bias signal and the valve command signal is above a predetermined threshold value.
A method for validating a pressure sensor between a gas source and a pressure regulator that regulates a gas flow from the gas source, said method comprising:
- providing a valve command signal that determines a position of an orifice of the pressure regulator, wherein the position of the orifice is synchronized to an opening and closing of at least one injector that is used to inject a flow of the gas from the source into a device;
- providing a bias table, wherein a controller uses the bias table to select a bias signal for opening the pressure regulator a desired amount for a desired gas flow to the injector;
- comparing the selected bias signal to the valve command signal;
- and
- determining there is a pressure sensor error if the difference between the selected bias signal and the valve command signal is above a predetermined threshold.
A method for validating a pressure sensor between a gas source and a pressure regulator that regulates a gas flow from the gas source, said method comprising:
- providing a gas mass flow request signal;
- providing a pressure measurement signal of a pressure of the gas source using the pressure sensor;
- setting the mass flow request signal and the pressure measurement signal to a two-dimensional look-up table, wherein the look-up table is used to select a proper bias signal for opening an orifice of the pressure regulator;
- providing a valve command signal that determines the position of the orifice of the pressure regulator, wherein the valve command signal is determined based on a pressure request signal for a volume of gas in an input line and an actual pressure measurement signal of the volume of gas in the input line;
- comparing the selected bias signal from the look-up table to the valve command signal;
- and
- determining there is a pressure sensor error if a difference between the selected bias signal and the valve command signal reaches a predetermined threshold value.
Dependencies are inferred from the claim text.