Systems and methods may be provided for monitoring a fuel level of a vehicle. The fuel may be a gaseous fuel, such as natural gas. An electronic control unit may be able to receive a signal from one or more sensors. The electronic control unit may provide a command to drive a fuel gauge to display the fuel level. The electronic control unit may determine the gauge command based on the received signal and a filling compensation scheme. The electronic control unit may be initialized through a user interface. A filling compensation scheme may be selected during initialization. The electronic control unit may be capable of communicating various sensors, gauges, devices, controls and/or other ECUs of varying specifications.

A fuel gas tank arrangement in a vehicle. The fuel gas tank arrangement comprises a fuel gas tank for holding a pressurized fuel gas volume, and a valve configured to ventilate fuel gas from the fuel gas tank into ambient surroundings. The valve comprises a controllable valve actuator communicatively connected to a control unit. The valve actuator is configured to open the valve to a determined opening degree for controlling a flow rate of ventilated fuel gas. The disclosure also relates to method for safety ventilation of fuel gas from a fuel gas tank arrangement.

A system and method for configuring parameters for a variable gaseous appliance, comprise a sensor for detecting a composition of the gaseous fuel in a fuel tank. A first set of instructions are executable on a processor for receiving a signal from the sensor and analyzing the gaseous fuel based on the Wobbe Index, methane index, and inert gas percentage, to produce a gaseous fuel analysis. A second set of instructions are executable on the processor for producing a signal for configuring parameters of the engine for running the engine based on the gaseous fuel analysis.

Systems and methods may be provided for monitoring a fuel level of a vehicle. The fuel may be a gaseous fuel, such as natural gas. An electronic control unit may be able to receive a signal from one or more sensors. The electronic control unit may provide a command to drive a fuel gauge to display the fuel level. The electronic control unit may determine the gauge command based on the received signal and a filling compensation scheme. The electronic control unit may be initialized through a user interface. A filling compensation scheme may be selected during initialization. The electronic control unit may be capable of communicating various sensors, gauges, devices, controls and/or other ECUs of varying specifications.

A vehicle has a fuel system that includes a controller that determines when the vehicle is in a refuel mode or a run mode based on a connection of a refuel nozzle to a vehicle connection of the vehicle. The controller controls a fuel pump input selector, a vehicle fuel pump, and a fill/run fuel selector such that fuel is pumped from a storage tank external to the vehicle into a vehicle fuel tank by way of the vehicle fuel pump in the refuel mode, and fuel is pumped to an engine of the vehicle from the vehicle fuel tank by way of the vehicle fuel pump in the run mode.

A pressurized container system for a motor vehicle includes a pressurized container configured to store a fuel, wherein the pressurized container system has a shut-off valve which is configured to interrupt, in a currentless state, a fluid connection between the pressurized container and at least one fuel gas consumer. A safety switch is configured to interrupt a power supply to the shut-off valve, where the safety switch is not an ignition switch of the motor vehicle.

A vehicle including a pressurized liquid fuel system includes a first pressurized liquid fuel tank arrangement, a second pressurized liquid feel tank arrangement, and a balancing conduit open to a first fuel tank and to a second fuel tank at least one of above a maximum liquid level of the first fuel tank and a maximum liquid level of the second fuel tank and below a minimum liquid level of the first fuel tank and a minimum liquid level of the second fuel tank. A first return line and a second return line to the first and second fuel tanks are configured such that a pressure drop across the first, return line from a pressurized liquid fuel circulation system to the first fuel tank is adapted to be the same as a pressure drop across the second return line from the pressurized liquid fuel circulation system to the second fuel tank. Methods for operating a pressurized liquid fuel system are also disclosed.

A gas system includes a container, a fitting, a gas tube, adsorbent, and a filter. The container stores gas under pressure. The fitting covers an opening of the container and maintains a seal with the opening of the container. The gas tube is inserted through a bore in the fitting such that a length of a portion of the gas tube inside of the container is at least one half of a length of the container. The portion of the gas tube in the container includes holes. The adsorbent is in a particulate form and adsorbs gas in the container. The filter covers the holes in the portion of the gas tube in the container. The filter permits passage of gas into and out of the gas tube and prevents passage of the adsorbent into the gas tube.

A vehicle includes a plurality of tanks storing gas in the tanks and arranged in a longitudinal direction of the vehicle, and each of the tanks includes: a pressure relief device configured to open when a temperature of the tank becomes a predetermined temperature or more; and a release part releasing the gas in the tank in a predetermined direction by the opening of the pressure relief device, wherein the release direction of the gas released from the release part of the front tank located at a frontward position among the plurality of tanks is defined to be a direction directly facing a space between the pressure relief devices of the rear tanks disposed more rearward than the front tank, and a ground.

A cryogenic pump includes a pressurization assembly configured to be submerged in a cryogenic liquid; a hydraulic actuation assembly; and a transmission assembly in communication between the pressurization assembly and the hydraulic actuation assembly. The transmission assembly including a conduit having a first end adjacent the hydraulic actuation assembly and a second end adjacent the pressurization assembly. The conduit is configured to contain a material having a first state at the first end and a different second state at the second end.