A vehicle gas fuel management system includes an ambient temperature sensor that detects a first ambient temperature at a first time and a second ambient temperature at a second time, a pressure sensor that detects a pressure for a volume of gas at the first time, and a controller. The controller is programmed to determine a first enthalpy and density for the volume of gas based upon the detected first ambient temperature and detected pressure, and estimate a second enthalpy for the volume of gas based upon the second ambient temperature and the first energy state.

A cryogenic fluid delivery system includes a tank adapted to contain a supply of cryogenic liquid, with the tank including a head space adapted to contain a vapor above the cryogenic liquid stored in the tank. A liquid withdrawal line is adapted to communicate with cryogenic liquid stored in the tank. A vaporizer has an inlet that is in communication with the liquid withdrawal line and an outlet that is in communication with a vapor delivery line. A pressure building circuit is in communication with the vapor delivery line and the head space of the tank. The pressure building circuit includes a flow inducing device and a control system for activating the flow inducing device when a pressure within the head space of the tank drops below a predetermined minimum pressure and/or when other conditions exist.

A vehicle fuel system is provided that includes a fuel tank and a manual vent system. The manual vent system includes an emergency valve and an actuator. The manual vent system is configured to cause the emergency valve to open after the actuator has been actuated.

A control unit (130, 700) arranged to control heating of a gas tank (120) for powering a concrete surface processing machine (100), wherein the concrete surface processing machine (100) comprises an electrical system (210) associated with a maximum allowable load, wherein the control unit (130, 700) comprises an input port (721) for receiving a signal associated with a present load of the electrical system (210), wherein the control unit (130, 700) comprises an output port (722) arranged to control an electrical heating element (220) associated with the gas tank (120), where the control unit (130, 700) is arranged to control the heating element (220) in dependence of the current load of the electrical system in relation to the maximum allowable load of the electrical system (210).

A tank assembly includes a tank, at least one pressure relief valve, at least one heat transmission path, and at least one heat transmission element. The at least one pressure relief valve is configured to allow a pressure relief of the tank when a temperature threshold value at the pressure relief valve is exceeded. The heat transmission path and the pressure relief valve are connected via the at least one heat transmission element. The heat transmission element is changeable with respect to the heat transmission between the heat transmission path and the pressure relief valve.

A fuel management module for use with a CNG fuel system for a vehicle includes a housing configured to be connected to the vehicle and a number of connections, receptacles, and controls associated with the module. A defueling receptacle may be positioned on the front panel of the housing, for defueling a fuel tank of the vehicle. A defueling control valve may be positioned on the front panel of the housing for controlling operation of the defueling receptacle, allowing for selective defueling. One or more high pressure connections may be accessible on the housing and configured for connection to one or more separate fuel tanks in a plug and play configuration. A plurality of filling connections may be accessible on the housing for filling the fuel tank(s). A low pressure fuel output connection may be positioned on the back panel of the housing to provide fuel output from the high pressure connections to the engine.

A vehicle fuel system is provided that includes a fuel tank and a manual vent system. The manual vent system includes an emergency valve and an actuator. The manual vent system is configured to cause the emergency valve to open after the actuator has been actuated.

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.

A fuel management module for use with a CNG fuel system for a vehicle includes a housing configured to be connected to the vehicle and a number of connections, receptacles, and controls associated with the module. A defueling receptacle may be positioned on the front panel of the housing, for defueling a fuel tank of the vehicle. A defueling control valve may be positioned on the front panel of the housing for controlling operation of the defueling receptacle, allowing for selective defueling. One or more high pressure connections may be accessible on the housing and configured for connection to one or more separate fuel tanks in a plug and play configuration. A plurality of filling connections may be accessible on the housing for filling the fuel tank(s). A low pressure fuel output connection may be positioned on the back panel of the housing to provide fuel output from the high pressure connections to the engine.

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.