The invention concerns a pressurized fluid cylinder equipped with a valve accommodating a first draw-off circuit, the valve comprising a member for regulating the flow and/or the pressure of the fluid drawn off via a member for manually controlling the regulating member, the valve comprising an electronic device for displaying data concerning the amount of fluid contained in a cylinder which is connected to the valve, the electronic display device comprising a member for acquiring, storing, and processing data, and at least one data display connected to the data acquisition, storage and processing member.

A process for filling a gas tank made from a gas tank material with gas is provided, which process comprises the following steps: a) setting (S10) a nominal gas filling rate such that the tank is substantially completely filled within a predetermined filling time from a predetermined initial gas pressure value, b) determining (S20), assuming hot case tank conditions, a maximum mass-averaged gas filling temperature that will be reached at the end of the filling process, when filling the gas tank for the predetermined filling time with the nominal gas filling rate, c) selecting (S30) a target gas filling temperature not greater than the maximum mass-averaged gas filling temperature, d) cooling (S40) the gas to be supplied to the gas tank to the target gas filling temperature, e) starting the supply of gas to the gas tank, f) determining (S50) the actual mass-averaged gas filling temperature of the gas supplied to the tank, g) estimating (S60) an end-of-fill gas pressure from the actual mass-averaged gas filling temperature assuming cold case tank conditions, and h) terminating (S70) the supply of gas to the gas tank when the actual pressure of the gas tank is equal to the lower of the end-of-fill gas pressure and a maximum final fill pressure.

The invention relates to a method for filling a hydrogen tank (2) of a motor vehicle (1) comprising a fuel cell drive, wherein the method comprises the steps: (a) determining a first operating time at which the motor vehicle (1) is to be started up and an expected first operating location at which the motor vehicle (1) is to be started up, (b) ascertaining a predicted maximum ambient temperature (T.sub.U,max) at the first operating location at the first operating time, and (c) filling the hydrogen tank with hydrogen (3) until a tank pressure (p) in the hydrogen tank (2) reaches a maximum permissible tank pressure (p.sub.max) at a tank temperature (T), wherein the following applies for the tank temperature (T): tank temperature (T)=[maximum ambient temperature (T.sub.U,max); maximum ambient temperature (T.sub.U,max)+10 K]. The invention relates further to a motor vehicle (1) comprising a hydrogen tank (2), a fuel cell drive and a control system (5) for controlling filling of the hydrogen tank (2), wherein the control system (5) to carry out the method.

A method and a control arrangement for determining the status of a primary fluid tank or one or more secondary fluid tanks, each of the fluid tanks being arranged to contain a fluid or a mixture of fluids available in liquefied form and vaporised form and be connected to a second pressurized fluid conduit arrangement. The control arrangement determines a pressure drop (?p) associated with the fluid flow through the second pressurized fluid conduit arrangement. When the pressure drop (?p) exceeds a threshold, the control arrangement blocks the fluid flow from one of the fluid tanks to the second pressurized fluid conduit arrangement. Based on a subsequently determined pressure drop (?p), the control arrangement determines whether said one of the primary and secondary fluid tanks is empty of liquefied fluid.

A method of refueling a vehicle tank with hydrogen, the refueling is controlled by a refueling station controller, the method including: connecting the tank to the station, initiating the refueling process, during the refueling monitoring the temperature of the gas inside the tank, establishing a pressure stop criterion for the refueling, based on a pressure category of the tank and the monitored temperature of the gas, the establishing of the pressure stop criterion being based on a lookup in a predefined table of a plurality of pressure stop criteria, during the refueling monitoring the pressure of the gas inside the tank, by the controller comparing the pressure of the gas with the pressure stop criterion and terminating the refueling when the pressure of the gas inside the tank has reached the pressure stop criterion, and disconnecting the vehicle and the refueling station.

This method for dispensing cryogenic liquid includes the following steps: connecting, in a sealtight manner, a fuel tank (2) to be filled to a storage tank, dispensing cryogenic liquid to the fuel tank (2) and determining firstly the flow of liquid being dispensed and the amount of liquid dispensed, and secondly the pressure prevailing in the fuel tank (2), stopping the dispensing of the liquid when the pressure exceeds a first predetermined threshold or else when the flow of liquid drops below a second predetermined threshold, degassing the fuel tank (2) after stopping the dispensing, while determining the amount of gas removed from the fuel tank (2) during the degassing, and determining whether or not liquid should be dispensed again on the basis of the amount of gas removed during the degassing.

A tank filling system comprising a first filling coupler that couples to a first set of fittings disposed at a first tank end of a tank; a second filling coupler that couples to a second set of fittings disposed at a second tank end of the tank; a fluid source; a set of fluid lines and one or more fluid valves that communicate fluid from the fluid source to the first and second filling couplers; and a computing device configured to control the one or more fluid valves. In some examples, the tank can comprise an elongated folded tank having a plurality of elongated rigid tubing portions having a first diameter, a plurality of connector portions having a second diameter that is smaller than the first diameter and flexible corrugations and a rigid cuff, and taper portions disposed between and coupling successive tubing portions and connector portions.

A gas supply system (2) includes a compressor unit (21), an accumulator unit (23), a pre-cooling system (24) and a housing (4). In the gas supply system (2), the compressor unit (21) is vertically arranged and the pre-cooling system (24) is arranged above the accumulator unit (23) in the housing (4). The compressor unit (21) and the accumulator unit (23) are covered by one rectangular parallelepiped housing (4).

An overfill protection means for storing liquefied gases in a tank container, comprising a housing into which the filling line runs for filling the tank container, a closure which is arranged so as to be movable between a closing position preventing filling and an open position releasing filling, and a float, which float is coupled to a trigger mechanism. The trigger mechanism is movable by the float between an engaged position and a release position depending on the liquid level in the tank container, wherein, in the engaged position, the trigger mechanism engages the closure and keeps the closure in the open position, while being supported on the housing, and wherein, in the release position, the trigger mechanism releases the closure, whereby the closure is movable into the closing position by the flowing liquefied gas.

Gas pressure actuated fill termination valves for cryogenic liquid storage tanks and storage tanks containing the same.