Fuel system for installation in a gas-powered vehicle, and method for controlling such a fuel system

EP4680884A1Pending Publication Date: 2026-01-21VOITH HYSTECH GMBH
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Patent Information

Application Number
EP2024712179
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-03-13
Filing Date
2024-03-12
Publication Date
2026-01-21

AI Technical Summary

Technical Problem

Existing fuel systems for hydrogen-powered vehicles lack flexibility in hydrogen delivery and are inefficient in using stored hydrogen, requiring complex and costly setups with numerous valves.

Method used

A method and system that electronically control tank valves and a pressure reducer based on pressure limits (G1, G2, G3) to adapt hydrogen delivery to consumer needs, allowing flexible operation and extending high-pressure availability without increasing system complexity or cost, using standard tank valves and potentially distributing load across multiple pressure tanks.

Benefits of technology

Enables flexible and efficient hydrogen delivery, extending the operational time at maximum pressure and reducing mechanical stress on pressure tanks, thus enhancing the service life and reliability of the fuel system.

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    Figure EP2024056471_19092024_PF_FP_ABST
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Abstract

The invention relates to a method for controlling a fuel system (10, 10') for a hydrogen-powered vehicle, comprising a plurality of pressure tanks each having a tank valve, and to a fuel system for such a method. In the method, a first limit pressure G1, a second limit pressure G2 and a third limit pressure G3 are defined, wherein the maximum pressure in the pressure tank > G1 > G2 > G3, and wherein, during operation of the hydrogen consumer, the controller (14) controls the tank valves (5, 6, 7, 8) and the pressure reducer (12), which is electronically controllable, on the basis of the pressure in the pressure tanks (1, 2, 3, 4) and the pressure required in the outlet line (13), as follows: a) all tank valves (5, 6, 7, 8) are opened if the pressure in all pressure tanks (1, 2, 3, 4) is higher than G1; b) the first tank valve (5) is closed and the further tank valves (6, 7, 8) are opened if the pressure in the further pressure tanks (2, 3, 4) lies between G1 and G2; c1) only the first tank valve (5) is opened and the further tank valves (6, 7, 8) are closed if the pressure in the first pressure tank is higher than G2, the pressure in the further pressure tanks (1, 2, 3, 4) is lower than G2 and the pressure required in the outlet line (13) is equal to G2 or lies between G2 and G3; c2) the first tank valve (5) is closed and the further tank valves (6, 7, 8) are opened if the pressure in the first pressure tank is higher than G2, the pressure in the further pressure tanks (1, 2, 3, 4) lies between G2 and G3 and the pressure required in the outlet line (13) is equal to G3 or lower than G3.
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