公开(公告)号：US12241434B2

公开(公告)日：2025-03-04

申请号：US18228869

申请日：2023-08-01

Applicant: Caterpillar Inc.

Inventor： Curtis J Caldwell ,  Seth Ost ,  Brian Kacynski

IPC: B60L50/75 ,  E02F9/08 ,  F02M21/02

Abstract: A hydrogen fuel system for a work machine is disclosed. The hydrogen fuel system comprises a hydrogen storage tank containing hydrogen, the hydrogen being at least one of a liquid hydrogen or a gaseous hydrogen; a hydrogen power unit configured to consume the hydrogen from the hydrogen storage tank, the hydrogen power unit including at least one of a plurality of fuel cells or a hydrogen combustion engine; a boil-off pressure relief valve in fluid communication with the hydrogen storage tank; and a tank pressure sensor in communication with the boil-off pressure relief valve. The boil-off pressure relief valve is configured to, when the tank pressure sensor detects a pressure inside the hydrogen storage tank that exceeds a boil-off pressure threshold, vent the gaseous hydrogen to a boil-off fuel line fluidly connected to the hydrogen power unit.

公开(公告)号：US20250043752A1

公开(公告)日：2025-02-06

申请号：US18228869

申请日：2023-08-01

Applicant: Caterpillar Inc.

Inventor： Curtis J. Caldwell ,  Seth Ost ,  Brian Kacynski

IPC: F02M21/02 ,  E02F9/08

Abstract: A hydrogen fuel system for a work machine is disclosed. The hydrogen fuel system comprises a hydrogen storage tank containing hydrogen, the hydrogen being at least one of a liquid hydrogen or a gaseous hydrogen; a hydrogen power unit configured to consume the hydrogen from the hydrogen storage tank, the hydrogen power unit including at least one of a plurality of fuel cells or a hydrogen combustion engine; a boil-off pressure relief valve in fluid communication with the hydrogen storage tank; and a tank pressure sensor in communication with the boil-off pressure relief valve. The boil-off pressure relief valve is configured to, when the tank pressure sensor detects a pressure inside the hydrogen storage tank that exceeds a boil-off pressure threshold, vent the gaseous hydrogen to a boil-off fuel line fluidly connected to the hydrogen power unit.