US 12,392,266 B2
Hydrogen combustion engine and passenger car and commercial vehicle
Christoph Luven, Stuttgart (DE); Alexander Mueller, Metzingen (DE); and Alexander Puck, Esslingen (DE)
Assigned to Mahle International GmbH, (DE)
Filed by MAHLE International GmbH, Stuttgart (DE)
Filed on Jun. 26, 2023, as Appl. No. 18/213,887.
Claims priority of application No. 10 2022 206 387.2 (DE), filed on Jun. 24, 2022.
Prior Publication US 2024/0229687 A1, Jul. 11, 2024
Int. Cl. F01L 3/14 (2006.01); F01L 3/20 (2006.01)
CPC F01L 3/14 (2013.01) [F01L 3/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A hydrogen combustion engine for a passenger car, comprising
at least one cylinder having a combustion chamber,
a metallic hollow valve for the introduction of hydrogen into the combustion chamber or/and for directing exhaust gas out from the combustion chamber, wherein the hollow valve comprises a tubular valve shaft extending along an axial direction, which along the axial direction passes over into a valve plate with an enlarged external diameter compared to the valve shaft,
wherein the valve shaft and the valve plate delimit a cavity,
wherein a cavity diameter of the cavity, measured transversely to the axial direction, in a region of the valve shaft is between 3.0 mm and 4.4 mm,
wherein a wall thickness of the hollow valve, measured transversely to the axial direction in the region of the valve shaft is between 0.8 mm and 1.4 mm,
wherein the cavity is at least partially filled with a cooling medium, and
wherein in addition to the cooling medium, a non-evaporable getter alloy is present, which contains at least one of the following components:
zirconium,
vanadium,
iron
manganese, and
at least one rare earth metal.