US 12,421,923 B2
Internal combustion engine for gaseous fuels
Fabian Fischer, Waiblingen (DE); Marco Beier, Rudolstadt (DE); Oezguer Tuerker, Gerlingen (DE); Stefan Stein, Stuttgart (DE); and Torsten Burock, Vaihingen An der Enz (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/715,310
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Nov. 28, 2022, PCT No. PCT/EP2022/083412
§ 371(c)(1), (2) Date May 31, 2024,
PCT Pub. No. WO2023/099376, PCT Pub. Date Jun. 8, 2023.
Claims priority of application No. 10 2021 213 604.4 (DE), filed on Dec. 1, 2021.
Prior Publication US 2025/0027462 A1, Jan. 23, 2025
Int. Cl. F02M 21/02 (2006.01)
CPC F02M 21/0242 (2013.01) [F02M 21/0206 (2013.01); F02M 21/0293 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An internal combustion engine for gaseous fuels having a combustion chamber (2) in which gaseous fuel is burned, in which the gaseous fuel is kept at an operating pressure in a gas tank (7) and fed to the combustion chamber (2) via a supply line (6), and having an exhaust gas catalytic converter (14) which is connected to the combustion chamber (2) via an exhaust pipe (13), and having a fresh air line (10) via which ambient air is supplied to the combustion chamber (2), wherein
a pressure relief line (16; 16′) with a switchable release valve (17; 17′) branches off from the supply line 6, via which the gaseous fuel can be discharged from the supply line (6);
wherein the pressure relief line (16; 16′) opens into the exhaust pipe (13) upstream of the exhaust gas catalytic converter (14).