US 11,719,173 B2
Method and gas fuel injection unit for operating an internal combustion engine
Robert Graumueller, Kiel (DE)
Assigned to Caterpillar Motoren GmbH & Co. KG, Kiel (DE)
Appl. No. 17/778,761
Filed by Caterpillar Motoren GmbH & Co. KG, Kiel (DE)
PCT Filed Nov. 12, 2020, PCT No. PCT/EP2020/025510
§ 371(c)(1), (2) Date May 20, 2022,
PCT Pub. No. WO2021/098983, PCT Pub. Date May 27, 2021.
Claims priority of application No. 1917070 (GB), filed on Nov. 22, 2019.
Prior Publication US 2023/0014909 A1, Jan. 19, 2023
Int. Cl. F02D 19/02 (2006.01); F02D 41/00 (2006.01); F02M 21/02 (2006.01); F02D 41/40 (2006.01)
CPC F02D 19/022 (2013.01) [F02D 41/0027 (2013.01); F02M 21/0245 (2013.01); F02M 21/0248 (2013.01); F02D 41/401 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for operating an internal combustion engine provided as a medium-speed gas engine or dual fuel engine in a gas fuel mode, comprising the step of directly injecting a gas fuel into a combustion chamber of the engine at a maximum injection pressure that is lower than a compression-end pressure of the engine.