US 11,732,660 B2
Method for operating an internal combustion engine
Thomas Malischewski, Heilsbronn (DE)
Assigned to MAN TRUCK & BUS SE, Munich (DE)
Appl. No. 17/273,083
Filed by MAN Truck & Bus SE, Munich (DE)
PCT Filed Sep. 6, 2019, PCT No. PCT/EP2019/073794
§ 371(c)(1), (2) Date Mar. 3, 2021,
PCT Pub. No. WO2020/053081, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 10 2018 122 342.0 (DE), filed on Sep. 13, 2018.
Prior Publication US 2021/0189979 A1, Jun. 24, 2021
Int. Cl. F02D 41/00 (2006.01); F02D 13/02 (2006.01); F02M 26/05 (2016.01)
CPC F02D 41/0002 (2013.01) [F02D 13/0207 (2013.01); F02D 13/0261 (2013.01); F02D 13/0273 (2013.01); F02D 2041/001 (2013.01); F02D 2200/0802 (2013.01); F02M 26/05 (2016.02)] 19 Claims
OG exemplary drawing
 
1. A method for operating an internal combustion engine, comprising:
producing a pressure pulse in an exhaust line of the internal combustion engine;
feeding exhaust gas from a combustion chamber of a cylinder into an inlet passage of the cylinder during an exhaust stroke of the cylinder by means of propagation of the pressure pulse from the exhaust line into the combustion chamber of the cylinder; and
feeding the exhaust gas from the inlet passage of the cylinder into the combustion chamber of the cylinder during an inlet stroke of the cylinder; and
one or more of:
operating the internal combustion engine in a range of up to 40% of load, while the pressure pulse is being produced, exhaust gas is being fed from the combustion chamber, and the exhaust gas is being fed from the inlet passage; or
operating the internal combustion engine between 800 rpm and 1400 rpm, while the pressure pulse is being produced, exhaust gas is being fed from the combustion chamber, and the exhaust gas is being fed from the inlet passage
wherein:
a valve timing curve of the inlet valve of the cylinder is invariable; and/or
a valve timing curve of the inlet valve of the cylinder is implemented by a non-switchable and/or rigid cam of a camshaft of the internal combustion engine, and/or
an actuating device for actuating the inlet valve of the cylinder is rigid and/or non-switchable.