US 11,668,223 B2
Reduction method for reducing the oxygen content in the catalytic converter, engine arrangement and vehicle
Marc-Andre Golkowski, Garbsen (DE); Stephan Schemann, Wolfsburg (DE); Christian Arenz, Braunschweig (DE); and Christopher Lueck, Berlin (DE)
Assigned to Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed by Volkswagen Aktiengesellschaft, Wolfsburg (DE)
Filed on Nov. 17, 2021, as Appl. No. 17/528,800.
Claims priority of application No. 10 2020 214 435.4 (DE), filed on Nov. 17, 2020.
Prior Publication US 2022/0154622 A1, May 19, 2022
Int. Cl. F01N 3/36 (2006.01); F02D 41/40 (2006.01)
CPC F01N 3/36 (2013.01) [F02D 41/402 (2013.01); F02D 2200/0614 (2013.01); F02D 2200/0814 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A reduction method for a catalytic converter in an exhaust system of an internal combustion engine for reducing an oxygen content in the catalytic converter, the method comprising:
performing a first injection of fuel into a first cylinder, the first injection taking place during an exhaust stroke of a first working cycle of the first cylinder which is after an ignition point in time of a compression stroke of the first working cycle of the first cylinder; and
introducing the injected fuel from the first cylinder into the catalytic converter during the exhaust stroke of the first cylinder.