Abgasreinigungssystem der Brennkraftmaschine und Verfahren zur Abgasreinigung

Details

Veröffentlichungs-Nr.

EP3613959

Aktenzeichen

EP19192557

Anmeldetag

20. August 2019

Veröffentlichung

28. Juli 2021

Erteilung

28. Juli 2021

Rechtsraum

EP

IPC

F01N13/00F01N3/08F01N9/00

Abstract

An exhaust purification system of an internal combustion engine 50 comprises: an adsorbent 20 adsorbing HC and NOx in exhaust gas, a catalyst 24 removing HC and NOx, an air-fuel ratio control part 31 configured to control an air-fuel ratio of exhaust gas discharged from an engine body of the internal combustion engine to the exhaust passage, and a temperature calculating part 32 configured to calculate a temperature of the adsorbent. At the adsorbent, a desorption temperature of HC is higher than a desorption temperature of NOx. The air-fuel ratio control part is configured to make the air-fuel ratio a stoichiometric air-fuel ratio when a temperature of the adsorbent is in the vicinity of the desorption temperature of NOx, then make the air-fuel ratio leaner than the stoichiometric air-fuel ratio when the temperature of the adsorbent reaches the vicinity of the desorption temperature of HC.

Anmelder

Firma

TOYOTA JIDOSHA KABUSHIKI KAISHA

Land

🇯🇵 Japan

Fachgebiete