Abgasreinigungssystem für Verbrennungsmotor und Abgasreinigungsverfahren

Details

Veröffentlichungs-Nr.

EP3613958

Aktenzeichen

EP19187897

Anmeldetag

23. Juli 2019

Veröffentlichung

23. Juni 2021

Erteilung

23. Juni 2021

Rechtsraum

EP

IPC

F01N3/08F01N13/00F01N1/14F01N3/22F01N3/30

Abstract

An exhaust purification system of an internal combustion engine comprises an HC adsorbent 20 arranged adsorbing HC in exhaust gas, an NOx adsorbent 20 adsorbing NOx in exhaust gas, a catalyst 24 removing HC and NOx at a predetermined air-fuel ratio, an air-fuel ratio control part 31 configured to control an air-fuel ratio of exhaust gas, and an HC concentration calculating part 32 configured to calculate a concentration of HC desorbed from the HC adsorbent. A peak of a desorption temperature of HC at the HC adsorbent and a peak of a desorption temperature of NOx at the NOx adsorbent are substantially the same. The air-fuel ratio control part is configured to control an air-fuel ratio of inflowing exhaust gas flowing into the catalyst to the predetermined air-fuel ratio based on the concentration of HC calculated by the HC concentration calculating part when HC is desorbed from the HC adsorbent.

Anmelder

Firma

TOYOTA JIDOSHA KABUSHIKI KAISHA

Land

🇯🇵 Japan

Fachgebiete