Global Patent Index - EP 1030043 A2

EP 1030043 A2 2000-08-23 - Exhaust gas purification device for engine

Title (en)

Exhaust gas purification device for engine

Title (de)

Abgasreinigungsvorrichtung für einen Motor

Title (fr)

Dispositif de purification de gaz d'échappement pour un moteur

Publication

EP 1030043 A2 (EN)

Application

EP 00103087 A

Priority

JP 3665899 A

Abstract (en)

In an exhaust system of an internal combustion engine, an SOx reduction catalyst is disposed upstream of an NOx reduction catalyst. A controller calculates an SOx storage quantity in the SOx reduction catalyst, estimates an SOx trap rate of the SOx reduction catalyst from parameters such as the SOx storage quantity and an exhaust temperature, and further estimates an SOx concentration in the exhaust gas mixture flowing into the NOx reduction catalyst. Thus, the controller monitors the SOx concentration during a lean combustion operation of the engine, and switches the engine operating mode to a temporary enrichment mode to reduce the SOx from the SOx reduction catalyst when the SOx concentration exceeds a predetermined threshold. <IMAGE>

IPC 1-7 (main, further and additional classification)

F02D 41/02

IPC 8 full level (invention and additional information)

F01N 3/08 (2006.01); F01N 3/20 (2006.01); F01N 3/24 (2006.01); F02D 41/02 (2006.01); F01N 13/02 (2010.01)

CPC (invention and additional information)

F02D 41/0285 (2013.01); F01N 13/009 (2014.06); F02D 2041/1433 (2013.01)

Citation (applicant)

JP H06229231 A 19940816 - TOYOTA MOTOR CORP

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 1030043 A2 20000823; EP 1030043 A3 20030212; JP 2000234512 A 20000829; JP 3674358 B2 20050720

INPADOC legal status


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