EXHAUST GAS PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2012/049751

A1

The purpose of the present invention is to improve the exhaust gas purification rate by accurately controlling the air-fuel ratio even in an internal combustion engine that uses alcohol-containing fuel. This exhaust gas purification device for an internal combustion engine is characterized by being provided with an exhaust gas purification catalyst which is disposed in an exhaust gas passage of the internal combustion engine, an air-fuel ratio sensor which is installed upstream from the exhaust gas purification catalyst and detects the air-fuel ratio of exhaust gas discharged from the internal combustion engine, an air-fuel ratio feedback control means which feedback-controls the air-fuel ratio of the internal combustion engine on the basis of the output of the air-fuel ratio sensor, and a sensor output correction means which corrects the deviation of the output of the air-fuel ratio sensor, the deviation being caused by a component contained in the exhaust gas, the sensor output correction means being configured so as to correct the deviation of the output of the air-fuel ratio sensor using the amount of deviation to the lean side of the output of the air-fuel ratio sensor according to the amount and/or percentage of aldehyde contained in the exhaust gas.

TSUKAGOSHI TAKAHIRO (JP)
MORITA KOUJI (JP)

PCT/JP2010/068035

April 19, 2012

October 14, 2010

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TOYOTA MOTOR CO LTD (JP)
TSUKAGOSHI TAKAHIRO (JP)
MORITA KOUJI (JP)

F02D41/14; F02D19/08

JPH03121231A	1991-05-23
JPH06200807A	1994-07-19
JP2010024925A	2010-02-04
JPS6296743A	1987-05-06
JP2009114992A	2009-05-28
JPH051574A	1993-01-08

See also references of EP 2628929A4

TAKAHASHI, Hideki et al. (JP)
Hideki Takahashi (JP)

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