Exhaust gas purifying apparatus for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsToshihiro Mori, Yuki Bisaiji
Life of this patent
Estimating the term…
Abstract
An exhaust gas purifying apparatus for an internal combustion engine is provided with: a first catalyst (234) which is disposed in an exhaust passage of the internal combustion engine (200); a second catalyst (235) which is disposed in the exhaust passage on a downstream side of the first catalyst; a reducing agent supplying device (233) which is disposed on an upstream side of the first catalyst and which is configured to supply a reducing agent into the exhaust passage; and a reducing agent supply controlling device (100) which is configured to control the reducing agent supplying device such that an air-fuel ratio on the upstream side of the first catalyst becomes momentarily rich.
Claims13
An exhaust gas purifying apparatus for an internal combustion engine, comprising:
- a first catalyst which is disposed in an exhaust passage of the internal combustion engine;
- a second catalyst which is disposed in the exhaust passage on a downstream side of the first catalyst;
- a reducing agent supplying device which is disposed on an upstream side of the first catalyst and which is configured to supply a reducing agent into the exhaust passage;
- and
- a reducing agent supply controlling device which is configured to control the reducing agent supplying device such that an air-fuel ratio on the upstream side of the first catalyst becomes momentarily rich.
Dependencies are inferred from the claim text.