EXHAUST-EMISSION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE

Japanese Patent JP2005016393

A

To maintain capacity for oxidation of an EGR catalyst by oxidatively removing PM deposited on the EGR catalyst, and prevent melting loss of the EGR catalyst in an exhaust-emission control system of an internal combustion engine provided with an EGR system having the EGR catalyst.

The exhaust-emission control system is provided with an exhaust-emission control means for trapping particulates contained in exhaust gas, an EGR passage, an EGR cooler, the EGR catalyst, and an EGR valve. In the combustion cycle of the internal combustion engine, a secondary injection of an additional fuel-injection is carried out at a specified timing after a primary injection in order to oxidatively remove particulates trapped by the exhaust-emission control means, and at the same time exhaust gas is allowed to flow to the EGR catalyst through the EGR passage by opening the EGR valve (S107-S112) in a specified period during the secondary injection is being carried out.

KAMOSHITA SHINJI
SHOJI AKIRA
YABE MASAHIKO
SUZUKI NAOTO
KOYANAGI YOSHITAKE

JP2003181533A

January 20, 2005

June 25, 2003

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TOYOTA MOTOR CORP
HINO MOTORS LTD

F02M25/07; B01D46/42; B01D53/94; F01N3/02; F01N3/08; F01N3/18; F01N3/24; F01N3/36; F02D21/08; F02D41/04; F02D41/38; F02D43/00; (IPC1-7): F02D21/08; B01D53/94; F01N3/02; F01N3/08; F01N3/18; F01N3/24; F01N3/36; F02D41/04; F02D41/38; F02D43/00; F02M25/07

Yoshiyuki Kawaguchi
Hidemi Matsukura
Yutaka Nagata
Kazunobu Sera
Tsutomu Toyama

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