Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Seiji Kikuchi

Kinichi Iwachido

Kazuhito Kawashima

Keisuke Tashiro

Masahiro Tsuda

Hiroaki Ohhara

Takehisa Fujita

Yoshio Tagawa

Mizuki Anai

Jian Wang

Hiroshi Anoda

An exhaust purification system includes a catalyst disposed in an exhaust path of an internal combustion engine; a fuel pump that supplies fuel to a common rail; an exhaust-side fuel injection valve that is interposed in the exhaust path so as to be located upstream of the catalyst and injects into the exhaust path the fuel supplied from the fuel pump; and estimation section that estimates a clogging degree of an injection port of the exhaust-side fuel injection valve on the basis of fluctuations in pressure of the common rail and those in revolution speed of the internal combustion engine at the time of fuel injection by the exhaust-side fuel injection valve.

Exhaust purification system for internal combustion engine

There is provided an exhaust emission purifying catalyst device which is comprised of a carrier disposed in an exhaust passage and including through holes passed through the carrier in an axial direction (flowing direction), and supporting layers made of fire-resistance inorganic oxide formed on inner surfaces of the through holes. The supporting layers support noble metal and NOtrapping agents which occlude NOin exhaust gas when the exhaust air-fuel ratio is lean, and emits and reduces the occluded NOwhen the exhaust air-fuel ratio is stoichiometric or rich. The amount of the supported noble metal is set to be smaller in an exhaust passage upstream area of the carrier than in an exhaust passage downstream area of the carrier.

Exhaust emission purifying catalyst device

Growing community of inventors

Okazaki, Japan

Seiji Kikuchi