Toyota Jidosha Kabushiki Kaisha

Hino Motors, Ltd.

Masahiko Yabe

Shinya Sato

Shunsuke Toshioka

Tomihisa Oda

Satoshi Watanabe

Takaharu Shimizu

Yutaka Tanai

Haruyuki Yokota

Hiroyuki Ninomiya

Takahiko Hayashi

Hidemasa Yamazumi

Kensuke Takubo

An exhaust emission control device including a selective reduction catalyst; urea water as reducing agent being added in the pipe upstream of the reduction catalyst depurate NOthrough reduction; an oxidation catalyst arranged in the pipe upstream of an added position of the urea water, the oxidation catalyst physically adsorbing NOin the exhaust gas at a temperature lower than a lower active limit temperature of the reduction catalyst and discharging the adsorbed NOat a temperature higher than a lower active limit temperature of the oxidation catalyst; and a fuel injection device for adding fuel into the exhaust gas upstream of the oxidation catalyst is disclosed. The start of the fuel addition by the fuel injection device is refrained until exhaust temperature on an inlet side of the reduction catalyst is increased to a preset temperature comparable with the lower active limit temperature of the oxidation catalyst.

Exhaust emission control device

Growing community of inventors

Hino, Japan

Masahiko Yabe