Isuzu Motors Limited

Masahiro Kajiyama

Takao Onodera

Naoto Murasawa

Hitoshi Satou

Tetsuya Murata

Hiroyuki Ishikawa

Takayuki Mukunashi

Kenzou Yaginuma

Kazuhiro Mori

Akio Nishikata

Hiroshi Kubo

Provided are an exhaust purification device and an exhaust purification method which can achieve improved fuel efficiency. The exhaust purification device () is equipped with: a DOC () for occluding hydrocarbons in an exhaust gas; a DPF () that is provided downstream from the DOC () and is for trapping particulate matter in the exhaust gas; and an ECU () for determining, in accordance with the amount of occluded hydrocarbons in the DOC (), a start time for a regeneration process for removing particulate matter accumulated in the DPF ().

Exhaust purification device and exhaust purification method

An exhaust gas purification device includes an exhaust gas after-treatment device provided in an exhaust passage of an internal combustion engine, and has an oxidation catalyst and a DPF or diesel particulate filter. The exhaust gas purification device also includes an exhaust pipe injector which feeds a fuel to the oxidation catalyst, and a control unit which controls regeneration of the filter by supplying the oxidation catalyst with the fuel from the exhaust pipe injector. The control unit determines whether the filter is in a regeneration-possible state, i.e., whether the oxidation catalyst is maintained at a high temperature allowing regeneration of the filter. If the control unit determines during regeneration control of the filter that the filter is not in the regeneration-possible state, then the control unit halts the regeneration control until the regeneration-possible state is reached.

Exhaust gas purification device of internal combustion engine

An engine stop control device which is capable of stopping an engine without imparting an unpleasant sensation to the driver is provided. The device includes a fuel injection device for supplying fuel, an intake air amount adjustment device for adjusting an amount of intake air, an accessory controller for controlling operation of an accessory, a fuel injection controller for controlling a fuel injection amount from the fuel injection device, and an engine stop switch. When the engine stop switch is operated, driving of the accessory is stopped by the accessory controller, and the intake air is throttled by the intake air amount adjustment device, and further, when the engine rotational speed rises due to stoppage of the accessory, the engine is stopped while the fuel injection amount of the fuel injection device is controlled by the fuel injection controller such that the engine runs at a predetermined rotational speed.

Engine stop control device

Growing community of inventors

Fujisawa, Japan

Masahiro Kajiyama