Isuzu Motors Limited

Hino Motors, Ltd.

Yuuta Kageyama

Isao Ohara

Takao Onodera

Katsushi Osada

Yoshihisa Ueda

Yasuo Okamoto

Koji Sakumoto

A maintenance pipe () used during maintenance of an exhaust purification device equipped with: a set of an oxidation catalyst () and a filter () for purifying exhaust gas from an engine (); an upstream connecting pipe (A) and a downstream connecting pipe (B) which are mounted in a demountable way and guide the exhaust gas from the engine () to the oxidation catalyst (); and an exhaust pipe injection device () and injectors () for increasing a concentration of unburned fuel contained in the exhaust gas. The maintenance pipe includes a flanged steel pipe () mounted to be replaceable with the downstream connecting pipe (B), and a maintenance catalyst () that is housed in the flanged steel pipe (), generates heat caused by oxidizing the unburned fuel contained in the exhaust gas from the engine (), and heats the exhaust to discharge the exhaust to an exhaust downstream side.

Maintenance tool and maintenance method for exhaust purification device

A method and a selective-reduction catalyst system to remove foreign matter which may cause closure of a urea water path of a supply module and therearound. A urea water pressure is changed in the urea water path to remove the foreign matter.

Method for removing foreign matter from a selective reduction catalyst system

An exhaust gas purification catalyst, using a reducing agent, is provided on an inside of an exhaust pipe via a support member. A baffle portion for preventing the reducing agent from penetrating the exhaust gas purification catalyst is provided on a portion of an internal surface of the exhaust pipe, which is upstream of the exhaust gas purification catalyst.

Exhaust pipe

An exhaust gas purification device with a first exhaust pipe section for leading exhaust gas discharged from an engine, a second exhaust pipe section having in a side section on an upstream side thereof an opening section for introducing exhaust gas from the first exhaust pipe section, the second exhaust pipe section being connected at a side section thereof to the first exhaust pipe section so that flow of exhaust gas therein becomes a swirl flow and having provided on a downstream side thereof a post-processing device, and a reduction agent supply device provided at an upstream end of the second exhaust pipe section. The opening section is formed so as to include at least a first tilted side extending in a direction tilted relative to an axis of the second exhaust pipe section.

Growing community of inventors

Fujisawa, Japan

Yuuta Kageyama