Isuzu Motors Limited

Hino Motors, Ltd.

Isao Ohara

Yuuta Kageyama

Takao Onodera

Junji Sakai

Yuki Ueda

The exhaust structure comprises an exhaust pipe through which exhaust gas flows, a urea water injector that injects urea water, a SCR catalyst provided downstream of the injection position of the urea water, and an attachment member for fixedly attaching the urea water injector to the exhaust pipe. The attachment member is a cylindrical body passing through in the axial direction, and is attached to the exhaust pipe such that a nozzle hole of a urea water injector is disposed in one opening part and the other opening part faces the inside of the exhaust pipe on the upstream side of the SCR catalyst. The inner peripheral surface of the attachment member is provided with a rib that causes exhaust gas flowing from the other opening part to the one opening part to change direction so as to flow from the one opening part to the other opening part.

Exhaust structure and injector attachment member

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

Isao Ohara