Bosch Corporation

Ud Trucks Corporation

Miwa Hayashi

Takeshi Miyamoto

Fumiyasu Kurogi

Takefumi Mochizuki

Kimiko Seto

An exhaust gas purification device is capable of diffusing and introducing a reducing agent into a NOcatalyst arranged in a downstream side exhaust gas passage. A housing of the device includes a main body in which an upstream side exhaust gas passage and the downstream side exhaust gas passage are housed, and a cap attached to a first surface of the main body provided with an outlet side opening of the upstream side exhaust gas passage and an inlet side opening of the downstream side exhaust gas passage. At least one of the first surface of the main body and a second surface in the cap which faces the first surface includes a guide portion, for guiding an exhaust gas flow, and a reducing agent diffusion portion, for facilitating mixing of the reducing agent with the exhaust gas.

Exhaust gas purification device

The invention provides an exhaust gas purification apparatus for an internal combustion engine which evenly diffuses a reducing agent over an entirety of the exhaust gas which flows into an NOcatalyst disposed on the downstream side of thereof. The exhaust gas purification apparatus includes an NOcatalyst disposed in an exhaust gas passage of an internal combustion engine, and a reducing agent injecting unit for injecting the reducing agent into the exhaust gas passage which is on an upstream side of the NOcatalyst. A narrowed portion, in which a cross-sectional area of a flow passage is smaller than a cross-sectional area of the exhaust gas passage and of the NOcatalyst, is provided on a downstream side of an injecting position by the reducing agent injecting unit and the upstream side of the NOcatalyst, and a reducing agent diffusing device is provided on the narrowed portion.

Exhaust gas purification apparatus for internal combustion engine

An exhaust gas purification device for an internal combustion engine that has a turn-back portion in an exhaust gas passageway which makes the device compact and causes a reducing agent to be evenly dispersed and flow into a reduction catalyst disposed in an exhaust gas passageway downstream of the turn-back portion. The device has a lid portion that is attached to a side surface of the body portion and the body portion has an outlet opening for the upstream-side exhaust gas passageway and an inlet opening for the downstream-side exhaust gas passageway, and the turn-back portion comprises a space enclosed by the body portion and the lid portion, and a guide portion for directing the flow direction of exhaust gas with which the reducing agent has become mixed toward the is downstream-side exhaust gas passageway is integrally molded in an opposing surface of the lid portion that opposes the inlet opening of the downstream-side exhaust gas passageway.

Growing community of inventors

Saitama, Japan

Miwa Hayashi