Mazda Motor Corporation

Kota Matsue

Masayuki Tetsuno

Yoshiaki Murakami

Yoshikazu Nishimura

Masanobu Kanno

Takayuki Yamaguchi

Noritaka Sakiyama

Yoshiaki Tomita

Daishi Ikeda

Chikara Ishihara

Hiroshi Hayashibara

Yukiichirou Shimada

Ken Ueki

Kazunori Hirasawa

Kaoru Yamada

Makoto Ikegami

Shinya Matsumoto

Masamitsu Tanaka

Takashi Tanaka

Noriyoshi Sahashi

An exhaust emission control system of an engine is provided, which includes a NOcatalyst disposed in an exhaust passage for storing NOwithin exhaust gas when an air-fuel ratio of the exhaust gas is lean, and reducing the stored NOwhen the air-fuel ratio is approximately stoichiometric or rich. A processor executes a NOreduction controlling module for performing, when the NOstored amount exceeds a given amount, a NOreduction control in which a fuel injector performs a post injection of fuel to continuously control the air-fuel ratio to a target ratio so that the stored NOis reduced to be below a given amount, the target air-fuel ratio being a ratio at which the stored NOis reducible, the post injection causing the injected fuel to combust inside a cylinder, the execution of the control permitted when an engine load is within a medium load range.

Exhaust emission control system of engine

An exhaust-gas purification device disposition structure of a vehicle, comprises a fuel tank with a fuel supply port which is disposed so as to be open to an outside of a vehicle compartment, and a urea tank to accommodate urea water solution as deoxidizer to purify exhaust gas. The urea tank is disposed outside the vehicle compartment, and a pouring port of the urea tank is provided inside the vehicle compartment. Accordingly, the urea water solution can be surely prevented from entering into the vehicle compartment even in case of the breakage of the urea tank, and the mistake of supplying the wrong liquid into the wrong supply (pouring) port tank which may be made by confusing the ports can be avoided.

Exhaust-gas purification device disposition structure of vehicle

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Higashihiroshima, Japan

Kota Matsue