Toyota Jidosha Kabushiki Kaisha

Ngk Insulators, Inc.

Takeo Kobayashi

Yoshiyuki Kasai

Keita Hashimoto

Masaru Kakinohana

Tsuyoshi Watanabe

Rentaro Mori

Tadato Ito

An electrically heated catalyst device that can uniformly heat a catalyst via comb-shaped electrodes even when current is repeatedly made to flow through the electrodes. The device includes a carrier having a metal catalyst supported thereon, a pair of comb-shaped electrodes each having wire portions, a base layer between each comb-shaped electrode and the carrier, and a fixation layer for fixing each wire portion on the base layer. The fixation layer is rectangular in shape when the outer peripheral surface of the carrier is seen from a direction orthogonal to the central axis of the carrier along the longitudinal direction of the device. A pair of opposite first sides of the fixation layer are parallel with the extending direction of each wire portion on opposite sides thereof, and a pair of second sides coupling opposite ends of the first sides are orthogonal to the extending direction of each wire portion.

Electrically heated catalyst device

To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support, gradually decreasing width portions, at which a width thereof gradually decreases toward electrode centers, are formed at regions where electrodes, are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width is shorter than a length of a center line at a given position. Heat generation and heat dissipation of the catalyst support are balanced overall.

Structural body for supporting a catalyst, and catalytic converter

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Toyota, Japan

Takeo Kobayashi