Sumitomo Electric Industries, Limited

Naruhito Nakajima

Kenji Matsunuma

Shiro Nakajima

Particulate trap for a diesel engine

A particulate trap which can be used in a medium- or small-sized diesel engine car includes concentrically arranged cylindrical filters made of a three-dimensionally reticulated metallic porous material and a plate-shaped electric heater for regeneration having an output of 400 W or less, and is provided between the filters and spaced therefrom. The filters have a relatively shortened length. The heating amount of the filters by the heater is 0.60 W/cm.sup.2 or more. The filter has an increased thickness to make up for reduction in the filter surface area due to the shortened filter length. With this arrangement, it is possible to achieve a high regeneration efficiency with a low-output heater while suppressing heat loss.

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Itami, Japan

Naruhito Nakajima