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Resistance adjusting type heater and catalytic converter
| Details |
Inventors: Mizuno, Hiroshige; Abe, Fumio; Harada, Takashi;
Assignee: NGk Insulators, Ltd. (JP)
Primary Examiner: Warden; Robert J.
Assistant Examiner: Blythe; Stephanie
Attorney, Agent or Firm: Parkhurst, Wendel & Rossi
A resistance adjusting type heater including a honeycomb structure having a large number of passages, at last two electrodes for energizing the honeycomb structure, and a resistance adjusting mechanism such as a slit provided between the electrodes to heat the gas flowing through the passages formed in the honeycomb structure. A catalytic converter includes a main monolith catalyst and the above-described heater placed adjacent to and upstream of the main monolith catalyst. A catalytic converter includes a honeycomb structure having a large number of passages, a catalyst carried on the honeycomb structure, at least two electrodes for energizing the honeycomb structure, and a resistance adjusting mechanism provided between the electrode. A catalytic converter includes a main monolith catalyst, and a heater placed adjacent to and upstream of the main monolith catalyst. The heater includes a honeycomb structure having a large number of passages, a catalyst carried on the honeycomb structure, at least two electrodes for energizing the honeycomb structure, and a resistance adjusting mechanism provided between the electrodes. |
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DETAILED DESCRIPTION Accordingly, an object of the present invention is to provide a resistance adjusting type heater and catalytic converter which eliminate the aforementioned problems of the prior techniques.
To achieve the above object, the present invention provides a resistance adjusting type heater which comprises a honeycomb structure having a large number of passages, at least two electrodes for energizing the honeycomb structure, and a resistance adjusting means provided between the electrodes to heat the gas flow through the passages formed in the honeycomb structure.
The present invention further provides a catalytic converter which comprises a main monolith catalyst and the above-described heater placed adjacent to and upstream of the main monolith catalyst.
The present invention further provides a catalytic converter which comprises a honeycomb structure having a large number of passages, a catalyst carried on the honeycomb structure, at least two electrodes for energizing the honeycomb structure, and a resistance adjusting means provided between the electrodes.
The present invention further provides a catalytic converter which comprises a main monolith catalyst, and a heater placed adjacent to and upstream of the main monolith catalyst.
The heater includes a honeycomb structure having a large number of passages, a catalyst carried on the honeycomb structure, at least two electrodes for energizing the honeycomb structure, and a resistance adjusting means provided between the electrodes.
In a preferred form, the honeycomb structure is manufactured by extruding powders into a honeycomb configuration and by sintering the shaped body.
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Metal Working 
