Method and an apparatus to control the temperature of an engine exhaust gas purifying device
CA 1047337 A · Owner: Nissan Motor Co. Ltd. · Inventors: Miyamori, Yukio; Masaki, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The temperature of an exhaust gas purifying device is maintained within an optimum range by enriching an air-fuel mixture for the engine, retarding the ignition timing of the engine, supplying secondary air into engine exhaust gases fed to the purifying device and producing a spark therein when the temperature of the purifying device is below the minimum of the optimum range and by diluting the air-fuel mixture advancing, the engine ignition timing to a normal value stopping, supply of the secondary air and production of the spark when the temperature of the purifying device is higher than the maximum of the optimum range. -1-
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 30, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.