Method of operating i.c. engines and apparatus thereof
CA 2046923 C · Owner: Pfefferle, William C. · Inventors: Pfefferle, William C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Operation of unthrottled internal combustion engines is improved by providing the combustion chambers with an electrically heated glow plug (10) having a catalyst surface layer (33) on the ignition element (11). The catalyst (33) is heated to and maintained at a temperature high enough to be effective for vaporization of fuel drops and ignition of vaporized fuel by controlled electrical heating. In operation of the engine air is compressed in a combustion chamber and at least a portion of the fuel is injected during the latter portion of the compression stroke and the injected fuel ignited by contact of fuel with the hot catalytic surface (33) of the glow plug (10) resulting in a …
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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
- Filed February 15, 1990 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2012.
- 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.