Combined cycle engine
CA 2234083 C · Owner: Gray, Charles L. Jr. · Inventors: Hellman, Karl H.; Gray, Charles L. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of operation of an internal combustion engine to minimize NOx emission in the exhaust gas involving the detection of the load on the vehicle engine as either a low load or a high load. When a low load is detected unthrottled air and a quantity of fuel providing for a lean combustion condition are mixed with the injection (4) of fuel adjacent top dead center during the compression stroke. When a high load condition is detected throttled air and a quantity of fuel governed by the sensed oxygen content of the exhaust gas are mixed in an approximately stoichiometric ratio with the injection (4) at a much earlier time than the injection at low load preferably during the intake …
Read the whole patent
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 September 27, 1996 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2018.
- 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.