Exhaust gas recirculation methods and apparatus for reducing nox emissions from internal combustion engines
CA 2406267 C · Owner: Westport Research Inc. · Inventors: Dunn, Mark E.; Hill, Philip G.; Munshi, Sandeep
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method of operating an internal combustion engine using exhaust gas recirculation (EGR) in combination with directly injected gaseous fuels that are burned within the engine in a stratified combustion mode. An engine with EGR is used is disclosed that includes an injector adapted to provide a high pressure quantity of fuel into a combustion chamber within a given pressure range at a given angle and through a nozzle hole size to help provide for EGR tolerance and consequently, reduce emissions.
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 October 2, 2002 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2024.
- 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.