Double air-fuel ratio sensor system having improved response characteristics
CA 1249358 A · Owner: Toyota Jidosha Kabushiki Kaisha · Inventors: Masui, Takatoshi; Satou, Yasushi; Nagai, Toshinari
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a double air-fuel sensor system including two air-fuel ratio sensors upstream and downstream of a catalyst converter provided in an exhaust gas passage the actual air-fuel ratio is adjusted in accordance with the output of the upstream-side and downstream-side air-fuel ratio sensors. For a predetermined time period after the engine enters an air-fuel ratio feedback control for the downstream- side air-fuel ratio sensor the control speed by the downstream-side air-fuel ratio sensor is increased.
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
- Granted January 24, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 24, 2006.
- 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.