High voltage fault discrimination for egr temperature sensor
CA 2424564 A1 · Owner: Zagone, Peter · Inventors: Zagone, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Systems and methods for discriminating between an EGR temperature sensor (51) fault and actual EGR temperatures which produce similar signals includes suppressing high voltage faults for a calibratible period of time after the engine (12) is started. Alternatively, or in addition a sensor fault is not , indicated unless secondary indicators suggest that EGR temperature is sufficiently different from EGR temperature corresponding to the sensor signal. Secondary indicator may include signals provided by various other engine and/or vehicle sensors (22, 24) such as ambient air temperature sensor (46), engine coolant temperature sensor (50) oil temperature sensor (44), or , the like.
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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 August 22, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2023.
- 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.