Variable compression ratio internal combustion engine
CA 2066196 A1 · Owner: Siemens-Bendix Automotive Electronics L.P. · Inventors: Daly, Paul D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A variable compression ratio internal combustion engine having at least one cylinder, a piston disposed in the cylinder and a cylinder head disposed at one end of the cylinder. The cylinder head has a combustion chamber and a piston chamber contiguous with the top of the cylinder. A movable piston disposed in the piston chamber to change the effective volume of the combustion chamber. A closed end of the piston chamber is connected to one of the engine's sources of pressurized fluid. A solenoid valve is disposed between the source of pressurized fluid and the piston chamber. Energization of the solenoid valve is controlled by a controller to open the solenoid valve when the combustion …
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 18, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 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.