Transmission control system
CA 1096473 A · Owner: Borg-Warner Corporation · Inventors: Miller, Alan L.; Petzold, Werner P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control system changes the gear ratio in an automatic transmission when engine torque is transferred from one member to another member of a three member planetary gear set. This transfer is accomplished through friction elements engaged and released by hydraulic pressure without the use, of one-way clutches. A closed loop electrical circuit is completed between a transducer, which provides an electrical signal related to the output torque of the transmission and, a pair of control valves, to vary the pressure applied by each control valve. A circuit for computing reaction torque is coupled between the transducer and a logic control circuit, which provides logic command signals for …
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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
- Granted February 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 24, 1998.
- 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.