Electronic controller for an automatic transmission

Details Electronic controller for an automatic transmission Electronic controller for an automatic transmission

F - Mech Eng,Light,Heat,Weapons

16

H

74/137, 341/68

F16H 61/02 (2006.01) F16H 61/12 (2010.01)

Patent

CA 1314155

ABSTRACT OF THE DISCLOSURE An electronic controller, for use in an automatic transmission control system, for controlling solenoid- actuated valves to control the flow of hydraulic fluid throughout the transmission thereby allowing gears and friction elements to cooperate in response to various input signals, allowing the entire system to be adaptive to changing load demands placed on the vehicle. Substantially all shifts are made using closed-loop control (i.e., control based on feedback). In particular, the control is closed loop on speed, speed ratio, or slip speed of either Nt (turbine of the torque converter) and Ne (engine) or a combination of Nt and No (output) which will provide the speed ratio or slip speed. This transmission control is also capable of "learning" from past experience and making appropriate adjustments on that basis.

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