Mechanical automatic transmission

Details Mechanical automatic transmission Mechanical automatic transmission

B - Operations, Transporting

60

K

74/142, 180/51,

B60K 20/00 (2006.01) B60K 23/00 (2006.01) B60K 31/00 (2006.01) F16H 3/12 (2006.01) F16H 61/10 (2006.01) F16H 59/08 (2006.01) F16H 59/14 (2006.01) F16H 59/18 (2006.01) F16H 59/20 (2006.01) F16H 59/22 (2006.01) F16H 59/48 (2006.01) F16H 61/02 (2006.01) F16H 61/04 (2006.01) F16H 61/21 (2006.01)

Patent

CA 1189593

ABSTRACT The invention relates to an automatic transmission for use in motor vehicles. The automatic transmission comprises a mechanical transmission, gear synchronizer and clutch which have been automated by the addition of electro-mechanical and pneumatic operators and an analog and digital electronic control system. The electronic control system receives operator commands regarding the mode of transmission operation (either automatic or manual) and monitors throttle position, engine speed, transmission countershaft speed, drive shaft (vehicle) speed and rates of change of these speeds. By utilizing this information, the electronic control system selects the optimum transmission gear ratio, effects synchronization of the selected transmission gear elements and controls clutch engagement according to a logic program which represents an empirical compromise between conflicting design criteria and operating parameters such as maximum fuel economy, optimum engine/vehicle speed ratio, minimum nuisance shifts and minimum vehicle noise.

318895

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