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Optimized Shift Schedule Controlled by Dynamic 3-Parameter

Ge Anlin & Others  
So far, the shift schedule of typical Automatic transmission is controlled by 2-parameter, i.e. the throttle position a and automobile speed v. This paper proposes a dynamic 3-parameter-controlled shift schedule by introducing a third parameter——the vehical acceleration dv/dt. Both graphical and analytical methods for calculating the 3-parameter shift schedule are presented. A Concept of variable throttle shift is advanced to ensure the same acceleration before and after shifting. Test results have verified the validity and effectiveness of the proposed schedule.
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