Adding actuators to an existing manual transmission to create an AMT results in a system with high mechanical efficiency but with poorly perceived shift quality and shift time in passenger car applications. One potential solution to this is the powershift AMT. This paper describes the operating principles of a powershift AMT and the mechanical and control design issues to be considered during the design of a powershift AMT to suit a "C" class car. As an example, details of a Ricardo concept design for a powershift AMT are included.
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