Manual Transmissions (MT) and Automated Manual Transmissions (AMT)
Since they are very common from the basic principle point of view, you find basic information on both transmission types on this page.
Overview for MT and AMT
Manual Transmissions (MT)
are composed of a single disc clutch and a mechanical gearbox, which realizes the gear ratios via gear wheel pairs. Both the clutch and the gearbox is operated manually by the driver.
Since manual gearboxes do not enable gear shifting under drive torque, the clutch must be opened for the time period of the gearshifts in order to eliminate the load on the gearbox. This results in temporary loss of drive torque during the gearshifts.
Automated Manual Transmissions (AMT)
are the evolution of the MTs and use exactly the same principles. The difference is the way of operation: a manual transmission is actuated via human power, an automated manual transmission via electronically controlled actuators, taking over the tasks of the driver.
An AMT provides enhanced comfort by releasing the driver from the burden of operating the clutch pedal and the gearshift level, but requires some compromise since the torque interruption during gearshift is still present.
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