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Is a 9-speed manual-automatic transmission an AT transmission?

1 Answers

DiChristian

07/28/25 9:16am

A manual-automatic transmission is not an AT; an AT is an automatic transmission. A manual-automatic transmission, also known as a semi-automatic transmission, combines manual and automatic transmission functions. It is based on an automatic transmission but allows the driver to manually increase or decrease gears. Below is an introduction to manual-automatic transmissions. Overview: A manual-automatic transmission is a gear-shifting device that integrates both manual and automatic transmission functions. This technology aims to enhance the fuel efficiency and controllability of automatic transmissions by returning the shift timing, which is typically determined by the computer, to the driver's control. This improves driving operability and enriches the driving experience. Working Principle: Structurally, a manual-automatic transmission mainly consists of a conventional gearbox (similar to a manual transmission), an electronically controlled clutch, an automatic shift mechanism, and an electronic control unit. The electronically controlled clutch automatically engages, disengages, or partially engages the clutch as needed. During operation, the transmission ECU controls a stepper motor to move the clutch fork, thereby engaging or disengaging the clutch. The automatic shift mechanism automatically selects the appropriate gear as required, typically using two stepper motors, both controlled by the transmission ECU. The gear lever setup is similar to that of a conventional automatic transmission, with no clutch pedal.

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