BMW launches ‘automatic’ transmission for motorcycles; see how it works | Estadão Mobility | Above 600 cylinders, Market, MotoMotor

BMW introduced a new “automatic” transmission for its motorcycles. Called Automated Shift Assistant, in Portuguese, the system eliminates the need for a clutch lever. The clutch is now activated automatically, eliminating the need for a manual lever to activate the clutch. Gear changes can also be done automatically or “manually”, using the gearshift pedal.

Although it is mechanically similar to the traditional gearbox, the clutch activation and gear changes are carried out by electromechanical actuators. According to BMW, the solution makes driving simpler and more comfortable. For the brand, the automation of the clutch and gear changes does not sacrifice the exciting dynamics of the changes.

The manufacturer, however, did not make it clear which motorcycle model will use the new gearbox. BMW only states that the gearbox creates an even more direct connection with the boxer engine. In other words, the technology must first equip the R line models, such as the R 1300 GS or the R 1250 RT, both on sale in Brazil.

How does the automatic transmission on BMW motorcycles work?

According to BMW, the Automated Shift Assistant is the logical and technical evolution of the Shift Assistant Pro, a type of quickshift from the brand that allows you to shift up or down without activating the clutch lever. However, the system has a lever to engage first gear, or if the pilot prefers to activate the clutch manually.

Electronically controlled electromechanical actuators activate the clutch and perform gear changes

In the case of the new system, there are two electronically controlled electromechanical actuators that operate the clutch and gearbox. When pressing the gearshift pedal with your foot, to engage first gear, for example, a sensor sends the request to the control unit. Additional sensors determine transmission input shaft rotations and clutch position. This information goes to an exchange control unit. In conjunction with the engine ECU, it controls the clutch, actuation and gear changes.

The clutch is activated by an electromechanical actuator. The actuator regulates the required slippage of the clutch and determines the time to engage and disengage when changing gears.

In manual shift mode “M”, the driver can change gears using the gearshift pedal in the usual way. If the rpm in the desired gear is within the maximum or minimum rpm range, the shift takes place. If engine speeds fall below a minimum depending on the gear, downshifts also take place automatically in manual mode. Everything to prevent the engine from stopping and the bike from “dying”.

On the other hand, in shift mode “D”, gear changes are made automatically, depending on the riding mode, engine speed, throttle position and lean angle parameters. Changes take place according to the riding situation and dynamic requirements. The pilot chooses modes from a button on the left grip.

Benefits of Automatic Shift Assistant, according to BMW

BMW launched its automatic (or automated) transmission for motorcycles under the motto of “simplify your ride”. According to the brand’s statement, driving with the Automated Shift Assistant also becomes more enjoyable thanks to the quick changes adapted to the speed and load. According to the German manufacturer, the benefits of the technology are:

Motorcycles with the system will not have a clutch lever

Completely eliminates the need for the rider to operate the clutch.

Dynamic and comfortable gear changes for greater riding pleasure.

Option of manual or automatic gear shifting.

Automatically adapts gear changes to the rider’s dynamic preferences in automated D mode.

Eliminates the possibility of engine stalling due to unfavorable gear changes.

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https://mobilidade.estadao.com.br/inovacao/bmw-lanca-cambio-automatico-para-motos-veja-como-funciona/
Author: Arthur Caldeira

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