BMW Motorrad has unveiled an innovative feature aimed at enhancing long-distance riding comfort: the Automated Shift Assistant (ASA) for its motorcycles. This cutting-edge system eliminates the need for the conventional clutch lever by employing two electromechanical actuators to automate both clutch engagement and gear shifting actions.
In the D mode, the ASA system seamlessly manages both clutch and gear shift actions, providing riders with a smooth and effortless riding experience. Additionally, riders have the option for manual intervention through the M mode, allowing them to control gear changes using conventional foot control. However, the system automatically downshifts if the rider fails to select the appropriate gear for the engine rpm, ensuring optimal performance and safety.
The ASA system is meticulously tuned to complement the boxer engine, delivering seamless shifting across various riding conditions. Upshifts are executed with minimal jolts, eliminating the characteristic head nod associated with manual transmissions. Even during downshifts, the system minimizes chassis disturbances, maintaining stability even under load conditions.
Moreover, the Automated Shift Assistant is integrated across the engine’s riding modes to cater to diverse riding conditions. It seamlessly coordinates with features such as adaptive cruise control and forward collision warning, managing both upshifts and downshifts without requiring rider intervention. Consequently, the ASA system reduces rider fatigue and enhances concentration during prolonged rides.
From a mechanical standpoint, the clutch is operated by an electromechanical actuator connected via a hydraulic link between the clutch master and slave cylinders. This actuator precisely manages clutch slippage, engagement, and disengagement based on riding conditions.
Similarly, the transmission is controlled by another electromechanical actuator, which operates based on input from the transmission input shaft revs and clutch position. This data is transmitted to the transmission control unit, closely integrated with the engine control unit. Meanwhile, rider shift requests are conveyed through the conventional foot gear selector, ensuring intuitive control and seamless integration with the ASA system.
