CONTROL ARRANGEMENT AND METHOD FOR CONTROLLING A VEHICLE DURING DOWNHILL OR UPHILL DRIVING

Patentradars sammanfattning

TRATON AB's invention addresses torque-interruption disturbances in automated manual transmissions (AMTs) during grade driving by proactively advancing scheduled gear shifts before the vehicle reaches its predetermined target speed. When a vehicle is accelerating downhill or decelerating uphill toward a known target speed (from cruise control, speed limiters, autonomous systems, etc.), and the default shift scheme would trigger a gear change at or near that target speed, the control arrangement instead commands the shift earlier—at an 'adjusted gear shift speed' or by a minimum advance time. This prevents the torque interruption from occurring at the moment of highest required propulsive or braking torque, improving comfort, avoiding overshoot of the target speed, reducing service brake wear, and improving energy efficiency. The method constrains the advanced shift to ensure the power unit remains within its permissible rotational speed range and that sufficient torque is available post-shift to meet the ongoing acceleration or deceleration demand.

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