Method and apparatus for gear down operation prevention

摘要

The method involves determining if a numerically lowest gear ratio of a manual transmission is currently selected. A load percentage of the engine is then determined and if the load percentage of the engine is below a predetermined threshold, it requires reducing a road speed limit of the vehicle. If the numerically lowest gear ratio is not currently selected and the requested load percentage is below the threshold, then a road speed of the vehicle is determined. The road speed of the vehicle is reduced if the road speed is above the road speed limit. Additionally it requires determining an engine speed of the engine, and the currently selected gear ratio is calculated from the engine speed and the road speed.