Calculation of Mechanical Transmission Ratios Considering Vehicle Deceleration During the Gear Shift

Power interruption during a mechanical transmission gear-shift causes vehicle deceleration. This effect limits the ratio-step choice.

Pictures show the calculations' results (bus, 38-ton train). Using them, we can find a rule, when to skip gears during acceleration, and objectively judge the usefulness of close steps between low gears. (The designs of two world's greatest transmission makers differ in this point.)

This method can help to improve the optimal shift-indicators and, let us hope, facilitate the development of mechanical transmission shift automation