Transmissions engaged gear ratio determining process for e.g. car, involves comparing result of division of engine speed values found before and after ratio change to preset values to find engaged ratio, where change is detected by sensor

摘要

The process involves dividing an engine speed value measured before changing a transmission ratio by an engine speed value measured after changing the ratio. The division result is compared with stored predetermined values which depend on a transmission (8) to determine an engaged transmission ratio. The change of the ratio is detected by a sensor placed on a clutch (10) through which the transmission is coupled to an engine (6).