A vehicle transmission control system

摘要

A vehicle transmission control system in which a central control unit (36) issues signals to an associated main drive clutch actuator (22,38) and to ratio actuating means (25) to effect changes in the operative ratio of an associated transmission (12) in accordance with a predetermined shift point map. When the shift point map indicates that the ratio shift is appropriate, the system tests for fluctuations in the position of an associated engine accelerator pedal (19) and only actions the shift if the degree of fluctuation of the accelerator pedal position is judged acceptable. The acceptable level of accelerator pedal fluctuation preferably varies with engine speed.