Power shifter control system

摘要

A power shifter control system for controlling the operation of a power shifter (2), which receives a shifting action from a change lever (1) via a shift cable (5) in either direction and provides the shifting action with its force amplified by a motor (3) of the power shifter (2) to a transmission, said power shifter-control system comprising a shift position sensor (10) for detecting a shift position of said power shifter (2), a select sensor (13) for detecting a select position selected by a select lever (15), a transmission rotational rate detector (12) for detecting a rotational rate of said transmission, an engine rotational rate detector (14) for detecting an engine rotational rate, and a controller (4) for controlling the driving of said motor (3) according to output signals provided from said shift position sensor (10), said select sensor (13), said transmission rotational rate detector (12) and said engine rotational rate detector (14), wherein the controller (4) includes a possible down-shifting speed change stage number range calculator (45) for calculating a possible down-shifting speed change stage number range in a permissible rotational rate of the engine according to said transmission rotational rate, said engine rotational rate and output signals of said shift position sensor (10) and select sensor (13) representing the shifted speed change stage, and a shift operation controller (46) for providing a shift operating force in the direction opposite to the shifting direction to said motor (3) via a motor drive portion (47) thereof when the shifted speed change stage detected by said shift position sensor (10) and said select sensor (13) is not in a possible down-shifting speed change stage number range but in another speed change stage.