CIRCUIT DE COMMANDE DE PRISE DIRECTE POUR TRANSMISSION HYDRAULIQUE D'AUTOMOBILE

摘要

In a transmission for an automotive vehicle, a control system is provided for controlling a direct-coupling mechanism for mechanically engaging input and output members of a hydraulic power transmission mechanism of the transmission. The control system includes a first sensor for detecting the value of a first parameter indicative of the engine load, and a control mechanism adapted to compare the value of the first parameter detected by the first sensor with a predetermined reference value for selectively engaging and disengaging the input and output members with and from each other through the direct-coupling mechanism. A second sensor detects the value of a second parameter indicative of the vehicle speed, and a reference value setting device sets the predetermined reference value to a value dependent on the value of the second parameter detected by the second sensor.