PULLEY SIDE PRESSURE CONTROL DEVICE OF CONTINUOUSLY VARIABLE TRANSMISSION IN IDLE OPERATION STOPPING VEHICLE

摘要

PROBLEM TO BE SOLVED: To eliminate a malfunction such as deteriorating durability and deteriorating fuel consumption by a friction loss when pulley side pressure becomes excessive by misjudging that output torque of an engine is large since intake negative pressure is small at the beginning of starting the engine when performing control at departure time from an engine stopping state by an ordinary method for deciding the pulley side pressure on the basis of belt transmission torque TQBLTNORM corresponding to the output torque of the engine determined from an engine speed and the intake negative pressure in a device for controlling the pulley side pressure of a belt type continuously variable transmission mechanism arranged in series to a departure clutch in a transmission of an idle operation stopping vehicle. SOLUTION: At departing time from an idle stopping state, belt transmission torque TQBLTSC corresponding to transmission torque TOSCX of a departure clutch determined from engaging force of the departure clutch is compared with belt transmission torque TQBLTNORM corresponding to engine output to control pulley side pressure PDR, PDN of respective pulleys on the basis of transmission torque TQDR of a drive pulley corresponding to smaller belt transmission torque and transmission torque TQDN of a driven pulley.