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A hydraulic control apparatus for a vehicle power transmitting system having a continuously variable transmission having a first and a second shaft, a pair of variable-diameter pulleys provided on the shafts, a belt connecting the pulleys, and two hydraulic actuators for changing diameters of the pu

A hydraulic control apparatus for a vehicle power transmitting system having a continuously variable transmission having a first and a second shaft, a pair of variable-diameter pulleys provided on the shafts, a belt connecting the pulleys, and two hydraulic actuators for changing diameters of the pulleys. The apparatus includes a directional control valve for supplying a fluid from a pressure line to one of the two actuators while discharging the fluid from the other actuator, a first fluid passage connected to the directional control valve, for primarily supplying the fluid from the pressure line to a driving side actuator of the two actuators which is provided on a driving one of the first and second shafts, a second fluid passage connected to the directional control valve, for primarily supplying the fluid from the pressure line to a driven side actuator of the hydraulic actuators, and a flow restrictor for restricting a flow of the fluid through the first fluid passage so that a fluid flow resistance of the first fluid passage is higher than a fluid flow resistance of the second fluid passage.

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A hydraulic control apparatus for a power transmitting system for an automotive vehicle having a continuously variable transmission which has a first and a second shaft, a pair of variable-diameter pulleys provided on the first and second shafts, respectively, a belt connecting the pulleys, and a pa

A hydraulic control apparatus for a power transmitting system for an automotive vehicle having a continuously variable transmission which has a first and a second shaft, a pair of variable-diameter pulleys provided on the first and second shafts, respectively, a belt connecting the pulleys, and a pair of hydraulic actuators for changing effective diameters of the pulleys, the apparatus including a directional control valve for supplying a working fluid from a pressure line to one of said pair of hydraulic actuators while discharging the working fluid from the other hydraulic actuator, for controlling a speed ratio of the transmission, wherein the improvement comprises: a first fluid passage connected to said directional control valve, for primarily supplying said working fluid from said pressure line to a driving side actuator of said pair of hydraulic actuators which is provided on a driving one of said first and second shafts; a second fluid passage connected to said directional control valve, for primarily supplying the working fluid from said pressure line to a driven side actuator of said pair of hydraulic actuators; and flow restrictor means for restricting a flow of the fluid through said first fluid passage so that a fluid flow resistance of said first fluid passage is higher than a fluid flow resistance of said second fluid passage.