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A method and an apparatus control a car equipped with an automatic transmission having a lockup clutch. When the lockup clutch is in the lockup state, a variation of a generated torque is detected. When the range of the torque variation detected exceeds a predetermined value, an engine torque is red

A method and an apparatus control a car equipped with an automatic transmission having a lockup clutch. When the lockup clutch is in the lockup state, a variation of a generated torque is detected. When the range of the torque variation detected exceeds a predetermined value, an engine torque is reduced by controlling the engine, and the automatic transmission is controlled to compensate for a reduction of the driving torque due to a reduction of the engine torque. Thus, the speed change ratio is changed to the low gear side. The control unit includes a unit for controlling an output torque of an engine according to a command value, a unit for changing the transmission ratio of the automatic transmission, a unit for detecting a variation of the engine torque, a unit for deciding a target driving torque, a unit for reducing a torque command value when the range of a detected variation of the torque has exceeded a predetermined value when the lockup clutch was in the lockup state, and a unit for deciding a transmission ratio at which the reduction of the driving torque due to the reduction of the engine torque is compensated for.

대표청구항 ▼

A method and an apparatus control a car equipped with an automatic transmission having a lockup clutch. When the lockup clutch is in the lockup state, a variation of a generated torque is detected. When the range of the torque variation detected exceeds a predetermined value, an engine torque is red

A method and an apparatus control a car equipped with an automatic transmission having a lockup clutch. When the lockup clutch is in the lockup state, a variation of a generated torque is detected. When the range of the torque variation detected exceeds a predetermined value, an engine torque is reduced by controlling the engine, and the automatic transmission is controlled to compensate for a reduction of the driving torque due to a reduction of the engine torque. Thus, the speed change ratio is changed to the low gear side. The control unit includes a unit for controlling an output torque of an engine according to a command value, a unit for changing the transmission ratio of the automatic transmission, a unit for detecting a variation of the engine torque, a unit for deciding a target driving torque, a unit for reducing a torque command value when the range of a detected variation of the torque has exceeded a predetermined value when the lockup clutch was in the lockup state, and a unit for deciding a transmission ratio at which the reduction of the driving torque due to the reduction of the engine torque is compensated for. 1. A toroidal continuously variable transmission comprising: an input shaft rotatable by a drive source and moveable along an axis of the input shaft with respect to a case of the transmission; a first cavity including a first input disk movable in a first direction along an axial direction of the input shaft and rotatable together with the input shaft and a first output disk opposed to the first input disk in the axial direction of the input shaft; a second cavity including a second input disk movable in a second direction along the axial direction of the input shaft and rotatable together with the input shaft and a second output disk opposed to the second input disk in the axial direction of the input shaft; a hydraulic loading mechanism including first and second hydraulic chambers arranged in the axial direction of the input shaft, the first hydraulic chamber being at least partially defined by a back surface of the first input disk movable in the first direction and a first disk member movable in the second direction together with the input shaft, the second hydraulic chamber being at least partially defined by a second disk member movable in the first direction together with the first input disk, and a first cylinder movable in the second direction together with the input shaft, and wherein the hydraulic loading mechanism is adapted to press the first and second input disks toward the first and second output disks, respectively, so that the input and output disks of the first cavity approach each other and the input and output disks of the second cavity approach each other when pressurized oil is fed into the hydraulic chambers; and an interlocking portion adapted to shift the second input disk toward the second output disk as the first input disk is shifted toward the first output disk by the hydraulic loading mechanism. 2. A toroidal continuously variable transmission according to claim 1, wherein said hydraulic loading mechanism includes a second cylinder at least partially defining the first hydraulic chamber, the first disk member located inside the second cylinder, the second disk member opposed to the first disk member in the axial direction of the input shaft and defining the second hydraulic chamber, an air chamber defined between the first and second disk members, and a communication hole connecting the inside of the air chamber and the outside of the hydraulic loading mechanism.3. A toroidal continuously variable transmission according to claim 1, wherein said interlocking portion includes the input shaft, a first support portion provided on the back surface of the first input disk so as to be situated at one end portion of the input shaft, and a second support portion provided on a back-surface of the second input disk so as to be situated at the other end portion of the input shaft.4. A toroidal continuously variable transmission according to claim 1, wherein said hydraulic loading mechanism includes the first cylinder mounted on the input shaft, a second cylinder fitted in an inner peripheral surface of the first cylinder and movable in the axial direction of the input shaft, the first disk member located inside the second cylinder and defining the first hydraulic chamber in conjunction with the back surface of the first input disk, and the second disk member provided in the second cylinder and defining the second hydraulic chamber in conjunction with an inner end face of the first cylinder.5. The toroidal continuously variable transmission of claim 1, wherein the interlocking portion is adapted to shift the second input disk in a direction opposite to the direction that the first input disk is shifted by the hydraulic loading mechanism.6. The toroidal continuously variable transmission of claim 1, wherein the first input disk is engaged with the input shaft by a spline portion.