Controller, control method and control system for controlling a motor vehicle gear-type transmission

A controller for a motor vehicle gear-type transmission adapted to:

• transmit power to the motor vehicle gear-type transmission by adjusting a position or pressure load of a pressure member which applies a pressure to a friction surface of a friction transmission mechanism;
• and
• output a torque from an output shaft of the motor vehicle gear-type transmission to a driving shaft of a motor vehicle;
• wherein the controller comprises control means for changing, by using at least one of parameters each indicating a state of the gear-type transmission or of the vehicle, a position or pressure load at which the pressure member is caused to stand by while the driving shaft is in a stopped state.

A controller for a motor vehicle gear-type transmission adapted to:

• transmit power to the motor vehicle gear-type transmission by adjusting a position or pressure load of a pressure member which applies a pressure to a friction surface of a friction transmission mechanism;
• establish a required change gear position by connecting any one of plural gear pairs each rotating between an input shaft and output shaft which form part of the motor vehicle gear-type transmission, to the input shaft or the output shaft via any one of plural mesh mechanisms;
• and
• output a torque from the output shaft of the motor vehicle gear-type transmission to a driving shaft of a motor vehicle;
• wherein the controller comprises control means for changing, by using at least one of parameters each indicating a state of the gear-type transmission or of the vehicle, a position or pressure load at which the pressure member is caused to stand by during changeover of any one of the mesh mechanisms that connects to any one of the gear-pairs.

A controller for a motor vehicle gear-type transmission which comprising:

• a friction transmission mechanism which transmits power by adjusting a position or pressure load of a pressure member which applies a pressure to a friction surface;
• an input shaft which rotates by receiving the torque transmitted from the friction transmission mechanism;
• an output shaft which outputs torque to a driving shaft of a motor vehicle;
• a plurality of gear pairs each rotating between the input shaft and the output shaft;
• a plurality of mesh mechanisms each establishing a required change gear position by connecting any one of the plural gear pairs to the input shaft or the output shaft;
• and
• an actuator which adjusts the position or pressure load of the pressure member;
• wherein the controller controls a driving electric current of the actuator such that a position or pressure load at which the pressure member is caused to stand by while the driving shaft is in a stopped state or during changeover of any one of the mesh mechanisms that connects to any one of the gear pairs is changed by at least one of parameters each indicating a state of the gear-type transmission or of the vehicle.

A method for controlling a motor vehicle gear-type transmission which comprising:

• a friction transmission mechanism which transmits power by adjusting a position or pressure load of a pressure member which applies a pressure to a friction surface;
• an input shaft which rotates by receiving the torque transmitted from the friction transmission mechanism;
• an output shaft which outputs torque to a driving shaft of a motor vehicle;
• a plurality of gear pairs each rotating between the input shaft and the output shaft;
• a plurality of mesh mechanisms each establishing a required change gear position by connecting any one of the plural gear pairs to the input shaft or the output shaft;
• and
• an actuator which adjusts the position or pressure load of the pressure member;
• wherein the control method comprises changing, by at least one of parameters each indicating a state of the gear-type transmission or of the vehicle, a position or pressure load at which the pressure member is caused to stand by while the driving shaft is in a stopped state or during changeover of any one of the mesh mechanisms that connects to any one of the gear pairs.

A control system for a motor vehicle gear-type transmission, comprising:

• a controller for the motor vehicle gear-type transmission adapted to transmit power to the motor vehicle gear-type transmission by adjusting-a position or pressure load of a pressure member which applies a pressure to a friction surface of a friction transmission mechanism, establish a required change gear-position by connecting any one of plural gear pairs each rotating between an input shaft and output shaft which form part of the motor vehicle gear-type transmission, to the input shaft or the output shaft via any one of plural mesh mechanisms, and output a torque from the output shaft of the motor vehicle gear-type transmission to a driving shaft of a motor vehicle;
• and
• an actuator which adjusts the position or pressure load of the pressure member with a control command from the controller of the motor vehicle gear-type transmission;
• wherein the control system comprises control means for changing, by at least one of parameters each indicating a state of the gear-type transmission or of the vehicle, a position or pressure load at which the pressure member is caused to stand by while the driving shaft is in a stopped state or during changeover of any one of the mesh mechanisms that connects to any one of the gear pairs.