Patent ID: 8095283

Claim:
A transmission control apparatus for controlling a transmission having an engine output shaft that transmits an output torque of an engine, a first geared transmission mechanism that transmits power of the engine output shaft to a tire, a second geared transmission mechanism that transmits the power of the engine output shaft to the tire, a first clutch provided in a power transmission path extending from the engine output shaft to the tire through the first geared transmission mechanism to transmit or disconnect power, a second clutch provided in a power transmission path extending from the engine output shaft to the tire through the second geared transmission mechanism to transmit or disconnect power, a first clutch actuator that is actuated by an electric signal to operate the first clutch, and a second clutch actuator that is actuated by an electric signal to operate the second clutch, the transmission control apparatus comprising: a clutch actuator controller that controls the first clutch actuator and the second clutch actuator; and power transmission performance drop detecting means that detects or predicts a drop in power transmission performance of the first clutch actuator or the second clutch actuator, wherein when the power transmission performance drop detecting means detects a drop in power transmission performance of the first clutch even if the clutch actuator controller is giving an instruction of power transmission to the first clutch actuator, power transmission in the power transmission path extending from the engine output shaft to the tire through the first geared transmission mechanism is inhibited, and power transmission in the power transmission path extending from the engine output shaft to the tire through the second geared transmission mechanism is enabled, and when the power transmission performance drop detecting means detects a drop in power transmission performance of the second clutch even if the clutch actuator controller is giving an instruction of power transmission to the second clutch actuator, power transmission in the power transmission path extending from the engine output shaft to the tire through the second geared transmission mechanism is inhibited, and power transmission in the power transmission path extending from the engine output shaft to the tire through the first geared transmission mechanism is enabled.