| 摘要 |
<p>PURPOSE:To calculate and estimate the input shaft torque and the gear ratio at high precision, so as to using any turbine sensor and any torque sensor in the automatic transmission. CONSTITUTION:Whether an automatic transmission is in the non-speed changing state or in the speed changing state is judged by a speed changing state detecting unit 62. When the automatic transmission is in the speed changing state, the gear ratio and the input shaft torque, including the correction amount of the inertia of an engine torque and an engine power train and the accessory torque, are calculated and estimated by an engine characteristic estimating unit 61. In this time, the deviation between the pump torque in no speed changing just before the speed change is started and the engine torque just after the speed change is started is learned as auxiliary machine torque, and the value is given as the auxiliary machine torque in changing of speed, so as to calculate and estimate the input shaft torque. Thereby the input shaft torque in changing of speed, so as to calculate and estimate the input shaft torque. Thereby the input shaft toque and the gear ratio can be calculated and estimated at high precision without using any turbine sensor and any torque sensor in the automatic transmission, and they can be controlled.</p> |
