| 摘要 |
PURPOSE: To prevent obstacles from occurring even when a trouble generated such as not to be able to use a turbine sensor by using an output signal out of signals switchedly outputted from an input revolution sensor, a computing means, and an estimating means. CONSTITUTION: An input signal processing portion 65 of AT controller 7 counts pulses from a turbine sensor 16 as an input revolution sensor and outputs a turbine revolution Nt. A gear ratio (r) GP is calculated at a block 68 from the turbine revolution Nt and a car speed signal VSP, so that a resultant signal is outputted to a line pressure controlling portion 69. Then, on the occasion of disorder of the turbine sensor 16, input circuit, and input processing portion, that is, when a slipping ratio of a torque converter is abnormal relative to throttle valve opening TVO and engine revolution Nt then changes a changing portion 71 to a trouble time side by a trouble diagnosis portion 72, sends out the turbine revolution Nt and the gear ratio(r) GP calculated without using the turbine sensor 16 to respective controlling portions. |
