| 摘要 |
PURPOSE:To obtain the maximum acceleration within the time required for acceleration by a driver, by determining a transient condition different from the steady state and rapidly changing a speed change speed in one part within said required time in the time of full opening acceleration like a kick down. CONSTITUTION:A control unit 40, reading signals Np, Ns and theta from each sensor 41, 42 and 44, obtains actual speed change ratio (i) in a speed change speed arithmetic part 45, target speed change ratio (is) in a target speed change ratio reference part 46 and a target speed change ratio change speed dis/dt in a target speed change speed arithmetic part 47, and a speed change speed di/dt is obtained in a speed change speed arithmetic part 49 by using those obtained in the above and coefficients k1, k2. Then duty ratio D is referred by using a table to a duty ratio reference part 50 by + or -rdi/di and (i) in a shift up and a shift down. A duty signal is input to a solenoid valve 28 generating a control pressure of pulse state, in this way, a speed change speed control valve 23 is repeatedly actuated in two positions of oil supply and discharge. |
