| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce occurrence of a shift shock, in a step type automatic transmission mechanism for an automobile. SOLUTION: This device comprises an input torque computing part 131 to determine input torque Tt of a step type automatic transmission mechanism from the number Ne of revolutions of an engine and the number Nt of revolutions of a turbine, a shift starting recognizing part 134 to recognize the actual mechanical shift starting timing of the step type automatic transmission mechanism according to a change of the input torque Tt, a line pressure correction amount calculating part 142 to calculate a line pressure correction amountΔPL in the middle of shifting when start of shift is recognized, a standard pressure calculating part 143 to calculate a standard line pressure PL, and a line pressure calculating part 144 to add the line pressure correction amountΔPL to a standard line pressure PL and output the value to the hydraulic control valve 52 of the hydraulic circuit of the step type automatic transmission mechanism. By this constitution, the device rapidly and accurately recognizes the actual mechanical shift starting of the step type automatic transmission mechanism and executes shift shock reduction control, whereby occurrence of a shift shock is reduced.</p> |
