| 摘要 |
PURPOSE:To check the occurrence of a shift shock in power on-off up-shift by installing a first speed detecting means, detecting the rotational speed of an output shaft for an engine, a second speed detecting means, detecting the rotational speed of a rotating means for an automatic transmission, and a power-off judging means, respectively. CONSTITUTION:Correlation between rotational speed Ne detected by a first speed detecting means 140 and another rotational speed Nt detected by a second speed detecting means 141 depends upon a car load sttae, and when rotational speed of an input shaft of a main transmission is detected by the second speed detecting means 141, by way of example, it is Ne >= Nt at time of power-on but Ne < Nt at time of power-off, thus power on-off is accurately judgeable. When a shift control means 130 judges the shift to the upper third speed and performs a speed change, if a power-off judging means 130 judges the power-off, time ranging from release of torque transfer of the second speed before the shift to starting of torque transfer of the third speed after the shift is delayed via a timing control valve SL5. |
