AUTOMATIC TRANSMISSION MOUNTED WITH A TORQUE CONVERTER AND AUTOMATIC SHIFT METHOD USING THE SAME, FOR MOUNTING SEPARATELY A FIRST DRIVING SHAFT RECEIVING ROTARY POWER DIRECTLY FROM AN ENGINE AND A SECOND DRIVING SHAFT RECEIVING ROTARY POWER OF A TORQUE CONVERTER, AND HAVING SHIFT UNITS CHANGING SPEED BY EACH DRIVING SHAFT

摘要

PURPOSE: An automatic transmission mounted with a torque converter and an automatic shift method using the transmission are provided to simplify the structure of a planetary gear unit and to obtain fuel efficiency of an engine nearly same as a manual transmission. CONSTITUTION: An automatic transmission mounted with a torque converter is composed of the torque converter for changing automatically the speed according to the change of load by receiving rotary power of an engine; a first driving shaft(1) for receiving directly rotary power from the engine; a second driving shaft(2) for receiving the rotary power through the torque converter; a first shift unit(A) for automatically changing rotational speed transmitted from the first driving shaft; a second shift unit(B) for combining the rotary power of the first shift unit and the second driving shaft and outputting shifted rotary power of multiple speed ratios by adding a reverse-rotation device; and an output shaft(3) for receiving the rotary power shifted by the second shift unit.