direction (fig. 7-14 ). In both cases, the output member
is turning in the opposite direction of the input member.
Coupling ((Torque Converter Operation)
The automatic transmission is coupled to the engine
through a torque converter. The torque converter is used
with the automatic transmission because it does not have
to be manually disengaged by the operator each time the
vehicle is stopped. The cushioning effect of the fluid
coupling within the torque converter allows for shifting
without interruption of engine torque application.
The torque converter serves two primary functions.
First, it acts as a fluid coupling to connect engine power
smoothly through oil to the transmission gear train.
Second, it multiplies the torque from the engine when
additional performance is desired.
Figure 7-14.Reverse drive.