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The torque converter component calculates upstream and
downstream torques based on the input speed ratio:
SpeedRatio=Vel3/Vel1
The torque converter's torque ratio and capacity
factor are calculated using two dimensional lookup
functions defined by TorqueRatios versus TRSpeedRatios
and CapacityFactors versus CFSpeedRatios.
With the CapacityFactor and TorqueRatio known, the
output torques are calculated as:
Torque1=-(Vel1*60.0/2.0/PI/CapacityFactor)2
Torque3=-TorqueRatio*Torque1
The state TCTorque is used to smooth the calculated
upstream torque Torque1 using a first order lag.
The downstream torque is positive and the upstream
torque is negative when the upstream input speed is
faster than the downstream input speed.
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