Enter the engine torque and select the type of drive-train into the calculator to determine the wheel torque.
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Wheel Torque Formula
The following formula is used to calculate the amount of torque at the wheel of a car.
WT = ET / DL
- Where WT is the wheel torque
- ET is the engine torque
- DL is the drive train loss
- front wheel drive = 1.1
- rear wheel drive = 1.15
- all wheel drive = 1.2 (= 20% loss)
To calculate the torque seen at the wheel, divide the engine torque by the drive train loss ratio.
What is wheel torque?
Definition:
Wheel torque is the total amount of torque delivered to a wheel from the engine after the losses inside the drive train are accounted for.
How to calculate wheel torque?
Example Problem:
The following example outlines how to calculate wheel torque.
First, determine the engine torque. In this case, the engine torque is measured to be 500 N-m.
Next, determine the type of drive train, and corresponding loss factor. For this vehicle, the drive train is all-wheel drive, which averages a 20% loss.
Finally, calculate the wheel torque using the formula above:
WT = ET / DL
WT = 500/ 1.2
WT = 416.666 N-m