TW12.8 wheel torque transducer 8.1 kN·m

TW12.8: wheel torque transducer, 8.1 kN·m

The TW12.8 is a wheel torque transducer that gives one channel of torque data, the drive and brake torque at the wheel, up to 8.1 kN·m (6,000 lbf·ft); that is also its combined steer/camber moment rating. A four-arm strain gage bridge of 525 Ω is mounted in a stainless steel ring, Ø 340.18 × 25.65 mm, weatherproof sealed, that adapts to 14 in and larger wheels. The output is 1.5 mV/V nominal at up to 10 V excitation, with non-linearity of 0.1 % of full scale or less. It is temperature compensated from 24 to 121 °C and usable from −40 to 149 °C, or 177 °C short term.

Its geometry is identical to that of the TW12.8ER, which has a lower rating of 4,000 lbf·ft (5.4 kN·m) and enhanced resolution, so both use the same adapters. The hub adapter bolts to the inner circle of eighteen holes and the rim adapter to the outer circle, with custom M10 × 1.5 screws tightened crosswise to 81 N·m; the wheel is balanced with its tire. With the TW2 electronics, the default ±10 V analog output scales the torque channel to 9,000 N·m, that is 900 N·m/V.

It is designed for passenger cars and light-duty trucks, where its data serves braking system, vehicle stability and driveline development.