Tire and Brake Interaction - A New Test Rig to Study Wheel Locking 2021-01-0972
The paper investigates the dynamics of the tire and brake during hard braking or wheel locking, from the view point of a brake manufacturer. A new test rig, named BRAD (BRembo Automotive Dynamometer) is presented which measures the forces acting both at the brake and at the tire-ground interface. Lateral forces are not measured. In the test rig, the ground is represented by a drum. The features of the test rig are presented. The measurement accuracy is declared. The first result is that, near wheel locking, a substantial part of the braking power is generated by the tire and not by the brake. The test rig quantifies such a partitioning of brake power, which is important for current and future electric motorsport activities. Some 30% of the braking power is due to tire during hard braking. The second result is that, due to such important braking power at the tire, the tire is heated up, which increases considerably the maximum friction. This implies that brakes interact with tires near wheel locking. The new test rig enables to study such an interaction.
Citation: Cantoni, C., Gobbi, M., Mastinu, G., Meschini, A. et al., "Tire and Brake Interaction - A New Test Rig to Study Wheel Locking," SAE Technical Paper 2021-01-0972, 2021, https://doi.org/10.4271/2021-01-0972. Download Citation
Author(s):
Carlo Cantoni, Massimiliano Gobbi, Giampiero Mastinu, Andrea Meschini, Stefano Vicchi
Affiliated:
Brembo SpA, Politecnico di Milano
Pages: 8
Event:
SAE WCX Digital Summit
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Test equipment and instrumentation
Tires
Wheels
Suppliers
Research and development
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