Motor vehicle brake test apparatus and method

Details Motor vehicle brake test apparatus and method Motor vehicle brake test apparatus and method

1975-10-09

1976-06-15

Gill, James J.

Measuring and testing

Brake testing

Roller or belt wheel support

G01L 528

Patent

active

039629147

ABSTRACT:
The engine of a motor vehicle is used to accelerate a flywheel up to a suitable test speed through rollers engaged with driven wheels of the vehicle. Then, when the wheels are braked, one torsion coupling gives a signal corresponding to the total braking force on both wheels and another torsion coupling between two of the rollers gives a signal corresponding to the braking force on one wheel. The braking force on the other wheel is obtained through a subtraction circuit. For testing undriven wheels, the flywheel is first brought up to speed by means of a set of driven wheels, then a clutch is released to free the flywheel while the rollers are stopped and the undriven wheel brought into position, after which the clutch is re-engaged and the undriven wheels are tested. A slip rate circuit is provided to compare the speed of the rollers applying the energy of the flywheel to the wheels under test with the respective speeds of idler rollers engaged with the individual wheels to provide an indication when the brakes are applied too suddenly or to check the safe operation of an anti-lock brake control system if the vehicle is equipped with such a system.

REFERENCES:
patent: 1801927 (1931-04-01), Langbein
patent: 2022340 (1935-11-01), Deane
patent: 2327617 (1943-08-01), Bennett
patent: 3577777 (1971-05-01), Whelan et al.

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