Measuring and testing – Brake testing – Slidable platform
Patent
1993-03-11
1995-01-10
Raevis, Robert
Measuring and testing
Brake testing
Slidable platform
G01L 528
Patent
active
053796365
ABSTRACT:
The brakes of a two-axle vehicle are tested by weighing the vehicle and measuring the braking forces for both axles to determine the actual ratio of front axle braking force to total braking force. The deceleration applied to the vehicle is determined from the weight of the vehicle and the applied braking forces. A nominal preferred value of the ratio of front axle braking force to total braking force is calculated from the determined deceleration and the measured weight of the vehicle. The nominal preferred value varies from test to test with both the actual deceleration and the vehicle weight. For each test, upper and lower limits for the acceptability of the actual ratio of front axle braking force to total braking force are set based upon the computed nominal preferred value. These limits move from test to test with the computed nominal preferred value. The nominal preferred value, the movable limits, and the actual ratio are displayed to the user on a CRT screen. The actual ratio is displayed in the form of a bar on the screen, with the limits and nominal preferred value displayed as non-numeric indicia along the longitudinal axis of the bar.
REFERENCES:
patent: 2664745 (1954-01-01), Merrill et al.
patent: 4011751 (1977-03-01), Weiss et al.
patent: 4520663 (1985-06-01), Moore et al.
patent: 4573350 (1986-03-01), Anderson
patent: 4812744 (1989-03-01), Havel
patent: 4912458 (1990-03-01), Coneau et al.
Hunter Engineering Company
Raevis Robert
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