Measuring and testing – Vehicle chassis – Steering
Patent
1974-07-30
1977-04-12
Myracle, Jerry W.
Measuring and testing
Vehicle chassis
Steering
73133R, G01M 1500
Patent
active
040167542
ABSTRACT:
An improved testing device for operating a wheeled automotive vehicle under power while it is standing still. This type of operation is desired in such endeavors as service diagnosis, measurement of exhaust emissions, and laboratory testing. In this device, power is absorbed by friction between the vehicle's driving wheels and a stationary portion of the testing device. Overheating of the tire is prevented by interposing a fluid such as water or air at the juncture of the tire and the power-absorber, or otherwise cooling the power-absorber surface. Vehicular traction load, or tractive effort, may be adjusted by adjusting the contact forces between the tire and the power-absorber. Vehicular tractive effort may be measured as the thrust force applied by the tire to the power-absorber. Speed may be measured from the motion of the driving wheel. Power may be computed automatically to provide a continuous presentation of speed and horsepower to the test operator. This testing device is sometimes called a vehicular dynamometer or chassis dynamometer. It possesses many of the characteristics of traction or drawbar dynamometers, except that the vehicle remains essentially stationary.
REFERENCES:
patent: 479979 (1892-08-01), Glenn
patent: 1513430 (1924-10-01), Scott
patent: 2576544 (1951-11-01), Smith
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