Testing device for wheeled automotive vehicles
First Claim
1. A testing device for wheeled automotive vehicles comprising:
- first support means for engaging and restraining nonrotating elements of a vehicle, such as axle, nondriving wheel, and frame members;
nonrotating second support means for slidably engaging the tread surface of said vehicle'"'"'s driving tires;
means for interposing a fluid between said second support means and said tires;
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Accused Products
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.
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Citations
17 Claims
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1. A testing device for wheeled automotive vehicles comprising:
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first support means for engaging and restraining nonrotating elements of a vehicle, such as axle, nondriving wheel, and frame members; nonrotating second support means for slidably engaging the tread surface of said vehicle'"'"'s driving tires; means for interposing a fluid between said second support means and said tires; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A testing device for wheeled automotive vehicles comprising:
- nonrotating support means for vehicular driving wheels;
means for interposing fluid between said support means and said vehicular driving wheels; means for restraining vehicular horizontal motion, said means being horizontally connectable to said nonrotating support means; means for adjusting the forces between said nonrotating support means and said vehicle driving wheels, thereby adjusting the propulsive load applied - View Dependent Claims (9, 10)
- nonrotating support means for vehicular driving wheels;
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11. A testing device of wheeled automotive vehicles comprising:
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nonrotating support means for vehicular driving wheels; means for interposing fluid between said support means and said vehicular driving wheels; means for restraining vehicular horizontal motion, said means being horizontally connectable to said nonrotating support means; means for measuring the horizontal force required to restrain vehicular - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification