System for automatic tire inflation
First Claim
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1. In an apparatus for automatically delivering a make-up air flow from a vehicle air supply source to maintain a desired air pressure in at least one tire when a leakage of tire air occurs, the improvement comprising a flowmeter for determining leakage severity by measuring a rate of said make-up air flow, said flowmeter including:
- a porous media effective for creating a pressure differential across said porous media relative to said rate of said makeup air flow, said pressure differential across said porous media being not more than 5.6% of said desired air pressure in said tire; and
a pressure transducer which directly measures said pressure differential across said porous media.
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Abstract
An apparatus and method for measuring gas flow rates and an improved automatic vehicle tire inflation system which utilizes the inventive gas flow measurement apparatus and method. The gas flow measuring apparatus and method utilize a porous media material effective for creating an appropriate pressure differential relative to the gas flow rate.
45 Citations
14 Claims
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1. In an apparatus for automatically delivering a make-up air flow from a vehicle air supply source to maintain a desired air pressure in at least one tire when a leakage of tire air occurs, the improvement comprising a flowmeter for determining leakage severity by measuring a rate of said make-up air flow, said flowmeter including:
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a porous media effective for creating a pressure differential across said porous media relative to said rate of said makeup air flow, said pressure differential across said porous media being not more than 5.6% of said desired air pressure in said tire; and a pressure transducer which directly measures said pressure differential across said porous media. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification