Filter material for motor vehicles
OwnerHasso von Blucher, Ernest De Ruiterinventors
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Abstract
An adsorption filter to prevent the emission of hydrocarbons from the tanks of motor vehicles comprises a highly air-permeable, substantially stable, three-dimensional bearer structure of wires, monofilaments or webs to which is secured a layer of granular, especially bead-structured adsorbent particles with a diameter of 0.1 to 1 mm, whereby the size of the micropores of the adsorbent is reduced in the direction of flow of the hydrocarbons emitted.
Claims11
Method of diminishing the escape of hydrocarbons from motor-vehicle tanks, characterized in that the gasoline vapors forced out when the tank is filled or escaping when the tank breathes are diverted through an adsorption filter comprising a highly air-permeable and essentially shape-retaining three-dimensional supporting skeleton of wire, monofilament, or webs with a layer of granular particles 0.1 to 1 mm in diameter of an adsorbed with a mean micropore diameter of 3 to 18 .ANG. secured to it and in that the adsorbed hydrocarbons are desorbed by fresh air suctioned in by the engine and burned in the engine, the adsorbed having micropores decreasing in size along the direction in which the emerging hydrocarbon vapors flow.
In combination, a gasoline tank and an adsorption filter for preventing escape of gasoline hydrocarbon vapors from said tank, said adsorption filter comprising a highly air-permeable and essentially shape-retaining three-dimensional support skeleton of wire, monofilament, or webs with a layer of granular adsorbed particles 0.1 to 1 mm in diameter secured to it, the layer of adsorber particles having micropores decreasing in size along the direction in which the emerging hydrocarbon vapors flow.
Dependencies are inferred from the claim text.