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In a magnetic polarization device for a fuel supply circuit, comprising multi-pole bar magnets contained in a casing which has internal passage vanes for the fuel, each bar magnet is made up of a different number of contiguous bipolar magnetic segments with magnetic fields of increasing intensity fr

In a magnetic polarization device for a fuel supply circuit, comprising multi-pole bar magnets contained in a casing which has internal passage vanes for the fuel, each bar magnet is made up of a different number of contiguous bipolar magnetic segments with magnetic fields of increasing intensity from one end to the other, which are aligned axially with one another with like-directed magnetic polarities adjacent each other, and which have unlike-directed magnetic polarities corresponding to the ends of each bar, and one or more fluid-carrying bars made of a ferromagnetic material are arranged parallel to each multi-pole bar magnet.

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[ I claim:] [1.] Magnetic-polarization device (1) for a fuel-supply circuit (10) for burners or internal-combustion engines, comprising parallel multi-pole bar magnets (2) lodged inside a casing (6) having internal passage vanes (9) along which said fuel can flow, wherein 4 each of said multi-pole b

[ I claim:] [1.] Magnetic-polarization device (1) for a fuel-supply circuit (10) for burners or internal-combustion engines, comprising parallel multi-pole bar magnets (2) lodged inside a casing (6) having internal passage vanes (9) along which said fuel can flow, wherein 4 each of said multi-pole bar magnets (2) is made up of an odd number of contiguous bipolar magnetic segments (2a, 2b, 2c) that are aligned axially, facing one another with like-directed magnetic polarities adjacent each other, and thus having polarities of opposite directions corresponding to the ends of each bar (2), characterized in that said magnetic segments have concatenated magnetic fields of increasing intensity from one end to the other, as well as in that, between each pair of multi-pole bar magnets (2), equidistant from the latter, is arranged one parallel flux carrying bar (3, 3e) that is made of a ferromagnetic material, so as to generate a plurality of flux lines that traverse zones (9) through which the fuel to be treated passes with flux rising along each bar (3, 3e).