| 摘要 |
PCT No. PCT/FR94/01167 Sec. 371 Date Feb. 6, 1996 Sec. 102(e) Date Feb. 6, 1996 PCT Filed Oct. 6, 1994 PCT Pub. No. WO95/09596 PCT Pub. Date Apr. 13, 1995Adjustable flow electromagnetic valve having a closing assembly (8) movable within a chamber (7) with a passage (3) linked to a high pressure area and a passage (4) linked to a low pressure area. The electromagnetic valve is designed such that the closing assembly consists of a valve (8) freely movable within the chamber (7). The disk-shaped valve (8) is flat, light and non-deformable and is capable of being automatically brought to its fluid flow position when pressure within the inlet passage (HP) (5) tends to a value approaching a predefined set pressure; the electromagnetic valve is also designed such that fluid flow through the valve (8) is achieved by openings (10) formed in the thickness of the valve, the openings being arranged in a median area outside the circumference of the inlet passage (3) so that the latter can be closed when the valve (8) is electromagnetically returned. It is further characterized by adjusting the electromagnetic return force exerted by the electromagnet for placing the valve (8) at a predetermined point between opening and closing to provide a predetermined constant flow, and for alternately shifting it, according to a predetermined frequency, to provide an adjustable alternating flow of the same frequency and of variable amplitude, resulting in sequential, pulsed, rhythmic operation.
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