| 摘要 |
This fuel pressure regulator comprises: - a first chamber 0 delimited by the body of the regulator and a diaphragm 10 and supplied via a duct 5 with fuel whose pressure P0 is regulated by a leakage flow rate passing via a return duct 6 to the tank of the engine and varying as a function of the distance separating the edge 7 of this return duct from this diaphragm 10; - a second chamber 1 delimited by the diaphragm 10, a diaphragm 20 and the body of the regulator which communicates with a first fluid at a pressure P1 via a duct 11; - a third chamber 2 delimited by the diaphragm 20, a diaphragm 30 and the body of the regulator which communicates with a second fluid at a pressure P2 via a duct 21; - a fourth chamber 3 delimited by the diaphragm 30 and the body of the regulator which communicates with a third fluid at a pressure P3 via a duct 31, this diaphragm 30 being subjected, on the one hand, to the action of a spring 32 bearing on a stationary wall 33 of the regulator and, on the other hand, being solidly attached to the two other diaphragms 10, 20 by the intermediary of a rod 8. Application: especially to a fuel-injection installation in an internal combustion engine. <IMAGE>
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