Granted Patent B2

US 6,848,477 · App. 10/342,030 · Granted Feb 1, 2005

Abstract

Claims (23)

1. A fuel system for a motor comprising:

(a) a fuel pump to provide pressurized fuel;

(b) a fuel rail defining, at least one fuel passageway therein, said fuel rail being in fluidic communication with said fuel pump to receive pressurized fuel therefrom;

(c) a fuel injector in fluidic communication with said fuel rail to deliver fuel to an engine of the motor vehicle; (d) a fuel pressure pulse damping system including at least one restrictor located within said at least one fuel passageway, wherein said at least one restrictor substantially limits a maximum operating system pulse magnitude, said at least one restrictor reducing a cross sectional flow area of said at least one fuel passageway without introducing compliancy into the system.

2. A fuel pressure damping system according to claim 1 , further comprising at least one compliance damper.

3. A fuel pressure damping system according to claim 1 , wherein each of said at least one restrictor are further comprised of at least one orifice.

4. A fuel system according to claim 1 , wherein each of said at least one restrictor is formed by reducing a diameter of at least one of said at least one fuel passageway.

5. A fuel system according to claim 1 , wherein said at least one restrictor is formed at a connection in at least one of said at least one fuel passageway.

6. A fuel system according to claim 1 , wherein said at least one restrictor is formed by partially blocking at least one of said at least one fuel passageway.

7. A fuel system according to claim 1 , wherein said value of maximum operating system pulse magnitude, M L , and a dimension r of said restrictor are substantially related by the formula M L =A+Br.

8. A fuel system according to claim 1 , wherein said value of maximum operating system pulse magnitude, M L , and a dimension r of said restrictor are substantially linearly related.

9. A fuel system according to claim 1 , wherein said value of maximum operating system pulse magnitude, M L , and a dimension r of said restrictor are substantially inversely related.

10. A fuel system according to claim 1 , wherein said value of maximum operating system pulse magnitude, M L , and a dimension r of said restrictor are substantially related by the formula M L =A+Br+Cr 2 .

11. A fuel system according to claim 1 , further wherein a maximum operating system pulse magnitude, M L , is imposed upon the fuel system by a dimension r of said restrictor that is substantially related to M L by the formula M L =A+Br+Cr 2 .

12. A method of limiting the maximum operating system pulse magnitude of a fuel system comprising the steps of:

(a) Providing a fuel system with at least one fuel passage; and,

(b) introducing a restriction, having a dimension r, in said at least one fuel passage, without introducing compliancy into the system said dimension r having a relation to a limited maximum operating system pulse magnitude, M L , substantially in accordance with the formula M L =A+Br.

13. A method of limiting the maximum operating system pulse magnitude of a fuel system comprising the steps of:

(a) Providing a fuel system with at least one fuel passage; and,

(b) introducing a restriction, having a dimension r, in said at least one fuel passage without introducing compliancy into the system, said dimension r having a relation to a limited maximum fuel system pulsation magnitude, M L , substantially in accordance with the formula M L =A+Br+Cr 2 .

14. A fuel system according to claim 1 , wherein said compliance damper is an internal style damper.

15. The method of claim 12 further comprising the step of providing compliancy in the system with a means other than the restriction.

16. The method of claim 13 further comprising the step of providing compliancy in the system with a means other than the restriction.

Assignments (18)