IP Library › Granted Patent US 7,647,918
Granted Patent B2
US 7,647,918 · App. 10/595,451 · Granted Jan 19, 2010

Radial piston pump for common rail injection systems

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Quick Facts
Patent No.
US 7,647,918
App. No.
10/595,451
Granted
Jan 19, 2010
Kind
B2
Abstract

A high-pressure radial piston pump for common rail injection systems has a pump housing ( 1 ), a drive shaft ( 2 ), at least one pump piston ( 3 ) which can move in a radial direction in relation to the drive shaft ( 2 ) and a high pressure accumulator ( 4 ) integrated into the high-pressure radial piston pump. The high pressure accumulator ( 4 ) is embodied in the form of a ring.

Claims (47)

1. A high pressure radial piston pump for common rail injection systems comprising:

a pump housing,

a drive shaft,

at least one pump piston, which can move in a radial direction in relation to the drive shaft and

a high pressure accumulator integrated into the high pressure radial piston pump,

wherein the high pressure accumulator is embodied in the form of a complete ring.

2. A high pressure radial piston pump according to claim 1 , wherein

the high pressure accumulator is arranged concentric in relation to the drive shaft.

3. A high pressure radial piston pump according to claim 1 , wherein

the high pressure accumulator is formed by a ring groove realized in the pump housing at the front side and sealed with a cover.

4. A high pressure radial piston pump according to claim 3 , wherein

at least one metallic sealing surface is formed on the pump housing and/or on the cover in order to seal the high pressure accumulator.

5. A high pressure radial piston pump according to claim 3 , wherein

the cover is connected to the pump housing at least by means of one central screw arranged concentric in relation to the ring groove.

6. A high pressure radial piston pump according to claim 1 , wherein

the high pressure accumulator is embodied as a ring groove which is realized in the outer circumference of a rotationally symmetrical pump insert.

7. A high pressure radial piston pump according to claim 6 , wherein

the outer circumference of the pump insert operates together with a corresponding inner circumference surface of the pump housing.

8. A high pressure radial piston pump according to claim 6 , wherein

the pump insert is embodied in cylindrical form.

9. A high pressure radial piston pump according to claim 1 , comprising

at least one high pressure connection embodied on the high pressure accumulator in order to supply at least one injector of an internal combustion engine.

10. A high pressure radial piston pump according to claim 1 , wherein

the high pressure accumulator is effectively connected with a pressure control valve integrated into the high pressure radial piston pump or arranged on the high pressure radial piston pump.

11. A high pressure radial piston pump for common rail injection systems comprising:

a pump housing,

a drive shaft,

at least one pump piston, which can move in a radial direction in relation to the drive shaft and

a complete-ring shaped high pressure accumulator integrated into the high pressure radial piston pump.

12. A high pressure radial piston pump according to claim 11 , wherein

the ring shaped high pressure accumulator is arranged concentric in relation to the drive shaft.

13. A high pressure radial piston pump according to claim 11 , wherein

the ring shaped high pressure accumulator is formed by a ring groove realized in the pump housing at the front side and sealed with a cover.

14. A high pressure radial piston pump according to claim 13 , wherein

at least one metallic sealing surface is formed on the pump housing and/or on the cover in order to seal the ring shaped high pressure accumulator.

15. A high pressure radial piston pump according to claim 13 , wherein

the cover is connected to the pump housing at least by means of one central screw arranged concentric in relation to the ring groove.

16. A high pressure radial piston pump according to claim 11 , wherein

the ring shaped high pressure accumulator is embodied as a ring groove which is realized in the outer circumference of a rotationally symmetrical pump insert.

17. A high pressure radial piston pump according to claim 16 , wherein

the outer circumference of the pump insert operates together with a corresponding inner circumference surface of the pump housing.

18. A high pressure radial piston pump according to claim 16 , wherein

the pump insert is embodied in cylindrical form.

19. A high pressure radial piston pump according to claim 11 , comprising

at least one high pressure connection embodied on the ring shaped high pressure accumulator in order to supply at least one injector of an internal combustion engine.

20. A high pressure radial piston pump according to claim 11 , wherein

the ring shaped high pressure accumulator is effectively connected with a pressure control valve integrated into the high pressure radial piston pump or arranged on the high pressure radial piston pump.