IP Library Granted Patent US 10,781,778
Granted Patent B2
US 10,781,778 · App. 16/072,058 · Granted Sep 22, 2020

High-pressure fuel pump

Inventors: Detlef Haupt (Regenstauf / Steinsberg, DE); Yavuz Kurt (Roding, DE); Bernd Wöllisch (Chamerau, DE)
Assignee: VITESCO TECHNOLOGIES GMBH
F02M55/04F02M59/025F02M59/466F02M59/48F02M59/44F02M59/445F02M2200/31F02M2200/315F04B53/004F04B53/16
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Quick Facts
Patent No.
US 10,781,778
App. No.
16/072,058
Granted
Sep 22, 2020
Kind
B2
Abstract

Various embodiments may include a high-pressure fuel pump with: a pump housing including a pressure chamber and a pump piston movable up and down within the pressure chamber along a movement axis; and a low-pressure damper including a damper volume arranged on the pump housing and damper elements distributed symmetrically around a damper longitudinal axis. The damper longitudinal axis is arranged at an angle of between 5° and 175° in relation to the movement axis.

Claims (24)

1. A high-pressure fuel pump comprising:

a pump housing including a pressure chamber and a pump piston movable up and down within the pressure chamber along a movement axis; and

a low-pressure damper including a damper volume arranged on the pump housing and damper elements distributed symmetrically around a damper longitudinal axis;

wherein the damper longitudinal axis is arranged at an angle of between 5° and 175° in relation to the movement axis;

wherein an intersection point between the damper longitudinal axis and the movement axis is disposed within the pressure chamber at a location within a travel of the pump piston.

2. The high-pressure fuel pump as claimed in claim 1 , wherein the damper longitudinal axis is substantially perpendicular to the movement axis of the pump piston.

3. The high-pressure fuel pump as claimed in claim 1 , wherein the low-pressure damper further comprises:

a damping device and a damper cover jointly defining the damper volume of the low-pressure damper; and

a spacer for prestressing the damping device;

wherein the damper elements are arranged in the damper volume along the damper longitudinal axis.

4. The high-pressure fuel pump as claimed in claim 1 , wherein the pump housing comprises:

an inflow region for supplying fuel to the pressure chamber; and

a drive region situated opposite the pressure chamber along the movement axis of the pump piston; and

drive elements for driving the pump piston arranged in said drive region;

wherein the inflow region and the drive region are fluidically connected to one another by the damper volume.

5. The high-pressure fuel pump as claimed in claim 4 , wherein the pump housing includes:

an inflow region bore extending substantially parallel in relation to the damper longitudinal axis for connecting the inflow region to the damper volume; and

an equalizing bore extending substantially parallel to the movement axis for connecting the drive region to the damper volume;

wherein both the inflow region bore and the equalizing bore issue into the damper volume opposite the damper cover along the damper longitudinal axis.

6. The high-pressure fuel pump as claimed in claim 1 , further comprising an inlet valve arranged on the pump housing, said inlet valve having a valve axis along which a valve element moves during operation, wherein the valve axis is arranged substantially parallel to the movement axis of the pump piston.

7. The high-pressure fuel pump as claimed in claim 6 , wherein the inlet valve comprises a digital inlet valve with a coil and an electrical plug-in connection;

wherein the coil and/or the electrical plug-in connection can be rotated through 360° about the valve axis.

8. The high-pressure fuel pump as claimed in claim 6 , further comprising an inlet valve arranged at the inflow region.

9. The high-pressure fuel pump as claimed in claim 1 , wherein the pump housing comprises a forged housing.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 28, 2020
From: CONTINENTAL AUTOMOTIVE GMBH
To: VITESCO TECHNOLOGIES GMBH
Reel/Frame 053335/0887 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 23, 2018
From: HAUPT, DETLEF; KURT, YAVUZ; WOILLISCH, BERND
To: CONTINENTAL AUTOMOTIVE GMBH
Reel/Frame 046430/0272 →
Priority Claims (1)
DE 10 2016 201 082 · Jan 26, 2016 · national
Continuity (1)
Related Publication 20190032615A1 · Jan 31, 2019