High-pressure pump for a fuel injection system of an internal combustion engine
AssigneeRobert Bosch GmbH
InventorsThomas Kleinbeck, Andreas Vogt, Alexander Redlich, Markus Koch
Life of this patent
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Abstract
A high-pressure pump having a drive shaft and at least one pump element including a pump piston driven in a reciprocating motion by the drive shaft. A ring on which the pump piston is braced via a support element is rotatably supported on a portion of the drive shaft that is disposed eccentrically to its pivot axis. The ring and/or the support element, at least in their contact region, has many microscopic indentations, and a solid lubricant film is applied to the ring and/or to the support element, at least in their contact region.
Claims21
A high-pressure pump for a fuel injection system of an internal combustion engine, comprising
- a drive shaft (12),
- at least one pump element (14), which has a pump piston (20) driven in a reciprocating motion by the drive shaft (12),
- a ring (18) rotatably supported on a portion (16) of the drive shaft (12) disposed eccentrically to the pivot axis (13) of the drive shaft, on which ring the pump piston (20) is braced via a support element (24),
- many microscope indentations (42) formed in the ring (18) and/or the support element (24), at least in their contact region;
- and
- a solid lubricant film (40) is applied to at least one of the ring (18) and the support element (24) in the region of the microscopic indentations.
A high-pressure pump for a fuel injection system of an internal combustion engine, comprising
- a drive shaft (12).
- at least one pump element (14), which has a pump piston (20) driven in a reciprocating motion by the drive shaft (12),
- a ring (18) rotatably supported on a portion (16) of the drive shaft (12) disposed eccentrically to the pivot axis (13) of the drive shaft, on which ring the pump piston (20) is braced via a support element (24),
- many microscope indentations (42) formed in the ring (18) and/or the support element (24), at least in their contact region;
- and
- a solid lubricant film (40) applied to the ring (18) and/or to the support element (24), at least in their contact region, wherein the microscopic indentations (42) are embodied in the form of dimples.
A high-pressure pump for a fuel injection system of an internal combustion engine, comprising
- a drive shaft (12),
- at least one pump element (14), which has a pump piston (20) driven in a reciprocating motion by the drive shaft (12),
- a ring (18) rotatably supported on a portion (16) of the drive shaft (12) disposed eccentrically to the pivot axis (13) of the drive shaft, on which ring the pump piston (20) is braced via a support element (24),
- many microscope indentations (42) embodied in the form of grooves formed in the ring (18) and/or the support element (24), at least in their contact region;
- and
- a solid lubricant film (40) applied to the ring (18) and/or to the support element (24), at least in their contact region, and wherein the grooves intersect.
Dependencies are inferred from the claim text.