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High-pressure pump

A technology for high-pressure pumps and pump components, applied in pumps, multi-cylinder pumps, fuel injection pumps, etc., to achieve the effects of reducing noise, improving drive, and optimizing design

Inactive Publication Date: 2015-12-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resulting unwanted noise

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0017] figure 1 According to an exemplary embodiment of the invention, the high-pressure pump 1 is shown in a schematic cutaway section. In particular, the high-pressure pump 1 can be designed as a radial piston pump or as a crankshaft piston pump. The high-pressure pump 1 is particularly suitable as a fuel pump for a fuel injection system of an air-compressed self-ignition internal combustion engine. A preferred use of the high-pressure pump 1 is in fuel injection systems having a fuel distribution rail, a so-called common rail, which stores diesel fuel under high pressure. However, the high-pressure pump 1 according to the invention is also suitable for other uses.

[0018] The high-pressure pump 1 has a multi-part pump housing with a housing part 2 . Arranged in the housing part 2 is a drive shaft 3 which is accommodated in a suitable manner in the pump housing. In this case, the drive shaft 3 can be driven in rotation by the internal combustion engine, so that the driv...

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Abstract

The invention relates to a high pressure pump (1), which is used in particular as a radial or series piston pump for fuel injection systems of air-compressing, self-igniting internal combustion engines, comprising at least one pump assembly (6) and one drive shaft (3) which comprises at least one cam (5) assigned to the pump assembly (6). The pump assembly (6) comprises a roller (23) running on the running surface (24) of the cam (5), a roller shoe (22) which receives the roller (23), a tappet body (20) in which the roller shoe (22) is introduced, a pump piston (11) which can be actuated in an actuating direction (13) by the cam (5) by means of the roller (23) and the roller shoe (22) and a carrier element (25) which carries the pump piston (11) opposite the actuating direction (13). According to the invention, the carrier element (25) is designed as a partially elastically deformable carrier element (25). The carrier element (25) according to the invention further comprises at least one elevation (37) facing the roller shoe (22) on which the pump piston (11) is supported. A play between the pump piston (11) and the roller shoe (22) can thus be reduced according to the invention in such a manner that undesired noises can be reduced.

Description

technical field [0001] The invention relates to a high-pressure pump, especially a radial piston pump or a crankshaft piston pump. The invention relates in particular to the field of fuel pumps for fuel injection devices of self-igniting internal combustion engines for compressed air. Background technique [0002] A high-pressure pump for a fuel injection system of an internal combustion engine is known from DE 10 2005 046 670 A1. The known high-pressure pump has a pump housing in which a pump element is arranged, the pump element comprising a pump piston driven in a stroke movement by a drive shaft. The pump piston is guided displaceably in a cylinder bore of a part of the pump housing and delimits a pump working chamber in the cylinder bore. The pump piston is supported indirectly on the drive shaft via a hollow-cylindrical push rod, wherein the push rod is guided displaceably in a bore in a part of the pump housing in the direction of the longitudinal axis of the pump p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/10F04B1/04
CPCF02M59/102F04B1/0426
Inventor S·安布罗克M·克里斯滕S·盖泽尔哈特
Owner ROBERT BOSCH GMBH