Unlock instant, AI-driven research and patent intelligence for your innovation.

High pressure pumps for fuel injection systems

A high-pressure pump and high-pressure technology, which is applied to the components of pumping devices for elastic fluids, liquid fuel engines, pumps, etc., can solve problems such as loss of sealing function of pressure valves, and achieve the effect of saving installation space

Active Publication Date: 2021-10-01
ROBERT BOSCH GMBH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this damage occurs on the valve seat, this can lead to a loss of the sealing function of the pressure valve even after a short operating time

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High pressure pumps for fuel injection systems
  • High pressure pumps for fuel injection systems
  • High pressure pumps for fuel injection systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] figure 1 A longitudinal section through a high-pressure pump 100 of a fuel injection system is shown, wherein only the relevant regions are shown. The high-pressure pump 100 is known from the prior art and serves to supply injectors (not shown) with fuel under high pressure, wherein this can be done directly or via a common rail.

[0015] The housing of the high-pressure pump 100 consists of a cylinder housing 1 and a cylinder head 2 screwed to the cylinder housing. The valve housing 3 is screwed into the cylinder housing 1 , which is sealed from the cylinder head 2 . A camshaft (not shown) which forms the drive of the high-pressure pump 100 is rotatably mounted in the cylinder housing 1 .

[0016] In a guide bore 35 formed in the valve housing 3 , the pump piston 5 , which interacts at least indirectly with a not shown camshaft, is guided in a longitudinal direction 90 extending perpendicularly to the camshaft.

[0017] In the valve housing 3 , in a region facing aw...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a high-pressure pump (100) for conveying fluid under high pressure, wherein the high-pressure pump (100) comprises a volume-variable compression chamber (6) and a pressure valve (101). The pressure valve (101) has a valve surface (51) formed on the high-pressure valve piston (40) and a valve seat (15) formed on the valve carrier (10). The valve surface (51) cooperates with the valve seat (15) and thereby opens and closes the hydraulic connection of the compression chamber (6) to the high pressure bore (9). Upstream of the valve seat (15), a cavity volume (50) is formed in the high-pressure valve piston (40).

Description

technical field [0001] The invention relates to a high-pressure pump, in particular for a fuel injection system, which has a pressure valve. The high-pressure pump compresses fluid, especially fuel. Background technique [0002] A high-pressure pump for a fuel injection system is known from laid-open document DE 2014 10 218 488 A1. The high-pressure pump serves to deliver fluids, in particular fuel, under high pressure. Known high-pressure pumps comprise a variable-volume compression chamber and a pressure valve. The pressure valve has a valve surface formed on the high-pressure valve piston and a valve seat formed on the valve carrier. The valve face cooperates with the valve seat and thus opens and closes the hydraulic connection from the compression chamber to the high-pressure bore. [0003] During operation of high-pressure pumps, cavitation corrosion, ie material erosion of the pressure valve in the area of ​​the valve seat, can occur under certain operating condit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F04B1/0404F04B53/10
CPCF04B1/0404F04B53/10
Inventor T·米尔纳D·施魏格尔
Owner ROBERT BOSCH GMBH