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Gasket for high-pressure pump and high-pressure pump comprising said gasket

A gasket and high-pressure delivery technology, which is applied in the direction of pumps, multi-cylinder pumps, fuel injection pumps, etc., can solve problems such as failure to provide fuel early and leakage

Inactive Publication Date: 2010-11-10
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, this type of gasket has proven to have a number of disadvantages
[0006] In particular, even if leak tested prior to sale, gaskets of this type are often returned by purchasers because they do not give an early indication of a fuel leak occurring after an extended period of time

Method used

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  • Gasket for high-pressure pump and high-pressure pump comprising said gasket
  • Gasket for high-pressure pump and high-pressure pump comprising said gasket
  • Gasket for high-pressure pump and high-pressure pump comprising said gasket

Examples

Experimental program
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Embodiment Construction

[0018] exist figure 1 , reference numeral 1 designates a high-pressure pump (only a part of this pump is shown in the figure), comprising a pump body 2 , a pumping element 4 defined by a cylinder 5 and a piston 6 , and a cover 8 of the cylinder 5 .

[0019] The pump 1 also comprises a low-pressure supply line 9 which supplies fuel at low pressure to the pumping element 4, a supply valve 10 housed in the cylinder 5, a delivery valve 11, and a high-pressure delivery line 12 which will be fed by the delivery valve 11 The high-pressure fuel discharged and compressed by the pumping element 4 is supplied to a common rail (not shown in the drawings).

[0020] In order to prevent fuel leakage between the pump body 2 and the cover 8 of the cylinder 5 when the pump 1 is in operation, the pump 1 includes a gasket 13 .

[0021] refer to figure 2 The gasket 13 comprises a sheet 14 extending mainly in a plane P, having a generally rectangular shape and defining two opposing surfaces 15 a...

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PUM

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Abstract

A high-pressure pump is provided with a high-pressure delivery line (12), a low- pressure supply line (9), a pumping element (4) defined by a piston (6) and cylinder (5), a cylinder (5) head (8), and a gasket (13), which latter is essentially flat and is provided with a sheet (14) extending in a first plane (P) and having a first hole (17) defining part of the low-pressure supply line (9), a second hole (18) into which the cylinder (5) head (8) can be inserted, and a third hole (19) defining part of the high-pressure delivery line (12); and with a coating (34) of elastic material that extends only around the first and second holes (17, 18).

Description

technical field [0001] The invention relates to a gasket and a high-pressure pump comprising said gasket. In particular the invention relates to gaskets and high pressure fuel supply pumps for internal combustion engines. Background technique [0002] A high pressure pump generally comprises a pump body, at least one pumping element defined by a cylinder and a piston, and a cylinder head. The pumping element receives fuel from a low pressure supply line, compresses it and sends it along a high pressure delivery line to a high pressure manifold or what is known as a "common rail". [0003] To prevent leakage, a substantially flat gasket placed between the pump body and the cylinder head is usually used: this gasket has a first hole defining part of the low-pressure supply line, a second hole into which the cylinder head can be inserted, and a high-pressure delivery line. The third hole in the part of the pipeline. [0004] Document DE 10310124 discloses a flat gasket with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/08F02M59/44F04B1/04
CPCF02M2200/16F02M59/44F16J2015/085F16J15/0818F16J2015/0856F04B1/0448F04B1/0421
Inventor R·约里佐A·格里马尔迪P·斯科托迪圣托洛
Owner ROBERT BOSCH GMBH