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High-pressure fuel pump for a fuel system of an internal combustion engine

A high-pressure fuel pump and fuel system technology, applied in the charging system, fuel injection pump, fuel injection device and other directions, can solve the problems of reducing the fatigue strength, service life failure, high vibration load of the high-pressure fuel pump, etc., to reduce vibration, The effect of reducing heat load and reducing noise emission

Inactive Publication Date: 2015-03-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to undesired operating noises, relatively high vibration loads occur, which can reduce the fatigue strength of the high-pressure fuel pump and undesirably lead to a loss of service life

Method used

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  • High-pressure fuel pump for a fuel system of an internal combustion engine
  • High-pressure fuel pump for a fuel system of an internal combustion engine
  • High-pressure fuel pump for a fuel system of an internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0026] exist figure 1 , the fuel system for an internal combustion engine bears the reference numeral 10 as a whole. The fuel system includes a fuel tank 12 from which a primary fuel pump 14 delivers fuel into a low pressure line 16 . The pressure in the low-pressure line 16 is regulated by means of a pressure control valve or pressure regulating valve 18 .

[0027] The low-pressure line 16 leads to a high-pressure fuel pump 20, figure 2 The structure of the high-pressure fuel pump is shown in detail in . The high-pressure fuel pump 20 is mechanically driven by the internal combustion engine 10 . The high-pressure fuel pump compresses fuel at very high pressure and delivers the fuel to a high-pressure fuel accumulator 22 also referred to as a “Rail”. A plurality of injectors 24 are connected to the high-pressure accumulator, which inject fuel under high pressure into combustion chambers 26 of the internal combustion engine which are directly assigned to the injectors. Th...

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PUM

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Abstract

The invention relates to a high-pressure fuel pump (20) for a fuel system (10) for an internal combustion engine, having a pump housing (32) and having a fastening device (60) by which the pump housing (32) can be fastened at least indirectly to a mounting portion (56) of the internal combustion engine (10), and having an oscillation-decoupling means (70) which in the installed position is arranged in the load path between the pump housing (32) and the mounting portion (56). According to the invention, the fastening device (60) has a rigid intermediate portion (66) which in the installed position is connected flush to the mounting portion (56), wherein, in the installed position, at least regions of the oscillation-decoupling means (70) are arranged between the intermediate portion (66) and the mounting portion (56), and wherein the pump housing (32) is held in the oscillation-decoupling means (70).

Description

technical field [0001] The invention relates to a high-pressure fuel pump according to the preamble of claim 1 . Background technique [0002] High-pressure fuel pumps are known from the market as components of fuel systems for internal combustion engines. Usually such high-pressure fuel pumps are designed as cartridge pumps. The fuel is compressed in the delivery space via the stroke of the piston in the pump housing and delivered into a high-pressure accumulator (“Rail”). Solid noise and fluid noise (pressure surges) are generated in the high pressure fuel pump due to delivery and flow control in the flow control valve (MSV). [0003] Vibration excitation of the fuel pump therefore also occurs, in particular at the pump housing. In this case, the generated noise power is transferred via the fastening flange, which is relatively rigidly connected or coupled to the pump housing, to a mounting section of the internal combustion engine, for example to the cylinder head. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M39/00
CPCF02M59/48F02M39/00F02M2200/855F02M39/02
Inventor J·赫尔曼M·梅斯
Owner ROBERT BOSCH GMBH