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High-pressure fuel pump for fuel injection system

A technology of fuel injection system and high-pressure fuel pump, which is applied in the directions of fuel injection pump, fuel injection device, special fuel injection device, etc., can solve the problems of small structure space and the like

Inactive Publication Date: 2019-10-22
CPT GRP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in addition to the largest possible volumetric capacity, there is a further requirement for low-pressure dampers that occupy the smallest possible construction space

Method used

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  • High-pressure fuel pump for fuel injection system
  • High-pressure fuel pump for fuel injection system
  • High-pressure fuel pump for fuel injection system

Examples

Experimental program
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Embodiment Construction

[0029] figure 1 is a longitudinal sectional view of a high-pressure fuel pump 10 that can be used to apply high pressure to fuel 12 . The high-pressure fuel pump 10 has a housing 14 with a housing bore 16 . The housing bore 16 forms a pressure chamber 20 at the first end region 18 within which during operation a high pressure is applied to the fuel 12 by the periodic contraction and expansion of the volume of the pressure chamber 20 . The housing bore 16 also forms a leakage chamber 24 at the second end region 22 .

[0030] The high-pressure fuel pump 10 has a pump piston 26 guided in a housing bore 16 . For this purpose, the housing bore 16 has a special pump piston guide area 28 which is formed by the pump piston guide section 30 on the housing 14 and protrudes into the leakage chamber 24 . In operation, the pump piston 26 translates back and forth along the axis of movement 32 between the pressure chamber 20 and the leakage chamber 24 . Due to this movement of the pump ...

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PUM

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Abstract

The invention relates to a high-pressure fuel pump (10) having a pump piston (26), during operation, the pump piston (26) translates between the pressure chamber (20) and the leakage chamber (24). Wherein the leakage chamber (24) has a leakage collecting region (34) and a balancing region (40), the low-pressure damper (42) is formed as an annular piston damper (44) having an annular piston (46), and the annular bushing (48) is arranged in the balancing region (40), the piston (46) being guided in an axially movable manner in the bushing (48).

Description

technical field [0001] The present invention relates to a high pressure fuel pump for applying high pressure to fuel in a fuel injection system. Background technique [0002] High pressure fuel pumps of this type are used in fuel injection systems in order to compress fuel and thus apply high pressure to the fuel. The fuel at high pressure is then injected into the combustion chamber of the internal combustion engine by means of a fuel injection device. In the case of gasoline internal combustion engines the pressure is in the range from 150 bar to 400 bar and in the case of diesel internal combustion engines the pressure is in the range from 1500 bar to 3000 bar. The more the fuel is compressed, the fewer emissions are produced during the combustion process. This is advantageous in particular in terms of reducing emissions, which is increasingly popular and required by law. [0003] These high-pressure fuel pumps are usually designed as piston pumps, which compress the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/04F02M59/44F02M59/02
CPCF02M55/04F02M59/02F02M59/44F02M59/102F02M2200/315F02M59/025F02M61/20F02M2200/16F02M57/023F02M59/442F02M63/0003F02M63/024F02M2200/40F04B11/0091
Inventor Y.米哈伊洛夫T.福克斯
Owner CPT GRP GMBH