Fuel injection system

A fuel injection system and fuel technology, applied in the direction of fuel injection pumps, fuel injection devices, charging systems, etc., can solve the problems of damage to the fuel injection system, the inability to ensure the correct amount of fuel, etc., and achieve the effect of saving costs

Inactive Publication Date: 2018-08-21
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Filling losses occur in the high-pressure fuel pump due to these fluctuations, with the result that, for example, the correct dosing of the fuel quantity required by the fuel injection system in the combustion chamber cannot be ensured
Pressure fluctuations, also known as pressure pulsations, also cause vibrations in components of the high-pressure fuel pump as well as components of the low-pressure system, such as supply lines, and this can lead to undesired noise or, in the worst case, even damage to the fuel injection system various parts of

Method used

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Examples

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Embodiment Construction

[0035] figure 1 A schematic diagram of a fuel injection system 10 is shown, with which high pressure fuel 12 is supplied to combustion chambers in an internal combustion engine. For this purpose, the fuel injection system has a fuel tank 14, a pre-delivery pump 16, a high-pressure fuel pump 18 and a pressure accumulator 20 called a rail, on which is arranged an injector 22 for each combustion chamber of the internal combustion engine to be supplied .

[0036] The fuel 12 is delivered by the pre-delivery pump 16 at a predetermined supply pressure PZ from the fuel tank 14 to the high-pressure fuel pump 18, wherein the fuel 12 is compressed to a predetermined high pressure in the pressure chamber 26 by the translational movement of the pump piston 24 and then delivered to accumulator 20.

[0037] In order to allow the fuel 12 to enter the pressure chamber 26 of the high-pressure fuel pump 18 , an inlet valve 28 is provided, which in the present embodiment is configured as an ac...

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PUM

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Abstract

The invention relates to a fuel injection system (10) having a high-pressure fuel pump (18) which has an intake valve (28), wherein a non-return valve (42) is arranged upstream of the intake valve (28) in the direction of flow of a fuel (12) in the fuel injection system (10), which blocks the return flow of a fuel volume, which has not been conveyed by the high-pressure fuel pump (18) into a high-pressure region (36), into a low-pressure system (32) of the fuel injection system (10).

Description

technical field [0001] The invention relates to a fuel injection system for injecting fuel into at least one combustion chamber of an internal combustion engine, the fuel injection system having a high-pressure fuel pump. Background technique [0002] A high pressure fuel pump in such fuel injection systems is used to apply high pressure to the fuel, where the pressure may be in the range of 150 bar to 400 bar in gasoline internal combustion engines, and 1500 bar to 2500 bar in diesel internal combustion engines, for example. The higher the pressure that can be generated in the corresponding fuel, the lower the emissions generated during the combustion of the fuel in the combustion chamber, which is particularly advantageous in the context of the desire to reduce emissions to a greater extent. [0003] In order to make it possible to achieve high pressures in the respective fuel, high-pressure fuel pumps are typically designed as piston pumps, wherein a piston performs a tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M55/02F02M55/04F02M37/00F02M63/02
CPCF02M37/0023F02M55/025F02M55/04F02M63/0225F02M37/0041F02M59/466F02M63/0265
Inventor Y.库尔特H.扎比希T.富克斯
Owner CONTINENTAL AUTOMOTIVE GMBH
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