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Fuel injector

A fuel injector and fuel injection technology, applied in the direction of fuel injection devices, special fuel injection devices, charging systems, etc., to achieve the effect of low-cost manufacturing

Inactive Publication Date: 2012-11-21
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This makes it possible to reduce the force exerted by the armature on the injection valve element

Method used

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  • Fuel injector
  • Fuel injector
  • Fuel injector

Examples

Experimental program
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Embodiment Construction

[0024] The same components or components with the same function have the same reference numerals in the figures.

[0025] figure 1 A fuel injector 10 designed as a common rail injector is shown schematically for injecting fuel into a combustion chamber 11 of a not shown internal combustion engine. The fuel injector 10 has a high-pressure connection 12 to which a supply line 13 is connected. In addition to other fuel injectors not shown, fuel injector 10 is supplied via supply line 13 with high pressure (rail pressure) at eg more than 2000 bar from high pressure accumulator 15 (rail) down the fuel. The high-pressure accumulator 15 is again supplied with fuel from a storage container 16 (tank) by means of a high-pressure pump 17 , which is preferably designed as a radial piston pump. The high-pressure connection 12 opens into a first pressure chamber 18 which is filled with fuel which is substantially at rail pressure.

[0026] The first pressure chamber 18 is formed in a ho...

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PUM

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Abstract

The invention relates to a fuel injector (10), in particular a common rail injector, for injecting fuel into a combustion chamber (11) of an internal combustion engine, having an injection valve element (27) that can be displaced between a closed position and an open position opening a nozzle hole arrangement (25), it being possible for the injection valve element (27) to be driven by a magnetic armature assembly (49; 18) via a coupling chamber (70) filled with a pressurized medium. According to the invention, provision is made for the magnetic armature assembly (49; 80) to have at least two magnetic armatures (55, 55a, 55b, 56, 56a, 56b, 81, 86, 92, 94, 95, 97, 101, 108, 108a) which can be moved relative to one another and the end faces (65, 65c, 66, 66c) of which project into the coupling chamber (70).

Description

technical field [0001] The invention relates to a fuel injector according to the preamble of claim 1 . Background technique [0002] Such a fuel injector is known from the later published DE 10 2008 042 227 A1 of the applicant. Known fuel injectors are used to inject fuel into a combustion chamber of an internal combustion engine and have a pin-shaped injection valve element which is arranged in operative connection with an armature via a coupling chamber. The coupling chamber serves here as a force converter which converts the movement of the armature into a movement of the injection valve element in order thereby to open or close the injection opening on the fuel injector housing. The armature is coupled to the injection valve element via the coupling chamber, since the energy density or force of the armature is not sufficient to lift the injection valve element from its sealing surface in a direct mechanical coupling to the injection valve element. Although the opening ...

Claims

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Application Information

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IPC IPC(8): F02M51/06F02M63/00F02M61/04F02M63/02
CPCF02M61/042F02M51/066F02M2200/703F02M63/0225
Inventor O.赖因M.拜尔R.埃特伦德
Owner ROBERT BOSCH GMBH