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Fuel injection valve having a dry magnetic actuator

A technology of fuel injection valves and electromagnetic actuators, applied in fuel injection devices, special fuel injection devices, charging systems, etc., can solve problems such as dynamic loss, and achieve the effects of simple cost, small position tolerance, and low-cost structure

Inactive Publication Date: 2013-04-03
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the corrosion problems caused by the fuel, especially in the area of ​​the actuator, there are dynamic losses here due to the fuel intrusion required for the adjustment process

Method used

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  • Fuel injection valve having a dry magnetic actuator

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Embodiment Construction

[0013] Refer below figure 1 A fuel injection valve 1 according to a preferred embodiment of the present invention will be described in detail.

[0014] The fuel injection valve 1 is an outwardly opening valve, wherein figure 1 Shows the closed state of the valve. The fuel injector 1 according to the invention is used, for example, for high-pressure direct injection of an internal combustion engine in stratified charge operation.

[0015] as by figure 1 It can be seen that the fuel injector 1 comprises a valve body 2 in which a fuel line 3 is formed for feeding fuel under high pressure. At one end of the valve body 2 is formed a perforation 6 which can be released or closed by means of an outwardly opening valve needle 4 . The valve needle 4 here closes the perforation 6 on the valve seat 5 .

[0016] At an end facing away from the valve seat 5 , the valve needle 4 includes a disk-shaped element 15 against which a closing spring 11 rests. The closing spring 11 is supporte...

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PUM

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Abstract

The invention relates to a fuel injection valve, comprising: a valve body (2) in which a fuel path (3) runs, a valve needle (4) opening to the outside and exposing and closing off an aperture (6) at a valve seat (5), a magnetic actuator (7) having an armature (8), a closing spring (11) returning the valve needle (4) to a closed valve state, a sealing element (13) separating the magnetic actuator (7) from the fuel path (3), so that the magnetic actuator (7) is disposed in a region (17) of the valve body (2) that is free of fuel, and a counterspring (12) contacting the armature (8) and pretensioning same, wherein the armature (8) and the valve needle (4) are separate components that are immediately adjacent to each other at a separation point (14) and contact each other. The counterspring (12) pretensions the armature (8) against the valve needle (4), and a force (F1) of the closing spring (11) acts against a force (F2) of the counterspring (12), wherein the force (F1) of the closing spring (11) is greater than the force (F2) of the counterspring (12).

Description

technical field [0001] The invention relates to a fuel injection valve with a dry electromagnetic actuator and a leak-free circuit. Background technique [0002] Fuel injectors are known from the prior art in various designs. For example, outwardly opening injection valves, which are actuated by means of piezoelectric actuators, are increasingly being used recently. While this enables fast switching times, it is very expensive and laborious to manufacture. An injection valve is also known from US 2007 / 0095955 A1, which discloses the arrangement of an electromagnetic actuator in the fuel path. In addition to corrosion problems caused by the fuel, in particular in the region of the actuator, there are dynamic losses due to the injection of fuel required for the control process. It is therefore desirable to provide a valve for fuel injection that is constructed as simply as possible or is inexpensive and that switches quickly. Contents of the invention [0003] The fuel i...

Claims

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Application Information

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IPC IPC(8): F02M51/06F02M61/08
CPCF02M2200/16F02M61/08F02M51/0635
Inventor U·迪尔R·韦尔特R·恩格尔贝格
Owner ROBERT BOSCH GMBH