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Fuel Injector

A fuel injector and injector technology, which is applied to fuel injection devices, special fuel injection devices, charging systems, etc., can solve the problems of slow closing transients and slow opening transients.

Active Publication Date: 2016-01-27
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too much damping results in slower turn-on transients and slower turn-off transients, which is not desirable

Method used

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  • Fuel Injector
  • Fuel Injector
  • Fuel Injector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 An injector 100 for injecting fuel into a combustion engine according to a first exemplary embodiment is shown in longitudinal section.

[0030]Injector 100 has a longitudinal axis 105, a nozzle end 110, and an opposing supply end 115, sometimes referred to as a fuel inlet end and a fuel outlet end, respectively. The injector 100 includes a valve 120 and an actuator 125 for operating the valve 120 . Actuator 125 is an electromagnetic actuator powered through connector 130 . When power is supplied to connector 130 , fuel flows from supply end 115 through valve 120 and is injected from injector 100 at nozzle end 110 .

[0031] In the illustrated embodiment, valve 120 includes a valve needle 135 movable along axis 105 between an open position 140 in which valve 120 is open and a closed position 145 in which no fuel may pass through valve 120 . The valve needle 135 is accommodated in the cavity of the valve body 122 and is axially displaceable in a reciprocating...

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PUM

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Abstract

A fuel injector (100) is disclosed. It comprises a valve (120) with a needle (135) that is movable along a longitudinal axis (105) between an open position (140) and a closed position (145), for opening or closing the valve (120); an actuator (125) which comprises an armature (155) and a pole piece (250), the armature (155) is axially movable and operable to interact mechanically with the needle (135), so that the needle (135) is moved towards the open position (140) by a movement of the armature (155) in axial direction towards the pole piece (250); and a first spring (220) for biasing the armature (155) in axial direction away from the pole piece (250). The first spring (220) is configured and operable to stop said movement of the armature (155) by means of its spring force when the needle (135) is in the open position (140).

Description

technical field [0001] The present invention relates to fuel injectors. More particularly, it relates to a fuel injector for use with a combustion engine in a motor vehicle. Background technique [0002] A fuel injector for injecting fuel into a combustion engine includes a valve that can be opened against a spring force by an electrically driven actuator. Different designs are known in the art including electromagnetic or piezoelectric actuators, digital or servo modes and actuators for different fuel types such as gasoline or diesel. [0003] US 2006 / 0255185 A1 shows a fuel injector with an electromagnetic actuator, wherein the valve comprises a valve needle and the valve opens when the valve needle moves in the direction of the nozzle of the injector. [0004] The amount of fuel that passes through the injector generally depends on when the actuator is driven. A flow curve showing the relationship between drive time and throughput generally has three consecutive region...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M61/10F02M51/06
CPCF02M51/0671F02M51/0664F02M51/0685F02M2200/304F02M2200/306F02M61/20F02M51/0614F02M41/00F02M61/10
Inventor I.伊佐M.梅基
Owner VTESCO TECH GMBH
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