Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fuel injector

A fuel injector and fuel injection technology, applied in the direction of fuel injection device, special fuel injection device, charging system, etc., can solve the problems of reducing control pressure, delayed response characteristics, etc., achieving freedom of recovery, reducing control volume, reducing The effect of manufacturing costs and coordination costs

Inactive Publication Date: 2013-07-24
ROBERT BOSCH GMBH
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, said indirect control has proven to be flawed because the amount of control required to reduce the control pressure results in recovery and must thereafter be returned to high pressure
Furthermore, the indirect control of the injection valve member has a delayed response characteristic compared to the principle condition of the direct control

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fuel injector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The illustrated fuel injector according to the invention has an electromagnetic actuator 1 for actuating an injection valve component 2 . The injection valve member 2 causes reciprocating opening and closing of at least the injection opening 3 in the nozzle body 13 . For actuating the injection valve member 2, the electromagnetic actuator 1 has a likewise reciprocating armature element 4 with a hydraulic working surface A for controlling the volume 5 in the axial direction 3 Boundary. When the electromagnetic actuator 1 is switched on, the armature element 4 moves in the direction of the actuator and in this way causes a pressure drop in the control volume 5 . Because the control volume 5 is also composed of the hydraulic working surface A constructed on the hydraulic converter 6 1 and the hydraulic face A formed on the injection valve component 2 2 The limit realizes the hydraulic coupling between the control volume 5 and the armature element 4 . This means that hy...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, comprising a magnetic actuator (1) for directly controlling a preferably needle-shaped injection valve member (2), by means of the stroke movement of which at least one injection opening (3) of the fuel injector can be released or closed. The magnetic actuator (1) comprises an armature element (4) that can carry out a stroke movement in order to control the control pressure in a control volume (5). According to the invention, the injection valve member (2) can be mechanically coupled to a hydraulic intensifier (6) during a first phase of the injection valve member opening stroke, said intensifier having a hydraulic active surface A1 which delimits the control volume (5) and which together with a hydraulic active surface A2 that is formed on the injection valve member (2) is larger than a hydraulic active surface A3 that is formed on the armature element (4) and delimits the control volume (5) so that a force amplification is caused on the basis of the surface area ratio of the hydraulic active surfaces A1, A2, and A3 that are relevant to the control volume (5). Furthermore, according to the invention the injection valve member (2) can be mechanically coupled to the armature element (4) during the injection valve member closing stroke, the pressing force of an armature spring (7) being applied to said armature element in the closing direction of the injection valve member (2) such that the closing stroke of the injection valve member (2) can be caused by means of the armature spring (7).

Description

technical field [0001] The invention relates to a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine, having the features stated in the preamble of claim 1 . The fuel injector includes an electromagnetic actuator for directly actuating a preferably needle-shaped injection valve member, by reciprocating the injection valve member at least one injection opening of the fuel injection valve can be opened or closed. Background technique [0002] The injection valve components of fuel injectors are usually controlled indirectly using electromagnetic actuators as actuating devices. To this end, the electromagnetic actuator comprises a solenoid valve, by means of which the control force applied to the injection valve member can be varied in the control space, so that a change in the control pressure causes the injection valve member to open or closure. However, this indirect control has proven to be flawed, since the amount of control requi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02M51/06F02M63/00
CPCF02M51/066F02M2200/703F02M51/0635
Inventor A·许尔克O·奥尔哈费尔
Owner ROBERT BOSCH GMBH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com