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Fuel injector with electromagnetic actuation of the plunger

一种燃料喷射器、电磁激励器的技术，应用在燃料喷射装置、装料系统、机器/发动机等方向，能够解决浪费能量、加热燃料、复杂生产成本等问题

Active Publication Date: 2006-05-24
FAB ITAL MAGNETI MARELLI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since such injectors need to provide hydraulic circuits with piezoelectric or electromagnetic actuated control valves, they are complex and expensive to produce
Furthermore, in injectors with hydraulic actuation of the plunger, there is always some degree of backflow of fuel, which is vented at ambient pressure; this backflow of fuel has two negative effects, being that it wastes energy and has a tendency to heat the fuel

Method used

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  • Fuel injector with electromagnetic actuation of the plunger
  • Fuel injector with electromagnetic actuation of the plunger
  • Fuel injector with electromagnetic actuation of the plunger

Examples

Experimental program
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Embodiment Construction

[0014] In Figure 1, 1 denotes the entire fuel injector, which is substantially cylindrically symmetrical about a longitudinal axis 2 and which can be controlled so that fuel is injected directly into the combustion chamber (explosion chamber) of the cylinder from the opened injection port 3 (not shown). show). The injector 1 comprises a support body 4 having a tubular cylindrical shape of variable cross-section along the longitudinal axis 2 and having a supply channel 5 extending along the entire length of said support body 4 in order to supply pressurized fuel to to jet port 3. The support body 4 horizontally accommodates an electromagnetic actuator 6 in its upper part and an injection valve 7 (shown in FIG. 2 ) in its lower part; flow, the injection nozzle 3 is generated at the level of the injection valve 7 .

[0015] As shown in Figure 3, the electromagnetic actuator 6 comprises a pair of electromagnets 8 (upper and lower, respectively), each of which, when energized, is...

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PUM

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Abstract

A fuel injector (1) provided with: an injection nozzle (3), an injection valve (7) having a movable plunger (17) for regulating the fuel flow through the injection nozzle (3); and an electromagnetic An actuator (6) capable of moving the plunger (17) between a closed position and an open position of the injection valve (7) and having a pair of electromagnets (8), each said electromagnet (8) having a coil ( 11), fixed magnetic armature (12) and movable armature (9); two annular grooves (15) are generated on the outer surface of the tubular support (4) of the injector (1), each of which is wound There is a corresponding coil (11) for the electromagnet (8).

Description

technical field [0001] The present invention relates to a fuel injector with electromagnetic actuation of a plunger. Background technique [0002] Electromagnetic fuel injectors generally comprise a tubular support body with a central passage which performs the function of a fuel conduit and terminates in an injection orifice regulated by an injection valve controlled by an electromagnetic actuator. The injection valve is provided with a plunger rigidly connected to a movable armature of an electromagnetic actuator so as to be activated by action of the electromagnetic actuator against a spring acting between a closed position and an open position of the injection nozzle. Moved, the spring tends to hold the plunger in the closed position. [0003] An example of a solenoid fuel injector of the type described above is given in US Patent 6027050-A1 which relates to a fuel injector provided with a plunger cooperating with a valve seat at one end and a solenoid at the opposite e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M51/06
CPCF02M61/166F02M61/18F02M61/188
Inventor 法比奥·切尔诺亚卢卡·卡尼奥拉蒂马西莫·马蒂奥利
Owner FAB ITAL MAGNETI MARELLI SPA