SE1851287A1 - Fuel injector - Google Patents

Fuel injector

Info

Publication number
SE1851287A1
SE1851287A1 SE1851287A SE1851287A SE1851287A1 SE 1851287 A1 SE1851287 A1 SE 1851287A1 SE 1851287 A SE1851287 A SE 1851287A SE 1851287 A SE1851287 A SE 1851287A SE 1851287 A1 SE1851287 A1 SE 1851287A1
Authority
SE
Sweden
Prior art keywords
needle
cavity
control
outlet
nozzle
Prior art date
Application number
SE1851287A
Inventor
Fredrik Wåhlin
Original Assignee
Scania Cv Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1851287A priority Critical patent/SE1851287A1/en
Publication of SE1851287A1 publication Critical patent/SE1851287A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/008—Means for influencing the flow rate out of or into a control chamber, e.g. depending on the position of the needle

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present disclosure relates to a fuel injector (11) for supplying fuel into a combustion chamber of an internal combustion engine (2), wherein the fuel injector comprises:- a nozzle (13) comprising nozzle openings (23) and a seat portion (25) adjacent to the nozzle openings;- a needle (17) arranged within the nozzle, wherein the needle is arranged to be slidably movable between a first position wherein a tip end (31) of the needle abuts the seat portion of the nozzle and a second position wherein the tip end of the needle is retracted from the seat portion; and- a control chamber (33) arranged at a second end (35) of the needle opposite the tip end of the needle, the control chamber comprising a control cavity (39), a cavity inlet (41) and a cavity outlet, wherein the control chamber is arranged to control movement of the needle between the first position and the second position by controlling a fuel flow out of the control cavity through the cavity outlet relative to a fuel flow into the control chamber through the cavity inlet;wherein the cavity outlet comprises an outlet channel (43) arranged adjacent to the control cavity and longitudinally substantially parallel to the direction of movement of the needle, wherein the outlet channel is arranged in fluid connection with the control cavity via an outlet interfacial area (A) between the outlet channel and the control cavity, and wherein the outlet interfacial area is arranged to be successively blocked by the needle upon movement of the needle from the first position to the second position.
SE1851287A 2018-10-19 2018-10-19 Fuel injector SE1851287A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE1851287A SE1851287A1 (en) 2018-10-19 2018-10-19 Fuel injector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1851287A SE1851287A1 (en) 2018-10-19 2018-10-19 Fuel injector

Publications (1)

Publication Number Publication Date
SE1851287A1 true SE1851287A1 (en) 2019-10-18

Family

ID=68463249

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1851287A SE1851287A1 (en) 2018-10-19 2018-10-19 Fuel injector

Country Status (1)

Country Link
SE (1) SE1851287A1 (en)

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Legal Events

Date Code Title Description
NAV Patent application has lapsed