EP1837516A1 - Actionneur pour soupape à combustible - Google Patents

Actionneur pour soupape à combustible Download PDF

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Publication number
EP1837516A1
EP1837516A1 EP06270035A EP06270035A EP1837516A1 EP 1837516 A1 EP1837516 A1 EP 1837516A1 EP 06270035 A EP06270035 A EP 06270035A EP 06270035 A EP06270035 A EP 06270035A EP 1837516 A1 EP1837516 A1 EP 1837516A1
Authority
EP
European Patent Office
Prior art keywords
armature
force
valve
electromagnet
configuration
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP06270035A
Other languages
German (de)
English (en)
Inventor
Philippe-Said Farah
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP06270035A priority Critical patent/EP1837516A1/fr
Publication of EP1837516A1 publication Critical patent/EP1837516A1/fr
Withdrawn legal-status Critical Current

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0689—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means and permanent magnets
    • F02M51/0692—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means and permanent magnets as valve or armature return means

Definitions

  • the present invention relates to a fuel value actuator, particularly, but not exclusively a fuel value actuator for use in direct injection automobile engines.
  • the fuel injection valves of automobile engines must open and close very quickly and reliably in order to ensure efficient engine operation.
  • the rapid opening and closing of such valves is normally performed using a solenoid connected to the valve.
  • the solenoid typically has an electromagnetic coil which may be successively energised and de-energised against the action of a return spring in order to cause an armature (and hence the valve) to move up and down in an opening / closing operation.
  • a spring is provided. When the electromagnetic coil is de-energised the force exerted by the spring causes the valve to return to the closed position.
  • a disadvantage of such systems is that the time taken for the valve to respond to each opening / closing signal (provided by the Engine Control Module) is often longer than desired. This is due to the amount of time required for the electromagnetic coil to build up the magnetic force required to overcome the force of the return spring.
  • a fuel valve actuator comprising:-
  • a method of actuating a fuel valve comprising:-
  • a prior art fuel injector actuator 10 comprises a body 12 which houses an electromagnet coil 14 surrounding an armature 16.
  • the armature 16 is connected to the value (typically the value pintle) such that when it moves the valve may be moved between an open and closed configuration.
  • a return spring (not shown) also acts on the armature 16 in order to provide a force Fs which keeps the valve in the closed position when the electromagnet 14 is not energised.
  • the electromagnet is energised (an electrical current is passed through it). This creates flux lines F1 as shown in Fig. 1 which collectively produce a magnetic force on the armature 16 in the direction Fm.
  • the electromagnetic coil 14 As the electromagnetic coil 14 is energised it takes time for the magnetic force Fm to build up to a level which is capable of overcoming the return spring force Fs. Once the force from the electromagnetic coil 14 is greater than the spring force Fs, the valve opens. Up to this point, the valve remains closed and there is therefore a time delay from the moment the valve opening signal reaches the valve and the moment the valve opens. This is undesirable since it introduces a time-delay into a crucial phase of the injection sequence.
  • Fuel value actuator 20 comprises a body 22 which houses an electromagnet 24 surrounding an armature 26.
  • a permanent magnet 28 is also provided which exerts a magnetic force Fpm that keeps the valve in the closed position when the electromagnet 24 is not energised.
  • the permanent magnet 28 may have a magnetic flux density of around 1.2T.
  • Resilient biasing means such as a spring (not shown) also acts on the armature 16. In contrast with the prior art fuel injector 10, this spring provides a force Fs which tends to open the valve.
  • the spring typically provides a force of around 25 Newton, although this may be adjustable.
  • the force of the permanent magnet 28 Fpm acts against the force of the spring Fs.
  • the permanent magnet should be chosen during manufacture to provide a force Fpm which is slightly greater than the force of the spring Fs in order to keep the valve in the closed position when the electromagnet is not energised.
  • the magnetic force provided by the permanent magnet is depicted by flux lines F2 in Fig. 2A. These flux lines clearly pass through (and hence act upon) the armature 26.
  • the electromagnet 24 When the fuel valve is to be opened, the electromagnet 24 is energised in response to a control signal.
  • the electromagnet 24 is energised with a current which provides around 650 AT for a coil of around 42 turns. This quickly creates flux lines which interfere with the flux lines F2 in order to arrive at the flux pattern depicted by flux lines F3 in Fig. 2B.
  • the flux lines are created faster than in prior art systems due to the saturated magnetic field provided by the permanent magnet 28 which, upon application of a positive voltage to the electromagnet, allows current to build up quickly.
  • the built up current creates a magnetic field opposed to the original one created by the permanent magnet.
  • flux lines F3 do not pass through the armature 26 and therefore do not act thereupon.
  • the air gap between the electromagnet 24 and the armature 26 may be manipulated in order to achieve the desired magnetic force.
  • this air gap may typically be in the region of between 50 m and 100 m; however, other clearances could be used.
  • the above actuator does not suffer from the time delay between the moment the control signal arrives at the fuel actuator the moment and the valve opens. This is in part due to there being no build up of force required by the electromagnet to move the actuator since the actuator is actually moved by the spring force Fs.
  • the current in the electromagnet 24 can either be stopped (in which case the force of the permanent magnet 28 will close the valve) or can preferably, be re-versed in direction (in which case the armature will be positively urged toward the closed configuration by both the resulting magnetic field from the electromagnet and the closing force provided by the permanent magnet).

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Magnetically Actuated Valves (AREA)
EP06270035A 2006-03-23 2006-03-23 Actionneur pour soupape à combustible Withdrawn EP1837516A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06270035A EP1837516A1 (fr) 2006-03-23 2006-03-23 Actionneur pour soupape à combustible

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06270035A EP1837516A1 (fr) 2006-03-23 2006-03-23 Actionneur pour soupape à combustible

Publications (1)

Publication Number Publication Date
EP1837516A1 true EP1837516A1 (fr) 2007-09-26

Family

ID=36743032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06270035A Withdrawn EP1837516A1 (fr) 2006-03-23 2006-03-23 Actionneur pour soupape à combustible

Country Status (1)

Country Link
EP (1) EP1837516A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011058344A1 (fr) 2009-11-10 2011-05-19 Sentec Ltd Actionneur à électroaimant
CN103119282A (zh) * 2010-09-30 2013-05-22 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
CN103764995A (zh) * 2011-09-09 2014-04-30 大陆汽车有限公司 阀组件和喷射阀
WO2014146800A1 (fr) * 2013-03-19 2014-09-25 Robert Bosch Gmbh Dispositif de réglage électromagnétique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332822A1 (de) * 1983-09-12 1985-03-28 Robert Bosch Gmbh, 7000 Stuttgart Magnetventil mit unelastischer ventildichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3332822A1 (de) * 1983-09-12 1985-03-28 Robert Bosch Gmbh, 7000 Stuttgart Magnetventil mit unelastischer ventildichtung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011058344A1 (fr) 2009-11-10 2011-05-19 Sentec Ltd Actionneur à électroaimant
EP2822004A1 (fr) 2009-11-10 2015-01-07 Sentec Ltd Actionneur à électroaimant
US9530551B2 (en) 2009-11-10 2016-12-27 Sentec Ltd Solenoid actuator
CN103119282A (zh) * 2010-09-30 2013-05-22 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
CN103119282B (zh) * 2010-09-30 2015-04-22 大陆汽车有限公司 用于喷射阀的阀组件和喷射阀
US9376994B2 (en) 2010-09-30 2016-06-28 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
CN103764995A (zh) * 2011-09-09 2014-04-30 大陆汽车有限公司 阀组件和喷射阀
WO2014146800A1 (fr) * 2013-03-19 2014-09-25 Robert Bosch Gmbh Dispositif de réglage électromagnétique

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