EP2526595A1 - Bougie, systeme d'allumage, moteur et procede d'allumage pour le moteur - Google Patents
Bougie, systeme d'allumage, moteur et procede d'allumage pour le moteurInfo
- Publication number
- EP2526595A1 EP2526595A1 EP11704661A EP11704661A EP2526595A1 EP 2526595 A1 EP2526595 A1 EP 2526595A1 EP 11704661 A EP11704661 A EP 11704661A EP 11704661 A EP11704661 A EP 11704661A EP 2526595 A1 EP2526595 A1 EP 2526595A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tip
- resonator
- candle
- spark plug
- engine
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 12
- 239000012212 insulator Substances 0.000 claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 claims description 27
- 230000005284 excitation Effects 0.000 claims description 23
- 230000001939 inductive effect Effects 0.000 claims description 15
- 239000008246 gaseous mixture Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract description 4
- 238000010891 electric arc Methods 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/50—Sparking plugs having means for ionisation of gap
Definitions
- the invention relates to a spark plug for a confined gaseous medium present, for example, in a motor vehicle and, in particular, in an internal combustion engine disposed on the motor vehicle.
- the invention relates, according to a first of its aspects, a candle 1 illustrated in Figure 1 and adapted to ignite a confined gaseous medium, the candle 1 having a longitudinal axis AB and comprising:
- the electrode 5 ionizes the gaseous medium 2 when the series resonator 7 delivers an overvoltage V to the output terminal 72,
- the series resonator furthermore advantageously comprises: as an output terminal, a terminal merged with the tip electrode 6, and / or a ground terminal 71 electrically isolated from the supply terminal 70 and merged with the envelope external 3, a capacitor 74 arranged in series with the inductive coil 73 between the output terminal 72 and the ground terminal 71.
- a candle 1 is known to those skilled in the art as shown, for example, in French patent application FR 2,859,830. The latter describes an internal combustion engine comprising a cylinder head, a piston and a cylinder which form between them. a combustion chamber.
- the known spark plug 1 is actuated by excitation means which supply alternating current to the series resonator via the power supply terminal 70.
- the known spark plug 1 is used to ignite the confined gaseous medium which is contained in the combustion chamber.
- an outer envelope 3 (for example, formed by a sleeve) elongated along the axis AB and having an inlet 30 and an outlet end 31 axially opposite to each other, the outer casing 3 ensuring a function of fixing of the candle 1 in the gaseous medium 2 confined,
- the series resonator 7 has the more compact geometry.
- the distance between the inductive coil 73 and the tip 6 is reduced, which contributes, for the inductance given by the inductive coil 73, to reducing the capacitance 74 of the series resonator 7.
- the latter has an inversely proportional natural frequency F, for the inductance given by the inductive winding 73, to the square root of the capacitor 74. Consequently, the reduction of the capacitance 74 is reflected, for the given inductance of the winding.
- the ratio between the height H and the transverse dimension L of the tip 6 is between 4.5 and 5.5.
- the height H can be between about 5 mm and about 12 mm (5 mm ⁇ H ⁇ 12 mm); the transverse dimension L (diameter) can be between about 1 mm and about 5 mm (1 mm H H 5 5 mm).
- the connecting channel 95 can be arranged in the cylinder head 90, and at least the piston 91 is connected to the ground terminal 71.
- the spark plug 1 (and, therefore, the ignition system 10) can be mounted on the cylinder head 90 almost without encumbering the latter.
- This meets an industrial need for miniaturization of 9 engines to make them comply with anti-pollution standards more stringent. Binding the piston 91 to the ground terminal 71 makes it possible to orient the induced electric field E in a preferred manner, for example, along the longitudinal axis AB, directly in the combustion chamber 94, without calling upon any other specific electrical means (for example, without using any other specific electrode disposed at a distance from the tip 6).
- FIG. 5 illustrates an example of a voltage curve U between two electrodes, for example, between the tip 6 of the spark plug 1 and the piston 91. disposed at a distance ⁇ from each other in the gaseous medium 2 confined, for example, in an air-fuel mixture, as a function of current between these electrodes 6, 91 ( Figure 3).
- Said curve U presents:
- the threshold difference ⁇ between the tip 6 of the spark plug 1 and the piston 91 greater than 0.5 cm makes it possible to avoid, a priori, the spark plug 1 (and, consequently, the spark plug system 1). ignition 10 and, more generally, the motor 9) operate:
- the third discharge does not ensure the ignition of certain gaseous medium 2 confined especially when starting the engine 9 cold: the substantially monofilament nature, unbranched electric arc can heat a volume (middle gaseous 2 confined) sufficient to ignite cold said gaseous medium 2 confined.
- the unbranched monofilament arcing from the third discharge tends to ignite the gaseous medium 2 confined by non-volumetric manner but only in the immediate vicinity of the arc.
- the third discharge eventually leads to a certain erosion of the piston 91 by the electric arc (short circuit) which makes the motor 9 inoperative.
- This operating mode contributes to reliability of the ignition by the spark plug 1 according to the invention (and, consequently, by the ignition system 10 according to the invention) of the gaseous medium 2 confined (air-fuel mixture) in the combustion chamber 94 of the engine 9 regardless of the operating mode of the latter and, in particular, during a cold start of said engine 9 .
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1050434A FR2955710B1 (fr) | 2010-01-22 | 2010-01-22 | Bougie, systeme d'allumage, moteur et procede d'allumage pour le moteur. |
| PCT/FR2011/050103 WO2011089360A1 (fr) | 2010-01-22 | 2011-01-20 | Bougie, systeme d'allumage, moteur et procede d'allumage pour le moteur |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2526595A1 true EP2526595A1 (fr) | 2012-11-28 |
| EP2526595B1 EP2526595B1 (fr) | 2015-03-11 |
Family
ID=43062723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11704661.5A Not-in-force EP2526595B1 (fr) | 2010-01-22 | 2011-01-20 | Bougie, systeme d'allumage, moteur et procede d'allumage pour le moteur |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2526595B1 (fr) |
| CN (1) | CN102804527B (fr) |
| FR (1) | FR2955710B1 (fr) |
| WO (1) | WO2011089360A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3000142B1 (fr) * | 2012-12-26 | 2018-01-26 | Renault S.A.S | Procede de gestion d'un moteur ajustant la tension de fonctionnement d'une bougie d'allumage radiofrequence |
| KR20160097354A (ko) | 2013-12-12 | 2016-08-17 | 페더럴-모굴 이그니션 컴퍼니 | 코로나 점화 시스템에서 공진 주파수 검출을 위한 방법 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5555862A (en) * | 1994-07-19 | 1996-09-17 | Cummins Engine Company, Inc. | Spark plug including magnetic field producing means for generating a variable length arc |
| US6321733B1 (en) * | 1996-05-29 | 2001-11-27 | Knite, Inc. | Traveling spark ignition system and ignitor therefor |
| US6035838A (en) * | 1998-04-20 | 2000-03-14 | Cummins Engine Company, Inc. | Controlled energy ignition system for an internal combustion engine |
| FR2859830B1 (fr) * | 2003-09-12 | 2014-02-21 | Renault Sas | Bougie de generation de plasma a inductance integree. |
| FR2893455B1 (fr) * | 2005-11-14 | 2007-12-14 | Renault Sas | Bougie d'allumage pour moteur a combustion interne |
| EP2093416B1 (fr) * | 2006-05-18 | 2013-09-04 | North-West University | Système d'ignition |
| FR2914530B1 (fr) * | 2007-03-28 | 2014-06-20 | Renault Sas | Pilotage optimal a la frequence de resonance d'un resonateur d'un allumage radiofrequence. |
-
2010
- 2010-01-22 FR FR1050434A patent/FR2955710B1/fr not_active Expired - Fee Related
-
2011
- 2011-01-20 CN CN201180014219.1A patent/CN102804527B/zh not_active Expired - Fee Related
- 2011-01-20 WO PCT/FR2011/050103 patent/WO2011089360A1/fr not_active Ceased
- 2011-01-20 EP EP11704661.5A patent/EP2526595B1/fr not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011089360A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2955710B1 (fr) | 2012-01-13 |
| CN102804527B (zh) | 2014-01-22 |
| EP2526595B1 (fr) | 2015-03-11 |
| CN102804527A (zh) | 2012-11-28 |
| WO2011089360A1 (fr) | 2011-07-28 |
| FR2955710A1 (fr) | 2011-07-29 |
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