WO2007066031A1 - Procede et dispositif de diagnostic d'une bobine d'allumage d'un moteur a combustion interne - Google Patents
Procede et dispositif de diagnostic d'une bobine d'allumage d'un moteur a combustion interne Download PDFInfo
- Publication number
- WO2007066031A1 WO2007066031A1 PCT/FR2006/051265 FR2006051265W WO2007066031A1 WO 2007066031 A1 WO2007066031 A1 WO 2007066031A1 FR 2006051265 W FR2006051265 W FR 2006051265W WO 2007066031 A1 WO2007066031 A1 WO 2007066031A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spark plug
- spark
- coil
- ignition coil
- engine
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
-
- 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
- H01T13/58—Testing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
-
- 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
- H01T13/02—Details
- H01T13/04—Means providing electrical connection to sparking plugs
Definitions
- the present invention relates to a device for diagnosing an organ making up internal combustion engines. It relates more particularly to the detection of a malfunction of an ignition coil of such an engine.
- the mechanic can only carry out the ignition coil operation tests when the vehicle is stopped.
- the ignition voltage requirements are lower when stopped than when accelerating at full load of the engine. It is possible that a coil provides sufficient voltage when stopped but that for certain operating points it is defective. This deficiency cannot be detected by the operator if he implements the method described above.
- a "diagnostic suitcase" composed of a portable computer connecting to and interacting with the engine computers has also been proposed.
- the present invention proposes to remedy the drawbacks of the prior art, by providing a method and a device for diagnosing the operating state of the ignition coil, inexpensive, particularly simple to implement and independent of the level. operator experience.
- Another object of the present invention is to provide a method and a device for its implementation, making it possible to test the operation of the coil for all of its operating points, without damaging the coil or the ignition circuit.
- the invention provides a method for diagnosing the operation of an ignition coil of an internal combustion engine, further comprising at least one electrical cable connecting the ignition coil to at least one spark plug located in an engine cylinder head, characterized in that the method comprises at least the steps consisting in:
- - have the coil supply a so-called diagnostic voltage, greater than a threshold value necessary for the formation of a spark by the spark plug
- - have the coil supply a so-called diagnostic voltage, greater than a threshold value necessary for the formation of a spark by the spark plug, so as to cause the formation of a spark, between the electrode center of the spark plug and a conducting element of the switch and
- the verification step consists of noting engine combustion misfires.
- the step of verifying the formation of a spark consists in visualizing an image of the current passing through the switch.
- the verification step consists of visualizing a spark produced within the switch.
- the invention also provides a device for diagnosing the operation of an ignition coil of an internal combustion engine, further comprising at least one electrical cable connecting the coil to at least one spark plug located in the cylinder head of the engine characterized in that said device comprises a conductive element, intended on the one hand to be electrically and temporarily connected to the ignition coil to be tested and on the other hand, intended to be placed, during the diagnosis, at a distance not null and adjustable of the part, external to the cylinder head, of the central electrode of said spark plug, so as to allow the formation of a spark, between the central electrode of the spark plug and the element driver during engine operation.
- the conductive element is integral with an insulating element in which it is partially housed, and the length of the insulating element is a function of the distance d.
- the conductive element is a metal rod housed in a passage arranged in the insulating element, said rod protruding inside and outside the insulating element.
- the insulating element is a tube, the passage being substantially coaxial with the axis of the insulating tube and, the rod being glued or screwed to the tube over a portion of its length.
- the conducting element is the central electrode of a test spark plug devoid of its ground electrode, said test spark plug being partially inserted in the insulating tube at its end opposite to the spark plug.
- the insulating element includes a light for monitoring the formation of a spark in the insulating tube during diagnosis.
- An element facilitating the vision of the spark is inserted in the control light.
- FIG. 1 is a schematic view of a conventional ignition circuit
- FIG. 2 is a schematic view in axial section of a first embodiment of the device according to the invention
- FIG. 3 is a schematic view in axial section of a second embodiment of the present invention.
- FIG. 4 is a schematic view in axial section of the preferred embodiment of the present invention.
- the conventional ignition circuit 6 comprises a coil 11 whose primary winding is connected in series with a storage battery 7 and is electromagnetically coupled, to form a voltage transformer, a secondary winding placed in a high-voltage circuit comprising a burst air gap belonging to a spark plug 19.
- intermittent cuts are made by a breaker 17, interposed in the electrical line returning to ground of the winding.
- the opening and closing of the switch 17 is caused by an electronic control unit.
- the breaker 17 is an element of the igniter 13.
- the capacitor takes charge of inductor current and then discharges immediately.
- the sudden variation of the flow in the primary circuit causes the formation of a high voltage current in the secondary winding and is then distributed to one of the spark plugs 19.
- the method and the device according to the invention make it possible to detect a malfunction of the coil 1 1 of the type presented above.
- the device and method according to the invention make it possible to artificially create an additional voltage requirement to force the coil to supply a high voltage close to the maximum voltage value that it can supply. More specifically, during normal idling, the spark plug must provide a voltage between 10 and 15 Kv.
- the method and the device according to the invention make it possible, for example, to force the coil to supply a voltage greater than 25 Kv.
- the need for voltage changes with the aging of the candles.
- the ignition voltage for the formation of a spark reaches a value of the order of 30Kv when the spark plug is used.
- the threshold to be reached by the ignition coil being around 25 KV, it guarantees an effective test on most spark plugs.
- the device 20 consists of a second test spark plug 25 which is devoid of electrode mass, of a first external insulating tube 27 with an internal diameter slightly greater than that of the ceramic lower spout 29 of the test spark plug 25.
- the tube 27 is screwed or glued to the ceramic spout 29.
- the device according to the invention comprises also a second internal insulating tube 31 of smaller diameter and coaxial with the first insulating tube 27, the first tube 31 being able to be plugged in at one of its ends 31.a at the end 33 of the spark plug which is opposite to the lower ground electrode.
- the other end 31. b of the second insulating tube 31 being glued to the ceramic spout 29 of the test spark plug 25.
- a concave frustoconical recess 30 is provided in the ceramic spout 29.
- the end 31. b of the insulating tube 31 intended to be glued to the spout ceramic 29 has a shape complementary to that of the concave recess 30 and is inserted therein for assembly by gluing of the assembly.
- the purpose of the internal insulating tube 31 is, during the use of the device, to prevent the formation of a spark between the central electrode 32 of the test spark plug 25 and the base 35 of this same spark plug, or between the central electrode 32 of the test spark plug 25 and a metal surface of the engine, for example belonging to the spark plug well.
- the ignition harness is disconnected connecting the spark plug 23 to the rest of the ignition circuit.
- the device 20 according to the invention is then put in place on the spark plug 23. More specifically, the internal tube 31 is put in place on the free end 33 of the spark plug 23 while, the external tube 27 is in abutment on the base 37 of the spark plug 23.
- the respective length of the two tubes is a function of the distance "d" which it is desired to leave between the central electrode of the test spark plug 25 and the conductive free end 33 of the spark plug. This distance "d” is a function of the voltage which it is desired to have supplied by the coil during the diagnosis.
- the corresponding harness cable electric ignition is then connected to the free end 39 of the test spark plug 25. The engine is then started.
- the voltage which it supplies will be insufficient for the formation of a spark, on the one hand between the central electrode 32 of the test spark plug 25 and the free conductive end 33 of the spark plug, and on the other hand between the electrodes 22 and 24 of the spark plug 23. Misfires will occur. These measured and / or felt misfires or an increase in the misfire rate indicate that the coil is presumed to be faulty.
- FIG. 3 presents a simplified embodiment compared to the embodiment described above. In fact, in this embodiment, the base 35 of the test spark plug and the internal insulating tube 31 have been eliminated.
- the value of the additional voltage necessary for the establishment of an electric arc between the central electrode 32 of the test spark plug 25 and the free conductive end 33 of the spark plug is adjusted by the choice of the length of the outer tube 27 or the length of the inner tube 31 if the latter is present.
- the device according to the invention comprises an insulating element 41, or insulating tube 41, consisting of two coaxial cylinders 45 and 47.
- a first hollowed-out lower cylinder 45 is open at its end and the second upper cylinder 47 of smaller diameter is produced integrally with the first cylinder 45.
- An axial passage 42 passing through the upper cylinder 47 and opening into the internal cavity of the lower cylinder 45 is arranged in the insulating element 41. This passage opens into the recess of the lower cylinder 45.
- a metal rod 49 of length greater than the total length or height of the passage 42, is inserted in the passage 42 so as to project upwards and towards the bottom of the upper cylinder 47. The metal rod 49 is screwed or glued in the passage 42.
- the metal rod 49 has at its upper free end 59. projecting from the outside of the second cylinder a groove forming a split head 55 able to cooperate with a screwdriver.
- the free end of the second cylinder is able to cooperate with the tip of the ignition electrical harness (not shown) in order to electrically connect said harness and the metal rod 49.
- the lower cylinder 45 has a light 51 to allow the operator to see the spark emerging between the metal rod 49 and the central electrode of the spark plug 23.
- This light 51 extends from the radial outer face 55 of the lower cylinder 45 and opens into the recess 53 of the first cylinder near the lower end 59. b of the metal rod 59.
- an optical fiber or a transparent bar may be inserted (e) in visibility light 51.
- the ignition harness is disconnected connecting the spark plug 23 to the rest of the ignition circuit.
- the device 41 according to the invention is then placed on the base 37 of the spark plug 21.
- the recess 53 of the first cylinder has a diameter greater than that of the part of the spark plug 23 which extends outside of the cylinder head 21 of the engine, surrounded by the device 41, but of diameter smaller than that of the base 37 of the spark plug 23. This allows the insertion of the external part of the spark plug 23 in the recess 53 of the insulating element 41.
- the device 41 abuts the upper face 37. a of the base 37 of the spark plug 23.
- the device 41 is dimensioned so that the metal rod 49 is coaxial with the spark plug d ignition 23, and so that there is a non-zero distance "d" between the opposite ends of the free conductive end 33 of the spark plug 23 and said metal rod 49.
- the distance "d” can also be adjusted by an operator using the groove 55 by means of a screwdriver. By adjusting this distance, the value of the additional voltage necessary for the establishment of an electric arc between the metal rod 49 and the central electrode of the spark plug 23 can be adjusted.
- the engine is then started. If the ignition coil is defective, the voltage it supplies will be insufficient to form a spark, a part between the metal rod 49 and the central electrode of the spark plug, and other part between the electrodes of the spark plug 23. Misfire will therefore occur. These measured or perceived failures, or an increase in the failure rate will indicate that the coil is presumed to be faulty. In addition, thanks to the light 51 the operator will be able to see if the test sparks appear and to carry out a visual check of the good progress of the test.
- the insulating tube 27 or 41 may be made of a transparent material.
- the invention makes it possible to control the voltage which the ignition coil will have to deliver during the test phases.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Spark Plugs (AREA)
- Testing Of Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008543876A JP2009518575A (ja) | 2005-12-05 | 2006-11-30 | 内燃機関の点火コイルの診断方法および診断装置 |
EP06842076A EP1957789A1 (fr) | 2005-12-05 | 2006-11-30 | Procede et dispositif de diagnostic d'une bobine d'allumage d'un moteur a combustion interne |
US12/096,258 US20090160450A1 (en) | 2005-12-05 | 2006-11-30 | Method and device for providing diagnostics for an internal combustion engine ignition coil |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0553728A FR2894298A1 (fr) | 2005-12-05 | 2005-12-05 | Procede et dispositif de diagnostic d'une bobine d'allumage d'un moteur combustion interne |
FR0553728 | 2005-12-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007066031A1 true WO2007066031A1 (fr) | 2007-06-14 |
Family
ID=36888901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2006/051265 WO2007066031A1 (fr) | 2005-12-05 | 2006-11-30 | Procede et dispositif de diagnostic d'une bobine d'allumage d'un moteur a combustion interne |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090160450A1 (fr) |
EP (1) | EP1957789A1 (fr) |
JP (1) | JP2009518575A (fr) |
CN (1) | CN101356363A (fr) |
FR (1) | FR2894298A1 (fr) |
RU (1) | RU2008127380A (fr) |
WO (1) | WO2007066031A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9249773B2 (en) | 2012-10-23 | 2016-02-02 | GM Global Technology Operations LLC | Apparatus and method for static testing a spark plug assembled in an internal combustion engine including cracked ceramic insulator detection |
RU2655681C1 (ru) * | 2017-08-28 | 2018-05-29 | Алексей Николаевич Звеков | Способ диагностики компонентов системы зажигания непрерывной последовательностью искровых разрядов |
RU2678872C1 (ru) * | 2017-10-24 | 2019-02-05 | Алексей Николаевич Звеков | Тестер свечей зажигания |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1484335A (en) * | 1924-02-19 | kerrigan | ||
US1487852A (en) * | 1922-12-12 | 1924-03-25 | Hanauer Henry | Spark indicator and intensifier for gasoline engines |
US1907069A (en) * | 1929-05-25 | 1933-05-02 | Herman C Heaton | Indicator means for ignition systems and the like |
US4384256A (en) * | 1981-03-18 | 1983-05-17 | Monte Ronald J Di | Diagnostic ignition spark detector |
-
2005
- 2005-12-05 FR FR0553728A patent/FR2894298A1/fr not_active Withdrawn
-
2006
- 2006-11-30 RU RU2008127380/06A patent/RU2008127380A/ru unknown
- 2006-11-30 US US12/096,258 patent/US20090160450A1/en not_active Abandoned
- 2006-11-30 WO PCT/FR2006/051265 patent/WO2007066031A1/fr active Application Filing
- 2006-11-30 EP EP06842076A patent/EP1957789A1/fr not_active Withdrawn
- 2006-11-30 CN CNA2006800505103A patent/CN101356363A/zh active Pending
- 2006-11-30 JP JP2008543876A patent/JP2009518575A/ja not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1484335A (en) * | 1924-02-19 | kerrigan | ||
US1487852A (en) * | 1922-12-12 | 1924-03-25 | Hanauer Henry | Spark indicator and intensifier for gasoline engines |
US1907069A (en) * | 1929-05-25 | 1933-05-02 | Herman C Heaton | Indicator means for ignition systems and the like |
US4384256A (en) * | 1981-03-18 | 1983-05-17 | Monte Ronald J Di | Diagnostic ignition spark detector |
Also Published As
Publication number | Publication date |
---|---|
CN101356363A (zh) | 2009-01-28 |
JP2009518575A (ja) | 2009-05-07 |
US20090160450A1 (en) | 2009-06-25 |
RU2008127380A (ru) | 2010-01-20 |
FR2894298A1 (fr) | 2007-06-08 |
EP1957789A1 (fr) | 2008-08-20 |
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