EP1671338B1 - Bobine d'allumage concue pour un moteur a allumage commande - Google Patents

Bobine d'allumage concue pour un moteur a allumage commande Download PDF

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Publication number
EP1671338B1
EP1671338B1 EP04766759A EP04766759A EP1671338B1 EP 1671338 B1 EP1671338 B1 EP 1671338B1 EP 04766759 A EP04766759 A EP 04766759A EP 04766759 A EP04766759 A EP 04766759A EP 1671338 B1 EP1671338 B1 EP 1671338B1
Authority
EP
European Patent Office
Prior art keywords
winding
premagnetization
ignition coil
primary
ignition
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.)
Expired - Lifetime
Application number
EP04766759A
Other languages
German (de)
English (en)
Other versions
EP1671338A1 (fr
Inventor
Markus Weimert
Tim Skowronek
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1671338A1 publication Critical patent/EP1671338A1/fr
Application granted granted Critical
Publication of EP1671338B1 publication Critical patent/EP1671338B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/38—Auxiliary core members; Auxiliary coils or windings
    • 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
    • F02P3/04—Layout of circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias

Definitions

  • the invention relates to an ignition coil for a gasoline engine according to the closer defined in the preamble of claim 1. Art.
  • Such an ignition coil is an energy-transmitting high-voltage source and is used in the gasoline engine to control a spark plug, which in turn ignites the fuel mixture in the combustion chamber of the engine and thus initiates the movement of the piston and thus the crankshaft.
  • the storable magnetic energy is essential for the ignition coil and depends on the structure of its magnetic circuit and its material properties.
  • the magnetic circuit is usually made of a ferromagnetic material and is commonly referred to as an "iron circle". Usually this is composed of a laminated core or is designed as a metal powder core. Since the iron circuit in certain embodiments does not consistently wrap around the winding but has gaps, also referred to as air gaps, it is also referred to as a "sheared" iron circle.
  • a permanent magnet in the iron cycle.
  • Such a permanent magnet or a plurality of such permanent magnets are integrated into the magnetic circuit in such a way that the direction of the flux density is directed counter to the excitation field of the current-carrying winding. This is also referred to as a "premagnetization", since in the passive state, in which no electric current flows, there is already a magnetic flux in the iron circuit.
  • This biasing makes it possible to shift the magnetic saturation of the iron circuit, based on the magnitude of the primary current, so that more total magnetic energy can be stored in the ignition coil. This is in practice a common measure of energy optimization of ignition coils.
  • permanent magnets are temperature-dependent, so that it can come at high flow and high temperatures at the same time for demagnetization of a permanent magnet. Such demagnetization is an irreversible process.
  • the properties of a permanent magnet are mainly determined by its material and the geometry of the structure. If a permanent magnet is installed in a conventional ignition coil, its properties can no longer be modified in a targeted manner. For example, if the same ignition coil is to be used in another engine that requires other characteristics of the ignition coil, the energy optimization of the ignition coil may need to be changed. The energy optimization of the ignition coil is adjusted by means of the bias. For this purpose, the permanent magnet must be replaced and replaced by a magnet with possibly modified geometry.
  • the invention has for its object to provide an ignition coil for a gasoline engine, in which the energy optimization by adjusting the bias of the iron circuit without simultaneous structural modification is possible.
  • an ignition coil for a gasoline engine of the type mentioned ie with a coil core, in which by means of a current-carrying, substantially coil-shaped primary winding, a primary magnetic field is inducible, and a substantially coil-shaped secondary winding, in which by the primary magnetic field, at least one spark plug-driving energy field can be built, wherein on the coil core a biasing device for forming a primary magnetic field of the opposite bias field is effective, the biasing a current-carrying, essentially Having coil-shaped bias winding, can be achieved by the bias winding by means of a corresponding electric current advantageously a bias.
  • the rod core can be correspondingly extended, in particular in the case of rod coils, which brings about further advantages in energy optimization.
  • the winding length may increase accordingly, especially as turns, which are located on permanent magnets, are physically hardly effective.
  • Vormagnetleiterswicklung represent the only way to optimize energy, since in the case of a required maximum length of the rod core under certain circumstances no space for a permanent magnet is available.
  • the bias by means of additional winding is also flexible, d. H.
  • the magnetic field strength can be freely selected via an appropriate control with optimal utilization of the core material.
  • the bias flux density can be increased up to the saturation polarization of the core material.
  • the ignition coil according to the invention is very flexible in terms of energy yield, with no structural changes must be made. Especially in space problems in the axial direction therefore provides the invention Embodiment of an ignition coil is an advantageous alternative to permanent magnets.
  • the primary winding and the bias winding are wound substantially parallel to each other around the spool core.
  • the current flow directions of the electric current should be aligned in antiparallel in adjacent turns of the primary winding and the Vormagnetleiterswicklung.
  • the power supply terminals of the primary winding and the bias winding can be formed separately from each other.
  • the primary winding and the bias winding may also be jointly controlled and have a common power supply connection. It may be advantageous if a series resistor is connected between the power supply terminal and the bias winding.
  • the bias winding can be actuated either permanently or temporarily, and thereby generates a magnetic field which counteracts the field of excitation of the primary winding and thereby causes the effect of premagnetization.
  • the bias by means of additional winding according to the invention is temperature independent.
  • the opposite end of the power supply terminal of the bias winding can be connected in a particularly simple embodiment of an ignition coil according to the invention with ground.
  • a manufacturing technology particularly advantageous structure can be achieved in that the primary winding and the Vormagnetleiterswicklung is wound as a single multi-layer winding on the spool core, wherein the multi-layer winding is separated to separate primary and Vormagnetleiterswicklung at least one point and contacted the free ends for connection purposes are.
  • This has manufacturing technology the advantage that an additional operation is saved.
  • FIG. 1 shows a simplified schematic side view of an ignition coil 10 for a gasoline engine of a motor vehicle, in which a primary winding 14 and a bias winding 20 are shown. An existing secondary winding is performed in a known manner and not shown in detail in Figure 1.
  • the primary winding 14 consists of an electrically conductive, insulated wire, which is wound on a rod core 12, wherein the wire is wound from a left in Figure 1 end of the rod core 12 in the direction of a in Figure 1 right end of the rod core 12.
  • the secondary winding, not shown in greater detail, of the ignition coil 10, in which an energy field is induced by a magnetic field Hp generated on the primary side, is mounted adjacent to the primary winding 14 of this electrically insulated.
  • the bias winding 20 shown in dashed lines in FIG. 1 represents a completely independent winding.
  • the electrically conductive, insulated wire of the bias winding 20 is of a left end of the rod core 12 in FIG. 1 in the direction of a right end in FIG wound around the rod core 12, wherein the wire of the bias winding 20 is inserted into the space between the individual turns of the primary winding 14 almost over the entire extent range of the windings.
  • the bias winding 20 and the primary winding 14 are thus wound in parallel over most of the length of the rod core 12.
  • a connection 24 for supplying an electrical current I P to the primary winding 14 is arranged separately from a connection 22 for supplying an electrical current I V to the bias winding 20.
  • both terminals 22 and 24 can be performed separately via a common connector 28 on a wiring harness of a motor vehicle.
  • the bias winding 20 may also be integrated into the primary winding 14.
  • the primary winding 14 and the bias winding 20 are separated by appropriately separating and contacting the respective wire ends of the co-applied winding.
  • the terminals 22 and 24 of the primary winding 14 and the bias winding 20 can be performed separately via a common connector 28 on the wiring harness of the motor vehicle.
  • FIG. 2 shows a schematic diagram of an ignition system 1 with a separate control of the bias winding 20 of an ignition coil 10 according to the invention for a gasoline engine, wherein the ignition coil 10 - as shown in Figure 1 - a coil core 12, to which the primary winding 14 and the bias winding 20th are wound up.
  • a separate bias winding drive line 30 is led from the power connector 22 presently connected to the wiring harness of the motor vehicle (not shown) to one end of the bias winding 20 of the ignition coil 10.
  • the other winding end of the bias winding 20 is connected to ground GND.
  • a separate primary winding drive line 32 which may be connected to the primary-side power connector 24, for example, also with the (not shown) harness of the motor vehicle, led to one end of the primary winding 14 of the ignition coil 10.
  • the other end of the primary winding 14 is connected to a transistor 34. This is driven at the base via an engine control 36 of the gasoline engine.
  • the also surrounding the coil core 12 secondary winding 16 of the ignition coil 10 is part of an ignition circuit forming a secondary circuit 3, in which it contacted in a known manner with one end connected to a ground GND spark plug 18 of a gasoline engine.
  • FIG. 3 shows a schematic diagram of an ignition system 1 'with a common control of the primary winding 14 and the bias winding 20.
  • the primary winding drive line 32 from a power connector 26 on a (not shown) wiring harness of the motor vehicle to one end of the primary winding 14 of the ignition coil 10.
  • the other end of the primary winding 14 is connected to a transistor 34, which is driven at the base via the engine control 36 of the gasoline engine.
  • a bias winding drive line 30 is here connected to the current terminal 26 of the primary winding drive line 32, the bias winding drive line 30 branching off from the primary winding drive line 32 at a junction 29 and via a bias resistor Rv to one end of the bias winding wound on the coil core 12 20 of the ignition coil 10 is guided.
  • the other winding end of the bias winding 20 is connected to ground GND.
  • the arrangement of the secondary winding 14 of the ignition coil 10 and the configuration of the secondary circuit 3 with a spark plug 18 of a gasoline engine otherwise corresponds to the embodiment of FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Claims (8)

  1. Bobine d'allumage (10) d'un moteur à essence comportant un noyau à bobine (12) dans lequel un champ magnétique primaire (Hp) est induit par un enroulement primaire (14) essentiellement en forme de bobine traversé par un courant électrique (Ip), dans et un enroulement secondaire (16) essentiellement en forme de bobine, dans lequel le champ primaire (Hp) génère un champ d'énergie commandant au moins une bougie d'allumage (18),
    le noyau (12) étant soumis à l'action de pré-aimantation pour développer un champ de pré-aimantation (Hv) opposé au champ magnétique primaire (Hp),
    caractérisée en ce que
    l'installation de pré-aimantation comporte un enroulement de pré-aimantation (20) essentiellement en forme de bobine, traversé par un courant (Iv).
  2. Bobine d'allumage selon la revendication 1,
    caractérisée en ce que
    l'enroulement primaire (14) et l'enroulement de pré-aimantation (20) sont enroulés d'une manière principalement parallèle l'une à l'autre autour du noyau (12).
  3. Bobine d'allumage selon la revendication 1 ou 2,
    caractérisée en ce que
    le sens de passage du courant électrique (Ip, Iv) dans les spires voisines de l'enroulement primaire (14) et de l'enroulement de pré-aimantation (20) est anti-parallèle.
  4. Bobine d'allumage selon l'une des revendications 1 à 3,
    caractérisée en ce que
    les bornes d'alimentation électrique (22, 24) de l'enroulement primaire (14) et de l'enroulement de pré-aimantation (20) sont séparées.
  5. Bobine d'allumage selon l'une des revendications 1 à 3,
    caractérisée en ce que
    l'enroulement primaire (14) et l'enroulement de pré-aimantation (20) ont une borne commune (26) d'alimentation en courant.
  6. Bobine d'allumage selon la revendication 5,
    caractérisée par
    une résistance intermédiaire (Rv) entre le branchement d'alimentation en courant (26) et l'enroulement de pré-aimantation (20).
  7. Bobine d'allumage selon l'une des revendications 4 à 6,
    caractérisée en ce que
    l'extrémité de l'enroulement de pré-aimantation (20), à l'opposé de la borne de branchement d'alimentation en courant (22, 24 ; 26), est reliée à la masse (GND).
  8. Bobine d'allumage selon l'une des revendications 1 à 7,
    caractérisée en ce que
    l'enroulement primaire (14) et l'enroulement de pré-aimantation (20) sont un unique enroulement à plusieurs couches sur le noyau (12), l'enroulement à plusieurs couches est ouvert au moins à un endroit pour séparer l'enroulement primaire (14) de l'enroulement de pré-aimantation (20), et les extrémités libres sont mises en contact pour le branchement.
EP04766759A 2003-09-26 2004-09-10 Bobine d'allumage concue pour un moteur a allumage commande Expired - Lifetime EP1671338B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10344891A DE10344891A1 (de) 2003-09-26 2003-09-26 Zündspule für einen Ottomotor
PCT/EP2004/052122 WO2005031771A1 (fr) 2003-09-26 2004-09-10 Bobine d'allumage conçue pour un moteur à allumage commandé

Publications (2)

Publication Number Publication Date
EP1671338A1 EP1671338A1 (fr) 2006-06-21
EP1671338B1 true EP1671338B1 (fr) 2007-09-05

Family

ID=34353111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04766759A Expired - Lifetime EP1671338B1 (fr) 2003-09-26 2004-09-10 Bobine d'allumage concue pour un moteur a allumage commande

Country Status (5)

Country Link
US (1) US20070069845A1 (fr)
EP (1) EP1671338B1 (fr)
JP (1) JP2007507098A (fr)
DE (2) DE10344891A1 (fr)
WO (1) WO2005031771A1 (fr)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1501485A (en) * 1924-07-15 Ignition system
US3140423A (en) * 1961-02-06 1964-07-07 Lucas Industries Ltd Spark ignition apparatus for internal combustion engine
US3445723A (en) * 1966-12-01 1969-05-20 Ford Motor Co Ignition system applying induced voltage to the coil primary
GB2115986B (en) * 1982-02-25 1985-09-04 Ainslie Walthew Hi-volt fast reactor electro ferrodynamic oil ignition coil system
JP2995763B2 (ja) * 1989-11-10 1999-12-27 株式会社デンソー 点火コイル
JPH0543460Y2 (fr) * 1990-07-13 1993-11-02
US6188304B1 (en) * 2000-03-03 2001-02-13 Delphi Technologies, Inc. Ignition coil with microencapsulated magnets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP2007507098A (ja) 2007-03-22
DE502004004900D1 (de) 2007-10-18
DE10344891A1 (de) 2005-04-21
US20070069845A1 (en) 2007-03-29
EP1671338A1 (fr) 2006-06-21
WO2005031771A1 (fr) 2005-04-07

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