EP1671338A1 - Zündspule für einen ottomotor - Google Patents
Zündspule für einen ottomotorInfo
- Publication number
- EP1671338A1 EP1671338A1 EP04766759A EP04766759A EP1671338A1 EP 1671338 A1 EP1671338 A1 EP 1671338A1 EP 04766759 A EP04766759 A EP 04766759A EP 04766759 A EP04766759 A EP 04766759A EP 1671338 A1 EP1671338 A1 EP 1671338A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- winding
- ignition coil
- bias
- primary
- coil
- 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
Classifications
-
- 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 kind defined in the preamble of claim 1.
- 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 ice and its material properties.
- the magnetic circuit generally consists of a ferromagnetic material and is generally also referred to as an “iron circle”. This is usually composed of a laminated core or is designed as a metal powder core. Since the iron circle in certain embodiments does not consistently enclose the winding but has gaps, which are also called air gaps, one speaks of a "sheared" iron circle.
- This premagnetization makes it possible to shift the magnetic saturation of the iron circuit - based on the level of the primary current - so that overall more magnetic energy can be stored in the ignition coil. In practice, this is a common measure for energy optimization of ignition coils.
- the permanent magnet or magnets have to be installed in the iron circuit with considerable manufacturing outlay.
- rod coils it is important that the edges of the magnets are rounded off before installation in order to counter the risk of electrical breakdown.
- attention must be paid to the polarity of the magnet or magnets, since an incorrect polarity counteracts the desired effect of energy storage.
- permanent magnets are temperature-dependent, so that a permanent magnet can be demagnetized at high flow rates and at the same time at high temperatures. Such demagnetization is an irreversible process.
- the properties of a permanent magnet are primarily 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 specifically changed. If, for example, the same ignition coil is to be used in another engine that requires different parameters of the ignition coil, the energy optimization of the ignition coil may have to be changed. The energy optimization of the ignition coil is set by means of the premagnetization. For this purpose, the permanent magnet must be replaced and replaced by a magnet with a possibly changed geometry.
- the invention has for its object to provide an ignition coil for a gasoline engine, in which the energy optimization is possible by adapting the bias of the iron circuit without simultaneous structural modification.
- an ignition coil for a gasoline engine of the type mentioned at the outset that is to say with a coil core in which a primary magnetic field can be induced by means of a current-carrying, essentially coil-shaped primary winding, and an essentially coil-shaped secondary winding in which an energy field which drives at least one spark plug through the primary magnetic field can be built up, with a biasing device acting on the coil core to form a biasing field opposing the primary magnetic field, the biasing device being a current-carrying, essentially Chen coil-shaped bias winding, a bias can be advantageously achieved by the bias winding with the help of an appropriate electrical current.
- the rod core can be lengthened, in particular in the case of rod coils, which brings further advantages in terms of energy optimization.
- the winding length may advantageously also increase accordingly, especially since windings located above permanent magnets are hardly physically effective.
- the premagnetization winding can be the only way of optimizing energy, since if the maximum length of the rod core is required, there may be no space left for a permanent magnet.
- the pre-magnetization by means of additional winding is also flexible, i. H.
- the magnetic field strength can also be freely selected by means of a corresponding control with optimal use 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 with regard to its energy yield, with no structural changes having to be made. Especially in the case of space problems in the axial direction, the invention design of an ignition coil represents an advantageous alternative to permanent magnets.
- the bias winding can also have a price advantage over the use of permanent magnets.
- the primary winding and the bias winding are wound essentially parallel to one another around the coil core.
- the directions of current flow of the electrical current in mutually adjacent turns of the primary winding and the bias winding should be oriented antiparallel.
- the power supply connections of the primary winding and the bias winding can be formed separately from one another.
- the primary winding and the bias winding can also be controlled together and have a common power supply connection. It can be advantageous if a series resistor is connected between the power supply connection and the bias winding.
- the bias winding can be controlled either permanently or temporarily, depending on the embodiment of the control, and thereby generates a magnetic field which counteracts the field of excitation of the primary winding and thereby causes the effect of the bias.
- the premagnetization by means of an additional winding according to the invention is temperature-independent.
- the end of the bias winding opposite the power supply connection can be connected to ground in a particularly simple embodiment of an ignition coil according to the invention.
- a construction that is particularly advantageous in terms of production technology can be achieved in that the primary winding and the bias winding are wound as a single multi-layer winding on the coil core, the multi-layer winding for separating the primary winding and the bias winding being separated at at least one point and contacting the free ends for connection purposes are. In terms of production technology, this has the advantage that an additional work step is saved.
- FIG. 1 in a simplified schematic side view of an ignition coil designed according to the invention, in which a primary winding and a bias winding are shown;
- FIG. 2 shows a schematic circuit diagram of an ignition system with separate activation of the bias magnetization of an ignition coil according to FIG. 1;
- FIG. 3 shows a schematic circuit diagram of an ignition system with a common control of the primary winding and the bias winding of an ignition coil according to FIG. 1.
- 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.
- a secondary winding which is also present, is designed in a known manner and is not shown in detail in FIG. 1.
- the primary winding 14 consists of an electrically conductive, insulated wire which is wound onto a rod core 12, the wire being wound from an end of the rod core 12 which is on the left in FIG. 1 in the direction of an end of the rod core 12 which is on the right in FIG.
- the secondary winding (not shown) of the ignition coil 10 in which an energy field is induced by a magnetic field Hp generated on the primary side, is attached electrically insulated from the primary winding 14 adjacent to the primary winding.
- the biasing winding 20 shown in dashed lines in FIG. 1 represents a completely independent winding in the embodiment shown.
- the electrically conductive, insulated wire of the biasing winding 20 is from a left end of the rod core 12 in FIG. 1 in the direction of a right end in FIG of the rod core 12, the wire of the bias winding 20 being inserted into the space between the individual turns of the primary winding 14 almost over the entire extent of the windings.
- the bias winding 20 and the primary winding 14 are thus wound in parallel over the majority of the length of the rod core 12.
- the current flow Iv in one winding of the bias winding 20 and the current flow Ip in an adjacent winding of the primary winding 14 is anti-parallel, so that the magnetic fields that build up, a bias magnetic field Hv and the primary-side magnetic field Hp also have an anti-parallel orientation. This alignment provides the desired "bias effect"
- the bias winding 20 can also be integrated into the primary winding 14.
- the primary winding 14 and the bias winding 20 are separated from the winding which has been applied together by correspondingly cutting and contacting the respective wire ends.
- the connections 22 and 24 of the primary winding 14 and the bias winding 20 can in turn be routed separately to the wiring harness of the motor vehicle via a common connector 28.
- FIG. 2 shows a schematic circuit diagram representation of an ignition system 1 with a separate actuation of the bias winding 20 of an ignition coil 10 according to the invention for a gasoline engine, the ignition coil 10 - as shown in FIG. 1 - having a coil core 12 on which the primary winding 14 and the Bias winding 20 are wound.
- bias winding control line 30 is led from the current connection 22 presently connected to the (not shown) wiring harness of the motor vehicle 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 control line 32 which can also be connected to the primary side power connection 24, for example, also to the (not shown) wiring harness of the motor vehicle, is 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 controlled at the base via an engine control 36 of the gasoline engine.
- the secondary winding 16 of the ignition coil 10 which also surrounds the coil core 12
- bias field Hv does not have to be permanently present, such separate control of the bias winding 20 of the ignition coil 10 is practical.
- FIG. 3 shows a schematic circuit diagram representation of an ignition system 1 ′ with a common control of the primary winding 14 and the bias winding 20.
- the primary winding control line 32 leads in the primary circuit from a power connection 26 on a wiring harness (not shown) 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 controlled at the base via the engine control 36 of the gasoline engine.
- a bias winding control line 30 is here connected to the current connection 26 of the primary winding control line 32, the bias winding control line 30 branching off from the primary winding control line 32 at a connection point 29 and via a series resistor Rv to one end of the one on the coil core 12 coiled bias winding 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 according to 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)
Abstract
Description
Claims
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 (de) | 2003-09-26 | 2004-09-10 | Zündspule für einen ottomotor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1671338A1 true EP1671338A1 (de) | 2006-06-21 |
EP1671338B1 EP1671338B1 (de) | 2007-09-05 |
Family
ID=34353111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04766759A Expired - Fee Related EP1671338B1 (de) | 2003-09-26 | 2004-09-10 | Zündspule für einen ottomotor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070069845A1 (de) |
EP (1) | EP1671338B1 (de) |
JP (1) | JP2007507098A (de) |
DE (2) | DE10344891A1 (de) |
WO (1) | WO2005031771A1 (de) |
Family Cites Families (7)
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 (de) * | 1990-07-13 | 1993-11-02 | ||
US6188304B1 (en) * | 2000-03-03 | 2001-02-13 | Delphi Technologies, Inc. | Ignition coil with microencapsulated magnets |
-
2003
- 2003-09-26 DE DE10344891A patent/DE10344891A1/de not_active Withdrawn
-
2004
- 2004-09-10 EP EP04766759A patent/EP1671338B1/de not_active Expired - Fee Related
- 2004-09-10 DE DE502004004900T patent/DE502004004900D1/de active Active
- 2004-09-10 WO PCT/EP2004/052122 patent/WO2005031771A1/de active IP Right Grant
- 2004-09-10 US US10/573,608 patent/US20070069845A1/en not_active Abandoned
- 2004-09-10 JP JP2006527398A patent/JP2007507098A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO2005031771A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005031771A1 (de) | 2005-04-07 |
DE10344891A1 (de) | 2005-04-21 |
JP2007507098A (ja) | 2007-03-22 |
EP1671338B1 (de) | 2007-09-05 |
DE502004004900D1 (de) | 2007-10-18 |
US20070069845A1 (en) | 2007-03-29 |
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