EP0201173A1 - Système d'allumage - Google Patents

Système d'allumage Download PDF

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Publication number
EP0201173A1
EP0201173A1 EP86301914A EP86301914A EP0201173A1 EP 0201173 A1 EP0201173 A1 EP 0201173A1 EP 86301914 A EP86301914 A EP 86301914A EP 86301914 A EP86301914 A EP 86301914A EP 0201173 A1 EP0201173 A1 EP 0201173A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
pair
cylinders
windings
primary winding
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
Application number
EP86301914A
Other languages
German (de)
English (en)
Other versions
EP0201173B1 (fr
Inventor
Azzam Mohammed Said Qasrawi
Michael John Lee
Peter David Jones
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.)
ZF International UK Ltd
Original Assignee
Lucas Electrical Electronics and Systems Ltd
Lucas Industries Ltd
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10576748&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0201173(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Lucas Electrical Electronics and Systems Ltd, Lucas Industries Ltd filed Critical Lucas Electrical Electronics and Systems Ltd
Publication of EP0201173A1 publication Critical patent/EP0201173A1/fr
Application granted granted Critical
Publication of EP0201173B1 publication Critical patent/EP0201173B1/fr
Expired 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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/03—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means
    • 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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/02—Arrangements having two or more sparking plugs
    • 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
    • F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
    • F02P15/08—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders

Definitions

  • This invention relates to an ignition system for a multi-cylinder engine.
  • an ignition system for a multi-cylinder internal combustion engine comprising two igniters in each cylinder of the engine, each igniter having a first terminal and a second terminal and the second terminals being electrically connected to the engine cylinder block, a primary winding arrangement, a set of secondary windings equal in number to the number of cylinders and magnetically coupled to the primary winding arrangement and means for controlling current flow in the primary winding arrangement in accordance with the timing conditions relating to the cylinders characterized, in that the secondary windings are grouped to form one or more pairs, the or each pair being associated with a respective pair of cylinders, and the or each pair of secondary windings is connected to the igniters of the associated pair of cylinders such that the two ends of one winding of the pair are connected to respective first terminals of one igniter in one cylinder and one igniter in the other cylinder and the two ends of the other winding are connected to respective first terminals of the other igniter in said one cylinder and the other igniter in the other
  • the present invention provides a system in which sparks are created with a voltage across each secondary winding which is less than twice the breakdown voltage of an igniter under compression pressure without the need to connect an impedance element between one end of the secondary winding and ground.
  • FIG. 1 there is shown an ignition system for an internal combustion engine having four cylinders 11 to 14.
  • the cylinders 12, 13 and 14 lag the cylinder 11 in operation respectively by 180°, 90° and 270° of cam shaft rotation.
  • Each of the cylinders is provided with a pair of igniters in the form of a pair of spark plugs 15, 16.
  • Each spark plug has a central electrode electrically isolated from its metallic body and an earth electrode which is connected to the metallic body.
  • the central electrode provides a first terminal and the earth electrode provides a second electrode. Because the metallic body is mounted in the cylinder block, the earth electrode is electrically connected to the cylinder bl'ock.
  • the ignition system also includes four primary windings 21 to 24 each of which is individually magnetically coupled to a respective one of four secondary windings 25 to 28 by magnetic cores 17 to 20.
  • the secondary windings 25 to 28 are grouped to form a first pair comprising windings 25 and 26 and a second pair which comprises windings 27 and 28.
  • the pair of windings 25, 26. is associated with the pair of cylinder 11 and 12, and the pair of windings 27, 28 is associated with the pair of cylinders 13 and 14.
  • the two ends of secondary winding 25 are connected to the central electrode of spark plug 15 in cylinder 11 and the central electrode of spark plug 15 in cylinder 12.
  • the two ends of secondary winding 26 are connected to the central electrode of spark plug 16 in cylinder 11 and the central electrode of spark plug 16 in cylinder 12.
  • the pair of windings 27 and 28 are connected to the spark plugs in the pair of cylinder 13, 14 in a similar manner.
  • the system also includes a power supply 30 supplying positive and negative supply rails 31 and 32.
  • the power supply 30 may simply be a battery or it may be a battery together with a DC/DC converter.
  • a capacitor 33 is connected between rails 31 and 32.
  • the rail 31 is connected to one end of each of the primary windings 21 to 24.
  • the other end of each of primary windings 21 to 24 is connected through a respective one of a set of thyristors 35 to 38 to rail 32.
  • the gates of thyristors 35 to 38 are connected to a control unit 40.
  • the control unit 40 fires the thyristors 35 to 38 with desired timing. Specifically, thyristors 35 and 36 are fired simultaneously, or nearly simultaneously, when one of cylinders 11 and 12 is performing a compression stroke and at the instant that the spark is required in the cylinder performing the compression stroke. Thyristors 37 and 38 are fired in a similar manner.
  • capacitor 33 When, for example, cylinder 11 is performing a compression stroke and thyristors 35 and 36 are fired, capacitor 33 will discharge through windings 21 and 22. This will cause a high voltage to be generated across both secondary windings 25 and 26. Because the earth electrodes of plugs 15, 16 are commonly connected, this high voltage will cause a spark to be created in the plugs 15, 16 in both cylinders 11, 12. Thus, sparks will be produced in cylinder 11 at the required instant. Sparks will also be created in cylinder 12. However, because cylinder 12 lags cylinders 11 by 180°, this cylinder will be performing an exhaust stroke and so the sparks will be of no consequence.
  • each of the secondary windings 25 to 28 produces a high voltage, the gap of one of the associated spark plugs will be under compression pressure and the other will be under exhaust pressure. When a gap is under exhaust pressure, a spark is produced with a lower voltage and a lower energy than that required for a gap under compression pressure. Thus, each of the windings 25 to 28 produces sparks in its associated plugs 15, 16 with a voltage and energy which is less than twice that which would be required if both plugs were under compression pressure.
  • FIG 2 there is shown an ignition system for an engine having four cylinders 51 to 54 which are similar to the cylinders 11 to 14 shown in figure 1.
  • the cylinders 51 to 54 are each provided with a pair of spark plugs 55, 56 which are similar to the plugs 15, 16 shown in figure 1.
  • This ignition system also includes a pair of primary windings 60, 61.
  • the winding 60 is magnetically coupled with a pair of secondary windings 62, 63 by a magnetic core 57 and the winding 61 is magnetically coupled to a pair of secondary windings 64, 65 by a magnetic core 58.
  • the windings 62 to 65 are connected to the plugs 55, 56 in cylinder 51 to 54 in a similar manner to the connections between windings 25 to 28 and plugs 15, 16 in Figure 1.
  • the system further includes a power supply 70 which is similar to the power supply 30 and which supplies power to a positive supply rail 71 and a negative supply rail 72.
  • the rail 71 is connected to one end of each of primary windings 60, 61.
  • the other end of each of these windings 60, 61 is connected through a respective switch 73, 74, which may be a transistor, to the rail 72.
  • the switches 73, 74 are controlled by a control unit 75.
  • the control unit 75 turns on and off switches 73 and 74 with desired timing.
  • switch 74 When, for example, switch 74 is turned on, current flows in the primary winding 60.
  • this switch When this switch is turned off, a high voltage appears across each of secondary windings 62 and 63 thereby causing ignition sparks to be generated in the spark plugs 55, 56 in each of cylinders 51 and 52.
  • the switch 74 is switched on shortly before sparks are required in either one of cylinders 51 and 52 and turned off at the instant the sparks are required.
  • the system shown in Figure 2 possesses the advantage over the system shown in Figure 1 that only two primary windings are required.
  • the ignition system of Figure 1 is of the capacitive discharge type and the system of Figures 2 is of the inductive discharge type, it is to be appreciated that the systems of Figure 1 could be modified so as to be of the inductive discharge type and the systems of Figures 2 could be modified to be of the capacitive discharge type. Also, although the systems of Figure 1 and 2 and are shown with a four cylinder engine, it is to be appreciated that they could be applied with suitable modification to any engine having one or more pairs of cylinder by providing a pair of secondary windings for each pair of cylinders.
  • the two spark plugs of each cylinder are energised without the necessity of providing a complicated distributor. Because a distributor is not provided, the high voltage leads to the spark plug can be kept short thereby minimising the radio frequency interference which is associated with high voltage leads and wet weather ignition problems which are also associated with such leads.

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)
EP86301914A 1985-03-27 1986-03-17 Système d'allumage Expired EP0201173B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8507990 1985-03-27
GB858507990A GB8507990D0 (en) 1985-03-27 1985-03-27 Ignition system

Publications (2)

Publication Number Publication Date
EP0201173A1 true EP0201173A1 (fr) 1986-11-12
EP0201173B1 EP0201173B1 (fr) 1989-07-05

Family

ID=10576748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86301914A Expired EP0201173B1 (fr) 1985-03-27 1986-03-17 Système d'allumage

Country Status (4)

Country Link
EP (1) EP0201173B1 (fr)
DE (1) DE3664226D1 (fr)
GB (1) GB8507990D0 (fr)
MY (1) MY100926A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200196A2 (fr) * 1985-04-30 1986-11-05 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Dispositif d'allumage sans rupteur
EP0346295A1 (fr) * 1988-06-06 1989-12-13 FIAT AUTO S.p.A. Système d'allumage à étincelles multiples pour moteurs à combustion interne, particulièrement pour véhicules à moteur
WO1991014867A1 (fr) * 1990-03-23 1991-10-03 Robert Bosch Gmbh Dispositif de commande d'allumage electronique avec deux bougies d'allumage par chambre de combustion
DE4323429A1 (de) * 1992-07-13 1994-01-20 Mitsubishi Electric Corp Zündsystem für eine Brennkraftmaschine mit inneren Verbrennung

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242916A (en) * 1962-09-04 1966-03-29 Pal Magneton Igntion system for internal combustion engine
US4203404A (en) * 1978-03-13 1980-05-20 Texaco Inc. Distributorless ignition method and system for a multicylinder internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242916A (en) * 1962-09-04 1966-03-29 Pal Magneton Igntion system for internal combustion engine
US4203404A (en) * 1978-03-13 1980-05-20 Texaco Inc. Distributorless ignition method and system for a multicylinder internal combustion engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 210 (M-166)[1088], 22nd October 1982; & JP - A - 57 116 163 (HANSHIN ELECTRIC K.K.) 20-07-1982 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0200196A2 (fr) * 1985-04-30 1986-11-05 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Dispositif d'allumage sans rupteur
EP0200196A3 (en) * 1985-04-30 1987-05-27 Bayerische Motoren Werke Aktiengesellschaft Contactless ignition device
EP0346295A1 (fr) * 1988-06-06 1989-12-13 FIAT AUTO S.p.A. Système d'allumage à étincelles multiples pour moteurs à combustion interne, particulièrement pour véhicules à moteur
US4958616A (en) * 1988-06-06 1990-09-25 Fiat Auto S.P.A. Multiple-spark ignition system for internal combustion engines, particularly for motor vehicles
WO1991014867A1 (fr) * 1990-03-23 1991-10-03 Robert Bosch Gmbh Dispositif de commande d'allumage electronique avec deux bougies d'allumage par chambre de combustion
DE4323429A1 (de) * 1992-07-13 1994-01-20 Mitsubishi Electric Corp Zündsystem für eine Brennkraftmaschine mit inneren Verbrennung
DE4323429C2 (de) * 1992-07-13 1998-07-30 Mitsubishi Electric Corp Zündsystem für einen Verbrennungsmotor mit mehreren Zylindern

Also Published As

Publication number Publication date
MY100926A (en) 1991-05-31
EP0201173B1 (fr) 1989-07-05
GB8507990D0 (en) 1985-05-01
DE3664226D1 (en) 1989-08-10

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