EP0209968A1 - Vorwärmsteuerungsgerät für einen Motor - Google Patents

Vorwärmsteuerungsgerät für einen Motor Download PDF

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Publication number
EP0209968A1
EP0209968A1 EP86303812A EP86303812A EP0209968A1 EP 0209968 A1 EP0209968 A1 EP 0209968A1 EP 86303812 A EP86303812 A EP 86303812A EP 86303812 A EP86303812 A EP 86303812A EP 0209968 A1 EP0209968 A1 EP 0209968A1
Authority
EP
European Patent Office
Prior art keywords
actuating means
devices
current
temperature
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.)
Withdrawn
Application number
EP86303812A
Other languages
English (en)
French (fr)
Inventor
John Kenneth Price
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.)
WELLMAN MICROTECHNOLOGY Ltd
Original Assignee
WELLMAN MICROTECHNOLOGY 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
Application filed by WELLMAN MICROTECHNOLOGY Ltd filed Critical WELLMAN MICROTECHNOLOGY Ltd
Publication of EP0209968A1 publication Critical patent/EP0209968A1/de
Withdrawn legal-status Critical Current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
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/025—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs with means for determining glow plug temperature or glow plug resistance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
    • F02P19/022—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls using intermittent current supply

Definitions

  • This invention relates to the control and operation of electrically powered pre-heating devices, for example glow plugs, used to facilitate start-up from cold of diesel or other compression ignition engines.
  • electrically powered pre-heating devices for example glow plugs
  • the object of the invention is to provide actuating means for preheating devices, particularly the last mentioned fast acting non-self-limiting glow plugs, which are simple and reliable in operation and which give speedy start-up of the engine from cold without any substantial risk of burning out or overloading the heating devices.
  • actuating means for one or more electrically powered preheating devices (10) used to facilitate start-up from cold of a compression ignition engine characterised by switching means (12) through which a circuit (11) supplying power to the device or devices is operatively connected; current sensing means (14) for monitoring the level of current being taken by the device or devices in use, said current level being a function of the temperature at which the device or devices are operating; comparator means (18) connected to an output from said sensing means for determining whether or not a value representing said current exceeds a predetermined threshhold value; and timing means (20) controlled by an output from the comparator means and operating to actuate said switching means to pass current to the device or devices for successive spaced limited predetermined periods only while the device or devices are above a predetermined temperature to avoid overheating but permitting the device or devices to operate continuously while below said temperature.
  • the or each preheating device is a fast acting non-self-limiting glow plug.
  • the switching means is conveniently a relay operated by a circuit of the actuating means, and the timing means is an oscillator operating to generate on/off pulses of predetermined frequency and duration.
  • the overriding control means may include overriding timing means disabling the actuating means after a predetermined period from initiation of its operation if the engine is not started during that period.
  • the controller is shown connected into the electrical circuit of a passenger car or other vehicle having a diesel or other compression ignition engine.
  • the engine has fast acting non-self-limiting glow plugs 10 each in a respective cylinder in known manner (two only shown in the diagram) which are powered from the battery of the vehicle through a lead 11 by way of switching contacts 12 of a relay 13 referred to further hereafter.
  • Lead 11 is also connected through a current sensing unit 14 of known kind arranged in parallel with a shunt resistor 15.
  • a second lead 16 from the battery is connected through an indicator light 17 to the operating circuit of the controller now described.
  • Sensing means 14 operates to monitor the current passing to plugs 10, the current level being a function of the temperature at which they are operating; as the temperature rises the current level falls. Output from sensing device 14 is applied to a comparator 18 which provides an output signal dependent on whether or not the sensed current is above or below a predetermined threshhold level representing the safe operating temperature of the plugs at which optimum heating effect is obtained without risk of their burning out or becoming damaged through overloading.
  • the controller further includes timing means in the form of an oscillator 20 which, in this example, provides on/off pulses each of 0.1 seconds duration at intervals of 0.5 seconds, the output from the oscillator controlling the operation of relay 13.
  • timing means in the form of an oscillator 20 which, in this example, provides on/off pulses each of 0.1 seconds duration at intervals of 0.5 seconds, the output from the oscillator controlling the operation of relay 13.
  • comparator 18 releases oscillator 20 freeing it to generate the pulsed on/off output which turns off relay 13 except during each brief 0.1 second on period.
  • the application of current to the plugs 10 enables the sensing unit 14 to sample their temperature as a function of the current level, if they have cooled below the threshhold e.g. because an attempt to start the engine has been delayed, pulsing will cease and relay 13 will be continuously switched on to bring the plugs back to heat. If the sampling indicates that the plugs are still at the safe maximum heat then the pulsing continues, the brief on period not being long enough to cause them to overheat or become damaged.
  • a second timer (23) is provided to cut off totally the current to the plugs after about 90 seconds. This timeout is reset on selecting ignition (21) and startup (22).
  • Time of (23) depends on the ambient temperature.
  • the invention provides a simple, speedy and reliable facility for starting diesel type engines from cold which can be controlled and operated so far as is apparent to a user of the vehicle, e.g. a private car, in an almost identical fashion to and at substantially the same speed as the familiar procedures for switching on and starting up from cold a petrol fuelled engine with electrical ignition.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP86303812A 1985-05-24 1986-05-20 Vorwärmsteuerungsgerät für einen Motor Withdrawn EP0209968A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858513221A GB8513221D0 (en) 1985-05-24 1985-05-24 Engine preheat controller
GB8513221 1985-05-24

Publications (1)

Publication Number Publication Date
EP0209968A1 true EP0209968A1 (de) 1987-01-28

Family

ID=10579654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86303812A Withdrawn EP0209968A1 (de) 1985-05-24 1986-05-20 Vorwärmsteuerungsgerät für einen Motor

Country Status (2)

Country Link
EP (1) EP0209968A1 (de)
GB (1) GB8513221D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0288085A2 (de) * 1987-04-24 1988-10-26 BERU Ruprecht GmbH & Co. KG Verfahren und Vorrichtung zum Schnellaufheizen einer elektrischen Heizvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743059A1 (de) * 1977-09-24 1979-04-05 Beru Werk Ruprecht Gmbh Co A Verfahren und anordnung zum schnellaufheizen von gluehkerzen
JPS5870060A (ja) * 1981-10-21 1983-04-26 Hitachi Ltd 予熱ヒ−タ制御装置
JPS59105971A (ja) * 1982-12-10 1984-06-19 Toyota Motor Corp デイ−ゼルエンジン用グロ−プラグの制御方法
JPS59141770A (ja) * 1983-02-02 1984-08-14 Toyota Motor Corp デイ−ゼルエンジンのグロ−プラグ通電制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2743059A1 (de) * 1977-09-24 1979-04-05 Beru Werk Ruprecht Gmbh Co A Verfahren und anordnung zum schnellaufheizen von gluehkerzen
JPS5870060A (ja) * 1981-10-21 1983-04-26 Hitachi Ltd 予熱ヒ−タ制御装置
JPS59105971A (ja) * 1982-12-10 1984-06-19 Toyota Motor Corp デイ−ゼルエンジン用グロ−プラグの制御方法
JPS59141770A (ja) * 1983-02-02 1984-08-14 Toyota Motor Corp デイ−ゼルエンジンのグロ−プラグ通電制御装置

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 7, no. 163 (M-229)[1308], 16th July 1983; & JP - A - 58 70 060 (HITACHI SEISAKUSHO K.K.) 26-04-1983 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 224 (M-331)[1661], 13th October 1984; & JP - A - 59 105 971 (TOYOTA JIDOSHA K.K.) 19-06-1984 *
PATENTS ABSTRACTS OF JAPAN, vol. 8, no. 270 (M-344)[1707], 11th December 1984; & JP - A - 59 141 770 (TOYOTA JIDOSHA K.K.) 14-08-1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0288085A2 (de) * 1987-04-24 1988-10-26 BERU Ruprecht GmbH & Co. KG Verfahren und Vorrichtung zum Schnellaufheizen einer elektrischen Heizvorrichtung
EP0288085A3 (en) * 1987-04-24 1989-01-18 Beru Ruprecht Gmbh & Co. Kg Method and means for fast heating of electric heating device

Also Published As

Publication number Publication date
GB8513221D0 (en) 1985-06-26

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Inventor name: PRICE, JOHN KENNETH