WO2001023756A1 - Verfahren und zeitschaltung zur erzeugung eines schalt- oder steuersignals - Google Patents
Verfahren und zeitschaltung zur erzeugung eines schalt- oder steuersignals Download PDFInfo
- Publication number
- WO2001023756A1 WO2001023756A1 PCT/EP2000/009457 EP0009457W WO0123756A1 WO 2001023756 A1 WO2001023756 A1 WO 2001023756A1 EP 0009457 W EP0009457 W EP 0009457W WO 0123756 A1 WO0123756 A1 WO 0123756A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- current
- voltage
- inductance
- ignition coil
- ignition
- 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
- F02P3/00—Other installations
- F02P3/02—Other installations having inductive energy storage, e.g. arrangements of induction coils
- F02P3/04—Layout of circuits
- F02P3/045—Layout of circuits for control of the dwell or anti dwell time
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/2017—Output circuits, e.g. for controlling currents in command coils using means for creating a boost current or using reference switching
-
- 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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
- F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
- F02D2041/2031—Control of the current by means of delays or monostable multivibrators
Definitions
- the invention relates to a method and a time circuit for generating a switching or control signal after a predeterminable period of time.
- Time circuits for switching off a consumer are usually constructed as so-called RC circuits with an RC element that serves as a time element.
- the ignition coil is switched off in such a way that there is no longer a spark at the spark plug if the control system works incorrectly.
- the ignition coil can be switched off, for example, if a maximum temperature is exceeded in the electronic switch which switches the ignition coil on and off.
- the switch-on and switch-off times are in a range from approximately 10 ms to 50 ms.
- a time switch is suitable for switching off the ignition coil.
- an RC circuit can be used for this, but it has the disadvantage that the capacitor cannot be integrated on a chip, but must be provided as an external component.
- Another solution that can be integrated provides for the use of an oscillator and several binary divider stages. Although this solution has the advantage that all components can be integrated, it requires a lot of circuitry. It is therefore an object of the invention to provide a method and a time circuit for generating a switching or control signal after a predeterminable time period, in particular for switching off the ignition coil of an electronic ignition system, which can be integrated without high circuit complexity.
- the method according to the invention achieves this object according to claim 1 in that a voltage is applied to an inductor at the start of the time measurement and in that the current threshold value detector emits the switching or control signal when the current through the inductor exceeds a predetermined threshold value.
- an inductance is provided as a timing element.
- the increase in the current through the inductance is detected by a current threshold detector which, when an adjustable and predeterminable threshold value is exceeded, emits a switching or control signal which, for example, can switch a consumer on or off.
- the method according to the invention can be used particularly advantageously in an electronic ignition system of an internal combustion engine, because the ignition coil, which is present anyway, can serve as a timing element.
- the current through the inductance is detected by means of a measuring resistor, to the terminals of which a voltage threshold detector is connected.
- the voltage drop and the current rise at the inductance are measured and logically linked to one another in a logic circuit arrangement.
- the logical circuit arrangement generates the switching or control signal.
- a third exemplary embodiment of the method according to the invention is used in an electronic ignition system of an internal combustion engine.
- the current threshold value detector or voltage threshold value detector or the logic circuit arrangement already mentioned controls the electronic switch of the electronic ignition system, which switches the ignition coil on and off. After the predetermined period of time, the current threshold value detector, the voltage threshold value detector or the logic circuit arrangement emits a switching signal for switching off the ignition coil.
- Em fourth exemplary embodiment of the method according to the invention provides, when used in an electronic ignition system for an internal combustion engine, that the current through the ignition coil is switched off in the event of a short circuit on the ignition coil.
- Fig. 2 shows a second exemplary embodiment of a time switch according to the invention and Fig. 3 e third an electronic ignition system for an internal combustion engine from an exemplary embodiment of a time switch according to the invention.
- a circuit contains a voltage source U, an controllable switch S, an inductor L and an current threshold detector ID with a control output.
- the timer is switched on by closing the controllable switch S, which can be actuated, for example, by a control circuit. If the current I through the inductance L exceeds a predeterminable and adjustable threshold value, the current threshold value detector ID emits a switching or control signal at its output, which can be used, for example, to control or switch on and off a consumer.
- the control output of the current threshold detector ID is connected to the control input of the controllable switch S, which switches the inductance L - the ignition coil - on and off.
- the measuring resistor R and the voltage threshold detector UD1 form the current threshold detector ID.
- the second exemplary embodiment can also be used in an electronic ignition system.
- the control output of the voltage threshold detector UD1 is connected to the control input of the controllable switch S, which switches the ignition coil L on and off.
- the one connection of the primary winding PW of the ignition coil L is connected to the one pole of the voltage source U - the vehicle battery - and the first input of a voltage threshold value detector UD2.
- the second connection of the primary winding PW of the ignition coil L is connected to the second input of the voltage threshold detector UD2 and to the collector of a field effect transistor T, which represents the controllable switch S.
- the first emitter of the field effect transistor T is connected via the measuring resistor R to its gate electrode, to the first output AI of a logic circuit LS, to the third input of the second voltage threshold detector UD2 and to the other pole of the voltage source U.
- One connection of the measuring resistor R is connected to the first input of a voltage threshold detector UD1 and the other connection of the measuring resistor R is connected to the second input of the voltage threshold detector UDl, the output of which is connected to the first input of the logic circuit LS.
- the output of the voltage threshold detector UD2 is connected to the second input of the logic circuit LS, the second output A2 of which is connected to the gate electrode of the field effect transistor T. is.
- a second emitter of the field effect transistor T is parallel to the first emitter of the field effect transistor T and to the measuring resistor R.
- a zener diode Z is connected in parallel to the gate electrode and to the emitter of the field effect transistor T.
- a so-called insulated gate bipolar transistor is preferably used for the field effect transistor T.
- the current through the primary winding PW of the ignition coil L is switched on and off cyclically by means of the field effect transistor T in order to generate an ignition spark at the right moment in the spark plugs connected to the secondary winding SW of the ignition coil L.
- the field effect transistor T is conductive, the current I through the primary coil PW of the ignition coil L increases linearly. According to the invention, the linear increase in current I is used for time measurement.
- the field effect transistor T is switched on and off cyclically so that the ignition coil supplies the ignition voltage required for the spark plugs at the right moment. If no ignition spark is generated due to a fault at the time of ignition, the current I through the primary winding PW of the ignition coil L continues to increase linearly. In order to prevent the ignition coil from being destroyed by too high a current, the field effect transistor T is controlled by the logic circuit LS from the conductive state to the non-conductive state so slowly that the differential quotient dl / dt of the current flowing through the primary winding PW of the ignition coil L is so remains small that the ignition voltage induced on the secondary winding SW of the ignition coil L is no longer sufficient to generate an ignition spark on the spark plugs.
- the voltage drop across the measuring resistor R which is proportional to the current I flowing through the primary winding PW of the ignition coil L, is detected by means of the voltage threshold detector UD1.
- the voltage drop across the collector-emitter path of the field effect transistor T is detected by means of the voltage threshold detector UD2.
- the threshold value set in the voltage threshold detector UD1 is chosen to be larger than the value of the voltage drop across the measuring resistor R at the point of ignition. With trouble-free operation, the value set in the voltage threshold detector UD1 is therefore never reached.
- the current I through the primary coil PW and thus the voltage drop across the measuring resistor R in the event of a fault rises above the threshold value set in the voltage threshold value detector UD1.
- the voltage across the collector-emitter path of the field effect transistor T which is detected by means of the voltage threshold detector UD2, drops below the collector-emitter saturation voltage.
- the collector-emitter voltage of the field effect transistor T is significantly higher than the saturation voltage, which is caused by the voltage threshold detector UD2 is detected. If the collector-emitter voltage of the field effect transistor T is significantly higher than the saturation voltage, the voltage threshold value detector UD2 em outputs a control signal to the logic circuit LS, which then immediately controls the field effect transistor T into the non-conductive state.
- the current through the primary winding PW of the ignition coil L can be switched off immediately, because in this case no voltage is induced in the secondary winding SW of the ignition coil L and therefore no ignition spark can be generated.
- an inductance is provided as a timing element in the method according to the invention and in the time switching according to the invention, neither an RC element nor an oscillator with subsequent bar divider stages is required.
- the invention is therefore particularly suitable for an electronic ignition system because an electronic ignition system contains an inductance - the ignition coil - which performs a double function anyway. It generates the ignition voltage and also serves as a timing element.
- the invention is particularly well suited for circuit arrangements or systems in which an inductor is provided, which can then also be used as a timing element.
- the invention is in no way limited to such circuits or systems with an already existing inductance. It can be used to advantage wherever relatively long times have to be measured. If an inductance does not already exist in the field of application and can be used as a timing element, an inductance must be provided as a timing element.
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)
- Electronic Switches (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001527114A JP2003510519A (ja) | 1999-09-30 | 2000-09-27 | 切換信号または制御信号を形成する方法および時間回路 |
EP00967808A EP1216356B1 (de) | 1999-09-30 | 2000-09-27 | Verfahren und zeitschaltung zur erzeugung eines schalt- oder steuersignals |
US09/997,984 US6734676B2 (en) | 1999-09-30 | 2001-11-29 | Method and timing circuit for generating a switching or control signal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19946994.6 | 1999-09-30 | ||
DE19946994A DE19946994C2 (de) | 1999-09-30 | 1999-09-30 | Verfahren und Zeitschaltung zur Erzeugung eines Schalt- oder Steuersignales |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/997,984 Continuation US6734676B2 (en) | 1999-09-30 | 2001-11-29 | Method and timing circuit for generating a switching or control signal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001023756A1 true WO2001023756A1 (de) | 2001-04-05 |
Family
ID=7923933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2000/009457 WO2001023756A1 (de) | 1999-09-30 | 2000-09-27 | Verfahren und zeitschaltung zur erzeugung eines schalt- oder steuersignals |
Country Status (5)
Country | Link |
---|---|
US (1) | US6734676B2 (de) |
EP (1) | EP1216356B1 (de) |
JP (1) | JP2003510519A (de) |
DE (1) | DE19946994C2 (de) |
WO (1) | WO2001023756A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004034865A1 (de) | 2004-07-19 | 2006-02-16 | Siemens Ag | Sensor zur Messung der Position eines Stellgliedes |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2141483A (en) * | 1983-06-16 | 1984-12-19 | Bosch Gmbh Robert | Dwell and rest coil current control in IC engine ignition units |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3003892A1 (de) | 1980-02-02 | 1981-08-13 | Robert Bosch Gmbh, 7000 Stuttgart | Druckabhaengige verstellung von betriebsparametern von brennkraftmaschinen |
US5548471A (en) * | 1994-07-25 | 1996-08-20 | Webster Heating And Specialty Products, Inc. | Circuit and method for spark-igniting fuel |
US5745352A (en) * | 1994-10-27 | 1998-04-28 | Sgs-Thomson Microelectronics S.R.L. | DC-to-DC converter functioning in a pulse-skipping mode with low power consumption and PWM inhibit |
JP3299409B2 (ja) * | 1995-03-31 | 2002-07-08 | 三菱電機株式会社 | 内燃機関用点火装置 |
US6006156A (en) * | 1997-12-11 | 1999-12-21 | Cummins Engine Company, Inc. | Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine |
US6166927A (en) * | 1999-07-23 | 2000-12-26 | Ericsson Inc. | Push-pull power converter circuit |
US6505605B2 (en) * | 2000-03-29 | 2003-01-14 | Ngk Spark Plug Co., Ltd. | Control system for an internal combustion engine and method carried out by the same |
-
1999
- 1999-09-30 DE DE19946994A patent/DE19946994C2/de not_active Expired - Fee Related
-
2000
- 2000-09-27 EP EP00967808A patent/EP1216356B1/de not_active Expired - Lifetime
- 2000-09-27 WO PCT/EP2000/009457 patent/WO2001023756A1/de active IP Right Grant
- 2000-09-27 JP JP2001527114A patent/JP2003510519A/ja not_active Abandoned
-
2001
- 2001-11-29 US US09/997,984 patent/US6734676B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2141483A (en) * | 1983-06-16 | 1984-12-19 | Bosch Gmbh Robert | Dwell and rest coil current control in IC engine ignition units |
Also Published As
Publication number | Publication date |
---|---|
EP1216356B1 (de) | 2003-06-04 |
DE19946994A1 (de) | 2001-04-05 |
EP1216356A1 (de) | 2002-06-26 |
US20020075014A1 (en) | 2002-06-20 |
US6734676B2 (en) | 2004-05-11 |
JP2003510519A (ja) | 2003-03-18 |
DE19946994C2 (de) | 2001-09-13 |
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