WO1994008133A1 - Zündanlage mit variabler primärspannungsbegrenzung und fehlerdiagnose - Google Patents
Zündanlage mit variabler primärspannungsbegrenzung und fehlerdiagnose Download PDFInfo
- Publication number
- WO1994008133A1 WO1994008133A1 PCT/DE1993/000817 DE9300817W WO9408133A1 WO 1994008133 A1 WO1994008133 A1 WO 1994008133A1 DE 9300817 W DE9300817 W DE 9300817W WO 9408133 A1 WO9408133 A1 WO 9408133A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- ignition
- primary
- ignition system
- load
- 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
- F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
- F02P17/12—Testing characteristics of the spark, ignition voltage or current
-
- 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
- F02P3/055—Layout of circuits with protective means to prevent damage to the circuit, e.g. semiconductor devices or the ignition coil
- F02P3/0552—Opening or closing the primary coil circuit with semiconductor devices
- F02P3/0554—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
Definitions
- the invention relates to an ignition system for internal combustion engines according to the preamble of the main claim.
- Such an ignition system is already known from DE-OS 23 39 896.
- a connection with an element of certain breakdown voltage is routed to the control electrode of the switching transistor in the primary circuit between the primary winding and the switching path of the ignition transistor. If the voltage exceeds the permissible value when the switching path of the ignition transistor changes to the non-conductive state, the voltage at the element of certain breakdown voltage breaks through and a control current begins to flow via the control path of the ignition transistor. which again makes the emitter-collector path of the ignition transistor somewhat current-permeable.
- the arrangement according to the invention with the characterizing features of the main claim has the advantage over and above that, by adapting the primary voltage generation of the output stages to the respective secondary load, there is no excessive voltage on the igniter at low load or no excess voltage at high load.
- This primary-side detection of the ignition voltage supply on the secondary side of the ignition coil also has the advantage that it can be used during normal engine operation for diagnostic evaluation to identify possible faults in the ignition system.
- a flat rise in the secondary voltage is an indication that the spark plug has shunts. If, on the other hand, the detected spark duration is shorter than a limit value or if the burning voltage curve typical for combustion is missing, then for example an ignitable mixture or possibly an ignition spark on the spark plug is missing due to a dropped plug connector.
- the actual high voltage offer is e.g. by pulling out a spark plug connector and taking appropriate measurements, but this cannot be used when the internal combustion engine is operating.
- the evaluation as described above offers a simple way of detecting the ignition voltage.
- FIG. 1 shows the basic structure for a variable power amplifier
- FIG. 2 shows the relationship between the secondary load and the gradient of the primary voltage in table form
- FIG. 3 shows a structure graph for recording and evaluating the primary voltage. Description of the embodiment
- FIG. 1 shows an ignition device in an internal combustion engine, not shown.
- the primary winding 1 of the ignition coil 2 is connected on the one hand to the supply voltage U and on the other hand via the collector-emitter path of the ignition transistor 3 and a resistor 4 to ground.
- a load acts on the secondary winding 5 of the ignition coil 2, which is represented here as an equivalent circuit diagram by the parallel connection of a capacitor 6 and a resistor 7.
- a tap 8 is provided between the primary winding 1 and the ignition transistor 3, so that the primary voltage U is evaluated in an evaluation unit 9, the rise in the primary voltage U when a trigger pulse is triggered being a measure of the secondary load is.
- Another tap 14 between the primary winding and the ignition transistor 3 is connected to the control input of a transistor 12 via a resistor 10 and a Zener diode 11.
- the collector of transistor 12 is connected to a 5 volt supply voltage via a resistor 15, while the emitter of transistor 12 is connected to a connection between a control terminal 13 for the ignition signal and the control input of ignition transistor 3.
- a third transistor 16 is connected on the collector side to the connection between the resistor 10 and the Zener diode 11 and is connected to ground on the emitter side. The control input of this third transistor 16 is connected to the evaluation unit 9.
- the ignition system just described has the following mode of operation.
- the ignition transistor 3 is initially controlled into the conductive state via the control connection 13, so that current flows through the primary winding 1 of the ignition coil 2.
- the ignition transistor 3 comes into the non-conductive state, which means an interruption in the current flow in the primary winding 1 of the ignition coil 2 and a high-voltage surge dependent on it in the secondary winding 5 results. This would then lead to an ignition spark on the secondary side of a spark plug, not shown.
- the voltage at the zener diode 11 breaks through and a control current is present at the control input of the transistor 12, so that a control current at the ignition transistor 3 also causes this transistor to react somewhat makes current permeable.
- the voltage across the switching path of the ignition transistor 3 immediately drops again, to the extent that the voltage across the Zener diode 11 falls below the breakdown voltage of this Zener diode.
- the primary voltage U is detected in the evaluation unit 9 and evaluated in such a way that the voltage building up on the zener diode 11 can be varied by driving the transistor 16, ie the transistor 16 forms an adjustable resistor 10 Voltage divider, the voltage applied to the center of the adjustable voltage divider corresponding to the voltage applied to the zener diode 11.
- the voltage potential applied to the zener diode is changed.
- the rise time tr of the primary voltage U up to a predetermined value is evaluated in the evaluation unit 9. A large capacitive load on the secondary side causes a longer rise time tr than with a small capacitive load.
- FIG. 2 shows the relationship between the secondary load and the rise time tr of the primary voltage.
- the table in FIG. 2 is divided into two areas, area a) for larger loads in the secondary circuit and area b) for smaller loads. These areas differ in that two different loads were used for the measurement.
- the table also shows the rise time tr, which corresponds to the time when the primary voltage rose from 0 to 200 V, the voltage change dU (during 25 us) and the voltage change dU (during 50 us).
- This table in FIG. 2 clearly shows that with the load acting under a (cf. the values for C-6 and J-7) a much longer rise time tr elapses until the primary voltage reaches 200 volts than for the under Figure b indicated load. It can be clearly seen that there is a direct connection between the rise time and the secondary load. This relationship is evaluated in the evaluation unit 9 and the transistor 16 is controlled accordingly.
- the evaluation unit 9 detecting the voltage change dU after a predeterminable time (for example 25 us or 50 us). It can also be seen here from FIG. 2 that the voltage potential in part b) of the table after the same time at a lower load is substantially greater than the voltage potential in part a) of the table.
- FIG. 3 shows a possibility of evaluating the detected primary voltage U.
- the primary voltage U as already described for FIG. 1, is recorded in a work step 20, wherein, for example, either the rise time tr until the 200 V primary voltage U is reached or the primary voltage U reached can be evaluated after a predeterminable time.
- the detected primary voltage U is evaluated as a measure of the attacking secondary load, for example by evaluating the rise time until it reaches 200 V and in step 22 the clamp voltage as described in relation to FIG. 1 is determined by a corresponding control of the transistor 16.
- step 23 the detected primary voltage is compared with reference values U of the spark duration and / or the operating voltage curve REF.
- query 24 it is now checked whether the detected
- the evaluated ignition is recognized as correct in step 25.
- a no to question 24 leads to work step 26, in which the ignition that has taken place is evaluated as faulty, it being possible at the same time to divide it into different types of fault based on the evaluated operating voltage.
- a lack of overshoot when the ignition breaks down or a flat rise in voltage indicates shunts on the spark plug.
- An error display signal is now output in step 27 and the subsequent combustion is evaluated in step 28.
- the evaluation unit 9 in FIG. 1 it is possible, for example, if the increase in the primary voltage and the conclusion on possible shunts is too small, to increase the supply of secondary voltage by means of a corresponding brackets U, so that L causes the spark plug to burn out.
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)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50856894A JP3402608B2 (ja) | 1992-10-02 | 1993-09-08 | 内燃機関のための点火装置 |
EP93918954A EP0615580B1 (de) | 1992-10-02 | 1993-09-08 | Zündanlage mit variabler primärspannungsbegrenzung und fehlerdiagnose |
US08/244,445 US5446385A (en) | 1992-10-02 | 1993-09-08 | Ignition system for internal combustion engines |
DE59306600T DE59306600D1 (de) | 1992-10-02 | 1993-09-08 | Zündanlage mit variabler primärspannungsbegrenzung und fehlerdiagnose |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4233211.7 | 1992-10-02 | ||
DE4233211 | 1992-10-02 | ||
DE4315999A DE4315999A1 (de) | 1992-10-02 | 1993-05-13 | Zündanlage für Brennkraftmaschinen |
DEP4315999.0 | 1993-05-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994008133A1 true WO1994008133A1 (de) | 1994-04-14 |
Family
ID=25919137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1993/000817 WO1994008133A1 (de) | 1992-10-02 | 1993-09-08 | Zündanlage mit variabler primärspannungsbegrenzung und fehlerdiagnose |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0615580B1 (de) |
JP (1) | JP3402608B2 (de) |
DE (2) | DE4315999A1 (de) |
ES (1) | ES2102671T3 (de) |
WO (1) | WO1994008133A1 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2265344A1 (de) * | 1971-06-01 | 1977-11-03 | Chrysler Corp | Zuendschaltung fuer eine rein induktive zuendeinrichtung bei brennkraftmaschinen |
DE2842923A1 (de) * | 1977-09-30 | 1979-04-19 | Hitachi Ltd | Transistorisierte zuendanlage |
DE2811149A1 (de) * | 1978-03-15 | 1979-09-20 | Bosch Gmbh Robert | Elektrischer stromkreis mit einem schalttransistor und mit einem induktiven widerstand, insbesondere mit der primaerwicklung einer zu einer brennkraftmaschine gehoerenden zuendspule |
EP0040260A1 (de) * | 1980-05-20 | 1981-11-25 | TELEFUNKEN electronic GmbH | Transistor-Zündschaltung |
JPS60147571A (ja) * | 1984-01-12 | 1985-08-03 | Toshiba Corp | 点火装置 |
US4913123A (en) * | 1989-03-23 | 1990-04-03 | Ford Motor Company | Ignition timing system with feedback correction |
-
1993
- 1993-05-13 DE DE4315999A patent/DE4315999A1/de not_active Withdrawn
- 1993-09-08 WO PCT/DE1993/000817 patent/WO1994008133A1/de active IP Right Grant
- 1993-09-08 ES ES93918954T patent/ES2102671T3/es not_active Expired - Lifetime
- 1993-09-08 DE DE59306600T patent/DE59306600D1/de not_active Expired - Fee Related
- 1993-09-08 JP JP50856894A patent/JP3402608B2/ja not_active Expired - Fee Related
- 1993-09-08 EP EP93918954A patent/EP0615580B1/de not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2265344A1 (de) * | 1971-06-01 | 1977-11-03 | Chrysler Corp | Zuendschaltung fuer eine rein induktive zuendeinrichtung bei brennkraftmaschinen |
DE2842923A1 (de) * | 1977-09-30 | 1979-04-19 | Hitachi Ltd | Transistorisierte zuendanlage |
DE2811149A1 (de) * | 1978-03-15 | 1979-09-20 | Bosch Gmbh Robert | Elektrischer stromkreis mit einem schalttransistor und mit einem induktiven widerstand, insbesondere mit der primaerwicklung einer zu einer brennkraftmaschine gehoerenden zuendspule |
EP0040260A1 (de) * | 1980-05-20 | 1981-11-25 | TELEFUNKEN electronic GmbH | Transistor-Zündschaltung |
JPS60147571A (ja) * | 1984-01-12 | 1985-08-03 | Toshiba Corp | 点火装置 |
US4913123A (en) * | 1989-03-23 | 1990-04-03 | Ford Motor Company | Ignition timing system with feedback correction |
Non-Patent Citations (2)
Title |
---|
M. G. MCDERMOTT: "IGNITION COIL SECONDARY CLAMPING CIRCUIT", RESEARCH DISCLOSURE, vol. 292, no. 98, August 1988 (1988-08-01), NEW YORK, NY, USA, pages 637, XP000031709 * |
PATENT ABSTRACTS OF JAPAN vol. 9, no. 313 (M - 437) 10 December 1985 (1985-12-10) * |
Also Published As
Publication number | Publication date |
---|---|
DE4315999A1 (de) | 1994-04-07 |
JPH07501599A (ja) | 1995-02-16 |
DE59306600D1 (de) | 1997-07-03 |
ES2102671T3 (es) | 1997-08-01 |
EP0615580B1 (de) | 1997-05-28 |
JP3402608B2 (ja) | 2003-05-06 |
EP0615580A1 (de) | 1994-09-21 |
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