EP0448566B1 - Verfahren zur steuerung der zündung einer brennkraftmaschine - Google Patents

Verfahren zur steuerung der zündung einer brennkraftmaschine Download PDF

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Publication number
EP0448566B1
EP0448566B1 EP89912393A EP89912393A EP0448566B1 EP 0448566 B1 EP0448566 B1 EP 0448566B1 EP 89912393 A EP89912393 A EP 89912393A EP 89912393 A EP89912393 A EP 89912393A EP 0448566 B1 EP0448566 B1 EP 0448566B1
Authority
EP
European Patent Office
Prior art keywords
ignition
coil
charging
counter
counting means
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.)
Expired - Lifetime
Application number
EP89912393A
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German (de)
English (en)
French (fr)
Other versions
EP0448566A1 (de
Inventor
Jürgen Zimmermann
Bernard Bauer
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0448566A1 publication Critical patent/EP0448566A1/de
Application granted granted Critical
Publication of EP0448566B1 publication Critical patent/EP0448566B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F02P3/0453—Opening or closing the primary coil circuit with semiconductor devices
    • F02P3/0456—Opening or closing the primary coil circuit with semiconductor devices using digital techniques
    • 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
    • F02P7/035—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors with electrical means without mechanical switching means

Definitions

  • the invention relates to a method for controlling the ignition of an internal combustion engine according to the preamble of claim 1 and a control device for controlling the ignition of an internal combustion engine according to the preamble of claim 8.
  • the individual spark plugs are controlled via a distributor. If the internal combustion engine has many cylinders, and at high speeds, the closing angle is often no longer sufficient to sufficiently charge the coil.
  • the method for controlling an internal combustion engine with the features listed in claim 1 has the advantage that with a relatively simple control unit, in particular, internal combustion engines with more than 6 cylinders can be controlled without problems even at very high speeds. It is particularly advantageous that only a first counting means or first counter for the ignition timing and a second counting means or a second counter for the start of the charging process of the ignition coils are required for all ignition coils. Although not every individual ignition coil is assigned its own counter, a closing angle overlap can be easily implemented.
  • the counter reading of the second counter is gradually reduced depending on an angle-dependent clock signal.
  • An initial value corresponding to the next ignition coil to be charged is entered into the second counter.
  • the loading process of this coil is initiated as soon as the counter reading of the second counter assumes the value ZERO.
  • the start of the charging process can thus be controlled by selecting the initial value. It also shows that this type of control is particularly easy to carry out.
  • the control device according to the invention for controlling the ignition of an internal combustion engine with the features listed in claim 6 has the advantage over known ignition control devices that it has only two counters for any number of controllable cylinders.
  • the first counter is used to trigger the ignition process and the second counter to initiate a charging process for a coil.
  • FIG. 1 shows the voltage curve at six individual spark coils of an ignition control device for an internal combustion engine with six cylinders above the crankshaft angle ⁇ .
  • the voltage curve on the coil of the sixth cylinder in FIG. 1 is arranged at the lowest point. It can be clearly seen how the voltage on the individual coils rises and drops suddenly when an associated spark plug is activated.
  • FIG. 1 is not intended to represent a realistic operating case; rather, a closing angle overlap is to be shown here, that is, the operating case in which several ignition coils are charged simultaneously. Seen from left to right, there is a closing angle overlap between the second and third coil and then again between the fifth and sixth coil. In the later course of the diagram, there is a simple overlap of the closing angle between the coils 2 and 3 and between the coils 3 and 4. Later there is a multiple overlap of the closing angle for the coils 3, 4 and 5, then for the coils 4, 5 and 6. In the further course of the crank angle ⁇ there is a further, simple closing angle overlap between the first and sixth coil.
  • the charging process In order to achieve optimal charging of the coils, the charging process must be maintained for a certain time before the spark plug is ignited. This time is essentially always constant. For the voltage profiles shown above the crankshaft angle ⁇ on the ignition coils it follows that at high speeds the charging process extends over a larger angular range than at lower speeds.
  • the angular range during which a coil is loaded is referred to as the closing angle ⁇ s . It is shown here by way of example in the voltage profile of the coil 1.
  • the ignition coils are controlled here as follows:
  • the ignition point is triggered by a first counter, which is loaded with a predetermined value at an angle-synchronous reference mark. This value is gradually reduced by an angle-synchronous clock signal until the value ZERO is reached.
  • the clock signal can be generated here, for example, with the aid of a sensor wheel which is provided with sixty teeth. The teeth are scanned by a suitable sensor. With each negative edge, a pulse, a clock signal, is sent to the counter and the counter reading is decreased by one level.
  • the starting point for the calculation can be a crankshaft-synchronous mark or the ignition point of a coil.
  • the calculation at the ignition point of the coil 1 is to be carried out as an example.
  • a second counter is used to determine the distance to the next operating state "load coil". Whenever a charging process for a coil is initiated, a new initial value is entered for the next coil to be loaded.
  • the counter reading is clocked by an angle increment, that is to say by an angle-synchronous clock signal. This will gradually reduce its counter reading.
  • the clock signal is also generated here, for example, by a sensor wheel, the negative edges of which are used to clock the counter.
  • the crank angle range until the next coil is loaded after the ignition of the preceding coil is therefore larger if a high initial value is entered in the second counter. This shortens the angular range for the charging process of this coil.
  • the second counter is loaded with an initial value A1 at the beginning of a cycle.
  • the count is successively reduced by the clock signal until the value NULL is reached.
  • the charging process the coil 1 initiated.
  • the voltage in the first coil is increased.
  • the next starting value is the value A2.
  • the charging process of the second coil is initiated.
  • the increase in voltage in the second coil is clearly evident from FIG. 1.
  • the next starting value is A3. This value corresponds to the angular distance up to the start of the charging process of the coil 3.
  • the charging process of the third coil is initiated. It can be clearly seen from Figure 1 that the voltage in the third coil increases while the second coil is still being charged. So there is a closing angle overlap here.
  • the initial value A4, then A5 and finally A6 is then entered into the second counter.
  • the various initial values A1 to A6 are stored in a suitable memory, for example in a RAM.
  • the initial values, from which it can be seen at what angular distance the charging of the next coil is initiated at the start of the charging process of one coil, are calculated in advance.
  • the initial values A1 to A6 are calculated 720 ° in advance. 720 ° correspond to one cycle.
  • n-1 closing angle overlaps can occur, where n corresponds to the number of cylinders.
  • the initial values can also be calculated at a different point in time, for example only 360 ° in advance. However, this reduces the number of possible closing angle overlaps.
  • the initial values A1, A2, ..., A6 had already been calculated and stored in a memory. It is now a matter of calculating the new initial distances A1 to A6 for the following ignition processes. This is to be done in the following using the initial value A1 for coil 1:
  • the initial value A1 is determined during the ignition process of the coil 1.
  • the initial value A2 is calculated in the ignition process of the coil 2 and so on.
  • the newly calculated initial value A1 for the coil 1 is stored in the memory for the initial values.
  • the closing angles ⁇ s of the individual coils are also stored in a suitable memory. These Values can then easily be called up for the calculation of the various initial values.
  • the second counter which counts down from a predetermined initial value in this embodiment, can also be designed to count up.
  • the start of charging a coil must be triggered when the corresponding initial value of the corresponding coil has been reached.
  • comparators are required to determine whether the second counter has reached the value ZERO or the specified initial value. If this is the case, the corresponding charging process is triggered.
  • the method is not restricted to internal combustion engines with six cylinders.
  • the number of cylinders is therefore arbitrary.
  • the method described here can be applied not only to static ignition distribution but also to so-called dual-circuit distributors or distributors with rotating systems. It can also be used with double spark coils.
  • FIG. 2 shows a block diagram of such a control.
  • an angle interrupt signal or an angle increment is generated, which is passed on to a first counter 3 and to a second counter 5.
  • the ignition timing is determined using the first counter 3. It is loaded with an initial value that is gradually reduced to ZERO when an angular reference mark is reached.
  • the ignition process is triggered in that a signal is emitted to a first pointer 7, which emits an output signal to an output stage 9 which ignites the associated spark plug.
  • the first pointer 7 outputs a signal x to a register 11 assigned to the second counter 5. This signal ensures that a value calculated in the adder 13 is stored in the correct memory cell.
  • the second counter 5 is counted down gradually from an initial value with the aid of the signals of the sensor wheel until the value ZERO is reached.
  • the adder 13 is used to calculate the initial values according to the equation given above. The calculation always takes place when the first counter 3 reaches the value ZERO and triggers an ignition process Has. If the coil 1 has triggered an ignition process in FIG. 1, the next initial value A1 is calculated and stored in the register 11 at the point which is responsible for calling the next value A1. The storage at the correct address is ensured by the output signal x of the first pointer 7.
  • the second counter 5 As soon as the second counter 5 has reached the value ZERO based on the clock signals of the sensor wheel 1 starting from an initial value A, the next output value is loaded into the second counter 5.
  • An output signal y from the second counter 5 to a second pointer 15 ensures that the correct output value is loaded into the second counter.
  • the output signal y of the second pointer 15 is output to the output stage control 9 of the control device, so that the correct coil begins with the charging process.
  • the flowchart in this figure shows that an angle interrupt signal 1 is fed to a first counter 3.
  • a first step a the count of the first counter 3 is decreased by one level by the angle interrupt signal of the encoder wheel 1.
  • a query is made as to whether the counter reading has the value Has reached zero. If this is the case, the next initial value Ax is calculated in one step according to the equation explained with reference to FIG. 1. This value is stored in the second counter 5. At the same time, the associated spark plug is ignited. Then, in a step d, the first pointer 7 is shifted by one step from x to x + 1.
  • step e the counter reading of the second counter 5 is decreased by one level. This is carried out immediately if it has been determined in step b that the first counter 3, also referred to as the ignition counter, has assumed the value ZERO.
  • a query is made as to whether the second counter 5 has assumed the value NULL. If this is the case, in a next step g the associated coil is switched on according to the second pointer 15 and its loading process is started.
  • step h the content of the corresponding memory cell is entered in the second counter 5 in the register 11.
  • step i the second pointer 15 is shifted by one step.
  • step f shows that the counter reading of the second counter assumes the value NULL the flow diagram is run through from the beginning.
  • the ignition control device is characterized in particular by the fact that only two counters are required for switching the individual spark coils of the ignition device on and off. This means a significant simplification of the hardware and thus a reduction in the susceptibility to failure of the device. In addition, the costs for such a device were significantly reduced, since a known counter had to be provided for each coil in known devices.
  • the counting means or counters can be implemented not only by hardware but also by suitable software.

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  • 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)
EP89912393A 1988-12-13 1989-11-15 Verfahren zur steuerung der zündung einer brennkraftmaschine Expired - Lifetime EP0448566B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3841862A DE3841862A1 (de) 1988-12-13 1988-12-13 Verfahren zur steuerung einer brennkraftmaschine
DE3841862 1988-12-31
PCT/DE1989/000714 WO1990007057A1 (de) 1988-12-13 1989-11-15 Verfahren zur steuerung der zündung einer brennkraftmaschine

Publications (2)

Publication Number Publication Date
EP0448566A1 EP0448566A1 (de) 1991-10-02
EP0448566B1 true EP0448566B1 (de) 1994-05-25

Family

ID=6369015

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89912393A Expired - Lifetime EP0448566B1 (de) 1988-12-13 1989-11-15 Verfahren zur steuerung der zündung einer brennkraftmaschine

Country Status (7)

Country Link
US (1) US5193516A (ja)
EP (1) EP0448566B1 (ja)
JP (1) JP2792976B2 (ja)
BR (1) BR8907818A (ja)
DE (2) DE3841862A1 (ja)
ES (1) ES2018987A6 (ja)
WO (1) WO1990007057A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5370099A (en) * 1990-08-24 1994-12-06 Robert Bosch Gmbh Ignition system for internal combustion engines
DE4121391A1 (de) * 1991-06-28 1993-01-14 Bosch Gmbh Robert Verfahren zur steuerung einer ruhenden zuendverteilung
DE69510254T2 (de) * 1994-03-25 1999-10-14 Kaisui Kagaku Kenkyujo Kk Antimikrobielles Mittel

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112895A (en) * 1973-05-10 1978-09-12 Ducellier Et Cie Electronic distribution and control device for the ignition of internal combustion engines, particularly for motor vehicles
DE2923425A1 (de) * 1979-06-09 1980-12-11 Bosch Gmbh Robert Zuendanlage fuer brennkraftmaschinen
JPS5620759A (en) * 1979-07-27 1981-02-26 Nippon Denso Co Ltd Ignition device for internal combustion engine
US4265211A (en) * 1979-11-23 1981-05-05 General Motors Corporation Distributorless internal combustion engine ignition system
US4380980A (en) * 1981-10-13 1983-04-26 Motorola Inc. Ignition spark timing circuit
JPS59110861A (ja) * 1982-12-16 1984-06-26 Mitsubishi Electric Corp 内燃機関点火装置
IT1208333B (it) * 1984-06-29 1989-06-12 Marelli Autronica Sistema di accensione elettronica a distribuzione statica per un motore a carburazione
US4750467A (en) * 1986-09-11 1988-06-14 General Motors Corporation Internal combustion engine ignition system
DE3886421T2 (de) * 1988-03-18 1994-04-07 Bosch Gmbh Robert Anlage zur erkennung eines zylinders bei einem verteilerfreien zündungssystem.
IT1224022B (it) * 1988-12-22 1990-09-26 Fiat Auto Spa Procedimento per comandare l'accensione in motori a combustione interna particolarmente motori con accensione diretta a bobine singole e relativo sistema
IT1232580B (it) * 1989-02-13 1992-02-26 Fiat Auto Spa Dispositivo di accensione statica per motori a combustione interna
JPH0781547B2 (ja) * 1989-03-08 1995-08-30 三菱電機株式会社 内燃機関の点火時期制御装置
JP2813210B2 (ja) * 1989-09-29 1998-10-22 三菱電機株式会社 内燃機関用気筒識別装置
US5060623A (en) * 1990-12-20 1991-10-29 Caterpillar Inc. Spark duration control for a capacitor discharge ignition system

Also Published As

Publication number Publication date
JP2792976B2 (ja) 1998-09-03
DE58907720D1 (de) 1994-06-30
ES2018987A6 (es) 1991-05-16
EP0448566A1 (de) 1991-10-02
WO1990007057A1 (de) 1990-06-28
DE3841862A1 (de) 1990-06-21
BR8907818A (pt) 1991-10-01
US5193516A (en) 1993-03-16
JPH04502194A (ja) 1992-04-16

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