DE2131762C3 - Ignition control circuit - Google Patents

Description

electrodes and the triggerable switching device 55 of FIG overall · ^ _u arrangement for the varia-

switched capacitor, facilities to connect. J ^^ 'erSngskreis according to Fig _: 2.

to the control electrode with the Zündunterbrecher- Wen ^{z "ndverz} ° g currently _cbnmg is a schematiches

contacts and facilities to charge the two in * g · _ondensatoren tladungszündkreises overall

th capacitor to a predetermined voltage, scarf ttalddeM ^ ^^ _tnchel

when the Zündunterbrecherkontakte closed 60 "JgtJftesJ ^ J ^ J ¹ _En ergieerzeugungskreis

and are enclosed for rendering conductive the Halble.terschau- ^ ^ Lin.e ^{to ni} ° _{ichelten line}

device when the ignition breaker contacts open '. ^. ^^ f ^ _{n thin with a} dashed line

^fd S ^ "

wSterbüdungen and functional execution, ^ S ^ --S ^

embodiments of the invention will become apparent from the Anspru- 65 g of ¹ ^ ⁶ ^, ^1; ';"^ _gesch lossenen line were enclosed

^Che D ⁿ he fulfillment deals with a solid- state- «^^ g ^^^ io as part de, system =

Kondensatorentladungszündeinheit which arbei- so the bnergieerze g _s

comprises a conventional capacitor 109 provided generally with the reference numeral 18 as designated transformer and a transistor circuit of the trigger circuit, generally designated also with further parts for connecting the main parts, the reference numeral 20. In detail, it has stronger. ² The transformer 18 has a saturable semiconductor switching device 1Ö4, which here as an internal core 22, on which a primary winding 24, 5 transistor is shown, a pair of output electrodes, a secondary winding 26 and a feedback HO and 112 and a control electrode 114 is wrapped. The primary winding 24 has input electrodes 110 and 112 are connected to the condenser by a first terminal 30 which is connected to a terminal 34 via a conductor 106 between a grounded terminal 116 32. The second and the cathode electrode 90 of the controlled SiIi connection 36 of the primary winding 24 is connected in series via a to ziumrectifier 86. A semiconductor diode 38 with the emitter electrode 40 of the terminal 118 for a key switch can be connected to a transistor amplifier 20. The collector source of positive potential are connected, electrode 42 of the transistor amplifier 20 is connected to which the positive terminal of the storage battery is connected to a point of fixed potential (earth). One of the engine can be. The connection 118 is connected via the connection of the feedback winding 28 is also a resistor 120 and a diode 122 if connected to the connection 36, while the connection point 124 between the output or other connection 44 of the feedback winding 28 collector electrode HO of the semiconductor switching device via a resistor 46 to the base electrode 48 device 104 and one terminal of the capacitor 106 of the transistor amplifier 20 is connected. The connected. The connection 118 for the key lock 34 can be connected to the positive. A switch is also connected via a resistor 126 to the direct current storage battery, which normally belongs to the ungrounded connection 128 of the circuit breaker for the motor. The nega- contacts 108 in connection. This ungrounded antive terminal of the battery is connected to earth. Terminal 128 is further connected to a connection point. A first terminal 50 of the secondary winding 26 130 between the first terminal of a resistor of the transformer 18 is through a conductor 52 with »5 stand 132, the anode of a diode 134 and the first terminals 54 and 56 of a pair of method of a diode 136 in connection. The other capacitors 58 and 60 are connected. The condensate connection of the resistor 132 is connected via a capacitor 58 and 60 are the essential part of the capacitor 138 and via a conductor 140 to the energy storage circuit 12. The other connection 62 connection point or connection 76 in connection, the secondary winding 26 is with the help of a parallel A capacitor 142 is connected via the other connection of a resistor 64 and a diode connections of the diodes 136 and 138, ie via their 66 to the other terminal 68 of the capacitor cathode and anode, respectively. A resistor 144 58 connected, the terminal 68 forming a junction connecting point between the junction point. The cathode electrode of the diode resistor 132 and the diode 134 with the base 66 are connected to the connection point or the connection or control electrode 114 of the semiconductor switching device connection 68 via a conductor 70. A connection 104. A resistor 146 is connected between the allele circuit of a resistor 72 and a control electrode 114 and the grounded connection diode 74 is connected between the connection point 116 of the semiconductor switching device 104, the connection 68 and the other connection 76 of the control circuit 17 of the system for on / off, wel capacitor 60 arranged, wherein the connection 76 40 is rather enclosed by a dashed line, also forms a connection point. The discharge circuit 14 for the energy has a second transistor amplifier 150 and a coupling load, which in this case consists of the primary winding resistors 152, 154 and 156. The resistor 78 of the induction or ignition coil of the ignition system 152 couples the collector electrode of the transistor system, a resistor 80 being connected in parallel to amplifier 148 with a connection point 158 of the primary winding 78. The parallel between the anode of the diode 134 and a connection of resistor 80 and primary winding 78 circuit of the resistor 144. The coupling resistor over a conductor 82 with the terminal 56 and stand 154 connects the emitter electrode of the Transi over a conductor 84 connected to earth. In the storage amplifier 150 with a ground connection 160. The discharge circuit is also a controlled silicon DC 50 ground connection 160 is contained via a diode 162 with the converter (SCR), which is generally connected to the connection 118 for the key switch. Reference numeral 86 is denoted and an Anodenelek- Finally, the coupling resistor 156 connects electrode 88, a cathode electrode 90 and the collector electrode of the transistor amplifier 150 control electrode 92 has. The anode electrode with the base electrode of the transistor amplifier 148. 88 is connected via a conductor 94 to the connection point or terminal 76. The cathode is connected with the help of a conductor 164 to the positive anode 90 hangs via a diode 96 with a circuit of the battery.

grounded terminal 98 together. The connection 98 The connection point or connection 36 between

further depends on a diode 100 with the connection of the primary winding 24 and the feedback

connection point or connection 76 together. Next 60 treatment winding 28 of the transformer 18 protrudes

a resistor 102 connects the control electrode 92 a capacitor 37 to a connection point

of the controlled silicon rectifier 86 with the 39 in connection, with which a first connection

grounded terminal 98. of a resistor 41 and the anode electrode of a

In the trigger circuit 16, which is connected by a gestri diode 43. The cathode of diode 443

chelten line is surrounded, are one generally marked 65 is connected to the junction or connection 76

the reference numeral 104 denoted semiconductor links.

device, a capacitor 106, the breaker After the details of the switching elements and

contacts 108 of the ignition system with an optional, their connections have been shown in detail

7 8

are, the mode of operation of the preferred should now be equal to the residual charge on the capacitor 60, Embodiment of the invention are considered. the flowing through the secondary winding 26 flows

The general purpose of this system is to provide current through diode 66 and diode 74 to the ladarin, an intermediate voltage during ignition of the capacitors 60 and 58. The parallel to cycle of the engine ignition system, which 5 of the diode 66 connected resistor 64 serves as during the next ignition cycle across the ignition bleeder resistor for capacitor 58 to a coil is discharged. The intermediate voltage has a charging of the capacitor in the direction of the induced such magnitude that it is generated by the direct transforma- tion voltage during the flow of current in the primary ion to allow sufficient winding of the voltage through the ignition coil. This enables a FUe ignition voltage on the spark plugs there. With this »° ßen of the secondary current in the direction of the Diodenpo arrangement the ignition coil will then have an impulse imme- diately after being caused by the transformer instead of a coil with transformer saturation caused interruption of the tion, as is the case with known systems. Current flow through the primary winding. The effect

First of all, it should be assumed that the positive resistance 64 decreases as a leakage resistance tive connection of the battery used in the system, then the cut-off voltage, which is applied to the primary circuit connected to terminal 34, returned during winding, and above the over-negative The connection of the battery is connected to the ground between the emitter and collector of the transistor. The power generation circuit 10 works to the effect that amplifier 20 is applied to an acceptable level, That battery power is converted into an intermediate voltage thereby causing a voltage breakdown of the transistor is implemented, which a higher value than the * ° is avoided.

Voltage of the battery. This higher inter- The transistor of the transistor amplifier 20 is

The low voltage in the energy storage circuit 12 is preferably a highly conductive low voltage later discharge through the primary winding 78 transistor, z. B. a high current germanium transider Ignition coil saved. The power generation disorder. By using the semiconductor diode 38 in circuit includes the transformer 18 and the semi- »5 row with the emitter-base circuit of the transistor of the ter or transistor amplifier 20. Transistor amplifier 20 contributes to any fault current

When the key switch of port 118 is turned on elevated temperatures as a preload in a current flows through the reverse direction, which is a further fault status 41 and the diode 43 and lets the capacitor flow obstructed. The semiconductor diode 38 is used 60 as indicated by the polarity designations in 3 °, a fixed residual voltage F i g. 1 is indicated. If the capacitor is to be provided on the feedback circuit to get into it Manner as they are described below due to the risk of resonance of the inductance of the is discharged via the discharge circuit 14, the primary winding with the capacity in the circuit and the Via the capacitor 37 a current pulse from the occurrence of natural oscillations to a minimum Bring terminal 34 of the battery through the primary winding 35.

24, the capacitor 37 and the diode 43, and the above cycle of effects repeats itself

controlled silicon rectifier 86 and the diode for each ignition of the controlled silicon rectifier 96 moved to earth. The one generated by this pulse (SCR) 86, whereby the capacitor 60 after each generated Current flow through the primary winding induces the ignition process back to the desired potential Voltage in the feedback winding of the 4 ° tial is loaded.

Transformer 18, and this feedback voltage The resistor 72 is used to transfer the charge on

voltage has such a polarity (see polarity- derive the capacitor 60 if the system designations on the transformer) that the Transi is switched off.

storage amplifier 20 becomes more conductive. This reduces the parallel to the primary winding 78 of the ignition coil

the impedance of the transistor amplifier 20 and connected resistor 80 is a protective resistor, thereby enabling a greater current flow through which a discharge path for the capacitors provides the conductor 32, the primary winding 24, the diode 38, 58 and 60 in the event that the primary winding - and the emitter-collector path of the transistor circuit 78 is opened or switched off. The value is greater than 20. So it can be seen that the feedback of the resistor 80 is chosen so that the controlled winding and the transistor on regenerative 5 ° silicon rectifier 86 work during a maximum manner to ensure rapid saturation of the trans-period and with a minimum of reduction to produce saturable core formators 18. The output energy of the coil can remain conductive through the primary winding 24 and the transistor amplifier 20, so that the power generating circuit does not trigger, continues until the transformer is switched on, while the capacitors 58 and 60 on one gate core are close to saturation, at which point 55 substantial voltage are charged. With a bc of the marginal charge created by the feedback winding 28 on the capacitors, the feedback current will be significantly reduced. Cut-off voltage in the primary winding of the trans. The transistor then switches off and the current ceases to flow through the primary winding 24 at the end of the regeneration cycle. klus brought to a minimum in order to achieve einci

During this period of the regenerative effect ^{6o voltage breakdown of} the transistor of the Transi kung before the transformer saturation flows into the storage amplifier 20 to prevent. Secondary winding 26 a very small current. As soon as the control and discharge circuit 14, which vo

the current through the primary winding 24 is enclosed by a dashed line, the saturation ceases, the charges stored in the primary winding to discharge the energy stored on the capacitors 58 and 6 to the secondary winding ⁶ 5 through the primary winding 26 transformed and only flows through the diode 78 of the ignition coil when the controlled silicon 66 and the conductor 70 for charging the capacitor rectifier 86 is controlled to be conductive. In detail 58. When the charge flows on the capacitor 58, when the controlled silicon rectifier f

9 10

is switched on and so a lower impedance through the resistor 126 and the diode 134 and represents the charge on the capacitor 60 for charging the capacitor 142. A current continues to flow Termination 76 through conductor 94 and from the anode through resistor 144 and through the base electrode 88 to the cathode electrode 90 of the controlled emitter path, i.e. from the control electrode 114 erten silicon rectifier 86, through the diode 96 5 to the output electrode 112 of the semiconductor switch and conductor 84, through primary winding 78 of direction 104, which is parallel to resistor 146 Ignition coil and the conductor 82 is switched to the other terminal. The various values of the switching 56 of the capacitor 60. By using the elements are chosen so that there is an increase in Diode 96, the cathode of which is connected to earth conductivity of the transistor or semiconductor as shown is, a negative pulse to the trigger ίο switching device 104 results, which a fast like the controlled silicon rectifier in the lei- current flow from earth through resistor 102, the can be used in a certain state. Control electrode 92, the connection point on the

The silicon controlled rectifier 86 is turned on on the cathode side of the silicon controlled rectifier

switches when the cathode leakage electrode of the DC 86, through the capacitor 106 and the transistor

Richter a negative pulse from capacitor 106 15 or the semiconductor switching device 104 to earth

in the trigger circuit 16 is supplied. ensures. Once the capacitor 106 has discharged

Specifically, when the cathode electrode is off, the output or collector electrode 90 of the controlled silicon rectifier 86 remains a negative 110 of the transistor or semiconductor switching device, a current from the generator 104 remains essentially at ground potential in order to terminate Terminal 98 through the key switch connected to the control electrode 20 prevent changes in the voltage from the trode 92 of the rectifier from triggering the control 102 again. As mentioned above, this turns on the controlled silicon rectifier 86 with the sub-silicon rectifier open and allows the flow of breaker contacts 108 to cause
When the interrupter contacts 108 are closed again by the rectifier and by AS, the charge on the capacitor primary winding 78 of the ignition coil is retained. . capacitor 142 the line in the base circuit of the

Since the ignition coil is inherently inductive, the transistor or the semiconductor switching device 104 cannot stop the current flowing immediately after the capacitors 58 and 60 have been discharged for a predetermined limited period of time. The current that comes to rest around the breaker contacts continues to flow until a peak counter voltage 30 and thereby eliminating difficulties occurs on the capacitors 58 and 60. In this which would otherwise occur through contact bouncing. Point only the capacitor 60 reverses the direction. Voltage is charged, which is a function of the recovered from 35 and the diode 134 blocks any current return flow to this oscillation cycle and the breaker contacts. When the semiconductor is consuming energy. While the opposing switching device 104 is switched off, the continuous flow of current is again made non-conductive in the rectifier 86 described above, and the pulse from its control electrode 92 is removed 40 via the resistor 120 and the diode 122 loaded. The diode 122 results in a blocking effect, it is switched off and holds the residual charge on which the capacitor 106 enables the capacitor 60. The capacitor 58 however remains highly charged on this circuit during the period of time of the reverse direction to the removal closed interrupter contacts 108 to accept applied transient voltages from the energy generating voltage. This gives an advantage to support supply circle 10. The resistor 132 45 in cold weather, especially when starting the engine, and the capacitor 138 act to reduce when the battery voltage is at its lowest point just before the ignition of the re-application of potential at the controlled point.
Silicon rectifier 86 for the purpose of triggering. The diode 136 serves as a shunt for signals

In order to ensure reliable triggering of the controlled high potential, which is required by the distributor during the rectifier 86 under all operating conditions 5 ° of the periods, a trigger circuit 16 was able to be returned with negative potential. It protects against the impulse provided. As shown, the diode 134 resists voltage breakdown. In the trigger circuit from the resistor 120, the diode in some motor vehicles, a residual voltage 122, the capacitor 106, the resistor 102, can be fed back to the ignition circuit when the motor of the diode 96 and the semiconductor switching device 55 are running. This can be sent to the voltage _{comparison circuit to:} 104, which produces a basic ignition pulse that is generated by the charge indicator lamp, while the resistor 126, the lower part of the instrument panel, works in turn to the breaker contacts 108, the diode 134, the diode 136, show the During the charging process in the power generation system, resistor 144, resistor 146 and that of the motor are used. It has been found that this capacitor 142 to the conductive state of the half ⁶ ° voltage can have a sufficiently high value leitcrschahcinrichtung, control 104th a sufficient charging current in the capacitor

When the key switch of the connector 118 106 for further ignition of the controlled silicon

is switched on, a current also flows through the rectifier; 86 to surrender. To this difficulty

Resistor 120 and diode 122. The control circuit 17 for on / off predcnsator has to be overcome by the con 106 and the diode 96, seen around the capacitor 65. The control circuit 17 contains a clamping

106 to load when the breaker contacts 108 voltage comparison circuit, which scans when the

are closed If the interrupter contacts of- voltage from the key switch below a previous

fcn, a current flows from the terminal 118 at the correct reference value compared with the battery

11 12

voltage drops. When this occurs, current flows con - The in FIG. 2 time delay circles

continuously to the base of the transistor or the semi-ignition point when they are used

conductor switching device 104 and prevents over a certain low speed range of the

Reloading the capacitor 106, whereby the Sy- motor decelerate and are above the given

system is switched off. 5 effectively cut off the speed range.

When the key switch is on, a transistor 166 is in the base circuit of the a current through the junction between the base and transistor or the semiconductor switching device 104 Emitter of the transistor amplifier 150 and brings the- added. In detail is the Emitter-Kollcktorsen as a result in a conductive state. Since the base circuit of the transistor 166 in series between the If there is no resistance of the transistor, OK is resistor 144 and the base or control electrode the voltage across the resistor 154 is essentially the 114 of the transistor or the semiconductor switching device equal to the battery voltage. A resistor 104 is connected. The base electrode of the Transi-151 serves to stabilize the "off" state of the stors 166 is with the help of a conductor 168 with a Transistor amplifier 150, if the key switch connection point 170 connected to which one ter to terminal 118 is open, and the diode 162 15 first terminal of a resistor 172 and one results in a shunt for induced junction resistance 174 connected. The other signal, which when the key switch closes the resistor 172 is connected to earth, can occur to a destruction of the Transi- while the other connection of the resistor 174 to prevent storage amplifier 150. connected to the emitter terminal of a transistor 176 the voltage of the key switch is essential. The base electrode of transistor 176 If the battery voltage drops below the battery voltage, a current is connected through a resistor 178 to the connection of connected to the terminal 34 of the battery through the crossover point 130. The collector electrodes of the The output between the emitter and the base of the transistor 176 is variable amplifier 148, through resistor 156, through resistor 180 to the connection of the key collector-emitter path of the transistor amplifier 25 switch in connection. Finally one connects 150 and through the resistor 154 to the earth capacitor 182 the collector electrode of the transi-circuit 160 flow. This results in a flow of current interfering with 176 with connection point 130. through the emitter-collector path of the transistor. The transistor 166 is when the sub-amplifier is opened 148 through resistor 152 and breaker contacts 108 do not conduct until the voltage through the resistor 144 to the base circle of the Tran 30 across the resistor 172 is sufficiently small to sistors or the semiconductor switching device 104. These- a sufficient flow of current from the lower Current flow is through the diode 134 under the assumed breaker contacts 108 through runs continuously and prevents the resistor 144 from charging through the transition between Capacitor 106, since the normal charging current for the emitter and base of transistor 166 and through the the capacitor 106, which normally through 35 resistor 172 to give ground. The flow of electricity the resistor 120 and the diode 122 flows over through the emitter-base junction of the transistor 166 the collector-emitter path of the transistor or decreases that of the emitter-collector path of the the semiconductor switching device 104 to earth next to transistor 166 shown impedance so that a closed is. When the voltage of the key base current for the transistor or the semiconductor switch Is zero, no power can be provided from the key switch device 104. With a switch to flow to capacitor 106, and the tran- such base current becomes the transistor or the Transistor amplifiers 148 and 150 only need to be conductive between semiconductor switching device 104 and operate a predetermined voltage level of the key in the context of F i g. 1 described switch below battery voltage up to such a point as to ignite the controlled silicon voltage level, which for triggering the control 45 rectifier 86 to cause.

A delay in the conduction of the transistor

was no longer enough to work. 166 is caused by a charge on the con-

It is to be noted that by connecting the capacitor 182 which is through the transistor 176 and

Circuit from terminal 34 of the battery to resistors 174 and 172 flows when the sub-junction point 158 which the capacitor 50 breaker contacts 108 are close to the battery voltage

142 and the resistor 152 is common, this (breaker contacts open). Resistance 17i

Capacitor 142, as a filter for all transitions, causes transistor 176 to conduct if it does

Pulse of a short duration acts, which in the key the breaker contacts 108 are open unc

switching circuit are introduced, and to a conducting non-conductive, if the breaker contacts ge

of transistor amplifier 148 when 55 are closed L.

the motor is running and the breaker contacts are closed

are closed. becomes the connection point of the capacitor

In some applications it may be desirable to 182 and resistor 178 to be at ground potential

Turn out to be a device to control and the capacitor 182 is connected to a Geschwir

the point in time in the cycle at which the speed is loaded by the RC line

Controlled silicon rectifier 86 is ignited, pre-constant of the resistor 180 and the condensate.

watch so the possibility of an early or tors 182 is determined. Provided that the Ladur

To have the engine retarded. Fig. 2 shows that on capacitor 182 is sufficient to d

Manner in which a small number of parts match the voltage across resistor 172 of the spar System according to FIG. 1 can be added to exceed 65 layer voltage of transistor 166;

to give this feature. In Fig. 2 are such, the transistor 166 is kept non-conductive «

Parts that correspond to the in FIG. 1 are identical to until the capacitor 182 nearly cntladi

the same reference numerals as in FIG. is. The capacitor 182 continues to deliver power until

13 14

is loaded in reverse. With this inverted lasis the transistor 186 conducts and a current through the

tion becomes when the idle time is insufficient to the base-emitter junction of transistor 186 and through

Obtaining a charge in the forward direction on the capacitor 1 '2, a diode 198, the ^K ollek-

Capacitor 182 is, no delay in the trigger-emitter path of transistor 176 and the

like the transistor or the semiconductor switching device 5 resistors 172 and 174 can flow to earth. the

device 104 occur. The resistor 174 is a stabilizing effect on the discharge of the capacitor 182 is

lizing and limiting resistor for controlling the as described above. The collector circuit of the transit

Of charge flow from capacitor 182 to ground. ors 186 keeps current flowing through the transistor

The 184 upright provided by the circuit according to FIG. Once the capacitor 182 is discharged This delay is on cranking and when it is low, and thereby the conduction of transistor 166 and At speeds useful to delay ignition ignition of the circuit, the current flows again Achieve too early ignition during the capacitor 182 until it is reversed Starting and a control of the exhaust discharge in reverse direction is loaded. When the capacitor prevented at idle. When the circuit is reversed, the transistors switch be divided so that it turns off at each desired rotation 15 186 and 184 and the capacitor 182 begins numerical value becomes ineffective to the normal ignition time due to the current from the key switch Point control during acceleration and Ar- through resistor 180, capacitor 182 worker? «of the motor become effective under load and the resistors 192 and 190 to earth are released, load. If the loading speed is sufficient

One factor in balancing the circuit 20 is to have a charge in the forward direction on the one shown in Figure 2 is the quiescent time, ie the time it takes to reach capacitor 182, it will lead to a delaying effect during which the breaker contacts occur between occurrences the ignitions expressed in degrees of the interruption contacts in the next ignition cycle divider rotation or as a percentage of the time between opening. When the charging speed is not shut off the ignitions. The embodiment is sufficient to effect a charge in the forward direction on the form according to FIG. 3 shows a similar circuit capacitor 182 zn , the circuit for controlling the ignition timing of the controlled Si has no effect on the ignition timing. Since the silicon rectifier 86, in which, however, the quiescent recharge of the capacitor 182 in the forward time is no longer a factor for the adjustment. In Fig. 3 direction begins as soon as it is unloaded, they are again those parts, which together 30 idle time have no effect on the delay time. context with F i g. 1 and 2, the diode 198 prevents the inverted lamit from being provided with the same reference numerals as used in these two connection of the capacitor 182 immediately via the counter-figureK. stands 192 and 190 and the transition from the base

The circuit of Fig. 3 is the same as that of Fig. 2 is discharged to the collector of transistor 176,
quite similar, with the exception of an added 35. The circuitry which forms the preferred additional pair of transistor amplifiers or embodiment of the invention and in which transistors 184 and 186. The transistors 184 and transistorized control of the trigger circuit for the 186 can provide a device with multiple over - Controlled silicon rectifier is used, or alternatively two devices with two gives more positive shaped pulses for triggering and transitions. The emitter electrode of the Transi- 4 ° has the advantage of "holding off" the highest gate 184 is with the connection point 130 and the most voltage available during starting. The circuit further allows the keeping of the same connection point connected to the base electrode through a resistor 188. The collector conventional capacitor across the lower gate electrode of transistor 184 is connected to the base breaker contacts in the ignition system, whereby the electrode of transistor 186 and via a resistor system are easily connected to ground from a "discharge ignition" to 190. The collector electrode - conventional ignition for the maintenance of the system trode of the transistor 186 can be switched with the base electrode. Next, the transistor 184 is connected through a fixed. A resistor 192 delay in restoring the charge connects the emitter electrode of the transistor 186 to the capacitor 106 the effect of a contact with its base electrode, and the emitter electrode 5 ° bounce not only sifted out, but completely under the transistor 186 is pressed to a first terminal. Double ignition of the controlled suicide capacitor 182 for the time delay converter is therefore avoided.

The collector electrode of transistor 186 is at the point shown in FIG. 2 and 3 a special delay

in addition to the connection to the base electrode of the 55, which can be adapted to the special

Transistor 184 is adjustable via a resistor 194 and the requirements of the motor.

a capacitor 196 connected to ground. While a preferred embodiment of the

As mentioned above, the circuit of FIG. 3 invention has been described and illustrated is

very similar to the circuit of FIG. In addition, it is clear to the person skilled in the art that various modifications

the transistors 184 and 186 are provided in order to be able to ^{carry out 6o functions and changes,}

the beginning of the recharging of the capacitor 182. B. a positive earth system may be desirable

To enable it, as soon as it should initially open as a result of the opening, it is advantageous to connect the capacitor 60 via

nens the breaker contacts has been discharged. a semiconductor controlled switching device (SCR) 86

When the breaker contacts open, an earth flows instead of through the primary winding of the ignition

Discharge current through the junction between the emitter and 65 coil. In this way, damp

Base of transistor 184, through resistor 194 speed or fault current paths to earth on the primary

and capacitor 196 to ground. This causes the ignition coil to not discharge the winding

that the transistor 184 lead via its collector to the Ba capacitor 60 between the Zünduneen.

For a positive earth system it is only necessary that the polarities of all semiconductors and the battery polarity be reversed. The SCR device in the form of a triac or other bipolar Facility that can be used

still using either negative or positive the principles described above trigger will. Accordingly, the invention described here is intended to> only in accordance with the area

invention
of claims be limited.

1 sheet of drawings

Claims (8)

Patent claims: 1. Ignition control circuit for an internal combustion engine with a voltage or energy generation circuit, which with a direct current source with a first potential for generating a Output voltage is connected to a much higher potential, one to the output of the voltage or energy generation circuit related energy storage circuit to at least temporarily storing an electrical charge, devices with a triggerable one Switching device for switching the energy storage circuit in series with the primary winding an induction coil and one responsive to the opening and closing of the ignition breaker contacts Trigger circuit for supplying trigger signals to the triggerable switching device such that the charge in the energy storage circuit for a predetermined period of time flows through the primary winding when the triggerable switching device receives a trigger signal receives, characterized in that the voltage or energy generation circuit (10) a saturable transformer (18) with a primary and a secondary winding (24, 26) and means for directly connecting the primary winding to the direct current source with which contains a potential (34), and that the trigger circuit (16) comprises a semiconductor switching device (104) with a pair of output electrodes (110, 112) and a control electrode (114), a first connected in series with the pair of output electrodes and a control electrode, th capacitor (106), a second in series with the pair of output electrodes and the triggerable switching device switched capacitor, devices for connecting the Control electrode with the ignition breaker contacts (108), and devices for charging the second capacitor to a predetermined voltage when the ignition breaker contacts (108) are closed and for making the semiconductor switching device conductive when the ignition breaker contacts are open. 2. The ignition control circuit of claim 1, wherein the saturable transformer comprises a primary winding, a secondary winding and a feedback winding, a semiconductor current control device with a first and a second electrode and a control electrode, Means for connecting the first and second electrodes in series with the primary winding and via a direct current source characterized by means for connecting the feedback winding (28) with the control electrode (48) such that when flowing of a current pulse through the primary winding (24) creates a voltage in the feedback winding (28) is generated to prevent an additional current from flowing through the primary winding (24) and to enable the semiconductor power control device in a regenerative manner and a To generate voltage of high potential across the secondary winding. 3. ignition control circuit according to claim 2, characterized in that the energy storage circuit (12) is connected to the secondary winding (26) and at least one capacitor (58, 60) with first and second connections, means for connecting one of the connections (54, 56) with one connection (50) of the secondary winding (26) and one which conducts current in one direction Means (66, 74) which the second connection with the other connection (62) of the Secondary winding connects. 4. ignition control circuit according to claim 1, 2 or 3, characterized in that the triggerable Switching device from a controlled silicon rectifier (86) with a first and second Electrode and a control electrode (92), the first and second electrodes in series connected to the primary winding of the induction coil (78) and the energy storage circuit (12) and means for connecting the control electrode to the trigger circuit (16) are provided are. 5. ignition control circuit according to claim 1, 2 or 3, characterized in that the triggerable Switching means comprises a triac which has a pair of output electrodes connected in series connected to the primary winding (78) of the induction coil and the energy storage circuit (12) and a control electrode connected to the trigger circuit. 6. ignition control circuit according to claim 1, 2 or 3, characterized in that the control electrode (114) with the ignition breaker contacts (108) connecting devices a time delay network (Fig. 2 or 3) to hold the semiconductor switching device (104) in the non-conductive state for a predetermined period following the opening of the ignition breaker contacts. 7. ignition control circuit according to claim 1, characterized by one with the direct current source connectable terminal (118) of an ignition key switch, the ignition control circuit having a Comparator circuit (148, 150), which with the direct current source and the connection (118) of the ignition key switch is connectable to sense when the voltage at the terminal of the ignition key switch falls below a predetermined threshold value, and means (158) to connect the output of the comparator circuit with the trigger circuit (16) to suppress its operation while the voltage is on on the ignition key switch is less than the threshold value. 8. Apparatus according to claim 7, characterized _ge: indicates that the comparator circuit enthäl · a first and a second Halbleiterverstär ker (148, 150) trodes with a pair Ausgangselek and a control electrode, Einrichtungei for switching the pair of Ausgangselektrodei of the first semiconductor amplifier ( 148) in series between one connection of the direct current source and the trigger circuit (16), devices for switching the output electrodes of the second semiconductor amplifier (150) between the control electrode of the first semiconductor amplifier (148 and the second connection of the direct current source and devices for connecting the control electrode of the second semiconductor amplifier (ISO) tet that i d Ahlß (118) d Ignition key switch electrode of the second semiconductor amplifier (IS) ^ [^^^ ζ ^ Τ ^ ΓΪΖ with the connection (118) of the ignition key switch ^ ⁸ ATShS? of the following ignition i ^ h () ^ ATShS? of the consequence Steueri klis is discharged. The tension 5 has a considerably higher potential than the potential the battery of the motor, however, it is also essential as the one above the secondary winding of the e! developed tension This character The invention relates to an ignition control ^^ J ^^^ SziSpainunB through dikreis for an internal combustion engine with a clamping ίο zen <* ^s ™ _ma f _ion ^{B of} _the voltage levels through the d Energieeraeugungskreis which mu gjy ^ ^S ™phia 'dß di Ignition coil in circle for an internal combustion engine with a p _ma f _{ion of the} voltage levels through the nungs- or Energieeraeugungskreis, which mu gjy ^ ^S ™ _leads , ' _so that the ignition coil in a direct current source with a first Potenüal J ^ g ^ "^ pulse transformer instead of as a coil to generate an output voltage with essential £ ™ ^h £ ⁿ ^ P _works . borrowed higher potential, one with the ^ ranrfomiaton ^ ^ ^^., Output of the voltage or energy generation- 15 The ^e ™ ^ ^b _{dHchen Ba} u _{erie charge} states a circuit connected energy storage f »^ ™ ^ _constant energy transfer open circuit for at least temporary storage of an elec- ™. ™ ^" _{can be} . Furthermore, the vertical charge, facilities with a tnggerbarreemerna _trans j _storis j _ertc “trigger circle for Ren switching device for switching the energy- ™ "™ ^& _E ™ _{] adun} o _the stored energy through storage circuit in series with the Pnmarw": klung "the semiconductor switch to the E ^ J * ^ ends one an induction coil and one on the opening and the_ £ ^ands P ^ul J, _{b for} triggering, wah- Closing the Zündunterbrecherkontakte appealing ^ J ^ fSSerum high during the Anlaschenden trigger circuit for supplying of trigger ^ end dtese "as makes _available gnalen to the triggerable switching device in such a way * ™™ ^% _by providing a variable Zeitverdaß the charge in the Energiespe. cherkre.s fur eme a ₅ Further w rd du ^ c _{trigger circuit a} particularly predetermined period of time by the pnmarwicking. "f ^ X ^ erungs" function achieved, which flows when the triggerable switching device a ^^ ₅ 7 _η ^ΓΖ ₃ ° _η ^ ^η ξ _{ε5οηίΐ6Γεη} requirements of the mo- ^Ter S ^ara Ignition control is for example already tors "sinstell ^ ^r ^ _{u ate zuen} dsteuerkreis has hif 3 383 555 bkntge 30 f ^^^^^ kli EindSarüger Zünds ^^ _{u external} ignition control circuit known from U.S. Patent 3,383,555 30 f ^^^^^ ng _e ir »e diode in the small D _e r _e rfindun _g is the object of a ££ $ ££ ^ iiSrJÄhfS central regenerating a ^S P described above ^Annun & ^S ™ £. ™ f _auftret s and to correspondingly Zündsteuerkreises directly from the DC power source rend J "^ ^ηΙ" * ^ _retr the starter or _laundri during battery to achieve a complete re 35 ^^ "^^^" m J _n optimal triggering generation during each ignition cycle to reach out to ertassen process, whereby this property is not carried out by oscillating ⁵¹⁰ J ^ ⁵ * ¹ _invention , an adaptation to the voltages which lead to the formation of pulses after the ^ ™ | _rbrech ^B _{erkontakte dadu} rch that cause, 'which _is at high speeds usually bouncing _& J ° £ ^u ™ _Trig gertransistors a Verzögenicht to a full recovery of unloading 40 m ^ bazaars "d" gg _{vo hen} The should lead to tension, be restricted. . xSSeis ^ st ßesperr until this bouncing is over This task is carried out with an ignition control circuit. of the type described at the outset according to the invention. _{the system} according to the invention achieved by that the voltage or energy generation W "te ^r ermog ^lI ™. _{the ignition coil} for each supply circuit a saturable transformer with a 45 ^ '^^^^^ _lalie ^ i _aasa . Primary and one secondary winding and one-nigh- ^de ^ f _h ^ ^e _n ⁿ _gs Spf _el ^Z _e ^U ™ he invention are in the lines for the direct connection of the primary winding "^^^ S _and are in the following namit the direct current source with the one Potential ^ «^ ra ^^ Besteut _{hnu zd} contains, and that the trigger circuit comprises a half-height _besch ^ne ° ^en _cn ^ _atical circuit diagram of a preconductor switching device with a pair of output elec- 50 Fig. 1 em ~ ε ^ capacitor discharge