CN2340929Y - Electronic ignitor with electromagnetic voltage stabilizing and full wave and voltage doubling circuits - Google Patents

Abstract

The utility model relates to an electronic ignitor with electromagnetic voltage stabilizing and full wave and voltage doubling circuits, belonging to the field of the electronic ignition of a gasoline engine. The utility model is mainly composed of a discharge switch for a controlled silicon SCR2, a high-voltage ignition coil B2, a charging winding L1, a trigger winding L2, a capacitor C3 and a diode D3; the charging winding L1 and the trigger winding L2 are arranged in the magneto B1. The utility model is characterized in that one end of the L1 is connected with the ends of SCR1, C1, R1, C4 and C3; the other end of the L1 is connected with the anode of the D2, the cathode of the D3 and one end of the L3. The utility model solves the problem of insufficient ignition energy for high-speed; the power can be increased; the pollution can be decreased; the utility model can generate multiple spark in a discharge process.

Description

Magnetic motor type band voltage stabilizing full wave and voltage doubling ignition

The utility model relates to a kind of magnetic motor type band voltage stabilizing full wave and voltage doubling ignition, and it belongs to petrol engine electronic ignition field.

At present by the widely used electronic ignition device of petrol engine, its major part all is that magnetic motor type half-wave energy storage ignition is CDI, the half-wave energy storage ignition of this routine uses an energy-storage capacitor in the energy storage of charging of non-igniting half-wave, its basic functional principle is: the alternating voltage that a charge coil and output certain amplitude are set in magnetogenerator, one commutation diode and a storage capacitor are set in circuit, utilize commutation diode to carry out one way rectifier, when non-igniting half-wave to the storage capacitor energy storage of charging; When entering the igniting half-wave, by trigger winding (can with charge coil on an iron core, also can be independent that be provided with or utilize charge coil to serve as) trigger signal is provided, trigger the controllable silicon conducting, make storage capacitor to the elementary discharge of spark coil, go out high pressure at the high-voltage ignition coil secondary induction, form discharge spark by spark plug.In order to prevent charge coil zero load when lighting a fire half-wave, make output voltage too high, breakdown potential sub-element and charge coil itself is simultaneously also in order to prevent that charge coil from causing magnetization unshakable in one's determination because of long-term one-way only operation, so used a diode will fill coil short when the igniting half-wave.Though the magnetic motor type single capacitor half-wave energy storage ignition of this kind routine is simple in structure, exists following several problems

1. can not charge in the energy storage of igniting half-wave, and the short circuit of igniting half-wave can only be fallen, so capacity usage ratio is very low.

2. ignition voltage is very inhomogeneous, change along with the rotation speed change of motor, high low speed can not be taken into account, general voltage maximum when a certain slow-speed of revolution, along with the raising of rotating speed because of the frequency characteristic of energy storage charging circuit and the influence of charge coil internal resistance, ignition voltage descends violent, so that weak fiery circuit fire phenomenon appears when high speed sometimes, and this kind phenomenon is just in time opposite with the firing characteristic that motor requires, thereby cause in the motor, power descends during high speed, incomplete combustion, pollution grows worse, oil consumption strengthens.

For this magnetic motor type half-wave capacitance energy storage ignition with routine of above-mentioned shortcoming, many people once improved it, typically improved hysteresis effect as the way of the described employing change of Chinese patent CN2031448U igniting half-wave short circuit diode access charge coil position; CN22130692Y is described as Chinese patent, and adopting in the high-voltage ignition coil primary side increases the charging charging effect of diode with the compensated high-speed section; Be exactly in actual applications in addition, or adopt increase charge coil volume, or adopt and reduce the storage capacitor capacity to reduce high speed charging time constant or the like method with the raising rechargeable energy; But these are improved one's methods and the structure of basic charge-discharge circuit are changed because of failing, thus there is no change, so there is no outstanding especially effect.

The purpose of this utility model is: provide a kind of, can carry out all-wave charging energy storage, can under the various rotating speeds of motor, all keep stable ignition voltage and ignition energy, in a discharge process, can repeatedly light a fire magnetic motor type band voltage stabilizing full wave and voltage doubling ignition.

The purpose of this utility model is achieved through the following technical solutions (seeing accompanying drawing):

It mainly is made up of the charging winding L 1 among controllable silicon discharge switch SCR2, high-voltage ignition coil B2, the magnetogenerator B1 and triggering winding L 2, capacitor C3 and diode D3, it is characterized in that:

The end of L1 is connected with the end of SCR1, C1, R1, C4 and C3, and the other end of L1 is connected with the negative pole of the positive pole of D2, D3 and the end of L3,

The other end of L3 is connected with the end of the other end of SCR1 and C2, and the other end of C2 is connected with the end of the other end of C1 and D1, and the other end of D1 is connected with the control utmost point of SCR1, and the D2 negative pole is connected with the negative pole of D6 with the other end SCR2 of C4 is anodal,

The positive pole of D3 is connected with ground with the negative pole of the positive pole of D4, SCR2, the positive pole of D6, the other end of L2, the other end of L4,

The negative pole of D4 is connected with the end of L2, the collector electrode of T1, and the emitter of T1 is connected with the control utmost point of SCR2, and the base stage of T1 is connected with the negative pole of D5, and the positive plate of D5 is connected with the positive pole of D7, and the negative pole of D7 is connected with the other end of R1,

The other end of C3 is connected with the end of L4, the end of L5, and the other end of L5 is an output terminal.

Below described technological scheme is described further:

Holding tank circuit the igniting half-wave tortoise described in the technological scheme, is to be composed in series mutually by commutation diode D2, energy-storage capacitor C4 and charging winding L 1; Wherein, the b of L1 end is connected in series C4 again and holds through a of port one serial connection L1, and the negative pole of D2 is connected with C4 through port 2 serial connection D2, and positive pole is connected with the charge power supply port one.Recharge here in the circuit, when the magnetogenerator rotation, enter the igniting half-wave, charging winding L 1 will produce b and rectify the negative charging voltage of a end, to get back to a end of L1 from the b end → port 2 → diode D2 → capacitor C4 → port one of charging winding L 1 by the charging current that this voltage produces, thereby finish (4 charging energy storage, this moment, C4 filled to such an extent that the polarity of voltage is that an end that is connected with (SCR2) anode with the D2 negative pole is a positive polarity.

Trigger signal switching circuit in the control of discharge described in the technological scheme, trigger between the control utmost points by partly being connected on trigger signal input port and controllable silicon SCR 2, serve as the trigger signal switch transistor T1 and with discharge signal be delivered to the T1 base stage, constitute by diode D5, reference diode D7, the resistance R 1 step-down sample circuit of forming that is in series; Wherein the collector electrode of T1 is connected on the trigger signal input port 4, emitter is connected on controllable silicon SCR 2 trigger electrodes: serve as D5, the D7 of discharge signal sampling step-down, the series circuit that R1 forms then is connected across between C3, C4 tie point and the T1 base stage, D7 wherein, the D5 Placement in circuit, guarantee, after the C3 charging and surpassing D7 voltage stabilizing value, the electric current in this series circuit is the base stage that flows to T1 from C3, C4 tie point.In this circuit, when magnetogenerator enters non-light-off period, capacitor C3 charging, thus the voltage on the capacitor C3 by reference diode D7 step-down after, provide conducting electric current to make T1 conducting with positive pole, the negative pole of diode D6 to the T1 base stage with resistance R1, single-way switch through current limliting again; Because of the voltage on the capacitor C3 just loses when igniting is discharged, so in the later rotation of magnetogenerator, the conducting of T1 will be maintained to the igniting discharging time; When time of ignition arrives, trigger signal triggers controllable silicon SCR 2 discharge of lighting a fire by port 3 through collector electrode, the emitter of T1, when the voltage on the capacitor C3 is lower than the voltage stabilizing value of voltage-stabiliser tube D7 owing to the igniting discharge, T1 will end because of no base current, thereby trigger signal is cut off; After this, at capacitor C3, when C4 continues discharge and zero passage, the elementary winding L 4 of high-voltage ignition coil B2 will produce a recoil electromotive force and pass through diode D6 to capacitor C3, C4 recharges, when fill on the capacitor C3 voltage when being higher than the voltage stabilizing value of reference diode D7, triode T1 is open-minded once more, trigger signal triggers controllable silicon SCR 2 conductings once more by triode T1 again and discharges, so repeat repeatedly, the voltage that obtains because of the recoil electromotive force on capacitor C3 is not when occurring being higher than the voltage stabilizing value of reference diode D7, repeatedly the igniting discharge finishes, triode T1 also ends because of base current no longer occurring, trigger signal is blocked, and controllable silicon SCR 2 also enters and ends because of no longer obtaining trigger signal; The charging current that the winding L 1 of charging this moment is sent will enter circuit, make capacitor C4 obtain charging, and circuit enters the energy storage charging stage after the igniting of igniting half-wave discharge.

At the discharged recovery short circuit type mu balanced circuit described in the technological scheme, the basic mode of its work is, when overvoltage occurring, make bidirectional triode thyristor SCR1 enter the short circuit saturation state, thereby voltage stabilizing is carried out in charge coil L1 short circuit.This circuit has adopted the mode that is composed in series bleeder circuit by capacitor for the heating problem of the bleeder circuit that solves resistance and form.

The above-mentioned discharge recovered the short circuit type mu balanced circuit, be to pass to SCR1's by the bidirectional triode thyristor SCR1 that serves as voltage stabilizing with the overvoltage signal, with electric capacity C1, C2, the olischarge recovery circuit that is made of inductance coil L3 that transmits the pressure sampling circuit that signal forms with bidirectional trigger diode D1 and can make that the SCR1 recovery ends is formed by dividing potential drop; Wherein, SCR1 is connected across between power input mouth 1 and the inductance L 3, is connected across between the SCR1 cathode and anode after C1, the C2 series connection; D1 then is connected between capacitor C 1, C2 tie point and controllable silicon SCR 1 trigger electrode; The inductance coil L3 that bears the discharge restitution is serially connected between SCR1 and the power port 2; In foregoing circuit, when supply voltage is higher than the protection magnitude of voltage of being determined by the turn-on voltage of C1, C2 intrinsic standoff ratio and D1, voltage on bleeder circuit C1, the C2 tie point, to be higher than the conducting voltage of bidirectional trigger diode D1 and make the D1 conducting, so bidirectional triode thyristor SCR1 is just saturated because of obtaining the trigger signal conducting, make charging winding L 1 by short circuit, because the short circuit of L1,1,2 two-port voltages are near zero, again under the unilateral conduction effect of diode D2, D3, the voltage that makes voltage on C3 or the C4 maintain before the SCR1 conducting no longer changes; This voltage stabilizing process all is like this at igniting, non-igniting half-wave.Because at the igniting half-wave, in some cases, the igniting discharge of the voltage stabilizing conducting of bidirectional triode thyristor SCR1 prior to igniting controllable silicon SCR 2 may take place, thereby cause because of the problem that can't be charged to storage capacitor again by short circuit of charging winding L 1, so in circuit, be provided with the saturated circuit of moving back of a discharge control that constitutes by inductance L 3, its working procedure is as follows, if to have entered conducting saturated because of voltage stabilizing before time of ignition for bidirectional triode thyristor SCR1, when time of ignition arrives, controllable silicon SCR 2 conductings, the voltage of capacitor C 4 is except flowing to spark coil, some will be by controllable silicon SCR 2, diode D3 is added on inductance L 3 and the SCR1, at this moment, inductance L 3 will produce a Kickback voltage because of the electric current that adds suddenly, this Kickback voltage makes the electric current on the bidirectional triode thyristor SCR1 sharply reduce to zero, ends thereby it is changed into from conducting.Like this, after discharge finishes, because bidirectional triode thyristor SCR1 is by making charging winding L 1 remove short circuit, so the charging voltage of charging winding L 1 can be finished recharging capacitor C 4.

At the multiplication of voltage discharge loop described in the technological scheme, be by capacitor C3, C4, controllable silicon SCR 2, the elementary winding L 4 of high-voltage ignition coil B2 are in series and form; Wherein, C3 is with after C4 is connected in series, and the end of C4 is connected in series SCR2 anode, SCR2 negative electrode again through port 6 serial connection L4, and the other end of L4 connects C3 multiplication of voltage discharge loop again through port 5; In this multiplication of voltage discharge loop, when time of ignition arrived, controllable silicon SCR 2 was with triggering and conducting, and the superimposed voltage on C3, the C4 is carried out discharge igniting through controllable silicon SCR 2 to the elementary winding L 4 of high-voltage ignition coil B2, thereby finishes the discharge igniting process.

In the ignition mechanism requirement described in the technological scheme, power input mouth of energy storage coil 2 and trigger signal input port 4 cophasings, and be positive polarity (this magnetic motor type half-wave energy storage ignition with routine is identical) at the igniting half-wave.

In technological scheme between trigger signal input port 4 and the trigger winding L2 output port 3, can insert various forms of " advancing angle control circuit automatically " (line 11 is removed), also can directly provide trigger signal (line 11 is inserted) by trigger winding L2; And trigger winding can be independently to be arranged in the magnetogenerator, also can be directly on the charge coil iron core.

The utility model compared with prior art has following major advantage:

1. utilized the half-wave of light-off period, made discharge voltage and discharging energy all reach a times of custom circuit.

2. the mu balanced circuit that has makes that tank voltage is consistent under various speed, thereby has solved the problem of the ignition energy deficiency of high speed, and power is increased, and pollutes and reduces.

Because of storage capacitor for being connected in series, so just can be under the prerequisite that guarantees certain ignition voltage, the number of turns that suitably reduces the charging winding increases its line footpath and is used for improving middle and high fast ignition energy to reduce internal resistance, simultaneously, reduction because of the internal resistance of charging winding, just can suitably adopt the storage capacitor of larger capacity, with further raising startup and low speed energy storage ignition energy.

4. can in a discharge process, can produce repeatedly spark.

Accompanying drawing is an a kind of embodiment's of the present utility model electrical schematic diagram.

In the accompanying drawings, B1 is magnetogenerator (a dotted line institute frame among the figure), and L1 is the charging winding that is arranged in the B1, and a, b are two output terminals of L1 winding, and the b output terminal is a positive polarity at the igniting half-wave; 1,2 is the charge power supply connecting port; L2 is the trigger signal winding that is arranged in the B1, and e is for triggering the winding output terminal, and it is a positive polarity at the igniting half-wave; 3 for triggering the connecting port of winding.4 are trigger signal input connecting port; 11 is the line between port 4 and the port 3, and its effect is, with this line port 3 is not connected with port 4 when having " advancing angle control circuit automatically " at circuit and inserting, and sends into port 3 so that will trigger the trigger signal that winding L 2 sends; When having " advancing angle control circuit automatically " to insert, remove this line.B2 is high-voltage ignition coil (a dotted line institute frame among the figure), and L4 is the elementary winding of B2, and L5 is the secondary windings of B2, and c, d are two input ends of L4.8 is spark plug; 7 is the connecting port of spark plug and high-voltage ignition coil secondary windings L5.

With reference to the accompanying drawings, be described as follows in conjunction with the embodiments:

When magnetogenerator rotates, output AC voltage under the rotating magnetic field effect.After once the igniting discharge finishes before the igniting half-wave, circuit enters the light-off period charging energy storage stage, the output b of charge coil L1 is proper at this moment, a end is negative, charging current is given storage capacitor C4 charging through diode D2 again through port 2, be pressed onto when reaching certain value when C4 powers on, the charging energy storage of capacitor C4 finishes; At this moment capacitor C4 fill polarity of voltage be: an end that is connected with storage capacitor C3 is for negative, and an end that is connected with controllable silicon SCR 2 anodes is for just.Along with magnetogenerator rotates, enter the non-igniting half-wave charging energy storage stage, this moment, the output of L1 changed that a rectifies, the b end is negative into, charging current is after port one is given capacitor C 3 chargings, through port 5, flow back to charging winding L 1 through port 6, commutation diode D3, port 2 again through the c of L4 end, d end again, till when this charging process is performed until voltage on the C3 and reaches the mu balanced circuit setting value, at this moment capacitor C3 fill polarity of voltage be: an end that is connected with capacitor C4 is for just, and an end that is connected with the elementary connecting port 1 of spark coil is for negative; In the stage of capacitor C3 charging energy storage, when the voltage on capacitor C3 charging energy storage and the capacitor C3 surpasses the voltage stabilizing value of voltage-stabiliser tube D7, this voltage is just by voltage-stabiliser tube D7, resistance R 1, diode D5 provides electric current for the base stage of transistor T 1, makes transistor T 1 conducting, makes the trigger signal switching circuit enter trigger signal and receives standby condition, because the voltage on the C3 only just disappears constantly at discharge igniting, so this trigger signal reception standby condition will be maintained to discharge igniting constantly.Along with the continuation of magnetogenerator rotation, enter the igniting half-wave once more, at this moment, if fill in the charging process of capacitor C4 after igniting discharge last time voltage be lower than the pressure limiting setting value, then before time of ignition, circuit will charge to capacitor C4 once more; If in the last time charging process, capacitor C4 goes up voltage and has reached the pressure limiting setting value, and charging process then no longer takes place.When the magnetogenerator rotation arrives time of ignition, the igniting trigger impulse that is produced by the igniting trigger circuit enters from triggering input port 3, be added to the trigger electrode of controllable silicon SCR 2 by transistor T 1, make controllable silicon SCR 2 conductings, after the SCR2 conducting, the superimposed voltage of capacitor C3, C4 is added on the elementary winding L 4 of high-voltage ignition coil B2, thereby induces the igniting high pressure on the secondary L5 of B2 through port 6, port 5, make spark plug 8 discharges, finish discharge igniting process for the first time.In above-mentioned discharge igniting process, when capacitor C3 discharge voltage was lower than the voltage stabilizing value of voltage-stabiliser tube D7, T1 ended, and trigger signal is turned off.In first time discharge igniting process, when discharge current arrives zero, SCR2 ends, end in a flash at SCR2, will produce a d on the elementary winding L 4 of B2 and rectify the negative reverse self-induced e.m.f of c end, the recharge current that this reverse self-induced e.m.f produces, by port 6, give storage capacitor C3 through positive pole, the negative pole of diode D6 again, C4 charges, and then gets back to the c end of L4 through port 3.In the process that recharges here, when recharge current arrive zero and capacitor C3 on voltage (also can be other value during greater than 80V, voltage stabilizing value by voltage-stabiliser tube D7 is determined, hang down some and can increase the number of times of igniting again, but ignition energy will reduce, simultaneously can not be lower than the minimum voltage that produces spark of spark plug, taking all factors into consideration its value is preferably between the 80V-100V to well), T1 will go up the base current conducting once more that voltage provides because of obtaining capacitor C3, make trigger signal arrive the control utmost point of controllable silicon SCR 2 once more through triode T1 from port 3, make controllable silicon SCR 2 conducting again, thereby finish discharge igniting process for the second time; After for the second time the discharge igniting process is finished, if fill on the capacitor C3 voltage can also surpass 80V, then produce discharge igniting process for the third time, on capacitor C3, fill so repeatedly voltage be lower than till the 80V; When the voltage on the capacitor C3 was lower than 80V, T1 will end because of no longer obtaining base current, and trigger signal also so no longer is transmitted, and this moment, the discharge igniting process finished.After the discharge igniting process finished, circuit entered the energy storage charging stage after the igniting of igniting half-wave discharge.

Narration can be discharged and be recovered the working principle of short circuit type mu balanced circuit below: when the voltage on voltage-dividing capacitor C1, the C2 tie point reaches the conducting voltage of bidirectional trigger diode D1, bidirectional trigger diode D1 conducting, bidirectional triode thyristor SCR1 is conducting thereupon also, at this moment the voltage on the charge power supply L1 just passes through inductance coil L3 by the SCR1 short circuit, make storage capacitor C3, fill on the C4 voltage be stabilized on the magnitude of voltage of qualification and no longer raise.In the above-mentioned mu balanced circuit, if occur in the igniting half-wave, short circuit voltage stabilizing process prior to the igniting discharge process situation the time, then when the time of ignition arrival makes controllable silicon SCR 2 conductings, the part of capacitor C4 voltage will be added on the inductor L3 by controllable silicon SCR 2, diode D3, make L3 produce a Kickback voltage, this Kickback voltage just forces bidirectional triode thyristor SCR1 to withdraw from from conducting is saturated, allow charging winding L 1 from short circuit, discharge, recover charging voltage, recharging after the feasible igniting discharge proceeded.

In circuit, the effect of diode D4 is when triggering winding 2 directly inserts, the negative half-wave short circuit of useless trigger signal to be fallen.The effect of D5 is, for the base signal of transistor T 1 provides one-way passage, prevents the influence of the backward voltage that L4 produces because of discharge igniting.

In circuit, the voltage stabilizing setting value of short circuit type mu balanced circuit is to be determined jointly by the turn-on voltage of the intrinsic standoff ratio of C1, C2 and D1, and concrete computational methods are as follows:

Voltage stabilizing setting voltage value (V)=(C1 capacitance value (μ F) * bilateral diode turn-on voltage (V)) ÷ C2 capacitance value (μ F).

For the foregoing description, because of the conduction value of D7 between 28V～34V, so its voltage stabilizing value is between 187V～227V, it is added in discharge voltage on the elementary L4 of high-voltage ignition coil and is about above-mentioned voltage and takes advantage of 2.

In the accompanying drawings, diode D2, D4, D5, D6 can select the general-purpose diode of 1A/400V for use; The conducting voltage scope of bidirectional trigger diode D1 is: 28～34V; Reference diode D7 is the 1W reference diode of 80～100V with common voltage stabilizing value; Diode D3 can select the general-purpose diode of 3A/600V for use.Capacitor C1 can select the non-electrolytic capacitor of 0.1 μ F/50V for use; Capacitor C2 can select the non-electrolytic capacitor of 0.15 μ F/250V for use; Capacitor C3, C4 are the non-electrolytic capacitor of 1.5～2.2 μ F/250V.Bidirectional triode thyristor SCR1 is 2～3A/250V; Unidirectional controllable silicon S CR2 is 1～3A/600V.Resistance R 1 is 750K～1000K/0.5w; The inductance value of inductor L3 should be greater than 30mH, and allowing should be greater than 500mA by electric current; Transistor T1, the NPN type, HFE is greater than 200 for its magnification factor, and withstand voltage greater than 35V, electric current is greater than 100mA.

Claims (1)

1, a kind of magnetic motor type band voltage stabilizing full wave and voltage doubling ignition, it mainly is made up of the charging winding L 1 among controllable silicon discharge switch SCR2, high-voltage ignition coil B2, the magnetogenerator B1 and triggering winding L 2, capacitor C3 and diode D3, it is characterized in that:

The end of L1 is connected with the end of SCR1, C1, R1, C4 and C3, and the other end of L1 is connected with the negative pole of the positive pole of D2, D3 and the end of L3,

The other end of L3 is connected with the end of the other end of SCR1 and C2, and the other end of C2 is connected with the end of the other end of C1 and D1, and the other end of D1 is connected with the control utmost point of SCR1, and the D2 negative pole is connected with the negative pole of D6 with the other end SCR2 of C4 is anodal,

The positive pole of D3 is connected with ground with the negative pole of the positive pole of D4, SCR2, the positive pole of D6, the other end of L2, the other end of L4,

The negative pole of D4 is connected with the end of L2, the collector electrode of T1, and the emitter of T1 is connected with the control utmost point of SCR2, and the base stage of T1 is connected with the negative pole of D5, and the positive pole of D5 is connected with the positive pole of D7, and the negative pole of D7 is connected with the other end of R1,

The other end of C3 is connected with the end of L4, the end of L5, and the other end of L5 is an output terminal.

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