CN1105101A

CN1105101A - Control circuit for high frequency generating circuit and high frequency electron ignitor

Info

Publication number: CN1105101A
Application number: CN 94107722
Authority: CN
Inventors: 常志坚
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-06
Filing date: 1994-07-06
Publication date: 1995-07-12
Anticipated expiration: 2014-07-06
Also published as: CN1037869C; WO1996001367A1; AU2731395A

Abstract

The control circuit includes high frequency generator and energy-accumulating ignition controller composed of instantaneous overvoltage protecter, automatic cutting-off protecter, fixed duty ratio generator and automatic conduction angle controller. The instantaneous overvoltage protecter is connected to capacitor and ground respectively. The automatic cutting-off protecter is connected serially to fixed duty ratio generator, to automatic conduction angle controller, to high frequency generator (and input of high-power ignition transistor) and to output of high-power ignition transistor. It can change one-pass break-down into multiple-time continuous break-downs, so increasing energy transfer efficiency and speeding up combustion reaction.

Description

Control circuit for high frequency generating circuit and high frequency electron ignitor

The present invention relates to the control circuit of a kind of high frequency generation circuit and high-frequency electronic igniter, it belongs to the control circuit of spark ignition equipment.

Existing automobile energy storage ignition mechanism ubiquity ignition energy conversion (referring to convert electric energy to the oxygen energy) low problem.In igniting process, what energy conversion rate was the highest is the perforation ignition phenomenon, and the energy storage igniting is in whole igniting process, because of air isolation between the spark plug gap, current direction after disruptive discharge produces is constant and can not recover rapidly, the punch-through that makes can only produce once, and spark coil energy storage capacity can only under the low insulation condition after the puncture, do the continuous arc light discharge, energy conversion efficiency is reduced.

The control circuit that the purpose of this invention is to provide a kind of high frequency generation circuit and high-frequency electronic igniter, it can make full use of the energy storage energy, all converts the arc discharge energy to the disruptive discharge form, improves discharging energy, increase energy conversion efficiency, thereby improve firing effect.

The present invention adopts following measure to realize: high frequency generation circuit is by integrated package UA2(CA555), triode Q17, Q16, diode D7, capacitor C 13 and resistance R 36, R37, R38, R39, R40, R41 and R42 constitute, wherein 3 pin of integrated package UA2 are connected through the output terminal of resistance R 36 with the energy storage ignition control circuit, after being connected with 6 pin, 2 pin of integrated package UA2 are connected with triode Q16 collector electrode, resistance R 37 is serially connected between power source voltage Vcc and the triode Q16 collector electrode, ground connection behind the Q16 emitter serial connection diode D7, the Q16 base stage is connected with triode Q17 collector electrode, the Q17 collector electrode is connected in series back ground connection with resistance R 39, connect power source voltage Vcc behind the Q17 emitter series resistor R38, the Q17 base stage is connected with the contact of resistance R 40 with capacitor C 13, resistance R 40, capacitor C 13 is with after resistance R 41 is connected in series, one termination power voltage vcc, the output terminal of the other end contact fire high power valve, resistance R 42 is serially connected between the collector electrode of Q17 base stage and Q3.

The control circuit of high-frequency electronic igniter comprises high frequency generation circuit and energy storage ignition control circuit, and wherein the energy storage ignition control circuit is made of transient protective circuit, automatic power-off protecting circuit, fixed duty cycle generation circuit and automatic angle of flow control circuit; Transient protective circuit one end is connected with capacitor C 1, and the other end joins with ground, plays transient absorption and pressure stabilization function; Automatically power-off protecting circuit is connected with signal input part with fixed duty cycle generation circuit, when opening ignition switch or motor from horizontal blanking, plays power-off protection; Fixed duty cycle generation circuit is connected with automatic angle of flow control circuit, and this fixed duty cycle generation circuit output square signal is with the conducting of controlling automatic angle of flow control circuit and end; Automatically angle of flow control circuit is connected with the input end of high frequency generation circuit with the igniting high power valve, to realize the control to igniting; High frequency generation circuit is connected with the output terminal of igniting high power valve, and the negative sense that this circuit causes after mainly utilizing punch-through to take place boosts and realizes puncturing the conversion of energy next time, produces the effect of Continuous Breakdown discharge.

The present invention has been owing to adopted high frequency generation circuit and control circuit, compares with background technique to have the following advantages:

1, the first breakdown that changes former energy storage igniting is discharged for Continuous Breakdown repeatedly, improved energy conversion efficiency, produce more high-energy oxygen (airborne triplet oxygen is changed into singlet oxygen and ozone) and participate in oxidation reaction, accelerated the speed and the purity of combustion reaction.

Current direction changes with the generation of each punch-through when 2, working because of high-frequency ignition, between sparking-plug electrode, produced alternating magnetic field, the field intensity in this magnetic field directly acts on the fission of oxygen molecule and oil molecule, has effectively promoted the speed and the purity of burning, has improved firing effect.

Fig. 1 is a circuit diagram of the present invention.(Figure 1A, Figure 1B)

The invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1, high frequency generation circuit is by integrated package UA2(CA555), triode Q17, Q16, diode D7, capacitor C 13 and resistance R 36, R37, R38, R39, R40, R41 and R42 constitute, wherein 3 pin of integrated package UA2 are connected through the output terminal of resistance R 36 with the energy storage ignition control circuit, after being connected with 6 pin, 2 pin of integrated package UA2 are connected with triode Q16 collector electrode, resistance R 37 is serially connected between power source voltage Vcc and the triode Q16 collector electrode, ground connection behind the Q16 emitter serial connection diode D7, the Q16 base stage is connected with triode Q17 collector electrode, the Q17 collector electrode is connected in series back ground connection with resistance R 39, connect power source voltage Vcc behind the Q17 emitter series resistor R38, the Q17 base stage is connected with the contact of resistance R 40 with capacitor C 13, resistance R 40, capacitor C 13 is with after resistance R 41 is connected in series, one termination power voltage vcc, the output terminal of the other end contact fire high power valve, resistance R 42 is serially connected between the collector electrode of Q17 base stage and Q3.

Working principle: when low voltage signal of energy storage control circuit output, the igniting high power valve ends, spark coil is elementary to open circuit, ignition coil iron core demagnetizes rapidly, inferior line level circle produces the inductance gesture, simultaneously when distributed capacity was charged to the breakdown voltage condition, the spark plug gap produced the disruptive discharge phenomenon, and produced the negative sense phenomenon of boosting simultaneously.This moment, C13 two interpolar pressure reduction raise rapidly, electric current charges to C13 through the EB of Q17, the Q17 conducting, Q16 is conducting also, 2 pin of UA2 are triggered, the output of 3 pin high petentials, high power valve conducting, the elementary path of spark coil, secondary energy storage capacity changes course of discharge because of the high power valve conducting, discharges over the ground through high power valve being higher than under hundreds of times of voltage conditions of power supply voltage, and ignition coil iron core is magnetized rapidly, this moment, the C13 charging process ended, Q17 because of no current by ending, Q16 also ends, 6 pin of UA2 are triggered, high power valve ends, and repeats the disruptive discharge process.With this work repeatedly spark coil energy storage capacity be not enough to produce again and puncture required magnetizing and end during energy.The discharge frequency of this circuit is operated in 5～6KHz when breakdown voltage 15KV, discharge time 2MS.

As shown in Figure 1; the control circuit of high-frequency electronic igniter comprises high frequency generation circuit and energy storage ignition control circuit, and wherein the energy storage ignition control circuit is made of transient protective circuit, automatic power-off protecting circuit, fixed duty cycle generation circuit and automatic angle of flow control circuit.The annexation and the working principle of each circuit are as follows:

The transient protective circuit is made up of voltage-stabiliser tube D1 and capacitor C 2, and an end is connected the other end ground connection after D1 and the C2 parallel connection with capacitor C 1.Play transient absorption and pressure stabilization function.

Automatically power-off protecting circuit is by triode Q1; Q2; Q3; voltage-stabiliser tube D3; capacitor C 3; C8 and resistance R 4; R5; R6; R7 forms; resistance R 4 is serially connected between triode Q1 base stage and resistance R 2 and the diode D2 tie point; the Q1 grounded-emitter connection; the Q1 collector electrode is connected with an end of resistance R 7; capacitor C 3 is attempted by between Q1 collector electrode and the ground; the other end of resistance R 7 is connected the back and is connected with triode Q2 base stage with resistance R 5 one ends; the other end of R5 is connected with triode Q3 collector electrode; the Q2 collector electrode is connected with the interface of Q3 base stage with voltage-stabiliser tube D3 negative pole; the positive terminal ground connection of D3; resistance R 6 is serially connected between Q2 emitter and the Q3 collector electrode; the Q3 emitter connects power source voltage Vcc; the Q3 collector electrode also is connected with the end of current-limiting resistance R1 with resistance R 6 tie point places; signal input part is connected with diode D2 tie point with resistance R 2, and capacitor C 3 is connected between triode Q3 collector electrode and the triode Q9 base stage.This circuit working principle is, when signal is high petential, and the Q1 conducting, C3 discharges over the ground through Q1, the Q2 conducting, Q3 decides voltage and exports a voltage stabilizing for horizontal because of B; Q1 ends when signal is low voltage, and electric current charges to C3 through the EB of Q2, the Q2 conducting, and Q3 keeps stable output.When to stall, when being high petential as signal potential (parking spot is at seed region), power-off protection is finished by C8 automatically; it is low that fixed duty cycle generation circuit is output as high earlier back; C8 reverse charging this moment is to the Q9 conducting, and angle of flow control circuit is exported low potential, and high power valve ends.And when signal voltage is low potential (parking spot is at the angle of flow), Q1 ends, and the C3 current potential rises to Q2 to be ended, and Q3 ends, the circuit no current.

Fixed duty cycle generation circuit is by integrated package UA1(CA555), triode Q4, Q5, Q6, Q7, Q8, capacitor C 4, C5, C6, C7 and resistance R 3, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17 forms, resistance R 3 is serially connected between resistance R 2 and diode D2 tie point and the triode Q4 base stage, capacitor C 4 is attempted by between Q4 base stage and the power source voltage Vcc, the Q4 grounded-emitter connection, Q4 collector series connection resistance R 8 connects power source voltage Vcc, resistance R 9 is serially connected between 2 pin of Q4 collector electrode and integrated package UA1,6 pin of UA1 are connected with capacitor C 5 tie points with resistance R 10,7 pin of UA1 are connected with an end of resistance R 11, the other end of resistance R 11 with connect power source voltage Vcc after resistance R 10 is connected in series, capacitor C 6 is attempted by the R10 two ends, resistance R 10 be attempted by between power source voltage Vcc and the ground after capacitor C 5 is connected in series, 3 pin of UA1 are connected with triode Q5 base stage through resistance R 12, the Q5 grounded-emitter connection, the Q5 collector electrode connects power source voltage Vcc through resistance R 13, triode Q6 base stage connects power source voltage Vcc through resistance R 14, the Q6 grounded-emitter connection, the Q6 collector electrode connects power source voltage Vcc through resistance R 15, triode Q7 base stage is connected with the Q6 collector electrode, the Q7 grounded-emitter connection, the Q7 collector electrode connects power source voltage Vcc through resistance R 16, triode Q8 base stage is connected with the Q7 collector electrode, the Q8 grounded-emitter connection, the Q8 collector electrode connects power source voltage Vcc through resistance R 17, and capacitor C 7 is connected between Q5 collector electrode and the Q6 base stage.The working principle of this circuit is: be made of one 50% square wave signal generator UA1, R10, R11, C5, C6, Q5, R13, C7, R14 and Q6 form 3: 7 signal generator, 50% square wave is to be provided with for 3: 7 square waves provide the fixed proportion time that discharges and recharges, and can make 3: 7 waveforms constant under any speed conditions.Q7, Q8 such as are at the amplification circuits of voltage signal.The input signal maximum duty cycle of this circuit can not surpass 50%, and this condition can satisfy the signal dutyfactor scope of all igniters.When Q4 has high potential signal to come in, the Q4 conducting, UA1 is triggered, and 3 pin of UA1 are high petential, and 7 pin of UA1 end, the C5 beginning of charging, the Q5 conducting, Q6 ends; The Q7 conducting, Q8 ends; 2 pin of Q8 are high petential.Because of the Q5 conducting, when the conducting current potential of Q6 is arrived in the C7 reverse charging, the Q6 conducting, Q7 ends, the Q8 conducting, 2 pin of Q8 are low potential.When dutycycle reaches 50%, when the C5 current potential rose to the evoked potential of 6 pin of UA1,6 pin triggered, the UA1 counter-rotating, and the output of 3 pin low potentials, Q5 ends, and the C7 positive charge begins.Because of circuit has been set at the forward and reverse ratio that discharges and recharges is 3: 7, so 2 pin of Q8 output positive 3: 7 square signal (firing angle is 3, and the angle of flow is 7).

Automatically angle of flow control circuit is by triode Q9, Q10, Q11, Q12, Q13, Q14, Q15, diode D4, D5, capacitor C 9, C10, C11 and resistance R 18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33, R34, R35 forms, triode Q9 base stage connects power source voltage Vcc through resistance R 18, the Q9 emitter is through resistance R 20 ground connection, the Q9 collector electrode connects power source voltage Vcc through resistance R 19, triode Q10 base stage is connected with the Q9 emitter, the Q10 emitter is through resistance R 22 ground connection, the Q10 collector electrode connects power source voltage Vcc through resistance R 21, resistance R 23 and capacitor C 9 backs in parallel one termination Q10 collector electrode, the other end is connected with capacitor C 10, ground connection after capacitor C 10 is connected with resistance R 24, triode Q11 base stage is connected with the tie point of capacitor C 9 with capacitor C 10, the Q11 emitter is through resistance R 26 ground connection, the Q11 collector electrode connects power source voltage Vcc through resistance R 25, an end ground connection after resistance R 28 is connected with capacitor C 11, the other end is connected with the resistance R 42 of high frequency generation circuit, resistance R 27 1 ends are connected with the emitter of Q11, the other end is connected with resistance R 28, a termination triode Q12 base stage after resistance R 29 is connected with diode D4, the other end is connected with capacitor C 11 tie points with resistance R 28, the Q12 base stage also is connected with the Q11 collector electrode, the Q12 emitter is through resistance R 31 ground connection, the Q12 collector electrode connects power source voltage Vcc through resistance R 30, triode Q13 base stage is connected with the Q12 emitter through resistance R 32, the Q13 grounded-emitter connection, the Q13 collector electrode connects power source voltage Vcc through resistance R 33, the Q13 collector electrode also is connected with triode Q14 base stage, the Q14 grounded-emitter connection, the Q14 collector electrode connects power source voltage Vcc through resistance R 34, the Q14 collector electrode also is connected with triode Q15 base stage, the Q15 grounded-emitter connection, the Q15 collector electrode connects power source voltage Vcc through resistance R 35, diode D5 positive pole connects the Q15 collector electrode, the D5 negative pole is connected with the end of high frequency generation circuitous resistance R36, and be connected with the input end of igniting high power valve, the working principle of this circuit is: when fixed duty cycle generation circuit output high petential, the Q9 conducting, the Q10 conducting; C9, C10 are through R24, Q10 discharge, and Q11 ends, the Q12 conducting, and the Q13 conducting, Q14 ends, the Q15 conducting, the output of D5 no current, high power valve ends, the igniting beginning.When the fixed duty cycle circuit was low potential, Q9 ended, and Q10 ends.Electric current charges to C9 through R22, and through R24 Q11 conducting when C10 is charged to Q11 conducting current potential.This process changed with the time that discharges and recharges, and discharge time in the long duration of charge is just long; Discharge time in the short duration of charge is just short.This circuit can make angle of flow basic fixed in setting ON time.The circuit that R28, C11, D4, R29 form plays two effects; The one, do angle of flow compensating action in high velocity; The 2nd, do the discriminating voltage effect of high voltage protective.Q13, Q14, Q15 are the amplification circuits of Continuity signal, and D5 plays the check electric current when high-frequency work.

In addition: capacitor C 1 and diode D2 form the high frequency absorption of power supply, and resistance R 1 is a current-limiting resistance, and power vd D is an external power, and capacitor C 12 plays the high frequency absorption effect; Resistance R 2 is the biasing resistor of Q1, Q4.

High-frequency electronic ignition control circuit working principle is:

Energy storage section: when signal input part had high voltage signal to enter, circuit entered outage ignition operation state.The Q4 conducting, the output of UA1 high petential, while fixed duty signal generation circuit start, Q5, Q7, Q9, Q10, Q12, Q13, Q15 conducting at this moment, circuit output low potential, the igniter high power valve ends, and spark coil produces inductance gesture discharge igniting.The discharge igniting time remains to 30% o'clock of a light-off period time, and the C7 of fixed duty signal generation circuit is charged to and triggers Q6, the Q6 conducting, and Q8 is conducting also, and Q9, Q10 end, and angle of flow automatic control system starts.When the Q11 of angle of flow automatic control system is elevated to conducting voltage because of the C10 current potential, the Q11 conducting, Q12, Q13, Q15 end, circuit output high petential, the conducting of igniter high power valve, the elementary on state that enters of spark coil.

When signal input part had low voltage signal to enter, Q1 ended, and reference potential and automatic circuit breaking protective system enter outage time-delay state.When C3 began to be charged to the stopping potential of Q2, Q3 ended, the circuit no-voltage.

Q4 ends, and UA1 imports high petential.The dutycycle of UA1 was provided with by 5: 5, needed only signal dutyfactor less than 5: 5 o'clock, and the fixed duty cycle circuit can be stablized square wave of 3: 7 that changes by light-off period of output and use for angle of flow automatic control circuit.

HFS: when signal input high potential signal, accumulator output low potential, the igniter high power valve ends, and produces the disruptive discharge phenomenon.When punch-through produces, C13 produces the positive charge process because of the negative pole current potential increases sharply, Q17 is triggered and conducting rapidly, Q16 is conducting also, UA2 is triggered, the output high petential, the conducting that is triggered of igniter high power valve, the spark coil secondary current discharges through high power valve over the ground with the high voltage form, ignition coil iron core is magnetized rapidly, and spark coil stops the spark plug electric discharge phenomena because of current direction changes, and C13 loses the negative sense current potential and forward potential is gone up rapidly to the Q17 stopping potential, Q17 ends, Q16 also ends, and UA2 is set output LOW voltage, and the igniter high power valve ends, produce the disruptive discharge phenomenon again, so repeatedly when spark coil energy storage capacity can not provide enough disruptive discharge institute energy requirement till.

Automatically power-off protection is realized by Q8, C8, Q9 under the high petential situation.When high potential signal Q8 conducting during greater than 3: 7 signal times, the C8 reverse charging is to the Q9 conducting, circuit output this moment be low potential, the igniter high power valve ends.

Claims

1, a kind of high frequency generation circuit, it is characterized in that: this circuit is by integrated package UA2 (CA555), triode Q17, Q16, diode D7 capacitor C 13 and resistance R 36, R37, R38, R39, R40, R41 and R42 constitute, wherein 3 pin of integrated package UA2 are connected through the output terminal of resistance R 36 with the energy storage ignition control circuit, after being connected with 6 pin, 2 pin of integrated package UA2 are connected with triode Q16 collector electrode, resistance R 37 is serially connected between power source voltage Vcc and the triode Q16 collector electrode, ground connection behind the Q16 emitter serial connection diode D7, the Q16 base stage is connected with triode Q17 collector electrode, the Q17 collector electrode is connected in series back ground connection with resistance R 39, connect power source voltage Vcc behind the Q17 emitter series resistor R38, the Q17 base stage is connected with the contact of resistance R 40 with capacitor C 13, resistance R 40, capacitor C 13 is with after resistance R 41 is connected in series, one termination power voltage vcc, the output terminal of the other end contact fire high power valve, resistance R 42 is serially connected between the collector electrode of Q17 base stage and Q3.

2, a kind of control circuit of high-frequency electronic igniter is characterized in that: it comprises high frequency generation circuit and energy storage ignition control circuit; Wherein the energy storage ignition control circuit is made of transient protective circuit, automatic power-off protecting circuit, fixed duty cycle generation circuit and automatic angle of flow control circuit; Transient protective circuit one end is connected with capacitor C 1, and the other end joins with ground, plays transient absorption and pressure stabilization function; Automatically power-off protecting circuit is connected with signal input part with fixed duty cycle generation circuit, when opening ignition switch or motor from horizontal blanking, plays power-off protection; Fixed duty cycle generation circuit is connected with automatic angle of flow control circuit, and this fixed duty cycle generation circuit output square signal is with the conducting of controlling automatic angle of flow control circuit and end; Automatically angle of flow control circuit is connected with the input end of high frequency generation circuit with the igniting high power valve, to realize the control to igniting; High frequency generation circuit is connected with the output terminal of igniting high power valve, and the negative sense that this circuit causes after mainly utilizing punch-through to take place boosts and realizes puncturing the conversion of energy next time, produces the effect of Continuous Breakdown discharge.