CN2128313Y - Bidirectional medium-frequency ignitor for car - Google Patents

Abstract

The utility model relates to a bidirectional medium-frequency ignitor for a car. The utility model is characterized in that the sparking generated comprises capacitive sparking and inductive sparking, which are superposed in one pulse, except the reliable circuit performance and self-protection function the utility model also has the delay ignition function in the idling condition of the car to decrease the pollution of the exhaust emission to the environment. The car fuel saving ratio of the utility model is higher 50% than the car fuel saving ratio of present ignitors, the exhaust emission is decreased by 50%-90%, the power performance is improved by 5%, the ignition ratio is 100%, the cold starting performance is good, the car can be started normally in below zero 30DEG. C, no preheating is needed, and the high speed performance is enhanced.

Description

Bidirectional medium-frequency ignitor for car

The utility model relates to a kind of two-way intermediate-frequeney point firearm that is used for automobile.

In CN10131398, related to a kind of " high-frequency igniter of double-spark source ", the ignition system that this igniter is made up of two relatively independent controlled current sources (capacitive) and controlled voltage source (perception).Its working principle is to be exported by biswitch power, double source synchronous circuit and spark coil primary circuit produce perceptual pulse earlier, again by pressing resonance circuitry to produce the high frequency capacitive signal in inverter circuit and the high frequency, both perceptual spark is preceding, the capacitive spark after, the two independent action and closely linking, and in firing time, successively send the alternation spark, make mixed gas quick thereby reach, burning fully, produce the power of breaking out more greatly, reduce the effect of exhaust emissions and fuel-economizing, but this igniter is also not really perfect, show following several respects at least: (one) analyzes from the mechanism of transistor pulse igniting, this perceptual spark is preceding, the capacitive spark after firing mode, to improving some energy and effect, be not effective and efficient manner.(2) because this ignition mechanism does not have idling ignition lag system, to reducing the effect instability of auto idle speed exhaust emissions.(3) this igniter does not have the oncontacting device, also needs to be controlled by the switching of platinum contact.(4) bigger contravariant transformer of volume and capacitor are arranged in this igniter, be unfavorable for modularization production.

In us-4228778, disclosed a kind of lasting spark discharge ignition system of forming by high-voltage capacitance discharge and magnetic storage energy discharge.Adopt the capacitor discharge spark preceding, the inductive discharge spark after method improved the ignition energy of internal-combustion engine.From its structure, be to provide pulse by switching on and off of some analog switches, rather than two relatively independent energy provide system continuously, from the spark form of expression, belong to unidirectional pulse, and blanking time is longer, and pulse number is only several, with regard to spark performance, its amplitude is not high, energy disperses, and can not give full play to usefulness in 0.7 millisecond initial working lipe, does not have idling delayed firing and contactless control system at this igniter of function aspects in addition.

The purpose of this utility model is that will to seek a kind of output energy big, and the spark quality is good, can further stably improve oil-saving effect, and cold starting performance, power character, acceleration are all good; Can stably reduce exhaust pollution significantly, and can make its highly versatile, can be fit to the igniter for automobile of the novel contactless control of modularization, modularization production.

The purpose of this utility model is achieved in that by the two-way power switch circuit, two-way prefix switch control circuit and bistable oscillation circuit have been formed two groups of independently switch poweies, make capacitive spark and perceptual spark superimposed in same pulse, and make the positive and negative alternation of this pulse, produce a string intermediate-freuqncy signal and be added on the spark coil primary circuit, make the spark coil secondary send the intermediate frequency spark that energy is very big, amplitude is very high.Ignition timing control circuit is to be used for adjusting the length of firing time and time of ignition.Its working state both can be controlled by the signal of non-contact switch circuit, can be controlled by the switching signal of platinum contact again, thereby had improved the versatility of igniter.Igniting idling time-delay automatic control circuit is when being used for controlling motor and entering the idling work situation, automatic time delay to time of ignition, and when motor entered other working condition, time of ignition withdrawed from time-delay automatically, to guarantee the stable significantly decline of engine idle exhaust emissions.Non-contact switch circuit is the function that is used for substituting platinum contact in the distributor, has prolonged the working life of distributor, improves the stability of switching signal, and it both can be separately as monopulse igniting, other various transistor ignitors of may command again.Excess voltage protection is the size that is used for adjusting ignition energy; when power supply reached 18 volts, ignition energy suitably reduced, when voltage surpasses 22 volts; igniter quits work, and makes reason spot failure firearm and spark coils such as generator voltage rising owing to regulator is malfunctioning to avoid being in operation.

Two-way intermediate-frequeney point firearm, form ignition system by two groups of relatively independent controlled switching power supplies, at the needs time of ignition, two groups of switch power alternations, the endurance that produces a succession of medium-frequency pulse and spark can be adjusted, can continuity be arranged measurer, be not subjected to the influence of rotating speed, compatible energy and perceptual energy are in same pulse, compatible energy was used for improving pulse amplitude in the extremely short time in this pulse, in the long time, guarantee the calorific value of pulse spark in order to breakdown electrode gap perception energy, thereby make each pulse all have very high energy stack, make mixed gas burning rapidly more fully, and make the stable significantly decline of exhaust emissions with effective idling IGNITION CONTROL, make the oil consumption of motor lower, power character, acceleration all is significantly improved.And the igniting requirement of suitable lean-combustion engine, thereby reach purpose of the present invention.

The interior circuit of frame of broken lines is a basic circuit diagram of the present utility model in the accompanying drawing.

Describe an embodiment's of the utility model circuit structure and principle and function in detail below in conjunction with accompanying drawing.

As figure; automobile double is to receive the igniting distributing signal that magnetic pole 2 sensings are come from distributor by the electromagnetic coil in the non-contact switch circuit I 1 earlier to the intermediate-frequeney point firearm; by diode 3; resistance 4; reference diode 5 carries out shaping to this distributing signal; switching signal after the shaping inputs to the input end of operational amplifier 6; amplify through 6 pairs of these signals of operational amplifier; be controlled in the on off state of triode 8 by diode 7 with the switching signal after this amplification; wherein resistance 9 is the inclined to one side value resistance of operational amplifier 6; resistance 10; the 11st, the biasing resistance of triode 8, diode 12 is used for preventing inverse peak voltage, electric capacity 13 is used for protecting triode 8.Be loaded in the distributor because non-contact switch circuit is the pattern of assembly, therefore both can have directly replaced the function of original platinum contact, be used for the pulse igniting of inductance type, can be used for controlling two-way intermediate-frequeney point firearm or other transistor ignitor again.

The ignition timing control circuit II is the switching signal that is controlled by the non-contact switch circuit I, or directly be controlled by the switching signal of platinum contact in the distributor, this switching signal is through diode 14,15, electric capacity 16, resistance 17 formation time pulse signals, this signal is by triode 18, after resistance 19 amplifies, through diode 20, the working state of bistable oscillation circuit V is gone to control in triode 21 anti-phase amplifications by diode 22,23.The excess voltage protection III is by reference diode 24; resistance 25 is formed; when voltage raises; when surpassing 20 volts, the reference diode conducting, this conducting electric current inputs to triode 21 in the ignition timing control circuit II by resistance 25; make triode 21 be in saturation state; thereby bistable oscillation circuit V is quit work, and two-way prefix switch control circuit VI and two-way power switch circuit also quit work, and have therefore prevented that each circuit from damaging because of operating overload.

Bistable oscillation circuit V is the triode 21 that is controlled by in the ignition timing control circuit II, when triode 21 is in saturation state, make the triode 26 in the bistable oscillation circuit V be in cut-off state by diode 22,23 respectively, triode 27 collector electrodes are in low potential.When the triode in the ignition timing control circuit II 21 is in cut-off state, bistable oscillation circuit V enters the working state of vibration at once, collector electrode by triode 26,27 is alternately exported square-wave signal, resistance 28,29 in the bistable oscillation circuit V is respectively the biasing resistor of triode 26,27, resistance 30,31, the parameter of electric capacity 32,33 has determined the oscillation frequency of this circuit.By adjusting their parameter, guarantee the conformity of two groups of square-wave signals.

Two-way prefix switch control circuit VI is made up of two-part, and wherein one one is the preposition control circuit of forward current (1).It is the square-wave signal by the collector electrode output of the triode 26 in the bistable oscillation circuit V, input to the base stage of triode 35 through resistance 34, be controlled in the on off state of triode 35, the conducting that this switching signal one tunnel is controlled in the triode 38 in the two-way power switch circuit VII through resistance 36, diode 37 with end, thereby the break-make of the forward current of control ignition coil 70.The on off state of another road control triode 39, switching signal by the output of triode 39 collector electrodes, be controlled in the on off state of the triode 41 in the two-way power switch circuit VII through diode 40, and make the on off state of the on off state of triode 41 and triode 38 synchronous.Another part of two-way prefix switch control circuit VI is the preposition control circuit of back current, it is the square-wave signal by the output of triode 27 collector electrodes in the bistable oscillation circuit V, input to triode 43 through resistance 42, be controlled in the on off state of triode 43, collector electrode output by triode 43, one the tunnel through resistance 44, diode 45, be controlled in the on off state of the triode 46 in the two-way power switch circuit VII, another road is connected to the base stage of triode 47, is controlled in triode 49 in the two-way power switch circuit VII by the switching signal of the collector electrode of triode 47 output through diode 48.And make the on off state of triode 46,49 synchronous, thereby the break-make of the back current of control ignition coil 70. Resistance 50,51,52,44 in the two-way prefix switch control circuit VI is respectively the biasing resistor of triode 35,39,43,47.Electric capacity the 53, the 54th in order between two output signals corresponding delay time to be arranged, thereby guarantees that each triode can not damage because of excess current in the two-way power switch circuit VII.

Two-way power switch circuit VII is that two groups of phase differences that are controlled by two-way prefix switch control circuit VI are the switching signals of 180 degree, the switching signal of these two groups of phase differences, 180 degree, guaranteed the on off state synchronised of the on off state and the triode 41 of triode 38 respectively, the on off state synchronised of the on off state of triode 46 and triode 49.These two groups of switching signals have also guaranteed when triode 38; during 41 conductings; triode 46; 49 must end; when triode 46; triode 38 during 49 conductings; the 41 alternation states that just must end; thereby once being held, spark coil 70 just forming one; reverse alternating current; and make the spark coil secondary terminals produce the intermediate frequency inductance spark of a series of alternation; electric capacity 55; 56; 57; the 58th, be used for protecting triode 49 respectively; 41; 46; 38 unlikelyly damage because of the inductance surge voltage punctures, simultaneously electric capacity 55; 56; 57; provide for 58 early stages that also can be ignition spark an amplitude very high; the time compole short capacitive spark.The size of compatible energy depends on the capacity parameter of each electric capacity.Idling spark delay automatic control circuit IV is the switching signal by the output of triode 18 collector electrodes in the time of ignition control circuit II, signal source as idling spark delay automatic control circuit IV, this signal is exported by the collector electrode of triode 59 after triode 59 amplifies, through isolating diode 60, be added to resistance 61, the two ends of electric capacity 62 form a voltage signal that changes along with the switching signal frequency change of triode 59 outputs at these two ends.When the switching signal frequency is low, both shown that engine operation was under idling mode, at this moment the voltage of voltage signal is just higher, when the signal of this high petential is elevated to certain value, reference diode 63 conductings, at this moment triode 64 also begins conducting, because the conducting of triode 64, a feasible end ground connection that is connected to the electric capacity 65 of collector electrode, and electric capacity 65 one be terminated at resistance 17 in the time of ignition circuit and 66 mid point, make electric capacity 65 constitute a charge circuit, its charge circuit is such: when the disconnection of A point contact needs igniting, midpoint potential between the resistance 17 and 66 begins to raise, because this point inserts electric capacity 65, this current potential begins through electric capacity 65, constitute a charge circuit by triode 64, the rising of this current potential thus, the time length that depends on charging, again because time of ignition depends on the height of this current potential, igniting when current potential is high, current potential stops igniting when low, because the time-lag action of electric capacity 65, make motor when idling, each igniting has obtained a time-delay in short-term, therefore the exhaust emissions in the time of can significantly reducing engine idle, the discharge loop of electric capacity 65 is when contact A is closed, by the positive electrode resistance 66 of electric capacity 65, diode 14, grounding end is through the negative pole end of diode 67 to electric capacity 65, its discharging time is whether to be controlled by the switching of contact A, the resistance 68 in the circuit, the 69th, triode 59,64 biasing resistor.

Using two-way intermediate-frequeney point firearm described in the utility model to compare with existing igniter has:

1, fuel-saving efficiency is remarkable, and existing up-to-date igniter fuel-economizing is more than 15%, and igniter of the present invention is again fuel-economizing 5% on this basis.

2, because mixture combustion is abundant, thereby stably reduce significantly exhaust pollution, pollution emission reduces 50%-90%.

3, good dynamic property improves 5% than existing up-to-date igniter.Improved the output power of motor.

4, than prior art engine ignition rate height, strengthened high speed performance, lighting rate is 100%

5, starting performance is good, but cold car one push start success does not need " heating " and ancillary methods such as " larries ", and cold starting performance is under subzero 30 ℃ of situations, but normal starting does not still need preheating.

6, acceleration performance is good, and at same class, under the same operation situation, the time for acceleration that obtains maximum speed reduces 60%, thereby has improved the passing ability of automobile and climbed wave energy power.

7, long service life because idling spark delay automatic control circuit and excess voltage protection are housed, can be protected device proper.

8, the little suitable modularization of volume, the requirement that modularization is produced.

9, versatility is good, and non-contact switch circuit and igniter can be distinguished use separately.

Claims (7)

1, a kind of two-way intermediate-frequeney point firearm that is used for automobile; it is characterized in that being connected with the ignition timing control circuit II and being connected by triode 21 with the excess voltage protection III by non-contact switch circuit I; triode 59 is connected circuit II, III again with idling spark delay automatic control circuit IV; triode 26,27 in the bistable oscillation circuit V is connected with two-way prefix switch control circuit VI by resistance 34,42 respectively, and two-way power switch circuit VII is connected with two-way prefix switch control circuit VI by diode 37,40,45,48 and is formed.

2, a kind of automobile double as claimed in claim 1 is to the intermediate-frequeney point firearm, it is characterized in that two-way power switch circuit VII is connected with spark coil 70 with triode 41,49, electric capacity 56,55 by triode 38,46, electric capacity 58,57, produce the spark of two groups of phase differences 180 degree, triode 46,49 respectively with two-way prefix switch control circuit VI in triode 47 base stages be connected with collector electrode.Triode 41,38 respectively with two-way prefix switch control circuit VI in the base stage of triode 39 be connected with collector electrode, electric capacity 55,56,57,58 is connected to the emitter and collector two ends of triode 49,41,38,46 respectively.

3, a kind of automobile double as claimed in claim 1 is to the intermediate-frequeney point firearm, it is characterized in that two-way prefix switch control circuit VI is made up of with diode 37,45,40,48 triode 35,39,43,47 and is connected with the circuit V by resistance 34,42.

4, a kind of automobile double as claimed in claim 1 to the intermediate-frequeney point firearm, it is characterized in that bistable oscillation circuit V is by triode 26,27, electric capacity 33,32, resistance 28,29,30,31 is formed, resistance 34 is connected with the collector electrode of triode 26, resistance 42 is connected with the collector electrode of triode 27, and the collector electrode of the base stage by triode 26, triode 27 is connected with diode 22,23 in the ignition timing control circuit II respectively.

5, a kind of automobile double as claimed in claim 1 is to the intermediate-frequeney point firearm; it is characterized in that the ignition timing control circuit II is connected with V by diode 22,23; triode 21 base stages are connected with the excess voltage protection III; and be connected with idling spark delay automatic control circuit IV by diode 20; A point in the circuit is connected with the ignition timing control circuit II, can connect the platinum contact in distributor again.

6, a kind of automobile double as claimed in claim 1 is to the intermediate-frequeney point firearm, it is characterized in that idling spark delay automatic control circuit IV is connected with the collector electrode of triode 18 in the ignition timing control circuit II by the base stage of triode 59, and again by being attached thereto between the resistance 17 and 66 in electric capacity 65 and the ignition timing control circuit II.

7, a kind of automobile double as claimed in claim 1 is to the intermediate-frequeney point firearm, it is characterized in that the non-contact switch circuit I is made up of electromagnetic coil 1, diode 3, resistance 4, reference diode 5, operational amplifier 6, compound transistor 8 and A point, be connected with diode 14 in the ignition timing control circuit II by the A point.

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