CN201934239U - Digital direct current igniter of motorcycle - Google Patents

Abstract

The utility model relates to a digital direct current igniter of a motorcycle, which is characterized in that a single-chip microcomputer processor serves as a core of an ignition control circuit, outputs of a negative pulse separating circuit and a positive pulse separating circuit are respectively connected with a first input end and a second input end of the single-chip microcomputer processor, a first output end of the single-chip microcomputer processor controls igniting silicon controlled rectifier, a second output end of the single-chip microcomputer processor controls a switch power tube, the single-chip microcomputer processor controls a boosted circuit in a PWM (pulse-width modulation) way, the switch power tube belongs to a switch-type field-effect tube driven by low voltage, the igniter is further provided with a voltage-stabilizing filter circuit used for supplying direct current work power to the ignition control circuit, and the boosted circuit adopts a peak detection circuit. According to the technical scheme, the digital direct current igniter of the motorcycle can perform curve control along with revolving speed, obtains optimum igniting points, can be used widely and has reliable performance.

Description

Motorcycle digital dc point firearm

Technical field

The utility model relates to a kind of Motor Vehicle igniter, is specifically related to a kind of motorcycle digital dc point firearm.

Background technique

The principle of motor cycle ignitor and effect are to receive and store the ignition energy that magnetogenerator or power supply provide, and according to the igniting trigger signal determine ignition advance angle, at suitable time of ignition, the pulse of abrupt release ignition energy, offer the elementary of spark coil, go out high-tension electricity at the spark coil secondary induction, make spark plug produce discharge spark.The firing mode of motorcycle is varied, and commonly used has three kinds: inductive discharge formula battery ignition mode, capacitor discharge type battery ignition mode, capacitor discharge type magneto ignition mode.Three kinds of firing mode structure differences can not be exchanged during use.The igniting of inductive discharge formula is also referred to as solid-state ignition system.The maximum operating currenbt of general this ignition system is about 2～2.5 times of common capacitor discharge type battery ignition mode igniter maximum operating currenbt, and ignition energy is all more stable from low speed to high speed.But the spark coil that this firing mode is used is bigger than general point fire coil volume, cost is high, loss is big, heating value is big, the turn ratio is different, not general, and maintenance is inconvenient; Spoilage is higher relatively, thereby not liked by Market Consumer, and use amount relatively seldom.Modern motorcycle major part all is to adopt the capacitor discharge type ignition, is commonly referred to CDI.Capacitive discharge ignition is to rely on capacitor discharge to produce the ignition energy pulse, offers the elementary of spark coil, goes out high-tension electricity at the spark coil secondary induction, makes spark plug produce discharge spark.Capacitor discharge ignition system can be divided into capacitor discharge type magneto ignition system and capacitor discharge type battery ignition system by its power supply difference.The capacitor discharge type magneto ignition system is simple in structure, cheap, easy to use.But owing to be that magnetogenerator is directly powered, it is bigger that the capacitor terminal voltage is influenced by engine speed, and capacitor is the rechargeable energy deficiency under low speed and fast state, causes ignition energy on the weak side, causes the starting a cold engine difficulty easily, degradation under the high speed performance.For solving the problem of electric capacity rechargeable energy deficiency when low speed and the high speed, many medium-to-high grade motorcycles adopt the capacitor discharge type battery ignition system (DC-CDI) of direct current supplys.Usually common integrated DC-CDI igniter is mainly by the trigger impulse shaping circuit, angle control circuit is advanced in igniting, boost, vibrator circuit, discharge ignition circuit four parts are formed, as shown in Figure 1: trigger impulse is through resistance R 3, behind the pulse shaping nework that R4 and capacitor C 5 are formed, pass through detector diode D4 and speed-up capacitor C4 again, the positive pulse split circuit that resistance R 5 is formed and process detector diode D9 and speed-up capacitor C6, resistance R 14, the negative impulse split circuit that amplifying tube Q2 forms is delivered to pin 2 and the pin 7 of integrated IC1 respectively, positive pulse by pin 2 inputs is opened the IC1 internal switch, make the CSET quick charge of IC1 pin 11 and pin 12, pin 12 voltage waveform forward position amplitudes are 1/2 of pin 11 voltage waveform forward position amplitudes.After treating that positive pulse finishes, pin 11 slowly to the C9 discharge, makes pin 12 current potentials continue to raise through R16.Under the lower situation of engine speed, pin 13 integral voltages are greater than pin 12 integral voltages, and this moment, the F3 of IC1 inside was output as " 0 ".When the PC negative impulse occurs, realize once igniting.When engine speed is higher, the charging time constant of pin 13 is bigger, integral voltage is less than the integral voltage of pin 12, at this moment internal comparator BJ2, F3 are output as " 1 ", the effect of process or door, produce one and the identical triggering pulse of tick-over time at pin 10, but the phase place of this pulse is ahead of the trailing edge Δ θ of PC negative impulse.The size of phase advance angle degree Δ θ is relevant with engine speed, has so promptly realized the tracking engine speed change, adjusts the function of ignition advance angle automatically.Under the effect of pin 7 input negative impulses, pin 13 integrators are discharged rapidly, after the PC negative impulse finished, pin 13 restarted charging, enters the next circulating sampling cycle, had more than formed igniting and had advanced angle control circuit.By diode D3 igniting capacitor C 2 is charged simultaneously by boosting of forming of starting resistance R12, feedback resistance R13, capacitor C 12, clamper protection diode D7, D11 and power tube Q7 and boosting transformer T1, vibrator circuit.By igniting capacitor C 2 and clamp diode D8, discharging thyristor Q5, and the discharge ignition circuit of forming with the external spark coil of igniter is when having igniting output control signal (IC1 pin 10 output high level), in the moment of discharging thyristor Q5 triggering and conducting, capacitor C2 discharges rapidly to the spark coil primary air through controllable silicon anode and negative electrode, discharge current changes the magnetic flux of spark coil rapidly, on spark coil is secondary, induce high-tension electricity, make spark plug produce spark, compressed mixed gas explosive burning in the cylinder, externally do work, realized the ignition function of igniter.Because what adopt is that the analog IC thereby the angular curve control of lighting a fire are not too accurate.In addition, commonly boost, the vibrator circuit power tube uses is electric current scale-up version triode, make boost, the output energy was ascending when vibrator circuit started, and made that the output energy of boosting transformer T1 is also ascending, to the charging voltage climbing of igniting capacitor C 2 on average about 24V/ms.Along with engine speed raises, the also corresponding shortening of time effective period of boosting transformer T1 output energy, starting under the 12000r/min fast state, charging voltage to igniting capacitor C 2 is also dropped to about 140V by maximum value 240V, the high speed ignition energy obviously descends, and directly has influence on the fuel economy and the power character of motorcycle.For this reason, general general point firearm strengthens the output power of transformer T1 by the parameter of adjusting boosting transformer T1, but causing the moment maximum operating currenbt of power tube Q7 also to increase when strengthening transformer T1 output power, is triode owing to what adopt, maximum collector current I _CGenerally little, be subjected to its restriction, promote transformer T1 output power and be and limitedly (generally adopt TIP41C, its collector current I _C=6A).In addition, be that the common integrated IC thereby the angular curve control of lighting a fire are not too accurate owing to what adopt.Ignition advance angle is one of important parameter that influences engine performance, each given engine operation condition all corresponding an optimum igniting advance angle, too early or cross lag ignition, all can directly have influence on the fuel economy and the power character of motorcycle.For this reason, common simulation IC advances the raising that the angle control circuit core has hindered the igniter performance as igniting.Along with development of science and technology, also more and more higher to the motor cycle ignitor performance demands, improve the igniter ignition energy and also become main research objective.

Summary of the invention

The utility model purpose be to provide in order to overcome the deficiencies in the prior art a kind of can be with rotating speed March line traffic control, obtain that optimum igniting point, applicability are wide, the motorcycle digital dc point firearm of reliable performance.

In order to address the above problem, the technical solution adopted in the utility model is: a kind of motorcycle digital dc point firearm, comprise the trigger impulse shaping circuit, negative impulse split circuit and positive pulse split circuit, angle control circuit is advanced in igniting, with boosting transformer and switching power tube is booster circuit and the discharge ignition circuit that core constitutes, it is characterized in that: it is core with the processor of single chip computer that angle control circuit is advanced in described igniting, the output of negative impulse split circuit and positive pulse split circuit is connected respectively to first and second input ends of processor of single chip computer, the first output terminal control ignition controllable silicon of processor of single chip computer, described igniting controllable silicon is connected in the discharge loop of discharge ignition circuit, second output terminal of processor of single chip computer is controlled described switching power tube, described processor of single chip computer is controlled booster circuit in the PWM mode, described switching power tube is a low-voltage driving switching mode field effect transistor, described igniter also is provided with filter circuit of pressure-stabilizing and advances angle control circuit for described igniting dc supply is provided, and booster circuit adopts peak detection circuit.

Because it is the control core with the single-chip microcomputer that angle control circuit is advanced in igniting of the present utility model, utilize the quick computing and the control function of single-chip microcomputer, realization is to the accurate curve controlled of advance angle of engine ignition, thereby make engine operation in the optimum state, changed that firing time can not be with rotating speed March line traffic control in traditional firing mode, can not obtain the optimum igniting point, can not make motor under any speed conditions, can both bring into play the shortcoming of good behaviour, and adopt the control mode of PWM, make when boosting transformer starts with constant high-power output, improved charging voltage climbing to igniting electric capacity, utilize metal-oxide-semiconductor to replace triode as the boost power pipe, its heating value is low, and improved to the igniting capacitor C 3 the charging voltage climbing, on average about 45V/ms, under motor 12000r/min fast state, to the igniting capacitor C 3 charging voltage also about 200V.Booster circuit adopts peak detection circuit; reduced of the loss of high tension protection circuit leakage current, improved igniting capacitor C 3 voltages 6～8V, improved ignition energy ignition energy; satisfied the requirement of motor, motorcycle power performance and Economy are significantly improved the igniter high speed performance.

Below in conjunction with the drawings and specific embodiments the utility model is described further.

Description of drawings

Fig. 1 is existing common simulation dc point firearm circuit theory diagrams;

Fig. 2 is the utility model specific embodiment circuit theory block diagram;

Fig. 3 is the utility model specific embodiment circuit theory diagrams.

Embodiment

As shown in Figure 2, motorcycle digital dc point firearm comprises that trigger impulse shaping circuit, negative impulse split circuit and positive pulse split circuit, igniting advance angle control circuit, be booster circuit and the discharge ignition circuit that core constitutes with boosting transformer and switching power tube.Described booster circuit adopts peak detection circuit.

As shown in Figure 3, the dc supply that angle control circuit is advanced in igniting is provided by filter circuit of pressure-stabilizing, filter circuit of pressure-stabilizing is made up of resistance R 3, R6 and capacitor C 5, C7, C9, C10 and diode D4, inductance L 1 and three terminal regulator Q2, has improved the stability of igniter control system power supply and the anti-interference of system.It is core with processor of single chip computer IC2 that angle control circuit is advanced in igniting, the negative impulse split circuit is by detector diode D9 and speed-up capacitor C13, resistance R 17, filter capacitor C15, amplifying triode Q4, biasing resistor R7, filter capacitor C16, clamp diode D10 forms, amplifying triode Q4 selects the NPN type for use, biasing resistor R7 is connected between the collector electrode and dc power anode of amplifying triode Q4, amplifying triode Q4 base earth, filter capacitor C16 and clamp diode D10 are connected in parallel between base stage and the collector electrode, filter capacitor C15 is connected in parallel between base stage and the emitter, detector diode D9 be connected on the emitter of amplifying triode Q4 after the parallel branch of speed-up capacitor C13 and resistance R 17 is connected; The positive pulse split circuit is by detector diode D5 and speed-up capacitor C6, resistance R 5, filter capacitor C14, amplifying triode Q3, biasing resistor R8, filter capacitor C8 forms, amplifying triode Q3 selects the NPN type for use, biasing resistor R8 is connected between the collector electrode and dc power anode of amplifying triode Q3, amplifying triode Q3 grounded-emitter connection, filter capacitor C8 is connected in parallel between the collector and emitter of amplifying triode Q3, filter capacitor C14 is connected in parallel between the base stage and emitter of amplifying triode Q3, detector diode D5 be connected on the base stage of amplifying triode Q3 after the parallel branch of speed-up capacitor C6 and resistance R 5 is connected; The trigger impulse shaping circuit that resistance R 15 and resistance R 16 backs in parallel and capacitor C 12 connect to form, capacitor C 12 1 ends are connected with power supply ground, the other end PC of trigger impulse shaping circuit constitutes input end, the detector diode D5 anode in described positive pulse split circuit and the negative impulse split circuit be connected on jointly on the other end of capacitor C 12 after detector diode D9 negative electrode is connected.The collector electrode of amplifying triode Q3 is connected with the data input end (as second input end) of processor of single chip computer IC2, and the collector electrode of amplifying triode Q4 is connected with another data input pin (as first input end) of processor of single chip computer IC2.The igniting controllable silicon is connected the discharge loop of the end formation discharge ignition circuit of power supply ground and igniting capacitor C 3, the data output terminal (as first output terminal) of processor of single chip computer IC2 is connected the control ignition controllable silicon with igniting controllable silicon trigger electrode, described igniting controllable silicon is connected in the discharge loop of discharge ignition circuit, switching power tube Q7 is connected between the elementary winding and power supply ground of boosting transformer, another data output end of processor of single chip computer IC2 (as second output terminal) control switch power tube Q7, processor of single chip computer IC2 controls booster circuit in the PWM mode, switching power tube Q7 selects low-voltage driving switching mode field effect transistor for use, and I _DThe high-current low-voltage driving switch type field effect transistor of 〉=30A is good.For guarantee point firearm reliably working; prevent that high pressure output from exceeding setting value; can also be provided with high tension protection circuit in the utility model; described high tension protection circuit is by diode D11; resistance R 11; peak voltage sample circuit that the series arm that voltage-stabiliser tube D6 and resistance R 20 are in series successively constitutes and switch triode Q6 and biasing resistor R10 constitute; described voltage sample circuit is connected across between boosting transformer secondary the high pressure sampling winding output terminal and ground; the tie point of voltage-stabiliser tube D6 anode and resistance R 20 is connected with switch triode Q6 base stage as the sampling output point of voltage sample circuit; switch triode Q6 emitter is connected with power supply ground; biasing resistor R10 is connected between the collector electrode and dc power anode of switch triode Q6, and the collector electrode of switch triode Q6 is connected with another data input pin of processor of single chip computer IC2 (as the 3rd input end) as the output of high tension protection circuit.Like this, after exceeding setting value at voltage, the overvoltage signal is delivered to the data input pin of processor of single chip computer IC2 through high tension protection circuit, and processor of single chip computer IC2 closes the PWM output of boosting after to the overvoltage signal response, prevents that high pressure from continuing rising spot failure firearm.

Claims (2)

1. motorcycle digital dc point firearm, comprise the trigger impulse shaping circuit, negative impulse split circuit and positive pulse split circuit, angle control circuit is advanced in igniting, with boosting transformer and switching power tube is booster circuit and the discharge ignition circuit that core constitutes, it is characterized in that: it is core with the processor of single chip computer that angle control circuit is advanced in described igniting, the output of negative impulse split circuit and positive pulse split circuit is connected respectively to first and second input ends of processor of single chip computer, the first output terminal control ignition controllable silicon of processor of single chip computer, described igniting controllable silicon is connected in the discharge loop of discharge ignition circuit, second output terminal of processor of single chip computer is controlled described switching power tube, described processor of single chip computer is controlled booster circuit in the PWM mode, described switching power tube is a low-voltage driving switching mode field effect transistor, described igniter also is provided with filter circuit of pressure-stabilizing and advances angle control circuit for described igniting dc supply is provided, and described booster circuit adopts peak detection circuit.

2. according to the described motorcycle digital dc point of claim 1 firearm; it is characterized in that: also be provided with high tension protection circuit; described high tension protection circuit is by resistance; honeybee threshold voltage sample circuit that the series arm that voltage-stabiliser tube and diode are in series constitutes and switch triode and biasing resistor constitute; described voltage sample circuit is connected across between boosting transformer secondary the high pressure sampling winding output terminal and ground; the sampling output point of voltage sample circuit is connected with the switch triode base stage; the switch triode emitter is connected with power supply ground; biasing resistor is connected between the collector electrode and dc power anode of switch triode, and the collector electrode of switch triode is connected with the 3rd input end of processor of single chip computer as the output of high tension protection circuit.

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