CN101319645B - Novel automotive ignition system - Google Patents
Novel automotive ignition system Download PDFInfo
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- CN101319645B CN101319645B CN2008101501172A CN200810150117A CN101319645B CN 101319645 B CN101319645 B CN 101319645B CN 2008101501172 A CN2008101501172 A CN 2008101501172A CN 200810150117 A CN200810150117 A CN 200810150117A CN 101319645 B CN101319645 B CN 101319645B
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Abstract
The invention relates to a novel automotive ignition system which is capable of enhancing the ignition spark energy in the clearance of a spark plug, in particular to enlarging the initial ignition spark energy in the clearance of the plug; the spark is connected with a bootstrap energy enhancing device; the bootstrap energy enhancing device is connected with a low-turn ratio and lower-consumption ignition coil. The system comprises a transistor igniter control circuit; in the transistor igniter control circuit, the low-turn ratio and lower-consumption ignition coil is connected with a micro-consumption high-voltage damper line; the micro-consumption high-voltage damper line is connected with the spark plug with a built-in inductor.
Description
One, technical field:
The present invention relates to a kind of automotive ignition system, especially relating to a kind of mainly is at no Carburetor, no distributor, is controlled the novel automotive ignition system of the electronic fuel injection engine automobile of fuel injection and igniting by computer.
Two, background technique:
The ignition energy (, mainly analyzing the energy of two point formula ignition circuit) of existing EFI car referring to Fig. 1:
As can be seen from Figure 1 the ignition system of existing EFI car is made up of transistor ignitor, spark coil, high voltage damper, built-in resistor spark plug.In this ignition system, transistor ignitor is the electronic switch of the hard to bear external signal control of energy, and it determines the conducting of transistor T 1 according to external signal and ends; Spark coil is energy storage, high voltage production part, and what of its energy storage have determined the size of plug ignition spark energy, the height of its output voltage to determine that can the spark plug gap breakdown and form ignition spark.It is in the T1 conducting, energy storage during the primary air energising, produce a few hectovolt voltages at the C point during outage, it is secondary to be coupled to spark coil together with elementary energy storage, produce 2.5 ten thousand volts of above high voltage, by high voltage damper, the spark plug built-in resistor is added in the place, spark plug gap with high voltage, and the puncture gap, produce the high-voltage spark mixed gas in the gas cylinder that releases energy.
In existing ignition system:
V＝12(V) R1：0.3～0.7(Ω) L1：0.003-0.006(H)
R2≥8.0KΩ N≥80 RH：5-10(KΩ)
L2：30-60(H)
According to the principles of electric and electronic engineering:
In the existing EFI car, set primary air t current"on"time, t=0.0025～0.0036 (S) according to engine cylinder number and rated revolution.
From formula 1., 2. find out: elementary energy storage is relevant with L1, i, and i and R1, L1 have complicated exponential relationship.Because V is constant, during the design of generic point fire coil, at first determine the size of institute's energy requirement, according to institute's energy requirement, take into account other performance requirements of spark coil and provide the desired value that R1, L1 satisfy i.Generally speaking, less R1, L1 have bigger i value, and bigger R1, L1 have less i value.According to above discussion and actual measurement, the i value is generally in the 6.0-8.5A scope.
From top data, estimate the elementary energy storage of spark coil at 90-120mJ, primary and secondary conversion efficiency 0.75, promptly secondary energy is between 70-90mJ.Because secondary ignition circuit D.C. resistance is bigger, generally at 20-30K Ω, the loss of energy in transmission course makes the ignition spark energy at place, spark plug gap only account for about 30% of secondary total energy; In addition, turn ratio is bigger, can not form big initial ignition spark energy.
Through estimation, place, spark plug gap ignition spark energy is about 30mJ.
Method of measurement:
Fig. 2 is the measuring circuit connection diagram:
Spark coil parameter (Citroen zx 988 is used spark coil)
L1＝0.005(H) R1＝0.62(Ω) N＝90
L2＝40.5(H) R2＝8.3KΩ
i＝6.8A E1＝116mJ
The measurement project:
After a, detailed measurements spark plug gap were breakdown, voltage dropped to the energy (being the initial ignition spark energy) of the value of keeping from maximum value.
B, measurement ignition spark energy in holding time.
C, measuring condition: room temperature, atmospheric pressure state.
Method of measurement:
Tested ignition circuit is the two point formula
A, spark plug gap are 3mm, refer to that this spark plug corresponding cylinder is not in compression stroke; The spark plug gap is 11mm, refers to that this spark plug corresponding cylinder mixed gas is compressed, is about to the work done of lighting a fire.
B, when the dual ignition plug gap is breakdown, measure average voltage, then the electric current by Ra at a certain period Ta resistance R a
Measure the average voltage on a certain period Ta resistance R B, then
C, at ignition spark energy=VaTaIa of a certain period Ta.
Measurement result:
Initial ignition spark energy 3.0mJ
Ignition spark energy 25.6mJ holds time
Total ignition energy 28.6mJ
Improve the feasibility of existing ignition system ignition spark energy:
Improve the ignition spark energy, at first to make the elementary ability of spark coil with storage macro-energy, from 1., 2. formula as can be seen, when V is constant, the mutual restriction of R1, L1, i relation, only reduce R1, reduce L1 in right amount, i is increased, just might increase the elementary energy storage of spark coil, but elementary energy storage does not have too big raising however.The artificial i that makes increases, after elementary energy storage strengthens, being coupled to secondary energy increases, secondary energy increases, mainly be that secondary current increases, too big owing to D.C. resistance in secondary ignition circuit, secondary current increases, the loss of D.C. resistance is increased, the increase of this loss is directly proportional with current squaring, and the overwhelming majority that increases energy is in other words consumed by D.C. resistance, and the spark energy increase at place, spark plug gap seldom, thus, existing ignition system can not be greatly improved at the ignition spark energy at place, spark plug gap.
Three, summary of the invention:
The present invention provides a kind of novel automotive ignition system in order to solve the deficiency in the above-mentioned background technology, and the ignition spark energy that it can increase the place, spark plug gap particularly strengthens the initial ignition spark energy that the spark plug gap is located.
For achieving the above object, the technical solution used in the present invention is:
A kind of novel automotive ignition system, comprise the transistor ignitor control circuit, it is characterized in that: on the transistor ignitor control circuit, be connected with the bootstrapping energizer, the bootstrapping energizer is connected with the low turn ratio, low-loss spark coil, the low turn ratio, low-loss spark coil are connected with little loss high voltage damper, and little loss high voltage damper is connected with the spark plug of built-in inductance.
Above-mentioned bootstrapping energizer comprises control adjustment circuit, circuit is adjusted in control has the primary air of centre-tapped transformer to be connected with T3 with primary and secondary by transistor T2, primary and secondary has the secondary winding and the diode D1 of centre-tapped transformer, D2 connects, diode D1, D2 is in parallel and be connected with transistor T, primary and secondary have centre-tapped transformer secondary winding and with the low turn ratio, the elementary connection of low-loss spark coil, diode D3, moment suppresses diode DN and is connected in the secondary winding and the low turn ratio that primary and secondary has centre-tapped transformer successively, between low-loss spark coil elementary, moment suppresses diode DN and adjusts circuit with control to be connected.
Secondary resistance R2=360 Ω-1300 Ω of elementary resistance R1=0.4～0.7 Ω of the above-mentioned low turn ratio, low-loss spark coil, the primary inductance L1=0.008-0.015H of spark coil, spark coil, the secondary inductance L2=3-7.5H of spark coil, the inferior primary turns of spark coil (5) is than being 10-30.
Above-mentioned little loss high voltage damper is made of the inductance element of two insulating material, and inductance element is connected by high voltage wire, and D.C. resistance is 2 Ω-5 Ω, and inductance value L is 0.005-0.020H.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
With Citroen zx 988 oil, the dual-purpose car of gas is example.
Vehicle condition: operation 2.6 ten thousand km after new car dispatches from the factory
1, use gasoline or rock gas, starting, the gear shift acceleration performance obviously improves.When using rock gas, starting, the effect that the gear shift acceleration performance is better than original ignition system when using gasoline.
2, constant speed operation in 80km/ hour is saved rock gas 5.6% than former ignition system, and gasoline can't be measured because of the limitation of conditions.
3, technique effect:
When a, use gasoline, also have tangible oil-saving effect.
B, exhaust emissions can descend significantly.
C, adopted the lean combustion engine of turbocharging technology at 40: 1,65: 1 for air fuel ratio, super lean combustion engine adopted at the spark plug place 12: 1 or present situation that 13: 1 air fuel ratios are burnt can be greatly improved.
D, do not use electrode complicated or the spark plug of rare metal discharge sheet is housed, still have good igniting reliability.
Four, description of drawings:
Fig. 1 is the connection diagram of the existing two point formula ignition system of EFI car;
Fig. 2 is the measuring circuit connection diagram;
Fig. 3 is the circuit theory diagrams of ignition system of the present invention;
Fig. 4 is the circuit theory diagrams of bootstrapping energizer;
Fig. 5 adjusts the circuit theory diagrams of circuit I I for control in the bootstrapping energizer;
Fig. 6 is the connection diagram of bootstrapping energizer and former ignition system;
Fig. 7 is the built-in shapes of inductors schematic representation of spark plug;
Fig. 8 is the sectional drawing of little loss high voltage damper.
Among the figure, 1-has the transistor ignitor control circuit now, and 2-has two point formula spark coil now, circuit is adjusted in 3-control, and the 4-primary and secondary has centre-tapped transformer, and 5-hangs down the turn ratio, low-loss spark coil, the spark plug of the built-in inductance of 6-, 7-high temperature wire, 8-metallic material, the 9-ferromagnetic material, 10-insulating material, 11-inductance element, the 12-high-voltage conducting wires, 13-plain conductor, 14-outsourcing insulating material, the 15-soft magnetic material, the little loss high voltage damper of 16-.
Five, embodiment:
Referring to Fig. 3, Fig. 4, comprise existing transistor ignitor control circuit 1, on existing transistor ignitor control circuit 1, be connected with the bootstrapping energizer, the bootstrapping energizer is connected with the low turn ratio, low-loss spark coil 5, and the low turn ratio, low-loss spark coil 5 are connected with the spark plug HL of built-in inductance.The bootstrapping energizer comprises control adjustment circuit 3, circuit 3 is adjusted in control has the primary air of centre-tapped transformer 4 to be connected with T3 with primary and secondary by transistor T2, primary and secondary has the secondary winding and the diode D1 of centre-tapped transformer 4, D2 connects, diode D1, D2 is in parallel and be connected with transistor T1, primary and secondary have centre-tapped transformer 4 secondary winding and with the low turn ratio, the elementary connection of low-loss spark coil 5, diode D3, moment suppresses diode DN and is connected in the secondary winding and the low turn ratio that primary and secondary has centre-tapped transformer 4 successively, between low-loss spark coil elementary, moment suppresses diode DN and adjusts circuit 3 with control to be connected.The low turn ratio, low-loss spark coil 5 are connected with little loss high voltage damper 16, and little loss high voltage damper 16 is connected with the spark plug 6 of built-in inductance.Referring to Fig. 5, the control of bootstrapping energizer is adjusted in the circuit 3, resistance R 1 and resistance R 4 one end parallel connections, be connected with the 12V power supply, resistance R 1 the other end is connected with the C utmost point of transistor T 4 with resistance R 2 one ends, the parallel connection of diode D6 one end, resistance R 4 the other ends and resistance R 3 one ends, diode D7 one end is in parallel and be connected with the C utmost point of transistor T 5, and transistor T 2, transistor T 3 are connected with the C utmost point of transistor T 4, transistor T 5 respectively; Resistance R 2 the other ends are connected with capacitor C 2 one ends, capacitor C 2 the other ends are connected with the parallel connection of diode D5 one end and with the b utmost point of transistor T 5, resistance R 3 the other ends are connected with capacitor C 1 one ends, capacitor C 1 the other end and diode D4 one end are in parallel and is connected with the b utmost point of transistor T 4, and the other end parallel connection of diode D6, diode D7 also is connected with the C utmost point of transistor T 6; Resistance R 5 one ends are connected with the parallel connection of diode DZ one end and with the b utmost point of transistor T 6, and the other end of resistance R 5 is connected with transistor T 1.Its working procedure: during transistor T 1 conducting, by resistance R 5 signal is sent into the b utmost point of transistor T 6, transistor T 6 ends; The C utmost point of transistor T 4, transistor T 5 becomes high petential by turns according to the frequency of setting, and exports two square signals, makes transistor T 2, transistor T 3 conducting work in turn.Transistor T 1 by the time, by resistance R 5 signal is sent into the b utmost point of transistor T 6, transistor T 6 conductings, the C utmost point of transistor T 4, transistor T 5 converts low potential to, transistor T 2, transistor T 3 end, and quit work.
When external control signal during by spark coil 5 elementary energisings, transistor T1 conducting, after the transistor T1 conducting, adjust signal of circuit for the control of bootstrapping energizer, after this circuit is confirmed signal distinguishing, bootstrapping energization control is adjusted circuit according to predefined size in the elementary energy storage of spark coil, exports a certain frequency and two controlled square signals within a certain period of time, and oxide-semiconductor control transistors T2, T3 take turns conducting.Direct current with storage battery is transformed into the elementary Ac by transformer BN like this, and then be coupled to the secondary of transformer BN, after D1, D2 rectification, produced the negative DC voltage UO of the some volts that determine by the transformer BN primary and secondary number of turn at the O of secondary windings end.This electrical energy flows through D1 or D2, T1, storage battery, spark coil is elementary and form the loop.Know according to the Kirchhoff's law of determining voltage relationship in the power circuit, be added in the elementary terminal voltage UN=battery tension of spark coil+| Uo|; At this moment spark coil primary current
Because voltage rising i increases, elementary energy storage
Increase, promptly elementary energy storage increases.
The voltage U O that transformer BNO end produces can be according to the elementary parameter of different spark coils, people require the size of the elementary energy storage of spark coil, adjust the primary and secondary number of turn of transformer BN, can be met the elementary parameter of difference fire coil, require the required voltage U O of different elementary energy storage.
When the outside provided ignition control signal, transistor T 1 ended, and this signal is input to the control of bootstrapping energizer and adjusts circuit, through debate not Que Ren after, output signal is ended transistor T 2, transistor T 3, transformer BN quits work.After transistor T 1 ends, the elementary power circuit of spark coil is cut off, so produce the high voltage of adjustable amplitude at the C point, it is secondary to be coupled to spark coil together with elementary energy storage, produce 2.5 ten thousand volts of above high voltage, be added to gap location by little loss high voltage damper, the built-in inductance of spark plug, produce ignition spark point gas cylinder mixed gas.
After spark coil 5 primary circuits insert the bootstrapping energizer, under the big situation of spark coil 5 primary inductances, still can obtain bigger Peak current, according to
So when the elementary outage of spark coil, C names a person for a particular job and produces the high voltage of 1500V～3000V, this just provides possibility for the parameter point fire coil of employing new technology.
Because the C point voltage can be adjusted in 1500V～3000V scope, according to transformer principle, ignition wire circle time primary turns ratio can be in 10～30 scope adjustment.5 levels of spark coil are still exportable greater than 2.5 ten thousand volts of above ignition voltages like this.This turn ratio was never used till now from Cauer invention high-voltage ignition coil, and in other words, now ignition system uses the spark coil of this turn ratio, and secondary voltage can not disruptive spark plug gap and light a fire.
The primary and secondary parameter of spark coil when hanging down the turn ratio
R1＝0.4～0.7Ω L1＝0.008-0.015(H)
R2＝360Ω-1300Ω L2＝3-7.5(H)
The inferior primary turns of spark coil is than being 10-30
Adjust bootstrapping energizer O terminal voltage UO, make the i value at 7.0-9.0A, the elementary energy storage of spark coil is in the 300mJ-500mJ scope.Owing to used the bootstrapping energizer, after L1 increased, elementary i value still can reach requirement in finite time.After L1 increased, the i value was less when obtaining institute's energy requirement, and heat loss is little, but and economical with materials.R2 obviously diminishes, and reduces the energy loss of ignition circuit.L2 obviously diminishes, and secondary current increases, and is convenient to increase considerably the initial ignition spark energy.Figure 6 shows that the connection diagram of white act energizer and former ignition system.
The high voltage damper of EFI car use now, be diameter be have about 0.2mm the plain conductor of big specific resistance intensive, be wrapped in a diameter uniformly and be approximately 1mm, have on the non-metal rope of certain tensile strength softness, each circle that twines is non-contact, wrap the insulating material that satisfies usability at skin then, be cut into certain-length as required, promptly become high voltage damper with certain dielectric strength.Such high voltage damper is actually an air core inductor with certain inductance value and D.C. resistance, its effect exactly when the spark plug gap is breakdown, prevent the ignition circuit current-jump and produce electromagnetic radiation, influence vehicle computer or other equipment proper functioning.This high voltage damper D.C. resistance is bigger, more than 4.5K Ω, has increased the ignition energy loss of secondary ignition circuit in resistance in the two point loop.Therefore be necessary the high voltage damper of present use is transformed.
According to the physics and the principles of electric and electronic engineering, has the inductance element 11 that certain inductance value, skin are wrapped the outsourcing insulating material 14 that has certain dielectric strength and satisfy usability with two, couple together with resistance very little (about 0.2 Ω) and the high-voltage conducting wires 12 that is of convenient length, promptly form new high voltage damper, we claim that this high voltage damper is little loss high voltage damper.Section shape such as Fig. 8:
The inductance element parameter:
Inductance element be about 50mm, diameter is on the soft magnetic material of 4-5mm, be made around last some circles with the low-resistivity lead.D.C. resistance 2-5 Ω, inductance value 0.005-0.020H.
Little loss high voltage damper D.C. resistance has only about 10 Ω, in the two point loop, greatly reduce loss to ignition energy.Because the effect of inductance element, little loss high voltage damper still has good anti-electromagnetic-radiation ability.
The employed spark plug of EFI car all has the built-in D.C. resistance of 5K Ω-10K Ω now, purpose is to prevent that spark plug is in the effective clearance during breakdown generation electrical spark, generation is than the strong electromagnetic wave radiation, and disturb computer, vehicle mounted communication equipment, GPS navigation system and other electronic equipments, make its cisco unity malfunction.So in the former ignition system of EFI car, the built-in D.C. resistance of spark plug can't be taken away.Here analyze the anti-electromagnetic-radiation ability of spark plug built-in resistor in passing.The built-in D.C. resistance of spark plug is to a certain degree reducing the electromagenetic wave radiation interference.But behind the spark plug built-in resistor, the radiation of spark plug external electromagnetic is still open.Vehicle is constantly in service, the spark plug effective clearance is constantly become big by electric spark ablation, when the spark plug gap surpasses a certain value, still have stronger electromagnetic radiation and influence vehicle and normally move, this situation appears, the damage of spark plug is possible, but mainly is to be caused by the interference that electromagnetic radiation causes.As long as former spark plug is replaced with the spark plug of gap in effective coverage, symptom disappears at once.In other words, it is relative that built-in D.C. resistance reduces electromagnetic interference, with good conditionsi.Because the existence of the built-in D.C. resistance of spark plug, the secondary ignition energy that provides of ignition system has 40% above loss on built-in D.C. resistance.Along with the increase that requires the initial ignition spark energy, the spark coil secondary current increases, and in the loss of the built-in D.C. resistance of the spark plug increase that is directly proportional with current squaring, at this moment, loss is much larger than 40%.So the existence of the built-in D.C. resistance of spark plug makes the spark energy increase at place, spark plug gap quite difficult.
According to above analysis, take away the built-in D.C. resistance of spark plug, seek the new way of anti-electromagnetic-radiation, necessary.Referring to Fig. 7, according to electromagnetic principle, after the built-in D.C. resistance of spark plug taken away, again give spark plug built-in one on ferrormagnetic substance around the inductance of some circle high temperature wires 7, can solve the spark plug electromagnetic radiation to greatest extent, the anti-electromagnetic-radiation ability of more built-in like this D.C. resistance significantly increases, because the lead D.C. resistance of built-in inductance has only several Europe, so the ignition energy that 5 levels of spark coil provide is almost nil in the loss of built-in inductance, for increasing place, spark plug gap ignition spark energy, particularly the initial ignition spark energy provides technical assurance.This has also just created lossless, high anti-electromagnetic-radiation spark plug.
Measurement result:
Initial ignition spark energy 25.6mJ
Ignition spark energy 116.2mJ holds time
Total ignition energy 141.8mJ
From measurement result as can be seen, the novel point ignition system has increased the initial ignition spark energy of spark plug gap and the ignition spark energy of holding time really.Compare with existing ignition system, the initial ignition spark energy increases 8.5 times, and the ignition spark energy of holding time increases 4.53 times.
Claims (3)
1. novel automotive ignition system, comprise transistor ignitor control circuit (1), on transistor ignitor control circuit (1), be connected with the bootstrapping energizer, the bootstrapping energizer and the low turn ratio, low-loss spark coil (5) connects, the low turn ratio, low-loss spark coil (5) is connected with little loss high voltage damper (16), little loss high voltage damper (16) is connected with the spark plug (6) of built-in inductance, it is characterized in that: described bootstrapping energizer comprises control adjustment circuit (3), circuit (3) is adjusted in control has the primary air of centre-tapped transformer (4) to be connected with transistor T3 with primary and secondary by transistor T2, primary and secondary has the secondary winding and the diode D1 of centre-tapped transformer (4), diode D2 connects, diode D1, diode D2 is in parallel and be connected with transistor T, primary and secondary have centre-tapped transformer (4) secondary winding and with the low turn ratio, the elementary connection of low-loss spark coil (5), diode D3, moment suppresses diode DN and is connected in the secondary winding and the low turn ratio that primary and secondary has centre-tapped transformer (4) successively, between low-loss spark coil (5) elementary, moment suppresses diode DN and adjusts circuit (3) with control to be connected.
2. novel automotive ignition system according to claim 1 is characterized in that: the elementary resistance R of the low turn ratio, low-loss spark coil (5)
1The primary inductance L of=0.4～0.7 Ω, spark coil (5)
1The secondary resistance R of=0.008-0.015H, spark coil (5)
2The secondary inductance L of=360 Ω-1300 Ω, spark coil (5)
2=3-7.5H, the inferior primary turns of spark coil (5) is than being 10-30.
3. novel automotive ignition system according to claim 1 is characterized in that: little loss high voltage damper is made of the inductance element of two insulating material, and inductance element is connected by high voltage wire, and D.C. resistance is 2 Ω-5 Ω, and inductance value L is 0.005-0.020H.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101501172A CN101319645B (en) | 2008-06-24 | 2008-06-24 | Novel automotive ignition system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101501172A CN101319645B (en) | 2008-06-24 | 2008-06-24 | Novel automotive ignition system |
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| CN101319645A CN101319645A (en) | 2008-12-10 |
| CN101319645B true CN101319645B (en) | 2011-05-18 |
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| CN103225583A (en) * | 2013-05-03 | 2013-07-31 | 中国船舶重工集团公司第七�三研究所 | Ignition device for gas engine |
| JP6708189B2 (en) * | 2017-08-31 | 2020-06-10 | 株式会社デンソー | Ignition device |
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