JPS59150979A - Capacity discharge ignition device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved capacitive discharge ignition system for an internal combustion engine.

The present invention is an improvement on the capacitive discharge igniter disclosed in U.S. Pat. No. 3,800,771. This patent shows a capacitive discharge ignition system that stores energy in both the capacitor and inductor at the same time when energy is drawn from the vehicle's battery. By using two types of energy storage, capacitive and inductive, the amount of usable energy relative to the total energy increases compared to conventional methods that use only one of them for energy storage. The efficiency of the ignition system is higher than K.

The ignition device related to the above patent is a point actuation type (a p
oints operated 5yste+n). However, over the past few years, magnetic breakerless (contactless) distributors have largely replaced point-type distributors in automobiles.

During this time, it has become important to produce @t1 as efficiently as possible for automobiles.

The watering invention has two aspects. The first objective is to expand the scope of application of the ignition device using this simultaneous energy to the electric current distributor, and to do this using a unique method. next.

U.S. Pat. No. 38 to improve efficiency TD and gutter operation.
There are several circuit changes to the ignition system of No. 00771. Improvements in this circuit can be applied to both breakerless resistor repeaters and point type systems.

The object of the present invention is to provide a capacitive discharge ignition device that simultaneously stores and utilizes energy and V'' using a condenser/stooth inductor, which can be used in conjunction with a breakerless type magnetic system distributor. Another object is to improve the efficiency and reduce the cost of manufacturing the capacitive discharge igniter of US Pat. No. 3,800,771.

Still another object of the present invention is to obtain the U.S. Patent No. 3,800,771
The purpose of this invention is to improve the false triggering characteristics of the SCR of the circuit in issue.

Another object of the invention is that the current drain is low, but the ignition/on switch is placed in the accessory position (one of the switching positions of a conventional ignition/on switch, usually marked ``accessory'', where the ignition/on switch is It is an object of the present invention to provide a capacitive discharge ignition device which does not require the installation of a motor vehicle accessory (such as a radio, etc.) when switched to this position, in which power is supplied to the accessories of the motor vehicle (such as a radio, etc.).

Yet another object of the invention is to provide relatively high output voltages, long stroke times and low dwells at engine starts and low speeds, and relatively low output voltages, short strokes at high engine speeds. It is an object of the present invention to provide a capacitive discharge ignition system that provides automatic fishing with low e-return times and high dwell times.

The invention can be understood by referring to FIG. 1, which shows a one-shot embodiment.

ql, Figure 2 shows an ideal variable UE that can be used in the circuit of the present invention.
Show the container.

In order to fully understand the circuit disclosed in U.S. Pat.

The 1'f Fr clear skin is incorporated herein by F; and 1. Ru.

As mentioned above, the improved f'ils of the circuit of the present invention (gt7
t+: secondary side of the device) is breakerless and 71? It can be applied to both Indian types. In both cases, the transformer T
-1's primary circuit periodically closes IJ11 to increase or decrease the current in the primary winding, and by kneading, electrons of opposite polarity are transferred to the secondary winding.
jl+' Planted. Stun power (S tancor)
It is suitable for commercially available variable ratio R%fJ'-T-1's with equal splits and secondary windings, such as P-6375, but to ensure optimum operation, 1ll of
i lj Metamorphosis can be used.

Capacitor C-3 is a discharge capacitor.

When the SCR becomes conductive, a discharge occurs through the SCR and the ignition coil. Power transistor Q- by resistor
During the period when transistor Q-3 is turned on (conducting state), the energy stored inductively in transformer T-1 by the current from the battery is transferred to transistor Q-3, which is turned off (non-conducting state). The voltage is transferred from the secondary winding of the time transformer to the storage capacitor C-1. This energy is transferred from storage capacitor C-1 to discharge capacitor C-3 when the primary circuit of transformer T-1 is closed again by turning off transistor Q-3.
is transferred from the battery to the discharge capacitor C-3,
It is added to the capacitive energy. Thus, since two energy sources are used to charge the discharge capacitor C-3, the charging burden is 11) from the transformer to the storage capacitor C-1 while the primary circuit of the transformer IE is open; Inductive energy transferred to.

or (2) by closing the primary circuit of the transformer.

'The capacitive energy source provided by the battery is at a higher level than if only one of the sources was transferred to the discharge condenser/cell C-3. Since both inductive and capacitive energy sources are used, the transistor Q remains open while energy is being drawn from the battery.
-3 is on (when the primary circuit of the transformer is closed), there are two times instead of one time when the energy transfer to the discharge capacitor is at its maximum.

When the primary g) j path opens, 71, which has a polarity such that the lower side of the transformer in this figure is positive with respect to the upper side, also becomes 15 and 2.
Induced to the next winding. This secondary voltage is the storage capacitor/C
Increase energy by -1. C-1 average F&,
IF, . When the primary circuit is closed, an electric current E having a polarity such that the upper side of the secondary winding is positive with respect to the lower side in the figure is induced into the secondary winding. This l'(I
E is storage capacitor C-1'ilT; with earth) Jk
In addition to the city 5 capacitor C-3, 1 yen is photoelectrically charged.

Due to the improvements that the lt'jl path of the present invention has.

Therefore, the capacitance I- of the storage capacitor C-1 is 1ν1;
Compared to the first one used in No. 71, it is considered to be a dog. Kneading has the effect of increasing the 411 efficiency*, lowering the operating voltage, and reducing the cost of the circuit. C-177
) The maximum capacity value is determined within a range where the number of on-off cycles of Q-3 required to reach the average charging potential of C71 is not excessively large and the initial cracking/king time of the engine is not excessively long. 1. Ru. It has been found that a 16 .mu.F capacitor does not increase charging time excessively when the other component values listed at the end of this specification are also utilized. In addition to the benefits mentioned above, this larger K, tdi't capacitor results in less continuous spark voltage variation 1111 than would occur with a smaller capacitor, even though optimal dwell is not maintained.

The discharge capacitor C-3 is thus charged, and soon after the primary circuit is opened again, the gate-to-emitter junction of the SCR becomes ζ-earth, the SCR becomes on/off, and the charge on C-3 becomes 8CR. and discharge through the ignition coil, thereby igniting the spark plug.

) F, and other improvements in the inventive circuit provide that the resistance generated by the inventive circuit (U.S. Pat. No. 3,800,771)
-1) is omitted, which minimizes the power required to trigger the SCR and makes operation more efficient.

■As shown in 1, the trigger path is 8 in the convex J path of the present invention.
The sheath trigger path is very small and therefore has an inexpensive capacitor (0,005 μF) across it to minimize the energy required to generate the trigger signal. A large (100K) resistor R-4 is used for this trigger.
It is used to reduce the rate of change in the electric current of the trigger capacitor C-2. Capacitor C-2 is connected through resistor R-4 until it reaches a potential greater than capacitor c-1 after the SCR triggers. When this capacitor C-2 is photoelectronized through R-4, CR-3 is reversed and S
Becomes Ias. Diode crt-B is con 7' 79
Due to the voltage that is always present in C-1, the voltage is constantly increasing
Therefore, when the transistor Q-3 is cut off, that is, the performance of false triggering of the SCR at times other than the trigger moment is significantly reduced.

However, if you want to set the trigger sensitivity to %C-
2 and CR-8 offshore 11i'g may be replaced with @.

As mentioned above, when the SCR is triggered, the number range condition
SC-3's skin is exposed through stiffness. Another improvement of the circuit of the invention is that the co/capacitor C-,3 is connected between the anode (actually through the ignition coil) and the gate of the SCR rather than between the anode and cathode. Historically, one side of the converter/default C-3 is connected directly to one side of the converter/default C-1. These modifications improve the ignition stability of the SCH and prevent its monopolization due to transient phenomena occurring during charging of the condenser C-3. SCR
Since the gate of can pass only a small portion of the induced current (/'C), diode CR-5 is utilized to provide a return path for most of the current flowing through the cathode.

Furthermore, C-4, R-5% R-6 and CR-10 are SC
This prevents multiple ignitions of R, that is, ignition of SCH is repeated and the ignition delay becomes extremely long. Knead is 11
This is advantageous when racing (competition) or when the snow ξ-kushilag gap is particularly wide. This circuit not only reduces the spark time for one firing of the SCR, but also returns the used fuel to a single heavy condenser, and when the This energy kI is used to give the special high output ff;i, E that is essential for the rallying of the race.

When CR-7 is blocked F'li, a sudden positive rise occurs at the anode of SCR, and this I is circuit C-4, It-
5゜If you don't have R-6 and CR-10, will there be a gap or a long snow? −
It acts to cause the ladle to ignite over a period of time. CR'-1 (+ is the rising Q '7 of this +E
King Cheng? , (CR-5 with 1ifi on the cathode of SCR)
To prevent re-ignition, turn the gate joints in reverse order.

Create a rampart for R-5 and C-4. Biliary triglyceramata. 1E frost on the anode of 5CJt; gate-cathode junction is always reversed when pressure is applied.
θ・k is reduced by J in order to , the charge on C-3 is 1~
Sa, h, -C is +1, (this 1100 CR-9 power is available)
The same is true when false triggering from the SCR anode is likely to occur with 4Fe.

Not for racing, but for normal car driving.

Long stroke times are desirable, therefore C-4, R-5
, R-6, and 0R-10 may be omitted.

If an intermediate spark time is desired, use this circuit and increase the resistance of R-5. R-5
Slightly increasing the value of will result in lower RPM (ID1 per minute)
If the rotation speed is increased, the time at high RPM increases.

As mentioned above, a further object of the present invention is to provide an 8-liter and a point-type container that utilizes simultaneous energy transfer for induction (breakerless ignition devices that have become widely used in recent years). (i.e. non-contact type) nostributor, as is well known to those skilled in the art.

A basic breakerless resistor repeater consists of a rotating member, such as a rotating armature or reluctor, with a plurality of peripherally projecting spokes that pass past a permanent magnet that moves statically during rotation. It has become.

As each spoke approaches the magnet, a voltage pulse of the opposite polarity is induced from the pick-up coil III to the detection coil 1, and when the spoke moves away from the magnet, a voltage pulse of opposite polarity is applied to the pick-up coil III. IE/ξrus occurs. Thus, one of the armatures H' approaches the permanent magnet and escapes n11. -The pulse waveform not shown on the left side of the figure is generated. If the rotational speed of the armature were to fall and the peak-to-peak voltage of this waveform would increase i2, the width would be reduced by 1 no.
The slope of the leading and trailing edges becomes gentler. On the other hand, when the rotation speed increases, the peak-to-peak electrical ratio increases by J', 7, and the peak of the breakerless resistor repeater becomes narrower and the rise becomes steeper at 6°-6j, 5. The city's 1 field is 2 at the start.
20 to 40 at low engine speeds
It's a bolt.

Nori Nioh in the picture? 1st time of deafness! Looking at the details, is the purpose of this transistor circuit the output of the resistor computer? The first thing to do is to turn on and off the primary winding by placing one note on the luth. When the transistors 1 and 1 turn on for iE t'tlf of each ξ rus, the battery XMi passes through this primary winding and the power transistor Q-3 to Positive,
- At the end of Qsis1■- minutes, the transistor is turned off and the current is cut off. The magnitude of the primary winding current at this time is determined by the time during which these transistors are turned on. The negative part of this nozzle of diodes DCR-1, CR-2, and CR-3 is connected to the pace of transistor Q-1.
This is to prevent damage to the emitter junction. Additionally, the diodes prevent the spigot transistors from triggering until the first predetermined minimum amplitude of this pulse is reached. In the illustrated example, this amplitude is chosen to be 2.4 volts and the stiff diodes are chosen to each have a forward voltage drop of 0.6 volts.

Additionally, these transistors are chosen to have a pace emitter forward 1 (IE drop) of 0.6 volts so that they will not conduct until the input waveform exceeds 2.4 volts. If you want to increase the supply current from the battery, use a diode CR.
-3y may be omitted, but such a change would increase the sensitivity of the bird and increase the output energy somewhat.

By blocking the low amplitude portions of the signals from these transistors, these transistors saturate faster and become stiffer due to fidgeting.
The D loss is small, and the variable FE converter T is reduced at low engine speeds.
Almost simultaneously with the cell phase of the primary side of -1, transistor Q-3 is turned off. If the transistor Q-3 is conductive to the primary side of the transformer +5>H Sha T-1, the 711 power disrupmination due to the heating of the σ monthly winding in the transformer will burn out.
Mainly due to the sieve current heating of the transistor Q-3, the efficiency of one operation becomes fF.

This Jl is also about 2.4 volts σ) due to the fast electrical acceleration of the input waveform.

Burning is particularly important when the amplitude of the input waveform becomes steep (7' rise). With the three diodes, the conduction time of transistor Q-3 at very low RPM is reduced to about 5m5 (about 15% of the time): cylinder engine R
In PM, about 50% of the time it will be sent to you and it will be 5 to 5. The conduction time of transistor Q-3 is therefore automatically adjusted to produce a uniform output voltage.
In other words, during starting and idling, which require a high power output, the maximum power output decreases as the engine speed increases as the snow ξ-requirement becomes smaller. Relatively low dwell for desired low RPM and high dwell for desired VC
Brings deep RPM. The output 'sleep' is always maintained above a sufficient level, so less current than the normal current is drawn from the battery.

The circuit is further configured such that a voltage of a second predetermined amplitude, which is significantly lower than the first predetermined tM117Pl, turns on transistor Q-3 during start/start. In this example, this second predetermined value is 2.4
I chose sail 6 bolt instead of bolt. Part of the switching device i'' resistor R-1 and diode C) are connected to the battery voltage through the start switch so that the battery voltage is applied only at the start. It is difficult to increase the input sensitivity to the desired value.
It is effective. This is important in cold regions or under low-battery electronic conditions. However, if the resistor maintains a sufficiently large trigger voltage at start-up, the magnitude of the output signal will be low (as occurs in the above case). - If the trigger voltage is not set on the 5 or gives sufficient trigger voltage IE at the start → 1. If it is small, there is no need to extend the battery voltage, so resistor R-1 and diode CR, -4 may be omitted.

Resistor R-3 is the reliable 1a of transistors Q-2 and Q-3.
Corrected ifi, or anti-R-2 caused ]b damage.
Vj ') 7', CFi style reluctance, SCR equipped with a switch, > -Fll transistor Q-1
, Q-2, and Q-3 may ignite prematurely in the lead-in phase, but the pace of transistors Q-2 and Q-3 may be ignited prematurely in the leading phase of transistors Q-2 and Q-3. - Avoid entering the emitter junction.

As mentioned above, this discharge t=n case is a discharge capacitor C-
When 3 is changed to 1 weapon, SCR will re-trigger itself several times. High voltage now re-trigger and long ξ
- Occurs at low engine speeds where a wide margin is required.

Furthermore, the ignition system is capable of producing extremely high amplitude sparks even with a nearly dead battery.

This is because the stored energy can be increased to the extent that even a weak battery due to a very low battery voltage is sufficient. Some of the sparks may not be effective, but if the remaining sparks can spin the engine up to a light-speed enough to start the generator.

(If there is a way to get Ennon to rotate first) then the engine can be started.

A further advantage of the circuit of the invention is that when the engine is not running, the current is reduced by the transistor leakage current (typically 50
This means that it does not flow at all, except for the water (about μ8). This low on position IK flow makes the omission of the accessory position normally found in ignition switches a T'fr pass. Additionally, the short turn-on period of transistor Q-3 even at low engine speeds eliminates the no-last resistor required for point actuation, which has the effect of increasing efficiency.

Give the circuit constants for the example VC shown below.

The constants of Kokan et al. are typical, but first of all, 1
;It is not subject to R.

R-1...1500Ω R-2...56Ω R-3...1000Ω n-4...l (l OKΩ R-5・l 00 (lΩ R-6...I(1,000Ω C-1...16 fi F, 450 WVI)C
C-2...0-005μF C-3...]/lF, 600WVDCC-4...
('), 005μF C11,-1-CR-1(,1.../recon diode'r-t-x stancor P-6375Q
! ... Preferably ECG-128 or 2N3053
, or 2N3300 Q-2...ECG-] 29 or 2N4037 or 2N4036 or 2N5323 (Uf suitable) Q-3.
...TIP34A, B or C3CR-1...T]6
-1] A summary of the performance obtained with the 6E or T16-116M method zero ignition system is as follows.

1. Even if the ignition is left on, the current drain in the electrical system when the engine is not running is actually zero.

A 21-cylinder 4-stroke engine runs at 360 ORPM, and more than 400 volts are applied to the primary side of the snow coil.
From a -1, 1,2 volt supply, only one (1) amp of dray/volts can provide enough energy to provide 0.5 mS of dray.1. Ru.

3. When the supply current from the 12-port power source is 1 ampere μ, an output of 500-600 volts, 11 □, and S width can be easily obtained with an 8-cylinder engine at I RPM.

The supply current is approximately 400 volts under 4 amperes μ.
The output voltage of the 1718 is nJ at 1000 ORPM.

4. All of the above parameters indicate that sufficient energy can be provided while reducing the current from the 12-port power supply.

Since all of this energy comes from the combustion of fuel, the extensive use of igniters such as the one described above results in significant savings in fuel, which is now becoming increasingly scarce in supply.

5. Do not clean or clean the spark plug gap between spark plugs at least 5 times longer and 7.C.
Then, reduce the output,) ignition "r% BY", 1
It becomes 0 times or more.

For the strange ITE shout T-1, the position of the tap of the secondary winding sound spring is set so that the winding +L-++ is one-third to one-fourth of the winding of all the secondary windings (inspection σ). Further improvement is achieved by determining the curve of the lower half of the secondary winding: 1.11:
The resistance should be approximately 5Ω and 1. One iXμ of the secondary Ge knee should be +X71 (IQΩ).

The primary should be about 4 millihenries with a 1/4 ohm DC resistance on the part.

The Jiff core should be fused to ^11, which will be a primary current of 10 amperes, and it will take 1 hour.

The turns ratio should be approximately 1-32.

Modifiers such as the above offer the following advantages over the Stanker P6375:

Both operating efficiency and output are high in the speed range of 1.5 mS.

2. The peaks and pressure peaks when the tiger/rasters Q-1, Q-2, and Q-3 are turned off are small.

3 C-3 is discharging energy to the snow ξ-coil 1; Reverse of charging diode CR-9 in 11) ζ is i12<, the energy of C-3 does not return to C-1.

4. The trigger voltage for the SCR is large, improving the starting power in cold regions or low speed cranking.

4. Figure 1 is a circuit diagram of an embodiment of the water bucket 1, Figure 2 is a diagram showing a suitable pressure regulator for use in the circuit of Figure 1.

T-]...] transformer L-E, Ql, Q2. Q3...Transistor, 5CR-1...Crystalline control rectifier, C
RI~CRI O...Diode, C-1...Top;
i￥ [conde/su.

Claims (1)

[Claims] 1. A resistor, a step-up transformer having a primary winding and a secondary winding, and a primary circuit including the primary winding, a battery, and a switch means. a discharge capacitor, a series circuit of a silicon-controlled rectifier and an ignition coil connected in parallel to the discharge capacitor and to the secondary winding of the transformer, when the primary circuit is closed;
means for charging the discharge capacitor by applying a voltage induced in the secondary winding of the transformer to the discharge capacitor;
means for discharging the discharge capacitor through the silicon controlled rectifier and the ignition coil to produce an ignition spark when the primary circuit is opened; and a storage for assisting the transformer in charging the discharge capacitor; In a capacitive discharge igniter comprising a capacitor and means for charging the storage capacitor when the primary circuit is open, the resistor repeater includes a rotating member and a positive and a negative polarity, respectively, as the rotating member rotates. and a detection coil for inducing a voltage voltage having a section. The resistor repeater is connected to the primary circuit via the switch means, and the switch means is controlled by the induced voltage noise ξ to close or open the primary circuit to supply current to the primary circuit. The switching means has a first transistor (Ql), the base of which is connected to the detection coil of the resistor, which causes the voltage to flow and cut off when the voltage is in the positive part. Close the primary circuit and from the above
allowing intercurrent to flow into the primary winding of the transformer, the trigger path of the first transistor (Ql) being at least directly connected to the heath-emitter circuit of the first transistor (Ql); first diode (CR-1)
The first diode (CR-1) has a forward electron drop of a first predetermined amplitude level, and the portion E of the electrician has a first predetermined amplitude level of 4. When the amplitude level becomes higher than the first predetermined amplitude level, the first transistor (Ql) becomes conductive, and when the positive part of the amplitude level becomes lower than the first predetermined amplitude level. - A capacitive discharge ignition device, characterized in that the transistor (Ql) according to description 1 becomes non-conductive, and the diode i41 prevents the negative part of the electronic pulse ξ from being applied to the transistor NKx. 2. In the capacitive discharge ignition device according to claim 1, the switching means further includes second and third transistors (Q2, Q3), and the collector of the first transistor (Ql) is connected to a resistor ( R-2) through the second
The emitter of the second transistor (Q2) is connected to the pace of the third transistor (Q3), and the emitter of the third transistor (Q3) is connected to the pace of the third transistor (Q3). The first transistor (Ql) connected to one side of the primary winding of the transformer
and the emitter of the second and third transistors (Q2
．． A capacitive discharge ignition device characterized in that the collectors of Q3) are commonly connected and the third transistor is a power transistor. 3. In the capacitive discharge ignition device according to claim 21, the pace of the second transistor (Q2) is connected to the third transistor (Q3) through a resistor (R-3).
A capacitive discharge ignition device characterized in that it is connected to an emitter of. 4.Special W1: In the capacitive discharge ignition device according to any one of claims 1 to 3, the switch means connects the emitter and collector of the transistor that are commonly connected only during engine starting. The means (R-1, CR-4) for connecting at least a part of the output voltage of the battery are
A capacitive discharge ignition device characterized by: 5. Capacitive discharge ignition system RFT according to claim 4
, the means for connecting at least a part of the output voltage of the battery to the emitter and collector of the transistor includes connecting the emitter and I of the first transistor (Ql) to the emitter and collector of the transistor;
:The second and third transistors (Q2, Q3
) A discharge-resistant ignition device characterized in that it includes a starter diode (CR-4) connected via a starter switch between the common junction light point of the collector of the battery and the battery. 6. In the capacitive discharge ignition device according to any one of the first to fifth peaks of the scope of the R/Wr restriction, a heavy load induced by J is applied to the secondary winding of the transformer. The means includes a trigger means for triggering the silicon controlled rectifier (5CR-1), and the trigger means includes a capacitance between the secondary winding and the gate-cathode junction σ) of the silicon controlled rectifier. +t
7. A capacitive discharge ignition device according to any one of claims 1 to 6, characterized in that the discharge capacitor (C
3) A capacitive discharge ignition device, characterized in that it is effectively connected between the anode and gate of the silicon controlled rectifier (SCR-1).