CS196581B1 - Induction ignition coil - Google Patents

Description

The invention relates to a high efficiency induction ignition coil having significantly reduced parasitic variables. The coil makes it possible to substantially improve the ignition system parameters and control the output voltage and current flow. It is especially suitable for short-circuit transistor ignition.

The current ignition coils are usually realized by means of wide cylindrical coils, have a high number of thin wire windings and a large air gap. The coil has high resistance, large parasitic capacitances and stray inductances. As a result, the current flow is greatly oscillated and can only be influenced to a limited extent by additional circuits. At the same time, the effective value of the current and the increase in the force resistance loss increases. Large energy losses are compensated by increasing the inductance, resulting in an increase in the time constant. A large time constant limits the operation at high engine speeds and the number of cylinders connected to one ignition coil. The parasitic capacities do not allow the use of high gearing, they cause a small increase in voltage, sensitivity to z-water, and fluctuations in the inflammation point. In particular, courses, such as the repetition of sparks at short intervals, advantageous for igniting lean mixtures, can only be realized to a limited extent. Also, increasing the energy delivered to the spark gap is facing difficulties. For transistor ignition, short charging cannot be used. Normally, ignition coils also cause large energy losses in electronic ignition. On average, normal efficiency in normal operation is in the range of 1%. In thyristor ignition, the efficiency is partially increased at lower rpm, but this only results in lower power consumption from the battery. The energy transfer from the capacitor to the spark gap is highly lossy, resulting in reduced ignition capability. Different types of replacements with iron or ferrite cores of E, E, U, U, etc. They have cylindrical coils so that the parasitic capacities are only partially reduced.

The above-mentioned drawbacks are eliminated by an inductive igniter and a coil with a ferrite or iron core in the shape of U1, E1, cup-shaped or X core, with at least one post perpendicular to the magnetic coupling according to the invention. the high-voltage coil is located on the post at the clutch and above it is placed a voltage-coil. It is advantageous to use an U-shaped core, wherein the high voltage coils and the low voltage coils are evenly distributed on both posts.

An iron or ferrite core with a small air gap allows the desired inductance to be realized with fewer turns. Reduces the suction resistance, capacitance and dispersion inductance of the coils. The core

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U1 and even distribution of coils on both columns reduces parasitic quantities even more significantly. Cylindrical coils reduce parasitic capacities and ease insulation problems. Placing the coil to extend the air gap to the edge, with the high-voltage coil closer to the magnetic jumper and the low-voltage closer to the air gap, reduces the leakage inductance. The abbot at the core U1 and the uniformly spaced coils is more pronounced to reduce the scattering inductance. The I-shaped yoke, or a flat shape adapted to the core shape, encloses the magnetic circuit without undue strain. Reducing the parasitic variables substantially improves the energy efficiency, even if the flow current is highly volatile and thus increased the RMS current value. The coil itself causes considerably less current fluctuation, even during spark development. By means of additional circuits or controlled charging, the course of the current in the discharge can be influenced to a large extent to achieve better ignition effects. The increase in efficiency allows to reduce the inductance of the coil, thereby improving operation at high speeds, or increasing the number of cylinders connected to the ignition coil. With unchanged power and frequency requirements, the resistor connected in series with the low-voltage coil can increase and reduce current consumption. Serial resistance and inductance selection make it possible to largely control the amount of energy delivered to the spark, even in the direction of multiple magnification, without undue demand for increased battery current. Particularly significant results can be obtained using controlled transistor ignition, in particular

- in the case of short charging. Transistor ignition will significantly reduce parasitic capacities, rapidly increase voltage, reduce sensitivity to z-water, and volatilize the point of inflammation. The short charging time and the rapid increase in voltage allow repetition of sparks at short intervals, varying the ratio of capacitive and inductive components of the discharge, thereby improving ignition of lean mixtures. Reducing the parasitic capacities allows the use of an increased transmission and a higher ignition voltage. Improved power transfer also applies to thyristor ignition with water circuit adaptation.

The accompanying drawings show an embodiment of the induction coils according to the invention. In FIG. 1 is an embodiment having an E-shaped core. In FIG. 2 shows a uniform distribution of coils over the two core columns U1.

El-shaped core, resp. as shown in FIG. 1, the height of the column 1 is smaller than the length of the magnetic jumper 2. On the column 1, a narrow cylindrical high-voltage coil 5 and closer to the air gap 3 is located close to the magnetic jumper 7 and closer to the air gap 3 a narrow cylindrical low-voltage coil 6. normally narrower and lower than the high-voltage coil 5, especially when the coil resistance needs to be increased. Narrow cylindrical coils have a low inherent capacity. The parasitic capacity also decreases due to the reduction in the number of windings, which is achieved by the fact that, due to the relatively small air gaps 3, the magnetic circuit is of good quality and a smaller number of windings is sufficient for the required infusion. Placing the high-voltage coil 5 closer to the magnetic jumper 2 and the low-voltage coil 6 closer to the air gap 3 reduces the leakage inductance. The low-voltage coil 6 can even touch the yoke 4. The leakage inductance also reduces the shape of the magnetic circuit by the height of the pole 1 being less than the length of the magnetic jumper 2. The core U1 shown in FIG. 2 makes it possible to distribute the high-voltage coils 5a and the low-voltage coils 6 evenly over both columns 1. This reduces the middle thread length and reduces the resistance and capacity of the coils. Scattering inductance ’will also decrease.

The proposed inductively ignited coil can be used in a normal ignition system if the resistance of the low voltage coil is adapted to the operating conditions, or a resistor of the corresponding size is added in series. This resistance can be realized as variable e.g. using a transistor to accelerate the charging process.

The main purpose of the proposed coil is for electronic ignition, especially for short charging and intermittent charging process. Similar to the normal induction ignition coils, the capacitance ratios on the high-voltage side can be adjusted by additional metal strips. The use of a suitable cable distribution, or other modification of the discharge circuit, allows taring the current flow in the discharge while maintaining high efficiency.

Claims (2)

Ul and uniform distribution of coils to both piles, decreases parasitic quantities even more. Cylindrical cylinders reduce parasitic capacities and facilitate insulation problems. It is located at the edge of the air gap, whereby the high voltage coil is closer to the magnetic jumper and low voltage closer to the air gap, reducing the dispersion inductance. Again, there is a more pronounced reduction in the dispersion inductance at the core U1 and at the uniformly distributed coils. The I-shaped yoke, or flat-shaped shape, matched to the shape of the core closes the magnetic circuit without unnecessary overturning. Reducing parasitic factors significantly improves energy efficiency even if the current flow is considerable and thus the effective current value is increased. The coil itself causes considerable less current jitter, even during spark development. By additional circuits or controlled charging, the current in the discharge can be greatly influenced by the discharge and thus achieve a better ignition effect. Increasing the efficiency makes it possible to reduce the inductance of the coil, thereby improving the operation at high speed, or increasing the number of coils connected to the ignition coil. With unchanged energy and frequency requirements, the resistance connected in series to the low voltage coil can be increased and the current consumption reduced. Serial resistance and inductance selection can greatly control the amount of energy delivered to the spark, even in the direction of multiplication, without too much demand to increase the current draw from the battery. Particularly striking results can be achieved using controlled transistor ignition, especially - in case of shortened charging. In transistor ignition, the reduction in parasitic capacitance, the rapid increase in tension, the sensitivity to z-water, and the fluctuation of the wrist point are significantly applied. A short charging time and a rapid increase in tension make it possible to repeat sparks at short intervals, varying the ratio of capacitive to inductive component of the discharge, thereby improving the ignition of poor mixtures. Reducing the parasitic capacitances makes it possible to use an increased gear and achieve a higher ignition voltage. Improved power transmission also applies to thyristor ignition at water circuit adaptation. BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows a flange having an El-shaped core. Fig. 2 shows a uniform distribution of the coils, on both sides of the coil. El-shaped core, resp. the cup or X core has, as shown in FIG. 1, a height 1 of the smaller jumper of the magnetic jumper 2. The pin 1 is self-standing, or on the cube 7, a close-up of the magnetic jumper narrow cylindrical high-voltage coil 5 and closer to the air gap 3 of the narrow-gauge low-voltage Coil 6. The low voltage coil 6 can normally be narrower and lower and the low voltage coil 5, especially if it is necessary to increase the coil resistance. Narrow cylindrical coils have a small capacity. The parasitic capacity also decreases due to the reduction in the number of turns that is achieved by the fact that due to the relatively small air gaps 3, the magnetic circuit is of good quality and a smaller number of threads for the required influx is sufficient. Positioning the high voltage coil 5 closer to the magnetic jumper 2 and the low voltage coil 6 closer to the air gap 3 reduces the dispersion inductance. The low voltage coil 6 may touch the yoke 4. The dispersion inductance also reduces the magnetic circuit by height of the pole 1 being less than the magnetic jumper length 2. The core 2 shown in FIG. 2 makes it possible to distribute the high-voltage coils 5 and the low-voltage coils 6 evenly by stapling 1. This reduces the mean thread length and decreases the coil resistance and capacity. The scattering inductance is also reduced. The proposed inductively ignited coil may be used in a normal ignition system if the low voltage coil resistance conforms to the working conditions, or a corresponding size is included in the series. This resistor can be implemented as a variable eg by transistor to achieve acceleration of the charging process. In particular, the design of the proposed coil is for electronic ignition, particularly for shortened charging and intermittent charging process runs. Similar to the normal induction coils, additional metal strips can be used to adjust the capacitance ratios on the high-voltage side. The use of a suitable cable distribution system or other modification of the discharge circuit allows the current to flow through the discharge while maintaining high efficiency. SUBJECT OF THE INVENTION An inductive ignition coil with a ferrite or iron core, U1, E1, cup, or X having at least one collar perpendicular to the magnetic coupling, characterized in that the length of the coupling (2) is at most equal to the core (1) of the core, wherein the high voltage the coil (5) is placed on the column (1) by a coil (2) and the low voltage coil (6) is positioned above it. An inductive ignition coil according to claim 1, characterized in that the high-voltage coil (5) and the low-voltage coil (6) are evenly distributed on both pillars (1) on the U-shaped core.