UA51180A - Ignition coil for internal combustion engine (versions) - Google Patents

Abstract

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Description

Description of the invention

The invention relates to electrical equipment of internal combustion engines, in particular to devices of the ignition system 2.

The closest to the claimed invention is the design of the B-117A ignition coil, which includes a cylindrical body, inside of which there is a frame with a magnet wire, secondary and primary windings.

Insulation is placed between the windings. The windings have one high-voltage terminal and two low-voltage terminals, respectively, for the secondary and primary windings. In addition, the coil has a core, a cover and a spring of the central 70 terminal. The primary winding has 308 turns, the secondary - 21035 turns | see VAZ-2105 car, colorful album. M., 1984, p. 65).

The design of this coil is chosen as a prototype.

The prototype coincides with the claimed invention in the presence of common features: body; 19 frame; magnetic wire; primary winding; secondary winding; high-voltage terminal; low-voltage outputs of the primary and secondary windings.

But the known coil has a significant drawback, which is that the energy of the spark strongly depends on the mode of operation of the engine with a small or large load. Spark energy consists of two parts: "Capacitive" and "Inductive".

Eiskry U Es 5 E;

The energy of the capacitive phase « ve 2 where s is the capacity of the spark plug and is the breakdown voltage. Ha")

Energy of the inductive phase E; does not depend on the engine operating mode, but is determined only by the electrical parameters of the ignition system (commutator, high-voltage wires and ignition coil). co

The energy of the capacitive phase depends on the square of the breakdown voltage, which is directly proportional to the pressure in the cylinder. The pressure, in turn, depends on the operating mode of the engine: low or high load. The pressure in the cylinder and, accordingly, the breakdown voltage changes by almost 2 times, so Es changes by almost 4 times. --

Therefore, the excessive dependence of Eb on the engine operating mode determines the strong dependence of the spark energy on (3) the engine load, which makes the task of determining and maintaining the optimal ignition advance angle in internal combustion engine control systems very difficult.

The invention is based on the task of providing the ignition coil for internal combustion engines with an additional primary winding with a low-voltage terminal, providing the secondary winding with an additional high-voltage terminal, and also due to a certain number of turns of the primary and secondary windings and) with the selection of a certain wire cross-section, to ensure reducing the dependence of the spark energy on the engine operating mode. and The set task is solved by a group of inventions that are connected by a single inventive idea. According to the first variant of the group of inventions, the problem is solved in the ignition coil for an internal combustion engine, which is a transformer containing a housing, inside which is a frame with a magnet wire, secondary and primary windings, which have a high-voltage terminal and two low-voltage 4! outputs according to the secondary and primary windings, the fact that the secondary winding contains 150 - 3000 turns of wire - which has a cross section of 0.11 - 0.55 mm, and the primary winding has 7 - 40 turns of wire, which has a cross section of 0.85 - 2.5 mm2.

In the second version of the group of inventions, the problem is solved in the ignition coil for an internal combustion engine, which is a transformer containing a housing, inside of which is a frame 20 with a magnet wire, secondary and primary windings, which have a high-voltage terminal and two low-voltage terminals according to of the secondary and primary windings in that the secondary winding contains 150 - 3000 turns of wire with a cross section of 0.11 - 0.5Bmm, and the primary winding has 7 - 40 turns of wire with a cross section of 0.85 - 2.Bmm , while the secondary winding additionally contains a high-voltage terminal.

In the third version of the group of inventions, the problem is solved in the ignition coil for the internal combustion engine 99, which is a transformer containing a housing, inside which a frame is placed. with a magnetic circuit, secondary and primary windings, which have a high-voltage terminal and two low-voltage outputs, respectively, for the secondary and primary windings, in that the secondary winding contains 150 - 2000 turns of wire with a cross section of 0.11 - 0.55 mm2, and the primary winding has 7 - 40 turns of wire with a cross section of 0.85 - 2.5 mm2, because the coil additionally contains a second primary winding, which contains 7 - 40 turns of wire with a cross section of 0.85 - 2.5 mm, in addition, the second primary winding is provided the third low-voltage terminal.

In the fourth version of the group of inventions, the problem is solved in the ignition coil for an internal combustion engine, which is a transformer containing a housing, inside of which there is a frame with a magnet wire, secondary and primary windings, which have a high-voltage terminal and two low-voltage 65 terminals according to the secondary and of the primary winding in that the secondary winding contains 150 - 2000 turns of wire with a cross section of 0.11 - 0.55 mm?, and the primary winding contains 7 - 40 turns of wire with a cross section of

0.85 - 2.Bmm, in addition, the second primary winding is provided with a third low-voltage terminal, and the secondary winding contains an additional high-voltage terminal.

New in the first variant of the group of inventions is the number of turns of the wire of the secondary and primary windings, as well as the cross-section of the wire of the secondary and primary windings.

New in the second variant of the group of inventions is the presence of an additional high-voltage terminal in the secondary winding.

What is new in the third variant of the group of inventions is that the secondary winding contains a smaller number of wire turns, in addition, the coil additionally contains a second primary winding, which is provided with a third low-voltage terminal.

What is new in the fourth variant of the group of inventions is that the secondary winding is equipped with an additional 70 high-voltage terminal.

Thanks to the selected parameters of the ignition coil (small number of turns of the secondary winding, large diameter of the wire), the output resistance of the secondary winding is approximately 50 times less than that of the prototype coil and practically does not affect the current value of the "Inductive" phase. The current of the inductive phase and its duration are determined by the difference between the accumulated energy of the primary winding. in: with MM per I; it is the energy of the "capacitive" phase

MIS - p. 20, Provided that a wire without resistance and spark plugs without a built-in resistor are used, the current of the inductive" phase is practically determined only by the ohmic resistance of the spark. Therefore, when the energy of the "capacitive" phase decreases in the mode of minimum engine load, the energy of the "inductive phase" increases accordingly. The current of the "inductive" phase of the proposed ignition coil in the low-load mode exceeds the current of the prototype ignition coil by up to 20 times. Therefore, the spark energy practically does not depend on the engine operating mode. This greatly simplifies the task of determining and maintaining the optimal ignition advance angle of the internal combustion engine. "

The proposed coil is shown in the drawing. Fig. 1 - sectional view of the coil, the first version; Fig. 2 - sectional view of the coil, the second option; o Fig. 3 - a view of the coil in section, the third option; Fig. 4 is a sectional view of the coil, the fourth option. (uh)

The ignition coil for the internal combustion engine according to variant 1 (Fig. 1) contains a housing 1, inside which is placed a sectioned frame 2, on which the secondary winding C is wound in such a way that the end of the winding of one section is connected to the beginning of the winding of the following section. The secondary winding C contains 400 turns of copper wire with a cross section of 0.25 mm 2. On top of the secondary winding C, the primary winding 4 is wound, which contains 12 turns of wire with a cross section of 1.2 mm 2. Between the secondary winding C and the primary winding 4, an insulating layer 5 is placed. The sectioned frame 2 surrounds the magnetic conductor b, in which there is a gap 7. The secondary winding C has a high-voltage terminal 8. The primary winding 4 has the first low-voltage terminal 9 and the second low-voltage terminal 10, which is connected to the beginning of the secondary winding 3 The primary winding 4 also has an insulating layer 11. The ignition coil according to option 2 (Fig. 2) differs from the coil according to option 1 in that it has an additional high-voltage terminal 12, which is connected to the beginning of the secondary winding 3. » The ignition coil according to option C (Fig. 3) differs from option 1 in that it has a second primary winding 13 and a third low-voltage terminal 14. The second primary winding 13 contains 20 turns of a wire with a cross section of 1.1 mm2, it is wound on top of Erwin winding 4 on the insulating layer 15. The beginning of the second primary 1 winding 13 is connected to the first low-voltage terminal 9, and its end is connected to the third low-voltage terminal 14. The winding direction of the second primary winding 13 is opposite to the winding direction of the first primary winding 4. - The ignition coil according to option 4 (Fig. 4) differs from option C in that it has an additional co 50 high-voltage terminal 12, which is connected to the beginning of the secondary winding 3.

The ignition coil for the internal combustion engine according to option 1 works as follows. An electric current is supplied to the first 2 low-voltage terminal 9 and the second low-voltage terminal 10, which, passing through the primary winding 4, forms a magnetic field, the flow of which is closed through the magnetic conductor 6. The gap 7 in the magnetic conductor b reduces the residual magnetization by unipolar current pulses that flow in the primary winding 4 At the moment of turning off the current in the primary winding 4, a self-induction current flows out, which creates a high voltage ("25kV") in the secondary winding Z, which through the high-voltage terminal 8 of the secondary winding Z

P pierces the air gap of the spark plug (not shown in the drawing).

The operation of the ignition coil for the internal combustion engine according to option 2 differs from the operation of the coil according to option 1 in that, due to the fact that, due to the fact that another 60 spark plug is additionally connected to it to the high-voltage terminal 12 (not rotated in Fig. 2), a spark is simultaneously formed in two spark plugs.

The operation of the ignition coil for the internal combustion engine according to option C differs from the operation of the coil according to option 1 in that, after a breakdown, a current is supplied to the second primary winding 13 through low-voltage terminals 9 and 14, which supports the current of the secondary winding C and, accordingly, the current of the "inductive" spark phase.

The magnitude of the current of the secondary winding Z reaches 5A, and its duration is determined by the duration of the current of the second 65 primary winding 13.

The operation of the ignition coil according to option 4 differs from the operation of the ignition coil according to option However,

that as a result of connecting to it one more candle (not shown in Fig. 4) with the help of high-voltage terminal 12, a spark is formed simultaneously in two candles.

The current of the "inductive" phase is determined by the formula:

And -

TPazhoe t

For the coil described in the Igpah prototype. » 100MA w- 0,Zms.

For coils according to option 1 and option 2:

Sh Mvloif. Sh 100 100, od 0 tah tvo, MVP. Volume A OLom--4bom 50 where: M v.o.i.f. - the voltage of the secondary winding of the "inductive" phase, h v.o. - resistance of the secondary winding, g V.P. - resistance of the high-voltage wire, g i.p. - spark gap resistance.

For ignition coils according to option C and option 4) v.o.i.f. I am 2508, therefore, ----5A5 so 50

The above calculations show that the current of the "inductive" phase in the claimed ignition coils is much higher than that of the known ignition coil.

Claims (4)

The formula of the invention 1. An ignition coil for an internal combustion engine, containing a housing, inside which is placed a frame with a magnet wire, secondary and primary windings, which have a high-voltage terminal and two low-voltage terminals, respectively, for the secondary and primary windings, which is characterized by the fact that the secondary "winding contains 15043000 turns of wire that has a cross section of 0.1140.55 mm and the primary winding has 7-40 turns of wire that has a cross section of 0.8522.5 mm. 2. An ignition coil for an internal combustion engine, containing a housing, inside which is placed (av) a frame with a magnet wire, secondary and primary windings, which have a high-voltage terminal and two low-voltage terminals, respectively, of the secondary and primary windings, which is distinguished by the fact that the secondary the winding contains 15043000 turns of wire which has a cross-section of 0.11240.55 mm2 and the primary winding has 7740 turns of 7 wire which has a cross-section of 0.8522.5 mm, while the secondary winding additionally contains a high-voltage terminal. "- 3. An ignition coil for an internal combustion engine, containing a housing, inside which is placed a frame with a magnet wire, secondary and primary windings, which have a high-voltage terminal and two low-voltage terminals, respectively, for the secondary and primary windings, which is characterized by the fact that the secondary winding contains 15042000 of turns of wire, which has a cross section of 0.11 7 0.55 mm, and the primary winding has 7-40 turns of wire, which has a cross section of 0.85242.5 mm, while the coil additionally contains a second primary winding, which « 20 contains 77 40 of turns of wire, which has a cross-section of 0.85.2.5 mm, in addition, the second primary winding is provided - with a third low-voltage terminal. 4. An ignition coil for an internal combustion engine containing a housing inside which is placed. . . . . and a frame with a magnetic circuit, secondary and primary windings, which have a high-voltage terminal and two low-voltage terminals, respectively, for the secondary and primary windings, which differs in that the secondary winding contains 150 2000 turns of wire, which has a cross-section of 0.1120.55 mm, and the primary the winding contains 72:40 s turns of wire, which has a cross-section of 0.85 2. 2.5 mm, in addition, the second primary winding is provided with a third -3 low-voltage terminal, and the secondary winding contains an additional high-voltage terminal. - (ee) "2 because b5