JPS58180765A - Igniter for internal combustion engine - 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 is an ignition device for an internal combustion engine, which includes an electromagnetic generator for generating ignition energy, and a magnetic pole wheel of the electromagnetic generator driven by the internal combustion engine. With circumferentially distributed magnetic poles of alternating polarity, these magnetic poles cooperate with a stationary inductor to generate an inductive control pulse that controls the electronic ignition switch at the point of ignition. The control pulse generator consists of a stationary control pulse generating coil having an iron core, and the ends of the control pulse generating coil are fixed as magnetic pole legs to the magnetic pole wheel of the control magnet system. relating to a type adapted to cooperate with a rotated part. In known ignition devices of this type, an electromagnetic generator for generating ignition energy has a magnet system arranged circumferentially of a pole wheel.

A separate magnet system with a control magnet is arranged in the area of the hub of the pole wheel. This magnet system cooperates with a control pulse generator located in the inductor of the electromagnetic generator. This control pulse generator is adapted to switch the ignition switch at the point of ignition and thus to deliver a control voltage which causes the ignition (German Patent No. 19 of the Federal Republic of Germany).
37827 specification). However, in such a configuration, the control pulse generator is adapted to cooperate with a magnetic conductor fixed to the pole wheel, so that in order to adjust the ignition point, an inductor placed inside the pole wheel is required. The disadvantage is that the control pulse generator must be adjustable together with the inductor or independently of this inductor. In this type of electromagnetic generator, the pole wheel covers the front of the inductor, which is fixed to the engine casing, so that the fixing screw of the inductor or of the control pulse generator can be accessed from the outside for the purpose of adjusting the ignition point. In order to do this, a special opening must be provided at the bottom of this pole wheel. The object of the invention is to screw the inductor of an electromagnetic generator to the motor casing without adjustment, to fix the pole wheel to the end of the drive shaft of an internal combustion engine without adjustment, and then to screw the pole wheel to the end of the drive shaft of an internal combustion engine. The purpose of the invention is to allow adjustment of the ignition point by adjusting the

The ignition device according to the invention having the features set forth in claim 1 has the advantage that the ignition point can be adjusted from the outside in a simple construction and that the adjustment can be constantly checked. There is. With the arrangement of the invention, the adjustment of the magnet system for the control pulse generator and the adjustment of the magnetic pole wheel relative to the top dead center of the internal combustion engine can be carried out in one work step.

Advantageous embodiments of the ignition device of the present invention as set forth in claim 1 can be obtained by the configurations set forth in claim 2 and subsequent claims. In a particularly advantageous embodiment of the invention, the control magnet of the control pulse generator is fastened to an adjusting ring which can be releasably connected to the pole wheel at three fastening points and Rotatably fixed to the bottom of the magnetic pole wheel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention will now be described in detail with reference to the drawings. FIG. 1 shows an electromagnetic generator 10 for an ignition system for an internal combustion engine. This electromagnetic generator 10 serves to generate ignition energy and electrical energy for additional consumers. This electromagnetic generator 10 has a stationary inductor 11 . This inductor 11 has a screw 12
is screwed to the illustrated casing 13 of the internal combustion engine. This inductor 11 has a coil 14 arranged in a star shape around its outer periphery. This coil 14 is used to generate electrical energy for the ignition system and additional consumers. This inductor 11 is an electromagnetic generator 10
cooperates with the magnetic pole wheel 15 of. This magnetic pole wheel 15
is attached to the end 17 of the drive shaft of the internal combustion engine by means of a hub 16, so that it can be driven by the internal combustion engine (not shown). This bowl-shaped magnetic pole wheel 15 has a magnet ring 18 inside its peripheral wall. By suitable magnetization, this magnet ring 18 forms equally spaced magnetic poles with alternating polarity. The ignition system's electronic ignition switch is electrically powered. This control pulse generator 19 has an iron core (not shown) having a control pulse generating coil.
has a casing inside which is disposed. The end of the iron core is directed as a pole leg towards the pole wheel bottom 15a and there cooperates with a separate magnet system of the pole wheel 15.

This separate magnet system is configured as a control magnet 20 which is a permanent magnet. This control magnet 20 is arranged on an adjustment ring 21 and is fixed to the magnetic pole wheel 15 so as to be adjustable in the circumferential direction of the magnetic pole wheel 150. This adjustment ring 21 is fixed to the pole wheel bottom 15a at three fixing points 22 distributed at equal intervals over the outer circumference. At these fixing points 22, the adjusting ring 21 is each provided with a threaded hole 23;
It is removed from the screw hole 23. Therefore, this adjustment ring 21
can be disengaged from the pole wheel 15 at the fixing point 22 and pivotable in the circumferential direction relative thereto. The fixing screws 24 are inserted into the adjusting rings 21 from the outside through elongated holes 25 provided in the bottom part 15a of the magnetic pole wheel.
It is inserted into the range of the fixing point 22 of. In FIG. 2, the adjusting ring 21 is shown partially cut away, so that one of the elongated holes 25 in the bottom portion 15a of the pole wheel is clearly visible. Furthermore, an adjustment hole 26 is provided on the outer periphery of the adjustment ring 21. This adjustment hole 26 is located at the bottom of the magnetic pole wheel 15.
There is an opening 27 that is larger than the adjustment hole 26 provided in a. Another adjustment hole 2 is provided in the laminated core of the inductor 11.
8 are provided at the same radius with respect to the axis. As will be explained later, these two adjustment holes 2'6.28 are used to position the adjustment ring 21 relative to the inductor 11. The adjustment hole 26 of the adjustment ring 21 is connected to the magnetic pole wheel 15.
It is located just outside the control magnet 20 with respect to the axis of the control magnet 20 and is used to guide the adjustment pin 29. Furthermore, adjustment marks are provided on the outer periphery of the adjustment ring 21.
This is visible from the outside through a 3° opening in the pole wheel bottom 15a. The adjustment mark of this adjustment ring 21 is formed by a plurality of teeth 31 arranged in the circumferential direction.
It consists of Adjustment marks are likewise provided at the openings 30 on the pole wheel bottom 15a.

This adjustment mark consists of one tooth 32 opposite the tooth 31 of the adjustment ring 21, as shown in FIG. The control magnet 20 is received between a plurality of upwardly bent protrusions 330 punched out of the adjustment ring 21 and adhered to the adjustment ring 21 . The control magnet 20 is magnetized so that the north pole and the south pole are formed side by side in the circumferential direction of the magnetic pole wheel 150.

The north and south poles of the control pulse generator 19 cooperate with the not-illustrated magnetic pole legs of the control pulse generator 19 to generate a control signal.

In order to precisely adjust the ignition point, the control pulse generator 19 in the inductor 11 and the control magnet 20 in the pole wheel 15 are adjusted relative to each other, the adjusted position corresponding to the top dead center of the piston of the internal combustion engine. It is necessary.

In order to achieve both of these, we must first use an electromagnetic generator 10.
An inductor 11 is screwed to the casing 13 of the internal combustion engine, and a magnetic pole wheel 15 is attached to the end 17 of the drive shaft of the internal combustion engine.
is attached and fixed. The fixing screw 24 for the adjusting ring 21 is then loosened and the adjusting pin 29 is inserted into the adjusting hole 26 of the adjusting ring 21 in the direction of the arrow 34 until it hits the core of the inductor 11 through the opening 2T of the pole wheel bottom 15a. Plugged in. Further, by slightly rotating the magnetic pole wheel 15 or the adjusting ring 21, this adjusting pin 29 is inserted into the adjusting hole 28 of the inductor 11.

By positioning the two adjustment bores 26, 28 in this way along the axis 35, the control magnet 20 and the control pulse generator 19 are also positioned relative to each other. Now, the V of the internal combustion engine
The magnetic pole wheel 15 is rotated until the stone reaches top dead center. In this case, the predetermined position of the adjustment ring 21 relative to the inductor 11 is maintained by the adjustment pin 29. Since the fixing screw 24 has been loosened and inserted into the long hole 25 of the pole wheel bottom 15a, the pole wheel 15 can be rotated relative to the adjustment ring 21.

As soon as the piston of the internal combustion engine reaches top dead center, the fixing screw 24 is tightened and thus the ignition point of the ignition device is precisely adjusted. In the opening 30 of the magnetic pole wheel bottom 15a, the teeth 31 of the adjusting ring 21 and the magnetic pole wheel bottom 15 are connected.
The position of the & tooth 32 allows the exact adjustment position of the ignition point to be ascertained. This position can also be identified by a suitable color mark or the like. This post-adjustment or additional adjustment of the ignition point can be carried out by loosening the fixing screw 24 somewhat, inserting a screwdriver into the opening 30 in the pole wheel bottom 15a and turning the adjusting ring 21 by the desired value for the post-adjustment or additional adjustment. This is possible by letting

The invention is not limited to the illustrated embodiment; for example, instead of a permanent magnet, a magnetic conductor cooperating with a fixed control pulse generator may be adjustably attached to the pole wheel. It is also possible, instead of the adjusting ring, to provide for an active part of the one-inductive control pulse generator, such as an adjusting segment or another adjustable device, which rotates together with the pole wheel. The adjustment hole provided in the inductor 11 may be provided at the control pulse generator or at another location with a suitable radius relative to the axis. Also, other adjustment means can be used instead of the adjustment holes and adjustment pins. It is important to position the rotating part of the inductive control pulse generator relative to the fixed control pulse generator in order to adjust the ignition point and at the same time to position the pole wheel in the desired position.
It is advantageous to fix the rotating part of the control pulse generator to the pole wheel, adjusted to the top dead center of the piston of the internal combustion engine. For this purpose, the rotating part of the control pulse generator must be circumferentially adjustable and fixed to the pole wheel.

[Brief explanation of the drawing]

1 is a cross-sectional view of an electromagnetic generator of an ignition device according to the invention with an adjustable control magnet, and FIG. 2 shows a pole wheel of the electromagnetic generator and an adjustable control magnet disposed at the bottom of the pole wheel. FIG. 3 is a diagram showing an adjustment ring and a control magnet provided on the adjustment ring. 1... Electromagnetic generator, 2... Inductor, 3...
Screw, 4...Casing, 5...Coil, 6...
Magnetic pole wheel, 15a... Magnetic pole wheel bottom, 16.
...Hub, 17... End, 18... Magnet ring, 1
9... Control pulse generator, 20... Control magnet, 21
...adjustment ring, 22...fixing point, 23...screw hole, 24...fixing screw, 25...long hole, 26...
・Adjustment hole, 27...Opening, 28...Adjustment hole, 29・
... Adjustment gear, 30... Opening, 31.32... Teeth,
33...Protrusion, 34...Continued from page 1 0 Inventor: Beter Wuerthle, Federal Republic of Germany, Schwarbach Eichwersenstrasse 36 0 Inventor: Karl Wuerthle, Federal Republic of Germany, Schaffhof Goethestrasse 4

Claims (1)

[Claims] 1. An ignition device for an internal combustion engine, which includes an electromagnetic generator for generating ignition energy, and a magnetic pole wheel of the electromagnetic generator driven by the internal combustion engine is arranged in a circumferential direction. an inductively controlled pulse generator comprising magnetic poles of alternating polarity distributed between the poles, which cooperate with a stationary inductor to control the electronic ignition switch at the point of ignition; The control pulse generator is composed of a fixed control pulse generating coil having an iron core, and the ends of the control pulse generating coil are fixed to the magnetic pole wheel of the control magnet system as magnetic pole legs. internal combustion engine, characterized in that the rotating part of the control magnet system is fixed to the pole wheel (15) so as to be adjustable in the circumferential direction. Engine ignition system. 2. The rotating part of the control magnet system is a control magnet (20
), the control magnet (20) is connected to the adjustment ring (21
), the adjustment ring (21) can be disengaged from the pole wheel (15) at six fixing points (22) and can be pivoted relative to the pole wheel bottom (15a). The ignition device according to claim 1, wherein the ignition device is fixed to. 6. The adjustment ring (21) has a screw hole (23) at the fixed point (22), and each of these screw holes (23) corresponds to a long hole provided at the bottom of the magnetic pole wheel (15a). (25), and these long holes (2
5), the fixing screw (24) is inserted from the outside through the fixing point (2).
The ignition device according to claim 2, which is adapted to be inserted into the range of item 2). 4. An adjustment hole (
26), and an adjustment hole (2B) provided in a part of the inductor (11) at the same radius with respect to the axis faces this adjustment hole (26), and both of these adjustment holes (26, 28) pass through the adjusting pin (29)
7. Ignition device according to claim 2 or 6, wherein the ignition device is positioned relative to one another on an axis (35) by. 5. The adjustment hole (26) of the adjustment ring (21) is arranged radially outside the control magnet (20);
An ignition device according to claim 4. 6. An adjustment mark is provided on the outer periphery of the adjustment ring (21), and this adjustment mark is located at the bottom of the magnetic pole wheel (1).
5a), which is visible from the outside through an opening (30) provided at the opening (30), at which the magnetic pole wheel (15) has a corresponding adjustment mark. The ignition device according to item 2. It consists of a plurality of teeth (31) arranged in a direction, one tooth (31) opposite to which the adjustment mark provided at the opening (30) of the pole wheel bottom (15a). 32). The ignition device according to claim 6, comprising: 8. The control magnet (20) is received between the projections (33) of the adjustment ring (21) and
21) The ignition device according to claim 2, wherein the ignition device is bonded to the igniter according to claim 2. 9 The control magnet (20) is magnetized in the circumferential direction to form N and S poles, and these N and S poles are connected to the magnetic pole wheel (1
3. The ignition device according to claim 2, wherein the ignition device faces both pole legs of the control pulse generator (19) at a predetermined angular position of 5).