SU767387A1 - Alternator for internal combustion engine - Google Patents

Description

one

The invention relates to electrical equipment of vehicles, in particular, to alternators for an internal combustion engine, designed to power a signal-signal device and a contactless ignition system.

Alternating current generators for internal combustion engines are known, which contain a flywheel with permanent magnets magnetized along an asymmetrical circuit, and a base with coils for feeding the charging circuit of a storage capacitor is unlimited.

clock ignition system, to power the lighting circuit. and to control the thyristor contactless

I ignition system

The disadvantage of such generators lies in the low power of the lighting coil due to the asymmetrical magnetization scheme of the flywheel magnets.

Also known are alternators for an internal combustion engine comprising a rotor with a constant plug and poles, a stator on whose shoes the generating windings are arranged, a ferromagnetic cover mounted on the generator stator, and a sensor whose stator is located on a ferromagnetic cover, and the rotor is tough

5 mounted on the generator rotor. The disadvantage of these generators is the complexity of their design, due to the fact that they have a special additional

 A magnet equipped with round pole tips for driving a control signal in the sensor winding.

The aim of the invention is

15 simplifies the design of the generator, as well as providing automatic step-by-step adjustment of the ignition support angle.

The goal is achieved

20 in that the rotor of the sensor is made in the form of a ferromagnetic disk, magnetically connected with one of the poles of the rotor of the generator and provided with at least one slot,

25a, the sensor stator is made in the form of a ferromagnetic rod with a winding, magnetically connected with the ferromagnetic cover of the generator and installed perpendicular to the plane

thirty . rotation of the disk, as well as the fact that

ferromagnetic disk equipped with at least two nv | Avne the great slots.

FIG. 1 shows the design of the alternator) FIG. 2 is a section A-A in FIG. 1) in FIG. 3 - sensor rotor; Fig. 4 is a diagram of the change in the flow of the idle stroke in the sensor stator versus the angle of rotation of its rotor per revolution; figure 5 - diag1mma EMF idler code winding of the sensor; in fig. 6 is a no-load emf chart after elimination in FIG. 7 shows an embodiment of a sensor rotor with uneven slots on the disk in FIG. 8 - Diagracade of changing the flow in the stator of the sensor for the operation of its rotor, as shown in Fig. 7; in fig. 9 is a diagram of the EMF of the sensor winding corresponding to the no-load flow in FIG. 8; in fig. 10 - EMF diagram of the winding of the sensor after rectification; in fig. 11 the dependence of the angle of ignition advance nyy on the frequency of rotation with stepwise angle control. The alternator contains a rotor 1 with a permanent magnet and a stator 2, on pole shoes 3 of which there are generators {) winding 4, feeding the charging circuit of the contactless ignition system and the light-signaling circuit (Fig. 1). A ferromagnetic cover b is attached to the iron 5 of the stator 2 of the generator, on which is located the stator of the sensor, made in the form of a ferromagnetic rod 7 with a winding B (Fig. 2) Winding 8 is located between the ferromagnetic cover of the generator and the special ferromagnetic cap 9, magnetically connected to the cover b. Sensor 7 core 7 The cap 9 is magnetically connected to the generator cover 6 and has axial displacement for adjusting the working air gap between the end 10 of the rod 7 and the sensor rotor made in the form of a ferromagnetic disk 11. Dis 11 is provided with a magnetic pole 12 formed by two slots 13 and 14 (Fig. 1,3,7). The disk 11 is fixedly mounted on the rotor 1 of the generator and the junction connected with one of the poles. rotor 1 through ferromagnetic part 15 ...

/,, ... g. ,, ..,.

STEPH: a; t6go adjusting the angle of advance: the ignition frequency of rotation of the ferromagnetic disk 11 is equipped with equal slots. 16 and 17 (Fig. 7). The number of slots in the disk 11 corresponds to the number of jumps in the advance angle of the ignition. The angular distance between the pryures corresponds to the magnitude of the jump-wise change in the angle of advance of the scale.

The alternator operates as follows.

When the rotor of the generator rotates in its windings 4, an emf is applied, which is used to power the lighting and the charging circuit of the storage capacitor of a contactless ignition system (not shown). When the pole 12 of the disc 11 is incident on the end 10 of the sensor 7 stator 7, the magnetic flux is closed from the N pole of the rotor magnet 1 of the generator through part 15 to the pole 12 of the disc 11, then through the air gap on. the end face 10 of the sensor stator 7 of the sensor, the cap 9, the cover b, the generator stator iron 5, the pole shoe 3 and the working air gap of the generator to the pole S of the rotor magnet 1 of the generator.

. When this pulsating magnetic flux F (Fig.4) excites in the winding 8 of the sensor alternating voltage EMF (Fig. 5), the positive half of which. b) used to control the electronic key, a contactless ignition system (not shown).

The slots 16 and 17 on the disk 11 (Fig. 7) provide a pulsating flow F in the rod 7 with the formation of, respectively, GLF ,. IlF4 (Fig. 8) and EMF of idling; stroke, and „, and„ respectively (Fig. 9)

At the same time, the positive half-waves of the EMF (Fig. 10) will provide, with increasing frequency of rotation, a stepwise automatic change in the angle of the electronic key of the contactless ignition system, and thereby a change in the advance angle of the ignition in accordance with the characteristic shown in FIG. eleven.

At frequencies n of the engine start, the electronic key is controlled by the first pulse EMF amplitude reaches the level of unlocking the electronic key, marked in FIG. 10-direct off When increasing the engine speed to n, j, the amplitude of the second pulse (i, f f control reaches the level of the electronic key and the ignition angle changes abruptly by the value o ("(Fig. 10 and 11)).

Claims (2)

When the rotation frequency reaches the value n, the ignition advance angle changes by the value of ° C. The angles ot oi are the angles of an automatic smooth change in ignition advance caused by an increase in the steepness of the control signal when the rotational frequency changes, respectively, from n to n to n. from rotational speed, ensuring the preset jumps of the angle, which allows to improve the power indicators of the internal combustion engine. Claim 1. An alternating current for an internal combustion engine comprising a rotor with a permanent magnet and poles, a stator on whose shoe there are generating windings, a ferromagnetic cover mounted on the generator stator, and a sensor whose stator is located on a ferromagnetic cover and the rotor rigidly mounted on the rotor of the generator top, characterized in that, in order to simplify the construction, the rotor of the sensor is made in the form of a ferromagnetic disk, magnetically connected to one of the poles of the rotor of the jropa and equipped About at least one slot, and the sensor stator is made in the form of a ferromagnetic rod with a winding, magnetically coupled NS5GR with a ferromagnetic cover of the generator and installed perpendicular to the plane of rotation of the disk. 2. The generator according to claim 1, is characterized by the fact that, in order to provide automatic stepwise adjustment of the ignition advance angle, the ferromagnetic disk is provided with at least two unequal slots. Sources of information taken into account in the examination 1.Patent of Germany 1539205, cl. 46 K 3/08, published. 1967. 2. Authors certificate of the USSR 502130, cl. F 02 P 5/04, 1976. .-F Sp-f-: DYy1 "" In II-: l.;. W - (. . . i . . . :: / -V.-F. . : W 1put.3. " tf (.f M Y .f R / ff rv / f (Put.7 tr, cat M flffw. ai iput.f Rig: 8 Vi . D V fy, r Olt g "" ij put. to