JPS60164667A - Distributor - Google Patents

Abstract

PURPOSE:To prevent erroneous operation and the generation of early ignition and knocking by arranging an ignition coil so that the axis of a main magnetic flux due to the electric conduction of the primary coil crosses at right angles with a rotary shaft and the direction of the induction of the magnetic flux of a revolution-signal generating means. CONSTITUTION:When the magnetic flux PHIs for signals which crosses with a pick-up coil 4d through the revolution of a signal rotor 4a varies in correspondence, a signal voltage Vs is generated onto the coil 4d and is input, and an ignition control unit controls the electric conduction of an ignition coil. Therefore, a magnetic flux is generated by the primary current I1 which flows in the primary coil 2a, and the leak magnetic flux PHIl is distributed in correspondence with the primary current I1 which flows in the primary coil 2a. The signal voltage Vs generated in the coil 4d generates the normal wave-form which is not influenced by the leak magnetic flux PHIl, since the leak magnetic flux PHIl does not cross with the coil 4. Therefore, normal operation is repeated without generating erroneous operation, since the ignition control unit is operated, and the generation of early ignition and knocking can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a power distributor having a built-in rotation signal generating means and an ignition coil that operates by inputting the signal, particularly by leakage magnetic flux in one ignition coil.

The present invention relates to a structure that makes it possible to prevent the influence of rotation signal generating means.

[Prior art]

FIG. 1 shows a general ignition device to which the present invention is applied.

In the figure, 1 is a DC power supply, 2 is an ignition coil, 2a and 2b are the primary and secondary coils of the ignition coil 2, 3 is an ignition control unit, 4 is a rotation signal generating means having an electromagnetic pickup structure, 4a is a signal rotor, 4b is a stator, 4c is a permanent magnet, 4d is a pickup coil, and 5 is a power distribution section.

5a is a rotating electrode portion of the power distribution unit 5, 5b is a stationary electrode portion thereof, and 6 is a spark plug.

Figure 2 shows the ignition signal voltage VS generated by the pickup coil 4dK and the primary current 11 flowing through the ignition coil 2.
The waveforms of each are shown.

Further, in the figure, the voltage level VON is the operating level of the point μ control unit 3, and the horizontal axis indicates the time t.

FIGS. 3(a) and 3(b) show the power distribution device t/C according to the present invention.
The structure of the ignition coil 2 subjected to P3M is shown. Figure 3(b)
shows a sectional view taken along A-ARK in FIG. 3(a).

In the figure, 2e is the insulator interposed between the primary coil 2a and the secondary coil 2b, and 2d is the iron core h constituting the V & name.
2e is a butting surface of the iron core 2d, and 21 is a gap provided in the iron core 2d.

The above-mentioned ignition coil is as shown in Figures (a) and (b).

9. The magnetic path is composed of an iron core 2d having a figure 8 shape.
The primary coil 2a and the secondary coil 2b are each connected to the above iron core 2d.
wrapped around the central leg of

FIGS. 4(a) and 4(b) show the ignition coil 2. The specific configurations of the ignition control unit and the rotation signal generating means 4i are shown in detail.

In the figures, (a) is a top view and (1 can) is a side view.

In the same figure, 2g is the output part of the secondary coil 2b, 2g is the output part of the secondary coil 2b,
h denotes both terminals of the primary coil 2a, 2f denotes a coil case provided to surround the primary coil 2a and secondary coil 2b, and 7 constitutes the main housing of the power distributor body. ...Using, 7a is two mounting flange parts provided in a part of the housing 7, 7b is 8 screw holes for screws for fixing the cap 14 to the housing 7, 8 is an engine ( a drive shaft rotated from (not shown);
Reference numeral 9 indicates an oil seal, IO#'i centrifugal advance mechanism, which is composed of gray) 10a + weight 10b and pace 10c. Reference numeral 11 indicates a rotating shaft provided to rotate relative to the drive shaft 8; Numeral 12 is a screw for preventing the rotating shaft 11 from coming off, and 13 is fixed to the tip of the rotating shaft 11 to support the rotating electrode portion 5a. Power distribution rotor.

14 is a cap, 14a is a high voltage conductor, 14b and 14e are first and second cap electrodes provided in the cap 14, and 14C and 14f are the two cap electrodes 14.
b, coil springs 14 each housed in 14e;
d and 14g are the two cap electrodes 14b and 14e.
installed inside.

The coil springs 14c and 14fK are electrically connected contacts, and 14h is a power distribution output section for accommodating stationary electrode sections 5b, which are provided along the upper circumference of the cap 14 in the same number as the engine. An advance mechanism, 15a is a control rod of the vacuum advance mechanism 15, and 15b is the control rod 15a.
A connecting pin for connecting the movable plate 16 and the lower movable plate 16, 16Fi, and the movable grate provided so as to be towed and rotated around the rotating shaft 11.

17 is a screw for fixing the ignition control unit 3 to the movable plate 16.

FIG. 5 is a magnetic flux correlation diagram showing the relative relationship between the ignition coil 2 and the rotation signal generating means 4.

In the figure, ΦB is a signal magnetic flux generated from the permanent magnet 4c, which passes through the stator 4b, the signal rotor 4a, and the rotating shaft 11, as shown by the solid line in the figure, and is transferred to the pickup coil ILA force-I. On the other hand, Φ represents that out of the magnetic flux generated when the primary coil 2a of the 1st ignition coil 20 is energized, it passes through the iron core 2d and flows into the surrounding space as shown by the broken line in the figure. As shown in the figure, the magnetic flux mainly passing through the rotating shaft 11 inevitably exhibits a distribution that interlinks with the pickup coil 4d.

Furthermore, FIG. 6 shows the signal magnetic flux Φ8 when the conventional power distributor having the configuration shown in FIGS. 4 and 5 is operated.
．． The waveforms of the leakage magnetic flux Φl, the ignition signal voltage Vs generated in the pickup coil 4d, and the primary current II flowing in the ignition coil 2 are shown.

Next, the operation will be explained.

First, consider the general configuration shown in FIG.

When the signal rotor 4a is rotated by the engine via the drive shaft 8 and the rotation shaft 11, a signal voltage vs shown in FIG. 2 is generated. Now, at time t, this signal voltage vs is at the operating level V of the ignition control unit 3. , 41ζ
Then, if the operation release level of the ignition control unit 3 is set to approximately Ov of the signal voltage Vs, then at the first time tl, the signal voltage vB becomes When it reaches approximately OV, the primary current II is cut off,
The high voltage generated in the secondary coil 2b of the ignition coil 2 is transmitted from the rotating electrode section 5a to the stationary electrode section 5b to the spark plug 6.
It is something that spreads fire.

Due to the above-mentioned energization, an effective magnetic flux Φ is generated in the iron core 2d of the ignition coil 2. occurs and is distributed from the central leg to both lateral legs, as shown by the broken lines in FIG. Furthermore, in addition to the effective magnetic flux ΦU existing in the iron core 2d, the iron core 2d
At the same time, there is also a leakage magnetic flux Φ distributed in the surrounding space outside the .

Next, Fig. 4(a) shows a case in which an ignition device that basically operates as described above is operated in a power distribution device.
This will be explained using the configuration in (b).

The rotational force of the drive shaft 8 rotates the rotary shaft 11 via the centrifugal advance mechanism 10, and the signal q-adjustment 4a, which is identified by a predetermined relationship with the rotary shaft 11, also rotates.

Then, the four protrusions (in this case, the engine is assumed to be a four-cylinder engine; the number is the same as the number of cylinders) provided on the outer periphery of the signal rotor 4a. It faces or is separated from the stator 4b. That is, when they face each other, the magnitude of the magnetic resistance passing through the permanent magnet 4a, stator 4b, signal rotor 4a, and rotating shaft 11 is minimum, and therefore, the signal magnetic flux Φ8 interlinking with the pickup coil 4d is maximum. becomes.

Corresponding to the waveform diagram shown in FIG. 2, the time when the protrusion provided on the outer periphery of the signal rotor 4a and the stator 4b face each other corresponds to time tl in the diagram. On the other hand, at a substantially intermediate angular position in the protrusion provided on the signal rotor 4aK, that is, at a position rotated by 45 degrees from the angular positional relationship shown in Fig. M4 (a), the magnitude of the magnetic resistance is maximum. In addition, the signal magnetic flux ΦS intersecting with the pickup coil 4d is at its minimum, which corresponds to the vicinity of time 1 in FIG.

The above-mentioned change in the magnetic flux interlinking with the pickup coil 4d is what induces the pickup coil 4dK signal voltage Vs. As shown in FIG. 4, the pickup coil 4d.

It is integrated with the ignition control unit section 3 and introduced into the ignition control unit 3. Thereby, the signal voltage VS is applied to the ignition control unit 3, which controls the ignition coil 2 to be energized at one time point t and cut off at time t1, as described above.

Due to the above-mentioned interruption, a high voltage is induced in the secondary coil 2b of the first ignition coil 2, and the induced high voltage is transmitted from the exit portion 2g of the first ignition coil 2 to the contact 14d of the cap 14.
, coil spring 14c.

It is transmitted to the rotating electrode section 5a via the first cap electrode 14b, the high voltage conductor 14a, the second cap electrode 14e, the coil spring 14f, and the contactor 14g.

Since the rotating electrode section 5a is opposed to the stationary 1F electrode section 5b corresponding to the cylinder of the engine at that time, the high electric current causes the stationary electrode section 5b to catch fire.

Electrical discharge is made to one of the spark plugs 6 via a high-voltage cable (not shown).

In the above-described operation, the magnetic flux generated from one ignition coil 2 and the signal voltage Vs that is unaffected by this will be explained using FIGS. 5 and 6.

As shown in the explanation of FIG. 3 above, when the primary coil 2aK of one ignition coil 2 is energized, an effective magnetic flux Φ is generated inside and outside the iron core 2d. , leakage magnetic flux Φ occurs. Among these magnetic fluxes, the leakage magnetic flux Φ that protrudes from the iron core 2d and passes through the outer space includes the inside of the one-rotation shaft 11 and the inside of the pickup coil 4j, as shown in FIG. There is a magnetic flux passing through it. As mentioned above, the signal magnetic flux ΦS of the permanent magnet 4c changes in accordance with the rotation of the signal q-e 4a, but the leakage magnetic flux Φ generated by the primary coil 2a of the first ignition coil 2 is It changes depending on the amount of current applied to 2a.

These temporal changes are shown in FIG. The maximum value is shown at time t, and the minimum value is shown at time t.

On the other hand, the leakage magnetic flux Φ is zero from time tl to time t, and at time t2, the primary coil 2 of the ignition coil 2
When electricity is applied to a, magnetic flux is generated and immediately.

At the next time point t4, for the reason described below, there are zero and two times, and one time point 1. In this case, magnetic flux is generated.

As shown in FIG. 5, the direction of the leakage magnetic flux Φ in the rotating shaft 11 is opposite to the other signal magnetic flux Φ8, so the waveform of the leakage magnetic flux Φ shown in FIG. The polarity is reversed.

Hereinafter, the core of malfunctions in conventional devices will be explained.

In FIG. 6, in response to changes in the signal magnetic flux ΦS, the signal voltage vB of the pickup coil 4d gradually rises from Ov at time t6, and exceeds the operating level VON of one ignition control unit 3 at time t. , the primary coil 2a of the ignition coil 2 is energized, and the secondary current 1 begins to flow. At the same time, leakage magnetic flux Φ also occurs as described above. The waveform of the composite magnetic flux of this leakage magnetic flux Φ and the signal magnetic flux ΦB is shown as Φs+Φl in the figure. Hereinafter, this Φ8+$ is referred to as the composite magnetic flux Φt.

As described above, due to the generation of the leakage magnetic flux Φl, the composite magnetic flux Φt is distorted as shown in the figure. That is, at time t, the composite magnetic flux Φt temporarily decreases. Therefore, the signal voltage Vs induced in the pickup coil 4d also decreases temporarily and drops to near Ov at one time point t4. Due to this decrease in the signal voltage Vs, the operation of the ignition control unit 3 is canceled and the energization of the primary coil 2a of the ignition coil 2 is interrupted. Therefore, at the same time, the leakage magnetic flux Φ also becomes zero, and the composite magnetic flux Φ
The component of t is only the signal magnetic flux Φ8.

Since this composite magnetic flux Φt also increases with the passage of time, the signal voltage VS also increases again and crosses the operating level VON of the ignition control unit 3 again at time t6. Then, the primary coil 2a of the ignition coil 2 is energized again, and leakage magnetic flux Φt is generated, distorting the waveform of the composite magnetic flux Φt.

Again, the primary coil 2a of the ignition coil 2 at time ts
By energizing, the composite magnetic flux Φt decreases, and therefore the signal voltage vB also temporarily decreases, but in the content shown in FIG. 1, it does not decrease at Ovt.

The ignition control unit 3 includes a primary coil 2a of one ignition coil 2.
It is impossible to cut off the energization, and the energized state is maintained.

Next, at time t1, which is the ignition timing of one engine.

First, the signal magnetic flux ΦB shows a peak value and its rate of change becomes zero, so the signal electric flux I! The magnitude of Evs is also OV. Therefore, the ignition control unit 3 is connected to one of the ignition coils 2.
The energization of the secondary coil 2a is cut off, and a high voltage is generated in the secondary coil 2b. On the other hand, the primary coil 2aK of the ignition coil 2
As the magnitude of the flowing current II becomes zero, the leakage magnetic flux Φ also becomes zero. Therefore, the composite magnetic flux Φt also rapidly rises to the level of the signal magnetic flux Φ8 at approximately the same time. Due to this rapid change in magnetic flux, a signal voltage Vs indicating the direction of pressure is induced in the pickup coil 4d again. When the magnitude of the signal voltage Vs indicating the positive direction exceeds the value of the operating level VON of the ignition control unit 3, the primary coil 2nij of the ignition coil 2 is energized again.

Then, at a certain time point t3 after a certain period of time has passed.

When the signal voltage Vg becomes zero again, an operation is performed in which the primary current It flowing through the primary coil 2a of the ignition coil 2 is cut off.

In the above explanation, the details of the operation during one cycle of KjJ have been described. Each of these operations, that is, the ignition device, involves the primary coil 2aK of the ignition coil 2, which is connected to the flying spark operation.
During the operation of cutting off the flowing primary current I, at time t
The operations at 4 and t result in malfunctions.

These malfunctions cause premature ignition in the engine.

Furthermore, it is well known that this is a very inconvenient thing that causes disadvantages such as knocking.

The cause of the above-mentioned malfunction is that the leakage magnetic flux Φ from the ignition coil 2 is interlinked with the pickup coil 4d.As a countermeasure for this, the ignition coil 2 and the rotation signal generating means 4 are
It was extremely difficult to do this except to separate them by a large distance or to completely eliminate the leakage magnetic flux Φl of the iron core 2d.

However, the method of separating the ignition coil 2 and the rotation signal generating means 4 has a limit because the configuration and dimensions of the power distributor have design limitations. What to do.

Since the ignition coil 2 has a configuration based on direct current excitation, a gap 2f as shown in FIG. 3 is provided as described above in order to prevent saturation of the iron core 2d.

Therefore, some degree of leakage of magnetic flux is inevitable.

As mentioned above, in the conventional device (an example is shown in FIG. 4, and its main points are shown in FIG. 5), it is possible to configure a power distribution device as a mechanism of an equal ignition device that operates in addition to normal operation. It was something that didn't exist.

[Summary of the invention]

The present invention has been made in order to eliminate the drawbacks of the conventional devices as described above, and the present invention has been made in such a way that the main magnetic flux axis of the above-mentioned ignition coil is changed by energizing the primary coil of the ignition coil into a magnetic flux sensitive system in the above-mentioned rotation signal generating means. It is an object of the present invention to provide an excellent power distributor that does not malfunction by being arranged so that the direction and the rotation axis are perpendicular to each other.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to illustrated drawings.

FIG. 7 shows an embodiment of the present invention.

FIG. 5(a) is a top view, and FIG. 2(b) is a side view.

FIG. 7, which shows an embodiment of the present invention, and FIG. 4, which shows an embodiment of a conventional device, differ only in the arrangement of the ignition coil 2, and the other configurations are completely unchanged.

That is, in FIG. 7, the primary coil 2a of the ignition coil 2
The axes of the secondary coil 2b of the ignition coil 2 are orthogonal to the drive shaft 8 and the rotation shaft 11, respectively.

In addition, the primary terminal 2h and the secondary terminal 2 of the ignition coil 2
The position of h is the same as in the conventional device as shown in the figure.

Furthermore, FIG. 8(a) is an explanatory diagram of the correlation of magnetic flux showing the relative relationship between the ignition coil 2 and the rotation signal generating means 4. The figure (b) is an explanatory diagram of the symbols indicating the direction of magnetic flux.
Each mark shall indicate the direction of passage from the front side of the paper to the back side.

Using the above magnetic flux code, the leakage magnetic flux Φ when the ignition coil 2 is energized! The distribution of is shown in the same figure (a).

First, in the part whose magnetic path is the central leg of the iron core 2d and its surrounding area, that is, inside the primary coil 2a of the ignition coil 2, the direction of the leakage magnetic flux Φ is as shown in the paper in FIG. 8(a). In the direction passing from the back side to the front side, on the other hand, the iron core 2
Contrary to the above, in the space on both side legs of d and the surrounding area thereof, that is, on the outside of the first ignition coil 2a, the direction of the leakage magnetic flux Φ is the direction passing from the front side to the back side of the page in FIG. 8(a). This shows the distribution as follows.

These leakage magnetic fluxes Φ are orthogonal to the axial direction of the pickup coil 4d, and therefore, in principle, cannot be linked to the pickup coil 4d. Therefore, what interlinks with the pickup coil 4d is only the signal magnetic flux Φ8 generated from K and the permanent magnet 4c as shown in FIG. 8(a). The path of this signal magnetic flux ΦB is the same as in the conventional case described above.

The operation of one embodiment of the present invention configured as described above will be described.

When the signal rotor 4a is rotated via the rotary shaft 11 by the rotation axis 11, the magnetic flux interlinking with the pickup coil 4d, that is, the signal magnetic flux Φ8, is transferred to the signal rotor 4a as in the conventional operation described above. It changes depending on the rotation angle.

As a result, as shown in FIG. 9, a signal voltage vB is generated in the pickup coil 4d, and this signal voltage Vs
is input, and the ignition control unit 3 controls the energization of the ignition coil 2.

Now, to explain the point in time when the primary coil 2a of the ignition coil 2 is energized, magnetic flux is generated by the primary current 11 flowing through the primary coil 2a of the ignition coil 2 as described above, and the generated magnetic flux Among them, leakage magnetic flux Φ is also caused by ignition coil 2.
The distribution is as described above, depending on the magnitude of the primary current If flowing through the primary coil 2aK. However, as described above, the leakage magnetic flux Φ is not interlinked with the pickup coil 4, and therefore the signal voltage Vs generated in the pickup coil 4d has a normal waveform that is not affected by the influence. , occurs as shown in FIG.

As described above, the ignition control unit 3 operates according to the signal voltage Vs generated in the pickup coil 4d.

It operates at the corresponding time t of the operation level VON, energizes the primary coil 2a of the ignition coil 2, and the signal voltage vB, which is the operation release level, becomes Ov at the time 1.
．． These series of operations do not cause malfunctions as in the case of the conventional device described above, but rather repeat normal operations.

As explained above, the present invention aims to solve the problems by adjusting the mutual relationship between the ignition coil 2 and the rotation signal generating means 4 in a power distributor with a built-in ignition coil. , in detail, the pickup coil 4d
The axis of the primary coil 2a of the ignition coil 2 and the secondary coil 2b of the ignition coil 2 are perpendicular to the rotation signal generating means 4 whose axial direction coincides with that of the rotating shaft 11, It is characterized by the fact that do not have.

Therefore, for example, there is no problem in constructing various mechanical parts such as the above-mentioned high-voltage power distribution mechanism using electronic circuits.

Alternatively, only the ignition control unit may be separated from the main body of the power distributor.

〔Effect of the invention〕

As explained above, according to the present invention, there is provided a rotary shaft provided inside the power distribution device main body and adapted to be driven by the engine, a signal rotor disposed on the rotary shaft, and a rotary shaft facing the signal rotor. In this way, it is arranged inside the power distributor main body.

As the signal rotor rotates, a change in magnetic flux is detected and an output signal is output. It includes a rotation signal generation means having a magnetic flux sensing direction in the axial direction of the signal router, a primary coil and a secondary coil, and is transmitted to the primary coil in response to an output signal output from the rotation signal generation means. an ignition coil disposed in the power distributor main body, the main magnetic flux axis of which is caused by energization of the ignition coil to the primary coil to be controlled by the magnetic flux in the rotation signal generating means; Since the sensor is disposed so as to be orthogonal to the sensing direction and the rotation axis, an excellent effect is achieved without causing malfunction.

[Brief explanation of drawings]

Figure 1 is a general ignition circuit diagram to which the present invention is applied, Figure 2 is a general ignition circuit diagram to which the present invention is applied;
3 is a cross-sectional view showing the configuration of the ignition coil, FIG. 4 is a structural diagram showing a conventional power distributor, and FIG. 5 is a diagram of the ignition coil and rotation signal generating means in the conventional case. An explanatory diagram showing relative positions, FIG. 6 is an operating waveform diagram of a conventional device, FIG. 7 is a structural diagram of a power distributor showing an embodiment of the present invention, and FIG. 8 is an ignition diagram in an embodiment of the present invention. FIG. 9 is an explanatory diagram showing the relative positions of the coil and the rotation signal generating means, and is an operation waveform diagram in the case of one embodiment of the present invention. 2...Ignition coil, 2a...Primary coil, 2b...
- Secondary coil, 4... Rotation signal generating means, 4a...
Signal rotor, 11...Rotation axis. In the figures, the same reference numerals indicate the same or equivalent parts. Agent Masuo Oiwa Figure 1 Figure 3 Figure 4 (a) Figure 5 Figure 7

Claims (1)

[Claims] (1) A rotating shaft provided inside the power distributor body and driven by the engine, a signal rotor provided on the rotating shaft, and a rotating shaft of the power distributor body facing the signal rotor. It is disposed inside and outputs an output signal by detecting changes in magnetic flux due to the rotation of the signal rotor. It includes a rotation signal generation means having a magnetic flux sensing direction in the axial direction of the signal rotor, a primary coil and a secondary coil, and corresponds to an output signal output from the rotation signal generation means. An ignition coil disposed in the main body of the power distributor is arranged so that energization to the primary coil is controlled. A power distributor characterized in that the ignition coil is disposed such that a main magnetic flux axis caused by energization of the primary coil is perpendicular to the magnetic flux sensing direction and the rotation axis of the rotation signal generating means.