JPS59226278A - Distributor for restraining noise electromagnetic wave of internal-combustion engine - Google Patents

Abstract

PURPOSE:To reduce the electric discharge starting voltage and prevent generation of noise electromagnetic wave by a method wherein the surface of an electrode supplying a high voltage to the electrode for the distributor is coated evenly with the layer of varnish consisting principally of silicon excepting the surface whereat a contact is contacting with the electrode. CONSTITUTION:The distributor 1, held by a rotary driving shaft 2, is provided in the vessel of the distributor and the electrode 3 for the distributor is arranged so as to be opposed to the distributor 1 through an electric discharge gap (g) between the electrode 3 and a side terminal electrode 4. The contact 5 is pressed against the rotary center of the electrode 3 by a spring 6 and primary high voltage wiring 7, supplying the high voltage from an ignition coil to the electrode 3 through the contact 5, is provided in the device. Both surfaces of the electrode 3, excepting a part whereat the contact 5 is contacting with the electrode 3, are coated evenly with the layer 9 of varnish consisting principally of silicon. According to this method, the volume and surface area of the varnish layer 9 at the discharging end are reduced. Accordingly, the electric discharge starting voltage may be reduced and generatin of noise electromagnetic wave may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for suppressing noise radio waves generated from an ignition device of an internal combustion engine, and in particular from between a distribution Mi pole and a side terminal electrode that constitute a power distribution device of an ignition device. This invention relates to a noise radio wave suppression power distribution device that suppresses noise radio waves.

An overview of the configuration of a conventional power distributor of this type is shown in FIG. In this Figure 1, code 0) is the rotational drive shaft (2) inside the vessel.
The electron distribution electrode (3) held in the electron distribution electrode (3) is provided on the electron distribution electrode (1) and is opposed to the side terminal electrode (4) with a discharge gap (ri) interposed therebetween. 5) is a contact that is pressed into contact with the rotation center of this distribution electrode (3) by a spring (6), and (7) is a contact that is pressed into contact with the rotation center of this distribution electrode (3), and (7) is a contact that is pressed into contact with the rotation center of this distribution electrode (3), and (7) is a contact that is pressed into contact with the rotation center of this distribution electrode (3), and (7) is a contact that is pressed into contact with the rotation center of this distribution electrode (3).
3) is a primary high-voltage wiring for supplying high voltage from the ignition coil; (8) is made of silicone-based phenol applied to the entire surface of the discharge end of the distribution electrode (3).

However, in this conventional configuration, -order high voltage wiring (7)
When a high voltage is applied to the distribution electrode (3) through the contactor (5), a phenol (8) mainly composed of silicon is applied to the entire discharge end of the distribution electrode (3). Due to the action of noise radio waves are suppressed. However, on the other hand, since the silicon dielectric material is deposited over the entire surface of the discharge end of the electron distribution electrode (3), intermittent leakage from this dielectric material occurs during the alligator conduction discharge. This often resulted in the inconvenience that a sufficient electrical noise suppression effect could not be obtained due to the occurrence of a discharge.

In view of these conventional drawbacks, the present invention reduces the amount of dielectric material at the discharge end of the distribution electrode, suppresses intermittent copying discharge from this dielectric material, obtains a sufficient noise radio wave suppression effect, and also The present invention provides an inexpensive structure for suppressing noise and radio waves in internal combustion engines, which is suitable for mass production.

Hereinafter, one embodiment of the electrode structure of a power distributor according to the present invention will be described in detail with reference to FIG. 2 and FIGS. 3(a) and 3(b).

The embodiment shown in FIG. 2 is a cutaway front view of a main part corresponding to the conventional example shown in FIG. In each of these figures, the same reference numerals indicate the same or corresponding parts. In this embodiment, according to the distribution electrode (3), the contactor (
A varnish layer (9) containing silicon as a main component is evenly coated on both sides except for the contacting parts of 5), and the thus-treated electron distribution electrode (3) is placed in the same manner as before. It is attached to the electron (1).

Therefore, in the distribution electrode structure according to this embodiment, the varnish layer (9) formed on the distribution electrode (3) is coated evenly except for the contact portion of the contactor (5). For the volume of the varnish layer (9), especially at the discharge end,
In addition, the surface area can be made smaller than before, which reduces intermittent discharge from the silicon dielectric at the discharge end of the electron distribution electrode (3) during inductive discharge, and reduces noise radio waves caused by this discharge. It can suppress the occurrence of. In other words, this is because the absolute amount of dielectric material present at the discharge end decreases, which reduces the amount of accumulated charge that causes intermittent discharge9. Although the discharge starting voltage reduction effect in the discharge gap (9) is somewhat reduced, it does not pose a particular problem.

In the above embodiment, both sides of the electron distribution electrode (3),
In other words, a varnish layer (9) containing silicon as a component is applied to the front side where the contactor (5) comes into contact and the back side thereof.
) has been described above, but the same effect can be obtained by forming a varnish layer (9) on only one of the front and back surfaces.

As detailed above, according to the present invention, as a noise radio wave suppressing structure of a power distribution device, at least one of the surface of the distribution electrode that contacts the contactor and the back surface of the distribution electrode is provided with an area that does not interfere with the contact of the contactor. This is a varnish layer mainly composed of silicon that is evenly deposited on the varnish layer.The average adhesion of this varnish layer makes the presence of silicon dielectric at the discharge end sufficiently small compared to conventional methods. I can do it,
This maintains the effect of reducing the discharge starting voltage in the discharge gap, sufficiently suppresses the generation of noise radio waves due to intermittent discharge from the dielectric, and also because the varnish layer is formed by coating. It has the following characteristics: it has a simple structure, is suitable for mass production, and can be provided at low cost.

[Brief explanation of drawings]

FIG. 1 is a cutaway front view showing the main parts of a power distributor with a noise radio wave suppression structure according to a conventional example, FIG. 2 is a front view of the same according to an embodiment of the present invention, and FIGS. 3(a) and (b). ) is an enlarged plan and side view taken out and showing the same as above. (1)... Electron distribution electrode, (3)... Electron distribution electrode, (
4)... Side terminal electrode, (5)... Contact, (
9)...Varnish layer containing silicon as the main component, (p)
...discharge gap. Agent Masuo Oiwa Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A discharge end of a distribution electrode provided on the distribution electrode is opposed to a side terminal electrode via a discharge gap, and
In a power distributor in which a phenol mainly composed of silicon is provided at the discharge end, silicon is mainly used on at least one of the front and back surfaces of the electrode, excluding the contact portion of the contactor that supplies high voltage to the distribution electrode. A power distribution device for suppressing noise and radio waves of an internal combustion engine, characterized in that a varnish layer as a component is evenly coated.