JPH0315663A - Distributor for internal combustion engine - Google Patents

Abstract

PURPOSE:To prevent the derivation of a noise wave due to electric discharge by forming a rotor electrode with a specific material containing dielectric powder in a distributor for distributing power via discharge generated in a discharge gap between the rotor electrode and plurality of sideward electrodes. CONSTITUTION:A rotor 2 fixed to a rotary shaft 1 rotating interlocked with the crankshaft of an internal combustion engine is fitted with a rotor electrode 3. Also, a plurality of sideward electrodes 4 are provided along the rotation locus of the rotor electrode 3 via a discharge gap (g). In the aforesaid distributor, the rotor electrode 3 is formed with a material mixed with dielectric powder 9 and manufactured through a powder metallurgical process. In addition, a noise wave appearing due to electric discharge generated in a discharge gap (g) between the rotor electrode 3 and the sideward electrodes 4 is suppressed using the dielectric powder 9 in both peak detection and quasi-peak detection. Also, the electric discharge itself is stabilized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power distribution device for an internal combustion engine, and more particularly to a power distribution device for an internal combustion engine that takes measures to suppress noise radio waves caused by discharge sparks accompanying power distribution operation. It is. [Prior Art] Fig. 2 shows a conventional power distribution device for an internal combustion engine. An electrode (3) is provided, and a discharge gap (
A plurality of lateral electrodes (4) are arranged via g). A contact (6) connected to the ignition coil by a conducting wire (5) is pressed onto the upper surface of the distribution electrode (3).

Due to the above-mentioned configuration, the four-sided electrode (4) placed close to the rotation locus of the electron distribution electrode (3) has a distribution power f! as the electron distribution electrode (2) rotates. (3), a high voltage is applied by discharge through the discharge gap (g),
Electricity is sequentially distributed to each spark plug by the discharge generated in the discharge gap (g). At this time, the electron distribution electrode (3
Noise radio waves are generated by the spark discharge that occurs in the discharge gap (g) between > and the side electrode i (4). These noise radio waves cause radio wave interference to radio broadcasts, TV broadcasts, various wireless communication devices, and electronic devices, worsening the S/N ratio. A conventional means for suppressing the generation of such noise radio waves is disclosed in Japanese Patent Publication No. 51-38853.

As shown in FIG. 3, a high-resistance material layer (7
). With the above configuration, it is possible to reduce the electric field strength of the noise radio waves generated during the discharge between the distribution power i (3) and the side electrode (4). [Problems to be Solved by the Invention] The conventional power distributor for internal combustion engines as described above has a high-resistance material layer on the power distribution electrode. ), a considerable effect can be obtained, but quasi-peak detection (CISP)
In the case of R), sufficient effect was not seen, and therefore,
In particular, there was the problem that interference caused by radio noise remained unresolved with FM radio. In addition, there was also rr:Iiii in which the presence of an insulating layer on the front surface of the electron distribution electrode increased radio noise and caused unstable discharge.

This invention was made in order to solve the above problems, and provides a power distribution device for internal combustion engines that has a remarkable effect of suppressing noise radio waves even in the measurement results using quasi-peak detection, and that can obtain stable discharge in the discharge gap. The purpose is to obtain. [Means for Solving the Problems] A power distribution device for an internal combustion engine according to the present invention includes a distribution t-pole made of a material made by a powder metallurgy method by mixing conductive metal powder with dielectric powder. .

[Operations] In this invention, the presence of dielectric powder suppresses the generation of noise radio waves associated with discharge. [Example] Figure 1 shows an example of the present invention, in which the electron distribution electrode (3)
is made of a material made by a powder metallurgy method by mixing the conductive powder material (8) with the Y4 electric powder (9).

As the conductive powder material (8), Cu. Ni etc. are preferable. In addition, as the dielectric powder (9), SiC, ^1
203, Si, etc. are preferable.

The rest of the configuration is the same as shown in Figure 2. With the above configuration, the dielectric powder (9) suppresses the generation of noise radio waves, and has the effect of suppressing noise radio waves in both the measurement of noise radio waves by peak detection (SAF) and the measurement of noise radio waves by quasi-peak detection (CISPR). We were able to confirm that this was significant. Furthermore, the above-mentioned effects could be confirmed using data in measurements of noise electric field strength at each frequency and auditory judgment.

Furthermore, since the front surface of the distribution electrode (3) was conductive, the discharge was stable and radio noise was minimized.

[Effects of the Invention] As described above, according to the present invention, the distribution electrode is formed of a material made by a powder metallurgy method by mixing conductive metal powder with dielectric powder. Both peak detection measurement methods show the effect of suppressing noise radio waves and provide stable discharge.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the main parts of the present invention, Fig. 2 is a partially sectional side view of a conventional power distribution device for an internal combustion engine, and Fig. 3 is a side sectional view of the main parts. (1)... Rotating shaft, (2)... Electron distribution, (3)...
- Distribution electrode, (4)... Lateral electrode, (8)... Conductive metal powder/powder, (9)... Dielectric powder. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A distribution electrode provided on a distribution electrode fixed to a rotating shaft that rotates in synchronization with the rotation of the crankshaft, and a plurality of electrodes arranged on the rotation locus of this distribution electrode via a discharge gap. A power distribution device for an internal combustion engine, characterized in that the distribution electrode is made of a material made by a powder metallurgy method by mixing conductive metal powder with dielectric powder. Power distributor for internal combustion engines.