JPH05315049A - Improvement of negative pole following improvement of point end of positive electrode in spark plug for internal combustion engine - Google Patents

Abstract

PURPOSE:To improve ignition performance of a spark plug for an internal combustion engine by a positive electrode and a negative electrode, corresponding to this positive electrode, in a discharge part improved so that a discharge electrode is constituted in a side as outer as possible from the spark plug in order to expose discharge space in more amount of mixture and similarly in order to easily replace gas in the discharge space, in the spark plug for the internal combustion engine. CONSTITUTION:A spark plug is constituted of a discharge part of a positive electrode (1) protruded at a right angle or in a transverse direction relating to an axial direction of the positive electrode and a discharge part of a negative electrode (2) placed oppositely in the inside (downside when assumed upside for axial directional ignition part) from or equally to the discharge part of this positive electrode, in the spark plug for an internal combustion engine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention improves ignition performance of an ignition plug for an internal combustion engine and prevents misfire.

[0002]

2. Description of the Related Art A conventional spark discharge space of a spark plug for an internal combustion engine is located inside the cathode (the same as or below the discharge part of the cathode if the axial ignition part of the spark plug is above). ing.

[0003]

Therefore, the discharge space in which the sparks of the conventional spark plug for an internal combustion engine fly is in a state of being covered or surrounded by the cathode, which makes it difficult for the sparks to be exposed to the air-fuel mixture. At the same time, the gas in the discharge space is not changed. Further, even if the conventional spark plug has a plurality of anodes, the improvement of the ignition performance can hardly be expected.

[0004]

In order to solve the above drawbacks of the conventional spark plug for an internal combustion engine, in the spark plug of the present invention, the outer side of the discharge part of the cathode (2) (the axial spark part of the spark plug) is used. Is the upper side of the discharge part of the cathode) or at the same position as the discharge space, the discharge part of the anode (1) protruding perpendicularly or laterally to the axial direction of the anode is the discharge part of the cathode. They are placed on the outer side (upper side) or equivalently.

[0005]

Therefore, the discharge space of the spark plug for an internal combustion engine of the present invention is more easily exposed to the air-fuel mixture and the gas is more easily replaced than the conventional spark plug, and the ignition performance of the spark plug having the discharge structure of the present invention is improved. Improve. A discharge electrode having a small cross section is more effective.

Moreover, due to the structural characteristics of the anode and the cathode of the present invention, it is possible to form a plurality of discharge electrodes on one spark plug independently of each other.

[0007]

EXAMPLES Examples will be described with reference to the drawings.
FIG. 1 shows an anode (1) according to claim 1 and a cathode (2) according to claim 2.
It is an example of an ignition plug for an internal combustion engine according to claim 3, which uses a pair of discharge structures constituted by.

2 and 3 show an example of the third embodiment. In the embodiment shown in FIG. 2, the discharge part of the anode (1) protruding laterally of claim 1 is projected in two directions, and the cathode (2) of claim 2 is placed opposite to each other to form two pairs of discharge electrodes. It is the spark plug for internal combustion engines formed. In the embodiment shown in FIG. 3, the discharge part of the anode (1) protruding laterally of claim 1 is projected in three directions, and the cathode (2) of claim 2 is placed opposite to each other to form three pairs of discharge electrodes. It is the spark plug for internal combustion engines formed.

In the embodiment shown in FIG. 4, the spark plug for an internal combustion engine according to claim 4 is composed of three independent anodes. Each of the anodes is the anode (1) of claim 1 and forms a pair of discharge structures with the cathode (2) of claim 2, separated by an insulator (3) and separated by 3 independent layers.
It forms a pair of discharge electrodes.

[0010]

Since the present invention is constructed as described above, it has the following effects.

The discharge space of the discharge portion of the spark plug for an internal combustion engine of the present invention is easily exposed to the air-fuel mixture, and at the same time, the gas in the discharge space is easily replaced. Therefore, the internal combustion engine using the spark plug for an internal combustion engine of the present invention can improve the starting performance, reduce the fuel consumption rate, and further improve the output.

Further, in the spark plug for an internal combustion engine realized according to claim 4, since the plurality of anodes can correspond to different ignition systems, respectively, in addition to the above effects, the output of the internal combustion engine is reduced due to the failure of the ignition system. Stopping can be prevented or reduced with a single spark plug.

[Brief description of drawings]

FIG. 1 is a side view of a discharging portion of an ignition plug for an internal combustion engine.

FIG. 2 is a side view of a discharging portion of an ignition plug for an internal combustion engine.

FIG. 3 is a plan view of a discharging portion of an ignition plug for an internal combustion engine.

FIG. 4 is a plan view of a discharging portion of an internal combustion engine ignition plug.

[Explanation of symbols]

 1 Anode 2 Cathode 3 Insulator

Claims (4)

[Claims] 1. An anode (1) having a discharge portion protruding at right angles or laterally to the axial direction of the anode of an ignition plug for an internal combustion engine. 2. The inside of the spark plug (the axial sparking part of the spark plug is positioned above If so, the cathode (2) opposite to the tip discharge portion of the anode) or equivalently. 3. Anode (1) according to claim 1 for one anode
And a spark plug for an internal combustion engine using one or a plurality of pairs of the discharge structure of the cathode (2) according to claim 2. 4. A plurality of processed anodes (1) independent of one another according to claim 1 separated by an insulator (3),
An ignition plug for an internal combustion engine, wherein a cathode (2) according to claim 2 is placed opposite to each other.