JPS63120862A - Distributor cap for internal combustion engine - Google Patents

Abstract

PURPOSE:To reduce production of vibration of an engine, by a method wherein a rotor head is provided with a stationary electrode, a moving electrode, and a relay electrode for limiting movement of the moving electrode, during a work of preventing the occurrence of overrotation, ignition is effected only by a given cylinder, and during ignition of other cylinders, a given cylinder is caused to perform pilot flame ignition. CONSTITUTION:A rotor head 1 rotated in linkage with an engine is provided with a stationary electrode 2 positioned facing an electrode 8 on the cap side, and a moving electrode 3 movable in centrifugal direction against a spring 5. A high voltage guided to o central terminal 11 on the cap 10 side causes the feed of discharge spark to a relay electrode 4 through the rotor head 1. A relay electrode 4 limiting movement of the moving electrode 3 is protruded from the upper surface of the rotor head 1, and an electrode 9, having the one end part approaching the relay electrode 4 during rotation of the relay electrode 4 and the other end part approaching a part of the electrode 8, is secured to a cover 7. During a work of preventing the occurrence of overrotation, only a given cylinder is caused to effect regular ignition, and during ignition of other cylinder, a given cylinder is caused to perform pilot flame ignition.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a power distribution device for operating an electric ignition for driving an internal combustion engine so as to prevent over-speeding of the engine.

[Conventional technology]

As shown in FIGS. 3 and 4, for example, in a conventional power distributor, an electrode 2 is fixed to one tip of a rotor blade 1, and one surface of the fixed electrode 2 (one surface at the same height) is fixed to one end of a rotor blade 1. At a position opposite to the center of the rotor head 1, a movable electrode 3 is set in a tensioned state via a tension spring 5, and is opposed to the camp side electrode 8.

If the contact gap between the electrodes 2 and 3 on the rotor head and the camp side electrode 8 is too large or too small, not only will the ignition timing change, but the closing angle will also change, causing a significant drop in secondary voltage at high speeds and contact burnout. HC in the exhaust gas of the engine as well as the cause.

Since this causes an increase in NOx, it is necessary to adjust to the correct specified value. Conventionally, when the engine speed increases to a predetermined rotation speed, centrifugal force acts on the movable electrode 3, stretching the tension spring 5 and balancing it on the outer periphery. The movable electrode 3 is located close to the camp side electrode 8, and the secondary voltage is sent through the movable electrode 3, and ignition is not sent to the regular cylinder, so the engine speed can be reduced and overspeed of the engine can be prevented. It has become.

[Problem that the invention seeks to solve]

However, in a power distributor with such a conventional over-rotation prevention mechanism, the movable electrode 3 is pulled out in the outer circumferential direction by centrifugal force, and the movable electrode 3 is moved to a state narrower than the gap between the fixed electrode 2 and the cap-side electrode 8. Because the structure is such that the secondary voltage sent through the center terminal of the camp is
Power is transmitted to electrodes with narrow gaps.

Therefore, if ignition cannot be supplied during the combustion process and the engine overspeeds, all the cylinders will be ignited incorrectly, and the fuel supplied to the combustion chamber will not be combusted, resulting in a sudden drop in engine speed. Ignition occurs at a stroke other than the normal ignition timing (compression upper row state), resulting in ignition of unburned gas, or it is released into the exhaust manifold as unburned gas, and combustion occurs due to the heat of the exhaust manifold, resulting in afterburn. Bank fires occur, and combustion is unstable due to ignition occurring outside the normal ignition stroke, resulting in excessive engine vibration.

The present invention has been made by focusing on such conventional problems, and when the engine overspeeds, one cylinder or multiple cylinders are ignited, that is, only a part of the camp-side electrode is ignited from the movable electrode. By transmitting power, the engine speed decreases only to some cylinders, which allows the engine to operate in a stable state and eliminates bank fires, afterburns, and engine vibrations in the engine overspeed operating range, making the exhaust noise quieter. The purpose is to provide a power distributor with a simple configuration and low cost.

[Means for solving problems]

In the present invention, a high voltage that is thickened at the center terminal on the cap side of a switchboard equipped with a rotor head serving as a power distribution is sent through the rotor head to a side electrode on the camp side by spark discharge, and is sequentially distributed to the passenger cylinders. In the power distributor, the rotor head is provided with a fixed electrode and a movable electrode, a relay electrode is provided for restricting the movement of the movable electrode, and an electrode plate having a large or small gap with the relay electrode is provided on the cap side. It is characterized in that it is arranged close to a part of the electrode, and when the overspeed prevention operation is activated, normal ignition is performed only in the determined cylinder, and when other cylinders are ignited, the determined cylinder is ignited. It is a power distributor in an internal combustion engine.

〔Example〕

To explain the present invention using an example of a six-cylinder engine as shown in FIGS.
and a movable electrode 3 are arranged, and the movable electrode 3 is placed in a tensioned state through a tension spring 5, and both electrodes 2 and 3 are disposed opposite to the camping side electrode 8 of the switchboard, and the cap A high voltage (secondary voltage) led to the center terminal 11 on the side of the rotor 10 is sent to the electrode 8 via the rotor head 1 as a spark discharge.

That is, fixed electrodes 2 and 18 are provided on one side of the upper surface of the rotor head 1.
A movable electrode 3 that can slide is provided on the 0 degree opposite side via a spring 5, and a relay amount ai4 for restricting the movement of the movable electrode 3 is provided protruding from the upper surface of the rotor head.

On the other hand, inside the housing 6 there is an insulating cover 7 fixed to the housing, and when the cap is assembled to the housing, the camping side electrode 8 is partially in contact with the electrode 8 for the NaL 1lh5 cylinder (or a very small amount of air Two arcuate electrode plates 9 each having a gap (with a gap) are fixed to the cover 7. In this case, two arc-shaped electrode plates 9
However, the shape differs depending on the cylinder in which the fire is carried out and the cylinder in which the fire is carried out). Then, the upper surface or side surface of this electrode plate 9 is connected to a certain large or small gap, that is, 1lhl-5.
-3-6-2-4, the relay electrode 4 rotates while having a size gap in which the gear 5 is large and the magnetic 3.6 has a small gear, and the gear 2 is large and the gear 1.4 is small. It is configured to do this.

The fixed electrode 2 fixed to the rotor head 1 is disposed above and below the movable electrode 3, which is movable by centrifugal force, at different heights, and the tip of the electrode that distributes power to the cap-side electrode 8 is arranged above and below the movable electrode 3, which is movable by centrifugal force. The number of cap-side electrodes 8 for receiving electricity is arranged for all the cylinders, that is, the electrodes 8 have the same depth and installation position.

The operation of a 6-cylinder engine will be explained by assigning cylinder numbers to the electrode 8 installed at camp 10 (see Figure 2).
In other words, taking as an example the case where the ignition order of the power distribution is ■-■-■-■-■-■ in a 6-cylinder engine, cylinders numbered ■-■-Φ are ignited. When the rotation speed of the rotor rad 1 reaches a certain set rotation speed (A rotation of the engine rotation), a centrifugal force acts on the movable electrode 3, the spring 5 is stretched, and the movable electrode 3 slides in the circumferential direction. In contact with the relay electrode 4.

Then, when the relay electrode 4 faces the arcuate electrode plate 9 with a small gear (the gap is set to be small when the cylinders numbered ■ and The ignition spark for the number cylinder is 0, and the spark is discarded into the cylinder), but the ignition spark is 0.
Since the gap between the relay electrode 4 and the arc-shaped electrode plate 9 is set to be large when the number cylinder is normally ignited, the normal ignition is performed in the number 0 cylinder even when overspeed is prevented.

The same applies to ■-■-〇, and the normal ignition is only in the 0th cylinder, and the ignition of the ■ and ■ cylinders is discarded to the 0th cylinder.

That is, Nn2. No. 4. The ignition of the 1lhl cylinder is limited to the 12th cylinder, and the no. 5. Ih3,1
Prevents the ignition of the LK6 cylinder and causes only the 5th cylinder to ignite.

In other words, two of the six cylinders (m2.Ih5) are operated with regular ignition, and the other No. 4. When the ml cylinder is ignited, a fire is placed in the space 2, and when the Na 3 and Nu 6 cylinders are ignited, the fire is set in the space 5.

In the above, only the cylinders No. 1 and 2 are used as the ignition electrodes, but it goes without saying that the number of cylinders and the cylinders can be selected as necessary based on the relationship between the output characteristics of the engine and the running performance of the vehicle.

〔Effect of the invention〕

The present invention provides a fixed electrode provided in a rotor head, a movable electrode that moves by centrifugal force, and a middle electrode that restricts the movement of the movable electrode, and also provides an electrode plate having a large or small gap with the relay electrode. Power is distributed to the specified cylinder by placing it close to a part of the side electrode, and igniting only the specified cylinder when overspeed prevention is activated, and igniting the specified cylinder when other cylinders are ignited. It is possible to reduce engine vibration in the overspeed prevention mechanism activation range when overspeeding, and there is no occurrence of bank fire or afterburn, and the movable electrode comes into contact with the relay electrode, which prevents excessive stress from being generated in the spring during overspeed. Not only does this improve reliability, but even if the spring of the movable electrode is damaged, two-cylinder operation is possible, making it easy and safe to maintain drivability.
Moreover, since the fire is disposed of without being grounded to the shaft portion of the power distributor, there is no risk of electrical corrosion and the durability can be greatly improved. The effect of ensuring drivability during operation can be obtained.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of the main part, Figure 2 is a plan view taken along line ■-■ in Figure 1, Figure 3 is a longitudinal sectional view of the conventional example, and Figure 4 is Figure 3 ■n.
It is a top view of a line. ■...Rotor head, 2...Fixed electrode, 3...Movable electrode, 4...Relay electrode, 5...Spring, 6...
... Housing, 7... Insulating cover, 8... Camping side electrode, 9... Arc-shaped electrode plate, 10... Cap, 11... Center terminal. Patent Applicant Nissan Koki Co., Ltd. Representative Patent Attorney Minoru Yakushi Representative Patent Attorney Yori 1) Takatsugu Department Representative Patent Attorney Takashi
Masayuki Thu Figure 4 Secondary voltage ↓ Procedural amendment dated 26th lθ, 1985 Kunio Ogawa, Commissioner of the Patent Office 1, Indication of the case 1986 Patent Application No. 192
No. 861 2, Title of the invention Power distribution device in internal combustion engine 3
, Relationship with the case of the person making the amendment Name of patent applicant: Nissan Koki Co., Ltd. 4, Agent 5, Date of amendment order: Initiator 6, Number of inventions increased by amendment Patent Application 1986-192861 Amendment Specification 1. Title of the invention Power distribution device for an internal combustion engine 2. Claims (1) A high voltage led to a center terminal on the cap side of a power distribution board equipped with a rotor head serving as a power distribution device passes through the rotor head and causes a spark discharge. In a power distribution device that is sent to a side electrode on the cap side and sequentially distributed to each cylinder, the rotor head is provided with a fixed electrode and a movable electrode by centrifugal force, and a relay electrode is provided to limit the movement of the movable electrode, An electrode plate, one end of which is close to the relay electrode during rotation of the relay electrode and the other end of which is close to a part of the cap-side electrode, is provided in the fixed part of the power distributor, and when over-rotation prevention is activated, a fixed cylinder 1. A power distribution device for an internal combustion engine, characterized in that it is configured to perform regular ignition only in one cylinder, and to ignite a predetermined cylinder in a predetermined cylinder when other cylinders are ignited. (2) The movable electrode is connected to the fixed electrode by a spring, and is movable by centrifugal force that overcomes the spring as the rotor head rotates, and comes into contact with the relay electrode when the engine overspeeds. A power distributor according to claim 1. (3) The electrode plate is an arc-shaped electrode plate, and a plurality of electrode plates are provided on an insulating cover fixed to a housing to form two large and small gaps. Distributor as described in section. (4) The arc-shaped electrode plate is used for 6 cylinders, and part of it touches or is close to the cap side electrodes of the 2nd and 5th cylinders with a very small gap, and the Flh2. No. Na4 after normal ignition combustion in 5 cylinders
, 1, 3, and 6. The power distributor according to claim 3, wherein the ignition for cylinders 1, 3, and 6 is discarded. 3. DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application] The present invention relates to a power distribution device that operates electrical ignition between internal combustion engines to drive the engine so as to prevent over-speeding of the engine. [Prior Art] As shown in FIGS. 3 and 4, for example, as shown in FIGS. 3 and 4, a conventional power distributor has an electrode 2 fixed to one end of a rotor head 1. At a position opposite to the center of the rotor head 1, a movable electrode 3 is set in a tensioned state via a tension spring 5, and is opposed to the cap-side electrode 8.Then, the engine rotates. When the speed reaches a predetermined rotational speed, centrifugal force acts on the movable electrode 3 and stretches the tension spring 5.
It is located in a balanced manner on the outer periphery and is close to the cap side type pi 8, and the secondary voltage is sent through the movable electrode 3 and does not send ignition to the regular cylinder, so it is possible to reduce the engine speed and prevent the engine from overspeeding. It can be prevented. [Problems to be Solved by the Invention] However, in a power distributor with such a conventional over-rotation prevention mechanism, the movable electrode 3 is pulled out in the outer circumferential direction by centrifugal force, and the fixed electrode 2 and the cap side electrode Since it has a structure that can be moved to a state narrower than the gap of 8, the secondary voltage sent through the center terminal of the cap is
If the power is transmitted to the electrodes in the narrow gap and the engine overspeeds, the cylinders that are in the normal combustion and explosion process will not be able to ignite, resulting in ignition errors in all cylinders, and the fuel supplied to the combustion chamber will not burn and will suddenly explode. Not only will the engine speed decrease, but the ignition will occur during a stroke other than the normal ignition timing (original ignition timing) from normal ignition to exhaust all cylinders or the normal ignition timing (in the original state of compression), or the unburned gas may ignite as unburned gas in the exhaust manifold. The heat from the exhaust manifold causes combustion, resulting in afterburn and backfire.Furthermore, it ignites at a time other than the normal ignition stroke, making combustion unstable and causing excessive engine vibration. The present invention has been made by focusing on such conventional problems, and it is possible to ignite a preliminary flame in one or more cylinders when the engine overspeeds, in other words, to ignite only some of the cap-side electrodes from the movable electrodes. By transmitting power, the engine speed decreases only in some cylinders, which allows the engine to operate in a stable state and eliminates backfire, afterburn, and engine vibration in the engine over-speed operating range, resulting in quieter exhaust noise. The purpose is to provide a power distribution device in a pre-assembled vehicle at a low cost. Means for Solving Problem C] The present invention provides that a high voltage led to the central terminal on the cap side of a power distribution board equipped with a rotor head serving as a power distribution source is transmitted through the rotor head to the side of the camp side by spark discharge. In a power distributor that is sent to the electrodes and sequentially distributed to each cylinder, the rotor head is equipped with a fixed electrode and a movable electrode by centrifugal force, and a relay electrode is provided to restrict the movement of the movable electrode, and the rotation of the relay electrode is An electrode plate with one end close to the relay electrode and the other end close to a part of the cap side electrode is disposed in the fixed part of the power distributor, and when overspeed prevention is activated, regular ignition is performed only in the determined cylinder. This is a power distribution device for an internal combustion engine, characterized in that it is configured to ignite a predetermined cylinder in a predetermined cylinder when ignition occurs in other cylinders. [Example] To explain the present invention using an example of a six-cylinder engine shown in FIGS.
The movable electrode 3 is placed in a tensioned state via a tension spring 5, and the electrode 2 is disposed opposite to the cap-side electrode 8 of the switchboard, and the cap l. The high voltage (secondary voltage) led to the central terminal 11 on the side is sent via the rotor head l to the electrode 8 in the form of a spark discharge. That is, on one side of the upper surface of the rotor head 1 there are fixed electrodes 2 and 180.
A movable electrode 3 that can slide is provided on the opposite side via a spring 5, and a relay electrode 4 that restricts the movement of the movable electrode 3 is provided to protrude from the upper surface of the rotor head. On the other hand, there is an insulating cover 7 fixed to the housing inside the housing 6, and when the cap is assembled to the housing, the magnetic 2. The cover 7 includes two deformed arc-shaped electrode plates 9 whose one end is in contact with the electrode 8 for the 5th cylinder (or has a very slight air gap).
Fixed. The gap between the relay electrode 4 and the adjacent portion of the electrode plate 9 is smaller than the gap between the electrode 8 and the fixed electrode 2. (In this case, the shape of the arc-shaped electrode plate 9 varies depending on the number of cylinders and the firing order of the cylinders.)
The gap between this electrode plate 9 and the relay electrode 4 is the gap between the fixed electrode 2
When rotating in the order 8111-5-3-6-2-4, corner 5 has a large gear, and Arashi 3°6 has a small gear.
2 has a large gear, and Na4°l has a small gear, so that the relay electrode 4 rotates while having a size gap. The fixed electrode 2 fixed to the rotor head 1 is disposed above and below the movable electrode 3, which is movable by centrifugal force, at different heights, and the tip of the electrode that distributes power to the cap-side electrode 8 is arranged above and below the movable electrode 3, which is movable by centrifugal force. The cap-side electrodes 8 that receive power are arranged in the number of all the cylinder bones, that is, the electrodes 8 are at the same height and installation position. The operation of a 6-cylinder engine will be explained by assigning cylinder numbers to the electrode 8 provided on the cap IO (see Figure 2).
In other words, the power distribution order is ■-■-■-■-〇-■ ignition 11
Taking as an example the case where all cylinders are in the ■-■-Φ cylinder of a 6-cylinder engine with a 1 order, when a predetermined overspeed is reached, the rotation speed of the rotor head 1 (engine rotation noise) is as follows.
When a certain set rotational speed is reached, a centrifugal force acts on the movable electrode 3, the spring 5 is stretched, and the movable electrode 3 slides in the circumferential direction and comes into contact with the relay electrode 4. Then, when the relay electrode 4 faces the arcuate electrode plate 9 with a small gear (the gap is set to be small when the cylinders numbered ■ and The ignition spark for the No. 0 cylinder is discarded into the No. 0 cylinder), but when the No. 0 cylinder is normally ignited, the gap between the relay electrode 4 and the arc-shaped electrode plate 9 is set to be large, so the No. Normal ignition occurs even when rotation is prevented. The same applies to ■-■-■, and normal ignition occurs only in the 0th cylinder, and the ignition of the ■ and ■ cylinders is discarded to the 0th cylinder. That is, Na2. 4. The ignition of the flhl cylinder is limited to only the second cylinder, and the no. 5,1lh3. N
ignite the 6th cylinder only in the affected 5th cylinder. In other words, two of the six cylinders (No. 2. Th5) are operated with regular ignition, and the other cylinders are operated with regular ignition. 4. Floor 2 when Nnl cylinder ignites
Throw away the fire and No. 3. No. When the 6th cylinder is ignited, a fire will be lit in the 5th room. In the above, only the cylinders numbered ■ and ■ are used as the ignition electrodes, but it goes without saying that the number of cylinders and the cylinders can be selected as necessary depending on the relationship between the output characteristics of the engine and the running performance of the vehicle. The power distribution order in the engine is ■−■−■
-■-■-■ In the case of 0.0 cylinder only, the large spark point electrode is discarded, or the order of power distribution is ■-■-■- in a sub-type 6-cylinder engine.
When ■−■−■, only the 0.0th cylinder is used as the ignition electrode, or when the power distribution order is ■−■−■−■−■−■, only the ■ and ■ cylinders are used as the ignition electrode. [Effects of the Invention] The present invention provides a fixed electrode provided in a rotor head, a movable electrode that moves by centrifugal force, and a relay electrode that restricts the movement of the movable electrode. An electrode plate with a large or small gap formed between the cap side electrode is placed close to a part of the cap side electrode, and when overspeed prevention is activated, ignition is performed only in the designated cylinder, and when other cylinders are ignited, the determined cylinder is ignited. By igniting a dead flame, it is possible to reduce engine vibration in the overspeed prevention mechanism activation range when power is distributed to a specific cylinder, and there is no backfire or afterburn, and the movable electrode is a relay electrode. Not only does this contact improve reliability by preventing excessive stress from being generated in the spring during overspeeding, but it also makes it easy to maintain drivability by allowing two-cylinder operation even if the movable electrode spring is damaged. is safe and
Moreover, since the fire is disposed of without being grounded to the shaft portion of the power distributor, there is no risk of electrical corrosion and the durability can be greatly improved. The effect of ensuring drivability during operation can be obtained. 4. Brief explanation of the drawings Figure 1 is a vertical sectional view of the main parts, Figure 2 is a plan view taken along the line I-■ in Figure 1, Figure 3 is a vertical sectional view of the conventional example, and Figure 4 is a vertical sectional view of the main part. Figure ■-
■It is a plan view of the line. DESCRIPTION OF SYMBOLS 1... Rotor head, 2... Fixed electrode, 3... Movable electrode, 4... Relay electrode, 5... Spring, 6...
... Housing, 7... Insulating cover, 8... Cap side electrode, 9... Arc-shaped electrode plate, 10... Cap, 11... Center terminal. Patent Applicant Nissan Koki Co., Ltd. Representative Patent Attorney Minoru Yakushi Representative Patent Attorney Yori 1) Takashi Department ゛Representative Patent Attorney Tadashi Takagi 2/2 Voltage ↓ Procedural Correction Building 1, Case Display 1986 Patent Application No. 192
No. 861 2, Title of the invention Power distribution device in internal combustion engine 3
, Relationship with the case of the person making the amendment Name of the patent applicant: Nissan Koki Co., Ltd. 4, Agent 5, Date of amendment order: Initiator 6, Number of inventions increased by the amendment Japanese Patent Application 1986-192861 8, Contents of the amendment In the present specification, the following addition is made after (1) page 9, line 13: “For example, in an in-line 6-cylinder engine, the power distribution 1 injection order is ■−■−■
-■-■-■ In the case of ■ and ■ cylinders only, the spark point large electrode is discarded, or the power distribution order is ■-■-■- in a V-side 6-cylinder engine.
■When ■−■−■■. Is it possible to use only the 0th cylinder as a discarded ignition electrode?

Claims (4)

[Claims] (1) A high voltage led to the central terminal on the cap side of a power distribution board equipped with a rotor head serving as a power distribution is sent through the rotor head to the side electrodes on the cap side by spark discharge, and is sequentially distributed to each cylinder. In an electric appliance, a fixed electrode and a movable electrode are provided on the rotor head, a relay electrode is provided for restricting the movement of the movable electrode, and an electrode plate with a gap between the relay electrode and the relay electrode is formed on the cap side electrode. An internal combustion engine characterized in that the internal combustion engine is arranged in close proximity to one another, and is configured so that when an overspeed prevention operation is activated, normal ignition is performed only in a determined cylinder, and when other cylinders are ignited, a predetermined cylinder is ignited. power distribution device. (2) The movable electrode is connected to the fixed electrode by a spring, and is movable by centrifugal force that overcomes the spring as the rotor head rotates, and comes into contact with the relay electrode when the engine overspeeds. A power distributor according to claim 1. (3) The electrode plate for forming the gap is an arc-shaped electrode plate, and a plurality of electrode plates are provided on an insulating cover fixed to the housing to form two stages of large and small gaps. The power distributor described in paragraph 2 or paragraph 2. (4) The arc-shaped electrode plate is used in a 6-cylinder engine, and the cap side electrode is No. 2 cylinders and no. The No. 5 cylinder is partially in contact with the 5 cylinder or is close to the 5 cylinder with a very small gap. 2.No. After normal ignition combustion with 5 cylinders, No. 4. The power distributor according to claim 3, wherein the ignition for 4, 1, 3, and 6 cylinders is discarded.