JP2924318B2 - Ignition device for internal combustion engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition device for an internal combustion engine having an ignition coil for each cylinder of the internal combustion engine.

[0002]

2. Description of the Related Art Hitherto, in an ignition device for an internal combustion engine, an ignition device has been developed in which ignition coils for the number of cylinders are mounted above the ignition plug so as to be directly connected to the ignition plug. For the purpose of improving the mountability, improving the engine performance, and improving the appearance of the engine, products integrating ignition coils, power distribution members and decorative plates for the number of cylinders have been put into practical use. A cylindrical protective sleeve is arranged in each plug hole of the cylinder head to form an external casing integrally.In each protective sleeve, each ignition coil housed in the coil case is inserted, and each ignition coil is mounted on a printed board or Some are connected to the connector via the lead wire. (For example, refer to Japanese Patent Publication No. 60-1961961)

However, in such a conventional ignition device for an internal combustion engine, since the electrical connection between each ignition coil and the connector needs to be connected by a printed board or lead wires, the number of parts is large. In other words, there was a problem that the number of assembling steps also increased. Further, in the conventional ignition device for an internal combustion engine in which the ignition coil is particularly removable, the fixing method and the connection method of the primary wiring such as the power supply and the ignition timing control signal are devised to improve the assembling property. It is also required to be improved.

In the above-mentioned Japanese Patent Application Publication No. Sho 60-501961, a resin finger-shaped outer case is required to fix a plurality of ignition coils, and the fact is that bolting is required. Inevitably, a large number of assembly steps are required. Furthermore, the method of bolting the ignition coil requires a plurality of bolts, which further increases the number of assembly steps.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the prior art and to compare the simple structure by fixing the ignition coil and electrically connecting the ignition coil and the connector simultaneously. An object of the present invention is to provide a reliable and highly reliable ignition device for an internal combustion engine, which can reduce the number of assembling steps with an extremely small number of parts and can easily perform assembling work.

[0006]

The present invention employs the following technical configuration to achieve the above object. That is, an ignition device for supplying a high voltage for ignition to each ignition plug arranged in each cylinder of a multi-cylinder internal combustion engine, wherein an ignition coil is fitted and supported at a position facing the ignition plug of each cylinder. A power distribution member having an opening and having a plurality of conductive wiring members disposed thereon, and a fitting with the opening of the power distribution member and protruding from the power distribution member toward each of the ignition plugs. And an ignition coil having an ignition coil winding portion for driving each ignition plug therein, wherein the ignition coil is fitted near the end of the ignition coil fitted with the power distribution member. An electrode portion connected to a winding end of an ignition coil winding portion incorporated in the ignition coil is provided, and one end of the conductive wiring member disposed on the power distribution member is connected to the electrode portion. A terminal near the opening of the distribution member Constitute a,
The other end of the conductive wiring member is connected to a lead of a connector provided in a part of the power distribution member, and the ignition coil has a mechanism capable of rotating with respect to the power distribution member. The electrode portion of the ignition coil and the terminal portion of the conductive wiring member formed near the opening of the power distribution member are electrically connected to each other within a rotation range of the ignition coil. This is an ignition device for an internal combustion engine configured to maintain the connection.

[0007]

In the ignition device for an internal combustion engine according to the present invention,
An electrode portion connected to the end of the ignition coil winding portion provided in the ignition coil is provided at the end of the ignition coil, and one end of a conductive wiring member embedded in the power distribution member is provided. The electrode is formed so as to be exposed on the surface of the power distribution member, and the electrode and the end of the conductive wiring member of the power distribution member are in electrical contact with each other in a slidable state. Even when the ignition coil is rotationally fitted and fixed to the bracket portion, the fixing position does not require strict adjustment, and therefore, the operation of fixing the ignition coil can be easily performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of an ignition device for an internal combustion engine according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial cross-sectional front view showing a configuration of a main part of a first embodiment of an ignition device for an internal combustion engine according to the present invention. In the figure, 10 is a female screw portion 20
A bracket portion made of a metal material having rigidity, 30 is a power distribution member made of a synthetic resin material having electrical insulation, and a wiring member made of a material having excellent conductivity is embedded in the power distribution member 30. One end is exposed on the surface of the power distribution member 30 as terminals 40 and 50.

Reference numeral 60 denotes a screw for fixing the power distribution member 30;
Is an ignition coil. Reference numeral 80 denotes a coil case made of a synthetic resin material having excellent electrical insulation properties, 90 denotes an ignition coil winding part, and 90a and 90b denote lead wires from the ignition coil winding part 90. 100 is the bracket part 10
A metal material portion 120 having a male screw portion 110 corresponding to the female screw portion 20 provided on the substrate and electrode portions 130 and 140 made of a material having excellent conductivity are integrally formed of a synthetic resin material 141 having electrical insulation. Further, it is an end member of the ignition coil 70.

Here, one end 1 of the electrode portions 130 and 140
30a and 140a have a leaf spring shape, and the other ends 130b and 140b have an L-shape and are connected to the lead wires 90a and 90b, respectively. The bracket 10 and the power distribution member 30 are provided with openings O and P into which the ignition coil 70 is fitted. FIG. 2 is a partial sectional front view showing the ignition coil 70 of the first embodiment. In the drawing, reference numeral 90c denotes a grounding lead (lead) copper wire from the ignition coil winding portion 90, and 120a denotes a metal material portion 120 provided on the end member 100 of the ignition coil 70.
The grounding lead wire 90c from the ignition coil winding portion 90 is connected to the small window portion 120a.

FIG. 3 shows a bracket 10 of the first embodiment.
FIG. 4 is a partial cross-sectional front view showing a state where the power distribution member 30 and the ignition coil 70 are assembled. FIG. 4 is a partial plan view showing the power distribution member 30 of FIG. 1 of the first embodiment in the direction of arrow C. FIG. 5 is a view of the end member 100 of FIG. 2 of the first embodiment in the direction of arrow D. FIG. 6 is an end member 1 of FIG. 2 of the first embodiment.
00 is a partial cross-sectional front view showing 00 in the direction of arrow E. FIG. 7 and 8 are general views showing an example in which the first embodiment of the ignition device according to the present invention is applied to a four-cylinder engine.

FIG. 7 shows an ignition coil 70,
FIG. 3 is a plan view from which a cover 160 and a spark plug 220 are removed. In the figure, 10a is a mounting hole provided in the bracket portion 10, 40a is a wiring member made of a highly conductive material connected to the terminal 40, and 50a to 50d are wirings made of a highly conductive material connected to the terminal 50. Reference numeral 170 denotes a connector provided at the end of the power distribution member 30.

FIG. 8 is a partial sectional front view showing a state where the ignition device of the present invention is mounted on a cylinder head or a cylinder block of an engine. In the figure, 70a is the ignition coil 70.
160 is a cover made of a rigid metal material, 160a is a cylindrical projection provided on the cover 160, 180 is an elastic member, and 190 is a screw for fixing the bracket portion 10 and the cover 160. . 200 is a simulated sectioned cylinder head or head cover,
Reference numeral 210 denotes a plug hole simulated in the same manner, and reference numeral 220 denotes a spark plug.

FIG. 9 is a partial sectional front view showing a main part of a second embodiment of the ignition device according to the present invention. In the figure, reference numeral 300 denotes a power distribution member made of a synthetic resin material having rigidity and electrical insulation, and a terminal 31 made of a material having excellent conductivity.
0 and 320 are fixed by heat caulking or the like.

The terminals 310a and 320a are terminals 310.
And 320 are small holes. 330 is an ignition coil, 340 is a coil case made of a synthetic resin material having excellent electrical insulation, 350 and 360 are electrode portions made of a material having excellent conductivity, and 370 is a coil spring made of a metal material. Here, the electrode portions 350 and 360 and the coil spring 370 are integrally formed in the coil case 340 by a thermosetting resin 380 having excellent electrical insulation. 350a and 360a are electrode portions 350 and 360
The protrusion 390 provided at the tip of the cover is a cover made of a rigid metal material. 10 (A) to 10
(C) shows an assembling procedure of the ignition coil 330 of the second embodiment. FIG. 10A is a partial cross-sectional front view showing a state before the ignition coil 330 is inserted into the gap L between the terminal 320 and the cover 390, and 370a is a tip of the coil spring 370. FIG.
FIG. 3A is a partial plan view showing a state in which the cover 390 is removed and viewed from the direction of the arrow J, in which 300a and 300b are stopper portions.

FIG. 10C shows the ignition coil 330 shown in FIG.
FIG. 3B is a partial plan view showing a state rotated in the K direction shown in FIG. 3B, where 310 b is a wiring member made of a highly conductive material connected to the terminal 310, and 320 b is a conductive member connected to the terminal 320. It is a wiring member made of a material having excellent properties. FIG. 11 is a partial cross-sectional front view showing a state where the ignition device according to the second embodiment is applied to a cylinder head or a head cover of an engine as an example applied to a four-cylinder engine. In the figure, 400 is a bush made of a metal material, 410 is a bolt for fixing the power distribution member 300 and the cover 390, 420 is a mounting hole provided in the cover 390, 430 is a cylinder head 440 in which the cover 390 is simulated in section. It is a bolt to be fixed to. 45
Reference numeral 0 denotes a simulated plug hole, 220 denotes a spark plug, and 330a denotes a spark plug holding and engaging portion of the ignition coil 330.

FIG. 1 shows a structure of an ignition coil 70 and a procedure for assembling each component as a first embodiment of the present invention. A female thread 20 is provided on the bracket 10 made of a rigid metal material such as aluminum. A wiring member serving as a connecting means made of a material having excellent conductivity such as a copper-based alloy is embedded in a power distribution member 30 made of a synthetic resin molded product having electrical insulation, and one end thereof is connected to terminals 40 and 50. As is exposed on its surface. FIG. 7 shows a state in which the wiring member 40a connected to the terminal 40 and the wiring members 50a, 50b, 50c, and 50d connected to the terminal 50 are buried. A battery power supply and an ignition signal are supplied to a connector 170 integrally formed at an end of the power distribution member 30.
The wiring members 40a, 50a to 50d, which are inputted to the lead portions provided in the
The light is transmitted to the ignition coil winding section 90 via the reference numerals 0 and 50.
One of these terminals 40 is for battery power, 5
0 is a terminal for the ignition signal.

In the example shown in FIG. 7, the battery power supply terminal 40 is integrated with the wiring member 40a,
It is used as a common power supply for the ignition coil winding portions 90 of the four ignition coils 70. The power distribution member 30 in which the wiring members 40a and 50a to 50d connected to these terminals are embedded is fixed to the bracket portion 10 by screws 60 shown in FIG.
To be fixed. As shown in FIG. 2, the ignition coil 70 is roughly divided into a cylindrical coil case 80, a primary winding and a secondary winding (both not shown) made of a synthetic resin molded product having excellent electrical insulation properties. The ignition coil winding part 90 contained in the coil case 80, and the ends of the ignition coil winding part 90 are connected to the lead wires 90a and 90b. It consists of three elements of the end member 100 of the ignition coil 70 having the electrode parts 130 and 140 for supplying signals.

Here, the structure of the end member 100 will be described. As shown in FIG. 1, a metal material portion 120 having a male screw portion 110 corresponding to the female screw portion 20 of the bracket portion 10 is provided. Electrode part 130 for transmitting battery power, electrode part 140 for transmitting an ignition signal
And a member integrally formed of a synthetic resin material 141 having electrical insulation properties is disposed integrally with the metal material portion 120. Here, the electrode portions 130 and 140 are made of a material having excellent conductivity such as a copper-based alloy, and one ends 130a and 140a of the respective electrode portions have a leaf spring shape.

The other ends 130 of the electrode portions 130 and 140
b and 140b are bent substantially in an L-shape, and the other end 130b of the electrode section 130 is provided with a copper wire 90a for battery power drawn from the ignition coil winding section 90 and the other end 140b of the electrode section 140. Is similarly connected to a copper wire 90b for an ignition signal. After connecting each copper wire, a part of the ignition coil winding part 90 and a part of the electrode parts 130 and 140 are housed in the coil case 80, and a thermosetting resin such as an epoxy resin which is excellent in electrical insulation from the direction A in the drawing. (Not shown) is injected and cast almost to the B side, and is completely fixed and held in the coil case 80.

The ignition coil 70 is attached to the internal thread 20 provided on the bracket 10 by the end member 10 of the ignition coil 70.
The male screw portion 110 provided on the metal material portion 120 is fixed and held by the bracket portion 10 by being rotated and inserted, and at the same time, the wiring members 40 a and 50 a to 50 d embedded in the power distribution member 30. And electrical connections between the terminals 40 and 50, which are one ends of the electrodes, and the ends 130a and 140a of the electrode members 130 and 140 provided on the end member 100 of the ignition coil 70, each having a leaf spring shape.

FIG. 3 shows a state in which the ignition coil 70 is assembled. Here, FIG. 4 shows a state in which the terminals 40 and 50 which are one ends of the wiring members 40a and 50a to 50d embedded in the power distribution member 30 shown in FIG. 1 are viewed from the direction of arrow C in the figure. By forming the terminals 40 and 50 into concentric annular shapes as shown in the figure, when the ignition coil 70 rotates and is fixed to the bracket portion 10, the electric power between the terminals is independent of the rotation angle. Connection is possible.

FIG. 5 is a plan view of the end member 100 of the ignition coil 70 as viewed from the direction of arrow D in FIG. 2, and is made of a thermosetting resin (not shown) such as an epoxy resin which has excellent electrical insulation. By forming the inlet 150 into a hexagonal shape, it is possible to insert or remove the ignition coil 70 using a standard tool such as a hexagon wrench (not shown) without using a special tool. . In the present embodiment, the injection port 150 is described as having a hexagonal shape, but any shape may be used as long as a special tool is not required.

When it is necessary to ground the ignition coil winding section 90 of the ignition coil 70, the ignition coil 70 shown in FIG.
By connecting the grounding copper wire 90c drawn from the ignition coil winding part 90 to the small window 120a of the metal material part 120 provided on the end member 100 of the metal member part 1,
The engine body (not shown) from the male screw part 110 of the engine 20 via the bracket part 10 provided with the female screw part 20
Can be grounded. Ground small window 12 of FIG.
FIG. 6 shows the state of Oa viewed from the direction of arrow E.

FIGS. 7 and 8 show an overall view in which the ignition device of the present invention is applied to a four-cylinder engine. In the figure, each end (not shown) of the wiring member 40a of the battery power supply terminal 40 and the wiring members 50a to 50d connected to the ignition signal terminal 50 as a common power supply of the four ignition coils 70 is 1 Each of the connector sections 170 is independently connected. In FIG. 8, a cover 160 also serving as a decorative plate is provided with a cylindrical protrusion 160a, and an elastic member 180 is further disposed inside the protrusion 160a.

The elastic member 180 presses the ignition coil 70 downward as the cover 160 is fastened and fixed to the bracket 10 by the screw 190. As a result, the fixing and holding of the ignition coil 70 and the power distribution member 30
Terminals 40 and 50 provided in the
The electrical connection with the leaf spring-like terminals 130a and 140a integrally formed with the end member 100 is more reliably performed. In the ignition device of the present invention, the ignition coil 70 is hardly mounted as a single item on an engine (not shown), and a plurality of ignition coils are provided so as to correspond to an engine (not shown) having a plurality of cylinders. The power distribution member 30 and the cover 1
The engine is mounted on an engine (not shown) as a so-called integrated ignition device integrated with the engine 60.

The ignition device according to the present invention is mounted mainly between banks (not shown) of the double overhead cam engine, and is simulated in the drawing by bolts or the like through mounting holes 10a provided in the bracket portion 10. It is fixed to the cylinder head 200 and the like of an engine (not shown), which is schematically shown.
At this time, each ignition coil 70 is arranged in each of the simulated plug holes 210 for attaching the ignition plug 220 of each cylinder to the cylinder head 200 or the like,
The ignition plug holding and engaging portion 70a of the ignition coil 70 is directly fitted to the ignition plug 220.

The connector section 170 is connected to a primary coil signal generation circuit (not shown) and a battery power supply, and has wiring members 40a, 50a to 50d connected to terminals 40, 50 embedded in the power distribution member 30, and Ignition coil 7
Terminal 13 integrally formed with the end member 100
0, 140 and the copper wires 90a, 90b connected to them.
, An ignition signal and a power supply voltage are supplied to a primary coil (not shown) of the ignition coil winding section 90. When an ignition signal is generated in the primary coil (not shown), a high voltage is generated in the secondary coil (not shown), and the high voltage is directly supplied to the ignition plug 220.

Conventionally, when an ignition coil for each cylinder is mounted on an engine, one ignition coil is fixed to each cylinder by one or more bolts, and a battery power supply and an ignition signal are connected by wires and connectors. Connection to the generator circuit is made. In this embodiment, the male screw 110
The ignition coil 70 having the
0 to the number of cylinders of an engine (not shown).
Power distribution member 3 in which terminals 40 and 50 and these wiring members 40a and 50a to 50d are embedded between the ignition coil 70 and the bracket portion 10 in advance.
By providing 0, it is possible to provide an ignition device capable of electrically connecting a battery power supply and an ignition signal.

Therefore, according to the present embodiment, the ignition coil 70
In this case, the ignition coil 70 can be fixed and held without using any bolts or the like as in the prior art, and at the same time, electrical conduction between the battery power supply and the ignition signal can be obtained. (Not shown)
The ignition coils 70 of the number of cylinders of the engine (not shown) fixed and held in advance are inserted into the respective plug holes 21 so as to face the respective ignition plugs 220 of the engine (not shown) at one time.
0, and the bracket 10 is bolted to the head cover or cylinder head 200 of the engine (not shown).
After that, it is only necessary to make an electrical connection with the outside by one connector section 170. Therefore, the man-hour for fixing and holding the ignition coil 70 and mounting the device of the present invention to the engine (not shown) can be greatly reduced.

The ignition coil winding portion 9 of the ignition coil 70
When grounding of 0 is required, it is possible to ground the engine body (not shown) relatively easily without providing special components. When the grounding of the ignition coil winding section 90 is unnecessary, a small window 120a provided in the metal material section 120 of the end member 100 of the ignition coil 70 and the grounding copper pulled out from the ignition coil winding section 90 are used. The line 90c becomes unnecessary, and the number of parts and the number of processing steps can be reduced. Further, in the present embodiment, the bracket 10 and the cover 160
Is made of a rigid metal material such as aluminum, but it is also possible to use a rigid synthetic resin material. As a result, a significant reduction in weight can be achieved.

In the present embodiment, the shape of the ignition coil 70 is shown as being cylindrical, but may be any shape such as a polygon. In the present embodiment, the terminals 40 and 50 and the wiring members 40a and 50a to 50d are described as being embedded in the power distribution member 30, but other means for obtaining electrical continuity, for example, the terminals 40 and 50 are provided on the surface of an electric circuit board. Any means such as disposing the 50 and the wiring members 40a and 50a to 50d may be used.

In this embodiment, the power distribution member 30 and the cover 160 are fixed using screws. However, other fixing means, for example, caulking, bonding, press-fitting, welding, welding, or any other means may be used. Is also good. The above-mentioned other means for obtaining electrical continuity and other fixing means can be similarly used in the second embodiment of the present invention described hereinafter.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the ignition coil is provided with a male screw portion, the bracket portion is provided with a female screw portion corresponding to the male screw portion, and the ignition coil is rotatably inserted into the bracket portion to fix the ignition coil. In the second embodiment, an elastic member is provided on the ignition coil and the reaction force thereof is used to achieve the same purpose as the first embodiment. To achieve.

Although various types of elastic materials can be considered, this embodiment will be described below using a coil spring. It should be noted that any elastic material may be used as long as the same effects as those of the present embodiment can be obtained. In the description, the arrangement of the conductive wiring member connected to the ignition coil winding portion of the ignition coil and the terminal provided on the power distribution member is almost the same as that of the first embodiment. The drawings relating to (1) are omitted, and the fixing and holding portions of one ignition coil will be mainly described.

FIG. 9 shows a second embodiment of the present invention.
This shows a state where the power distribution member 300, the ignition coil 330, and the cover 390 are assembled. The power distribution member 300, which is a synthetic resin molded product having rigidity and electrical insulation, is provided with terminals 310 and 320 as connection means made of a material having excellent conductivity such as a copper-based alloy. FIG.
0 (B) shows an example in which the device of this embodiment is applied to a four-cylinder engine (not shown), as in FIG. 7 of the first embodiment, and the wiring member connected to the terminal 310. 310b and the wiring member 320b connected to the terminal 320 (actually,
Book members are arranged. ) Is fixed by heat caulking or the like, and transmits a battery power supply and an ignition signal.

One of the terminals 310 is for a battery power supply, and 320 is a terminal for an ignition signal.
In this figure, as in FIG. 7 of the first embodiment, the battery power supply terminal 310 is used as a common power supply for the four ignition coils 330 by being integrated with the wiring member 310b. The ignition coil 330 has a coil case 340 made of a synthetic resin molded product having excellent electrical insulation properties. The coil case 340 has one end having projections 350a and 360a and the other end being inside the ignition coil 330. Electrodes 350 and 360 connected to a lead wire (not shown) of a winding part (not shown) are arranged, and the electrode part 350 is connected to an ignition coil winding part (not shown) by a battery. The power supply is provided, and the electrode section 360 supplies an ignition signal to an ignition coil winding section (not shown).

The ignition coil winding part (not shown), a part of the electrode parts 350 and 360, and a coil spring 370 made of a metal material are housed in the coil case 340, and are substantially G in FIG. It is completely fixed and held by a thermosetting resin 380 having excellent electrical insulation properties such as an epoxy resin injected or poured into the vicinity of the surface.

The electrode portions 350 and 360 are made of a material having excellent conductivity such as a copper alloy. The cover 390 made of a metal material such as aluminum having rigidity and also serving as a decorative plate is provided on the power distribution member 300 in which a bush 400 made of a metal material having a screw portion shown in FIG.
Is fixed with bolts 410 or the like. 10 (A) to 10 (C), the procedure for assembling the ignition coil 330 and each component will be described. FIG. 10A shows an ignition signal terminal 320 (battery power supply terminal 310 not shown) fixed to power distribution member 300 by heat staking or the like, and a state before ignition coil 330 is inserted into gap L of cover 390. It is shown.

From this state, the ignition coil 330 is moved to I in FIG.
The coil spring 370 fixed to and held by the ignition coil 330 from the direction
0 to the H plane, and similarly fixed to the ignition coil 330,
The held protruding portions 350a and 360a of the battery power supply electrode portion 350 and the ignition signal electrode portion 360 correspond to the opening P provided in the power distribution member 300 and the electrode portions 350 and 360, respectively.
The coil spring 370 is inserted into the gap L through a slit portion S that allows the coil spring 370 to be pushed upward from below until it fits in the gap L. FIG.
FIG. 10B shows this state with the cover 390 of FIG. 10A removed, as viewed from the direction of the arrow J in FIG.

From this state, the protruding portions 350a and 360a of the battery power supply electrode portion 350 and the ignition signal electrode portion 360, which are fixed and held by the ignition coil 330, respectively,
The ignition coil 33 is locked until it is locked in the small holes 310a and 320a provided in the battery power supply terminal 310 fixed to the power distribution member 300 and the ignition signal terminal 320.
0 is rotated in the K direction in the figure. FIG. 10C shows the state. From this state, the reaction force of the coil spring 370 acts on the ignition coil 330 by removing the force required to rotate and insert the ignition coil 330 until then.
The ignition coil 330 is pressed downward.

As a result, the ignition coil 330 is connected to the power distribution member 3
00 and fixed and held at the same time as the power distribution member 3
The electrical connection between the terminals 310 and 320 fixed to 00 and the electrode portions 350 and 360 fixed to the ignition coil 330 is obtained. Here, since the ignition coil 330 is inserted by rotation, the terminals 310 and 320 fixed to the power distribution member 300 have a generally fan-shaped shape. In addition,
Reference numerals 300a and 300b denote stopper portions for preventing the rotation of the ignition coil 330, and are formed integrally with the power distribution member 300 as projections.

A wiring member 310b connected to a battery power supply terminal 310 serving as a common power supply for an ignition coil 330 fixed to the power distribution member 300 and a wiring member 320b connected to an ignition signal terminal 320
(In actuality, four wiring members including the wiring member 320b are arranged.) Each end (not shown)
Are independently connected to a connector (not shown) provided at one end of the power distribution member 300, similarly to FIG. 7 of the first embodiment according to the present invention. In the second embodiment, the shape of the ignition coil 330 is shown as being cylindrical, but may be any shape such as a polygon.

In the ignition device according to the present invention, as described in the description of the first embodiment, the ignition coil 330 is hardly attached to an engine (not shown) as a single item. As shown in FIG. 7 and FIG. 8 of the example, usually, a plurality of cylinders are used so as to correspond to an engine (not shown) having a plurality of cylinders such as a four-cylinder engine (not shown). The engine 390 is mounted on an engine (not shown) as a so-called integrated ignition device. The ignition device according to the present invention is mounted mainly between the banks (not shown) of the double overhead cam engine, similarly to the device of the first embodiment, and is provided with a four-cylinder engine (not shown).
11 is fixed to a cylinder head 440 or the like of an engine (not shown) simulated in the figure by bolts 430 or the like through a plurality of mounting holes 420 provided in a cover 390 of FIG. .

At this time, each ignition coil 330
Connects the ignition plug 220 of each cylinder to the cylinder head 440.
Simulated plug holes 45 for attachment to
The ignition plug holding engagement portion 330 a of the ignition coil 330 is directly fitted to the ignition plug 220. In addition, the ignition coil winding part (not shown) of the ignition coil 330
When the grounding is necessary, the other end (not shown) of the tip 370a of the coil spring 370 is connected to the grounding copper wire 90c drawn from the ignition coil winding part 90 shown in the first embodiment. , It is possible to ground the engine body (not shown) via the coil spring 370 and the cover 390. Hereinafter, the operation and effects of the ignition device in the second embodiment are almost the same as those described in the first embodiment.

[0046]

In the ignition device for an internal combustion engine according to the present invention, an electrode connected to an end of an ignition coil winding provided in the ignition coil is provided at an end of the ignition coil. At the same time, one end of the conductive wiring member embedded in the power distribution member is formed so as to be exposed on the surface of the power distribution member, and the electrode and the end of the conductive wiring member of the power distribution member are formed. Are electrically slidable with each other so that the ignition coil can be rotationally fitted and fixed to the bracket portion. As a result, it is possible to easily connect and fix the ignition coil, and it is possible to easily and quickly perform the fixing operation of the ignition coil without requiring strict adjustment of the fixing position of the ignition coil. I can do it. Also, in the present invention, the connection between the ignition coil and the power supply section can be ensured, and the number of parts at the time of assembly can be reduced, so that much labor is required for mounting the ignition device to the internal combustion engine. There is an excellent effect that there is no need.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing the structure of an embodiment of an ignition device for an internal combustion engine according to the present invention and the assembly thereof.

FIG. 2 is a side view showing a configuration example of an ignition coil used in the ignition device for an internal combustion engine according to the present invention.

FIG. 3 is a partial sectional view showing a specific example of a connection structure between the ignition coil and a power distribution member in the ignition device for an internal combustion engine according to the present invention.

FIG. 4 is a plan view showing a configuration example of a terminal of a power distribution member used in the ignition device for an internal combustion engine according to the present invention.

FIG. 5 is a plan view showing an example of a shape of an upper end portion of an ignition coil used in an ignition device for an internal combustion engine according to the present invention.

FIG. 6 is a partial cross-sectional view of a configuration example of an end member of the ignition coil according to the present invention.

FIG. 7 is a plan view showing a configuration example of a bracket portion and a power distribution member used in the ignition device for an internal combustion engine according to the present invention.

FIG. 8 is a diagram showing an ignition device for an internal combustion engine according to the present invention;
It is a side view showing the state where it was used attached to the engine of the cylinder internal combustion engine.

FIG. 9 is a side view showing the configuration of another specific example of the ignition device for an internal combustion engine according to the present invention.

FIG. 10 is a view showing a procedure for connecting an ignition coil to a power distribution member in another specific example of the internal combustion engine ignition device according to the present invention.

FIG. 11 is a side view showing a state where another specific example of the ignition device for an internal combustion engine according to the present invention is mounted on an engine of a four-cylinder internal combustion engine and used.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Bracket part 20 ... Female thread part 30, 300 ... Power distribution member 40, 50 ... Terminal 40a, 50a-50d, 310b, 320b ... Conductive wiring member 70, 330 ... Ignition coil 80, 340 ... Coil Case 90: ignition coil winding part 90a, 90b: lead wire of ignition coil winding part 100: end member of ignition coil 110: male screw part 120: metal material part 130, 140, 350, 360: electrode part 130a, 140b, 350a, 360a: Tip protrusion of electrode section 170: Connector section 180, 370: Elastic member 310, 320: Sector terminal section 300a, 300b: Stopper section 390: Cover O, P: Opening section S: Slit section

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-2-283863 (JP, A) JP-A-60-199063 (JP, A) JP-A 61-76166 (JP, U) JP-A 61-76166 159672 (JP, U) Special table 60-601961 (JP, A) (58) Field surveyed (Int. Cl. ⁶ , DB name) F02P 15/00 303 H01F 38/12

Claims (1)

(57) [Claims] An ignition device for supplying a high voltage for ignition to each ignition plug arranged in each cylinder of a multi-cylinder internal combustion engine, wherein an ignition coil is fitted at a position facing the ignition plug of each cylinder. A power distribution member having an opening for joint support and having a plurality of conductive wiring members arranged thereon, and a fitting to the opening of the power distribution member and from the power distribution member toward each of the ignition plugs. And an ignition coil having a built-in ignition coil winding portion for driving each ignition plug therein, in the vicinity of an end of the ignition coil fitted with the power distribution member. Is provided with an electrode portion connected to a winding end of an ignition coil winding portion incorporated in the ignition coil, and one end of the conductive wiring member arranged and formed on the power distribution member. Section is located near the opening of the distribution member. A terminal portion is formed, and the other end of the conductive wiring member is connected to a lead portion of a connector portion provided in a part of the power distribution member, and the ignition coil is connected to the power distribution member. The electrode portion of the ignition coil and the terminal portion of the conductive wiring member formed near the opening of the power distribution member are fitted with each other through a mechanism that can rotate with respect to the ignition coil. An ignition device for an internal combustion engine, wherein the ignition device is configured to maintain electrical connection with each other within a rotation range.