JP3321938B2 - 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 in which a plurality of ignition coils are integrated in one ignition coil case.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No.
There was one described in JP-A-121252. As shown in FIG. 6, a plurality of ignition coils 200, 210, and 220 are housed inside an ignition coil case, and a metal terminal for receiving an electric signal of each ignition coil protrudes from an upper end surface of the ignition coil case. After completing the wiring of the metallic wire to the metallic terminal of each ignition coil, the metallic terminal is bent to house the wiring portion in the ignition coil case. 6, 201 ′ and 202 ′ are metallic terminals,
Reference numerals 400 'and 401' denote enamel wires, and 300 'denotes an ignition module for accommodating power transistors that are centrally arranged.

[0003]

However, in the above-described conventional device, when a metal wire is wired to a metal terminal for receiving an electric signal of each ignition coil, the connection portion is soldered or fused (electrically connected). (Weld welding) or the like. After that, the metal terminal is bent. As a result, there is a problem that wiring workability is poor and cost is increased.

In view of the above problems, an object of the present invention is to provide an integrated ignition device for an internal combustion engine with improved wiring workability.

[0005]

According to the first aspect of the present invention,
Ignition of each spark plug arranged in each cylinder of a multi-cylinder internal combustion engine
Ignition coils to supply high voltage for
The connector and the insulation coating
A metal wire that provides electrical continuity for the coil
Ignition device for internal combustion engine housed inside the case
The metal wire inside the ignition coil case.
The storage holding part for determining and holding projects from the bottom
Made, in the housing holder, the slit of the connector
When the formed bifurcated metal terminal is inserted
Therefore, the metal wire positioned in the storage holder is formed.
The insulation coating of the ear is broken, and the metal wire is
By holding it in the slit of the metal terminal,
The metallic terminal of the connector and the metallic wire
It is characterized by being connected by pressure welding . Furthermore, in the second aspect , each ignition plug disposed in each cylinder of the multi-cylinder internal combustion engine is provided.
Multiple ignition coils to supply high voltage for ignition to lugs
Connector, connector, insulation coating
Metal wire for establishing electrical continuity of the ignition coil section from the
For an internal combustion engine with a housing inside a single ignition coil case
In the ignition device, the metal
Storage and holding section for positioning and holding wire
From the ignition core.
Bifurcated metal terminal with slit in the il part
Is inserted into the storage and holding section.
The insulation coat of the metal wire is broken,
Hold the metal wire in the slit of the metal terminal
The metal terminal of the ignition coil unit.
And the metallic wire is connected by pressure welding.
It is a sign .

[0006]

According to the first aspect of the present invention, since the ignition coil case houses the plurality of ignition coils and the connector therein, and the connection portions thereof are simply connected by the press-fitting connection which presses the terminal against the metal wire. In addition, wiring work is facilitated, and wiring workability is improved. Further, it is possible to housing holding unit is temporarily fixed to connector into mechanical ignition coil case while positioning the metal wire. I
The metal wire is accurately positioned on the holding part.
The metal terminal and the metal wire are pressed into the desired position.
Can be performed with high accuracy. Claim of the invention
According to Item 2, the ignition coil case is provided with the plurality of ignition coils.
And the connector are housed inside, and their connection is simple.
To the terminal by pressing the terminal against the metal wire
Wiring work becomes easier and wiring workability is improved.
Would be better. Also, the storage and holding part positions the metal wire.
And mechanically set the ignition coil in the ignition coil case.
Can be temporarily fixed to the screw. Moreover, the housing holding section
The metal wire is positioned correctly and the metal terminals and metal
Press-bonding with metal wires can be performed accurately at desired positions.
It can be. According to claim 3 of the present invention, ignition
Since the coil part has an ignition coil and a module
The ignition timing can be easily controlled and the structure can be simplified.
According to the fourth aspect , the module and the ignition coil are directly connected without interposing the metal wire.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A four-cylinder ignition device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an ignition coil case 100 and ignition coils 200, 210, 220, 230 which are main components of a first embodiment of the present invention.
And coated single copper wire 401, 402, 403, 404, 4
05, 406, 407 and ignition modules (hereinafter simply referred to as modules) 300, 310, 320, 33
FIG. 5 is an exploded perspective view showing a connector 0 and a connector 500. Each ignition coil 200 is provided inside the modules 300 to 330.
A switching unit such as a power transistor for energizing and interrupting the current to 230 is housed.

FIG. 2 is a view of the ignition coil case 100 of FIG. 1 as viewed from above. FIG. 3 and FIG. 4 show that the ignition coils 200 and 2 in FIG.
10, 220, 230 and single copper wires 401, 402, 403, 404, 405, 40 coated with vinyl or urethane.
6,407 (constituting the metallic wire of the present invention) viewed from above, and module 30
FIG. 5 is an exploded view of the connector 500 when viewed from below, at 0, 310, 320, 330, and M indicates a matching line.

FIG. 5 shows the module 3 in FIGS.
After assembling the connector 500 with the 00, 310, 320, 330, a casting resin 6 such as an epoxy resin having electrical insulation properties.
00 and then a rubber cap having electrical insulation such as silicon rubber is attached to the high-pressure tower sections 120, 121, 122, 123 of the ignition coil case 100.

First, referring to FIG.
00 denotes four ignition coils 2 having a primary winding and a secondary winding.
Storage room 11 for storing 00, 210, 220, 230
0, 111, 112, 113 and their respective ignition coils 20
0, 210, 220, 230 high-pressure tower sections 120, 121, 12 for transmitting high voltage to spark plugs
2,123. Also, as shown in FIGS. 3 and 4, connection terminals (module terminals) 301, 302, 303, and 30 of the modules 300, 310, 320, and 330 are provided.
4,305,306 and 311,312,313,31
4,315,316 and 321,322,323,32
4,325,326 and 331,332,333,33
Single copper wire 40 containing 4,335,336 and covered
1,402,403,404,405,406,407
Storage holders 131, 132, 13 for holding
3,134,141,142,143,144,15
1,152,153,154,161,162,16
3,164. Further, connection terminals 501, 502, 503, 50 of the connector 500 for signal connection with the outside.
4, 505, 506, 507 are accommodated and the coated single copper wires 401, 402, 403, 404, 405, 40
6, 407, a projection-like storage holding portion 171, 1
72, 173, 174, 175, 176 and 177 are provided on the bottom surface 100a of the ignition coil case 100. And
The ignition coil case 100 is made of an electrically insulating resin such as PBT.

The ignition coils 200, 210, 220, and 230 are mounted in the storage chambers 110, 111, 112, and 113 shown in FIG. Each of the ignition coils 200, 210, 220, and 230 has a module 300, 310, 320, and 330 as shown in FIG.
Input terminals 201, 202, 211, 21 for connection to
2,221,222,231,232. Here, one terminal 201, 211, 221, 231 is a terminal that receives the battery power transmitted from the terminals of the modules 300, 310, 320, 330, and the other terminal 20.
2, 212, 222 and 232 are modules 300 and 3
These terminals receive ignition signals sent from the terminals 10, 320, and 330.

Next, in the ignition coil case 100, coated single copper wires 401, 402, 403, 404, 405,
406 and 407 are wired. At this time, the storage holding portions 131, 132, 13 in the ignition coil case 100 shown in FIG.
3,134,141,142,143,144,15
1,152,153,154,161,162,16
3,164,171,172,173,174,17
5, 176, 177, the coated single copper wire 40 shown in FIG.
1,402,403,404,405,406,407
And hold these single copper wires.

More specifically, the coated single copper wire 401 is attached to and held by the housing holding portions 131, 141, 151, 161, 171 in the ignition coil case 100. Storage holding parts 132, 142, 152, 1 in ignition coil case 100
The coated single copper wire 402 is attached to 62 and 172 and held. Storage and holding parts 133, 1 in ignition coil case 100
43, 153, 163, 173 coated copper wire 403
Assemble and hold. The coated single copper wire 404 is attached to the holding portions 164 and 174 in the ignition coil case 100 and held. Storage and holding 1 in ignition coil case 100
The coated single copper wire 405 is attached to 54 and 175 and held. Storage and holding portion 144, 1 in ignition coil case 100
The coated single copper wire 406 is attached to 76 and held. The coated single copper wire 407 is attached to and held by the housing holding portions 134 and 177 in the ignition coil case 100.

Next, as shown in FIGS. 1 and 5, the modules 300 and 31 are placed at respective positions of the ignition coil case 100.
0, 320, 330 and the connector 500 are assembled. That is, the modules 300, 310, and 32 shown in FIGS.
0 and 330 module terminals 301, 302, 30
3,304 and 311,312,313,314 and 32
1,322,323,324 and 331,332,33
Reference numerals 3 and 334 denote storage holders 131, 132, 133 and 134, and 141 and 14 in the ignition coil case 100, respectively.
2,143,144 and 151,152,153,15
4, and 161,162,163,164.

The metallic terminal 50 of the connector 500
1,502,503,504,505,506,507
Are respectively housed and held in the ignition coil case 100.
1, 17, 173, 174, 175, 176, 177. Here, the module terminal 3 shown in FIGS.
03, 313, 323 and 333 are connection terminals for battery power, and terminals 304, 314, 324 and 334 are
Terminals for ignition signals, terminals 305, 315, 32
5,335 are connection terminals for sending battery power to the ignition coil. Terminals 306, 316, 326, 33
Reference numeral 6 denotes a connection terminal for sending an ignition signal to the ignition coil, and terminals 301, 311, 321, and 331 are connection terminals for monitor signals, and terminals 302, 312, 322, and 3
32 is a ground connection terminal.

Further, a metallic terminal 503 of the connector is provided.
Is a connection terminal for a battery power supply, a terminal 507 is a connection terminal for an ignition signal for the module 300, and a terminal 506 is a connection terminal for an ignition signal for the module 310. Further, a terminal 505 is a connection terminal for an ignition signal for the module 320, a terminal 504 is a connection terminal for an ignition signal for the module 330, and the terminal 501 is
A monitor signal connection terminal, and a terminal 502 is a ground connection terminal.

The connection terminals (module terminals) 305 and 306 of the module 300 are connected to the input terminals 201 and 202 of the ignition coil 200 and the module 3 respectively.
The ten connection terminals 315 and 316 are assembled with the input terminals 211 and 212 of the ignition coil 210, respectively. Also,
The connection terminals 325 and 326 of the module 320 are respectively
The input terminals 221 and 222 of the ignition coil 220 and the connection terminals 335 and 336 of the module 330 are assembled with the input terminals 231 and 232 of the ignition coil 230, respectively. At this time, the connection terminals 301, 302,
303, 304 and 311, 312, 313, 314 and 3
21,322,323,324 and 331,332,33
Reference numerals 3 and 334 denote coated single copper wires 401, 402, 403, 404, and 40 held in the ignition coil case 100.
Fitting slits smaller than the copper wire diameters of 5,406,407 are provided as shown in FIG. 1 to form a forked terminal. As a result, the sharp edge of the fitting slit of the connection terminal of this module breaks the coating of the coated single copper wire, and is press-bonded to the single copper wire inside, thereby achieving electrical continuity.

Similarly, module terminals 315, 31
6, 325, 326, 335, and 336 have input terminals 211, 212, and 22 of the ignition coil to be fitted with each other.
1, 2, 222, 231, 232 are provided with slits thinner than the plate thickness. Thereby, the slit portion of the connection terminal of the module is press-contacted with the input terminal of the ignition coil, and electrical conduction is obtained.

Similarly, the connection terminal 50 of the connector 500
1,502,503,504,505,506,507
Are mating mating members, and the coated single copper wires 401, 402, 403, 40 held in the ignition coil case 100.
The slits smaller than the copper wire diameters of 4,405,406,407 are provided. Thereby, the slit of the connection terminal of the connector breaks the coating of the coated single copper wire, and is press-bonded to the inner single copper wire, thereby achieving electrical continuity. Next, the casting resin 600 is poured into the ignition coil case 100 so as to cover the above-mentioned built-in components and the connection portions, and the components are insulated and fixed.

Therefore, according to the present invention, the connection between the coated copper wire and the terminal of the module, the connection between the coated copper wire and the terminal of the connector, and the connection between the ignition coil terminal and the terminal of the module are press-welded. Accordingly, soldering or fusing can be omitted, and wiring workability is improved. next,
Another embodiment of the present invention will be described.

In the second embodiment, a single copper wire with an enamel coating is used instead of the single copper wire coated with vinyl or the like used in the first embodiment, and the other configuration is the same as that of the first embodiment. . In this embodiment, the same effects as in the first embodiment can be obtained. That is, the single copper wire used in the present invention may be a metallic wire having an insulating cord applied to the outer periphery. In the third embodiment, unlike the first embodiment, the module is not incorporated in the ignition coil case. In this case, the connection input terminal of the ignition coil and the coated single copper wire are pressure-welded to establish electrical continuity. In other words, the input terminal of the ignition coil is provided with a slit that is smaller than the copper wire diameter of the coated copper wire that is the mating partner, thereby breaking the coating of the coated copper wire and crimping the inner copper wire. It is joined so that electrical continuity can be obtained. In this embodiment, the same effects as in the first embodiment can be obtained.

[0022]

As described above, according to the present invention, the connection between the ignition coil and the metal wire and the connection between the connector and the metal wire are joined by pressure welding, so that the wiring work is facilitated and the wiring workability is improved. improves. Further, according to another aspect of the present invention, since the metal wire is positioned, the insulating coat of the metal wire can be reliably peeled off with the slit, and the reliability of conduction is improved, and the temporary fixing also facilitates the assembly. According to still another aspect of the present invention, the metal wire between the module and the ignition coil can be omitted, and the assembling operation can be speeded up and facilitated.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the device of the present invention.

FIG. 2 is a perspective view of the ignition coil case in the first embodiment as viewed from above.

FIG. 3 is a partially exploded perspective view showing how to attach each component to an ignition coil case in the first embodiment.

FIG. 4 is an exploded perspective view showing another part of FIG. 3;

FIG. 5 is a perspective view showing a state after assembly of the first embodiment.

FIG. 6 is a plan view showing a conventional device.

[Explanation of symbols]

200, 210, 230 Ignition coil 300, 310, 320, 330 Module 500 Connector 100 Ignition coil case 100a Bottom of ignition coil course 401, 402... 406, 407 Metallic wires 131, 132. .. 506, 507 Metal terminals of connector 201, 202... 231 and 232 Input terminals for connection of ignition coil

Claims (4)

(57) [Claims] 1. Each point arranged in each cylinder of a multi-cylinder internal combustion engine
Multiple ignitions to supply high voltage for ignition to spark plugs
Coils, connectors, insulation coating
Metal wire for providing electrical continuity between the ignition coil and the ignition coil
For an internal combustion engine with a housing inside a single ignition coil case
In the ignition device, the metal wire is positioned in the ignition coil case.
The storage holding part for holding
Is, in the housing holder, the slit of the connector is formed
The metal terminal is inserted into the
The insulation coat of the metal wire positioned on the holding portion is
The metal wire is broken and the metal terminal is slipped.
By holding the connector in the socket,
The metal terminal and the metallic wire are connected by pressure welding.
An ignition device for an internal combustion engine, comprising: 2. Each point arranged in each cylinder of a multi-cylinder internal combustion engine.
Multiple ignitions to supply high voltage for ignition to spark plugs
Coils, connectors and insulation coating are applied.
Metal wire for electrically connecting the ignition coil section from the
Internal combustion engine with ears housed inside a single ignition coil case
In the ignition device for Seki , the metal wire is positioned in the ignition coil case.
The storage holding part for holding
And a slit of the ignition coil section is formed in the storage holding section.
By inserting the metal terminal
Insulation coating of the metal wire positioned in the holding part
The metal wire is broken and the metal wire is
By holding the ignition coil in the slit,
The metal terminal and the metal wire are press-welded.
An ignition device for an internal combustion engine, which is connected. 3. The ignition coil unit includes an ignition coil and a module.
An ignition device for an internal combustion engine, comprising: 4. A module containing a plurality of ignition coils for supplying a high voltage for ignition to each ignition plug disposed in each cylinder of a multi-cylinder internal combustion engine, and switching means for controlling a current flowing through the ignition coils. And a connector housed in a single ignition coil case, wherein the metal is provided with an insulating coating on a surface for electrically connecting the module and the connector. An ignition coil case having a large number of storage and holding portions protruding from its own bottom side for positioning and fixing the metal wire, and a plurality of bifurcated metal terminals provided with slits. Each of the terminals is inserted into each of the storage holding portions of the ignition coil case, the insulating coat is broken at the edge of the slit, and the electrical connection is established. A connector made between the attribute wire and the terminal, an ignition coil which is placed in the ignition coil case so that a back side faces the ignition coil case side, and an input terminal for connection is provided on the front side; And a plurality of bifurcated metallic module terminals provided with slits, wherein a part of the module terminals is inserted into the storage holding portion protruding from the bottom side of the ignition coil case, and an edge of the slit is provided. The electrical connection is made between the metallic wire and the module terminal, and the other part of the module terminal mechanically contacts the input terminal for connection. And a module electrically connected to the ignition coil.