JPH06264859A - Ignitor - Google Patents

Abstract

(57) [Abstract] [Purpose] By increasing the strength and reliability of the structure by eliminating the bonding process as much as possible, a special collar is used to prevent deformation of the aluminum base, The purpose is to prevent deterioration of reliability. [Structure] The connector is integrally molded in the molded case.
A structure in which a lock member and a rubber seal are later inserted inside the connector. Simultaneously mold the dedicated collar to the molded case. [Effect] It is possible to improve workability and ensure reliability. Therefore,
We can always supply igniter modules with stable quality.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device for an internal combustion engine, and more particularly to a structure having a connector integrally molded in a mold case.

[0002]

2. Description of the Related Art In the prior art, a connector was fitted in a mold case, and after bonding, the lower metal base was screwed and bonded. However, this requires positioning of the mold case and the connector. Further, since there is an adhesive portion, the strength is insufficient and the reliability is low. In addition, since the connector is retrofitted, the number of work processes has increased.

[0003]

In the above-mentioned prior art, since the connector assembly is attached to the molded case afterward, positioning is required when bonding. Further, the wiring with the internal element also requires positioning and soldering, which requires a great number of working steps. Further, since there is an adhesive portion, the strength is lowered and the reliability is also lowered. Book,
The challenge is to manufacture a reliable and stable igniter by simply molding the connector into the molded case and inserting the mating connector locking member and the waterproof rubber ring inside the connector. there were.

[0004]

In order to describe the above object, a connector is integrally formed with a mold case and a dedicated metal collar is simultaneously formed.

A member for locking the mating connector and a waterproof rubber ring are inserted into the case connector.

The dedicated metal collar is a collar for screw tightening, and its size is increased in proportion to the screw axial force. In this case, since the tightening screw is M6 bolt, the maximum axial force is
Assuming a torque coefficient of 0.2,

[0007]

[Equation 1]

Here, Q: Axial force T: Tightening torque K: Torque coefficient d: Bolt diameter, Q = 1.2 tons. When the lower metal base is aluminum, the maximum tensile stress is 20 kgf. / Mm ²
Therefore, by taking a safety factor to some extent and setting the outer diameter of the metal collar to about φ12 to φ13 mm, the stress applied to the seat surface is relaxed and the lower aluminum base does not deform.

[0009]

[Function] The strength is improved by integrally molding the connector in the mold case. Conventionally, the connector has been bonded to the mold case, but by integrally molding, the metal terminals for the connector are distributed in the mold, and the bonding part is eliminated, so that the reliability can be improved.

An igniter of stable quality can be constructed only by inserting a member for locking the mating connector into the connector. Further, the metal collar portion is selected so that it does not buckle itself even when the metal collar portion is screwed, and the metal collar portion is brought into contact with the lower aluminum base. By doing so, it is possible to secure a large seating surface area and prevent the screws and the igniter body from falling off without causing deformation of the aluminum base even when a strong axial force is applied.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The wiring of the ignition circuit shown in FIG. 6 is an example applied as an embodiment of the igniter of the present invention.

One of the primary windings 14 of the ignition coil is connected to the power source from the battery 16 and the other end is connected to the power switching element of the internal element of the igniter 1 for driving the ignition coil. Further, the secondary voltage generated in the secondary winding 15 of the ignition coil is guided to the spark plug 16.

In the igniter 1 shown in FIG. 1, the power switching element 9 is soldered on an aluminum base 11 and a HIC board 8 is further adhered thereto, and then a mold case 10 is wrapped around the aluminum base. Bonded from above. Further, in that state, each part is bonded with the aluminum wire 7 for electrical connection. At that time, a connector is used for connection with the external parts shown in FIG. 6, and of course, for connector wiring, the terminal 6 for internal wiring of the igniter 1 is integrated with the mold case 10 of the igniter 1. The molded male connector 2 is molded at the same time. The mating connector is inserted into the connector 2 of the igniter 1, the nylon member 3 as a member for locking, and the rubber ring 4 for the purpose of waterproofing the connector. FIG. 6 shows a state in which the mating connector is inserted and wiring with external parts is performed. The engine control unit 13 of FIG. 6 is wired to the igniter 1, and receives the signal pulse from the engine control unit 13, the igniter 1 electrically operates so as to induce a secondary voltage in the spark plug 16. Of.

The connector 2 shown in FIG.
Although it was purchased from a connector maker and fitted into the mold case 10 and adhered thereto, by integrally molding with the mold case 10 according to the present invention, positioning is unnecessary, strength is further increased, and reliability is greatly improved. Let
Further, when positioning, the conventional igniter has been soldered because of problems such as positioning with the internal terminal 6, but with the igniter of the present invention which does not require positioning, aluminum wire bonding can be performed, resulting in work efficiency. Can improve the reliability and reliability.

The exclusive metal collar shown in FIG. 3 uses brass here and is integrally formed with the mold case.

The collar is a so-called mounting hole for mounting the igniter 1 by bolting when mounting the igniter 1 in the engine room of an automobile. Here, M6 bolts are often used for mounting parts in the engine room of automobiles, and the axial force thereof may exceed 1.2 tons at the maximum. In this case, as shown in FIG. 3, if the seat surface area of the brass collar 5 integrally molded with the mold case 10 on the aluminum base 11 is small, the aluminum base 11 is deformed by receiving the bolt axial force. ,
It is fully conceivable that the M6 bolt may fall off or the igniter 1 may malfunction due to the depression. Therefore, the outer diameter of the brass collar is φ12 to φ13.
By setting the thickness to about mm, the aluminum base 11 is not deformed and the bolt is prevented from falling off. Further, the brass collar is used when simultaneously molding the mold case 10,
When tightened with a bolt, a knurled groove is applied to prevent it from rotating even if it receives the rotational force of the bolt, but because it is easy to process, a soft brass material is used, and yet the axial force of the bolt is Even when received, it is selected because it is a material that also has strength that does not buckle itself.

[0017]

According to the present invention, by integrally molding the connector with the mold case, the strength of the connector portion can be increased and the alignment with the internal element is not required.
Also, by using a dedicated metal collar, the seating area with the lower aluminum base is made large, and the aluminum base does not deform even when tightened with bolts, and the malfunction of the igniter does not occur, so it is always stable and reliable. Can supply high module.

[Brief description of drawings]

FIG. 1 is a plan view showing an internal igniter element of the present invention.

FIG. 2 is a cross-sectional cut view with the mold cover shown in FIG.

FIG. 3 is a front view of FIG. 1, showing an embodiment in which the metal collar and the aluminum base member of the present invention are partially cut.

FIG. 4 is a view showing an embodiment in which a mold cover is added to the plan view of FIG.

5 is a bottom view of FIG. 4, showing an embodiment in which an aluminum base can be seen. FIG. .

FIG. 6 is a diagram showing an example of a wiring example of the igniter of the present invention.

[Explanation of symbols]

1 ... Igniter, 2 ... Male connector, 3 ... Female connector locking member, 4 ... Rubber ring, 5 ... Dedicated metal collar,
6 ... Terminal, 7 ... Aluminum wire, 8 ... HIC board, 9 ... Power switching element, 10 ... Mold case, 11 ...
Aluminum base, 12 ... Cover, 13 ... Engine control unit, 14 ... Primary winding, 15 ... Secondary winding, 16
… Batteries, 17… spark plugs.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noboru Sugiura 2520 Takaba, Katsuta-shi, Ibaraki Hitachi, Ltd. Automotive Equipment Division (72) Inventor Ryoichi Kobayashi 2520 Takaba, Katsuta-shi, Ibaraki Hitachi Ltd. (72) Inventor, Katsuaki Fukatsu, 2477 Kashima Yatsu, Kashima Yatsu, Katsuta City, Ibaraki Prefecture 3 Hitachi Automotive Engineering Co., Ltd.

Claims (2)

[Claims] 1. An internal combustion engine ignition device comprising a control circuit board, an ignition drive power device, a molded case, a heat dissipation metal base, an input / output connector and a mounting portion, wherein the input / output connector is integrally formed with the molded case. An igniter comprising a lock member for inserting a waterproof rubber ring into the connector and fixing the waterproof rubber ring. 2. The heat dissipating base according to claim 1, wherein the mounting portion is composed of a metal collar integrally molded with the mold case and a heat dissipating base. Ignition module characterized by being set within the stress range.