JPH0318695Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a power distribution device for an internal combustion engine in which an ignition coil is built into a power distribution device housing, and particularly to an improvement in the heat dissipation characteristics of the ignition coil.

[Conventional technology]

Conventionally, as this type of power distributor, one shown in FIG. 2 has been proposed. In the figure, 1 is a power distribution housing, 2 is a cap, 3 is a shaft rotated by an internal combustion engine, 4 is an ignition coil built in the end of the power distribution device housing 1, and one end face 401 is a power distribution device. It faces the end surface 101 of the housing 1 . 5 is the other end surface 4 of the ignition coil 4
02 is a heat sink, 6 is a screw, 7 is a washer, and the washer 7 is a part of the heat sink 5.
When the screw 6 is tightened to the shoulder 102 of the distributor housing 1, the washer 7 directs the other end surface 402 of the ignition coil 4 toward the end surface 101 of the distributor housing 1 via the heat sink 5. The ignition coil 4 is fixed within the power distributor housing 1 by pressing it. In addition, 8 is a magnetic signal generator that generates an ignition signal corresponding to each cylinder of the internal combustion engine, 9 is a centrifugal advance device, 10 is a vacuum advance device, 1
Reference numeral 1 denotes an ignition timing control unit that appropriately processes the ignition signal from the magnet signal generator 8 and cuts off and on the primary current of the ignition coil 4 at appropriate timing.

[Problem that the invention attempts to solve]

In the conventional power distributor for an internal combustion engine as described above, the heat sink 5 contacts the power distributor housing 1 only at its outer periphery, so that the heat generated by the ignition coil 4 is effectively transferred to the power distributor housing 1. There were problems such as the heat dissipation efficiency of the ignition coil 4 was poor, screws 6 and washers 7 were required to fix the ignition coil 4, and the number of parts was large.

This idea was made to solve the problems of the conventional ones, and it is a power distributor for internal combustion engines that can fix the ignition coil with fewer parts and improve the heat dissipation efficiency of the ignition coil. The purpose is to provide

[Means for solving problems]

The power distribution device for an internal combustion engine according to this invention integrates a heat sink for an ignition coil and a washer for fixing the ignition coil.

[Effect]

In this invention, since the heat sink and the washer are integrated, the number of parts is reduced and heat transfer from the ignition coil to the distributor housing is promoted.

〔Example〕

An embodiment of this invention will be described below with reference to FIG. FIG. 1 is a longitudinal sectional view of the embodiment,
Components that are the same as those in FIG. 2 are given the same reference numerals, and their explanation will be omitted. Reference numeral 12 denotes a heat dissipation/ignition coil fixing plate which integrates the heat dissipation plate 5 and washer 7 shown in FIG. Therefore, Watshiya 7
is no longer necessary, reducing the number of parts, and since the heat dissipation/ignition coil fixing plate 12 comes into face-to-face contact with the shoulder portion 102 of the power distributor housing 1, heat transfer from the ignition coil 4 to the power distributor housing 1 is promoted. The heat radiation efficiency of the ignition coil 4 is improved.

Note that since the washers 7 are usually provided at two or three locations in the circumferential direction, it is sufficient to simply integrate them with the heat sink at these locations, but it is necessary to appropriately design the power distribution housing 1 and other components. , the shoulder 102 is attached to the distributor housing 1.
The heat dissipation/ignition coil fixing plate may be provided around the entire circumference of the shoulder portion 102, and the heat dissipation/ignition coil fixing plate may be brought into contact with the shoulder portion 102 over the entire circumference. Also, other fastening members such as rivets may be used in place of the screws 6.

[Effect of idea]

As described above, according to this invention, since the heat sink of the ignition coil and the washer for fixing the ignition coil are integrated, the number of parts can be reduced and the heat radiation efficiency of the ignition coil can be improved.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view of one embodiment of this invention;
The figure is a longitudinal sectional view of a conventional power distribution device for an internal combustion engine. In the figure, 1 is a power distribution housing, 101 is an end face, 4 is an ignition coil, 401 is one end face, 4
02 is the other end surface, 5 is a heat sink, 6 is a tightening member (screw), 7 is a washer, and 12 is a heat sink/ignition coil fixing plate. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] An ignition coil is built in the distributor housing with one end face facing the end face of the distributor housing, and is fastened to the distributor housing by a heat sink and a tightening member provided on the other end face of the ignition coil. A power distributor for an internal combustion engine comprising a washer which fixes the ignition coil in the power distributor housing by pressing the other end face of the ignition coil toward the end face of the power distributor housing when the washer is fixed. A power distribution device for an internal combustion engine, characterized in that it is integrated with a heat sink to form a heat dissipation/ignition coil fixing plate.