JPS627390B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides an engine ignition system in which a semiconductor amplifier circuit having an ignition function is configured as a single ignition unit, and this ignition unit is removably built into a power distribution housing. Regarding equipment.

[Conventional technology]

In conventional devices of this kind, as in Japanese Patent Application Laid-Open No. 54-8227, the power transistor of the ignition unit is mounted on a fixed base made of a material with good thermal conductivity to improve heat dissipation from the power transistor.

In addition, as in Utility Model Application No. 53-68840, an amplification control circuit device integrated as an integrated circuit is attached to the outer surface of the housing, and input terminals that protrude into the housing and are connected to the lead wires of the signal generator, and By providing connector terminals that protrude outside from the case of the control circuit device, there is no need to pull out the lead wires from the housing, and the input terminals are strongly supported and insulation is improved.

[Problem that the invention seeks to solve]

In the conventional JP-A-54-8227, the power transistor and other parts constituting the electronic control unit are each attached to a fixed base, so the electronic control unit other than the power transistor is not connected to the power supply. The problem was that the temperature rose due to the heat generated by the transistor, leading to failure.

In addition, in the conventional Utility Model Publication No. 53-68840,
Since the amplification control circuit device is attached to the outer surface of the housing, the distance between the amplification control circuit device and the signal generation member is large, and lead wires are required to connect the amplification control circuit device and the signal generation member. Therefore, there has been a problem in that the assemblability and connection reliability between the amplification control circuit device and the signal generating member and between the amplification control circuit device and external devices are poor.

This invention was made in order to solve the above-mentioned problems, and it is possible to prevent the heat generated by the output amplifying section of the ignition unit from affecting the control section, and also to improve the connection between the ignition unit and the signal generating member, and between the ignition unit and external equipment. An object of the present invention is to provide an engine ignition system which can improve the electrical connection reliability and assembly workability of the engine, and can also provide a connector section for external connection of the ignition unit in a space-saving manner.

[Means for solving problems]

The engine ignition system according to the present invention includes an output amplifying section which is integrally provided with a seat for mounting an ignition unit on a housing, and an output amplifying section that is connected to the seat of the housing, and a housing that is provided in continuation with the amplifying section. It consists of a control part that is not connected to the catch of the housing, and an external connection connector part that is connected to the control part and the output amplification part and is not connected to the catch of the housing. Unit and signal unit are integrally combined,
In addition, the external connection connector portion is extended to the outside of the housing.

[Effect]

In the engine ignition system of this invention, only the output amplifying section of the ignition unit is connected to the seat of the housing, so that the output amplifying section of the ignition unit effectively dissipates heat through the seat of the housing. This prevents the output amplification section from reaching high temperatures, and since the control section and connector section other than the output amplification section are not connected to the housing's seat, the heat dissipated from the output amplification section through the housing is controlled. The high temperature will not be transmitted to the control section or connector section, causing the control section or connector section to reach high temperatures.

In addition, the signal unit and the ignition unit are integrally connected, and the external connection connector part of the ignition unit mounted inside the housing is extended to the outside of the housing, so there is no connection between the ignition unit and the signal unit, and between the ignition unit and the ignition unit. External devices can be connected without lead wires in a space-saving manner.

[Embodiments of the invention]

An embodiment of the present invention shown in FIGS. 1 to 8 will be described below. In each figure, 1 is a housing of a power distribution device, which is molded from aluminum or the like with good heat dissipation, and has a receiving seat 1a having a large area on the inside, and a through hole that passes through the housing 1 in the axial direction and communicates the inside and outside of the housing 1. A hole 1b is formed.
2 is a rotating shaft supported by the housing 1 via a bearing 3; 4 is a cylindrical body loosely fitted to the rotating shaft 2;
Reference numeral 5 denotes a ring-shaped signal rotor fitted into the cylinder 4, and on its outer periphery are formed as many protrusions 5a as the number of engine cylinders (four in this embodiment since the engine has four cylinders). Reference numeral 6 denotes a movable plate which is rotatably supported on the housing 1 around the rotating shaft 1, and a connecting pin 7 is pivotally attached to one place of the movable plate. It is fitted. 10 is a stator fixed on this movable plate 6 via a permanent magnet 11, and includes a protrusion 10a that can face each protrusion 5a of the rotor 5 with a gap therebetween.
Three are formed. 12 is the ignition unit,
This includes a power transistor section 12a, which is an output amplification section, which is joined and fixed to the seat 1a of the housing 1, and a power transistor section 12a that is connected to the power transistor section 12a and is not connected to the seat 1a of the housing 1. A control section 12b, the power transistor section 12a, and a control section 12b.
It has a connector portion 12c located between the housing 1 and protruding outside the housing 1, a pair of mounting holes 12d, and a pair of connection plugs 12e. A signal unit 13 is integrally connected to the ignition unit 12, and includes a bobbin portion 14, a signal coil 15 wound around the bobbin, and a pair of mounting holes 16.
This mounting hole 16 and the mounting hole 12d of the ignition unit 12 are overlapped and fixed with the same bolt. The winding start and winding ends of the signal coil 15 are connected to the input end of the ignition unit 12 via a connection plug 12e. 21 is a cam type governor advance device attached to the tip of the cylinder body 4; 22 is the governor base; 22a is a mounting piece formed at two symmetrical locations on the governor base 22; A half-bowl-shaped power distribution rotor is fixed, 24 is a pair of tightening screws for fixing the power distribution rotor 23 to the mounting piece 22a of the governor base 22, 25 is a rotor electrode fixed to the upper part of the power distribution rotor 23, and one end is located at the center. It can be in sliding contact with the electrode 26, and the other end can face each peripheral electrode 27 in turn. Reference numeral 28 denotes a power distributor cap that is fitted and fixed to the housing 1, and each of the center and peripheral electrodes 26 and 27 are fixed thereto.

Next, to explain the operation of the embodiment in detail, first, when the rotary shaft 2 is rotated in the direction of the arrow by the engine, the cylinder body 4 is rotated via the governor advance device 21, and the signal rotor 5 is rotated. 4 protrusions 5
a approaches each of the three protrusions 10a of the stator 10, faces each other, and approaches each of the three protrusions 10a of the stator 10. Then, due to the rotational movement of the protrusion 5a of the signal rotor 5, the interlinkage magnetic flux from the permanent magnet 11 changes, and a signal voltage corresponding to the rotation speed is generated in the signal coil 16. This signal voltage is input to the input terminal of the ignition unit 12, so that the semiconductor amplifier device in the ignition unit 12 intermittents the primary current of the ignition coil, which is energized through the connector portion 12c, in accordance with the engine ignition timing. Induces ignition voltage on the secondary side. This ignition voltage is guided to the center electrode 26 and the rotating power distribution rotor 2
Power is sequentially distributed to each peripheral electrode 27 through the three rotor electrodes 26 .

Now, the signal unit 13 and the ignition unit 14
In detail, the diameter and depth of the housing 1 are the diameter and axial dimensions of each component installed therein, as well as the engine if the power distributor body is installed on the engine. It has been determined that it will not interfere with auxiliary equipment. Therefore, the ignition unit 12 having a large volume can be accommodated in the current housing 1 without increasing the diameter and depth of the housing 1.
How it is installed inside is extremely important.

Therefore, in the embodiment of the present invention, there is a relatively large space between the signal generator and the governor advance device 21, and in the case of a four-cylinder engine, the number of protrusions 10a on the stator 10 can be reduced from four to three. The ignition unit 12 is installed in this space after confirming that it has almost no adverse effect on the power generation of the signal coil 15.

That is, among the four protrusions 10a of the stator 10,
One protrusion on the side opposite to the link 9 is removed, and an opening seat 1a extending in the axial direction and having a wide area is formed at the bottom of the housing 1 corresponding to the position of this protrusion.

Thus, the signal unit 13 and the ignition unit 12
is inserted into the opening of the housing 1, the signal unit 13 is inserted into the cylindrical body 4, and the housing 1 (not shown) is inserted.
It is positioned at a predetermined position by engaging with the positioning part of. At the same time, the connector part 1 of the ignition unit 12
2c into the through hole 1b of the housing 1, and the power transistor part 12a is inserted into the housing 1.
the catch seat 1a. Also, at this time, the connection plug 12e of the ignition unit 12 is connected to the signal unit 13.
It is fitted into the connection part of. After this, the mounting hole 12d of the ignition unit 12 and the mounting hole 16 of the signal unit 13 are aligned, and a tightening bolt (not shown) is screwed into the threaded hole of the housing 1.
and ignition unit 12 are integrally fixed to housing 1, and the installation work of signal unit 13 and ignition unit 12 is completed.

Note that the present invention is not limited to the above-mentioned embodiments, but includes various embodiments.
For example, in addition to the ignition function, the ignition unit 12 may include an ignition timing control function that receives an ignition signal and automatically advances or retards the engine ignition timing in response to various control signals. In this way, the governor advance device 21 can be abolished. Also,
It can also be applied to a device in which the governor advance device 21 is installed at the bottom. Further, the number of protrusions 10a on the stator 10 is arbitrarily set according to the number of cylinders, and the number of protrusions to be removed is set within a range that does not reduce the accuracy of the ignition signal and in accordance with the installation space of the ignition unit 12. There is a need.

〔Effect of the invention〕

As described above, in this invention, only the output amplifying part of the ignition unit installed inside the housing is configured to be connected to the seat of the housing, so the heat generated by the ignition unit is disposed integrally with the housing. The heat is quickly conducted to the received seat and radiated efficiently from the entire surface of the housing, and the problem of electronic control units excluding the output amplification section rising in temperature due to the heat generated by the output amplification section, which can lead to failure, can be solved. . Although heat is transferred from the ignition unit to the control section and the connector section without going through the housing, most of the heat is dissipated through the housing, so there is no problem of the control section breaking down.
Furthermore, since heat is dissipated inside the housing, there is no problem of failure of the control part. Since the ignition unit and signal unit are integrally connected, there is no need for lead wires to connect the ignition unit and signal unit, which improves the reliability of the electrical connection and also reduces assembly work. Furthermore, by extending the connector part for external connection of the ignition unit installed inside the housing to the outside of the housing, the mounting space for the connector part of the ignition unit can be efficiently set inside the housing. Therefore, a connector section for connection with an external device can be installed in a space-saving manner, which in turn contributes to downsizing of the power distributor.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a plan view showing main parts of the embodiment shown in FIG. 1,
FIG. 3 is a plan view of the ignition unit 12, which is the main part of the embodiment shown in FIG. In the figure, 1 is the housing, 1a is the catch, 1b
is a through hole, 2 is a rotating shaft, 5 is a signal rotor, 5
a, 10a are projections, 10 is a stator, 11 is a permanent magnet, 12 is an ignition unit, 12a is a power transistor section, 12b is a control section, 12c is a connector section, 12d is a mounting hole, 12e is a connection plug, 13 is a signal unit , 14 is a bobbin, 15 is a signal coil, 16 is a mounting hole, 21 is a governor advance device, 22 is a governor plate, 23 is a power distribution rotor,
28 is a cap. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A heat dissipation housing supporting a rotating shaft;
A signal unit installed inside the housing and capable of generating an ignition signal by rotation of the rotating shaft, and an ignition unit installed inside the housing and receiving the ignition signal and generating an ignition voltage in the ignition coil, A seat for mounting the ignition unit is integrally provided in the housing, and the ignition unit is connected to an output amplifying section that is connected to the seat, and an output amplifying section that is connected to the output amplifying section and that is not connected to the seat. It is composed of a control section that is in a connected state, and a connector section for external connection that is connected to the control section and the output amplification section and is not connected to the seat, and the signal unit and the ignition unit are connected to each other. An engine ignition system characterized in that the external connection connector portion and the housing are integrally connected to each other, and the external connection connector portion is extended to the outside of the housing.