JPS627388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an engine ignition system in which a semiconductor amplifier circuit having an ignition function is configured as a single ignition unit, and this unit is built in a power distributor housing.

[Conventional technology]

As a conventional example of this type, there is a known example as disclosed in Japanese Utility Model Publication No. 46-17528, in which a signal generator and an amplifier are integrated in a power distributor housing. Furthermore, as disclosed in Japanese Patent Application Laid-Open No. 50-25944, there is a known device in which a unit consisting of an ignition coil and a unit for controlling the current of the ignition coil are removably attached integrally.

[Problem that the invention seeks to solve]

In the conventional device disclosed in Japanese Utility Model Publication No. 46-17528 mentioned above, the amplifier only amplifies the ignition signal from the signal generator, and since the switch part that constitutes the ignition unit is installed outside the power distribution housing, It is necessary to connect the unit, amplifier, and signal generator with lead wires, which requires time and effort to connect, and also requires care to avoid noise as much as possible when wiring the lead wires. It was hot.

In addition, even in the case of the above-mentioned Japanese Patent Application Laid-open No. 50-25944, the unit consisting of the ignition coil and the unit for controlling the current of the ignition coil are simply attached removably as one unit, so that the ignition signal is generated. The signal unit that controls the ignition coil must be connected to the ignition coil unit or the unit that controls the current of the ignition coil via lead wires, and as with the conventional example described above, there is a problem in the workability of connecting the signal unit and each of the above units. There were also problems such as the need for noise countermeasures due to the wiring of the lead wires.

In addition, because it is necessary to install the governor advance device, vacuum advance device coupling mechanism, signal unit, etc. inside the conventional power distribution device housing, there is only a limited space for installation within the power distribution device housing, especially for large devices. It is difficult to secure space for installing the ignition unit, and since the ignition unit is overused, there is a possibility of it breaking down, so it is conceivable that only the ignition unit needs to be replaced with a new one. is attached to the outside of the power distributor housing, and as mentioned above, there has been a problem with the connection between the signal unit and the ignition unit using lead wires.

This invention has been made to solve such problems, and includes an ignition unit provided in a housing, and an ignition unit and a signal unit that can be removably fixed to the housing in a direction substantially perpendicular to the rotation axis. An object of the present invention is to provide an engine ignition system in which electrical connection between an ignition unit and a signal unit can be easily and reliably made through each terminal, and erroneous connections can be prevented.

[Means for solving problems]

In the engine ignition system according to the present invention, the signal unit is provided with an ignition signal lead-out terminal and a connector terminal that extend in substantially the same direction, and the ignition unit is provided with an ignition signal lead-out terminal and a connector terminal that extend in a direction substantially orthogonal to the rotation axis. An input terminal that is removably fitted and an output terminal that is removably fitted to the connector terminal in a direction substantially perpendicular to the rotation axis are provided, and the ignition unit and signal coil are connected to the housing through the terminals. It is attached so that it can be attached and detached in a direction substantially perpendicular to the axis of rotation.

[Effect]

In this invention, when fixing the ignition unit,
Connect the input terminal to the ignition signal output terminal of the signal unit.
By fitting and connecting the output terminals to the connector terminals of the signal unit, the ignition unit and signal unit can be removably fixed to the housing in a direction substantially perpendicular to the rotation axis, and the electrical connection between the ignition unit and signal coil can be Connections can be made easily and reliably.

〔Example〕

Hereinafter, the embodiment will be described in detail with reference to the embodiments shown in Figs. On the inside, an opening seat 1a having a large area is formed, a pair of protrusions 1b are formed at two approximately symmetrical locations, and screw holes 1c are formed at two locations. 2 is a bearing 3 attached to this housing 1.
4 is a cylindrical body loosely fitted on this cylindrical body 2; 5 is a ring-shaped signal rotor fitted on this cylindrical body 4; on its outer periphery, the number of engine cylinders ( Since this embodiment has four cylinders, only four protrusions 5a are formed. 6 is housing 1
A movable plate is rotatably supported around a rotating shaft 2, and a connecting pin 7 is pivotally attached to one place of the movable plate, and a link 9 of a vacuum advance device 8 is loosely fitted to this connecting pin 7. . A stator 10 is fixed to the movable plate 6 via a permanent magnet 11, and is provided with three protrusions 10a which can face each protrusion 5a of the rotor 5 with a space between them. Reference numeral 12 designates a signal unit fixed to the housing 1, which includes a bobbin portion 12a, a pair of support portions 12c having mounting holes 12b, a pair of connector housing portions 12d extending from these support portions 12c, and a signal unit 12d extending from the housing portions 12d. It has a pair of positioning parts 12e that extend and engage with each protrusion 1b, and a cover part 12f. These, the bobbin part 12a, the mounting hole 12b,
Support part 12c, housing part 12d, positioning part 1
2e is integrally molded from synthetic resin or the like. 14,
15 is fixed to the upper part of the bobbin part 12a of the signal unit 12 so as to extend in a direction substantially perpendicular to the rotating shaft 2, that is, in a radial direction (hereinafter referred to as the radial direction).
16 is a signal coil wound around the bobbin portion 12a of the signal unit 12; The winding end is connected to the winding connector terminal 14, and the winding end is connected to the winding end connector terminal 15. Reference numeral 17 denotes an ignition unit which includes a built-in semiconductor amplifier device (consisting of an integrated circuit or the like) having an ignition circuit function, and is formed with a pair of mounting portions 17b having mounting holes 17a. Reference numeral 18 is formed to protrude radially in one direction from each mounting portion 17b, and is an output terminal led out to the ignition coil. Reference numeral 19 is located at the center of the main body of the ignition unit 17, and is connected to the radial end portion 12g of the signal unit 12. A pair of input terminals are formed to be spaced apart from each other at radial end portions 17c facing each other and project in the same direction as the output terminals 18, and are fitted and connected to each connector terminal 14, 15 of the signal unit 12. 20 is a metal cover for a heat sink partially buried under the ignition unit 17. In addition, the mounting hole 17a mounting part 17
b The terminals 18, 19 and the metal cover 20 are integrally formed when the ignition unit 17 is molded. Further, the mounting portion 17b of the ignition unit 17 is connected to the signal unit 1.
is inserted and fitted into the support portion 12c of No. 2 in the radial direction,
At this time, the output terminal 18 is housed and held in the housing part 12d, and the mounting holes 12b and 17a match,
Moreover, the input terminal 19 is fitted and connected to the connector terminals 14 and 15. A pair of tightening screws 21 fix the ignition unit 17 and the signal unit 12 together to the housing 1, and are screwed into the screw holes 1c of the housing 1 through the respective mounting holes 12b and 17a.
At this time, the lower metal cover 20 of the ignition unit 17 is in contact with the opening seat 1a of the housing 1. A pair of lead wires 22 are connected to connector terminals 23 which are fitted and connected to each output terminal 18 of the ignition unit 17, and are connected to the ignition coil via a grommet 24 fixed to the housing 1. The connector terminals 23 are inserted into each housing portion 12d of the signal unit 12 and held therein. 25 is a cam type governor advance device attached to the tip of the cylinder 4, 26 is its governor base, and 26a is the 2 symmetrical part of this governor base 26.
Screw holes 26b are formed by mounting pieces formed at these locations. Reference numeral 27 denotes a half-bowl-shaped power distribution rotor fixed to the governor base 26, and has an opening 27a formed therein, and the opening 27a is formed in a size large enough to expose the ignition unit 17. A pair of tightening screws 28 fix the power distribution rotor 27 by screwing into the screw holes 26b of the governor base 26;
A rotor electrode 9 is fixed to the upper part of the power distribution rotor 27, one end of which is in sliding contact with the center electrode 30, and the other end of which can face each of the peripheral electrodes 31 in sequence. 32 is a power distributor cap that is fitted and fixed to the housing 1, and each center and peripheral electrodes 30, 31 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 25, and the signal rotor 5 is rotated. 4 protrusions 5
a approaches, faces, and separates from each of the three protrusions 10a of the stator 10. Then, due to the rotational movement of the protrusion 5a of the radial 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 from the winding start and winding end connector terminals 14 and 15 to the input terminal 19 of the ignition unit 17,
Therefore, the semiconductor amplifier in the ignition unit 17 intermittents the primary side current of the ignition coil, which is energized from the lead wire 22 through the connector terminal 23 and the output terminal 18, in accordance with the engine ignition timing, and outputs the ignition voltage on the secondary side. induce. This ignition voltage is applied to the center electrode 3
0, and power is sequentially distributed to each peripheral electrode 31 through the rotor electrode 29 of the rotating power distribution rotor 27.

Now, the signal unit 12 and the ignition unit 17
In detail, the diameter and depth of the housing 1 are the diameter and axial dimensions of each component installed therein, and when the power distributor body is installed on an engine, including the engine. The design is such that it does not interfere with the auxiliary equipment. Therefore, the ignition unit 17 having a large volume can be accommodated in the current housing 1 without increasing the diameter and depth of the housing 1.
How the ignition unit 17 is installed inside the ignition unit is extremely important, and moreover, it must be possible to easily attach and detach the ignition unit 17.

Therefore, in the embodiment of the present invention, there is a relatively large space between the signal generating section and the governor advance device 25, and in the case of a four-cylinder engine, the protrusion 10 of the stator 10
It has been confirmed that even if the number a is reduced from four to three, there is almost no adverse effect on the power generation of the signal coil 16, and the ignition unit 17 is removably mounted in this space.

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 receiving seat 1a having a wide area extending in the axial direction is formed at the bottom of the housing 1 corresponding to the position of this protrusion, and the axial support is provided at two symmetrical locations. A pair of protrusions 1b extending in the direction are formed.

Thus, the signal unit 12 is inserted through the opening of the housing 1, each of its supporting parts 12c is brought into contact with each of the opening seats 1a, and at the same time each positioning part 12e is engaged between the pair of protrusions 1b. Hold. and,
Connector terminals 23 from the ignition coil are inserted into each housing portion 12d of the signal unit 12 and held therein. Next, the ignition unit 17 is inserted in the radial direction from the opening of the housing 1, and at this time, its mounting portion 17b is inserted into each support portion 1 of the signal unit 12.
2c, and the metal cover 20 of the ignition unit 17 is held in contact with the opening seat 1a of the housing 1. At this time, the input terminal 19 of the ignition unit 17 is connected to the signal unit 1.
are fitted and connected to each of the connector terminals 14 and 15 of 2,
At the same time, the output terminal 18 is connected to each connector housing part 1.
It is fitted and connected to the connector terminal 23 inside 2b. Therefore, the electrical connection between the ignition unit 17 and the signal unit 12 is ensured.

Then, the support part 12c of the signal unit 12
and each mounting hole 1 of the mounting portion 17b of the ignition unit 17.
2b and 17a match, each mounting hole 1
Insert the tightening screws 21 from 2b and 17a and screw them into the screw holes 1c of the housing 1 to complete the signal unit 1.
2 and the ignition unit 17 are integrally fixed to the housing 1, and the assembly of the signal unit 12 and the ignition unit 17 is completed.

By the way, since the ignition unit 17 is overused, there is a possibility of it breaking down, and in this case, the ignition unit 17
It is necessary to replace only with a new one.

The major feature here is that the ignition unit 17 can be easily removed without removing the governor advance device 25 and the power distribution rotor 27.

That is, the power distribution rotor 27 is rotated artificially, the tightening screw 21 is exposed from the opening 27a, and the tightening screw 21 is loosened and removed using a screwdriver, and then the ignition unit 1 is removed.
7 in the direction of the arrow shown in FIG.
2 and is removed from the housing 1. Therefore, in order to install a new ignition unit 17, the order of removal work is reversed.
That is, insert the ignition unit 17 in the opposite direction of the arrow,
The mounting portion 17b is attached to the support portion 1 of the signal unit 12.
2c, and the ignition unit 17 and signal unit 12 are integrally fixed to the housing 1 with the tightening screw 21.

During the installation and removal work of the ignition unit 17, the signal unit 12 moves because the positioning part 12e of its support part 12c is engaged between the protrusions 1b of the housing 1 even if it is removed by loosening the tightening screw 21. Therefore, the ignition unit 17 can be installed and removed smoothly.

As described above, in this embodiment, among the four protrusions 10a of the stator 10 formed for the same number of engine cylinders, the protrusion located on the side opposite to the link 9 is deleted to form a space, and a large space is formed in this space. By installing the ignition unit 17 having a volume of Since the metal cover 20 is fixed in contact with the ignition unit 17, the heat generated by the ignition unit 17 is transferred to the metal cover 2.
The heat is quickly conducted from the heat source 0 to the housing 1 via the opening seat 1a, and can be efficiently radiated from the entire surface of the housing 1, allowing the ignition unit 17 to operate stably over a long period of time.

Moreover, since the ignition unit 17 is fixed to the opening seat 1a of the housing 1,
The ignition unit 17 can be easily attached and detached without removing the governor advance device 25 and the power distribution rotor 27. In connection with this attachment/detachment, the mounting portion 17b, input terminal 19, and output terminal 18 of the ignition unit 17 are aligned in the same direction with respect to the rotating shaft 2, and the support portion 12c of the signal unit 12 and the connector terminals 14, 15 are aligned. Each of them is aligned in the same direction as described above, so when installing the ignition unit 17 in the housing 1, insert the ignition unit 17 from the radial direction and fit the mounting portion 17b into the support portion 12c of the signal unit 12. each radial end 1
2g and 17c, the input terminal 19 will automatically fit into the connector terminals 14 and 15, and therefore the signal unit 12 and the ignition unit 17 will be connected to each other.
The electrical connection can be easily and reliably made, and erroneous connections can be prevented. Furthermore, lead wires with poor reliability can be eliminated.

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 17 may also 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 25 can be abolished. Also,
It can also be applied to a device in which the governor advance device 25 is installed at the bottom. Further, the number of protrusions 10a of the stator 10 is arbitrarily set according to the number of cylinders, and the number of protrusions to be removed at this time 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 17. There is a need to.

〔Effect of the invention〕

As described above, in the case where the ignition unit is built into the housing, the present invention provides the signal unit with the following features:
An input terminal is provided with an ignition signal lead-out terminal and a connector terminal each extending in substantially the same direction, and is removably fitted to the ignition signal lead-out terminal of the signal unit in a direction substantially perpendicular to the rotation axis. and,
An output terminal is provided that is removably fitted to the connector terminal of the signal unit in a direction substantially perpendicular to the rotation axis, and the ignition unit and the signal unit are connected to the housing through the terminals so as to be connected to the housing substantially perpendicular to the rotation axis. Since the ignition unit is attached removably in both directions, when the ignition unit is fixed, the input terminal is connected to the ignition signal lead-out terminal of the signal unit, and its output terminal is connected to the connector terminal of the signal unit by fitting and connecting the ignition unit. Since the unit can be removably fixed to the housing in a direction approximately perpendicular to the rotation axis,
When replacing the ignition unit with a new one in the event of a failure, it can be done smoothly without interfering with other devices in the housing, and the space required for close contact can be reduced. No. 17528/1983 and 25944/1987, no lead wires are required at all, so the electrical connection between them can be easily and reliably made, erroneous connections can be prevented, and the ignition unit can be connected to the housing. It has practical effects, such as being easily attachable and detachable, and requiring no noise countermeasures.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of essential parts showing an embodiment of the present invention, FIG. 2 is a plan view showing how the signal unit 12 and ignition unit 17 are installed, and FIG. 3 is a plan view showing how the distribution rotor 27 is installed. 4 is a plan view showing the inside of the housing 1, FIG. 5 is a perspective view of the signal unit 12 and the ignition unit 17, and FIG. 6 is a plan view of the main part of the signal unit 12. In the figure, 1 is the housing, 1a is the opening catch,
1b is a projection, 1c is a screw hole, 2 is a rotating shaft, 3 is a bearing, 4 is a cylinder, 5 is a signal rotor, 5a, 10
a is a projection, 6 is a movable plate, 7 is a pin, 9 is a link, 10 is a stator, 11 is a permanent magnet, 12 is a signal unit, 12a is a bobbin part, 12b, 17
a is a mounting hole, 12c is a support part, 12d is a housing part, 12e is a positioning part, 12f is a cover part, 1
2g and 17c are radial ends, 20 is a metal cover,
14, 15, 23 are connector terminals, 16 is a signal coil, 17 is an ignition unit, 17b is a mounting part, 1
8 is an output terminal, 19 is an input terminal, 21 is a tightening screw, 25 is a governor advance device, 26 is a governor base, 27 is a power distribution rotor, 27a is an opening, and 32 is a cap. Note that the same reference numerals in each figure indicate the same parts.

Claims (1)

[Claims] 1. A cylindrical housing supporting a rotating shaft;
A signal unit fixed in the housing and having a cylindrical shape so as to generate an ignition signal by rotation of the rotating shaft; and a signal unit provided inside the housing and receiving the ignition signal from the signal unit to generate a primary current of the ignition coil. and an ignition unit that induces an ignition voltage on its secondary side by intermittent ignition, wherein the signal unit is provided with an ignition signal lead-out terminal and a connector terminal, each extending in substantially the same direction, The ignition signal deriving terminal is an input terminal that is removably fitted in a direction substantially perpendicular to the rotation axis, and the connector terminal connected to the ignition coil is a direction substantially perpendicular to the rotation axis. and an output terminal that is removably fitted to the housing and extends in substantially the same direction, and the ignition unit and the signal unit are connected to the housing via the respective terminals so as to be substantially orthogonal to the rotation axis. An engine ignition system characterized in that it is installed so as to be detachable in both directions.