JPH0240868B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a non-contact ignition device for an internal combustion engine equipped with a multi-purpose generator, and particularly simplifies the configuration by using the generator coil as both an ignition coil and a load coil. The present invention also relates to a device that is low-cost, easy to manufacture, and capable of supplying required power to a plurality of loads each requiring different power.

Today, chainsaws, lawn mowers, or
Magnet generator type non-contact ignition devices are also widely used in internal combustion engines of special vehicles such as wheeled vehicles. This method uses a magnet generator as the ignition power source for the internal combustion engine ignition system, instead of relying only on the battery.The low-voltage current generated by the magnet generator is taken out to the outside and is then connected to the ignition coil. The voltage is increased and sent to the spark plug, which generates a spark.

However, in an ignition device that employs such an ignition method, for example, the handle of a chain saw is heated by heating a nichrome wire, etc., and the hand of the worker holding the handle is warmed to improve blood circulation. In order to prevent workers from getting white wax, it is necessary to separately install power generation equipment such as a heat source generator that is different from the ignition power generation equipment. As a result, rotors and generator coils for the ignition system and generator are prepared separately, which increases the overall weight of the chain saw and requires a large amount of space to install each generator coil. It was hot. Particularly in the case of hand-held devices such as chain saws, there is a strong demand for reductions in weight and size.

The present invention has been made in order to meet the above-mentioned request, and by sharing the power generation coil as an ignition coil and a load coil, it is possible to supply voltage and current to the load and the ignition circuit, and Non-contact ignition for internal combustion engines that simplifies the configuration, reduces the cost and weight of the ignition system, is easy to manufacture, and can supply the required power to multiple loads with different power requirements. The purpose is to provide equipment.

Therefore, in the present invention, a plurality of power generation magnets are arranged in parallel at predetermined intervals on the inner circumference of the ring-shaped rotor that rotates in synchronization with the rotation of the crankshaft for an internal combustion engine. A fixed part iron core having a plurality of radially protruding coil cores facing these power generation magnets at a predetermined gap is provided in the ring hole of the ring-shaped rotor, and an ignition coil is attached to the plurality of coil cores. and a power generation coil that also serves as a load coil, and these power generation coils are connected in series to form an integrated structure, and a distribution circuit is installed at both ends of the power generation coil to distribute the electric power induced therein to the ignition circuit and the load circuit. connection,
Further, a trigger magnet is disposed on the ring-shaped rotor, and a trigger coil is wound around the outer periphery of the ring-shaped rotor facing the trigger magnet for supplying a trigger signal to the ignition circuit. The structure was designed to include a steel core.

Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a non-contact ignition device for an internal combustion engine according to the present invention. Reference numeral 1 denotes a ring-shaped rotor made of synthetic resin or aluminum die-casting, and a trigger magnet is attached to the outer periphery of the rotor 1. A pair of pole pieces 3 are provided at both ends of the rotor 1, and their tips are embedded in the rotor 1 so as to be flush with the outer peripheral surface of the rotor 1. Further, a U-shaped or T-shaped trigger iron core 5 around which a trigger coil 4 is wound is arranged at a portion facing the outer periphery of the rotor 1 . That is, in the case of the embodiment shown in the drawings, the trigger coil 4 faces the trigger magnet 2 via the pole piece 3. Further, the pair of pole pieces 3 are arranged at a predetermined distance that determines the ignition timing of the internal combustion engine, and the pair of pole pieces 3 are arranged at a predetermined distance to determine the ignition timing of the internal combustion engine.
, a trigger signal is induced in the trigger coil 4 via the trigger magnet 5 by the rotation of the trigger coil 4 . This induced pulse-like trigger signal is input to an ignition circuit, which will be described later, and is waveform-shaped to control the output timing of the ignition voltage.

On the other hand, a plurality of power generation magnets 6 are installed on the inner circumferential side of the rotor 1 so that they can rotate together. A fixed part iron core 7 is provided in the ring hole, and a power generation coil 9 is wound around a plurality of coil cores 8 integrally and radially protruding from this iron core 7, and each of these power generation coils 9 is connected in series. It has an integrated structure and is connected to a distribution circuit 10 which is an external circuit. In addition, in the above, 11 is a lead wire connecting the 9 ends of each coil,
The function of a flywheel rotor can be imparted to the rotor 1 by attaching a predetermined heavy material or by configuring the rotor itself from a heavy material. 12 is a balance weight.

The distribution circuit 10 distributes the induced voltage obtained in the generator coil 9 to a load circuit 18 via an ignition circuit 13, a load circuit 14, and a rectifier 17.
The ignition circuit 13 is provided with a well-known electromotive force charging/discharging circuit, etc., and the ignition coil 15 is activated based on the trigger pulse from the trigger coil 4.
The ignition voltage is discharged at a predetermined timing. 16 is ignition coil 15
This is the spark plug connected to.

As already mentioned, the DC load circuit 18 is connected to the distribution circuit 10 via the rectifier 17, and the switches 19 and 20 connected between the rectifier 17 and the load circuit 14 and the distribution circuit 10 can be freely operated. By opening and closing the load circuit 1
4 and 18 can be selectively supplied with power.

Next, the operation of the non-contact ignition circuit having such a configuration will be described.

First, the crankshaft of the internal combustion engine rotates, and in synchronization with this, the rotor 1 rotates, causing the trigger magnet, pole piece 3, and power generation magnet 6 to rotate.
rotates integrally with this rotor 1. Therefore, a timing signal for supplying the ignition voltage to the ignition coil 15 is outputted to the trigger coil 4 as a pulse signal. On the other hand, as the power generation magnet 6 rotates, an induced voltage is obtained in each power generation coil 9, and since the power generation coils 9 are connected in series, this voltage is added to each other and input into the distribution circuit 10. In other words, each power generation coil 9 forms a single coil as a whole, and this single coil performs a single electrical and magnetic operation to output a single AC power, which is then connected to the distribution circuit. 1
0 is input. The distribution circuit 10 distributes and supplies voltage at a predetermined level to the ignition circuit 13 and load circuits 14 and 18 at a predetermined ratio.

The voltage thus distributed and applied to the ignition circuit 13 is increased to a predetermined voltage, and is input to the ignition coil 15 at a predetermined timing based on the trigger signal from the trigger coil 4, and is then applied to the secondary A spark plug connected to the side generates a spark, which combusts the air-fuel mixture in the engine combustion chamber.

At the same time, when the switch 19 is OFF (open), the distribution circuit 10 supplies the desired AC power for the load to the load circuit 14, allowing the heater and other loads such as the load to be operated. Next, when the switch 19 is turned on (closed), power is no longer supplied to the load circuit 14.

Further, when the switch 20 is turned ON (closed), DC power is supplied from the distributor 10 to the load circuit 18 via the rectifier 17. Further, when the switch 20 is turned off (opened), no power is supplied to the load circuit 18.

Note that when the switch 20 is turned OFF (open), the load circuit 18 is connected to the rectifier 17 and receives DC power, so that it is possible to operate a DC motor and other DC loads. Note that the rectifier 17 can also be integrated into the distribution circuit 10. Furthermore, switch 19, switch 2
Since 0 is not linked, it can be selected freely.

As described above, the present invention can be operated with a simple structure without using a separate power generation means such as a heater for warming the handle of the chain saw or the power source of the battery itself.

Further, in the present invention, a ring-shaped rotor 1 is used, a plurality of power generation magnets 6 are arranged in parallel at predetermined intervals in the circumferential direction on the inner periphery, and a fixed part having a plurality of coil cores 8 protruding radially. The iron core 7 is provided in the ring hole of the ring-shaped rotor 1, the plurality of coil cores 8 are each wound with a power generation coil 9 which serves as an ignition coil and a load coil, and these power generation coils 9 are connected in series. Because of the integrated structure, it is possible to supply sufficient power to the load circuit 14 to drive it, although it is possible to achieve miniaturization.

Furthermore, in the present invention, the plurality of coil cores 8
The generator coils 9, which also serve as ignition coils and load coils, are wound around the coils, and these generator coils 9 are connected in series to form an integrated structure. It is only necessary to wind the coil around the coil core 8, and since a plurality of coils with different winding specifications are not wound, the manufacturing process does not require any trouble.

Furthermore, in the present invention, since the distribution circuit 10 is provided, it is also possible to supply the required power to a plurality of loads each having a different power requirement.

As explained in detail above, according to the present invention,
A ring-shaped rotor that rotates in synchronization with the rotation of a crankshaft for an internal combustion engine has a plurality of power generation magnets arranged in parallel at predetermined intervals circumferentially around the inner circumference of the rotor, and these power generation magnets A fixed part iron core having a plurality of radially protruding coil cores facing each other with a predetermined gap is provided in the ring hole of the ring-shaped rotor, and the plurality of coil cores serve as both an ignition coil and a load coil for power generation. The coils are wound respectively, and each of the generating coils is connected in series to form an integral structure, and a distribution circuit for distributing the electric power induced therein to an ignition circuit and a load circuit is connected to both ends of the coil, and the ring-shaped rotor is connected to the ring-shaped rotor. A trigger magnet is disposed at the ring-shaped rotor, and a trigger iron core is disposed around the outer periphery of the ring-shaped rotor opposite to the trigger magnet, and a trigger iron core is wound around a trigger coil that supplies a trigger signal to the ignition circuit. By doing so, the power generation coil can be used in common as a coil for engine ignition and other loads, and power can be obtained more efficiently, resulting in a smaller and simpler configuration, and also reduces manufacturing costs. It is also possible to easily supply the required power to a plurality of loads each having different power requirements, and is extremely effective in practice as a multipurpose generator for a chain saw or other equipment having a engine.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a non-contact ignition device of the present invention. 1...Rotor, 6...Power generation magnet, 9...Generation coil, 10...Distribution circuit, 13...Ignition circuit,
14, 18...load circuit, 15...ignition coil, 16...spark plug, 17...rectifier.

Claims (1)

[Claims] 1 A ring-shaped rotor that rotates in synchronization with the rotation of a crankshaft for an internal combustion engine has a plurality of power generation magnets arranged in parallel at predetermined intervals circumferentially on the inner circumference of the rotor, and these power generation magnets A fixed part iron core having a plurality of radially protruding coil cores facing each other at a predetermined interval is provided in the ring hole of the ring-shaped rotor, and the plurality of coil cores serve as both an ignition coil and a load coil. Each of the generating coils is wound around the generating coil, and these generating coils are connected in series to form an integral structure, and a distribution circuit for distributing the electric power induced therein to the ignition circuit and the load circuit is connected to both ends of the coil, and the ring-shaped A trigger magnet is disposed on the rotor, and a trigger iron core around which a trigger coil for supplying a trigger signal to the ignition circuit is wound is provided around the outer periphery of the ring-shaped rotor, facing the trigger magnet. A non-contact ignition device for an internal combustion engine, characterized in that: