JPS59134378A - No-contact ignition device for magnet-generator type internal-combustion engine - Google Patents

Abstract

PURPOSE:To prevent reversing at starting by providing a preventive circuit from reversing to control the transmission from an angle position sensor of a fixed ignition angle signal to a control circuit of ignition timing in response to the detection signal to detect the operation of a rating voltages switching element of a regulator circuit. CONSTITUTION:It is noted that the relative angle position generated by the output voltage of a condenser-charging coil 1a and an output signal from a sensor 2 is different between times of normal and reversing revolutions. The logical product between a toward-negative output signal of a sensor 2 that can be an ignition signal at starting and an output voltage to operate a regulator circuit 400 among the toward-negative output voltage of a condenser-charging coil 1a is taken,and when the result is No, it is judged as reversing to check the ignition by a preventive circuit from reversing. This construction prevents reversing at starting.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a non-contact ignition device for an internal combustion engine using a magnet generator as a power source, and in particular to a non-contact ignition device for an internal combustion engine that uses a magnet generator as a power source. Related to non-contact ignition devices for engines. In the following description, the internal combustion engine will be abbreviated as engine.

Conventionally, a non-contact ignition device that uses a magnetic hole as a power source driven by an engine generally operates at an advanced fixed ignition angle θ□ and a delayed fixed ignition angle θ1 of the engine, as shown in FIG. The sensor output voltage signals V and Lyal output by the crank rotation angle sensors are used as ignition reference signals, and these voltage signals are applied to the ignition timing control circuit (shown as block 100 in Figs. 1, 5, and 7). ), calculates the ignition advance angle as a reference, and sends the ignition signal as an output signal to the ignition control circuit.Furthermore, within the ignition timing control circuit, the advance angle is The charging action of the charging/discharging capacitor to generate the sawtooth wave for setting is delayed and the fixed ignition angle θ
It starts in synchronization with the voltage generated at , . However, normally, when the engine starts, the output of the ignition signal from the ignition timing control circuit is also delayed and fixed at the ignition angle θ,
It is planned to be carried out in

In the conventional non-contact ignition system for a magnet generator type engine having the above-mentioned configuration, if the engine is reversed at startup, the temperature will advance and the fixed ignition will start as shown in Figure 4. Near the angle θ, a voltage signal v□′ of the same polarity corresponding to the voltage signal ■ during forward rotation is generated, so the ignition timing control circuit operates in response to this voltage signal vH′ and controls the ignition signal. The power is output, ignition is performed, and the engine continues to be reversed. When such an abnormal operation of the engine occurs, there is a problem in that the so-called Ketchen phenomenon 7 occurs, and it also has an undesirable adverse effect on members that interlock with the crankshaft of the engine. The present invention has been made with the intention of overcoming the drawbacks of such conventional devices.

In order to prevent reverse rotation that occurs when starting an engine, the ignition timing control circuit of a non-contact ignition device for a magnet generator type engine is connected in parallel to the power supply input side of the power supply circuit, and the magnet generator is connected in parallel to the power supply input side of the power supply circuit. A regulator circuit including a constant voltage control switching element 2 that responds to the application of a polar voltage for power supply to the power supply circuit generated by the coil, and an output of an angular position sensor that generates a fixed ignition angle signal representing a predetermined rotational angular position of the engine. An angular position sensor for a fixed ignition angle summer signal is connected to the signal input terminal of the ignition timing control circuit in response to a detection signal that detects the operation of the constant voltage switching element of the regulator circuit. It is an object of the present invention to provide a non-contact ignition device for a magnet generator type engine, which is equipped with a reverse rotation prevention circuit that controls transmission Bi and χ.

The non-contact ignition device for a magnet generator type engine of the present invention has the excellent effect of performing normal ignition timing control when the engine rotates in the normal direction, and reliably and stably preventing the generation of an ignition signal when the engine is rotating in the reverse direction. It will be done.

Hereinafter, the present invention will be described with reference to several embodiments with reference to the accompanying drawings. The advantages and effects obtained in each embodiment will become clear along with the description of each embodiment.

Referring to FIG. 1, the non-contact ignition device according to the first embodiment of the present invention includes a capacitor charging coil 1a and a magnet generator 1 provided with an inductor 1b having a length corresponding to the advancing angle on the outer periphery of the Rohme. The ignition timing control device 4 includes an angular position sensor 2 installed to face the inductor 1b, an ignition timing control device 4, and an ignition coil 3. The ignition timing control device 4 includes an ignition timing control circuit 100 and a reverse rotation prevention circuit 200. and power supply circuit 3
00, a regulator circuit 400, an ignition capacitor 9, rectifier diodes 5, 6.7, and a switching element (hereinafter referred to as 80R) 8 for discharging the charge of the ignition capacitor 9.

The ignition timing control circuit 100 is a circuit for realizing the ignition timing characteristics as shown in FIG. 2, but detailed explanation thereof will be omitted. Characterize the reference signal ignition timing on the output signal VH2VL signal N base signal generated by the sensor 2 at the angular positions of advance and delay fixed ignition angles θyo and θ1, respectively,
It is configured to trigger 5OR8.

The power supply circuit 300 includes a rectifier diode 31 and a capacitor 3.
2. The resistor 33 and the constant voltage diode 34 are connected to each other, and the negative output voltage of the capacitor charging coil 1a does not affect the charging of the ignition capacitor 9. 2 charges are stored in the capacitor 32, and the ignition timing control circuit 100 is charged. It is configured to be able to supply a constant voltage power supply voltage.

A regulator circuit 400 is connected in parallel with the power supply circuit 300, and the regulator circuit 400 includes a constant voltage diode 10, a resistor 11, and a constant voltage control switching element (
12 (herein referred to as SOR) and a resistor 13 for detecting the operating state of 5OR12;
3 is connected between the cathode of EIOR 12 and ground.

Furthermore, a reverse rotation prevention circuit 200, which is a feature of the configuration of the device of the present invention, is connected between the angular position sensor 2 and the input terminal (a) of the ignition timing control circuit 1000. The reversal prevention circuit 200 consists of resistors 14°15.16.17.21 and P
NP) transistor 19, NPN) transistor 20,
It is composed of a diode 18. The anode of the diode 18 is connected to the output terminal of the sensor 2, its cathode is connected to the input terminal (A) of the ignition timing control circuit 1000, and the emitter collector circuit of the NPN transistor 20 is connected to the diode 18 and the cutting board row. ,NPN)
The emitter of the transistor 20 is connected to the anode of the diode 18, and the collector thereof is connected to the cathode of the diode 18. Further, the base of the PNP transistor 19 is grounded, the collector thereof is connected to the base of the NPN transistor 200 via the resistor 16, and the PNP transistor 19 is grounded.
The emitter of the resistor 9 is connected to the +90R12 cathode of the resistor 13, which is used to detect the operating state of the EIOR 12 of the regulator circuit 400, through the resistor 14.

The present invention focuses on the fact that the relative angular position at which the output voltage of the capacitor charging coil 1a and the output signal from the sensor 2 are generated differs between forward rotation and reverse rotation, and is shown in FIG. As shown, a logical product (hereinafter referred to as AND The output voltage of the capacitor charging coil 1a and the output signal of the sensor 2 are generated so that the above AND condition is satisfied during forward rotation and the above AND condition cannot be satisfied during reverse rotation. Set the angle position to be rotated and reverse rotation prevention circuit 20
0, during forward rotation, the negative direction output signal of sensor 2 is input to the ignition timing control circuit 1oo and ignition is performed, and during idle rotation, the negative direction output signal of sensor 2 is not input and ignition is prevented. It is an object of the present invention to provide a non-contact ignition device having a structure 7.

Hereinafter, the functions of each part of the device of the present invention will be explained with reference to the accompanying drawings.

The positive direction output of the capacitor charging coil 1a of the generator 1 is
Diode 7, capacitor 9, ignition coil 30
The capacitor 9 is charged via the primary coil and the diode 6V, and on the other hand, the negative direction of the capacitor charging coil 1a is charged via the power supply circuit 300, the diode 5, and the temperature, and the capacitor 32 of the power supply circuit 300 is charged. , ignition timing control circuit 1o.

supply power to the The output of sensor 2 is connected to reverse rotation prevention circuit 20
Since the temperature is sent to the input terminal (a) of the ignition timing control circuit 1oo, the ignition timing control circuit 1tlO uses the positive, output power signals of the sensor 2, vLya' as reference signals, as shown in FIG. As shown above, from the time of starting to the advance start rotational speed N1, the ignition signal is generated at the rotational angle position determined only by the VL multiplication signal, and at the rotational speed of N1 or higher, the ignition signal is determined by the VH1vL signal and the rotational speed. Generates an ignition signal to trigger 5cR8 at the rotational angular position. When triggered by the ignition signal from the ignition timing control circuit 100, S (
3R8 instantly discharges the charge stored in the capacitor 9 through the primary coil of the ignition coil 3, and a high voltage sound is generated across the secondary coil of the ignition coil 30.

FIG. 6 is a time chart for explaining the action Z of the non-contact ignition device according to the present invention when the engine rotates in the normal direction, and FIG. 4 shows the action Z when the engine rotates in the reverse direction. In FIGS. 3 and 4, the no-load voltage waveforms generated by the capacitor charging coil 1aK during forward and reverse rotation of the engine are output with completely opposite phases to each other as shown by va. In the operating state of the ignition system, the positive and negative outputs of the capacitor charging coil 1a have different circuit loads and a current phase lag, and the output current 1 has a current waveform 1 shown in FIGS. 6 and 4. In both forward and reverse rotations, the positive direction output current angle is θ6, and the negative direction output current is θ during the acid flow angle, resulting in waveforms with widely different duty ratios. Due to the negative direction output voltage vb of the capacitor charging coil 1a, the power supply circuit 30
The G capacitor 32 is charged and the terminal voltage rises, and when it reaches a certain level, the 5OR12 of the regulator circuit 400 becomes conductive, so the negative direction output Z resistor of the capacitor charging coil 1a is connected so as to bypass the power supply circuit. Short circuit through 13. The voltage across the resistor 130 that detects the operating state of the regulator control element 5 (3R12) is as shown in FIGS. 6 and 4. During forward rotation, the output voltage va of the capacitor charging coil 1a and the sensor 2 As shown in FIG. 6, the relative angular position at which the output voltage of the sensor 2 is generated is the positive value of the sensor 2 at the advanced fixed ignition angle θ with the advanced angle peak θF of the ignition timing, and at the angular position of the delayed fixed ignition angle θ1. and a negative output voltage VHI VL are generated, and the sensor negative direction output voltage 1 is set to be generated within the operating angle range 08 of 5OR12 of the regulator circuit 400. Reverse prevention circuit 2000P N P
,) Lanzostar 19 is the EI of the Raynire circuit 400.
When OR12 is in operation, the pace current is supplied through resistor 14, so it is in a conductive state, and if sensor negative direction output voltage vL occurs during this time, PN
P) From the collector of run disk 19 through resistor 16, N
Since the pace current is supplied to the PN) transistor 20, the NPN) transistor 20 becomes conductive, and the sensor negative direction output voltage signal vL is supplied to the ignition timing control circuit 100, which can generate an ignition signal.

However, during reverse rotation, as shown in Fig. 4, the output voltage va1 of the capacitor charging coil 1a and the sensor output voltage are in opposite phases, and during forward rotation, the sensor positive direction output 'sea pressure signal ■□ is generated at the angular position θ. During reverse rotation, a sensor negative direction output voltage signal V□' is generated at the corner position θ6. However, at the time of reverse rotation, is the sensor negative direction output voltage signal vH? 5OR12 of the regulator circuit 400 is not operating at the angle where .
Since H' is not supplied to the ignition timing control circuit 100 and therefore the ignition timing control circuit 100 cannot begin its control operations, no ignition signal is generated.

Capacitor charging coil 1 explained in FIGS. 6 and 4
The relative angular position at which the output voltage of a and the output voltage of the sensor 2 are generated is such that during reverse rotation, the sensor negative direction output voltage V□' is generated in the angular region θ of the positive direction output current from the capacitor charging coil 1a. This is the case where seven angle settings have been made. Further, the allowable advance angle peak for normal ignition during forward rotation is θ in FIG. The following is true. However, as in the device of the present invention, the conditions for normal ignition during normal rotation are the angular position of the sensor negative direction output voltage vH' and the regulator circuit within the angular range θ3 of the negative direction output current of the capacitor charging coil 1a. 400 5OR12 operating angle range θ8
When taking the logical product with is obtained.

The first embodiment of the present invention described with reference to FIG.
As shown in the figure, sensor 2 advances to a fixed ignition angle position θ
Although the case has been described in which the positive direction output voltage signal vH is generated at the fixed delayed ignition angle position θ1, and the negative direction output voltage signal L is generated at the delayed fixed ignition angle position θ1, the configuration of the device of the present invention is not limited to such a configuration. Even if the polarity of the output voltage signal of the sensor 2 is reversed as shown in FIG. 6, the configuration as in the second embodiment of the present invention shown in FIG.
Effects similar to those of the first embodiment described above can be obtained.

The difference between the configuration of the second embodiment shown in FIG. 5 and the configuration of the first embodiment is that the reverse prevention circuit 2000PNP) transistor 1
9 is the NPN of the reversal prevention circuit 200') transistor 19
', the former's NPN) transistor 20 is the latter's PNP
) Replaced with Lanzostar 20', its connection is by changing the direction of the former diode 18, connecting its cathode to the output terminal of the sensor 2, and connecting the anode to the input terminal (a) of the ignition timing control circuit 1000, and connecting the same diode 18 The emitter of the PNP transistor 20' is connected to the cathode of the diode 18, its collector is connected to the anode of the diode 18, and its base is connected to the N
PN) Connected to the collector of transistor 19'.

In addition, the emitter of NPN) transistor 19' is grounded,
The pace is connected via a resistor 14 to a terminal (A) of a resistor 13 for detecting the operating state of the regulator circuit 400.

The operation of the second embodiment of the present invention having the above configuration is the same as the first embodiment except that the output voltage of the sensor 2 to be controlled is a positive voltage or a negative voltage.

Furthermore, in the first and second embodiments described above, the reverse rotation prevention circuits 200 and 200' are the supply path for the output signal from the sensor 2 in one direction to the ignition timing control circuit 100, and the forward rotation of the engine. Although the configuration of the device of the present invention is controlled to be conductive and disconnected during reverse rotation and reverse rotation, the configuration of the device of the present invention is not limited to such a configuration. Now, if the output signal of the polarity sensor 2 shown in FIG.
0", resistors 14, 15 and 21', NPN) transistor 19', and reverse voltage protection diode 22,
A similar effect can be obtained by controlling the output voltage signal of the sensor 2 to be supplied to the ignition timing control circuit 100 or bypassed. However, in the case of this sixth embodiment, the relative angular position where the output voltage of the capacitor charging coil 1a and the output voltage of the sensor 2 are generated is, as shown in FIGS. 8 and 9, during normal rotation. , 5OR of regulator circuit 400
In the angular range θ9 where 12 is not operating, a positive direction output voltage signal vL from the sensor 2 is generated at the delayed fixed ignition angle position θ1, and during reverse rotation, the regulator circuit 4
In the angular region θ2 where 5OR12 of 00 is operating,
It must be set so that the positive direction output voltage signal ■HI from the sensor 2 is generated at the advanced fixed ignition angle position θyo.

Furthermore, the device of the present invention limits the number of signal generating devices (e.g., the number of sensors, the number of inductors, etc.) and the number of angle signals generated at a given crank angle position in synchronization with engine rotation. It's not a thing. Although the control in the embodiment of the present invention described above has been explained as having the purpose of causing a misfire during reverse rotation, the purpose of the device of the present invention is not limited to this, and the purpose of the control in the embodiment of the present invention is to prevent unnecessary angle signals (noise signals It is also effective as a means of erasing information (including

[Brief explanation of the drawing]

FIG. 1 is a schematic electrical circuit diagram of a magnet generator type non-contact ignition device according to a first embodiment of the present invention. FIG. 2 is a characteristic diagram showing the relationship between the ignition advance characteristic of a general magnet generator type non-contact ignition device and the advance and delay fixed ignition angle positions output from the angular position sensor. 6 is a waveform diagram of electrical signals at various parts of the magnetic generator type non-contact ignition system according to the first embodiment of the present invention shown in FIG. 1 during normal rotation of the engine, and FIG. FIG. 4 is a diagram of electrical signal waveforms at various parts during reverse rotation. FIG. 5 is a schematic electrical circuit diagram corresponding to FIG. 1 of a second embodiment of the present invention in which the polarities of the advanced and delayed fixed ignition angle positions output by the angular position sensor are reversed. FIG. 6 is a characteristic diagram corresponding to FIG. 2 when the polarities of the advanced and delayed fixed ignition angle signals output from the angular position sensor are reversed. FIG. 7 is a schematic electrical circuit diagram of a magnet generator type non-contact ignition device according to a sixth embodiment of the present invention. FIG. 8 is an electric signal waveform diagram of each part of the magnet generator type non-contact ignition system according to the third embodiment of the present invention shown in FIG. 7 when the engine is rotating in the normal direction, and FIG. FIG. (Explanation of symbols) 1... Magnet generator, 1a... Capacitor charging coil, 1b... Inductor, 2... Angular position sensor, 3...
・Ignition coil, 4...Ignition timing control device, 8
... Switching element (SOR), 9... Ignition capacitor, 12... Constant voltage control switching element (SOR) in the regulator circuit, 100... Ignition timing control circuit, 200.200', 200" ... Reversal prevention circuit, 300 ... Power supply circuit, 400 ... Regulator circuit.

Claims (3)

[Claims] (1) A non-contact ignition device for a magnet generator-type internal combustion engine, which includes an angular position sensor that detects at least one crank rotation angle position ftY and outputs a fixed ignition angle signal, and a primary of the ignition coil. Controls flow interruption1￥
an ignition control circuit for inputting a fixed ignition angle V<= from a sensor, and an ignition timing control circuit for outputting an ignition signal for driving the ignition control circuit; The magnet generator includes a generator coil, and the output end of the magnetic generator generates the primary current of the ignition coil by a voltage of one polarity of the output AC voltage. In the non-contact ignition device for a magnet generator type internal combustion engine, which is connected in such a manner that power is supplied to the power supply circuit by a voltage of the other polarity, the output end of the generator coil and the illusion of the tortoise circuit are connected in parallel to the power supply circuit at a connection point with the tun input terminal;
a regulator circuit including a constant voltage control switching element that operates in response to the application of a voltage of the other polarity of the output AC voltage of the generator coil; and the angular position of the fixed ignition angle output terminal of the angular position sensor. A non-contact ignition device for a magnet generator type internal combustion engine, which includes a reversal prevention circuit for controlling transmission from a sensor to the ignition timing control circuit. (2) In the apparatus according to claim 1, the reverse rotation prevention circuit includes a non-contact ignition device for a magnet generator type internal combustion engine, which includes an AND circuit that inputs a detection signal from the angular position sensor. . (3) In the device according to claim 1, the reversal prevention circuit is connected between the signal input terminal of the ignition timing control circuit and ground, and Contact ignition device.