JPS59226276A - Contactless ignition device for internal-combustion engine - Google Patents

Abstract

PURPOSE:To permit to realize a desired ignition timing characteristic having a proper angle characteristic and a delay angle characteristic by a simple circuit by a method wherein two series of alternating signals are generated by one set of sensor to make a plurality of reference angle signals and these signals are processed by each different layers. CONSTITUTION:The sensor 2 is provided so as to oppose to two sets of long protruding inductors 1b, 1c provided on the outer periphery of rotor for a magnetic generator 1 and two series of signal voltages are generated from the sensor 2. The signal voltages are inputted into each-different-layer circuit 40 through a waveform shaping circuit 30 and the two series of signals are stratified here into the reference angle signals (f), (g). The reference angle signal (f) is inputted into a delay angle characteristic generating circuit 50 of a mono-stable circuit to generate a pulse signal (h) having a constant pulse width T2 from the rise-up of the signal (f). A thyristor 8 is controlled by taking respective signals (g), (h) and the logics of an invertor output (e) and the charged charge of an igniting capacitor 7 is discharged upon the conduction thereof to obtain an ignition output.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a non-contact ignition device for an internal combustion engine that uses a magnet igniter as a power source.

BACKGROUND ART Today, there is a strong desire to provide inexpensive ignition devices with various ignition timing characteristics for the purpose of improving startability, fuel efficiency, and horsepower of vehicles. Conventionally, Japanese Patent Application Laid-open No. 52-107444 describes a monotonous relationship (for example, a linear proportional relationship, a monotonically increasing relationship, or a monotonically increasing relationship with the engine speed) for parameters that synchronize with the rotation of the internal combustion engine and express the operating state of the engine. It is equipped with a number of characteristic generating circuits that generate signals with a Nockles width having a relationship such as decreasing, etc., and a logic circuit that receives the output pulses of these characteristic generating circuits as input. An ignition M control device has been proposed that determines the shift amount of the crank angle from the reference position by calculating the product and determines the ignition time 14I, but the problem is that a large number of sensors are required to determine the position of each group Ql< Also, this conventional device d uses respective characteristic generating circuits to obtain the fixed characteristic and the retarded characteristic, so it requires a large number of characteristic generating circuits including expensive and complicated operational amplifier circuits. There is a problem.

The present invention has been made in view of the above problems, and provides at least two of the ignition timing characteristics that combine various fixed angle, retard, and advance angle characteristics required for internal combustion engines. It is an object of the present invention to provide an ignition device having the above fixing characteristics and one retardation characteristic at a low cost.

The configuration is such that one sensor generates two consecutive alternating signals, and 4. 'C1 number reference angle signal,
These reference angle signals are stratified by a stratification circuit, and the fixed characteristics are realized by matching the reference angle signals with the stratified reference angle signals, and the retardation characteristics are achieved by simply changing the delay angle from the reference angle signal. The key point is to achieve this by generating a large amount of electricity in a stabilizing circuit. In the configuration of the invention, at least one of the stratified circuits has a rigidity of 4
t74 is formed by a monostable circuit that operates in response to voltage No. g, and a logic circuit that uses the output pulse of this small stable circuit and a reference angle signal as input signals, and generates a characteristic that inputs the output signal of the stratified circuit. The circuit is characterized by having a delay angle characteristic, and at least one of the other layered circuits includes a detection signal obtained by detecting the operation of a switching element at the beginning of constant voltage adjustment of the power supply circuit. and a logic circuit which receives a reference angle signal as input.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows the entire circuit of a first embodiment of the invention. The magnet generator 1 has two long protruding inductors 1 on the outer periphery of the rotor. b, 1c
and the El 2j meko i1), l.

A sensor 2 is installed opposite to. A capacitor discharge type ignition circuit is formed by the capacitor charging coil/l/la, the diode 4.5.6, the ignition capacitor 7, the thyristor 8, the gate resistor 9, and the high-speed sun coil 3.

The ignition 1 timing control circuit IO inputs the output value of the sensor 2, determines the ignition timing, and outputs a signal to the capacitor discharge type ignition circuit. It is composed of a circuit 40, a retard characteristic generating circuit 50, an AND circuit 81, an OR circuit 80, a capacitor 90 for detecting pulse rising edge 11, and a diode 91. The power supply circuit 20 is composed of a Zener diode 8 21, 26, a resistor 22, a thyristor 23 for constant voltage control, a diode u1, and a capacitor 25, and has a constant voltage for each circuit on the ignition timing side al1 times t%IO. Supply voltage. The waveform shaping circuit 30 includes a comparator 3
1.32, reference resistance 36.37.38.39, input bias resistance 33.34.35, and resistance 3
4. ．． 35 dividing points are connected to the sensor 2.

The stratification circuit 40 receives the outputs (C), 4) of the comparators 31 and 32 as an input signal, and has an rli stabilization circuit 4 which generates an output signal with a pulse width "Il't according to the (1) signal.
1. The inverter circuit 42 and the AND circuit 43 and 44 constitute a three-dimensional system.
Sum = −・ −゛ Seven. Retard characteristic generation circuit 5
0 is a monostable circuit that uses the output (f) of the A tJ D circuit 44 as an input signal and emits an output signal with a pulse width T2 according to the (i') signal. FIG. 2 is a diagram showing the ignition relationship between the ignition timing characteristics and the output of the sensor 2 in the first embodiment. 3 and 4 show voltage waveforms at various parts of the circuit shown in FIG. 1. FIG.

Hereinafter, the functions and effects of the configuration of the first embodiment of the present invention will be explained using FIG. 1 and FIG. 2.3.4. Magnetic power generation (When the rotor of Shishi 1 rotates once, the rotor generates 4
In the case of a pole, the no-load voltage of the capacitor charging coil/I/1a (1a+ terminal in FIG. 1) becomes an alternating voltage as shown in FIG. The output signal of sensor 2 is 2 as shown in Fig. 3(b).
The signal rw pressure of thread connection becomes, and as shown in Fig. 2, θH1
, θLl, 11112, corresponding to the angular position of OL2 VIIt, VLt, Vn2. VL2
The settings are made so that signal voltages are generated respectively.

Then, the phase of the voltage (Ill) of the charging coil/I/1a and the signal voltage (1)) is 11. carp/L/ ], a
The signal voltage of the second system is in the negative polarity of the voltage, 2
Each part is arranged so that it fits.

The positive direction output of the capacitor charging coil L/l a causes current to flow through the diode 4, the capacitor 7, the primary coil of the ignition coil 3, and the diode 6, charging the ignition capacitor 7 and turning on the ignition power source. obtain. In addition, the negative direction voltage causes a current to flow through the diode 1'24, the capacitor 25, and the diode 5, and the power supply capacitor 2
5 and is a circuit for the regirator of the ignition capacitor 25). On the other hand, in the waveform shaping circuit 30 which uses the output signal (b) of the sensor 2 as an input signal, FIG.
As shown in (d), the positive direction output VIIt of sensor 2
, VH2K J: Rico: ys v-Evening 31 “1”
The resistor 33 is connected so that "1" is outputted to the comparator 32 by the negative direction outputs vLs and VL2.
．． 34, 35, 36, 37, 38, and 39 positions have been determined. Then, the output signal of the waveform shaping circuit 30 ←),
(b))) as an input signal, in the layered circuit 40, 2
Stratify the (0) signal of the system. The operation is as follows: (1) In the t-stability circuit 41 which receives a trigger signal, the third .
4) When the signal rises, the signal width T1
, and by combining the output signal and the (0) signal, the positive direction outputs Vnt and V of the sensor 2 are obtained.
The reference angle signal (0, (to)) corresponding to JI2 can be obtained. Also, the inverter output (e
) is the negative direction output VI- of sensor 2 as shown in FIG.
Since the two consecutive (d) signals corresponding to t and Vr-z are used as the trigger number 1g, its pulse width is larger than T1. In addition, the time constant that determines the width of one buff of the monostable circuit 41 is such that the (0) signal of the 2nd system is (1), (2) in the entire operating speed range from the time of startup to the low speed range.
It is set so that it can be stratified into reference angle signals. The retard angle custom-made generation circuit 50, which is a monostable circuit whose input port is the reference angle signal (f) separated from j~, generates a pulse with a constant pulse width T2 at the rising edge of (fl tJ). (, i+j
-0'1) is generated. By cold burying the reference angle signal (2), pulse signal (0), and output pulse signal (h) of the retard characteristic generating circuit 50, the OR circuit 80 The minute signal (j) obtained at the rising edge of the pulse output signal supplies a signal to the gate of the thyristor 8 to activate the thyristor 8, and the energy received in the ignition capacitor 7 is transferred to the 1 of the ignition coil 3.
Released at 1 o'clock through the next coil? 4t t, high voltage can be generated on the secondary coil side.

Assume that the engine requires the ignition timing characteristics shown in FIG. Here, the reference angle signal (
The retard angle (α) from the generation position θ of f') to the rise of the output signal (b) having a pulse width T2 of the retard characteristic generating circuit 50 is the angle between the prefectural bridge signal 0 and If it is 360°, then the following equation is obtained.

α=6·Na −T2 Therefore, as can be understood from the above equation, when T2 is constant, the retard angle α is in a proportional relationship with the number of strokes Na.

In Fig. 2, when the engine speed is below Nl rpm, the retard angle α<(7Ht-=//L
+ tona 9, A N D circuit 81) output h4”j-(1)
F, f, .theta.Ll have the same waveform as the rising pulse signal (e). Synchronized with the rise of the output f1- of the OF circuit 80 which uses the reference angle signal (2) and the above-mentioned angular signal as input signals, a differential signal (j) is obtained at the angular position of θL1, and the thyristor 8 is The electric charge stored in the ignition capacitor 7 is discharged.

According to the above explanation], when the engine speed is in the rotation speed range lower than N1 shown in FIG.
The engine is ignited.

Next, the operation of retarding the ignition timing with a constant slope as the engine speed increases from N1 to N2 will be explained. When the engine speed is N1 or more, the retard angle α of the output signal (h) of the retard characteristic generating circuit 50 is set to the time constant T2 of the 44 stabilizing circuit 500 so that it is expressed by the following equation.

θ311−θLl<α θIII −0112 Therefore,
The differential signal (j) obtained at the rise of the output signal of the OR circuit 80 coincides with the delay angle α.

Next, when the rotational speed of the engine exceeds N2, the retard angle α of the turning angle characteristic generating circuit 50 becomes as follows.

α>θat-0112 Therefore, as shown in FIG. 4, the output signal of the AND circuit 81 has the (1) waveform. The differential signal (j) obtained at the rise of the output signal of the OR circuit 80 is synchronized with No. 1 (medium angle signal (υ), and when the engine rotational speed is higher than that, the differential signal (j) also becomes the differential signal at the slow angle α position. is (jf).The electric charge stored in the ignition capacitor 7 is discharged first depending on the advance angle (θH2 angular position j1\) of the ignition signal +7-(j).At the highest engine speed In order to prevent charge from being accumulated in the ignition angle capacitor 7 at the retard side signal generation position (at the retard α position), the output of the capacitor charging coil 1a and the sensor 2
Since the output is set to 4'11 with No. 8, there is no problem with ignition.

According to the configuration of the present invention, for the required ignition time m characteristic shown in FIG. Since the angle (jf ;;・(11) can be realized using a monostable circuit 50 that is made !10 in response to It is possible to use an inexpensive F-series configuration without using a 1-meter operational amplifier path or a retard characteristic generating circuit, and since the number of elements in the ignition timing control circuit is small, temperature compensation It has a great effect that it is very advantageous for people.

The present invention is not limited to the ignition timing characteristics shown in FIG. 2 and the rotor valence of the magnet shaft electric machine being quadrivalent as in the first embodiment, but is applicable to systems with more complicated ignition timing characteristics. , and the rotor of the magnet generator has multiple poles (for example, 6, 8, 12 poles, etc.)
It is possible to deal with these cases. As a second hero example, the ignition timing characteristics shown in FIG. 5 are required, and
): The case where Tsuki's rotor has 8 poles will be explained. FIG. 6 is a complete circuit diagram of the ignition timing control circuit of the second embodiment. FIG. 5 is an ignition relationship diagram between ignition timing characteristics and sensor output in the second embodiment. Figures 7.8.9 are voltage and current waveform diagrams at various parts of the second real ellipse. The construction and operation of the second embodiment will be explained in detail below. Required ignition time υ shown in Figure 5
] In order to realize the characteristics, the ignition timing control circuit degree is obtained by one sensor 2o. The two fixed angle characteristic parts corresponding to the reference angle (a) of the II2 and θL2 angular positions are connected to the retarded angle characteristic part by a monostable circuit that operates corresponding to the reference angle (a) of the (1111 angle position 1j). , θH1, θL2
The lead angle characteristic section is constructed to be obtained by a lead angle calculation circuit that operates in response to a reference angle signal of the angular position. A more detailed configuration will be explained using FIG. The ignition timing control circuit 10' is the waveform shaping circuit 3 described in the first embodiment.
0. In addition to the layered circuit 40 (hereinafter referred to as the first layered circuit) and the retard characteristic generation circuit 50, the above-mentioned A power supply circuit 20' into which a resistor 27 for detecting the operation of the thyristor 23 is inserted, and a second circuit whose input signals are the voltage (j2) across the resistor 27 in the power supply circuit 20' and the output signal O) of the waveform shaping circuit 30. A layered circuit 60, a lead angle characteristic circuit 70 whose inputs are the output signal (n) of the second layered circuit mark and the output signal (Ω) of the first layered circuit 40, and the lead angle O whose input signals are the output signal (0) of the arithmetic circuit output cuff 0 and the output signal of the first layered circuit 40
R circuit 84, the circuit is outputting), and the retard characteristic circuit 50.
an AND circuit 83 whose input signal is the output signal of
%- and an OR circuit 82 which receives the input signal as an input signal.

The second layered circuit 60 is composed of resistors 61, 62, 64, and a transistor 63, which are operated in response to the input signal (A) to detect the operation of the thyristor 23 of the r'frJ-written L source circuit 20'. an inverter circuit 65 which receives the detection signal A3 6'n) of the circuit as an input signal;
1) An AND circuit 66 which receives the signal as an input signal.

The lead angle characteristic circuit 70 is typified by a circuit having lead angle calculation principles based on constant current charging, constant current discharging, and constant voltage detection of a capacitor as reported in Japanese Patent Application Laid-Open No. 56-143351. This is a well-known lead angle calculation circuit. The operation and effects of the second embodiment will be explained below with reference to Fig. 7.8.9.

The power supply circuit 2σ shown in FIG. 6 utilizes the negative direction output that does not contribute to charging the ignition capacitor 7 of the capacitor charging coil /L/J,a shown in FIG. 1, and as shown in FIG. , In contrast to the no-load output voltage waveform (a) of the capacitor charging coil/l/l a, the output current waveform when connected to the ignition circuit is different from the load when outputting in the positive direction and in the negative direction and the phase of the current. Due to delays, etc., it becomes like (Y). Conventionally, when stratifying two systems of sensor signals, it has been known to stratify them by configuring the output and logic of the capacitor charging coil 1a. , there is a large difference in the data of positive and negative outputs, and θLl, θ
Negative direction signal of sensor output generated at L2 angle position 1 ■
When tl and VL2 are separated by jfl, there is little margin for the set mechanical angle, and precision is required for the set angle of each component.

In the second embodiment of the present invention, the capacitor charging coil/l
When the negative direction output contributing to the power supply circuit 20' of /la is generated and the voltage of the power supply capacitor 25 in the power supply circuit 20' reaches a constant value, the thyristor 23 operates and the capacitor charging coil /L/ Bypass the output of 1a. That is, during the operation period of the thyristor 23, two systems of sensor signals VLI and VL are generated by utilizing the fact that the negative direction output MmlJ of the capacitor charging coil 1a is
2. Secure the data-to-tea ratio necessary for stratification. ?
The P;2 layered circuit 60 includes JJ, L resistor 2 connected between the cathode of the thyristor 23 in the power supply circuit 20' and the ground.
7 is detected, and the operating state of the Cyrisk 23 is detected.

18 detected by the 20th Pad yJJ circuit 60
As shown in FIG. 7(e), No. (e) has a smaller side-to-side ratio than the waveform in FIG. 7(y). In the second stratification circuit 60, a logic circuit 66 can be used to obtain an angle signal (B) generated at the θL2 angular position using the A) signal and the four signals.

As in the first embodiment, there are three basic angles fLi (f)i seconds.

Based on (rl), the situation in which the engine operates to realize the required ignition timing characteristics shown in FIG. 5 will be explained. The advance characteristic circuit 70 generates a line output that advances the engine speed between the angles θTll and I/L2 from NO to N2. In Fig. 5, when the engine speed is less than N1rprr1, as shown in Fig. 7(r), the output No. 18 V) of ORI7J*82 is the reference angle signal (2) and the advance angle function 'nl! l! The l-road output signal (0) and the reference angle -υ (current) are output, but the ignition position is the temporally earliest reference angle signal (numbered as υ).

Figure 8 1-1. Figure 9 shows the case where the engine speed is Nt to Narpm, and the advance and retard characteristics are obtained by 18. According to the configuration of the second embodiment, the negative direction outputs VLx and VL2 of the sensor 2 are stratified and used as the base angle signal for creating the fixed angle characteristic part. Even in the case of a multi-pole rotor with magnet-loaded magnets, there is a large degree of margin for setting the angle of the component. This has the great effect of being able to be realized with a circuit configuration.

As described above, the present invention (according to hydrocyanic acid) uses a plurality of stratified reference angle signals, so one sensor can provide fixed characteristics and retard 1.1 units. All of the desired J9J characteristics during ignition can be achieved without using an expensive and expensive operational amplifier circuit, and an inexpensive ignition device can be provided, which has an excellent effect.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing the entire circuit of the first embodiment of the present invention;
Fig. 2 is an ignition relationship diagram between the ignition timing t1: and the sensor output, Figs. 3 and 4 are waveforms showing voltage waveforms at various parts of the circuit shown in Fig. 1, and Fig. 5 is a diagram of the second embodiment. The ignition relationship 1λ1 between the custom-made required ignition timing and the sensor output in Figure 6 is: 1) 2) Complete circuit diagram of the example ignition timing control circuit,
Figures 7.8.9 are pressure current waveform diagrams at various parts in the second embodiment. 1...(Ganseki'A'tL 4f4.2...Sensor, 3...Ignition coil, 7...Ignition capacitor, 8...Thyristor, 10.10'...Ignition timing 11ΔJ ( +1 circuit, 20, 20'...?
waveform shaping circuit, 40.60...
IN separate circuit, 41...monostable circuit, 42...inverter times M:'r, 43.44...AND circuit, 5
0...Angle of attack characteristic generation circuit, 70...Angle of attack characteristic generation circuit, 80...OR circuit, 8]...AND circuit. Figure 5 first diagram

Claims (1)

[Scope of Claims] 0) A capacitor discharge type ignition circuit, one sensor that outputs two systems of alternating signals per rotation of the magnet generator, and the output signal of the sensor is input as a reference angle signal, and the ignition and an ignition # period control circuit that outputs an ignition timing signal to the circuit, and this ignition JiJJ control circuit includes one or more stratification circuits that stratify the output signal of the sensor, and a nuclear stratification channel. one or more characteristic generating circuits that generate a signal with a pulse width that has a monotonous relationship with the output signal; and a logic circuit that receives the output pulses of the characteristic generating circuits and the output signal of the stratification circuit. and at least one of the stratified circuits includes a monostable circuit that operates in response to a signal voltage of one polarity of the sensor, and an output pulse of the monostable circuit and an output signal of the sensor. A non-contact point for an internal combustion engine, characterized in that at least one of the characteristic generating circuits which receives the output signal of the stratified circuit and has a retard characteristic. Ignition device. (2) The ignition device according to claim 1, wherein the characteristic generating circuit having the retard characteristic is configured by a monostable circuit. (3) The capacitor discharge type ignition circuit, a sensor that outputs an alternating signal in synchronization with the rotation of the magnet generator, and the output signal of the nuclear sensor are input as a reference angle signal, and an ignition timing signal is output to the ignition circuit. an ignition timing control circuit, the ignition timing control circuit comprising one or more stratification circuits for stratifying the output signals of the sensor, and a signal having required characteristics for the output signals of the stratification circuits. one or more characteristic generating circuits that generate the characteristic generating circuit; a logic circuit that receives as input the output pulses of the characteristic generating circuits and the output signals of the stratifying circuit;
Of the alternating output generated by the generator, the ignition 1r8
It has four iππ circuits including constant voltage control switching elements whose supply source is an output with a polarity that does not contribute to the charging of the ignition capacitor provided in one path, and at least one of the stratified circuits is connected to the switching element. A non-contact ignition device for an internal combustion engine, comprising a logic circuit that receives as input a detected value obtained by detecting the operation of an element and an output signal of the sensor.