JP4582445B2 - Ignition operation control method in standby speed range of ignition device for internal combustion engine - Google Patents

Description

  The present invention relates to an ignition operation control method in a standby speed range of an internal combustion engine ignition device of a capacity discharge type.

  In order to obtain a safe and efficient operation of the internal combustion engine, a reduction in fuel consumption rate, and purification of exhaust gas, it is strongly required to accurately control the ignition timing to a desired timing. There has been proposed a conventional technique using a (microcomputer).

  The above-described prior art is provided with a power supply circuit that converts the output voltage of the power generation coil (exciter coil) into a DC voltage, and this power supply circuit is used as a power source for the microcomputer. Thus, an ignition signal is provided.

With this configuration, the microcomputer can be operated without using a battery, and an excellent function that an ignition operation can be performed even at a low speed of an engine where a voltage that can operate the microcomputer cannot be obtained. Demonstrate.
Japanese Examined Patent Publication No. 7-26602

  However, in the above-described prior art, since the rotation operation of the internal combustion engine cannot obtain a sufficient inertia effect, the compression operation of the internal combustion engine acts as a strong braking force and is never stable. However, since the ignition operation is performed at a timing according to the rotational speed determined according to the time required for one rotation of the internal combustion engine even in the standby speed range, the actual ignition timing tends to advance compared to the proper ignition timing. Thus, there has been a problem that the rotational operation of the internal combustion engine becomes more unstable.

  Therefore, the present invention was devised to solve the above-described problems in the prior art, and in the standby speed range where the rotational operation of the internal combustion engine is hardly stable, the compression process of the internal combustion engine is performed. It is an object of the present invention to accurately determine the degree of influence on the inertial effect and to sufficiently enhance the stability of the rotational operation of the internal combustion engine in the standby speed range.

Among the present invention for solving the above technical problems, the means of the invention according to claim 1 is:
An ignition coil having a spark plug connected to the secondary side, a power generation coil in a magnet generator driven by an internal combustion engine, and a primary side of the ignition coil, which is charged by the forward voltage of the output voltage of the power generation coil A capacitive discharge type internal combustion engine ignition circuit having a charging capacitor and a discharge switching element that conducts when the ignition signal is input and discharges the charge of the charging capacitor to the primary coil of the ignition coil is provided with a forward voltage component of the output voltage. However, as a voltage value at which a continuous ignition operation can be obtained, the rotation speed is calculated according to the cycle detection signal generated at the ignition timing calculation start time when the preset cycle detection voltage value is reached, and the calculated rotation An ignition timing control device having a microcomputer unit that generates an ignition timing calculation signal for determining an ignition timing signal that is a time signal corresponding to speed and outputs an ignition signal It is ignition operation control method in a standby speed region of the attached internal combustion engine ignition apparatus,
The lower limit speed, which is the upper limit of the lower limit speed range that is set as an unstable speed range in which the rotational operation of the internal combustion engine is considered to cause reverse rotation, and the operating speed range suitable for operating the load Rotation operation of the internal combustion engine between the operating speed, which is the lower limit of the engine speed, is set to a speed range that is unstable so that it does not reverse, but is not stable, including idling In the speed range, the microcomputer table database table equally divides the passage time of a fixed rotation angle range mainly in the compression process range from the top dead center to a position slightly advanced from the top dead center. determining count values as respective ignition timing computing signals corresponding to the respective time range which is,
The ignition timing calculation signal is counted from the time when it reaches a position slightly advanced from the top dead center of the internal combustion engine, and an ignition signal is output to the discharge switching element when counting up,
It is in.

  In the invention according to claim 1, the cycle detection signal is obtained from the output voltage of the power generation coil of the ignition device for the capacity discharge type internal combustion engine, and the ignition signal is obtained according to the ignition timing signal obtained from the cycle detection signal. In the ignition control method in which outputting is the basic operation of the ignition operation, the compression process area from the top dead center to the position slightly advanced from the top dead center of the internal combustion engine is mainly based on the database table of the microcomputer unit only in the standby speed range. The ignition timing calculation signal, which is a count value, is determined according to the passage time within a certain rotation angle range, and this ignition timing calculation signal is counted from the time when it reaches a position slightly advanced from the top dead center of the internal combustion engine. The ignition operation is performed.

  Since the top dead center of the internal combustion engine is a position where the compression process ends, the rotational operation of the internal combustion engine in a constant rotation angle range mainly consisting of the compression process from the top dead center to a position slightly advanced is determined by the speed. However, since it is located in the standby speed range where a sufficient inertial effect cannot be obtained, the braking action accompanying the compression operation is strongly received.

  For this reason, the rotation speed temporarily decreases, but the passage time of a fixed rotation angle range mainly consisting of a compression process from the top dead center to a position slightly advanced is detected, that is, the rotation speed is detected. By comparing with the rotational speed of one cycle at the time, the degree of influence of the compression process on the inertial effect can be accurately determined.

  According to the degree of the influence of the compression process on the accurately determined inertial effect, the rotation speed in the standby speed range is set to the passage time of a fixed rotation angle range mainly consisting of the compression process from the top dead center to the position slightly advanced. At the same time, the time from the position slightly advanced from top dead center to the desired ignition position at this rotational speed is set as an ignition timing calculation signal that is a count value of unit time, and this is set in the database table of the microcomputer unit Remember me.

  In other words, the count value, which is the ignition timing calculation signal, is recorded in the database table of the microcomputer unit corresponding to the passage time of a fixed rotation angle range mainly consisting of a compression process from the top dead center to a position slightly advanced. Therefore, when the internal combustion engine reaches a position slightly advanced from top dead center, it starts counting the ignition timing calculation signal that has not yet been determined, and at the same time, performs a compression process to a position slightly advanced from top dead center. The passage time within a fixed rotation angle range as a main body is detected, and the count value of the ignition timing calculation signal is determined from the value in the database table of the microcomputer unit.

  In this way, when the count value is determined, the ignition signal is output by counting up the count that starts when the internal combustion engine reaches a position slightly advanced from the top dead center according to the count value.

  According to the second aspect of the present invention, the delayed reverse voltage component of the output voltage reaches the peak voltage value by the voltage signal which is a detection signal of the reverse voltage component of the output voltage of the power generation coil. A peak voltage detection signal is generated at the peak detection time, and the passage time of a fixed rotation angle range mainly in the compression process area from the top dead center to a position slightly advanced from the top dead center is peaked from the start of ignition timing calculation. The time until the detection time is added.

  In the invention according to claim 2, in the ignition device for a capacity discharge type internal combustion engine, in order to effectively act the output power of the power generation coil on the ignition operation, the output power of the power generation coil is It is generated as close as possible, but the fact that the output power of the power generation coil is output as close as possible before the ignition timing is because the ignition timing is slightly before top dead center. The output power of the power generation coil is output in a time domain mainly composed of the compression process.

  Therefore, the time from the ignition timing calculation start time to the peak detection time is a passing time in a constant rotation angle range mainly composed of the compression process area from the top dead center of the internal combustion engine to a position slightly advanced.

  The ignition timing calculation start time is a time when the forward voltage of the output voltage of the power generation coil reaches a preset cycle detection voltage value as a voltage value that can obtain a continuous ignition operation. Since the synchronization detection signal is output at the calculation start time, the synchronization detection signal is always output as long as the internal combustion engine is operating, and the ignition timing calculation start time can be reliably detected by the output of the synchronization detection signal.

  Similarly, the peak detection time point can be reliably detected from the peak voltage detection signal, but the peak voltage detection signal detects and outputs that the delayed reverse voltage has reached the peak voltage value. And, it is output accurately and reliably without being affected by the fluctuation of the voltage due to the fluctuation of the gap of the magnet generator, and the peak detection time can also be accurately and reliably detected.

  In this way, according to the output voltage of the power generation coil that is reliably obtained by the operation of the internal combustion engine, the passage time of a constant rotation angle range mainly in the compression process range from the top dead center to the position slightly advanced is detected. Therefore, the detection of this passing time is easily and reliably achieved.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the first aspect of the invention, it is possible to accurately determine the degree of influence of the compression process on the inertial effect of the internal combustion engine in the standby speed range, and according to this, a position slightly advanced from the top dead center Since the time to the desired ignition position at this rotational speed is set as the ignition timing calculation signal, it is possible to always obtain an ignition operation at an appropriate position and to maintain a stable and favorable ignition operation. .

  Further, since the ignition timing calculation signal set corresponding to each rotation speed is stored in advance in the database table of the microcomputer unit, the determination of the appropriate ignition timing calculation signal can be achieved accurately and promptly. .

  In the invention according to claim 2, the constant rotation angle mainly in the compression process area from the ignition timing calculation start time to the peak detection time to the position slightly advanced from the top dead center of the internal combustion engine. It is possible to accurately correspond to the passage time of the range, and the ignition timing calculation signal obtained thereby becomes appropriate.

  In addition, according to the output voltage of the power generation coil that is reliably obtained by the operation of the internal combustion engine, it detects the passage time of a constant rotation angle range mainly in the compression process area from the top dead center to a position slightly advanced from the top dead center. The detection of the passage time is simple and surely achieved, and a stable and good ignition operation in the standby speed range can be easily obtained.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a circuit diagram showing a circuit configuration of an ignition timing control device 1 according to the present invention, which constitutes an internal combustion engine ignition device in combination with a capacity discharge ignition circuit. The ignition timing control device 1 includes a constant voltage power supply unit. 2, a microcomputer unit 3, a periodic signal generation unit 4, and a reverse voltage divided voltage detection unit 5.

  A capacity discharge type ignition circuit to which the ignition timing control device 1 is assembled includes an ignition coil 8 having a spark plug 9 connected to the secondary side, a power generation coil 6 constituting a magnet generator driven by an internal combustion engine, A charging capacitor c6 that is provided on the primary side of the ignition coil 8 and is charged with the forward voltage e1 of the output voltage E of the power generation coil 6, and the electric charge of the charging capacitor c6 is discharged to the primary coil of the ignition coil 8 by conduction. And the discharge switching element 7.

  The forward voltage component e1 of the output voltage E induced in the generator coil 6 is charged into the charging capacitor c6 through the charging diode d3, and the charge charged in the charging capacitor c6 causes the discharge energy regeneration diode d7 to be anti-parallel. Connected and discharged to the primary coil of the ignition coil 8 by the trigger of the discharge switching element 7 which is a thyristor to which the gate stabilization resistor r8 is connected, thereby inducing a high voltage in the secondary coil of the ignition coil 8 to spark plug 9 generates a spark discharge to ignite the internal combustion engine.

  The constant voltage power supply unit 2 of the ignition timing control device 1 charges a reverse voltage component e2 (see FIG. 2) of the output voltage E of the power generation coil 6, and outputs a constant voltage value to the microcomputer unit 3 and the periodic signal generation unit. 4. The reverse voltage component voltage detector 5 supplies the reverse voltage component e2 of the output voltage E of the power generation coil 6 rectified by the rectifier diode d4 to the overvoltage prevention zener diode 22 in parallel through the current limiting resistor r1. When the connected power supply capacitor c1 is charged and this charging voltage reaches a preset constant voltage value, the voltage stabilizing transistor 20 having the voltage stabilizing Zener diode 21 and the base resistor r2 connected to the base becomes conductive. Output a constant voltage.

  The constant voltage value of the constant voltage power supply unit 2 is set to a value close to the upper limit value of the operable voltage of the microcomputer 30 of the microcomputer unit 3, specifically, 5 V, thereby causing surge noise in the constant voltage output signal. Even if it intrudes, it is made not to be affected by this surge noise.

  The microcomputer unit 3 includes a microcomputer 30 and a reset IC 32. The reset IC 32 inserted and connected in parallel to the output terminal of the constant voltage power source unit 2 has an output terminal connected to the reset noise removing capacitor c3 connected to the microcomputer. The microcomputer 30 is started by detecting that the output voltage value of the constant voltage power supply unit 2 has reached a preset constant value.

  The microcomputer 30 assembled with the clock generator 31 inputs a constant voltage signal from the constant voltage power supply 2 via the power supply noise removing capacitor c2, and outputs the ignition signal s4 via the ignition signal supply resistor r3. Output to the switching element 7.

  The periodic signal generation unit 4 applies a constant voltage signal from the constant voltage power supply unit 2 to the signal generation transistor 40 via the waveform shaping resistor r5, and a detection Zener diode 41 connected to the base of the signal generation transistor 40. When the forward voltage e1 of the output voltage E of the generator coil 6 exceeds a preset period detection voltage value v1 by the series circuit of the voltage detection resistor r4, the signal generation transistor 40 is turned on to generate this signal. The potential at the connection point between the transistor 40 and the waveform shaping resistor r5 is output to the microcomputer unit 3 as the cycle detection signal s1.

  Note that a series circuit of a noise removing diode d1 and a noise removing capacitor c4 is connected in parallel to the series circuit of the signal generating transistor 40 and the waveform shaping resistor r5.

  The reverse voltage dividing voltage detector 5 adds a delay-side reverse voltage component e2 of the output voltage E of the power generation coil 6 to a series circuit of voltage setting voltage dividing resistors r6 and r7, and both voltage setting voltage dividing resistors r6, The voltage at the voltage dividing point r7 is output to the microcomputer unit 3 as the voltage signal s6. A noise removing capacitor c5 is connected between the voltage dividing point of both voltage setting voltage dividing resistors r6 and r7 and the ground, and noise is removed between the voltage dividing point and the constant voltage power supply unit 2. A diode d2 is connected.

  The period detection voltage value v1 set by the period signal generator 4 is set to about 40 V, for example, in accordance with the value of the forward voltage e1 obtained in the rotational speed range where the internal combustion engine can be stably started. Since the constant voltage output signal of the constant voltage power supply unit 2 is output before and after the value of the forward voltage component e1 reaches the cycle detection voltage value v1, the microcomputer 30 almost simultaneously outputs the cycle detection signal s1. Launched.

  When the period detection signal s1 is input, the microcomputer 30 calculates the rotation speed by measuring the time until the next ignition timing calculation start time t1 with the input time as the ignition timing calculation start time t1. The ignition timing corresponding to the rotation speed is selected from a large number of data stored in advance, and the ignition timing calculation signal s5 of the cycle where the next ignition timing calculation start time t1 is located is created.

  In addition, when the voltage signal s6 is input from the reverse voltage component voltage detector 5, the microcomputer 30 inputs the voltage signal s6 to the A / D converter, and the voltage value of the delay side reverse voltage component e2 has reached the peak voltage value v2. The peak voltage detection signal s2 is detected at the peak detection time t3, and as close as possible to the top dead center of the internal combustion engine, and a value that can be reliably detected, for example, the starting voltage value v3 set to 0.3V. An activation voltage detection signal s3 for detecting the arrival is output at the activation time t2.

  Then, the microcomputer 30 operates the load with the lower limit speed u which is the upper limit of the lower limit speed range x set as an unstable speed range in which the rotational operation of the internal combustion engine is considered to be likely to cause reverse rotation. The rotational speed of the internal combustion engine between the operating speed w, which is the lower limit of the operating speed range z suitable for the rotation, does not cause reverse rotation, but is an unstable speed range that is never stable If the measured rotational speed is in the standby speed range y including idling set as, the time from the ignition timing calculation start time t1 to the peak detection time t3, that is, a little progress from the top dead center of the internal combustion engine. The ignition timing calculation signal s5 is determined in accordance with the passage time of a constant rotation angle range mainly consisting of the compression process up to the angled position.

  That is, the speed is calculated in advance according to the time from the ignition timing calculation start time t1 to the peak detection time t3 for each rotational speed in the standby speed range y, and the desired ignition timing is determined from the peak detection time t3 according to the calculated speed. Is calculated as an ignition timing calculation signal s5, the result is recorded in a database table, and the measured time from the ignition timing calculation start time t1 to the peak detection time t3 is matched with this database table, The ignition timing calculation signal s5 is determined.

  FIG. 7 shows an example of the contents of the database table when the standby speed range y is set in the range of the rotational speed 1500 to 4000 rpm. Peak detection is performed from the ignition timing calculation start time t1 corresponding to the range of the rotational speed 1500 to 4000 rpm. The time range from 2.56 to 4.61 ms, which is the time (ms) range up to time t3, is equally divided into eight with the high-speed side as address 0, and each address is equally divided into time ranges. The count value as the corresponding ignition timing calculation signal s5 is calculated and set.

  The rotation speed (rpm) is not recorded in the database table, but is attached as a rotation speed (rpm) range corresponding to each time (ms) range as reference data. As is apparent from the value in the (rpm) range, the inertial effect required can be obtained in contrast to one address every 100 rpm in the low speed range up to 2200 rpm where the inertial effect is not sufficient. The range of 2200 to 4000 rpm is grouped into 0 address which is one address.

  As shown in the example of the contents of the database table in FIG. 7, the count value increases at an accelerated rate as the passage time (ms) is longer, that is, as the rotational speed (rpm) is lower. From this, it can be seen that the braking action of the compression process against the inertial effect increases rapidly as the speed decreases.

Next, operation | movement of an ignition device is demonstrated in order from the time of starting.
When a constant voltage is output from the constant voltage power supply unit 2 by rotating the internal combustion engine, this is detected by the reset IC 32, and the microcomputer 30 is started up after releasing the reset. After entering the standby state.

  From this state (refer to FIG. 2 below), when the first cycle detection signal s1 is input, the startup voltage value v3 set in advance is detected from the voltage signal s6 that is input immediately after this, and the startup voltage detection signal is detected. s3 is generated, and in response to the generation of the starting voltage detection signal s3, the ignition signal s4 is immediately output to the discharge switching element 7 of the ignition circuit to perform an ignition operation, thereby starting the internal combustion engine safely and reliably.

  Since the ignition operation with the ignition time t2 as the start time t2 is performed safely and reliably without causing any kicking, a predetermined time or speed is set at the start time when the rotation operation is not always stable, that is, in the start mode. In the set lower speed range x (for example, 700-1500 rpm), the ignition time is set to the start time t2, and the operation is performed.

  After the start-up mode, when the rotational speed of the internal combustion engine becomes equal to or lower than the lower limit speed u, which is the upper limit of the lower limit speed range x, the rotational operation of the internal combustion engine is extremely unstable. (For example, 700 to 1000 rpm), when the induced voltage of a dedicated trigger coil (not shown) reaches the trigger voltage of the discharge switching element 7, the ignition timing is set, and the rotational operation of the internal combustion engine is unstable. In a certain upper half region (for example, 1000 to 1500 rpm) of the lower limit speed region x, a count value according to the time from the ignition timing calculation start time t1 to the peak detection time t3 is read from the database table of the microcomputer 30, and this count The value is counted from the peak detection time t3, and the ignition signal s4 is output when counting up (see FIG. 3).

  That is, since the inertial effect of the flywheel is not sufficiently exhibited, in the lower limit speed range x where the rotational operation of the internal combustion engine is not stable, the advance timing position as close as possible to the top dead center is set as the ignition timing, thereby achieving high reliability. To keep the ignition operation.

  The rotational speed of the internal combustion engine is stable from the lower limit speed u which is the upper limit value of the lower limit speed range x to the operating speed w which is the lower limit value of the operating speed range z suitable for operating the load. If it rises to a standby speed range y including idling (for example, 1500 to 4000 rpm), it follows the time from the ignition timing calculation start time t1 to the peak detection time t3 as shown in FIG. The counted value is read from the database table of the microcomputer 30 (see FIG. 7), the counted value is counted from the peak detection time t3, and the ignition signal s4 is output at the time of counting up.

  In this standby speed range y, as apparent from the change in the count value recorded in the database table shown in FIG. 7, when the rotational speed is in the range of 1500 to 2000 rpm, the time (ms) becomes shorter, that is, the rotational speed. As the value increases, the count value rapidly decreases and the ignition timing is rapidly advanced. However, in the range of 2000 to 4000 rpm, there is no change in the count value in spite of the increase in the rotation speed. There is almost no change in the ignition timing.

  When the rotational speed of the internal combustion engine exceeds the operating speed w and reaches an operating speed range z suitable for operating with a load, as shown in FIG. 4, at the time when the previous cycle detection signal s1 is input. From the time from a certain ignition timing calculation start time t1 to the current ignition timing calculation start time t1, the rotational speed at the current ignition timing calculation start time t1 is calculated, and stored in advance corresponding to the calculated rotational speed. An ignition timing calculation signal s5 for selecting the ignition timing signal that has been set is obtained, and the ignition timing signal obtained by the ignition timing calculation signal s5 is counted from the current ignition timing calculation start time t1, and ignition is performed after the ignition timing signal has elapsed. The signal s4 is output.

  In this operating speed range z, since the advance angle most suitable for each rotational speed is obtained, the output of the internal combustion engine can be sufficiently increased, and the combined load can be operated efficiently.

  When the rotation speed of the internal combustion engine exceeds the upper limit value (for example, 8000 rpm) of the operating speed range z, as shown in FIG. 5, the ignition timing calculation signal s5 becomes longer than the obtained ignition timing signal. Therefore, since the ignition signal s4 cannot be obtained, the ignition timing signal obtained from the ignition timing calculation signal s5 of the previous cycle is used as it is in the next cycle.

  FIG. 6 shows an example of the advance characteristic line k of the illustrated embodiment. In the lower limit speed range x (700 to 1500 rpm) close to the kickback area m, there is almost no advance. In order to obtain a reliable rotational operation, in the waiting speed range y (1500 to 4000 rpm), in the lower half region of 1500 to 2000 rpm, a large advance angle is obtained so that a stable inertia effect can be obtained quickly. In the upper half region of 2000 to 4000 rpm, in order to obtain a stable and economical idling state, there is almost no advance angle.

  When the rotation speed reaches the operation speed w (4000 rpm), the step advance angle is entered, and at the same time, the operation speed range z is entered, and the most efficient advance angle operation is performed up to the high speed upper limit speed of 8000 rpm.

It is an electric circuit which shows an example of the circuit structure of the ignition timing control apparatus which implements this invention. It is an operation | movement diagram which shows the operation example at the time of starting of this invention. It is an operation | movement diagram which shows the operation example in the standby speed range of this invention. It is an operation | movement diagram which shows the operation example in the operating speed range of this invention. It is an operation | movement diagram which shows the operation example in the speed range beyond the high speed upper limit of the operating speed range of this invention. It is a characteristic diagram which shows an example of the advance angle characteristic of this invention. It is explanatory drawing which shows an example of the recording content of the database table recorded on the microcomputer in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Ignition timing control device 2; Constant voltage power supply part 20; Voltage stabilization transistor 21; Voltage stabilization Zener diode 22; Overvoltage prevention Zener diode c1; Power supply capacitor r1; Current limiting resistance r2; Base resistance 3; ; Microcomputer 31; Clock generator 32; Reset IC
c2; power supply noise removal capacitor c3; reset noise removal capacitor r3; ignition signal supply resistor 4; periodic signal generator 40; signal generation transistor 41; detection zener diode r4; voltage detection resistor r5; waveform shaping resistor d1; Noise removing diode c4; Noise removing capacitor 5; Reverse voltage divided voltage detector r6; Voltage setting voltage dividing resistor r7; Voltage setting voltage dividing resistor d2; Noise removing diode c5; Noise removing capacitor 6; Discharge switching element 8; ignition coil 9; spark plug c6; charging capacitor d3: charging diode d4; rectifier diode d5; rectifier diode d6; rectifier diode d7; discharge energy regenerative diode r8; gate stabilization resistor E; Voltage e1; Forward voltage e2; Reverse voltage v1; Period detection voltage value v2; Peak voltage value v3; Start-up voltage value s1; Period detection signal s2; Peak voltage detection signal s3; Start-up voltage detection signal s4; Ignition signal s5; Ignition timing calculation signal s6; Voltage signal t1; Ignition timing calculation start time t2; Startup time t3; Peak detection time x; Lower speed range y; Standby speed range z; Operating speed range u; Lower limit speed w; Angular characteristic line m; kickback area

Claims (2)

An ignition coil (8) having a spark plug (9) connected to the secondary side, a power generation coil (6) in a magnet generator driven by an internal combustion engine, and a primary side of the ignition coil (8); The charging capacitor (c6) charged by the forward voltage (e1) of the output voltage (E) of the power generation coil (6) is electrically connected to the charging capacitor (c6) by the input of the ignition signal (s4). The forward voltage component (e1) can obtain a continuous ignition operation in an ignition circuit for a capacitive discharge type internal combustion engine having a discharge switching element (7) for discharging a primary coil of the ignition coil (8). As a possible voltage value, the rotational speed is calculated according to the period detection signal (s1) generated at the ignition timing calculation start time (t1) when the predetermined period detection voltage value (v1) is reached, and the calculated rotation speed When responding to An internal combustion engine for which an ignition timing control device (1) having a microcomputer section (3) for generating an ignition timing calculation signal (s5) for determining an ignition timing signal as a signal and generating an ignition signal (s4) is assembled In the ignition device, the rotation speed of the internal combustion engine is a lower limit speed (u) that is an upper limit of the lower limit speed range (x) set as a speed range that is unstable to the extent that reverse rotation is likely to occur, and a load The rotational operation of the internal combustion engine between the operating speed (w), which is the lower limit of the operating speed range (z) suitable for operating the engine, is never stabilized, although no reverse rotation occurs. In the standby speed range (y) including idling, which is set as an unstable speed range, the compression process to a position slightly advanced from the top dead center of the internal combustion engine by the database table of the microcomputer unit (3) Constant based on region Aliquoted transit time of the rolling angle range, determines a count value corresponding to each time range obtained by the equal amount as each ignition timing calculation signal (s5), said ignition timing calculation signal (s5) In the standby speed range of the internal combustion engine ignition device that counts from the time when it reaches a position slightly advanced from the top dead center of the internal combustion engine and outputs the ignition signal (s4) to the discharge switching element (7) when counting up. Ignition operation control method.   A voltage signal (s6), which is a detection signal of the reverse voltage component (e2) of the output voltage (E) of the power generation coil (6), causes the delay-side reverse voltage component (e2) of the output voltage (E) to have a peak voltage value ( The peak voltage detection signal (s2) is generated at the peak detection time point (t3) reaching v2), and passes through a constant rotation angle range mainly in the compression process area from the top dead center to a position slightly advanced from the top dead center. The ignition operation control method in the standby speed region of the internal combustion engine ignition device according to claim 1, wherein the time is a time from an ignition timing calculation start time (t1) to a peak detection time (t3).

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