JP4483436B2 - Ignition point control method and ignition point control device for internal combustion engine ignition device. - Google Patents

Description

  The present invention relates to an ignition point control method and an ignition point control device for an induction discharge ignition device for an internal combustion engine.

  As an ignition device for an internal combustion engine, a primary short-circuit current flowing through a primary winding of an ignition coil is suddenly cut off, thereby generating a high voltage in the secondary winding of the ignition coil and being connected to the secondary winding. 2. Description of the Related Art An induction discharge ignition device that performs an ignition operation by generating a spark discharge in a spark plug is known.

  Although this induction discharge type ignition device has an advantage that the structure is simple and a reliable ignition operation can be obtained, a large advance angle width at the ignition time cannot be obtained, and therefore the ignition time is desired. It is not always possible to control accurately at the time of operation, and this makes it difficult to achieve safe and efficient operation of the internal combustion engine, reduction of fuel consumption rate, and purification of exhaust gas. was there.

In order to eliminate this dissatisfaction, when the half-cycle voltage of one polarity that appears first is generated among at least one cycle of AC voltage induced by the primary winding of the ignition coil, the primary winding is The first current control circuit that suddenly cuts off the flowing primary short-circuit current and the second half-cycle voltage of the other polarity appearing among the AC voltages induced by the primary winding of the ignition coil are generated. A second current control circuit that suddenly cuts off the primary short-circuit current flowing through the primary winding, and the first current control circuit when the rotational speed of the internal combustion engine is lower than a preset advance rotational speed In other cases, it is possible to make a large advance at the ignition timing with the advance rotation speed as a boundary.
Japanese Patent Laid-Open No. 11-190268

  However, in the above-described prior art, since the advance rotation speed is detected, the first half-cycle voltage of one polarity that appears first is detected by the adjustment adjustment of the resistance partial pressure. There are variations in voltage due to variations in power generation capacity, air gaps between the ignition coil and flywheel, etc. Therefore, there is a problem that it is necessary to adjust the setting, and handling is complicated and a highly skilled technique is required.

  In addition, since the obtained ignition time is only one time fixedly set by the resistance partial pressure, the ignition time is not always adapted to the changing rotational speed, and therefore it is not always more efficient. There is a problem that it is not always possible to obtain a combustion operation.

  Furthermore, since two current control circuits having substantially the same voltage detection function and current cut-off function are required, the overall configuration is complicated, and a large number of semiconductor switches are used, resulting in a high manufacturing cost. was there.

  Accordingly, the present invention was devised to solve the above-described problems in the prior art, and detects the rotational speed from the cycle of the voltage cycle generated in the primary winding of the ignition coil, and the ignition suitable for the rotational speed. The purpose is to set the time point as a timer, and to enable accurate and stable rotation speed measurement and more efficient combustion operation even if there is voltage variation in the ignition coil. To do.

Among the present invention for solving the above technical problems, the configuration of the invention according to claim 1 is:
A series circuit of a first semiconductor switch and a current detection resistor is connected in parallel to the primary winding of the ignition coil, and a second semiconductor switch is connected to the first semiconductor switch. For an induction discharge type internal combustion engine that turns off the semiconductor switch to suddenly cut off the primary short-circuit current flowing in the primary winding and generate a spark discharge in the spark plug connected to the secondary winding of the ignition coil An ignition timing control method in the ignition device;
The primary winding voltage of the primary winding of the output waveform that causes the reverse voltage component to be continuous before and after one forward voltage component, and the primary winding voltage of the pickup coil provided along with the primary winding, The pickup coil voltage that is synchronously output in the same phase is full-wave rectified to obtain a primary winding rectification voltage and a pickup coil rectification voltage;
The voltage values of the first voltage, the second voltage, and the third voltage arranged in the order of the pickup coil rectified voltage correspond to the value of the primary winding rectified voltage that can obtain a continuous ignition operation in advance. A period detection signal is generated at each of the first period start point, the second period start point, and the third period start point when the set period detection voltage value is reached, and the period is measured according to the period detection signal. Determining the rotational speed,
If the rotational speed does not reach the preset advance rotational speed, outputting an ignition signal for turning on the second semiconductor switch after the timer time counted from the start time of the second period;
When the rotational speed has reached the advance rotational speed, outputting an ignition signal after the timer time counted from the start time of the first cycle,
Set each timer time according to the detected rotation speed,
It is in.

  In the first aspect of the invention, since the rotation speed is obtained by measuring the period from the pickup coil rectified voltage of the pickup coil, the fluctuation of the power generation capacity of the ignition coil and the pickup coil and the fluctuation of the air gap are detected for the rotation speed. This does not affect voltage variation due to the above.

  The output of the ignition signal for turning on the second semiconductor switch, that is, for performing the ignition operation, is a timer that is set whether counting from the start time for the second cycle or counting from the start time for the first cycle Although it is output after the time, this timer time is set according to the determined rotational speed, so the ignition time can be set freely and can be set to a time when efficient combustion can be obtained. .

  The invention according to claim 2 is the primary winding rectified voltage in which the voltage value for the first voltage and the second voltage of the pickup coil rectified voltage can obtain an ignition operation in the configuration of the invention according to claim 1. If the voltage falls to a preset lower limit voltage value corresponding to the minimum voltage value, the ignition signal is output without waiting for the timer period to expire from the start time of the first cycle and the start time of the second cycle. , Is added.

  In the second aspect of the invention, the primary winding rectified voltage is constantly monitored, and the ignition operation is performed within the range in which the voltage value of the primary winding rectified voltage is within the range where the ignition operation can be obtained. Thus, the ignition operation is stably and reliably obtained.

  The invention according to claim 3 is the configuration of the invention according to claim 1 or 2, wherein the timer time counted from the start time for the first period and the start time for the second period is shortened as the rotational speed increases. Is added.

  In the third aspect of the invention, the setting according to the rotational speed detected by the timer time is set to advance the ignition timing according to the increase in the rotational speed, whereby the internal combustion engine is rotated smoothly and efficiently. I will let you.

  The invention according to claim 4 is the structure of the invention according to claim 1, 2 or 3, wherein each period is measured from the time interval at the start of each period when the period detection signal is output, and the period obtained this time If the minute is sufficiently longer than the previous cycle, the end point of the current cycle is determined as the start point of the first cycle, and the end point of the cycle obtained this time is started for the first cycle. When it is determined that it is not a time point and the start time point for the first period is detected, the end time point for the period obtained this time is determined as the start time point for the second period. .

  According to the fourth aspect of the present invention, regardless of the change in the rotation speed, one cycle of the pickup coil rectified voltage is equal to the period from the start point of the first period to the start point of the second period, and the second period. Compared with the period from the minute start point to the third period start point, the period from the third cycle start point of one cycle of the pickup coil rectified voltage to the start point of the first cycle of the next cycle On the basis of the fact that is sufficiently long, the start time for the first period of each cycle is accurately and reliably detected.

  In addition, since the start time for the second period is detected according to the start time for the first period that can be accurately and reliably detected, the detection of the start time for the second period is also accurate and reliable.

Further, among the present invention, the configuration of the invention according to claim 5 is:
A series circuit of a first semiconductor switch and a current detection resistor is connected in parallel to the primary winding of the ignition coil, and a second semiconductor switch is connected to the first semiconductor switch. For an induction discharge type internal combustion engine that turns off the semiconductor switch to suddenly cut off the primary short-circuit current flowing in the primary winding and generate a spark discharge in the spark plug connected to the secondary winding of the ignition coil The primary winding voltage of the primary winding of the output waveform that continues the reverse voltage component before and after one forward voltage component, and the pickup coil that is attached to the primary winding, which is assembled to the ignition device Of the primary winding rectified voltage and the pickup coil rectified voltage obtained by full-wave rectification of the pickup coil voltage output in phase with the primary winding voltage, the internal from the pickup coil rectified voltage An ignition timing control device that measures the rotational speed of the engine and outputs an ignition signal as a trigger signal to the second semiconductor switch according to the rotational speed or the value of the pickup coil rectified voltage corresponding to the primary winding rectified voltage. ,
A constant voltage power supply unit, a microcomputer unit, a periodic signal generation unit, and a voltage detection unit;
The constant voltage power supply unit shall be charged with the rectified output of the power supply coil provided along with the primary winding, and the output of a constant voltage value shall be supplied to the microcomputer unit, the periodic signal generation unit and the voltage detection unit. ,
The periodic signal generator corresponds to the value of the primary winding rectified voltage at which the first voltage, the second voltage, and the third voltage of the pickup coil rectified voltage can obtain a continuous ignition operation. A cycle detection signal is generated at each of the first cycle start time, the second cycle start time, and the third cycle start time that has reached a preset cycle detection voltage value.
The voltage detector shall output the pickup coil rectified voltage as a voltage signal,
The microcomputer unit measures the rotation speed from one period, which is the time from the period detection signal obtained for the first voltage to the period detection signal obtained for the next first voltage, and the measured rotation speed is preset. If the advanced rotational speed has not been reached, an ignition signal is output after the timer time counted from the start of the second period, and if the measured rotational speed has reached the advanced rotational speed, the first The ignition signal is output after the timer time counted from the start of the period, and the voltage value of the first voltage and the second voltage from the voltage signal is the lowest primary winding rectified voltage that can obtain the ignition operation. If the voltage falls to a preset lower limit voltage value corresponding to the voltage value, the ignition signal is output without waiting for the timer period to expire from the start time of the first cycle and the start time of the second cycle. thing,
It is in.

  In this invention, the primary winding voltage of the primary winding of the ignition coil is full-wave rectified to obtain the primary winding rectified voltage, and the ignition operation is performed according to the primary winding rectified voltage. Therefore, the ignition operation is always performed in accordance with the electric power of a single polarity, and therefore, only one ignition circuit is required for the ignition operation.

  Since the periodic detection signal and the voltage signal are obtained separately by the dedicated periodic signal generator and the voltage detector, respectively, the circuit configuration of the periodic signal generator and the voltage detector is simplified. Can be obtained accurately and stably.

  In addition, the microcomputer unit, the periodic signal generation unit, and the voltage detection unit are commonly supplied with a constant voltage value output from a single constant voltage power supply unit to create and process the periodic detection signal and voltage signal. Therefore, signal processing in the microcomputer unit can be achieved easily, accurately and stably.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the invention according to claim 1, since the rotation speed can be detected without being affected by variations in the voltages of the ignition coil and the pickup coil, the rotation speed can be stably and accurately detected. This makes it possible to obtain good ignition timing advance control.

  Since the timer time for setting the ignition time is set according to the obtained rotational speed, it is possible to set the ignition time to a time at which efficient combustion can be obtained, thereby improving the efficiency of the internal combustion engine. Operation can be obtained.

  In the invention according to the second aspect, since the ignition operation can be obtained stably and reliably, the stable operation of the internal combustion engine can be obtained.

  In the invention according to claim 3, since the ignition timing is advanced as the rotational speed increases, the internal combustion engine can be rotated smoothly and efficiently.

  In the invention of claim 4, the start time for the first period can be accurately detected from the time length of each period obtained from the input period detection signal, and this accurate detection is possible. Since the start time for the second cycle is detected based on the start time for the first cycle, the detection of the start time for the second cycle can be accurately achieved, and thereby the rotation speed can be accurately measured. become.

  In the invention of claim 5, since the ignition operation can be achieved with one ignition circuit, and the circuit configuration of the periodic signal generator and the voltage detector can be simplified, the overall configuration of the ignition device The manufacturing cost can be reduced accordingly.

  In addition, the period detection signal and the voltage signal can be obtained accurately and stably, and the signal processing in the microcomputer unit can be achieved easily and accurately and stably. Can be obtained without difficulty.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an electric circuit diagram showing a configuration example of an ignition point control device 1 according to the present invention, which is combined with an induction discharge ignition circuit 30 to constitute an ignition device for an internal combustion engine. The ignition point control device 1 has a constant voltage The power supply unit 2, the microcomputer unit 9, the periodic signal generation unit 12, and the voltage detection unit 19 are configured.

  The primary coil 25 of the ignition coil 24 is provided with a pickup coil 27 and a power supply coil 28. The pickup coil 27 is smaller than the primary coil voltage of the primary coil 25, but is synchronous. Then, the pickup coil voltage E1 having the same phase is output. The pickup coil voltage E1 is rectified to the pickup coil rectification voltage E2 by the first full-wave rectification circuit 36 and supplied to the periodic signal generation unit 12 and the voltage detection unit 19. Ru

  Since the primary winding 25 and the pickup coil 27 both induce a primary winding voltage and a pickup coil voltage E1 having an output waveform that makes the reverse voltage portion continuous before and after one forward voltage portion, full-wave rectification is performed. The primary winding rectified voltage D and the pickup coil rectified voltage E2 thus formed have a voltage waveform having three voltage components that are continuous with a constant polarity.

  An ignition circuit 30 to which the ignition timing control device 1 is attached is connected to a primary winding 25 of an ignition coil 24 having a secondary winding connected to an ignition plug 26 via a second full-wave rectifier circuit 37. A series circuit of a first semiconductor switch 31 that is a transistor and a current detection resistor 32, a bias resistor 33, and a second semiconductor switch 34 that is a thyristor having a gate resistor 35 connected between the gate and the cathode, Are connected in parallel, and the anode of the second semiconductor switch 34 is connected to the base of the first semiconductor switch 31.

  In the ignition circuit 30, when a voltage is induced in the primary winding 25 of the ignition coil 24 due to the operation of the internal combustion engine, the first semiconductor switch 31 is turned on in accordance with the induced voltage, and the primary winding 25 is in the primary winding 25. When a short-circuit current is passed and the second semiconductor switch 34 is turned on from this state, the first semiconductor switch 31 is turned off because its base current is bypassed, and the primary short-circuit current is suddenly cut off. A high voltage is induced in the next winding to generate a spark discharge in the spark plug 26 to perform an ignition operation.

  The constant voltage power supply unit 2 of the ignition timing control device 1 charges the generated power of the power supply coil 28 provided in parallel with the primary winding 25 of the ignition coil 24, and outputs a constant voltage value to the microcomputer unit 9 to generate a periodic signal. The power of the power supply coil 28 rectified by the rectifier diode 29 is charged to the power supply capacitor 3 connected in parallel with the overvoltage prevention zener diode 4, and this charging voltage is supplied in advance. When the set constant voltage value is reached, the voltage stabilizing transistor 5 having the voltage stabilizing Zener diode 6 and the base resistor 7 connected to the base becomes conductive, and outputs 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 10 of the microcomputer unit 9, specifically, 5 V, thereby causing a 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 9 is composed mainly of the microcomputer 10, detects that the output voltage value of the constant voltage power supply unit 2 has reached a preset constant value, and instructs a reset port from a reset IC (not shown). The ignition signal s3, which is a trigger signal, is output to the gate of the second semiconductor switch 34 via the ignition signal supply resistor 11.

  The periodic signal generation unit 12 supplies a constant voltage signal from the constant voltage power supply unit 2 to the signal generation semiconductor switch 13 which is a transistor via the waveform shaping resistor 17, and the detection connected to the base of the signal generation semiconductor switch 13. If the pickup coil rectified voltage E2 exceeds a preset period detection voltage value v1 by the series circuit of the Zener diode 14 and the voltage detection resistor 15, the signal generating semiconductor in which the operation stabilization resistor 16 is connected between the base and the emitter. The switch 13 is turned on, and the potential at the connection point between the signal generating semiconductor switch 13 and the waveform shaping resistor 17 is output to the microcomputer unit 9 as the cycle detection signal s1.

  The voltage detection unit 19 adds the pickup coil rectified voltage E2 to the series circuit of the voltage setting voltage dividing resistors 20 and 21, and the voltage at the voltage dividing point of both the voltage setting voltage dividing resistors 20 and 21 is the voltage signal s2 (in FIG. 2). b)) and output to the microcomputer unit 9. A noise removing capacitor 22 is connected between the voltage dividing point of both voltage setting voltage dividing resistors 20 and 21 and the ground, and the voltage dividing point of both voltage setting voltage dividing resistors 20 and 21 and the constant voltage power supply unit. A protective diode 23 is connected between the two output terminals.

  The period detection voltage value v1 set by the period signal generator 12 is a pickup corresponding to the value of the primary winding rectified voltage D obtained at a rotational speed at which the internal combustion engine can be started stably, for example, about 40V. Although the value of the coil rectified voltage E2 is set, the constant voltage output signal of the constant voltage power supply unit 2 is output before and after the value of the pickup coil rectified voltage E2 first reaches the period detection voltage value v1. Therefore, the microcomputer 10 is started up almost simultaneously with the output of the first cycle detection signal s1.

  Since one cycle of the pickup coil rectified voltage E2 is composed of three voltages, that is, a first voltage e1, a second voltage e2, and a third voltage e3 (see b in FIG. 2), the period detection signal s1 is the first period start time t1 when the first voltage e1 reaches the period detection voltage value v1 and the second voltage e2 reaches the period detection voltage value v1 during one cycle. It is output at each of the three time points of the second cycle start time t2 and the third cycle start time t3, which is the time point when the third voltage component e3 reaches the cycle detection voltage value v1 (see c in FIG. 2). Become.

  The microcomputer 10 measures the time from the first cycle start time t1 to the second cycle start time t2, and calculates the first cycle T1 from the second cycle start time t2 to the third cycle start time t3. The time is measured to obtain the second period T2, and the time from the third period start time t3 to the first period start time t1 of the next cycle is obtained to obtain the third period T3. The period T, that is, the rotation speed is calculated by adding the period T1, the second period T2, and the third period T3.

  Further, the microcomputer 10 compares the calculated rotation speed with a preset advance rotation speed n, and when the calculated rotation speed does not reach the advance rotation speed n, the start time t2 for the second period. On the contrary, when the calculated rotational speed reaches the advance rotational speed n, the timer time corresponding to the rotational speed, which is the time from the start time t1 for the first period until the ignition signal s3 is output, is set. Then, it is determined by selecting from a large number of data stored in advance.

  That is, when the calculated rotation speed does not reach the advance rotation speed n, the ignition operation is performed at the second voltage d2 of the primary winding rectified voltage D (see a, b, and c in FIG. 3). Thus, the obtained advance angle characteristic becomes the second voltage component region f2 that gradually advances to the lag-side ignition time point z1 shown in FIG. 4, and when the calculated rotation speed reaches the advance rotation speed n, the primary voltage is obtained. Since the ignition operation is performed by the first voltage component d1 of the winding rectified voltage D (see d, e, and f in FIG. 3), the obtained advance angle characteristic is only the advance angle width z with respect to the delay side ignition time point z1. The first voltage component region f1 gradually advances from the advanced ignition timing z2 that has advanced.

  Therefore, as shown in FIG. 4, the obtained advance angle characteristic curve F has a large advance angle when the advance operation that gradually advances as the rotation speed increases reaches the advance rotation speed n. The width z is abruptly stepped up.

  Furthermore, when the voltage signal s2 from the voltage detector 19 is input, the microcomputer 10 inputs the voltage signal s2 to the A / D converter, and sets the minimum voltage value of the primary winding rectified voltage D that can obtain the ignition operation. When the value of the voltage signal s2 is reduced to the lower limit voltage value v2 as compared with the corresponding lower limit voltage value v2 that is the value of the pickup coil rectification voltage E2, the timer time is not increased. Ignition signal s3 is output.

Next, operation | movement of an ignition device is demonstrated in order from the time of starting.
When the internal combustion engine starts to rotate, a constant voltage is output from the constant voltage power supply unit 2 that has been activated by the voltage induced in the power supply coil 28, and this output is input by the microcomputer 10 of the microcomputer unit 9 to start up. .

  The microcomputer 10 of the microcomputer unit 9 starts up at step g1 in the main routine (see FIG. 5), enters the standby state of step g2 after initial setting, but at this time, the period measurement interrupt routine (see FIG. 6) starts. It is possible.

  From this state, when the first cycle detection signal s1 is input to the microcomputer unit 9, the cycle measurement interrupt routine starts in step h1, confirms the input of the cycle detection signal s1 in step h2, and then in step h3 Measurement is performed for the period according to the input of the period detection signal s1, but since it is the first time, the measurement cannot be performed. Through “NO” in h9, the process returns from step h13 to point a in the main routine.

  When returning to point a, it is determined in step g3 whether or not there is an RPM calculation request.

  When the next cycle detection signal s1 is input, in step h2, after the input time is confirmed, in step h3, the time from the previous time to the current time is measured, and according to the result, in steps h4 and h5. Then, it is determined whether or not the current time point is the start time point t1 for the first period.

  The determination of “whether or not the current time point is the start time point t1 for the first cycle” in the steps h4 and h5 is sufficient for the length of the cycle measured this time compared to the length of the cycle time measured last time. However, when the previous period detection signal s1 was input, measurement for the period could not be performed, so that “NO” in step h5 is used as in the previous period. Through “NO” in step h9, the process returns from step h13 to point a and then returns to step g2.

  Further, when the next cycle detection signal s1 is input, after confirming the input time in step h2, the time from the previous time to the current time is measured in step h3, and according to the result, in steps h4 and h5, It is determined whether or not the current time point is the start time point t1 for the first cycle. However, since the cycle time measured this time is not sufficiently longer than the surrounding time measured last time, It is determined that it is not the minute start time t1, ”through“ NO ”in step h5 through“ NO ”in step h9, the process returns from step h13 to point a and then returns to step g2.

  When the next cycle detection signal s1 is input, after confirming the input time in step h2, the time from the previous time to the current time is measured in step h3, and in accordance with the result, in steps h4 and h5. It is determined whether or not the current time point is the start time point t1 for the first cycle. However, since the cycle time measured this time is sufficiently longer than the previously measured surrounding content, It is determined that “the minute start time t1”, and from “YES” in step h5, the process proceeds to step 6 to perform cycle calculation (T = T1 + T2 + T3) to measure the cycle T, and subsequently in step h7, the rotational speed calculation request set is set. In step h8, the start point detection flag is set for the first cycle, and the process returns from step h13 to point a.

  When the process proceeds from point A to step g3, “rotation speed calculation is requested”, “YES” in step g3 is followed by “rotation speed calculation” in step g4.

  This "rotational speed calculation" calculates the rotational speed from the period T measured in step i1 of the rotational speed calculation routine shown in FIG. 7, and in step i2, this calculated rotational speed is set to a predetermined advance rotational speed n and If the calculated rotational speed has not reached the advance rotational speed n, the process proceeds from "NO" in step i2 to step i5, and the timer from the start time t2 for the second period corresponding to the calculated rotational speed. If the calculated rotational speed has reached the advance rotational speed n, the time is selected and set, and the process proceeds to step i3 to select the timer time from the start time t1 for the first cycle corresponding to the calculated rotational speed. Then, in step i4, an A / D interrupt is instructed, and in step i6, the process returns to point i.

  When the cycle detection signal s1 is input to the microcomputer 10 from this state, it is determined in steps h4 and h5 of the cycle measurement routine that the input time point is not the start time point t1 for the first cycle, so the process proceeds to step h9. The presence / absence of the start point detection flag for the first period is determined.

  Since the start point detection flag for the first period is set, the process proceeds to step h10, and the start point detection flag for the first period is reset in step h11 assuming that the current input point is the start point t2 for the second period. Then, in step h12, the timer time from the start time t2 of the second period selected and set is set, the process returns to point a from step h13, and the A / D routine and the ignition time timer routine start simultaneously.

  In the ignition point timer routine, after starting in step k1, it is determined in step k2 whether or not the output of the ignition signal s3 has been completed. If completed, the process proceeds to step k5 and returns to step k1. However, if it has not been completed, the process proceeds to step k3, where it is determined whether or not the selected timer time has expired.

  If the timer time has not expired, the process proceeds to step k5, returns to step k1, repeats the determination processing of steps k2 and k3, and if it is determined in step k3 that the timer time has expired, It progresses to k4, outputs the ignition signal s3, performs ignition operation, progresses to step k5, and returns to step k1.

In the A / D routine started in step j1, in step j2, the value of the input voltage signal s2 is compared with a preset lower limit voltage value v2, and in step j3, the value of the voltage signal s2 is changed to the lower limit voltage. It is determined whether or not the value has decreased to the value v2. If it is determined that the value has not decreased , the process proceeds from "NO" in step j3 to step j6, returns to step j1, and repeats this operation.

If it is determined in step j3 that the value of the voltage signal s2 has dropped to the lower limit voltage value v2, the process proceeds from “YES” in step j3 to step j4 to forcibly output the ignition signal s3 and The operation is performed, and the process proceeds to step j5 as it is to prohibit interruption of the ignition point timer routine, and then proceeds to step j6 and returns to step j1.

  As described above, after the ignition operation is performed, the period measurement routine again detects the start time t1 for the first period, and counts the timer time from the start time t2 for the second period. However, when the rotation speed increases and reaches the advance rotation speed n, the process proceeds from step j2 to step i3 of the rotation speed calculation routine, and the timer period from the start time t1 for the first period is set. The ignition operation is performed in the first voltage component region f1 that calculates and counts the timer time from the start time t1 for the first period.

It is an electric circuit diagram showing an embodiment of the present invention. It is explanatory drawing which shows the operation timing at the start time of each period. It is explanatory drawing which shows the operation | movement at the ignition time advanced. It is an advance characteristic curve which shows the advance operation | movement obtained. It is a flowchart of the main routine in a microcomputer. It is a flowchart of the period measurement routine in a microcomputer. It is a flowchart of the rotational speed calculation routine in a microcomputer. It is a flowchart of the A / D routine in a microcomputer. It is a flowchart of the ignition time timer routine in a microcomputer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Ignition time control apparatus 2; Constant voltage power supply part 3; Power supply capacitor 4; Overvoltage prevention zener diode 5; Voltage stabilization transistor 6; Voltage stabilization zener diode 7; Base resistance 8; Noise removal capacitor 9; Microcomputer 11; Ignition signal supply resistor 12; Periodic signal generator 13; Signal generator semiconductor switch 14; Detection Zener diode 15; Voltage detection resistor 16; Operation stabilization resistor 17; Waveform shaping resistor 18; Protection resistor 19; Voltage setting voltage dividing resistor 21; Voltage setting voltage dividing resistor 22; Noise removal capacitor 23; Unprotected Aode 24; Ignition coil 25; Primary winding 26; Spark plug 27; Pickup coil 28; Power supply coil 29; Rectifier diode 30; Ignition circuit 31; First semiconductor switch 32; current sensing resistor 33; bias resistor 34; second semiconductor switch 35; gate resistor 36; first full-wave rectifier circuit 37; second full-wave rectifier circuit D; primary winding rectified voltage d1; 1 voltage component d2; second voltage component E1; pickup coil voltage E2; pickup coil rectified voltage e1; first voltage component e2; second voltage component e3; third voltage component v1; period detection voltage value v2; Period T1; first period T2; second period t1; first period start time t2; second period start time t3; third period start time s1; period detection signal s2; voltage signal s3; ignition Signal F; Lead angle characteristic curve f1; First voltage component region f2; Second voltage component region z; Lead angle width z1; Delay side ignition timing z2; Lead side ignition timing n; Advance rotation speed

Claims (5)

  A series circuit of a first semiconductor switch (31) and a current detection resistor (32) is connected in parallel to the primary winding (25) of the ignition coil (24), and a second circuit is connected to the first semiconductor switch (31). The semiconductor switch (34) is connected, the first semiconductor switch (31) is turned off by turning on the second semiconductor switch (34), and the primary short-circuit current flowing in the primary winding (25) is rapidly increased. In an induction discharge internal combustion engine ignition device that generates a spark discharge in an ignition plug (26) connected to the secondary winding of the ignition coil (24), before and after one forward voltage, The primary winding voltage of the primary winding (25) of the output waveform that makes the reverse voltage component continuous, and the primary winding voltage of the pickup coil (27) provided along with the primary winding (25) Full-wave rectification of the pickup coil voltage (E1) output in the same phase in synchronization with the primary winding rectification voltage (D) and pickup coil rectification voltage (E2) The voltage values of the first voltage component (e1), the second voltage component (e2), and the third voltage component (e3) arranged in the order of the pickup coil rectified voltage (E2) can obtain a continuous ignition operation. The first period start time (t1), the second period start time (t2), which has reached a preset period detection voltage value (v1) corresponding to the value of the primary winding rectified voltage (D) that can be generated, and A period detection signal (s1) is generated at each time point of the third period start time (t3), the period (T) is measured according to the period detection signal (s1), and the rotation speed is obtained. If the set advance rotation speed (n) has not been reached, an ignition signal (s3) for turning on the second semiconductor switch (34) after the timer time counted from the start time (t2) for the second period When the rotation speed reaches the advance rotation speed (n), the ignition signal is output after the timer time counted from the start time (t1) for the first period. An ignition point control method for an internal combustion engine ignition device that outputs (s3) and sets each timer time according to the detected rotation speed.   The voltage value of the first voltage portion (e1) and the second voltage portion (e2) of the pickup coil rectified voltage (E2) is set to the minimum voltage value of the primary winding rectified voltage (D) that can obtain the ignition operation. If it falls to the preset lower limit voltage value (v2) in correspondence, the ignition signal will not wait for the timer time from the start time (t1) for the first cycle and the start time (t2) for the second cycle. The ignition point control method for an ignition device for an internal combustion engine according to claim 1, wherein (s3) is output.   The ignition timing control of the internal combustion engine ignition device according to claim 1 or 2, wherein the timer time counted from the first cycle start time (t1) and the second cycle start time (t2) is shortened as the rotational speed increases. Method.   Measure the period from the time interval at the start of each period when the period detection signal (s1) is output, and if the period obtained this time is sufficiently longer than the period obtained last time, Is determined to be the first cycle start time (t1), and the current cycle end time is determined not to be the first cycle start time (t1), and the first cycle start 4. The internal combustion engine ignition apparatus according to claim 1, wherein when the time point (t1) is detected, the end point of the cycle obtained this time is determined as the start point (t2) of the second cycle. Ignition point control method.   A series circuit of a first semiconductor switch (31) and a current detection resistor (32) is connected in parallel to the primary winding (25) of the ignition coil (24), and a second circuit is connected to the first semiconductor switch (31). The semiconductor switch (34) is connected, the first semiconductor switch (31) is turned off by turning on the second semiconductor switch (34), and the primary short-circuit current flowing in the primary winding (25) is rapidly increased. The spark plug (26) connected to the secondary winding of the ignition coil (24) is assembled to an ignition device for an induction discharge type internal combustion engine that generates a spark discharge. The primary winding voltage of the primary winding (25) of the output waveform that makes the reverse voltage component continuous before and after, and the primary winding of the pickup coil (27) provided along with the primary winding (25) Primary winding rectified voltage (D) and pickup coil obtained by full-wave rectification of pickup coil voltage (E1) output in phase with the winding voltage in phase Of the rectified voltage (E2), the rotational speed of the internal combustion engine is measured from the pickup coil rectified voltage (E2), and the pickup coil rectified voltage (E2) corresponding to the rotational speed or the primary winding rectified voltage (D) An ignition timing control device (1) that outputs an ignition signal (s3) as a trigger signal to the second semiconductor switch (34) according to the value of the constant voltage power supply unit (2) and the microcomputer unit (9) And a periodic signal generator (12) and a voltage detector (19), and the constant voltage power supply (2) is rectified by a power supply coil (28) provided along with the primary winding (25). The output of a constant voltage value is supplied to the microcomputer unit (9), the periodic signal generation unit (12) and the voltage detection unit (19), and the periodic signal generation unit (12) To obtain a continuous ignition operation with the voltage values of the first voltage component (e1), the second voltage component (e2) and the third voltage component (e3) of the pickup coil rectified voltage (E2). The first period start time (t1), the second period start time (t2), which has reached a preset period detection voltage value (v1) corresponding to the value of the primary winding rectified voltage (D) that can be generated, and The period detection signal (s1) is generated at each point of the third period start point (t3), and the voltage detection unit (19) outputs the pickup coil rectified voltage (E2) as a voltage signal (s2). The microcomputer unit (9) is connected from the cycle detection signal (s1) obtained by the first voltage component (e1) to the cycle detection signal (s1) obtained by the next first voltage component (e1). Rotational speed is measured from one period (T), which is time, and if the measured rotational speed has not reached the preset advance rotational speed (n), the start time (t2) for the second period The ignition signal (s3) is output after the timer time counted from, and if the measured rotational speed has reached the advance rotational speed (n), the count is started from the start time (t1) for the first period. The ignition signal (s3) is output after the timer time, and the voltage value of the first voltage component (e1) and the second voltage component (e2) can obtain the ignition operation from the voltage signal (s2). If the voltage drops to the preset lower limit voltage value (v2) corresponding to the minimum voltage value of the primary winding rectified voltage (D), the first cycle start time (t1) and the second cycle start time ( An ignition timing control device for an internal combustion engine ignition device that outputs an ignition signal (s3) without waiting for the timer time from t2) to expire.

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