JP2017125482A - Ignition device, control method of the same and internal combustion engine driven system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To judge whether an internal combustion engine is normal or not with a fewer number of calculations than heretofore.SOLUTION: An ignition device 1 includes: a pulse detection part 2 for detecting pulses G1, G2, G3 of the same polarity respectively corresponding to reluctors 22a, 22b, 22c provided on an outer circumference of a rotator 22; and a control part 3 which performs ignition control of an internal combustion engine based on the pulses G1, G2, G3. Therein, the control part 3 has a pulse interval calculation part 31 which, when detecting the pulse G2, calculates a time T1 between the pulse G1 and the pulse G2, when detecting the pulse G3, calculates a time T2 between the pulse G2 and the pulse G3 and, when detecting the pulse G1, calculates a time T3 between the pulse G3 and the pulse G1, and a judgement part 32 which, when the time T1, time T2 and time T3 satisfy a magnitude relation based on installed positions of the reluctors 22a, 22b, 22c, judges that the internal combustion engine is normal and, when such a magnitude relation is not satisfied, judges that the internal combustion engine is abnormal.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ignition device, a control method thereof, and an internal combustion engine drive system.

  2. Description of the Related Art Conventionally, an ignition device that ignites an internal combustion engine by applying a high voltage to an ignition plug via an ignition coil to discharge the ignition plug is known. For example, Patent Literature 1 describes a transistor type ignition device and a CDI (Capacitor Discharge Ignition) ignition device.

  Further, as described in Patent Document 2, two reluctors, that is, a first relucter and a second reluctor are provided along the circumferential direction on the outer periphery of the rotor of the conventional AC generator. Yes. As shown in FIG. 5, the pickup coil (also referred to as a pulsar coil) detects the front end portion and the rear end portion of each relucter and outputs positive and negative pulses, respectively. The ignition device detects a pulse output from the pickup coil. In FIG. 5, detection point A is the timing when the front end of the first or second reluctator passes, and detection point B is the timing when the rear end of the second reluctator passes. Times T1, T2, T3, and T4 indicate times between adjacent pulses.

  The width of the pulse output from the pickup coil varies depending on the rotational speed of the rotor of the AC generator. For example, as shown in FIG. 5, the pulse width becomes longer in the compression stroke and the exhaust stroke where the rotational speed of the internal combustion engine is relatively small, and the pulse width becomes shorter in the intake stroke and the expansion stroke where the rotational speed of the internal combustion engine is relatively large. .

JP 2013-181395 A JP 2012-163044 A

  Conventionally, whether or not the internal combustion engine is abnormal (for example, reverse rotation or the like) is determined based on whether or not the time T1 to T4 between pulses satisfies a predetermined formula. For example, the conventional ignition device determines that the internal combustion engine is normal if both of the two determination conditional expressions T4 ≧ T2 × 2 and T4 ≧ T3 × 2 are satisfied at the detection point A in FIG. If the two unnecessary expressions were not satisfied, it was determined that the internal combustion engine was abnormal. Further, at the detection point B, when the rotational speed of the internal combustion engine is equal to or less than the reference rotational speed, it is determined that the internal combustion engine is normal if T1 × 2 <T3 is satisfied, and otherwise, the internal combustion engine is determined to be abnormal. Was. On the other hand, when the rotational speed is higher than the reference rotational speed, it is determined that the internal combustion engine is normal if T1 × 1.5 <T3 is satisfied, and otherwise, the internal combustion engine is determined to be abnormal.

  Thus, in the conventional ignition device, when determining the state of the internal combustion engine, the time between pulses is multiplied by a predetermined number of times (1.5 times, 2 times, etc.), or the magnitude comparison is performed, or the internal combustion engine It was necessary to use different conditional expressions depending on the number of rotations. For this reason, there has been a problem that the number of calculations by the microprocessor (CPU) of the ignition device is large.

  Therefore, an object of the present invention is to provide an ignition device, a control method thereof, and an internal combustion engine drive system that can determine whether or not the internal combustion engine is normal with a smaller number of computations than in the past.

The ignition device according to the present invention includes:
An ignition device for igniting an internal combustion engine,
The same corresponding to each of the first, second, and third relaxors provided at irregular intervals along the circumferential direction on the outer periphery of the rotor of the AC generator driven by the internal combustion engine to generate electric power A pulse detector for detecting a first pulse, a second pulse and a third pulse of polarity;
A control unit that performs ignition control of the internal combustion engine based on the first to third pulses detected by the pulse detection unit,
The controller is
When the second pulse is detected, a first time between the first pulse and the second pulse is calculated, and when the third pulse is detected, the second pulse and the second pulse are calculated. A pulse interval for calculating a second time between the third pulse and calculating a third time between the third pulse and the first pulse when the first pulse is detected. A calculation unit;
The internal combustion engine when the first time, the second time, and the third time calculated by the pulse interval calculation unit satisfy a magnitude relationship based on the installation positions of the first to third reluctors And a determination unit that determines that the internal combustion engine is abnormal when it does not satisfy the magnitude relationship.

In the ignition device,
The magnitude relationship may be a relationship of Formula (1).
T1 <T2 <T3 (1)
Here, T1 is the first time, T2 is the second time, and T3 is the third time.

In the ignition device,
When the determination unit determines that the internal combustion engine is abnormal, the control unit may not ignite the internal combustion engine.

In the ignition device,
The determination unit performs the first time, the second time, and the third time each time the pulse detection unit detects the first pulse, the second pulse, or the third pulse. It may be determined whether time satisfies the magnitude relationship.

In the ignition device,
The controller is
The first rotation of the internal combustion engine based on the time from the first detection of the first pulse to the detection of the current time until the detection of the second pulse after the detection of the first pulse. Calculate the number,
From the detection of the second pulse to the detection of the third pulse, the ignition timing of the internal combustion engine is calculated based on the first rotational speed,
The second rotation of the internal combustion engine based on the time from when the third pulse is detected until the first pulse is detected until the first pulse is detected after the third pulse is detected. A number may be calculated, and the energization timing may be calculated based on the second rotational speed.

The control method of the ignition device according to the present invention includes:
Same polarity corresponding to the first, second, and third relucters provided at irregular intervals along the circumferential direction on the outer periphery of the rotor of the alternator driven by the internal combustion engine to generate electric power A pulse detection unit for detecting the first pulse, the second pulse, and the third pulse, and ignition control of the internal combustion engine based on the first to third pulses detected by the pulse detection unit A control method of an ignition device comprising a control unit,
When the second pulse is detected, a first time between the first pulse and the second pulse is calculated, and when the third pulse is detected, the second pulse and the second pulse are calculated. Calculating a second time between the third pulse and, if the first pulse is detected, calculating a third time between the third pulse and the first pulse; ,
It is determined that the internal combustion engine is normal when the calculated first time, the second time, and the third time satisfy a magnitude relationship based on the installation positions of the first to third relaxors. And determining that the internal combustion engine is abnormal when the magnitude relationship is not satisfied,
It is characterized by providing.

An internal combustion engine drive system according to the present invention includes:
An alternating current that has a rotor and first and second, and third, non-uniformly spaced circumferentially arranged outer circumferences of the rotor and that is driven by an internal combustion engine to generate electric power A generator,
An internal combustion engine drive system comprising: an ignition device for igniting the internal combustion engine;
The ignition device is
A pulse detector for detecting the first to third pulses of the same polarity corresponding to the first to third reluctors,
A control unit that performs ignition control of the internal combustion engine based on the first to third pulses detected by the pulse detection unit,
The controller is
When the second pulse is detected, a first time between the first pulse and the second pulse is calculated, and when the third pulse is detected, the second pulse and the second pulse are calculated. A pulse interval for calculating a second time between the third pulse and calculating a third time between the third pulse and the first pulse when the first pulse is detected. A calculation unit;
The internal combustion engine when the first time, the second time, and the third time calculated by the pulse interval calculation unit satisfy a magnitude relationship based on the installation positions of the first to third reluctors And a determination unit that determines that the internal combustion engine is abnormal when it does not satisfy the magnitude relationship.

In the internal combustion engine drive system,
The first relaxor, the second relaxor and the third relaxor are arranged along the rotation direction of the rotor in the order of the first relaxor, the second relaxor and the third relaxor, The first circumferential interval between the first and second relaxors is smaller than the second circumferential interval between the second and third relaxors, and The circumferential interval of 2 may be smaller than the third circumferential interval between the third relaxor and the first relaxor.

In the internal combustion engine drive system,
The second circumferential interval may be three times or more of the first circumferential interval, and the third circumferential interval may be three or more times of the second circumferential interval.

In the internal combustion engine drive system,
The ratio between the first circumferential interval, the second circumferential interval, and the third circumferential interval may be 1: 4: 19.

  In the present invention, the pulse detectors correspond to first to third reluctors provided at irregular intervals along the circumferential direction on the outer periphery of the rotor of the AC generator driven by the internal combustion engine to generate power, First to third pulses having the same polarity are detected. Then, the pulse interval calculation unit has a first time that is a time between the first pulse and the second pulse, a second time that is a time between the second pulse and the third pulse, A third time that is a time between the third pulse and the first pulse is calculated. Whether or not the internal combustion engine is normal depending on whether or not the first to third times calculated by the pulse interval calculation unit satisfy the magnitude relationship based on the installation positions of the first to third relaxors. Determine if it is abnormal. That is, in the present invention, it is determined whether or not the internal combustion engine is normal by directly comparing the time between pulses.

  Therefore, according to the present invention, it is possible to determine whether or not the internal combustion engine is normal with a smaller number of calculations than before.

1 is a diagram showing a schematic configuration of an internal combustion engine drive system according to an embodiment of the present invention. (A) is the figure which looked at the rotor 22 of the alternating current generator 21 in the rotating shaft direction, (b) is the elements on larger scale of (a). It is a functional block diagram of the control part 3 of the ignition device 1 which concerns on embodiment. It is a timing chart which shows the stroke of an internal-combustion engine, the pulse by reluctors 22a, 22b, and 22c, and a control signal. It is a timing chart which shows the stroke of an internal-combustion engine in the conventional internal-combustion-engine drive system, and the pulse by the 1st and 2nd reluctators.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The internal combustion engine drive system according to the embodiment is used to drive, for example, a four-cycle engine for a motorcycle. In addition, this invention is applicable not only to this but other vehicles, such as a four-wheeled vehicle, and a 2-cycle engine. In the following description of the embodiment, the characteristic features of the present invention will be described in detail. However, other known techniques can be appropriately applied to general technical matters related to the ignition device.

  As shown in FIG. 1, the internal combustion engine drive system according to the embodiment includes an ignition device 1, an AC generator (ACG) 21, a power supply device 23, a battery 24, a switch 25, a pickup coil 26, and an ignition. A coil 27 and a spark plug 28 are provided.

  The ignition device 1 is a device that ignites an internal combustion engine (not shown). The ignition device 1 of this embodiment is a so-called full transistor type ignition device. The ignition device 1 will be described in detail later. The ignition device 1 is not limited to the full transistor type, and may be a CDI ignition device, for example.

  The AC generator 21 is a generator that generates power by being driven by an internal combustion engine. More specifically, the AC generator 21 generates electric power by being driven to rotate in synchronization with the rotation of the internal combustion engine. As shown in FIG. 2A, the AC generator 21 includes a rotor 22 and reluctors 22a, 22b, and 22c. As the rotor 22 rotates in synchronization with a crankshaft (not shown) of the internal combustion engine, the AC generator 21 outputs an AC signal (AC voltage, AC current).

  The AC signal supplied from the AC generator 21 is supplied to the power supply device 23. This power supply device 23 rectifies the AC signal supplied from the AC generator 21, adjusts the voltage, and outputs it. The battery 24 is charged with a DC voltage output from the power supply device 23. The voltage of the battery 24 is supplied to the ignition device 1 via the switch 25.

  As shown in FIG. 2 (a), the rotor 22 of the AC generator 21 is provided with three retractors 22a, 22b, and 22c. More specifically, a reluctator 22 a (first reluctator), a reluctator 22 b (second reluctator), and a reluctator 22 c (third reluctator) are provided on the outer periphery of the rotor 22 along the circumferential direction. When viewed in the reverse rotation direction of the rotor 22, the relaxor 22 a, the relaxor 22 b, and the relaxor 22 c are arranged in the order of the relaxor 22 a, the relaxor 22 b, and the relaxor 22 c. That is, the retractor 22a, the relaxor 22b, and the retractor 22c are arranged so as to pass through the pickup coil 26 in the order of the retractor 22a, the relaxor 22b, and the relaxor 22c when the rotor 22 is rotationally driven by the internal combustion engine (crankshaft). Has been.

  When the reluctors 22a, 22b, and 22c pass near the pickup coil 26, a pulse is output from the pickup coil 26. Focusing on the reluctator 22a, as shown in FIG. 2 (b), the reluctator 22a has a front end Ea and a rear end Eb. When the retractor 22a passes, the pickup coil 26 generates a positive pulse corresponding to the front end Ea and a negative pulse corresponding to the rear end Eb. The same applies to the reluctors 22b and 22c. As shown in FIG. 4, the positive pulse G1 (first pulse), the pulse G2 (second pulse), and the pulse G3 (third pulse) are respectively passed through the reluctors 22a, 22b, and 22c. Generated.

  Note that the top dead center (TDC) of the crankshaft of the internal combustion engine is located, for example, between a crank position corresponding to the pulse G3 and a crank position corresponding to the pulse G1.

  As shown in FIG. 2A, the reluctors 22a, 22b, and 22c are provided at unequal intervals along the circumferential direction. More specifically, the circumferential interval L1 (first circumferential interval) between the relaxor 22a and the relaxor 22b is larger than the circumferential interval L2 (second circumferential interval) between the relaxor 22b and the relaxor 22c. small. And the circumferential direction distance L2 is smaller than the circumferential direction distance L3 (third circumferential direction distance) between the reluctators 22c and 22a. Here, the circumferential interval between the reluctors is the distance between the front ends of each reluctator. For example, the circumferential interval L1 is the distance between the front end portion of the reluctator 22a and the front end portion of the relucter 22b. The circumferential interval between the reluctors can be defined by the distance between the rear ends of each reluctator, but the pulse detection unit 2 of the present embodiment is configured to detect a positive pulse. Therefore, the distance between the front ends is defined.

  In the present embodiment, the ratio between the circumferential interval L1, the circumferential interval L2, and the circumferential interval L3 is 1: 4: 19. In terms of the central angle, the angle between the relucters 22a and 22b is 15 °, the angle between the reluctors 22b and 22c is 60 °, and the angle between the reluctors 22c and 22a is 285 °.

  The ignition coil 27 has a primary coil 27a and a secondary coil 27b. One end of the primary side coil 27 a and one end of the secondary side coil 27 b are both connected to the cathode of the diode D 1 of the ignition device 1. The other end of the primary coil 27a is connected to the collector of the transistor TR1 of the ignition device 1. The other end of the secondary coil 27b is connected to the spark plug 28.

  The spark plug 28 has a pair of electrodes facing each other, and is connected between the other end of the secondary coil 27b and the ground. The spark plug 28 generates a spark discharge in the gap between the electrodes due to the high voltage generated in the secondary coil 27b, and ignites the combustible mixed gas in the fuel chamber of the internal combustion engine.

  Next, the configuration of the ignition device 1 will be described in detail.

  As shown in FIG. 1, the ignition device 1 includes a diode D1, a capacitor C1, a transistor TR1, a pulse detection unit 2, a control unit 3, and an internal power supply circuit 4.

  In the diode D1, the voltage of the battery 24 is supplied to the anode via the switch 25. The capacitor C1 is connected between the cathode of the diode D1 and the ground. The diode D1 and the capacitor C1 function as a smoothing circuit that smoothes the input voltage to the ignition device 1.

  The transistor TR1 has a collector connected to the primary coil 27a of the ignition coil 27, an emitter grounded, and a base connected to the control unit 3. The transistor TR1 is controlled to be turned on or off by a control signal output from the control unit 3.

  The pulse detector 2 is connected to the pickup coil 26 and receives a pulse output from the pickup coil 26. The pulse detector 2 detects pulses G1, G2, and G3 having the same polarity corresponding to the reluctors 22a, 22b, and 22c, respectively.

  In the present embodiment, as shown in FIG. 4, the pulse detection unit 2 includes a positive pulse G1 corresponding to the front end of the reluctator 22a, a positive pulse G2 corresponding to the front end of the reluctor 22b, and the reductor 22c. A positive pulse G3 corresponding to the front end is detected. Note that the pulse detection unit 2 may be configured to detect a negative pulse corresponding to the rear end of each of the reluctors 22a, 22b, and 22c.

  The control unit 3 performs ignition control of the internal combustion engine based on the pulses G1 to G3 detected by the pulse detection unit 2. More specifically, the control unit 3 performs ignition control by turning on or off the transistor TR1 based on the pulses G1 to G3. Note that the control unit 3 is configured by, for example, a microprocessor.

  The internal power supply circuit 4 adjusts the input DC voltage to the operating voltage of the control unit 3 and outputs it.

  Next, the configuration of the control unit 3 will be described in detail.

  As illustrated in FIG. 3, the control unit 3 includes a pulse interval calculation unit 31 and a determination unit 32.

  The pulse interval calculation unit 31 calculates the time between the pulses G1, G2, and G3 detected by the pulse detection unit 2. More specifically, the pulse interval calculation unit 31 calculates the time T1 (first time) between the pulse G1 and the pulse G2 when the pulse G2 is detected, and the pulse G2 and the pulse when the pulse G3 is detected. A time T2 (second time) between G3 and G3 is calculated, and when a pulse G1 is detected, a time T3 (third time) between the pulses G3 and G1 is calculated. . In the present embodiment, since the pulse detection unit 2 is configured to detect a positive pulse corresponding to the front end of each reluctator, the pulse interval calculation unit 31 includes a detection point A as shown in FIG. Calculate the time between -A.

The determination unit 32 determines that the internal combustion engine is normal when the time T1, the time T2, and the time T3 calculated by the pulse interval calculation unit 31 satisfy a magnitude relationship based on the installation positions of the retractors 22a, 22b, and 22c. When the magnitude relationship is not satisfied, it is determined that the internal combustion engine is abnormal. In the present embodiment, as described above, there is a relationship of L1 <L2 <L3 between the circumferential intervals L1, L2, and L3. For this reason, the magnitude relationship used by the determination part 32 becomes a relationship of following formula (1).
T1 <T2 <T3 (1)

  The determination unit 32 determines whether the time T1, the time T2, and the time T3 satisfy the magnitude relationship each time the pulse G1, the pulse G2, or the pulse G3 is detected by the pulse detection unit 31. Thereby, the abnormality of the internal combustion engine can be quickly grasped.

  In addition, the magnitude relationship which the determination part 32 uses is not restricted to Formula (1). For example, when the relationship between the circumferential intervals L1, L2, and L3 of the relaxor is L2 <L1 <L3, the magnitude relationship used in the determination unit 32 is T2 <T1 <T3. In this way, the magnitude relationship used in the determination unit 32 is determined according to the magnitude relationship between the circumferential distances L1, L2, and L3 of the relaxors.

  In the control method of the ignition device 1 according to the present embodiment, when the pulse interval calculation unit 31 detects the pulse G2, the time T1 is calculated, and when the pulse G3 is detected, the time T2 is calculated and the pulse G1 is detected. In this case, when the time T3 is calculated and the determination unit 32 satisfies the magnitude relationship based on the installation positions of the retractors 22a, 22b, and 22c, the time T1, the time T2, and the time T3 calculated in the previous step are satisfied. And determining that the internal combustion engine is abnormal when the magnitude relationship is not satisfied.

  As described above, in this embodiment, it is determined whether the internal combustion engine is normal by directly comparing the time T1, T2, T3 between the pulses calculated by the pulse interval calculation unit 31. For this reason, it is not necessary to use different determination condition formulas depending on the arithmetic processing such as multiplying the time between pulses by a predetermined number as in the prior art or the rotational speed of the internal combustion engine. Therefore, according to the present embodiment, it is possible to determine whether or not the internal combustion engine is normal with a smaller number of calculations than in the past. As a result, an inexpensive microprocessor can be used as the control unit 3, and the cost of the ignition device can be reduced.

  Note that if the determination unit 32 determines that the internal combustion engine is abnormal, the control unit 3 may not ignite the internal combustion engine. That is, the control unit 3 may not output the ignition signal (off signal) to the transistor TR1 when the determination unit 32 determines that the internal combustion engine is abnormal. Thereby, an internal combustion engine can be stopped quickly at the time of abnormality.

  Preferably, in the AC generator 21, the circumferential interval L2 is not less than 3 times the circumferential interval L1, and the circumferential interval L3 is not less than 3 times the circumferential interval L2. Thereby, even when the rotational speed fluctuation of the internal combustion engine occurs, the magnitude relationship between the times T1, T2, and T3 between the pulses is maintained, so that the determination unit 32 can correctly determine the state of the internal combustion engine. More preferably, the circumferential interval L2 is four times or more of the circumferential interval L1, and the circumferential interval L3 is four times or more of the circumferential interval L2. Thereby, the determination part 32 can determine the state of an internal combustion engine more correctly.

  Here, the ignition control process by the control unit 3 will be described.

  The control unit 3 assigns processing related to ignition control as follows between the pulses (that is, between the pulses G1 and G2, between the pulses G2 and G3, and between the pulses G3 and G1). That is, the controller 3 detects the time from when the pulse G1 is detected to the current detection (ie, between the pulses G1 and G2) after the pulse G1 is detected (that is, between the pulses G1 and G2). Based on the rotation period of the rotor 22, the first rotation speed (r / min) of the internal combustion engine is calculated. Specifically, the control unit 3 calculates 1 / T × 60 (T: rotation period of the rotor 22) (r / min) to obtain the first rotation number. The control unit 3 calculates the ignition timing of the internal combustion engine based on the first rotational speed from when the pulse G2 is detected until the pulse G3 is detected (that is, between the pulses G2 and G3). Specifically, the control unit 3 adjusts the timing of how much ignition is advanced from the fixed ignition position (the position of the pulse G3). The controller 3 detects the time from the last detection of the pulse G3 to the current detection (that is, the rotor) between the detection of the pulse G3 and the detection of the pulse G1 (that is, between the pulses G3 and G1). 22), a second rotation speed (r / min) of the internal combustion engine is calculated, and the energization timing is calculated based on the second rotation speed.

  As described above, by dividing and allocating the processing related to ignition control at the time between each pulse, the control unit 3 does not need to perform multitask processing, and a cheaper microprocessor can be used as the control unit 3. it can.

  Based on the above description, those skilled in the art may be able to conceive additional effects and various modifications of the present invention, but the aspects of the present invention are not limited to the individual embodiments described above. . You may combine suitably the component covering different embodiment. Various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

1 Ignition Device 2 Pulse Detection Unit 3 Control Unit (CPU)
4 Internal power supply circuit 21 Alternator (ACG)
22 rotor 22a, 22b, 22c reluctator 23 power supply 24 battery 25 switch 26 pickup coil 27 ignition coil 27a primary coil 27b secondary coil 28 spark plug 31 pulse interval calculation unit 32 determination unit A, B detection point C1 capacitor D1 Diode Ea (Reluctant) Front End Eb (Reluctant) Rear End G1, G2, G3 Pulses L1, L2, L3 Circumferentially Interval TR1 Transistor

Claims (10)

An ignition device for igniting an internal combustion engine,
The same corresponding to each of the first, second, and third relaxors provided at irregular intervals along the circumferential direction on the outer periphery of the rotor of the AC generator driven by the internal combustion engine to generate electric power A pulse detector for detecting a first pulse, a second pulse and a third pulse of polarity;
A control unit that performs ignition control of the internal combustion engine based on the first to third pulses detected by the pulse detection unit,
The controller is
When the second pulse is detected, a first time between the first pulse and the second pulse is calculated, and when the third pulse is detected, the second pulse and the second pulse are calculated. A pulse interval for calculating a second time between the third pulse and calculating a third time between the third pulse and the first pulse when the first pulse is detected. A calculation unit;
The internal combustion engine when the first time, the second time, and the third time calculated by the pulse interval calculation unit satisfy a magnitude relationship based on the installation positions of the first to third reluctors And a determination unit that determines that the internal combustion engine is abnormal when it is determined that the engine is normal and does not satisfy the magnitude relationship. The ignition device according to claim 1, wherein the magnitude relationship is a relationship of Expression (1).
T1 <T2 <T3 (1)
Here, T1 is the first time, T2 is the second time, and T3 is the third time.   3. The ignition device according to claim 1, wherein, when the determination unit determines that the internal combustion engine is abnormal, the control unit does not ignite the internal combustion engine. 4.   The determination unit performs the first time, the second time, and the third time each time the pulse detection unit detects the first pulse, the second pulse, or the third pulse. The ignition device according to any one of claims 1 to 3, wherein it is determined whether time satisfies the magnitude relationship. The controller is
The first rotation of the internal combustion engine based on the time from the first detection of the first pulse to the detection of the current time until the detection of the second pulse after the detection of the first pulse. Calculate the number,
From the detection of the second pulse to the detection of the third pulse, the ignition timing of the internal combustion engine is calculated based on the first rotational speed,
The second rotation of the internal combustion engine based on the time from when the third pulse is detected until the first pulse is detected until the first pulse is detected after the third pulse is detected. The ignition device according to any one of claims 1 to 4, wherein the ignition timing is calculated based on the second rotation speed. Same polarity corresponding to the first, second, and third relucters provided at irregular intervals along the circumferential direction on the outer periphery of the rotor of the alternator driven by the internal combustion engine to generate electric power A pulse detection unit for detecting the first pulse, the second pulse, and the third pulse, and ignition control of the internal combustion engine based on the first to third pulses detected by the pulse detection unit A control method of an ignition device comprising a control unit,
When the second pulse is detected, a first time between the first pulse and the second pulse is calculated, and when the third pulse is detected, the second pulse and the second pulse are calculated. Calculating a second time between the third pulse and, if the first pulse is detected, calculating a third time between the third pulse and the first pulse; ,
It is determined that the internal combustion engine is normal when the calculated first time, the second time, and the third time satisfy a magnitude relationship based on the installation positions of the first to third relaxors. And determining that the internal combustion engine is abnormal when the magnitude relationship is not satisfied,
An ignition device control method comprising: An alternating current that has a rotor and first and second, and third, non-uniformly spaced circumferentially arranged outer circumferences of the rotor and that is driven by an internal combustion engine to generate electric power A generator,
An internal combustion engine drive system comprising: an ignition device for igniting the internal combustion engine;
The ignition device is
A pulse detector for detecting the first to third pulses of the same polarity corresponding to the first to third reluctors,
A control unit that performs ignition control of the internal combustion engine based on the first to third pulses detected by the pulse detection unit,
The controller is
When the second pulse is detected, a first time between the first pulse and the second pulse is calculated, and when the third pulse is detected, the second pulse and the second pulse are calculated. A pulse interval for calculating a second time between the third pulse and calculating a third time between the third pulse and the first pulse when the first pulse is detected. A calculation unit;
The internal combustion engine when the first time, the second time, and the third time calculated by the pulse interval calculation unit satisfy a magnitude relationship based on the installation positions of the first to third reluctors An internal combustion engine drive system comprising: a determination unit that determines that the internal combustion engine is abnormal when it is determined that the engine is normal and does not satisfy the magnitude relationship.   The first relaxor, the second relaxor and the third relaxor are arranged along the rotation direction of the rotor in the order of the first relaxor, the second relaxor and the third relaxor, The first circumferential interval between the first and second relaxors is smaller than the second circumferential interval between the second and third relaxors, and 8. The internal combustion engine drive system according to claim 7, wherein a circumferential interval of 2 is smaller than a third circumferential interval between the third relaxor and the first relaxor.   The second circumferential interval is at least three times the first circumferential interval, and the third circumferential interval is at least three times the second circumferential interval. The internal combustion engine drive system according to claim 8.   10. The ratio between the first circumferential interval, the second circumferential interval, and the third circumferential interval is 1: 4: 19. The internal combustion engine drive system described.

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