JPS6314293B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a starting system inspection device for an internal combustion engine, etc., and in particular, a starting system for an internal combustion engine, etc. suitable for inspecting the starting system of an internal combustion engine mounted on a vehicle for abnormalities. Regarding inspection equipment. [Prior Art] A starting system for an internal combustion engine, etc. generally consists of an on-board storage battery and a starting motor.The storage battery and the starting motor are connected by a current line having a large current capacity, and when starting, the starting system from the storage battery is connected. The starting motor is driven to rotate by passing current through the current line to the starting motor. As the starting motor rotates, a crankshaft of the internal combustion engine connected to the rotating shaft is rotated, and at the same time, an ignition device such as a distributor, which is linked to the crankshaft of the internal combustion engine, operates; The internal combustion engine is started. The starting current for rotating the starting motor is roughly divided into a starting current for starting the start, and a cranking current for maintaining the rotation of the starting motor, and generally varies depending on the model of the internal combustion engine, etc. Although there are some differences, the starting current has a current value of several hundred A, and the cranking current has a current value of around 100 A. Therefore, since a current circuit with an extremely large current is formed in the starting system, circuit resistance may increase or , the contact resistance of a switch etc. built into the starting motor becomes a large electrical resistance against the starting current, and if this electrical resistance is large, the electricity is transferred from the storage battery to the starting motor, which is necessary to rotate the starting motor. In some cases, a sufficient starting current may not be able to flow, making it impossible to rotate the starting motor. Naturally, therefore, it becomes impossible to start the internal combustion engine. Further, the load on the starting motor is mainly caused by the internal combustion engine connected thereto, and the load factors include the volume, compression ratio, and frictional force of the mechanical parts of the internal combustion engine. Therefore, if the load on these starting motors is large, even if sufficient starting current is applied to the starting motors, the rotational speed of the starting motors will drop, making it impossible to start the internal combustion engine. . In other words, in order to start an internal combustion engine, it is not enough for the crankshaft to be rotated by the starter motor; if the crankshaft is not rotated above a certain rotational speed, a sufficient compression ratio in the cylinder of the internal combustion engine cannot be obtained. First, the compressed gas mixture in the cylinder cannot be ignited by the ignition device, making it impossible to start the internal combustion engine. In a normal 4-cycle gasoline engine, the number of revolutions required to start the engine is generally 200.
~300r, P, m. From the above, in order for the starting system of an internal combustion engine, etc., to start the engine, it is necessary that the starting current flowing through the starting motor of the starting system and the rotation speed of the starting motor be normal; If there is an abnormality, it will cause the engine to be unable to start. Conventionally, there is no particular measuring device that can be used to test these starting systems, but in general, a part of the current circuit of the starting system (for example, an electrode terminal of a storage battery) is removed and a shunt is introduced into the current circuit. An operator connects a device to the starter, uses an ammeter or the like to read the magnitude of the starting current flowing from the storage battery to the starting motor, and checks whether there is an abnormality in the starting system based on the magnitude. Alternatively, without removing the current circuit,
The starting current is measured using a clamp-type ammeter that uses a magnetoelectric transducer such as a Hall element that can measure the current flowing through the current circuit simply by clamping it to the current line, and the operator can determine the magnitude of the starting current. The engine was then inspected to see if there was any abnormality in the starting system. [Problems to be Solved by the Invention] However, in all conventional methods, the presence or absence of an abnormality in the starting system is inspected based on the magnitude of the starting current for rotating the starting motor. For example, even if the starting current is determined to be normal, if the load on the starting motor is large and the rotational speed of the starting motor decreases, it may become impossible to start the internal combustion engine. Furthermore, the function of the starting system is more effective as the starting current is lower and the starting motor rotation speed is higher, but as mentioned above, the electric resistance of the current circuit that flows a large current from the on-board storage battery to the starting motor is large. Alternatively, if the capacity of the on-vehicle storage battery is insufficient or the battery is insufficiently charged, the starting current will decrease, and the rotational speed of the starting motor will further decrease, resulting in the inability to start the internal combustion engine. Therefore, since it is not possible to determine the reason why the internal combustion engine cannot be started from the magnitude of the starting current alone, it is not necessarily sufficient to check for abnormalities in the starting system based solely on the magnitude of the starting current, as in the conventional method. Nakatsuta. Additionally, the magnitude of the starting current generally varies greatly depending on the capacity of the on-board storage battery, the state of the internal combustion engine, and the like. For example, when an internal combustion engine is cold, the viscosity of the lubricating oil in the internal combustion engine's cylinders increases, and the frictional force increases significantly. Requires starting current. However, in reality, conventional inspection methods hardly take into account such differences in external conditions. An object of the present invention is to provide an inspection device that can determine whether there is an abnormality in a starting system of an internal combustion engine or the like. Another object of the present invention is to provide an inspection device that can comprehensively determine whether or not there is an abnormality in the starting system of an internal combustion engine or the like and the location of the abnormality. [Means for solving the problem and its operation] The starting system inspection device for an internal combustion engine, etc. according to the first invention detects the presence or absence of an abnormality in the starting system from the starting current after completion of warm-up. A starting system inspection device includes an external power source connected in parallel to an onboard storage battery, a current detecting means for detecting a starting current flowing to the starting motor at the time of starting, and a maximum value of a starting current signal output from the current detecting means. , a peak hold circuit that outputs a starting current signal, and a starting current lower limit signal that corresponds to the circuit resistance of the starting system during normal operation, which is set in advance, and the starting resistance of the starting motor. and a determination circuit that compares the starting current with the upper limit value signal of the starting current, and determines whether there is an abnormality in the starting system based on the comparison result. According to the above configuration, the starting motor is driven by the external power source from a stopped state after completion of warm-up, and the starting current of the starting motor at this time is detected. The maximum value of this starting current is held in a peak hold circuit, and the starting current signal output from the circuit is compared with the starting current upper limit value signal corresponding to the mechanical resistance of the starting system during normal operation. When the starting current signal is larger than the upper limit value signal, it is determined that the mechanical starting resistance of the starting motor is large, and on the other hand, when the starting current signal is smaller than the lower limit value signal, it is determined that the electrical circuit resistance of the starting system is large. It is judged to be large. The starting system inspection device for an internal combustion engine, etc. according to the second invention detects the presence or absence of an abnormality in the starting system from the starting current, cranking current, and cranking rotation speed after completion of warm-up. The device includes an external power supply connected in parallel to the on-board storage battery, a current detection means for detecting the starting current flowing to the starting motor at the time of starting, and a maximum value of the starting current signal output from the current detection means, and the starting current signal is maintained. a peak hold circuit that outputs the current signal as a current signal; an averaging circuit that averages the starting current signal output from the current detecting means and outputs it as a cranking current signal; A conversion circuit that detects and outputs a cranking rotation speed signal, a starting current signal output from the peak hold circuit, a cranking current signal output from the averaging circuit, and a cranking rotation speed output from the conversion circuit. The apparatus is equipped with a determination circuit that compares each signal with a preset reference value signal and determines an abnormality in the starting system based on the comparison result. According to the above configuration, the starting motor is driven by the external power source from a stopped state after completion of warm-up, and the starting current of the starting motor at this time is detected. The maximum value of this starting current (starting current signal) and a preset reference value, that is, the starting current upper limit value signal corresponding to the electrical and mechanical resistance of the starting system during normal operation, and the starting motor machine In addition to comparing the lower limit value of starting current corresponding to the starting resistance,
The cranking current signal output from the averaging circuit and the cranking rotation speed signal output from the conversion circuit are set to a preset reference value, that is, the averaged starting current during normal cranking drive ( cranking current) upper limit signal,
and the cranking rotation speed lower limit signal. Then, the starting current, the cranking current, and the cranking rotational speed are checked against the criteria shown in Table 1 to determine whether there is an abnormality in the starting system and the location of the abnormality. [Examples] Examples of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a starting system of an internal combustion engine and a block diagram of an inspection device connected to the starting system, which is a first embodiment of the starting system inspection device according to the present invention. A specific example of an electric circuit based on the above is shown in FIG. 3, showing the signal waveforms of each part. As shown in FIG. 1, the starting system generally includes an onboard storage battery BA, a relay switch MS, a drive coil SC that drives the relay switch MS, a starting motor SM, and a connection between the storage battery BA and the relay switch.
It consists of an MS to starting motor SM system current line (hereinafter referred to as booster cable) BC.
The operation of the starting system is such that when the key switch SW is operated, current flows from the mounted storage battery BA to the drive coil SC, the contacts of the relay switch MS are closed, and the current flows from the mounted storage battery BA to the booster cable BC and the relay switch MS. A large current of several hundred A flows through the starting motor SM, and the starting motor SM is driven to rotate. On the other hand, the inspection device according to the present invention also has a first
As shown in the figure, a current detection means 1 and a gate circuit 2
, timing circuit 3, and peak hold circuit 4
, a signal display section 5 , a determination circuit 6 , a determination result display section 7 , and an external power source 8 . The current detection means 1 is a clamp-type ammeter that applies a generally well-known magneto-electric conversion element such as a Hall element, and as shown in FIG. It is composed of a current detection section 1a that is clamped and mounted, and a measurement circuit section 1b that measures the signal output from the current detection section 1a as a current signal, and detects the direct current component of the current flowing through the booster cable BC. and alternating current components can be detected without contact by simply clamping the booster cable BC. This current detection means 1 has the configuration of a clamp-type ammeter that is already commercially available, and the structure of the current detection section 1a also has a clamp section, and a Hall element or the like is installed in the magnetic core of the clamp section. It is not shown because it is a built-in general structure. A starting current signal as shown in FIG. 3a detected by this current detection means 1 from a part of the booster cable BC of the starting system when the starting system is driven is as follows:
It is output to the gate circuit 2 and timing circuit 3 at the next stage. The gate circuit 2, as shown in FIG. 2, is composed of a switch element 2a such as an FET,
The output terminal of the current detection means 1 is connected to the input terminal of the switch element 2a, the output terminal of the switch element 2a is connected to the input terminal of the next-stage peak hold circuit 4, and the gate terminal of the switch element 2a teeth,
They are each connected to the timing circuit 3. This gate circuit 2 is connected to the starting current signal during a period when a gate signal as shown in FIG. 3b, which is an output signal of the timing circuit 3 which operates at the rising edge of the starting current signal shown in FIG. The signal is passed through and output to the next stage peak hold circuit 4. As shown in FIG. 2, the timing circuit 3 includes a comparator section including resistors 3a, 3b, 3d and an operational amplifier (hereinafter referred to as an operational amplifier) 3c, and an inverting circuit section including resistors 3e, 3f and a transistor 3g. configured. The output end of the current detection signal 1 is connected to the input end of the timing circuit 3, that is, the input end of the resistor 3a. The starting current signal output from the current detecting means 1 is input to this input terminal, and its level is determined by the resistor 3.
When the set voltage e input from b becomes larger than ₀ ,
The comparator section outputs an output "1" and outputs it to the gate terminal of the switch element 2a of the gate circuit 2 as a gate signal (FIG. 3b). Further, the output "1" of the comparator section is inverted in the inverting rotation section, and the inverting circuit section outputs an output "0" to the reset terminal of the peak hold circuit 4. The peak hold circuit 4 includes resistors 4a, 4e, 4g, and a diode 4, as shown in FIG.
b, 4d, capacitor 4f, operational amplifier 4c, 4
h and a switch element 4i such as an FET. This peak hold circuit 4 holds the maximum value of the starting current signal (FIG. 3a) passing through the gate circuit 2, that is, the starting current, and generates a DC starting current signal Ip as shown in FIG. 3c. and output to the next stage signal display section 5. The signal display section 5, as shown in FIG. 2, is composed of a resistor 5a and an analog meter 5b, and directly displays the starting current output from the peak hold circuit 4. The determination circuit 6, as shown in FIG.
Resistors 6a, 6b, diode 6c, operational amplifier 6
d, and resistors 6e, 6
The second comparator circuit section includes a diode 6g, a diode 6g, and an operational amplifier 6h, and an inverting circuit section includes resistors 6i, 6j, and a transistor 6k. This first comparison circuit section has a first reference level that can be set freely.
_e1 is compared with the starting current signal Ip output from the peak hold circuit 4, and when the starting current signal Ip becomes lower than the reference level _e1 , the output becomes "1".
Output. This corresponds to a case where the circuit resistance of the starting system is large and the starting current is reduced to such an extent that the starting motor SM cannot be driven. On the other hand, a second comparison circuit section compares a freely settable second reference level _e2 and the starting current signal Ip,
When the starting current signal Ip becomes higher than the reference level _e2 , an output of "0" is output, which is converted to "1" by the next stage inverting circuit section. This is the starting motor
This corresponds to a case where the SM itself is very heavy and requires an extremely large starting current. As shown in FIG. 2, the determination result display section 7 includes a first display section consisting of resistors 7a and 7b, a transistor 7c, and a light emitting diode 7d, and a resistor 7.
e, 7f, transistor 7g, light emitting diode 7
and a second display section consisting of h.
This first display section is operated by the output of the first comparison circuit section of the comparison circuit 6, and as described above,
When the starting current signal Ip is lower than the reference level _e1 , the light emitting diode 4d is turned on. Also, the second
The display section is operated by the output of the second comparator circuit section of the comparator circuit 6, and as described above, when the starting current signal Ip is greater than the reference level _e2 , the light emitting diode 7h is turned on. The external power source 8 is composed of a storage battery 8a which has a voltage level equivalent to that of the on-board storage battery BA and has a sufficient capacity to drive the starting motor SM, and is connected to the on-board storage battery BA by cables 8b and 8c with large current capacity. connected in parallel to Therefore, even if the on-board storage battery BA has insufficient capacity or has completely lost its capacity, the external power supply 8 can start the starting motor.
The SM can be rotated sufficiently to prevent erroneous judgment results. Inspection of the starting system using the above-mentioned inspection device is carried out after warm-up in order to minimize the influence of the frictional force of lubricating oil of the internal combustion engine and to keep the load constant regardless of the type of internal combustion engine. Next, the operation of the embodiment of the first invention will be explained. After warming up, if there is no output signal from the current detection means 1, the comparator of the timing circuit 3 outputs "0", the output "0" sets the gate circuit 2 to a non-conducting state, and The output "0" is inverted by the inverting circuit section, and the output "1" makes the switch element 4i in the peak hold circuit 4 conductive, so that the output of the peak hold circuit 4 is "0". When the starting motor is driven and the starting current is detected by the current detecting means 1, the comparator of the timing circuit 3 outputs "1".
Therefore, the output "1" makes the gate circuit 2 conductive, and at the same time the starting current signal (Fig. 3a) is input to the peak hold circuit 4, the comparator output "1" is inverted by the inverting circuit section. The output "0" is input to the switch element 4i in the peak hold circuit 4, and sets the switch element 4i to a non-conducting state. Therefore, the peak hold circuit 4 holds the starting current signal Ip indicating the maximum value in the starting current signal (FIG. 3a), and the analog meter 5b of the next stage signal display section 5 indicates that the starting device is displayed as the starting current value. Further, the starting current signal Ip outputted from the peak hold circuit 4 is input to a judgment circuit 6, and its upper and lower limits are compared and judged with respective freely settable reference levels, and the comparison and judgment results are displayed respectively. 7. According to the starting system inspection device described above,
When the internal combustion engine is warmed up, the starting current value is determined from the starting current that flows through the starting motor SM when the starting system is driven, and its magnitude is compared with a preset comparison level. An extremely simple device can be used to accurately and accurately detect abnormalities in circuit resistance, frictional force of the starting motor SM itself, etc.
It can be tested quickly. Next, an embodiment of the starting system inspection device according to the second invention will be described. Fig. 4 shows a block diagram of the starting system of the internal combustion engine and the inspection device of the embodiment connected to the starting system, Fig. 5 shows a specific example of an electric circuit based on Fig. 4, and Fig. 6 The waveforms of each part of the signal are shown in FIG. In the drawings, parts having the same configuration, function, and effect as those of the inspection device are designated by the same symbols, and detailed explanations will be omitted. The starting system inspection device according to this embodiment has a fourth
As shown in the figure, the testing device according to the embodiment of the first invention includes an averaging circuit 9 that averages the starting current signal output from the current detection means 1 and outputs it as a cranking current signal; a signal display unit 10 that displays the output of the averaging circuit 9 as it is; a determination circuit 11 that compares the output of the averaging circuit 9 with a preset reference value and outputs a determination result;
1, and an AC coupling for converting the period of the AC component of the starting current signal output from the current detection means 1 into a DC signal and outputting it as a cranking rotation speed signal. A frequency-voltage conversion circuit consisting of a circuit 13, a Schmitt circuit 14, a mono-multi circuit 15, and a filter circuit 16; a signal display unit 17 that directly displays an analog signal output from the frequency-voltage conversion circuit; A determination circuit 18 that compares the output with a preset reference value and outputs a determination result.
, a determination result display unit 19 that immediately displays the determination result of the output of the determination circuit 18, and the determination circuits 6 and 1.
A comprehensive judgment circuit 20 performs a comprehensive judgment of failure of the starting system based on each judgment result of 1 and 18, and displays whether or not there is an abnormality in the starting system of the internal combustion engine and the location of the abnormality according to the output of the comprehensive judgment circuit 20. This is a configuration in which a comprehensive judgment result display section 21 is added. Here, the cranking current refers to the current flowing from the storage battery to the starting motor during the period when the internal combustion engine is maintained in rotation by the starting motor.
When the internal combustion engine is ignited and started, this cranking current does not flow. Further, the cranking rotation speed refers to the rotation speed of the internal combustion engine during the period in which the cranking current is flowing. As shown in FIG. 5, the averaging circuit 9 is composed of a filter circuit including resistors 9a, 9b, capacitors 9c, 9d, and an operational amplifier 9e.
This averaging circuit detects the starting current signal (see Fig. 6a, Fig. 3a) detected by the current detecting means 1 while the engine is being cranked by the starting system. (same as the latter half) is averaged and used as the cranking current signal Ic. In other words, when the internal combustion engine is being cranked, the cranking current signal Ic is an alternating current signal that changes depending on the cylinder as the compression stroke of the internal combustion engine is repeated. The output of this averaging circuit 9, which averages the alternating current components, is outputted to a signal display section 10 and a determination circuit 11, respectively. Note that the starting current Ip immediately after starting the starting system is also input to this averaging circuit 9, but by continuing the cranking drive of the starting system,
There is no problem because the starting current signal becomes a stable cranking current signal Ic a few seconds after starting. As shown in FIG. 5, the signal display section 10 is composed of a resistor 10a and an analog meter 10b, and the cranking current value Ic of the starting system output from the averaging circuit 9 is immediately displayed on the analog meter 10b. As also shown in FIG.
1e, 11f, and an inverting circuit section consisting of a transistor 11g. This determination circuit 11 is
A freely settable reference level _e3 is compared with the cranking current signal Ic output from the averaging circuit 9, and if the cranking current signal Ic is greater than the reference level _e3 , an output of "1" is output. This corresponds to a case where there is an abnormality in the starting motor SM itself during cranking drive, and the rotational frictional force of the starting motor SM is abnormally large, requiring a large cranking current. The output of this comparison circuit 11 is output to the determination result display section 12 and the comprehensive determination circuit 20. As shown in FIG.
c. The light emitting diode 12d is lighted when the determination circuit 11 outputs "1", that is, when the cranking current is abnormally large. The AC coupling circuit 13, as shown in FIG. The DC component of the cranking current (same as the latter half of part a) is removed, and only the AC component of the cranking current (FIG. 6d), which changes for each cylinder in response to the cranking rotation of the internal combustion engine, is output to the next-stage Schmitt circuit 14. . The Schmitt circuit 14, as shown in FIG. 5, is composed of resistors 14a, 14b, 14d and an operational amplifier 14c, and is configured to control the AC component of the cranking current signal output from the AC coupling circuit 13 (FIG. 6d).
is converted into a rectangular wave (FIG. 6e), and the rectangular wave signal is output to the next-stage monomulti circuit 15. As shown in FIG. 5, the monomulti circuit 15 is composed of an integrated circuit (hereinafter referred to as IC) 15a having a monostable multivibrator function, a capacitor 15b, and a resistor 15c, and receives the rectangular wave signal output from the Schmitt circuit 14. (FIG. 6e) is converted into a pulse signal with a constant time width t determined by the time constant of the capacitor 15b and the resistor 15c, and output to the next-stage filter circuit 16. The filter circuit 16 includes resistors 16a, 16b and a capacitor 16, as shown in FIG.
c, 16d, and an operational amplifier 16e, which converts the pulse signal output from the monomulti circuit 15 (FIG. 6 f) into a DC voltage signal Vr (FIG. 6 g) proportional to the period of the pulse signal. . The DC voltage signal Vr output from the filter circuit 16 is output to the next stage signal display section 17 and the determination circuit 18. Here, the AC coupling circuit 13, the Schmitt circuit 14, the mono-multi circuit 15, and the filter circuit 16 constitute a conversion circuit that converts the cycle of the AC component of the starting current signal into a DC signal to obtain a cranking rotation speed signal. The signal display section 17, as shown in FIG.
Vr is expressed as the cranking rotational speed of the internal combustion engine rotationally driven by the starting system. As shown in FIG. 5, the judgment circuit 18 is composed of resistors 18a, 18b, a diode 18c, and an operational amplifier 18d, and compares the DC voltage signal Vr output from the filter circuit 16 with a freely settable reference level _e4 . However, when the DC voltage signal Vr is smaller than the reference level _e4 , that is, when the cranking rotation speed is low, an output of "1" is output. The output of this judgment circuit 18 is output to a judgment result display section 19 and a comprehensive judgment circuit 20. As shown in FIG.
c. The light emitting diode 19d is lighted when the output of the determination circuit 18 is "1", that is, when the cranking rotation speed is lower than the reference level. The comprehensive judgment circuit 20 includes an output of a judgment circuit 6 similar to the inspection apparatus according to the embodiment of the first invention, an output of a judgment circuit 11 that operates according to the cranking current, and a judgment that operates according to the cranking rotation speed. Based on the output of the circuit 18, the presence or absence of an abnormality in the starting system of the internal combustion engine and the location of the abnormality are determined as shown in Table 1 below.

〔Effect of the invention〕

As described above, according to the first invention, the starting motor is driven by an external power supply from a stopped state after warming up, and the starting system is determined based on the magnitude of the starting current at this time. The presence or absence of an abnormality in the starting system can be accurately and quickly inspected without being affected by the capacity of the storage battery or the frictional force of lubricating oil or the like. Further, according to the second invention, the starting motor is driven by an external power supply from a stopped state after warming up, and the starting system is controlled based on the magnitude of the starting current, cranking current, and cranking rotation speed at this time. Since a comprehensive determination is made, in addition to the results of the first invention, abnormalities in the starting system can be accurately and quickly inspected.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a starting system of an internal combustion engine to which an embodiment of the first invention of the starting system inspection device for an internal combustion engine, etc. according to the present invention is connected, and FIG. FIG. 3 is a circuit diagram showing a specific example of the electric circuit of the inspection device of the example, FIG. 3 is a diagram showing signal waveforms of each part of the embodiment of the first invention, and FIG. FIG. 5 is a block diagram showing a starting system of an internal combustion engine to which the embodiment of the starting system inspection device according to the second invention is connected, and FIG. 5 shows a specific example of the electric circuit of the inspection device according to the embodiment of the second invention. The circuit diagram, FIG. 6, is a diagram showing signal waveforms at various parts of the embodiment of the second invention. ,...Inspection equipment, BA...Onboard storage battery,
SM...Starting motor, BC...Current line, 1...
Current detection means, 2... Gate circuit, 3... Timing circuit, 4... Peak hold circuit, 5, 1
0, 17... Signal display section, 6, 11, 18... Judgment circuit, 7, 12, 19... Judgment result display section, 8
... External power supply, 9 ... Averaging circuit, 13 ... AC coupling circuit, 14 ... Schmitt circuit, 15 ... Monomulti circuit, 16 ... Filter circuit, 20 ...
...Comprehensive judgment circuit, 21...Comprehensive judgment result display section.

Claims (1)

[Scope of Claims] 1. In a starting system inspection device for an internal combustion engine, etc., which detects the presence or absence of an abnormality in the starting system based on the starting current after the completion of warm-up, an external power source connected in parallel to a tower-mounted storage battery and a A current detecting means for detecting the starting current flowing through the starting motor; a peak hold circuit for holding the maximum value of the starting current signal output from the current detecting means and outputting it as a starting current signal; The lower limit value signal of the starting current corresponding to the electrical resistance of the starting system during normal operation, which has been previously set, and the upper limit value signal of the starting current corresponding to the mechanical starting resistance of the starting motor are respectively compared, and the comparison results are obtained. 1. A starting system inspection device for an internal combustion engine, etc., comprising: a determination circuit for determining an abnormality in a starting system. 2. In a starting system inspection device for internal combustion engines, etc. that detects the presence or absence of abnormalities in the starting system from the starting current, cranking current, and cranking rotation speed after warm-up, an external power source connected in parallel to the onboard storage battery and a starting system are used. a peak hold circuit that holds the maximum value of the starting current signal output from the current detecting means and outputs it as a starting current signal; and an output of the current detecting means. an averaging circuit that averages the starting current signal of and outputs it as a cranking current signal; a converting circuit that detects the period of the alternating current component of the starting current signal output from the current detection means and outputs it as a cranking rotation speed signal; The starting current signal outputted from the peak hold circuit, the cranking current signal outputted from the averaging circuit, and the cranking rotation speed signal outputted from the conversion circuit are each compared with a preset reference value signal. 1. A starting system inspection device for an internal combustion engine, etc., comprising: a determination circuit that determines an abnormality in the starting system based on the comparison result. 3. The starting system inspection device for an internal combustion engine or the like according to claim 2, wherein the conversion circuit is constituted by a frequency-voltage conversion circuit that converts the period of the alternating current component of the starting current signal into a direct current signal.