JP5472368B2 - Starter control system - Google Patents

Description

  The present invention relates to a starter control system.

  2. Description of the Related Art Conventionally, there is known a control system having a so-called idle stop function that detects an operation for stopping or starting such as an accelerator operation or a brake operation to automatically stop and restart an engine. By this idle stop control, effects such as engine fuel consumption reduction are achieved.

  In the case of engine restart by the idle stop control, basically, the starter device is driven to perform initial rotation to the engine in the same manner as in the case of engine start by the initial start operation by the driver (for example, start key operation or start button operation). Is granted. Conventionally, as such a starter system, a starter energization circuit for energizing a starter device in response to an initial start operation by a driver, and a starter based on a control signal output from a control unit in response to an engine restart request. A system for controlling energization to a starter device by separately providing an energization circuit for restart that energizes the device and controlling on / off of switch means such as a relay provided in each energization path It has been proposed (see, for example, Patent Document 1).

JP 2010-174898 A

  By the way, in a starter system including an energization circuit for initial startup and an energization circuit for restart, a relay and a large number of switching elements for controlling the opening and closing of the relay are provided, and there are various forms of occurrence of abnormality. For example, in one of the energization circuits, a single failure may occur or a plurality of abnormalities may occur simultaneously. In addition, a plurality of abnormalities may occur simultaneously in the energization circuit for the initial start and the energization circuit for the restart. On the other hand, if an abnormality occurs in the starter energization circuit, the engine cannot be started due to the inability to energize the starter device, or the starter device continues to be energized, causing a failure of the engine or starter device. There is a risk of inviting. Therefore, when an abnormality relating to the starter energization circuit occurs, it is necessary to detect the abnormality with high accuracy. In particular, even if an abnormality has occurred in the energizing circuit for restarting, if the engine is automatically stopped without knowing the abnormality after engine startup, the engine can be restarted when the restart condition is satisfied. In addition, a road fault may occur.

  The present invention has been made in view of the above problems, and has as its main object to provide a starter control system capable of improving the accuracy of abnormality detection of a starter energization circuit.

  The present invention employs the following means in order to solve the above problems.

  The present invention automatically stops the engine when a predetermined automatic stop condition is satisfied, and restarts the engine by driving a starter device when the predetermined restart condition is satisfied after the automatic stop condition is satisfied. This is applied to a starter control system having an automatic stop / restart function. According to a first aspect of the present invention, there is provided a first switch portion that is provided in a first energization path that connects a power source and the starter device and opens and closes the first energization path, and is controlled in accordance with the establishment of the restart condition. A first opening / closing drive unit that opens and closes the first switch unit in response to a start control signal output from the unit, and a first energization circuit that energizes the starter device by closing the first switch unit; A first voltage detecting means for detecting a voltage at a detection position showing different voltage values in a state in which the first switch unit is driven to be closed and a state in which the first switch unit is opened in the energization path provided with the first opening / closing drive unit; In the energization path of the starter device, a second voltage detection unit that detects a voltage at a detection position showing different voltage values in the energized state and the non-energized state of the starter device, the first voltage detection unit, and the second An abnormality diagnosing unit that acquires a detection result with the pressure detecting unit at the same time and performs an abnormality diagnosis of the first energization circuit based on a combination of the acquired detection results at each detection position. And

  The first opening / closing drive unit of the starter energization circuit (first energization circuit) for restart includes a voltage detection unit that detects different voltage values in a state where the first switch unit is driven to be closed and a state where the first switch unit is not driven to be closed. Then, the state of the first switch section can be grasped by monitoring the detection result of the voltage detection means. That is, when the start control signal is output from the control unit, whether or not the first switch unit is actually driven to close by the first opening / closing drive unit and whether the start control signal is not output is the first switch unit. It is possible to grasp whether or not is supposed to be driven to close. However, even if the detected voltage at the first opening / closing drive unit is a normal value, there may be cases where the starter device is not actually energized correctly.

  In this regard, according to the above configuration, the voltage detection result (the detection result of the first voltage detection means) in the first opening / closing drive unit and the voltage detection result (the detection of the second voltage detection means) in accordance with the energization state of the starter device. Result) at the same time, and the presence or absence of abnormality in the first energization circuit is determined based on the combination of the detection results obtained at the respective detection positions. Can be improved.

  According to a second aspect of the present invention, there is provided a second switch unit that is provided in a second energization path that connects a power source and the starter device, and that opens and closes the second energization path, and the second switch unit according to an initial start operation by a driver. A second opening / closing drive unit that opens and closes the switch unit, a second energization circuit that energizes the starter device by closing the second switch unit, and an energization path provided with the second opening / closing drive unit, And a third voltage detecting means for detecting a voltage at a detection position showing different voltage values in a state in which the second switch portion is driven to be closed and a state in which the second switch portion is driven to be opened. The abnormality diagnosing means acquires the detection results of the first voltage detecting means, the second voltage detecting means, and the third voltage detecting means at the same time, and the detection results at the acquired detection positions are obtained. An abnormality diagnosis of the first energization circuit and the second energization circuit is performed based on the combination.

  The second opening / closing drive unit of the starter energization circuit (second energization circuit) for the initial start is provided with voltage detection means for detecting different voltage values in a state where the second switch unit is driven to be closed and a state where the second switch unit is not driven. Then, the state of the second switch unit can be grasped by monitoring the detection result of the voltage detection means. That is, during the start operation for the first start by the driver, whether or not the second switch unit is actually driven to be closed by the second opening / closing drive unit, or the start operation for the first start by the driver is not performed It is possible to grasp whether or not the second switch portion is in a closed drive state.

  However, in the starter system including the first energization circuit and the second energization circuit, there are various forms of abnormality. For example, even if the detection voltage at the first opening / closing drive unit is a normal value, the starter device is actually energized. It may also happen that is not done correctly. The same situation can occur in the second opening / closing drive unit. Therefore, there is a concern that the abnormality determination cannot be performed correctly only by separately using the voltage detection result at the first opening / closing drive unit and the voltage detection result at the second opening / closing drive unit.

  In this regard, according to the above configuration, the voltage detection result in the first opening / closing drive unit (detection result of the first voltage detection unit), the voltage detection result in the second opening / closing drive unit (detection result of the third voltage detection unit) And a voltage detection result (detection result of the second voltage detection means) in accordance with the energization state of the starter device at the same time, and based on a combination of the acquired detection results at each detection position, the first energization circuit And since the presence or absence of abnormality regarding a 2nd electricity supply circuit is determined, the precision of abnormality determination can be improved. That is, when both the first energization circuit and the second energization circuit are normal, there is one combination of detection results at each detection position by the voltage detection means, and the combination cannot be generated in the normal state. Can specify that an abnormality has occurred in at least one of the first energization circuit and the second energization circuit. Therefore, according to the method based on the combination of detection results at each detection position, it is possible to suitably perform abnormality detection related to the first energization circuit and the second energization circuit.

  Regarding the detection results at each detection position by the voltage detection means, the combination at the normal time differs between when the starter device is driven by the first energization circuit and when the starter device is driven by the second energization circuit. Even if the combination is normal when the engine is started, the combination corresponds to the combination when there is an abnormality when the engine is started by the second energization circuit.

  In view of this, in the invention according to claim 3, the abnormal combination pattern indicating which combination of detection results at the respective detection positions is an abnormal combination is the first energization circuit and the second energization circuit. A plurality of predetermined combinations are established in association with which one of the circuits is in the energized state, and which of the abnormal combination patterns depends on which of the first energization circuit and the second energization circuit is operated in the energized state. Pattern acquisition means for acquiring the above. The abnormality diagnosis unit performs an abnormality diagnosis based on the abnormality combination pattern acquired by the pattern acquisition unit. By doing so, an abnormality diagnosis can be performed in accordance with the energization states of the first energization circuit and the second energization circuit, and erroneous detection can be avoided.

  At the time of normal engine start, the starter device is not driven by energization through the first energization circuit and the second energization circuit. However, in the abnormal state, the first energization circuit and the second energization circuit are included. There may be an abnormality that can be identified when the circuit is operated in an energized state.

  In view of this point, the invention according to claim 4 is the same as the energization by the second energization circuit when the starter device is driven by energization through the second energization circuit during the initial start operation by the driver. A first forced energization means for operating the first energization circuit to an energized state at a time, and an abnormal combination pattern when the first energization circuit and the second energization circuit are operated to an energized state as the abnormal combination pattern The forced energization pattern is determined in advance, and the pattern acquisition means acquires the forced energization pattern when the first forced energization means operates the first energization circuit in an energized state. In the invention according to claim 5, when the starter device is driven by energization through the first energization circuit when the start control signal is output, at the same time as energization by the first energization circuit. A second forced energization means for operating the second energization circuit to the energized state, and the abnormal combination pattern is an abnormal combination pattern when the first energization circuit and the second energization circuit are operated to the energized state. A forced energization pattern is determined in advance, and the pattern acquisition means acquires the forced energization pattern when the second energization means operates the second energization circuit in an energized state.

The said structure WHEREIN: The fail safe means which changes the content of the fail safe process according to the diagnostic result of the said abnormality diagnosis means is provided.

  When an abnormality is detected by the abnormality diagnosing means, depending on the type of abnormality, the starter device may not be driven by either the first energization circuit or the second energization circuit, and the abnormality relates to the second energization circuit. In some cases, the starter device can be driven by energization through the first energization circuit. Therefore, when a circuit abnormality is detected, the fail-safe process can be performed in accordance with the abnormality by changing the embodiment of the fail-safe process according to the result of the abnormality diagnosis.

Specifically, as in the invention described in claim 6 , when the fail-safe means is diagnosed as having an abnormality by the abnormality diagnosing means during engine operation, the abnormality is an abnormality related to the second energization circuit. In this case, the automatic stop is permitted, and the automatic stop is prohibited in the case of an abnormality related to the first energization circuit. According to a seventh aspect of the present invention, when the fail-safe means is diagnosed as abnormal by the abnormality diagnosis means during the automatic stop, the abnormality is an abnormality related to the second energization circuit. The starter device is driven by energization through the first energization circuit, and the starter device is driven by energization through the second energization circuit in the case of an abnormality relating to the first energization circuit. By doing so, it is possible to avoid occurrence of a road fault because the engine cannot be restarted after the engine is automatically stopped.

The above invention can be preferably applied to a starter device including a pinion driving coil that moves a pinion toward a ring gear connected to an output shaft of an engine and a motor that rotates the pinion. That is, in the invention according to claim 8 , the first energization path includes a pinion energization path that connects the power source and the pinion drive coil, and a motor energization path that connects the power source and the motor, A pinion switch having a pinion switch part provided in the pinion energization path as a first switch part and a motor switch part provided in the motor energization path, and opening and closing the pinion switch part as the first opening / closing drive part An opening / closing drive part and a motor opening / closing drive part for opening / closing the motor switch part are provided, and voltage detection is performed at a predetermined detection position of an energization path provided with the pinion opening / closing drive part as the first voltage detection means. Means (M3, M4) and means (M for performing voltage detection at a predetermined detection position in the energization path provided with the motor opening / closing drive unit. , M5), and as the second voltage detection means, a system (M6) for detecting voltage through the pinion energization path and a means (M7) for performing voltage detection through the motor energization path. Apply.

  As the starter device, there is a tandem type device that can separately control the movement of the pinion and the rotation of the pinion. In the energization circuit of the tandem starter device, the switch unit and the opening / closing drive unit need to move the pinion and rotate the pinion, and the form of occurrence of abnormality becomes more complicated. Therefore, by applying the present invention to a tandem starter device, the above effects can be obtained more suitably.

The electrical block diagram which shows the whole outline | summary of a starter control system. The time chart which shows normal operation at the time of engine first start. The time chart which shows normal operation at the time of engine restart. The figure which shows the detail of the object of the abnormality detection in this abnormality diagnosis process. The figure which shows an example of circuit abnormality information. The figure which shows a drive pattern. The flowchart which shows the process sequence of an abnormality diagnosis process. The flowchart which shows the process sequence of a drive pattern selection process. The figure which shows an example of the abnormal combination pattern of other embodiment.

  Hereinafter, an embodiment in which the present invention is embodied in a vehicle equipped with an engine will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an overview of the starter control system of the present embodiment.

  In FIG. 1, an engine starter device 10 is of a pinion extrusion type, and includes a pinion (not shown), a pinion extrusion coil 11 that pushes the pinion toward a ring gear connected to the output shaft of the engine, and a motor 12 that rotates the pinion. And. In addition, the starter device 10 is provided with a motor drive relay 13 that switches between energization / non-energization of the motor 12.

  The starter device 10 is a tandem type capable of individually controlling the push-out and rotation of the pinion, and the energization to the pinion extrusion coil 11 and the motor 12 can be independently controlled by using the battery VB as a power supply source. The system also includes an initial start circuit 15 and a restart circuit 16 as a starter energization circuit for energizing the starter device 10 (pinion extrusion coil 11 and motor 12).

  The initial start circuit 15 energizes the starter device 10 in response to a start operation of an initial start operation member 14 (for example, a start key or a start button) by a driver. The initial start circuit 15 includes a second pinion energization path 17a for connecting the battery VB and the pinion extrusion coil 11 as an energization path (corresponding to the second energization path) for connecting the battery VB and the starter device 10, and A second motor energization path 17b that connects the battery VB and the motor 12 is provided.

  A contact 18a of the initial start pinion relay 18 is provided on the second pinion energization path 17a, and the second pinion energization path 17a is opened and closed by switching the opening and closing of the contact 18a. The relay coil 18b of the initial start pinion relay 18 is connected to the battery VB, and the initial start operation member 14 is provided on the energization path connecting the relay coil 18b and the battery VB. The initial start operation member 14 includes a starter switch SW1. When the starter switch SW1 is turned on by the start operation of the initial start operation member 14 by the driver, the relay coil 18b of the initial start pinion relay 18 is energized from the battery VB. The Moreover, the contact 18a is closed with energization to the relay coil 18b, and the pinion extrusion coil 11 is energized. As a result, the pinion is pushed out toward the ring gear.

  A contact 19a of the initial start motor relay 19 is provided on the second motor energization path 17b, and the second motor energization path 17b is opened and closed by switching the contact 19a. The relay coil 19 b of the initial start motor relay 19 is provided in parallel to the relay coil 18 b of the initial start pinion relay 18 on the low side of the initial start operation member 14. When the starter switch SW1 is turned on by the start operation of the initial start operation member 14 by the driver, the relay coil 19b is energized from the battery VB, and the contact 19a is closed by the energization, whereby the motor 12 is energized. Thereby, the motor 12 is driven and the pinion is rotated.

  In this system, a delay circuit 23 is disposed between the starter switch SW1 and the relay coil 19b of the initial starter motor relay 19. Thereby, in the initial start circuit 15, the motor 12 is energized after the pinion is pushed out, and the pinion is rotated. In the present embodiment, the initial start circuit 15 corresponds to a second energization circuit, the contact 18a and the contact 19a correspond to a second switch unit, and the relay coil 18b and the relay coil 19b correspond to a second opening / closing drive unit. To do.

  On the other hand, the restart circuit 16 is provided in parallel to the initial start circuit 15 and is supplied to the starter device 10 based on the start control signal output from the ECU 40 regardless of the opening / closing of the starter switch SW1. Turn on the power. Specifically, the restarting circuit 16 includes a first pinion energization path 24 a that connects the battery VB and the pinion extrusion coil 11 as an energization path (corresponding to the first energization path) that connects the battery VB and the starter device 10. The first motor energization path 24b for connecting the battery VB and the motor 12 is provided. Among them, a restart pinion relay 25 that switches between energization / non-energization of the pinion extrusion coil 11 is provided on the first pinion energization path 24a, and energization / non-energization of the motor 12 is provided on the first motor energization path 24b. A restart motor relay 26 for switching between non-energization is provided.

  The restart pinion relay 25 includes a contact 25a provided on the first pinion energization path 24a and a relay coil 25b that opens and closes the contact 25a. The restart pinion relay 25 closes the contact 25a by exciting the relay coil 25b, and opens the contact 25a by demagnetizing the relay coil 25b. The restart motor relay 26 includes a contact 26a provided on the first motor energization path 24b and a relay coil 26b that opens and closes the contact 26a. The restart motor relay 26 closes the contact 26a by excitation of the relay coil 26b, and opens the contact 26a by demagnetization of the relay coil 26b. The contact 25a and the contact 26a correspond to the first switch unit.

  The second pinion energization path 17a and the first pinion energization path 24a are connected to each other on the low side of the contact points 18a and 25a of the pinion relay, and are connected to the pinion terminal T1 provided in the starter device 10 via the pinion common path 27. It is connected. The second motor energization path 17b and the first motor energization path 24b are connected to each other on the low side of the contact points 19a and 26a of the motor relay, and are connected to the motor terminal provided in the starter device 10 via the motor common path 29. Connected to T2. The pinion common path 17 and the motor common path 29 correspond to the energization path of the starter device 10.

  The present control system includes an ECU (electronic control unit) 40 that forms the center of engine control, and the ECU 40 performs various controls related to engine operation. That is, as is well known, the ECU 40 is mainly composed of a microcomputer 41 composed of a CPU, ROM, RAM, etc., and the microcomputer 41 executes various control programs stored in the ROM so that the engine is in an engine operating state. Various control of the engine is executed accordingly. In this system, in addition to the above-described sensors, a rotation speed sensor 42 for detecting the engine rotation speed, a load sensor 43 for detecting an engine load such as an intake air amount and intake pipe negative pressure, and a switch sensor for detecting on / off of the starter switch SW1 (illustrated) Various sensors such as (omitted) are provided, and detection signals of these sensors are appropriately input to the ECU 40.

  The microcomputer 41 of the ECU 40 stops the engine combustion by automatically stopping the engine when a predetermined automatic stop condition is satisfied, and restarts the engine combustion when the predetermined restart condition is satisfied after the engine combustion is stopped. Then, idle stop control is performed to restart the engine. The engine stop condition includes, for example, at least one of the fact that the accelerator operation amount has become zero (becomes in an idle state), and that the brake pedal has been depressed. Further, the engine restart condition includes, for example, that the accelerator is depressed, the brake operation amount is zero, and the like.

  The ECU 40 is provided with a relay drive circuit 44 that controls energization to the starter device 10 via the restart circuit 16. The relay drive circuit 44 includes a plurality of transistors SW <b> 2 to SW <b> 4 as a first opening / closing drive unit that opens and closes the contact 25 a of the restart pinion relay 25 and the contact 26 a of the restart motor relay 26. Among these, the transistor SW2 is connected to the high side of each of the relay coils 25b and 26b via the output port P1, and the transistor SW3 is connected to the low side of the relay coil 25b via the output port P2. The transistor SW4 is connected to the low side of the relay coil 26b via the output port P3. In these transistors SW <b> 2 to SW <b> 4, the starter device 10 is energized via the restart circuit 16 by switching on / off according to the start control signal output from the microcomputer 41 when the restart condition is established. To control. In the present embodiment, the restart circuit 16 and the relay drive circuit 44 correspond to the first energization circuit, and the relay coil 25b, the relay coil 26b, and the transistors SW2 to SW4 correspond to the first opening / closing drive unit.

  The microcomputer 41 of the ECU 40 monitors the voltage at a plurality of detection positions on the circuit (voltage detection means). In this embodiment, the voltage is monitored at seven detection positions. Specifically, in the initial start circuit 15, the high-side voltage of the relay coil 18 b is input, and the voltage is detected using the pull-up resistor 21. Is detected as the first monitor M1, and the voltage on the high side of the relay coil 19b is input, and the pull-up resistor 22 is used to detect the voltage as the second monitor M2 (third voltage detection means). Further, in the restarting circuit 16, the midpoint voltage between the transistor SW2 and the relay coil 25b is detected as the third monitor M3 using the pull-down resistor 45, and the relay coil 25b and the transistor SW3 are detected using the pull-up resistor 46. The midpoint voltage is detected as the fourth monitor M4, and the midpoint voltage between the relay coil 26b and the transistor SW4 is detected as the fifth monitor M5 using the pull-up resistor 47 (first voltage detection means). The pinion common path 27 receives the terminal voltage of the pinion extrusion coil 11 and detects the voltage as the sixth monitor M6 using the pull-up resistor 28. The motor common path 29 determines the terminal voltage of the motor 12 as well. Then, the voltage is detected as the seventh monitor M7 by using the pull-up resistor 31 (second voltage detecting means).

  In the present embodiment, the ECU 40 includes the relay drive circuit 44. However, the ECU 40 does not need to include the relay drive circuit 44, and the ECU 40 and the relay drive circuit 44 may be provided independently. Good.

  By the way, in the initial start circuit 15 and the restart circuit 16, for example, an abnormality such as an OFF failure of each relay (abnormality in which the contact cannot be turned on) or a disconnection failure occurs, and the starter device 10 cannot be energized from the battery VB. In such a case, the starter device 10 cannot be driven, and as a result, the engine cannot be started. For example, when an off-failure of the restart circuit 16 occurs, if the engine is automatically stopped without noticing the abnormality, it is possible that the engine cannot be restarted when the restart condition is satisfied, leading to a road fault. In addition, when an on-failure of each relay provided in the initial start circuit 15 or the restart circuit 16 (abnormality in which the contact is on) is generated, energization from the battery VB to the starter device 10 is continued. As a result, there is a risk of causing a secondary failure or a tertiary failure of the starter energization circuit, or a failure of the engine or the starter device 10. Therefore, in this system, abnormality diagnosis of the initial start circuit 15 and the restart circuit 16 is performed.

  The abnormality diagnosis process of the initial start circuit 15 and the restart circuit 16 in this embodiment will be described in detail below. Here, first, the operation at the time of engine start when the initial start circuit 15 and the restart circuit 16 are normal will be described as a premise.

  FIG. 2 is a time chart when the engine is started by the initial start circuit 15. In FIG. 2, when the starter switch SW1 is switched from OFF to ON along with the start operation of the initial start operation member 14 by the driver, the contact 18a of the initial start pinion relay 18 is switched from the open state to the closed state, and the first monitor M1 The output voltage switches from low level to high level. In addition, the pinion extrusion coil 11 is energized with the closing of the initial start pinion relay 18, thereby pushing the pinion toward the engine. At this time, the output voltage of the seventh monitor M7 is switched from the low level to the high level.

  At a timing t12 after a predetermined delay time has elapsed from the pinion push-out timing t11, the contact 19a of the initial start motor relay 19 is switched from the open state to the closed state, and the output voltage of the second monitor M2 changes from the low level to the high level. Switch. Further, as the initial start motor relay 19 is closed, the motor 12 is driven and the pinion rotates. At this time, the output voltage of the sixth monitor M6 is switched from the low level to the high level.

  Next, normal operation when the engine is automatically restarted by the restart circuit 16 will be described with reference to the time chart of FIG. Here, a case where the motor 12 is driven after the pinion is pushed out is illustrated. In FIG. 3, when the restart condition is satisfied during the automatic engine stop, the start control signal is input to the gates of the transistors SW2 and SW3. Thereby, the transistors SW2 and SW3 are turned on, and the relay coil 25b is excited. Thereby, the contact 25a of the restart pinion relay 25 is switched from the open state to the closed state. At this time, the output voltage of the third monitor M3 is switched from the low level to the high level, and the output voltage of the fourth monitor M4 is switched from the high level to the low level. Further, as the restart pinion relay 25 is closed, the pinion extrusion coil 11 is energized, and the output voltage of the seventh monitor M7 is switched from the low level to the high level.

  At a timing t22 after a predetermined delay time has elapsed from the pinion push-out timing t21, a start control signal is input to the gate of the transistor SW4. Thereby, the transistor SW4 is turned on, the contact 26a of the restart motor relay 26 is switched from the open state to the closed state, and the output voltage of the fifth monitor M5 is switched from the high level to the low level. Further, as the restart motor relay 26 is closed, the motor 12 is energized, and the output voltage of the sixth monitor M6 is switched from the low level to the high level.

  Here, the combination of voltage levels (high level / low level) detected at the same time by each of the first monitor M1 to the seventh monitor M7 at a plurality of detection positions is 2 to the power of n (where n is the number of monitors). ), But there is only one normal combination. For example, in this system, voltages are detected at seven detection positions, and there are a total of 128 (2 to the 7th power) combinations of voltage detection results (high level / low level) detected at the same time. However, there is only one normal combination among these combinations. Therefore, when the combination of the voltage detection results at each detection position corresponds to a combination other than the normal combination, a circuit failure has occurred in at least one of the initial start circuit 15 and the restart circuit 16. It is assumed.

  In particular, in the starter system having two systems (first start circuit 15 and restart circuit 16) as the starter energization circuit as in this system, there are various forms of abnormality occurrence, and a single monitor displays the abnormality content. It may not be possible to identify. Specifically, for example, when the starter switch SW1 and the transistors SW3 and SW4 are turned off and the transistor SW2 is turned on and the sixth monitor M6 outputs a high level, the abnormality is detected only by the sixth monitor M6. It cannot be determined whether the transistor SW3 has an on-failure (a failure in which the on-state continues) or the restart pinion relay 25 has an on-failure. On the other hand, in this case, the abnormality content can be determined by referring to the output voltage detected at the same time as the sixth monitor M6 by the fourth monitor M4. That is, when the voltage detection result of the fourth monitor M4 is high level, it can be specified that the restart pinion relay 25 is on failure, and when it is low level, it is specified that the transistor SW3 is on failure. be able to.

  Therefore, in the present embodiment, the voltage detection results (detection results of the third voltage detection means) at the relay coils 18b and 19b (second opening / closing drive unit) by the first monitor M1 and the second monitor M2, the third monitors M3 to M3. The voltage detection results (detection results of the first voltage detection means) at the relay coils 25b and 26b (first open / close drive unit) by the five monitors M5, and the energization status of the starter device 10 by the sixth monitors M6 and M7 An appropriate voltage detection result (detection result of the second voltage detection means) is acquired at the same time, and based on the acquired combination of voltage detection results at each detection position, the initial start circuit 15 and the restart circuit 16 It is supposed to diagnose the circuit abnormality.

  Specifically, the ECU 40 indicates an abnormality indicating which of the combinations of voltage detection results (high level / low level) at each detection position (first monitor M1 to seventh monitor M7) is an abnormal combination. Storage means for storing the combination pattern in advance is provided. In this abnormality combination pattern, the abnormality content is stored in association with the abnormality combination. In the present embodiment, all the voltage detection results of the first monitor M1 to the seventh monitor M7 are acquired at the same time at a predetermined abnormality diagnosis timing, and the combination of the acquired voltage detection results and the abnormality stored in the storage means By comparing with the combination pattern, the normality / abnormality of the initial start circuit 15 and the restart circuit 16 is determined, and the content of the failure is specified together with the abnormality determination.

  First, an abnormality detection target in the abnormality diagnosis process of the present embodiment is shown in FIG. As shown in FIG. 4, in this abnormality diagnosis process, pinion off failure, motor off failure, pinion on failure, and motor on failure are subject to abnormality detection. The failure is classified into a failure relating to the circuit 15 and an abnormality relating to the restarting circuit 16. Each of these sections is further subdivided. For example, for the pinion ON failure, the failure of the initial start circuit 15 includes “on failure of the contact of the initial start pinion relay” and “upstream of the relay coil of the initial start pinion relay. ”And“ Ground fault downstream of the relay coil of the initial start pinion relay ”, and the failure of the restart circuit 16 is“ on failure of the contact of the restart pinion relay ”,“ relay of the restart pinion relay It is divided into “the power fault upstream of the coil”, “the ground fault downstream of the relay coil of the restart pinion relay” and the like.

  Further, which of the combinations of the voltage detection results at each detection position (the first monitor M1 to the seventh monitor M7) is an abnormal combination depends on which of the initial start circuit 15 and the restart circuit 16 is. It differs depending on whether it is in an energized state. In view of this, in this system, the abnormal combination pattern is determined as a drive pattern indicating which one of the initial start circuit 15 and the restart circuit 16 is energized, that is, the starter switch SW1 and the transistors SW2 to SW4 are turned on. This is determined in advance in association with a pattern of / off combination, and is stored in the storage means as circuit abnormality information.

  FIG. 5 is a diagram illustrating an example of circuit abnormality information. In the present embodiment, circuit abnormality information is provided as a table (abnormality determination table) in which drive patterns, abnormal combination patterns, and abnormal contents are associated with each other. In FIG. 5, the voltage detection results different from those in the normal state are indicated by hatching. Further, pinion-off failure and motor-off failure are omitted from the abnormality detection targets.

  In the abnormality determination table of FIG. 5, all combinations of the voltage detection results of the monitors (M1 to M7) and the abnormality contents corresponding to the combinations are set for each drive pattern of the starter switch SW1 and the transistors SW2 to SW4. Has been. This drive pattern shows the on / off combinations of the starter switch SW1 and the transistors SW2 to SW4, and there are 16 (2 to the 4th power) patterns as shown in FIG. That is, in the abnormality determination table of FIG. 5, all combinations (128 patterns) of the voltage detection results of each monitor and abnormality contents corresponding to the combinations are set for each of 16 driving patterns.

  For example, when the starter switch SW1 and the transistors SW3 and SW4 are turned off and the transistor SW2 is turned on, the abnormal combination pattern of the pattern 3 is acquired and referred to. For example, from each monitor, monitor 1 = L (low level), monitor 2 = L, monitor 3 = H (high level), monitor 4 = L, monitor 5 = H, monitor 6 = H, monitor 7 = When the output result of L is obtained at the same time, it can be specified that the on-failure of the restart pinion relay 25 has occurred by referring to the abnormal combination pattern of pattern 3.

  Next, the abnormality diagnosis process for the starter energization circuit will be described with reference to the flowchart of FIG. This process is executed by the ECU 40 at predetermined intervals.

  In FIG. 7, in step S <b> 11, the abnormal combination pattern of the currently implemented drive pattern is selected and acquired from the abnormality determination table (abnormal combination pattern determined for each of a plurality of drive patterns). In this step S11, one of a plurality of abnormal combination patterns is acquired according to which of the initial start circuit 15 and the restart circuit 16 is operated in the energized state (pattern acquisition means). In step S12, all voltage detection results (high level / low level) of the first monitor M1 to the seventh monitor M7 are acquired at the same time (voltage detection means). In step S13, the combination of the acquired voltage detection results at each detection position is compared with the abnormality combination pattern acquired from the abnormality determination table, and the failure content of the corresponding monitor combination is read (abnormality diagnosis means). In this way, the normality / abnormality of the initial start circuit 15 and the restart circuit 16 is determined and the content of the abnormality is specified.

  Here, in the drive pattern of FIG. 6, there are a pattern that occurs in the course of starting the engine and a pattern that does not.

  Specifically, as shown in FIG. 6, there are 16 combinations of drive patterns. Of these, there are drive patterns 2 when the engine is started in accordance with the start operation of the initial start operation member 14 by the driver. Is implemented. In the case of engine start based on the start control signal, the drive patterns 9 and 15 are performed when the pinion push-out is performed before the pinion rotation, and the drive patterns 10 and 15 are performed when the pinion rotation is performed first. . On the other hand, the drive patterns 3-8, 11-14, and 16 are combinations that cannot occur at the time of normal engine start, and there is no opportunity to implement them in the course of the event. On the other hand, it is considered that there is an abnormality that can be specified by a drive pattern that cannot occur at the time of starting the engine.

  Therefore, in the present embodiment, for the drive patterns (patterns 2, 9, 10, and 15) that occur in the course of starting the engine, abnormality diagnosis is performed when the engine is started with the drive pattern. On the other hand, with respect to drive patterns (patterns 3-8, 11-14, and 16) that cannot occur in the event, the starter switch SW1 and the transistors SW2 to SW4 are forcibly driven in accordance with the drive pattern at a predetermined timing. An abnormal diagnosis is carried out.

  In addition, there are drive patterns that cannot occur in the course of the event, in which power is supplied from the battery VB to the starter device 10 by forcible driving of the starter switch SW1 and transistors SW2 to SW4 for abnormality diagnosis, and in other cases. . Focusing on this point, in the present embodiment, abnormality diagnosis is performed at different timings for the former drive pattern and the latter drive pattern.

  Specifically, for the drive patterns (patterns 6 to 8, 12 to 14 and 16) in which the starter device 10 is energized, the starter device is energized via the initial start circuit 15 when the engine is initially started. 10 is driven by operating the restarting circuit 16 in the energized state at the same time as the energization by the initial start circuit 15 (forcing one or more of the transistors SW2 to SW4 in accordance with the driving pattern). An abnormality diagnosis is performed (by turning on). On the other hand, the drive patterns (patterns 3 to 5 and 11) in which the starter device 10 is not energized are in accordance with the drive patterns at a predetermined timing other than when the engine is started (for example, after the engine is started or the engine is stopped). An abnormality diagnosis is performed by forcibly turning on one or more of the transistors SW2 to SW4. For drive pattern 1 when all of starter switch SW1 and transistors SW2 to SW4 are off, abnormality diagnosis is performed at a timing other than when the engine is started. In addition, the abnormal combination pattern matched with the patterns 6-8, 12-14, and 16 is equivalent to the pattern at the time of forced energization.

  FIG. 8 is a flowchart showing the processing procedure of the drive pattern selection process. This process is executed at predetermined intervals by the microcomputer 41 of the ECU 40.

  In FIG. 8, in step S <b> 21, it is determined whether or not the starter device 10 is being driven (at the first start) in accordance with the start operation of the driver. Here, when it is detected by the switch sensor that the starter switch SW1 is in the ON state, it is determined that it is the first time of starting. In the case of the initial start, the process proceeds to step S22, and one of all drive patterns is selected from the drive patterns in which the starter switch SW1 is in the ON state. Here, one of the drive patterns 2, 6 to 8, 12 to 14, and 16 is selected. At this time, for example, a drive pattern is selected according to a predetermined order.

  In a succeeding step S23, it is determined whether or not the selected drive pattern is a normal pattern at the first start (drive pattern 2). If the normal pattern is selected, this process is terminated as it is. In this case, in the abnormality diagnosis process of FIG. 7, the abnormality combination pattern of the drive pattern 2 is acquired in step S11, and thereafter, the processes of steps S12 and S13 are executed.

  On the other hand, if a negative determination is made in step S23, the process proceeds to step S24 to forcibly drive the transistors SW2 to SW4 in accordance with the selected drive pattern. For example, when the drive pattern 6 is selected, a start control signal is output to the transistor SW2.

  If it is not at the time of the initial start, a negative determination is made in step S21, and the process proceeds to step S25, where it is determined whether or not the engine has been restarted according to a predetermined restart condition. . When the engine is automatically restarted, patterns 9, 10, and 15 may be performed. In the abnormality diagnosis process of FIG. 7, in step S11, any one of the patterns 9, 10, and 15 is detected as an active drive pattern. A combination pattern is acquired and the processes of steps S12 and S13 are executed.

  If the engine is not started, a negative determination is made in step S21 and step S25, the process proceeds to step S26, and it is determined whether or not it is immediately after the initial start. Here, an affirmative determination is made in step S26 when it is a period from when the starter switch SW1 is switched from on to off until the engine rotational speed reaches a predetermined combustion start rotational speed (for example, 500 to 600 rpm). If it is immediately after the initial start, the process proceeds to step S27, and one of the drive patterns (patterns 1, 3 to 5, 11) in which the starter switch SW1 is in an off state and the starter device 10 is not energized is selected. At this time, for example, a drive pattern is selected according to a predetermined order. Thereafter, the process proceeds to step S24, and the transistors SW2 to SW4 are forcibly driven in accordance with the selected drive pattern. For example, when the driving pattern 3 is selected, a start control signal is output to the transistor SW2.

  According to the embodiment described in detail above, the following excellent effects can be obtained.

  The detection results of the first monitor M1 and the second monitor M2 as voltage detection results in the second opening / closing drive unit, the detection results of the third monitor M3 to the fifth monitor M5 as voltage detection results in the first opening / closing drive unit, and the starter The detection results of the sixth monitor M6 and the seventh monitor M7 are acquired at the same time as the voltage detection results in accordance with the energization status of the apparatus 10, and based on the combination of the acquired detection results at each detection position, An abnormality diagnosis for the circuit 15 and the restart circuit 16 is performed. According to this configuration, even when there are a plurality of energization paths to the starter device 10 and there are various forms of abnormality occurrence, abnormality determination can be performed with high accuracy.

  An abnormal combination pattern indicating which combination of detection results at each detection position is an abnormal combination is associated with which one of the initial start circuit 15 and the restart circuit 16 is in an energized state. Storage means for storing in advance is provided, and any one of a plurality of abnormal combination patterns stored in the storage means is acquired according to which one of the initial start circuit 15 and the restart circuit 16 is operated in the energized state. The abnormality diagnosis is performed by comparing the acquired abnormality combination pattern with the acquired combination of voltage detection results at each detection position. The detection results at each detection position are different in the normal combination between when the starter device 10 is driven by the initial start circuit 15 and when the starter device 10 is driven by the restart circuit 16. Even if the combination is normal when the engine is started by 15, it corresponds to the combination when the engine is restarted by the restart circuit 16. Therefore, by adopting the above configuration, an abnormality diagnosis can be performed in accordance with the energized states of the initial start circuit 15 and the restart circuit 16, and erroneous detection can be avoided.

  Among the plurality of drive patterns, there are some that cannot occur at any time during the initial start or restart of the engine, but it is considered that there are also abnormalities that can be specified by the drive patterns. In view of this, when the starter device 10 is driven by energization via the initial start circuit 15 during the initial start operation by the driver, energization by the restart circuit 16 is performed at the same time as energization by the initial start circuit 15. Thus, the abnormality diagnosis is performed in a state where the initial start circuit 15 and the restart circuit 16 are operated in the energized state. Therefore, according to the above configuration, it is possible to suitably improve the accuracy of abnormality diagnosis.

  The present invention is applied to a tandem starter device 10 capable of separately controlling the movement of the pinion and the rotation of the pinion. In the energization circuit of the tandem starter device 10, it is necessary to move the pinion and rotate the pinion as the switch unit and the opening / closing drive unit. By applying the present invention, the above effects can be obtained more suitably.

(Other embodiments)
The present invention is not limited to the description of the above embodiment, and may be implemented as follows, for example.

  -The content of the fail safe process is changed based on the diagnosis result of the abnormality diagnosis process of FIG. When an abnormality is detected by the abnormality diagnosis process described above, depending on the content of the abnormality, the starter device 10 cannot be energized, and it may be necessary to prohibit automatic engine stop and restart by idle stop control. This is related to the initial start circuit 15, and the starter device 10 can be driven by energization via the restart circuit 16, that is, the engine can be restarted after the engine is automatically stopped. Therefore, when a circuit abnormality is detected, the fail-safe processing is not fixed to one, but is changed according to the result of the abnormality diagnosis, thereby performing fail-safe in accordance with the abnormality. Can do.

  -As an aspect of changing the content of the fail safe process, for example, when it is diagnosed that there is an abnormality by the above abnormality diagnosis process while the engine is running, the idle is performed when the abnormality is an abnormality related to the initial start circuit 15 The engine automatic stop by the stop control is permitted, and the engine automatic stop is prohibited in the case of an abnormality related to the restart circuit 16. In this case, since the automatic engine stop when the starter device 10 cannot be driven by the start control signal is prohibited, it is possible to avoid a situation in which the engine cannot be restarted after the automatic engine stop.

  -Another aspect of changing the contents of the fail safe process is as follows. When an abnormality is diagnosed by the above abnormality diagnosis process during the engine automatic stop by the idle stop control, the abnormality is related to the initial start circuit 15. In the case of abnormality, the starter device 10 is driven by energization via the restart circuit 16, and in the case of abnormality relating to the restart circuit 16, the starter device 10 is driven by energization via the initial start circuit 15. Let According to this configuration, even if the starter device 10 cannot be driven by energization via the restart circuit 16 when the restart condition is satisfied during the automatic engine stop, the initial start circuit 15 is not activated. Since the starter device 10 is driven by energization, it is possible to avoid a road fault.

  Here, in order to drive the starter device 10 by energization via the initial start circuit 15 when an abnormality relating to the restart circuit 16 occurs, for example, in the initial start circuit 15, the battery VB without the starter switch SW <b> 1. And an energizing path for connecting the battery VB and the relay coil 19b, and a switch for opening and closing the energizing path in accordance with a start control signal from the microcomputer 41 on each energizing path. Means are provided. When the restart condition is satisfied during the engine automatic stop, the starter device 10 is energized via the initial start circuit 15 by closing the switch means. Alternatively, when an abnormality relating to the restart circuit 16 is detected during the automatic engine stop, a notification unit that prompts the driver to operate the initial start operation member 14 is provided, and when the restart condition is satisfied during the automatic engine stop, The notification means may be configured to prompt the user to operate the initial start operation member 14, thereby driving the starter device 10 by energization via the initial start circuit 15.

  7 may be configured to prohibit the automatic engine stop by the idle stop control when at least one of the initial start circuit 15 and the restart circuit 16 is diagnosed by the abnormality diagnosis process of FIG. .

  A storage unit is provided for storing the diagnosis result of the abnormality diagnosis process as time-series data. Once an abnormality occurs in the initial start circuit 15 or the restart circuit 16, it is conceivable that secondary failure and tertiary failure occur in the energization circuit with the occurrence of the abnormality. In this configuration, the failure of the starter energization circuit is stored as time series data, so that the circuit failure can be captured in time series.

  In the above embodiment, among the drive patterns that cannot occur in the event, the battery VB is supplied via the initial start circuit 15 and the restart circuit 16 by forcibly driving the starter switch SW1 and the transistors SW2 to SW4 for abnormality diagnosis. Is applied to the starter device 10 (patterns 6 to 8, 12 to 14 and 16 in FIG. 6), the starter device 10 is energized through the initial start circuit 15 based on the initial start operation of the driver. Abnormality diagnosis was performed when driving (when starting for the first time). On the other hand, in this embodiment, when the starter device 10 is driven by energization through the restart circuit 16 when the start control signal is output from the microcomputer 41 (when restarting after automatic engine stop), An abnormality diagnosis is performed by turning on the switch SW1. Further, abnormality diagnosis may be performed by energizing the starter device 10 from the battery VB via the initial start circuit 15 and the restart circuit 16 at the time of initial engine start and engine restart.

  In the above embodiment, the drive pattern that cannot occur in the normal engine start is performed at a predetermined timing other than at the engine start, specifically at a timing immediately after the starter switch SW1 is switched from on to off. However, the execution timing of the abnormality diagnosis is not limited to this. For example, it may be performed while the engine is operating, or may be performed while the engine is automatically stopped. In addition, even a drive pattern that cannot occur at normal engine startup may occur due to an erroneous operation of the driver. Specifically, the restart condition is established during the automatic engine stop, and the driver erroneously operates the initial start operation member 14 while the starter device 10 is energized via the restart circuit 16. In this case, the starter device 10 is energized via the initial start circuit 15 at the same time as the energization via the restart circuit 16. In this case, since the drive patterns 12, 13, and 16 are established, an abnormality diagnosis can be performed when the drive patterns are established.

  In the above embodiment, the first voltage detection means (third monitor M3, fourth monitor M4, fifth monitor M5), second voltage detection means (sixth monitor M6, seventh monitor M7) and third voltage detection means The detection results of the first monitor M1 and the second monitor M2 are acquired at the same time, and the first start circuit 15 and the restart circuit 16 are abnormal based on the acquired combination of detection results at each detection position. Diagnosis was performed. On the other hand, in the present embodiment, the detection results of the first voltage detection means and the second voltage detection means are acquired at the same time, and the detection at each acquired detection position (the third monitor M3 to the seventh monitor M7) is performed. Based on the result combination, abnormality diagnosis of the restart circuit 16 is performed. Specifically, in the storage unit of the ECU 40, abnormality combination patterns indicating all combinations of the voltage detection results of the third monitor M3 to the seventh monitor M7 and the abnormality contents of each combination are stored in advance as an abnormality determination table. I remember it. The microcomputer 41 of the ECU 40 acquires the voltage detection results of the third monitor M3 to the seventh monitor M7 at the same time at a predetermined abnormality diagnosis timing (for example, every predetermined period) after the engine is started for the first time. By comparing the combination of the detected voltage results with the abnormal combination pattern stored in the storage means, the normality / abnormality of the restart circuit 16 is determined, and at the same time, the failure content is specified. . FIG. 9 shows an abnormal combination pattern when the transistor SW2 is on and the transistors SW3 and SW4 are off as an example of the abnormal combination pattern of the present embodiment. In the present embodiment, the abnormality diagnosis is performed after the engine is started, and the starter switch SW1 is off.

  Next, a processing procedure for diagnosing abnormality of the restart circuit 16 based on the voltage detection results of the third monitor M3 to the seventh monitor M7 will be described. This process is executed at predetermined intervals by the microcomputer 41 after the engine is initially started based on the start operation of the initial start operation member 14. First, the microcomputer 41 selects and acquires an abnormal combination pattern of the currently executed drive pattern (a combination of ON / OFF of the transistors SW2 to SW4) from the abnormality determination table. Subsequently, the voltage detection results of the third monitor M3 to the seventh monitor M7 are acquired at the same time (voltage detection means). Then, the acquired combination of voltage detection results at each detection position is compared with the abnormality combination pattern acquired from the abnormality determination table, and the corresponding failure content is read (abnormality diagnosis means).

  A first monitor M1 and a second monitor M2 are provided as third voltage detecting means, a third monitor M3 to a fifth monitor M5 are provided as first voltage detecting means, and a sixth monitor M6 and a seventh monitor are provided as second voltage detecting means. Although the monitor M7 is provided, the third voltage detection means has different voltages depending on whether the second switch part (contacts 18a, 19a) is closed or open in the second opening / closing drive part (relay coils 18b, 19b). As for the detection position indicating the value and the first voltage detection means, the first switch part (contacts 25a, 26a) in the first opening / closing drive part (relay coils 25b, 26b and transistors SW2 to SW4) is in the closed state and the open state, respectively. About the detection position which shows a different voltage value, and the 2nd voltage detection means, the detection position which shows a different voltage value by the energized state and non-energized state of the starter apparatus 10 respectively If the position is not limited to the above embodiment providing the first monitor M1~ seventh monitor M7. Moreover, the number is also arbitrary.

  In the above embodiment, the case where the tandem starter device 10 capable of independently controlling the pinion extrusion and the drive of the motor 12 is applied to the present invention has been described. A conventional starter device to be driven may be applied to the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Starter device, 16 ... Restart circuit (first energization circuit), 24a ... First pinion energization path (first energization path), 24b ... First motor energization path (first energization path), 25a, 26a ... Contact (first switch part), 25b, 26b ... relay coil (first opening / closing drive part), 27 ... pinion common circuit, 29 ... motor common circuit, 40 ... ECU (abnormality diagnosis means), 41 ... microcomputer, 44 ... relay Drive circuit (first energization circuit), M3 to M5, third to fifth monitors (first voltage detection means), M6, M7, sixth and seventh monitors (second voltage detection means), SW2 to SW4, transistors (First opening / closing drive unit), VB ... battery.

Claims (8)

An engine automatic that automatically stops the engine when a predetermined automatic stop condition is satisfied and restarts the engine by driving the starter device (10) when the predetermined restart condition is satisfied after the automatic stop condition is satisfied. In a starter control system having a stop / restart function,
A first switch unit (25a, 26a) provided in a first energization path (24a, 24b) for connecting a power source and the starter device, and a control unit as the restart condition is established. And a first open / close drive unit (25b, 26b, SW2 to SW4) that opens and closes the first switch unit in response to a start control signal output from (40). A first energization circuit (16, 44) for energizing the starter device;
First voltage detecting means (M3) for detecting a voltage at a detection position showing different voltage values in a state where the first switch portion is driven to be closed and a state where the first switch portion is opened in the energization path provided with the first opening / closing drive portion. ~ M5),
Second voltage detection means (M6, M7) for detecting voltages at detection positions showing different voltage values in the energized state and the non-energized state of the starter device in the energization path (27, 29) of the starter device;
The detection results of the first voltage detection means and the second voltage detection means are acquired at the same time, and an abnormality diagnosis of the first energization circuit is performed based on a combination of the acquired detection results at each detection position. Abnormality diagnosis means,
A starter control system comprising: A second switch portion (18a, 19a) provided in a second energization path (17a, 17b) for connecting a power source and the starter device, and opening and closing the second energization path; A second energization circuit (15) having a second opening / closing drive unit (18b, 19b) for opening and closing the two switch units, and energizing the starter device by closing the second switch unit;
Third voltage detecting means (M1) for detecting a voltage at a detection position showing different voltage values in a state where the second switch portion is driven to be closed and a state where the second switch portion is opened in the energization path provided with the second opening / closing drive portion. , M2)
The abnormality diagnosis unit acquires detection results of the first voltage detection unit, the second voltage detection unit, and the third voltage detection unit at the same time, and combines the acquired detection results at each detection position. The starter control system according to claim 1, wherein abnormality diagnosis of the first energization circuit and the second energization circuit is performed based on the first energization circuit. An abnormal combination pattern indicating which combination of detection results at each detection position is an abnormal combination is associated with which of the first energization circuit and the second energization circuit is in an energized state. Are determined in advance,
According to which of the first energization circuit and the second energization circuit is operated in an energized state, the pattern acquisition means for acquiring any of the abnormal combination patterns,
The starter control system according to claim 2, wherein the abnormality diagnosis unit performs abnormality diagnosis based on the abnormality combination pattern acquired by the pattern acquisition unit. When the starter device is driven by energization via the second energization circuit during the initial start operation by the driver, the first energization circuit is operated to be energized at the same time as energization by the second energization circuit. Comprising a first forced energization means;
As the abnormal combination pattern, a forced energization pattern that is an abnormal combination pattern when the first energization circuit and the second energization circuit are operated in an energized state is predetermined,
4. The starter control system according to claim 3, wherein the pattern acquisition unit acquires the forced energization pattern when the first energization unit operates the first energization circuit in an energized state. 5. When the starter device is driven by energization through the first energization circuit when the start control signal is output, the second energization circuit is operated to be energized at the same time as energization by the first energization circuit. Second forcible energizing means to
As the abnormal combination pattern, a forced energization pattern that is an abnormal combination pattern when the first energization circuit and the second energization circuit are operated in an energized state is predetermined,
The starter control system according to claim 3, wherein the pattern acquisition unit acquires the forced energization pattern when the second energization unit operates the second energization circuit to an energized state. As fail-safe means for changing the content of fail-safe processing according to the diagnosis result of the abnormality diagnosis means, when the abnormality diagnosis means diagnoses that there is an abnormality during engine operation, the abnormality is an abnormality related to the second energization circuit. The starter control system according to any one of claims 2 to 5 , further comprising means for permitting the automatic stop in the case of and preventing the automatic stop in the case of an abnormality relating to the first energization circuit. As fail-safe means for changing the contents of fail-safe processing according to the diagnosis result of the abnormality diagnosis means, when the abnormality diagnosis means diagnoses that there is an abnormality during the automatic stop, the abnormality relates to the second energization circuit. Means for driving the starter device by energization via the first energization circuit in the case of an abnormality, and for driving the starter device by energization via the second energization circuit in the case of an abnormality relating to the first energization circuit. A starter control system according to any one of claims 2 to 6 . The starter device includes a pinion drive coil (11) that moves a pinion of the starter device toward a ring gear connected to an output shaft of an engine, and a motor (12) that rotates the pinion.
The first energization path includes a pinion energization path (24a) for connecting the power source and the pinion drive coil, and a motor energization path (24b) for connecting the power source and the motor,
As the first switch unit, a pinion switch unit (25a) provided in the pinion energization path, and a motor switch unit (26a) provided in the motor energization path,
As the first opening / closing drive part, a pinion opening / closing drive part (25b, SW 2 , SW 3 ) for opening and closing the pinion switch part and a motor opening / closing drive part (26b, SW2, SW4) for opening and closing the motor switch part are provided. Prepared,
As the first voltage detecting means, means (M3, M4) for performing voltage detection at a predetermined detection position of an energization path provided with the pinion opening / closing drive section, and a predetermined energization path provided with the motor opening / closing drive section. Means (M3, M5) for detecting voltage at the detection position of
The said 2nd voltage detection means is provided with the means (M6) which performs voltage detection by the said pinion energization path | route, and the means (M7) which performs voltage detection by the said motor energization path | route as described in any one of Claim 1 thru | or 7 The starter control system described.

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