Control device with a machine start unit and a gearbox control unit

Abstract

Control device (1) attached to a vehicle, the control device (1) comprising: a machine starting unit (10) that starts a machine (2) of the vehicle under a condition that power is supplied at a higher voltage than a first drive voltage; a machine control unit (11) that controls the operation of the machine start unit (10); and a transmission control unit (12) which drives a transmission (3) of the vehicle under a condition that power is supplied at a higher voltage than a second drive voltage which is higher than the first drive voltage, wherein the transmission control unit (12) sends a machine start authorization signal to the machine control unit (11) in a case where a voltage of a power supplied by a vehicle battery is the second drive voltage or higher, and The machine control unit (11) of the machine start unit (10) allows the machine (2) to be started under the condition that the machine control unit (11) receives the machine start permission signal sent by the transmission control unit (12).

Description

Technical field

[0001] The present disclosure relates to a control device that controls the starting of a machine (engine) of a vehicle. Background of the technology

[0002] A machine starter motor, powered by a battery, is used to start a vehicle's engine. It is known that a voltage drop occurs in the battery when the machine starter motor is driven (see, for example, JP-2009-293451 A).

[0003] DE 102 22 425 A1 relates to a drive system for use in a hybrid vehicle, comprising an internal combustion engine, an electric motor coupled to the internal combustion engine and an electrical storage medium during operation, and a drive system controller for actuating the drive system. The drive system controller modifies the operating states of the electric motor during a start-up sequence of the internal combustion engine.

[0004] DE 10 2006 013 502 A1 relates to a drive device for a full hybrid drive which has an internal combustion engine, an electric motor, a coupling for optionally connecting the internal combustion engine to the electric motor for transmitting torques and an additional unit which is permanently connected to the electric motor for transmitting torques or can optionally be connected via an additional unit coupling.

[0005] US 2015 / 0291174 A1 concerns a control device for a vehicle that changes a gear range of an automatic transmission by actuating an electric shift actuator and starts an engine by actuating a starter.

[0006] Finally, the subsequently published DE 11 2017 005 438 T5 relates to a power engine starting system configured such that power is supplied to the engine from a first power source while power supply from the first power source to an engagement device is stopped, and power is supplied to the engagement device from a second power source while power supply from the second power source to the engine is stopped, for a period of time until a driving gear is engaged with a driven gear by the engagement device for starting the power engine. Summary of the invention: Technical problem

[0007] In a vehicle such as a truck, the voltage required to start the engine may differ from the voltage required to power a mechanism other than the engine. If the voltage required to power the other mechanism is higher than the voltage required to start the engine, it may be difficult to start the other mechanism (for example, a transmission or braking system), depending on the state of the battery, even if the engine can be started. In this case, even if the vehicle's engine can be started, if the other mechanism cannot be powered, the vehicle's control may be impaired.

[0008] One aspect of the present disclosure provides a control device capable of improving safety after the starting of a vehicle's engine. Solution to the problem

[0009] One aspect of the present disclosure is a control device that is attached to a vehicle.

[0010] The control device includes: a machine starting unit that starts a machine of the vehicle under a condition that power is supplied at a higher voltage than a first drive voltage; a machine control unit that controls the operation of the machine start unit; and a transmission control unit that drives a transmission of the vehicle under a condition that power is supplied at a higher voltage than a second drive voltage, which is higher than the first drive voltage. Here, the transmission control unit sends a machine start authorization signal to the machine control unit in a case where the voltage of a power supplied by a vehicle battery is the second drive voltage or higher, and The machine control unit of the machine start unit allows the machine to be started under the condition that the machine control unit receives the machine start authorization signal sent by the transmission control unit.

[0011] The transmission control unit can measure the voltage value of a power supplied by the battery at a predetermined time interval in order to update the voltage value as a current value. The control device may further include an ignition switch that receives an instruction from a driver of the vehicle to supply power from the battery to the The machine start unit receives the machine control unit and the transmission control unit, and The transmission control unit can stop updating the voltage value until a predetermined initial update waiting time has elapsed, since a power supply from the battery has started.

[0012] The ignition switch can also receive an instruction to start the machine from the driver, The machine control unit can send a start instruction signal to the transmission control unit, while the ignition switch receives the start instruction, and While the transmission control unit is receiving the start instruction signal, the transmission control unit can set a voltage value obtained by subtracting a predetermined reference voltage threshold from the voltage value before the update as the voltage value after the update in a case where a measured value of the voltage value after the update is lower than the voltage value before the update by the reference voltage threshold or more.

[0013] The transmission control unit can stop updating the voltage value until a predetermined second update wait time has elapsed since the reception of the start instruction signal was completed. Advantageous effects of the invention

[0014] According to the present disclosure, it is possible to improve the safety after the starting of a vehicle's engine. Brief description of the drawings Fig. Figure 1 schematically shows a functional configuration of a control device and a functional configuration of a vehicle with respect to the control device according to one embodiment. Fig. Figure 2 schematically shows temporal changes in the state of an ignition switch, the voltage of a battery, and the state of a starter authorization signal. Fig. Figure 3 shows the first half of a sequence diagram illustrating the control processing carried out by the control device, according to the embodiment. Fig. Figure 4 shows the latter half of the sequence diagram, which shows a sequence of control processing performed by the control device, according to the embodiment. Fig. Figure 5 is a flowchart showing the sequence of a voltage update processing operation performed by a transmission control unit during the reception of an instruction signal, according to the embodiment. Description of embodiments<Entwurf einer Ausführungsform>

[0015] A design of an embodiment is described. A control device according to the embodiment is installed in a vehicle that includes an automated manual transmission (AMT) and is configured to control the starting of a machine. The AMT is a transmission in which the action of a sleeve for clutch operation and gear selection in a manual transmission (MT) has been automated using an actuator. In the control device installed in the vehicle according to the embodiment, a first drive voltage, which is a drive voltage of a starter motor used to start the machine, is different from a second drive voltage, which is a drive voltage of the AMT actuator.

[0016] Specifically, in the vehicle equipped with the control device according to the embodiment, the first drive voltage is, for example, 10.5 V and the second drive voltage is, for example, 18 V. Accordingly, the first drive voltage is lower than the second drive voltage. Therefore, if the voltage of a battery attached to the vehicle exceeds the first drive voltage, the control device can drive the starter motor to start the engine, even if the battery voltage is lower than the second drive voltage. However, in a case where the AMT (which is the transmission) cannot be driven, even if the engine can be started, the control device will not start the vehicle's engine.

[0017] Therefore, according to the embodiment, the control device sets a condition for starting the machine that the voltage of the battery attached to the vehicle is the second drive voltage or higher. In other words, according to the embodiment, the control device allows the machine to start when the battery voltage is the second drive voltage or higher, and prohibits the machine from starting if the battery voltage is lower than the second drive voltage.

[0018] Accordingly, the control device according to the embodiment can ensure that the transmission can be driven after the machine has been started. Therefore, the control device according to the embodiment can prevent a situation in which, for example, the machine is started in a state where the clutch is engaged and cannot be disengaged. As a result, the control device according to the embodiment can improve the safety of the vehicle after the machine has been started. <Funktionelle Konfiguration von Steuervorrichtung 1 und Fahrzeug>

[0019] Fig. Figure 1 schematically shows a functional configuration of a control device 1 and a functional configuration of a vehicle related to the control device 1 according to the embodiment. Fig. Figure 1 shows the configuration shown by the control device 1 according to the embodiment, and other configurations are omitted.

[0020] The vehicle, which is fitted with the control device 1 according to the embodiment, comprises a machine 2, a transmission 3, and a battery 4. The control device 1 comprises a machine starter unit 10, a machine control unit 11, a transmission control unit 12, and an ignition switch 13, and the battery 4 comprises a first battery 4a and a second battery 4b. Fig. A solid line connecting each unit indicates an electrical connection, and a dashed line indicates a communication-based connection.

[0021] In battery 4, the first battery 4a and the second battery 4b, each with a voltage of 12 V, are connected in series. Therefore, when battery 4 is sufficiently charged, the voltage across a circuit including a conductive wire A between the first battery 4a and the second battery 4b is 12 V. The voltage across a circuit including a conductive wire B on the positive electrode side of the second battery 4b is 24 V. As shown in Fig. As shown in Figure 1, the machine start unit 10, the machine control unit 11 and the ignition switch 13 of the control device 1 are supplied with the voltage from the first battery 4a and the transmission control unit 12 is supplied with a combined voltage from the first battery 4a and the second battery 4b.

[0022] Ignition switch 13 is configured to start or stop the energizing of an electrical system provided in the vehicle, or to start or stop the vehicle's machine 2. The Fig. Figure 1 shows an example of an ignition switch 13 in which a driver of the vehicle controls the energizing of the electrical system and the starting of the engine 2 by inserting a key into a key cylinder (not shown) provided in the ignition switch 13 and turning the engine key 5. Although not shown, according to the embodiment, the ignition switch 13 can be a push-start type, in which a button is pressed.

[0023] In the off position of the ignition switch 13, the battery 4 and the control unit 1 are electrically disconnected. When the vehicle operator inserts the key 5 into the ignition switch 13 and turns it, the voltage of the battery 4 first shifts to an energized state, energizing the engine starter 10, the engine control unit 11, the transmission control unit 12, and the ignition switch 13. In this state, if the operator continues to turn the key 5, the engine starter 10, which is a starter motor, operates to start the engine 2.

[0024] Here, the machine starter unit 10 starts the vehicle's machine 2 under the condition that power at a voltage higher than the initial drive voltage is supplied by battery 4. The machine control unit 11 controls the operation of machine 2, which is an internal combustion engine. Therefore, the machine control unit 11 controls the starting of machine 2 by controlling the operation of the machine starter unit 10.

[0025] The transmission control unit 12 drives the vehicle's transmission 3 under the condition that power at a voltage higher than the second drive voltage, which is higher than the first drive voltage, is supplied by the battery 4. The transmission control unit 12 acquires the voltage of the power supplied by the battery 4 as soon as it is energized. Therefore, the transmission control unit includes a voltage measuring device (not shown).

[0026] When energized, the transmission control unit 12 measures a voltage value of the battery 4 at a predetermined time interval and updates the voltage value as a "current value". Here, the "predetermined time interval" is a voltage value update reference interval to which the transmission control unit 12 refers when acquiring the voltage value of the battery 4. A value for the voltage value update reference interval can be determined experimentally, taking into account the voltage characteristics of the battery 4, characteristics of the electrical system provided in the vehicle, and the like, and is, for example, equal to 20 milliseconds.

[0027] In a case where the voltage of the power supplied by battery 4 is equal to or higher than the second drive voltage, the transmission control unit 12 sends a machine start authorization signal to the machine control unit 11 via a communication network. The communication network is implemented using a well-known Controller Area Network (CAN).

[0028] The machine control unit 11 causes the machine start unit 10 to start machine 2, provided that the machine control unit 11 receives the machine start authorization signal sent by the transmission control unit 12. In other words, if the machine control unit 11 receives the machine start authorization signal sent by the transmission control unit 12, the machine control unit 11 allows the machine start unit 10 to start machine 2. Conversely, if the machine control unit 11 does not receive the machine start authorization signal sent by the transmission control unit 12, the machine control unit 11 prevents the machine start unit 10 from starting machine 2.

[0029] Accordingly, control device 1 does not start machine 2 if it has not been confirmed that the second drive voltage is being supplied to control transmission 3. As a result, control device 1 can prevent machine 2 from starting in a state where transmission 3 cannot be controlled, thus improving vehicle safety after the machine has started.

[0030] As described above, the ignition switch 13 is a mechanism for receiving an instruction from the driver of the vehicle to supply power from the battery 4 to the engine starter unit 10, the engine control unit 11 and the transmission control unit 12. The ignition switch 13 has four states of "Off", "Accessory", "On" and "Start" according to a rotation angle of the engine key 5.

[0031] The "off" state is a state in which battery 4 and control unit 1 are electrically disconnected. The "accessory" state is a state in which the electrical system (e.g., vehicle audio or the like) that is not necessary for driving the vehicle is powered. The "on" state is a state in which the machine starter unit 10 is also powered. The "start" state is a so-called "starting state" in which the machine starter unit 10 is activated to attempt to start machine 2; that is, a state in which a start instruction from machine 2 is received from the driver.

[0032] The machine control unit 11 acquires information via the communication network as to whether the ignition switch 13 is in the "accessory" state, the "on" state, or the "start" state. The machine control unit 11 then sends the state of the ignition switch 13 to the transmission control unit 12. Thus, the transmission control unit 12 can detect that the machine starter unit 10 is using the power of the battery 4 to start the machine 2. Specifically, the machine control unit 11 proceeds to send a start instruction signal to the transmission control unit 12, while the ignition switch 13 receives the start instruction from the operator. Accordingly, the transmission control unit 12 can detect that the machine starter unit 10 is operating.

[0033] Here, it takes approximately several hundred milliseconds until communication via the communication network becomes possible, as the control device 1 is energized. Therefore, it takes approximately several hundred milliseconds until communication between the engine control unit 11 and the transmission control unit 12, and communication between the engine control unit 11 and the ignition switch 13, is initiated, as the control device 1 is energized. On the other hand, if the vehicle driver inserts the engine key 5 into the ignition switch 13 and simultaneously performs a so-called "one-time shift" of the engine key 5 into the "start" position, the engine start unit 10 operates before the communication network in the control device 1 is activated.

[0034] Generally, when the engine start unit 10 is operating and consuming power from battery 4, the voltage of engine 2 temporarily drops. If the transmission control unit 12 can detect via the engine control unit 11 that the ignition switch 13 is in the "start" state, the temporary voltage drop of engine 2 can also be ignored. However, if the driver of the vehicle performs a single shift, the voltage drop of battery 4 may occur before the transmission control unit 12 detects the ignition switch 13.

[0035] In this case, if the voltage of battery 4 falls below the second drive voltage due to the voltage drop of battery 4, the transmission control unit 12 stops sending the start authorization signal to the engine control unit 11. As a result, the engine control unit 11 can stop the operation of the engine starter unit 10. When the operation of the engine starter unit 10 stops, the voltage of battery 4 returns to its original state, and the transmission control unit 12 sends the start authorization signal to the engine control unit 11 again. Therefore, the voltage of battery 4 drops due to the operation of the engine starter unit 10, and then the same process can be repeated.

[0036] Therefore, the transmission control unit 12 stops updating the voltage value of battery 4 until a predetermined initial update wait time has elapsed since the power supply from battery 4 was initiated to energize the transmission control unit 12. Thus, the transmission control unit 12 maintains the voltage value of battery 4, acquired immediately after the energized state, as the current value until the initial update wait time has elapsed since the transmission control unit 12 was energized.

[0037] Here, the "first update wait time" is an "energization start time update reference time" that is referenced when the transmission control unit 12 next acquires the voltage value of battery 4 after the transmission control unit 12 has been energized and initially acquired the voltage value of battery 4. The transmission control unit 12 relies on the battery 4 voltage update within the voltage value update reference interval described above. However, the transmission control unit 12 updates the voltage immediately after the first update wait time has elapsed following energization to appropriately send the start-authorization signal in a case where the vehicle driver performs a one-time shift. Therefore, the first update wait time is longer than the voltage value update reference interval and is, for example, 2 seconds.

[0038] Fig. Figure 2 schematically shows temporal changes in the state of the ignition switch 13, in the voltage of the battery 4, and in a state of the starter signal. Specifically, an upper part of (a) shows Fig. 2. whether the ignition switch 13 is in the "start state", and a lower part of Fig. Figure 2 shows a signal sent by the machine control unit 11 and received by the transmission control unit 12, indicating the “start state” of the ignition switch 13. As in (a) of Fig. As shown in Figure 2, a time delay is generated based on a communication delay between a time when the ignition switch 13 is in the “start state” and the status signal sent by the machine control unit 11 and received by the transmission control unit 12.

[0039] An upper part of (b) of Fig. Figure 2 shows a time change in the voltage of the circuit comprising the conducting wire B, on the positive electrode side of the second battery 4b, and a lower part of (b) of Fig. Figure 2 shows a change over time in the voltage of the circuit comprising the conducting wire A, between the first battery 4a and the second battery 4b. As in (b) of Fig. As shown in Figure 2, at time T1, when the ignition switch 13 becomes the "start state," the voltage of the circuit comprising the conductive wire A and the voltage of the circuit comprising the conductive wire B drop temporarily and significantly with the operation of the machine starting unit 10. As a result, the voltage of the circuit comprising the conductive wire B on the positive electrode side of the second battery 4b is temporarily lower than the second drive voltage. For a while after time T1, the voltage of battery 4 fluctuates due to the operation of the ignition switch 13.

[0040] (c) of Fig. 2 shows whether the transmission control unit 12 sends the start authorization signal to the machine control unit 11. In Fig. 2 specifies a time T0, a time when the control device 1 is energized. As in (b) of Fig. As shown in Figure 2, the voltage of the circuit comprising the conductive wire B exceeds the second drive voltage at time T0, so that the transmission control unit 12 sends the start-enable signal to the machine control unit 11. In (c) of Fig. 2 is a period specified by a reference symbol D1, the first update wait time D1 described above. The machine control unit 11 stops updating the voltage of battery 4 until the first update wait time D1 expires after the machine control unit 11 has been energized.

[0041] If the driver of the vehicle performs a one-time shift, time T0 and time T1 are in Fig. 2 close together. In this case, the voltage drop of battery 4 occurs during the first update wait time D1. The update of the battery 4 voltage value, performed by the transmission control unit 12, is stopped until the first update wait time expires, so that the "current value" of the battery 4 voltage is maintained at the voltage value immediately after energization. As a result, the transmission control unit 12 can prevent the transmission of the start-authorization signal, which is associated with the operation of the machine start unit 10, from being stopped due to the temporary voltage drop of battery 4.

[0042] The voltage drop of battery 4 associated with the operation of the machine starter unit 10 is temporary, so the transmission control unit 12 can stop updating the battery 4 voltage value during operation of the machine starter unit 10. However, if the battery 4 voltage is permanently lower than the initial drive voltage for any reason, the machine 2 cannot be started, and the operating state of the machine starter unit 10 continues. If the battery 4 voltage value update is stopped during operation of the machine starter unit 10, the transmission control unit 12 cannot restart the voltage value update in a case where the battery voltage drops permanently.

[0043] Therefore, even when the machine start unit 10 is operating, the transmission control unit 12 continues to update the voltage value of battery 4. However, the transmission control unit 12 performs the "voltage update processing during instruction signal reception" while receiving the start instruction signal from the machine control unit 11.

[0044] Specifically, while the transmission control unit 12 receives the start instruction signal from the machine control unit 11, the transmission control unit 12 sets V0 - Vt, which is a voltage value obtained by subtracting a predetermined reference voltage threshold Vt from a voltage value V0 of battery 4 before the update, as a voltage value V1 of battery 4 after the update in a case where a measured value of the voltage value of battery 4 after the update is lower than the voltage value V0 of battery 4 before the update by the reference voltage threshold Vt or more. That is, while the transmission control unit 12 receives the start instruction signal from the machine control unit 11, the transmission control unit 12 limits the magnitude of the voltage drop associated with the update of the voltage value of battery 4.

[0045] Here, the "reference voltage threshold" is a lower limit of an update value when the transmission control unit 12 updates the voltage value of battery 4 in a downward direction during voltage update processing upon receiving the instruction signal. The reference voltage threshold can be determined experimentally, taking into account the power of battery 4, the power consumption of the ignition switch 13, and the like, and is, for example, equal to 0.5 V.

[0046] For example, the voltage value V0 of battery 4 before the update is 24 V, and the measured voltage value of battery 4 after the update is 19 V. In this case, the voltage value becomes -5 V, which is obtained by subtracting the voltage value V0 from the measured value. However, in this case, the measured value drops by a voltage value higher than 0.5 V, which is the reference voltage threshold. Therefore, the transmission control unit 12 sets the voltage value V1 of battery 4 after the update as V1 = V0 - Vt = 23.5 V.

[0047] In the case where the voltage drop of battery 4 is temporary, the voltage of battery 4 returns to its initial value over time. Therefore, it is ensured that the voltage of battery 4 does not fall below the second drive voltage during the voltage update processing while receiving the instruction signal. On the other hand, in the case where the voltage drop of battery 4 is permanent, even if the voltage update magnitude of battery 4 is limited to the reference voltage threshold, the voltage of battery 4 will eventually fall below the second drive voltage. Therefore, the transmission control unit 12 can detect that the voltage drop of battery 4 is permanent and can stop sending the start-authorization signal to the machine control unit 11.

[0048] In a case where the measured voltage value of battery 4 after the update is higher than the voltage value V0 of battery 4 before the update, the transmission control unit 12 sets the measured value as the voltage value V1 of battery 4 after the update. This is because an increase in the voltage of battery 4 does not impede the control processing of the control device 1.

[0049] In Fig. Time T2 indicates the point in time when the driver of the vehicle returns the state of the control device 1 from the start state to the on state. Due to the time delay of the communication network, the transmission control unit 12 stops the transmission of the start instruction signal by the machine control unit 11 at a time T3, which is slightly later than time T2.

[0050] As in Fig. As shown in Figure 2, immediately after the vehicle driver returns the ignition switch 13 from the start state to the on state, the machine start unit 10 also operates for a short time. Therefore, the transmission control unit 12 stops updating the voltage value of the battery 4 until a predetermined second update waiting time D2 has elapsed since the reception of the start instruction signal sent by the machine control unit 11 has been completed.

[0051] Here, the "second update wait time" is the "start-up time update reference time" to which the voltage value of battery 4 is referred the next time it is acquired after the state of the ignition switch 13 has changed from the start state to the on state. The second update wait time can be determined experimentally, taking into account the voltage characteristics of battery 4, the power used by the ignition switch 13, and the like, and is, for example, 2 seconds, which is the same as the first update wait time.

[0052] The transmission control unit 12 waits for the battery 4 voltage value to be updated until the second update waiting period expires. The next time the transmission control unit 12 acquires the battery 4 voltage value after the ignition switch 13 changes from the start state to the on state, the transmission control unit 12 can then prevent the battery 4 voltage value from affecting the continued operation of the engine start unit 10 once the battery 4 voltage value has been updated. As a result, the transmission control unit 12 can detect the battery 4 voltage value with good accuracy. <Verarbeitungsfluss einer durch die Steuervorrichtung 1 ausgeführten Steuerverarbeitung>

[0053] Fig. 3 and Fig. Figure 4 shows sequence diagrams illustrating the control processing sequence performed by the control device 1 according to the embodiment. Specifically, Figure 4 shows... Fig. 3 a first half of a sequence diagram showing the sequence of control processing performed by the control device 1 according to the embodiment, and Fig. Figure 4 shows the latter half of the sequence diagram, which shows the sequence of control processing carried out by the control device 1 according to the embodiment.

[0054] First, the first half of the sequence diagram is analyzed with reference to Fig. 3 described. When the driver of the vehicle operates the engine key 5 to turn on the ignition switch 13, the ignition switch 13 receives an energizing instruction to energize the control unit 1 from the driver (S2). As a result, the engine start unit 10, the engine control unit 11, and the transmission control unit 12 can each receive the power supplied by the battery 4 and begin to be energized (S4).

[0055] The transmission control unit 12 acquires the voltage of battery 4 when energized (S6). While the voltage of battery 4 is lower than the second drive voltage (No in S8), the transmission control unit 12 returns to step S6 and continues acquiring the voltage of battery 4. In the case where the voltage of battery 4 is the second drive voltage or higher (Yes in S8), the transmission control unit 12 sends the start-authorization signal to the machine control unit 11 (S10).

[0056] The transmission control unit 12 stops updating the voltage value of battery 4 (S14) until the first update wait time expires after the transmission control unit 12 has been energized (No in S12). The update of the voltage value of battery 4 restarts when the first update wait time has expired since the transmission control unit 12 was energized (Yes in S12).

[0057] The machine control unit 11 receives the start authorization signal (S16) sent by the transmission control unit 12. When the ignition switch 13 receives an instruction to start the machine 2 from the driver (S18), the machine control unit 11 instructs the machine start unit 10 to start the machine 2 (S20).

[0058] Next, the latter half of the sequence diagram will be analyzed with reference to Fig. 4 described. A, B, C and D in Fig. 4 each denote continuations of A, B, C and D in Fig. 3.

[0059] The machine start unit 10 starts the operation of machine 2 (S22). The machine control unit 11 instructs the machine start unit 10 to start machine 2 and initiates the transmission of the start instruction signal to the transmission control unit 12 (S24). The transmission control unit 12 receives the start instruction signal from the machine control unit 11 (S26). While the transmission control unit 12 is receiving the start instruction signal from the machine control unit 11, the transmission control unit 12 performs the "voltage update processing during instruction signal reception" (S28).

[0060] When the machine start unit 10 successfully starts the machine 2 (S30), the operator returns the ignition switch 13 from the start state to the on state, so that the state of the ignition switch 13 changes from the start state to the on state (S32). Accordingly, the machine control unit 11 stops sending the start instruction signal to the transmission control unit 12 (S34).

[0061] The transmission control unit 12 stops updating the voltage value of battery 4 (S38) until the second update wait time expires after the transmission of the start instruction signal has stopped (No in S36). The transmission control unit 12 restarts updating the voltage value of battery 4 when the second update wait time has expired after the transmission of the start instruction signal has stopped (Yes in S36). <Ablauf einer Spannungsaktualisierungsverarbeitung während des Empfangs eines Anweisungssignals>

[0062] Fig. Figure 5 is a flowchart showing the sequence of voltage update processing performed by the transmission control unit 12 during the reception of the instruction signal according to the embodiment, and step S28 in Fig. 4 shows in detail.

[0063] The transmission control unit 12 acquires the voltage value of battery 4 (S280). If the acquired voltage value is lower than the voltage value before acquisition by the reference voltage threshold or more (Yes in S282), the transmission control unit 12 updates a value obtained by subtracting the reference voltage threshold from an original voltage value as a new voltage value (S284). If the acquired voltage value is not lower than the voltage value before acquisition by the reference voltage threshold or more (No in S282), the transmission control unit 12 updates the acquired voltage value as the new voltage value (S286).

[0064] While the start instruction signal is still being received from machine control unit 11 (Yes in S288), the transmission control unit 12 returns to step S280 and continues the processing described above. When the reception of the start instruction signal from machine control unit 11 is complete (No in S288), the processing ends in the present flowchart. <Wirkung der Steuervorrichtung 1 gemäß der Ausführungsform>

[0065] As described above, according to the embodiment, the control device 1 can improve safety after starting the machine in the vehicle, in which the voltage for starting the machine 2 is lower than the voltage for controlling the transmission 3.

[0066] The present invention has been described using the embodiment described above. However, the technical scope of the present invention is not limited to that described in the embodiment described above, and various modifications and changes can be made within its scope. For example, a specific embodiment for distributing and integrating devices is not limited to the embodiment described above, and all or part of it can be functionally or physically distributed and integrated into any unit. New embodiments generated by any combination of several embodiments are also included in the embodiment of the present invention. The effects of the new embodiments generated by the combinations include the effects of the original embodiment.

[0067] The present application is based on Japanese patent application No. JP2017-208140, filed on October 27, 2017, the contents of which are incorporated herein by reference. Industrial applicability

[0068] The control device in the present disclosure is useful in improving safety after the vehicle's engine has been started. List of reference symbols 1 Control device 2 Machine 3 gearboxes 4 batteries 4A first battery 4B second battery 5 machine keys 10 Machine start unit 11 Machine control unit 12 Transmission control unit 13 Ignition switches

Claims

[1] Control device (1) attached to a vehicle, the control device (1) comprising: a machine starting unit (10) that starts a machine (2) of the vehicle under a condition that power is supplied at a higher voltage than a first drive voltage; a machine control unit (11) that controls the operation of the machine start unit (10); and a transmission control unit (12) which drives a transmission (3) of the vehicle under a condition that power is supplied at a higher voltage than a second drive voltage which is higher than the first drive voltage, wherein the transmission control unit (12) sends a machine start authorization signal to the machine control unit (11) in a case where a voltage of a power supplied by a vehicle battery is the second drive voltage or higher, and The machine control unit (11) of the machine start unit (10) allows the machine (2) to be started under the condition that the machine control unit (11) receives the machine start permission signal sent by the transmission control unit (12). [2] Control device (1) according to claim 1, wherein the transmission control unit (12) measures a voltage value of a power supplied by the battery at a predetermined time interval in order to update the voltage value as a current value, the control device (1) further comprises an ignition switch (13) which receives an instruction from a driver of the vehicle to supply power from the battery to the engine start unit (10), the engine control unit (11) and the transmission control unit (12), and The transmission control unit (12) stops updating the voltage value until a predetermined first update waiting time has elapsed since a supply of power from the battery started. [3] Control device (1) according to claim 2, wherein the ignition switch (13) further receives an instruction to start the machine from the driver, the machine control unit (11) sends a start instruction signal to the transmission control unit (12), while the ignition switch (13) receives the start instruction, and While the transmission control unit (12) receives the start instruction signal, the transmission control unit (12) sets a voltage value obtained by subtracting a predetermined reference voltage threshold from the voltage value before the update as the voltage value after the update in a case where a measured value of the voltage value after the update is lower than the voltage value before the update by the reference voltage threshold or more. [4] Control device (1) according to claim 3, wherein the transmission control unit (12) stops updating the voltage value until a predetermined second update waiting time has elapsed since the reception of the start instruction signal has been completed.

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