JP6390302B2 - Program transmission system and program transmission apparatus - Google Patents

Description

  The present invention relates to a program transmission system and a program transmission device including a plurality of control devices that control in-vehicle devices based on a program, and a program transmission device that transmits another program to each of the plurality of control devices.

  Control systems using a plurality of control devices that perform control based on computer programs (hereinafter simply referred to as programs) are used in various fields. For example, in the field of vehicle control, a large number of ECUs (Electronic Control Units) are arranged as control devices in a vehicle, and each ECU transmits and receives information via an in-vehicle LAN, and performs various processes in cooperation and cooperation. It is configured as follows.

  When the function of the control device is added or changed, or when the problem of the program is to be resolved, there is a case where the program executed by the processor of the control device needs to be updated. As a program update method, an update program received by a specific control device from the outside by wired or wireless communication can be updated using existing communication means for exchanging data between the control devices. A method of transmitting a program to the control device and causing the control device that has received this to update the program is common.

  For example, in Patent Document 1, when ignition is on, rewrite information is captured via wireless communication or a storage medium, and a control device that is a target of program rewrite is specified. A rewriting system is described that rewrites a program by supplying main power only to the apparatus. By such a rewriting method, power consumption of the in-vehicle battery is suppressed.

JP 2010-167997 A

  However, according to the technique described in Patent Document 1, a switch for controlling on / off of the main power supply is required for each control device to be rewritten, which complicates the power supply system and increases the number of components. There was a problem of inviting.

  The present invention has been made in view of such circumstances, and the object of the present invention is to supply power to only some control devices including the control device to be rewritten and execute rewriting. An object of the present invention is to provide a program transmission system and a program transmission apparatus that can reduce the power consumption of a battery during rewriting.

In the program transmission system according to the present invention, power is supplied via any one of N switches (N is an integer of 2 or more) in a vehicle, and M (M is An integer greater than N), a power control device for controlling each of the N switches, and the M control devices and the power control device. In a program transmission system including a program transmission device that transmits another program to each of the program transmission devices, the program transmission device is directly supplied with power from a vehicle-mounted battery, and has a communication unit for communicating with the outside. When the communication unit is configured to receive the other program and the communication unit transmits the other program to the one control device, the power is sent to the one control device. The Yes and the switch supplies to control on by the power control unit, another control device to which power is supplied there by controlling to turn on the switch for supplying power to the one control device, When the other control device can shift to a low power consumption mode that reduces power consumption, the other control device is shifted to the low power consumption mode, and the M control devices Each of them is characterized in that it receives another program transmitted by the program transmitting apparatus and updates the program.

In the program transmission system according to the present invention, power is supplied via any one of N switches (N is an integer of 2 or more) in a vehicle, and M (M is An integer greater than N) and a program transmission system that is communicably connected to the M control devices and transmits another program to each of the M control devices. The program transmission device is directly supplied with power from an in-vehicle battery, and includes a switch control unit for controlling the N switches separately and a communication unit for communicating with the outside. The other program is received, and when the other program is transmitted to one control device by the communication unit, a power supply is supplied to the one control device. Pitch The Yes so as to control to turn on by the switch control unit, the other control device to which power is supplied there by controlling to turn on the switch for supplying power to the one control device, and the When the other control device can shift to the low power consumption mode in which the power consumption is reduced, the other control device is shifted to the low power consumption mode, and each of the M control devices is The program transmitting apparatus receives another program transmitted from the program transmitting apparatus and updates the program.

  In the program transmission system according to the present invention, the program transmission device transmits the other program in a time division manner to each of two or more control devices to which power is supplied via one switch. Features.

  In the program transmission system according to the present invention, the N switches include one or more accessory relays and one or more ignition relays.

The program transmission device according to the present invention is supplied with power via any one of N switches (N is an integer of 2 or more) controlled individually by a power supply control device in a vehicle, and is mounted on the vehicle based on the program. In a program transmission device that transmits another program to each of M (M is an integer greater than N) control devices that control devices, a communication unit that is directly supplied with power from a vehicle-mounted battery and communicates with the outside A switch for supplying power to the one control device when the communication unit transmits the other program to the one control device. wherein Ri Citea to control to turn on the power supply control device, other power is supplied by controlling to turn on the switch for supplying power to the one control device There control apparatus, and when said other control unit is capable of transition to the low power consumption mode to reduce power consumption, Ru Citea the other control device so as to shift in the low power consumption mode It is characterized by that.

The program transmission apparatus according to the present invention is supplied with power via any of N switches (N is an integer of 2 or more) in a vehicle, and controls M in-vehicle devices based on a program (M is In a program transmission device that transmits another program to each of the control devices (an integer greater than N), power is directly supplied from the vehicle battery, and a switch control unit that individually controls the N switches, A communication unit for communicating, the communication unit receives the other program, and the communication unit transmits the other program to the one control device. depending on Ri Citea to control on by the switch control unit switches to supply power to control to turn on the switch for supplying power to the one control device that the When there is another control device to which power is supplied and the other control device can shift to a low power consumption mode in which power consumption is reduced, the other control device is put into the low power consumption mode. characterized Citea Rukoto such shifts.

In the present invention, when the program transmitting device transmits another program, the program transmitting device communicates with the power control device and controls to turn on a switch that supplies power to the control device to be rewritten. One control device to be rewritten updates the program with another program received from the program transmission device. Accordingly, only one switch among N switches (N is a natural number less than M) that supplies power to the M control devices is controlled to be turned on. In the present invention, the program transmission device transmits another program received from the outside by the communication unit to the control device. Thereby, the program of each control apparatus is updated in the environment where a vehicle can communicate with the exterior.

In the present invention, when the program transmission device transmits another program, the switch that supplies power to the control device to be rewritten is controlled to be turned on by the switch control unit. One control device to be rewritten updates the program with another program received from the program transmission device. Accordingly, only one switch among N switches (N is a natural number less than M) that supplies power to the M control devices is controlled to be turned on. In the present invention, the program transmission device transmits another program received from the outside by the communication unit to the control device. Thereby, the program of each control apparatus is updated in the environment where a vehicle can communicate with the exterior.

In the present invention, another program is transmitted in a time-sharing manner to two or more control devices to which power is simultaneously supplied by controlling one switch to be on.
As a result, the total time required for rewriting the programs of two or more control devices to which power is supplied via the one switch is reduced.

In the present invention, one or a plurality of accessory relays and ignition relays are included in the N switches.
As a result, power is supplied to some or all of the control devices by controlling any of the existing accessory relays and ignition relays to be on.

According to the present invention, when the program transmission device transmits another program to the control device to be rewritten, among the N switches (N is a natural number less than M) that supplies power to the M control devices. Only one switch is controlled to be on.
Therefore, it is possible to reduce the power consumption of the battery at the time of rewriting by supplying power to only some control devices including the control device to be rewritten and executing rewriting.

It is a block diagram which shows the structural example of the program transmission system which concerns on Embodiment 1 of this invention. It is a flowchart which shows the process sequence of CPU which transmits the program for rewriting with the program rewriting apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structural example of the program transmission system which concerns on Embodiment 2 of this invention. It is a flowchart which shows the process sequence of CPU which transmits the program for rewriting with the program rewriting apparatus which concerns on Embodiment 2 of this invention. It is a flowchart which shows the process sequence of CPU which transmits the program for rewriting with the program rewriting apparatus which concerns on Embodiment 3 of this invention.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is a block diagram showing a configuration example of a program transmission system according to Embodiment 1 of the present invention. The program transmission system includes five ECUs (corresponding to control devices) 11, 12, 13, 14, 15 for controlling in-vehicle devices (not shown) and accessory relays (hereinafter referred to as relay boxes 2 for power distribution). , An ACC relay) 23 and an ignition relay (hereinafter referred to as an IG relay) 24, a power control ECU (corresponding to a power control device) 3 for controlling the ACC relay 23 and the IG relay 24, and ECUs 11, 12, 13 , 14, and 15, a program rewriting device (corresponding to a program transmitting device) 4 a for transmitting a rewriting program (corresponding to another program).

  The program rewriting device 4 a, the ECUs 11, 12, 13, 14, 15 and the power supply control ECU 3 are communicably connected via the in-vehicle LAN 5. Note that the program rewriting device 4a may be realized by, for example, a gateway ECU (not shown) that relays communication between a plurality of in-vehicle LANs. The power supply control ECU 3 is a so-called body ECU or BCM (Body Control Module), but may be included in the relay box 2.

  The ECUs 11, 12, 13, 14, and 15 are communication ICs 111, 121, 131, 141, and 151, and programs 113, 123, 133, and the like for performing communication conforming to CAN (Controller Area Network) via the in-vehicle LAN 5. And non-volatile memories 112, 122, 132, 142, 152 for storing 143, 153, respectively. The communication method via the in-vehicle LAN 5 is not limited to CAN, and may be another communication method such as LIN (Local Interconnect Network). The number of ECUs 11, 12, 13, 14, and 15 is not limited to five.

  In the relay box 2, a battery power line 20 is directly connected to a power line from an in-vehicle battery. One end of the relay contact 231 of the ACC relay 23 and one end of the relay contact 241 of the IG relay 24 are connected to the battery power line 20. The other end of each of the relay contacts 231 and 241 is connected to a power supply line 21 of an accessory system (hereinafter referred to as ACC system) and a power supply line 22 of an ignition system (hereinafter referred to as IG system). That is, the power supply system to which the ECUs 11, 12, 13, 14, and 15 belong is separated into a battery system, an ACC system, and an IG system.

The battery power line 20 is used to supply power to the ECU 11, the power control ECU 3, and the program rewriting device 4a. Therefore, power is always supplied to the ECU 11, the power supply control ECU 3, and the program rewriting device 4a.
The ACC power line 21 and the IG power line 22 are used to supply power to the ECUs 12 and 13 and the ECUs 14 and 15, respectively. That is, when the ACC relay 23 (or IG relay 24) is controlled to be on, power is supplied to the ECUs 12 and 13 (or ECUs 14 and 15).

  The ACC relay 23 (or IG relay 24) may be separated into a plurality of relays such as an ACC1 relay and an ACC2 relay (or IG1 relay and IG2 relay). However, the number of all ACCj relays and IGk relays (j and k are integers of 1 or more) (corresponding to N) is less than the number of ECUs (corresponding to M) belonging to the ACC and IG power supply systems. is there.

  When the ACC relay 23 is separated into the ACC1 relay and the ACC2 relay, power is separately supplied to the ECU 12 and the ECU 13 via either the ACC1 relay or the ACC2 relay. Similarly, when the IG relay 24 is separated into an IG1 relay and an IG2 relay, power is separately supplied to the ECU 14 and the ECU 15 via either the IG1 relay or the IG2 relay.

  The power supply control ECU 3 has a CPU 31, which includes a ROM 32 that stores information such as its own control program, a RAM 33 that stores temporarily generated information, a communication IC 34 for performing CAN communication via the in-vehicle LAN 5, and The relay drive unit 35 that drives the relays 23 and 24 is connected to the bus. The relay drive unit 35 is connected to the relay coils 232 and 242 of the relays 23 and 24, respectively, and excites the relay coils 232 and 242 to drive the relays 23 and 24 on.

  The program rewriting device 4a has a CPU 41. The CPU 41 stores a ROM 42 for storing information such as its own control program, a RAM 43 for storing temporarily generated information, and a communication IC 44 for performing CAN communication via the in-vehicle LAN 5. And a receiving unit (corresponding to a communication unit) 45 for receiving a rewriting program from the external program management server 6 via a bus.

  The communication method between the reception unit 45 and the program management server 6 may be wireless such as a mobile phone or Wi-Fi (registered trademark), or may be wired such as Ethernet (registered trademark). Also good. In the case of wired communication, it may be connected to an optical disk drive instead of the program management server 6 and a rewriting program may be read from an optical disk such as a CD-ROM or DVD. Furthermore, a rewriting program may be read from a recording medium such as a USB memory via an interface such as a USB instead of the receiving unit 45.

  In the configuration described above, the program rewriting device 4a receives a rewriting program from the program management server 6 prior to transmission of the rewriting program. Information for identifying the rewriting target ECU and information indicating the power supply system to which the target ECU belongs are added to the rewriting program received here. As an alternative to the latter information, information indicating the power supply system to which each of the ECUs 11, 12, 13, 14, and 15 belongs may be stored in the ROM 42 in advance. Based on such additional information and stored information, the program rewriting device 4a specifies the transmission destination of the rewriting program and the power supply system to which the transmission destination ECU belongs.

  When the program rewriting device 4a transmits a rewriting program to any of the ECUs 12, 13, 14, and 15, power is supplied to the power supply system (battery system, ACC system, or IG system) to which the ECU to be rewritten belongs. Like that. Specifically, for example, when the ECU to be rewritten is the ECU 12 or 13 (or ECU 14 or 15), the program rewriting device 4a communicates with the power control ECU 3 to control the ACC relay 23 (or IG relay 24) to be turned on. To be. The ECU 11 is always supplied with power, and such control is unnecessary.

  Communication between the program rewriting device 4a and the ECUs 11, 12, 13, 14, and 15 is executed by transmitting and receiving a plurality of frames (messages). Each frame has a header portion and a data portion, the header portion includes information for identifying the ECU, and the data portion includes data constituting a rewriting program. When the frame having such a configuration is transmitted to the in-vehicle LAN 5 by the program rewriting device 4a, only the ECU to be rewritten among the one or a plurality of ECUs belonging to the same power supply system receives the rewriting program.

Below, operation | movement of the program rewriting apparatus 4a mentioned above is demonstrated using the flowchart which shows it. The following processing is executed by the CPU 41 according to a control program stored in advance in the ROM 42.
FIG. 2 is a flowchart showing a processing procedure of the CPU 41 that transmits a rewriting program by the program rewriting device 4a according to the first embodiment of the present invention. The processing in FIG. 2 is appropriately started when, for example, the ACC relay 23 and the IG relay 24 are controlled to be turned off, that is, when the accessory power source and the ignition power source are off.

  When the process of FIG. 2 is activated, the CPU 41 determines whether or not a rewriting program has been received from the program management server 6 (S11). If not received (S11: NO), the CPU 41 waits until it is received. To do. The received program is stored in the RAM 43. When the rewriting program is received (S11: YES), the CPU 41 specifies the ECU to be rewritten by the additional information for identifying the ECU (S12), and further by the additional information indicating the power system to which the target ECU belongs. Then, it is determined whether or not the target ECU (power supply system to which the target ECU belongs) is an ACC system (S13).

  When the ECU is an ACC-type ECU (S13: YES), the CPU 41 transmits an ON request for the ACC relay 23 to the power supply control ECU 3 (S14). The power supply control ECU 3 that has received this ON request controls the ACC relay 23 to be ON in response to the request. As a result, power is supplied to one or a plurality of ECUs including the ECU to be rewritten. Here, when the ECU that is not the rewriting target is the ECU that can shift to the low power consumption mode such as the sleep mode, the CPU 41 preferably sets the ECU that is not the rewriting target to the low power consumption mode.

  On the other hand, when the target ECU is not an ACC system (S13: NO), the CPU 41 determines whether or not the target ECU is an IG system ECU (S15). If the ECU is an IG ECU (S15: YES), the CPU 41 transmits an ON request for the IG relay 24 to the power supply control ECU 3 (S16). The power supply control ECU 3 that has received this ON request controls the IG relay 24 to turn ON in response to the request. As a result, power is supplied to one or a plurality of ECUs including the ECU to be rewritten. Also in this case, it is preferable that the CPU 41 sets an ECU that is not a target for rewriting to the low power consumption mode if possible.

  When the process of step S14 or S16 is completed, or when the target ECU is not an IG system in step S15 (S15: NO), the CPU 41 stores a plurality of rewrite programs on the rewrite target ECU specified in step S12. The data is divided into frames and transmitted (S17). In this case, as described above, the header portion of each frame to be transmitted includes information for identifying the target ECU. Hereinafter, a case where the target ECU is the ECU 11 (or the ECU 12, 13, 14, or 15) will be described as an example.

  The ECU 11 (or ECU 12, 13, 14 or 15) receives a rewriting program comprising a frame in which information for identifying itself is included in the header portion. In this case, the ECU 11 (or the ECU 12, 13, 14 or 15) may store the rewrite program data included in the received frame in a temporary storage memory (not shown) or the non-volatile memory 112 ( Alternatively, it may be stored in a temporary storage area secured in advance in the memory 122, 132, 142, or 152).

  The program is updated by overwriting the entire program for rewriting stored in the temporary storage memory on the program 113 (or programs 123, 133, 143, or 153), or the nonvolatile memory 112 (or memories 122, 132, 142 or 152) by switching the original program 113 (or programs 123, 133, 143, or 153) and the rewriting program stored in the temporary storage area (so-called surface switching).

  Thereafter, the CPU 41 captures the processing state in the ECU 11 (or ECU 12, 13, 14 or 15) by communication, determines whether or not the program update is completed (S18), and if not completed (S18: NO) ), Wait for completion. When the program update is completed (S18: YES), the CPU 41 transmits a request for turning off the ACC relay 23 and the IG relay 24 to the power supply control ECU 3 regardless of the power supply system to which the target ECU belongs (S19). The process of 2 is finished. Receiving this, the power supply control ECU 3 controls the ACC relay 23 and the IG relay 24 to be turned off in response to the request.

  In the flowchart shown in FIG. 2, it is assumed that the rewriting program is transmitted to the target ECU every time a rewriting program for one ECU is received. However, the present invention is not limited to this. For example, in step S11, all the update target ECU rewrite programs may be received first and stored in the RAM 43, and then the rewrite program may be sequentially transmitted to all target ECUs.

  If the rewriting program for all the ECUs to be updated is received first in step S11, the program is received when the engine (not shown) is rotating and generating power in order to suppress the power consumption of the in-vehicle battery. It is preferable to do. In this case, in order to prevent the occurrence of troubles associated with the rewriting of the program, after the reception of all the programs is completed, the engine is stopped and the ACC relay 23 and the IG relay 24 are controlled to be turned off. This process is repeated for the number of target ECUs.

As described above, according to the first embodiment, when the program rewriting device 4a transmits a rewriting program, the ACC relay 23 that communicates with the power control ECU 3 to supply power to the ECU to be rewritten, or The IG relay 24 is turned on. One of the ECUs to be rewritten updates the program stored in the non-volatile memory with the rewriting program received from the program rewriting device 4a.
As a result, only one of the two switches that supply power to the ECUs 12, 13, 14, and 15 is controlled to be on.
Therefore, it is possible to reduce the power consumption of the in-vehicle battery at the time of rewriting by supplying power to only some ECUs including the ECU to be rewritten and executing rewriting.

Further, according to the first embodiment, the ACC relay 23 (or ACC1 relay, ACC2 relay) and the IG relay 24 (or IG1 relay, IG2 relay) are relays for supplying power to the ECUs 12, 13 and ECUs 14, 15 respectively. ) Is included.
Therefore, it is possible to supply power to the ECUs 12 and 13 and the ECUs 14 and 15 by controlling the existing ACC relay 23 and IG relay 24 to be on. Moreover, when the ACC relay 23 (or IG relay 24) is separated into the ACC1 relay and the ACC2 relay (or IG1 relay and IG2 relay), one of the ACC1 relay and ACC2 relay (or IG1 relay and IG2 relay) By controlling to ON, it is possible to reduce the rate at which power is unnecessarily supplied to ECUs that are not to be rewritten.

(Embodiment 2)
The first embodiment is a form in which the program rewriting device 4a and the power supply control ECU 3 are separated, while the second embodiment is a form in which the program rewriting device and the power supply control ECU are integrated.
FIG. 3 is a block diagram showing a configuration example of a program transmission system according to Embodiment 2 of the present invention. The program transmission system includes five ECUs 11, 12, 13, 14, 15, an ACC relay 23 and an IG relay 24 arranged in the relay box 2, and controls the ACC relay 23 and the IG relay 24 separately from the ECU 11, And a program rewriting device (corresponding to a program transmission device) 4b for transmitting a rewriting program to 12, 13, 14, and 15, respectively. The program rewriting device 4 b and the ECUs 11, 12, 13, 14, 15 are connected via the in-vehicle LAN 5 so that they can communicate with each other.

  The program rewriting device 4b has a CPU 41. The CPU 41 stores a ROM 42 for storing information such as its own control program, a RAM 43 for storing temporarily generated information, and a communication IC 44 for performing CAN communication via the in-vehicle LAN 5. A bus 45 is connected to a receiving unit 45 for receiving a rewriting program from the external program management server 6 and a relay driving unit (corresponding to a switch control unit) 35 for driving the relays 23 and 24.

  In addition, the same code | symbol is attached | subjected to the location corresponding to Embodiment 1, and the description is abbreviate | omitted.

  In the above configuration, when the program rewriting device 4b transmits a rewriting program to any of the ECUs 12, 13, 14, and 15, power is supplied to the ECU to be rewritten. Specifically, for example, when the ECU to be rewritten is the ECU 12 or 13 (or the ECU 14 or 15), the program rewriting device 4b controls the ACC relay 23 (or the IG relay 24) to be turned on using the relay driving unit 35. To do.

Below, operation | movement of the program rewriting apparatus 4b mentioned above is demonstrated using the flowchart which shows it.
FIG. 4 is a flowchart showing a processing procedure of the CPU 41 that transmits a rewriting program by the program rewriting device 4b according to the second embodiment of the present invention. The process of FIG. 4 is appropriately started when the ACC relay 23 and the IG relay 24 are controlled to be off, for example.

  Since the processing of steps S21 to S29 shown in FIG. 4 is the same as the processing of steps S11 to S19 shown in FIG. 2 except for steps S24, S26, and S29, most of the description thereof is omitted.

  When the process of FIG. 4 is started and the processes of steps S21 to S23 are executed and it is determined that the ECU to be rewritten is an ACC-type ECU (S23: YES), the CPU 41 causes the relay drive unit 35 to perform the ACC. The relay 23 is controlled to be turned on (S24). On the other hand, when it is determined that the ECU to be rewritten is an IG-type ECU (S25: YES), the CPU 41 controls the IG relay 24 to be turned on by the relay drive unit 35 (S26).

  Thereafter, when the update of the program in the ECU to be rewritten is completed (S28: YES), the CPU 41 controls the ACC relay 23 and the IG relay 24 to be turned off by the relay drive unit 35 (S29), and ends the process of FIG. To do.

As described above, according to the second embodiment, when the program rewriting device 4b transmits a rewriting program, the ACC relay 23 or the IG relay 24 that supplies power to the ECU to be rewritten is connected to the relay driving unit 35. To turn on. One ECU to be rewritten updates the program stored in the non-volatile memory with the rewriting program received from the program rewriting device 4b.
As a result, only one of the two switches that supply power to the ECUs 12, 13, 14, and 15 is controlled to be on. Therefore, it is possible to reduce the power consumption of the in-vehicle battery at the time of rewriting by supplying power to only some ECUs including the ECU to be rewritten and executing rewriting.

Further, according to the first or second embodiment, the program rewriting device 4a or 4b transmits the rewriting program received from the outside by the receiving unit 45 to the ECU 11 (or the ECU 12, 13, 14 or 15).
Accordingly, it is possible to update the program of the ECU 11 (or the ECUs 12, 13, 14, 15) in an environment where the vehicle can communicate with the outside.

(Embodiment 3)
The first embodiment is a form in which the program is not rewritten simultaneously for two or more ECUs, whereas the third embodiment is a form in which the programs are rewritten in a time division manner for two or more ECUs. It is.
Since the configuration of the program transmission system in the third embodiment is the same as that shown in FIG. 1 of the first embodiment, the portions corresponding to those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted. .

  In the third embodiment, if there are two or more ECUs belonging to the ACC or IG power supply system among the ECUs to be rewritten, the program for rewriting is time-divisionally assigned to the two or more ECUs. Send to. As a result, in the two or more ECUs, at least the program update process excluding the program reception process is executed in parallel, so the energization time required for rewriting the program is shortened.

Below, it demonstrates in detail using a flowchart.
FIG. 5 is a flowchart showing a processing procedure of the CPU 41 that transmits a rewriting program by the program rewriting device 4a according to the third embodiment of the present invention. The process of FIG. 5 is started as appropriate when, for example, an engine (not shown) is rotating (that is, when an in-vehicle battery (not shown) is charged).

  When the process of FIG. 5 is started, the CPU 41 determines whether or not all rewrite programs have been received from the program management server 6 (S31). If not received (S31: NO), the reception is performed. Wait until During this time, the received rewriting program is stored in the RAM 43 for each ECU to be rewritten. When all the programs for rewriting are received (S31: YES), the CPU 41 determines whether the engine is stopped and the ACC relay 23 and the IG relay 24 are turned off (S32). (S32: NO), waiting until both relays are turned off.

  When the ACC relay 23 and the IG relay 24 are turned off (S32: YES), the CPU 41 identifies all the ECUs to be rewritten by additional information for identifying the ECU (S33), and the ACC relay ACC is informed to the ECU to be rewritten. It is determined whether or not there is a system ECU (S34). When there is no ACC-type ECU (S34: NO), the CPU 41 shifts the processing to step S39 described later.

  When the ECU to be rewritten includes an ACC-type ECU (S34: YES), the CPU 41 transmits an ON request for the ACC relay 23 to the power supply control ECU 3 (S35). Receiving this, the power supply control ECU 3 controls the ACC relay 23 to be turned on in response to the request. Next, the CPU 41 divides the rewriting program into a plurality of frames and transmits it in a time-sharing manner to all the ACC-type ECUs among the rewriting target ECUs identified in step S33 (S36). Specifically, for example, the program is sequentially transmitted to the target ECU frame by frame. When there is one ACC ECU to be rewritten, frames are continuously transmitted to the one ECU.

  Thereafter, the CPU 41 sequentially captures the processing state in the target ACC-type ECU through communication, determines whether or not all the program updates have been completed (S37), and if not completed (S37: NO), completes. Wait until When all the program updates have been completed (S37: YES), the CPU 41 transmits a request to turn off the ACC relay 23 to the power supply control ECU 3 (S38). Receiving this, the power supply control ECU 3 controls the ACC relay 23 to be turned off in response to the request.

  Next, the CPU 41 determines whether or not there is an IG-type ECU in the rewriting target ECU identified in step S33 (S39). When there is no IG type ECU (S39: NO), the CPU 41 shifts the processing to step S44 described later. On the other hand, when the ECU to be rewritten includes an IG-type ECU (S39: YES), the CPU 41 transmits an ON request for the IG relay 24 to the power supply control ECU 3 (S40). Receiving this, the power supply control ECU 3 controls the IG relay 24 to be turned on in response to the request.

  Next, the CPU 41 divides the rewriting program into a plurality of frames and transmits it in a time-sharing manner to all the IG ECUs among the rewriting target ECUs identified in step S33 (S41). When there is one IG ECU to be rewritten, frames are continuously transmitted to that one ECU.

  Thereafter, the CPU 41 sequentially captures the processing state in the target IG ECU through communication and determines whether or not all the program updates have been completed (S42). If not completed (S42: NO), the processing is completed. Wait until When all the program updates are completed (S42: YES), the CPU 41 transmits a request to turn off the IG relay 24 to the power supply control ECU 3 (S43). Receiving this, the power supply control ECU 3 controls the IG relay 24 to be turned off in response to the request.

  Next, the CPU 41 determines whether or not the rewriting target ECU identified in step S33 includes a battery ECU (S44). When there is no battery ECU (S44: NO), the CPU 41 ends the process of FIG. On the other hand, when there is a battery-type ECU in the ECU to be rewritten (S44: YES), the CPU 41 sets a program for rewriting a plurality of frames for all the battery-type ECUs among the ECUs to be rewritten specified in step S33. And is transmitted in a time-sharing manner (S45).

  Thereafter, the CPU 41 sequentially captures the processing state in the target battery system ECU by communication, determines whether or not the program update has been completed (S46), and if not completed (S46: NO), completes. Wait until When all the program updates are completed (S46: YES), the CPU 41 ends the process of FIG.

As described above, according to the third embodiment, when there are two or more ECUs belonging to the ACC (or IG) power supply system among the ECUs to be rewritten, that is, the ACC relay 23 (or IG relay 24). Is turned on, a rewriting program is transmitted in a time-sharing manner to two or more ECUs to which power is simultaneously supplied.
Therefore, it is possible to reduce the total time required for rewriting the programs of two or more ECUs to which power is supplied via the ACC relay 23 (or IG relay 24).

  The embodiment disclosed this time is to be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the meanings described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. In addition, the technical features described in each embodiment can be combined with each other.

11, 12, 13, 14, 15 ECU
112, 122, 132, 142, 152 Non-volatile memory 113, 123, 133, 143, 153 Program 2 Relay box 20, 21, 22 Power line 23 ACC relay 24 IG relay 3 Power control ECU
35 Relay drive unit 4a, 4b Program rewriting device 41 CPU
45 Receiver 5 In-vehicle LAN
6 Program management server

Claims (6)

Power is supplied via any of N switches (N is an integer equal to or greater than 2) in the vehicle, and M (M is an integer greater than N) control devices that control on-vehicle equipment based on a program; , A power control device that controls the N switches separately, and a program that is communicably connected to the M control devices and the power control device, and transmits another program to each of the M control devices. In a program transmission system comprising a transmission device,
The program transmission device includes:
Power is supplied directly from the vehicle battery,
A communication unit for communicating with the outside;
The communication unit is adapted to receive the other program,
When transmitting the other program to one control device by the communication unit, a switch for supplying power to the one control device is controlled to be turned on by the power control device,
There is another control device to which power is supplied by turning on a switch that supplies power to the one control device, and the transition to the low power consumption mode in which the other control device reduces power consumption Is possible to shift the other control device to the low power consumption mode,
Each of the M control devices receives another program transmitted by the program transmission device and updates the program. Power is supplied via any of N switches (N is an integer equal to or greater than 2) in the vehicle, and M (M is an integer greater than N) control devices that control on-vehicle equipment based on a program; A program transmission system that is communicably connected to the M control devices and includes a program transmission device that transmits another program to each of the M control devices.
The program transmission device includes:
Power is supplied directly from the vehicle battery,
A switch controller for controlling the N switches separately;
A communication unit for communicating with the outside,
The communication unit is adapted to receive the other program,
When transmitting the other program to one control device by the communication unit, the switch control unit turns on a switch for supplying power to the one control device,
There is another control device to which power is supplied by turning on a switch that supplies power to the one control device, and the transition to the low power consumption mode in which the other control device reduces power consumption Is possible to shift the other control device to the low power consumption mode,
Each of the M control devices receives another program transmitted by the program transmission device and updates the program.   3. The program transmission device according to claim 1, wherein the other program is transmitted in a time-sharing manner to each of two or more control devices to which power is supplied through one switch. The program transmission system described.   4. The program transmission system according to claim 1, wherein the N switches include one or more accessory relays and one or more ignition relays. 5. Power is supplied via any one of N switches (N is an integer of 2 or more) controlled individually by a power supply control device in the vehicle, and M (M is In a program transmission device that transmits another program to each of the control devices (integer greater than N),
Power is supplied directly from the vehicle battery,
A communication unit for communicating with the outside;
The communication unit is adapted to receive the other program,
When sending the other program by the communication unit to the one control device, Ri Citea a switch for supplying power to the one control device to control on by the power supply controller,
There is another control device to which power is supplied by turning on a switch that supplies power to the one control device, and the transition to the low power consumption mode in which the other control device reduces power consumption If possible, the program transmission apparatus according to claim Citea Rukoto so as to migrate the other control unit in the low power consumption mode. Power is supplied via any one of N switches (N is an integer equal to or greater than 2) in the vehicle, and M (M is an integer greater than N) control devices that control in-vehicle devices based on a program. In a program transmission device for transmitting other programs to
Power is supplied directly from the vehicle battery,
A switch controller for controlling the N switches separately;
A communication unit for communicating with the outside,
The communication unit is adapted to receive the other program,
When sending the other program by the communication unit to the one control device, Ri Citea a switch for supplying power to the one control device to control ON by said switch control unit,
There is another control device to which power is supplied by turning on a switch that supplies power to the one control device, and the transition to the low power consumption mode in which the other control device reduces power consumption If possible, the program transmission apparatus according to claim Citea Rukoto so as to migrate the other control unit in the low power consumption mode.

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