JP2013199180A - On-vehicle control device - Google Patents

Abstract

A vehicle-mounted control device is provided that can reduce the power consumption by changing the operating states of a plurality of processing units and increase the processing capability in response to a processing request.
Whether or not to increase the number of processing units that perform control processing for an in-vehicle device based on a processing request for the in-vehicle device in an ECU that performs control processing of the in-vehicle device by a processing circuit unit including a plurality of processing units Is determined (S3). When the IG switch is on, all the processing units of the processing circuit unit are changed to the operating state (S4), and when the IG switch is off, some processing units of the processing circuit unit are operating. The remaining processing unit of the processing circuit unit is changed to a non-operating state (S6). Further, when the IG switch is in the off state and it is determined that the number of processing units that perform the control process is increased, the number of processing units that are in the operating state is increased (S4).
[Selection] Figure 5

Description

  The present invention relates to an in-vehicle control device that performs control processing for a plurality of controlled devices.

  In recent years, in the field of automobiles, higher functions of vehicles have been increasingly advanced, and a wide variety of devices are mounted on vehicles, and a large number of so-called ECUs (Electronic Control Units) for controlling these on-vehicle devices are mounted. Has been. For example, a body ECU that controls the opening / closing of a door, locking / unlocking of a door lock, turning on / off of a headlight, turning on / off of a wiper, and intermittent driving according to a user's switch operation, etc. The vehicle includes various ECUs such as an engine control ECU that performs the above, a meter system ECU that controls the operation of meters disposed near the driver's seat, and a navigation ECU that controls the car navigation system.

  The ECU is configured by an arithmetic processing unit such as a microcomputer, and various controls of the in-vehicle devices are realized by reading and executing a control program. In recent years, microcomputers with high processing capabilities tend to be used to enhance the functionality of vehicles, and in particular, research on technology that has multiple processing units called multi-cores and applies parallel control processing to vehicles. Development is actively underway.

  In general, a microcomputer with high processing capacity consumes a large amount of power, and therefore a heavy load is imposed on a limited power source battery. In particular, when the vehicle ignition switch (hereinafter referred to as IG switch) is in the off position or accessory position and the engine is not operating, battery power is not regenerated. It needs to be in a state to ensure.

  For example, Patent Document 1 discloses an ECU for engine control including a plurality of processing units that perform control processing. In the engine control ECU, during engine control, an engine control mode in which a plurality of CPU cores (processing units) are all used and the maximum processing capacity can be exhibited is selected. On the other hand, when the IG switch is in the OFF position, only a single CPU core is operated, and a plurality of CPU cores are operated when the IG switch is changed to the accessory position for rewriting the control program. . The engine control ECU disclosed in Patent Document 1 is able to effectively reduce power consumption by changing the number of CPU cores to be operated according to the position of the IG switch.

JP 2008-269487 A

  However, in the ECU described in Patent Document 1, when the operation is performed by a single processing unit, the number of processing units to be operated is increased even if the control processing to be executed is added to increase the processing load. I can't. For this reason, for example, when a control process with a large number of processes occurs, such as a periodic self-diagnosis process, an input / output process with an in-vehicle device or the like connected to the ECU, a comparison calculation process in the processing unit Etc., and the processing time becomes long with only a single processing unit.

  In addition, in an ECU in which the number of in-vehicle devices connected as in the body system ECU is larger than in other ECUs, information on the in-vehicle devices connected in response to processing requests from other ECUs is acquired and notified. There is a possibility that a large number of processes are generated, and there is a problem that the process cannot be performed in time with only a single processing unit.

  The present invention has been made in view of such circumstances, and an object of the present invention is to reduce the power consumption by changing the operation state of a plurality of processing units and to increase the processing capacity in response to a processing request. It is providing the vehicle-mounted control apparatus which can be performed.

  The in-vehicle control device according to the present invention is an in-vehicle control device that performs control processing for a plurality of controlled devices mounted on a vehicle by a plurality of processing units, an acquisition unit that acquires an on / off state of an ignition switch, A request receiving unit that receives a processing request for the controlled device, and a determination unit that determines whether or not to increase the number of processing units that perform control processing for the controlled device based on the processing request received by the request receiving unit. And when the acquisition unit acquires an on state, changes all of the plurality of processing units to an operating state, and when the acquisition unit acquires an off state, operates a part of the plurality of processing units. And changing the rest of the plurality of processing units to the non-operating state, the acquisition unit acquires an off state, and the determination unit increases the number of processing units that perform control processing. Wherein further comprising an operation changing means of increasing the number of processing units and operating state when it is determined that cause.

  In the present invention, the in-vehicle control device performs control processing for a plurality of controlled devices mounted on a vehicle by a plurality of processing units. The acquisition unit acquires the on / off state of the ignition switch, and the determination unit determines whether to increase the number of processing units that perform control processing for the controlled device based on the processing request for the controlled device. To do. The operation changing unit changes all of the plurality of processing units to the operating state when the acquiring unit acquires the on state, and when the acquiring unit acquires the off state, some of the plurality of processing units are in the operating state. And changing the remaining portions of the plurality of processing units to the non-operating state. In addition, the operation changing unit increases the number of processing units that are in the operating state when the acquiring unit acquires the off state and the determination unit determines to increase the number of processing units that perform control processing. As a result, from the operation mode in which the ignition switch is in an off state, a part of the plurality of processing units is set in the operating state, and the remaining part is set in the non-operating state to reduce power consumption, Can be changed to increase the processing capacity.

  The in-vehicle control device according to the present invention includes a counting unit that counts the number of processes based on the processing request received by the request receiving unit, and the determination unit has a processing number counted by the counting unit equal to or greater than a predetermined value. In this case, it is determined that the number of processing units that perform control processing is increased.

  In the present invention, the counting unit counts the number of processes based on the processing request, and the determining unit counts the number of processing units that perform control processing when the number of processes counted by the counting unit is equal to or greater than a predetermined value. Is determined to increase. The number of processes based on the processing request can be reliably counted by the counting means, and the number of processing units can be increased when the number of processes increases to a predetermined value or more.

  The in-vehicle control device according to the present invention includes a storage unit that stores a specific high load processing request, and the determination unit includes a specific high load in which the processing request received by the request reception unit is stored in the storage unit. In the case where it matches the processing request, it is determined that the number of processing units that perform control processing is increased.

  In the present invention, a specific high load processing request is stored in the storage unit, and the determination unit performs a process of performing a control process when the processing request matches a specific high load processing request stored in the storage unit. It is determined that the number of copies is increased. The high load processing request is, for example, a security process, an external failure diagnosis process, a self-diagnosis process, etc., and a process request for requesting a control process that is predicted to cause a high load on the input / output process. is there. The number of processing units can be increased in response to the fact that a high load processing request is accepted and high load processing is required.

  The in-vehicle control device according to the present invention is characterized in that the specific high load processing request is a processing request for requesting a plurality of processes for confirming whether or not the controlled device is operating in a predetermined order. To do.

  In the present invention, in response to a case where the specific high load processing request is a processing request for requesting a plurality of processes for confirming whether or not the controlled device is operating in a predetermined order, The number can be increased. For example, when security processing is being executed, a situation in which a plurality of processes for confirming whether a plurality of in-vehicle devices are operating correctly in a predetermined order is triggered by an input signal from one in-vehicle device Therefore, it is possible to cope with such processing by increasing the number of processing units.

  The in-vehicle control device according to the present invention is characterized in that the specific high load processing request is a processing request for requesting a plurality of processes for confirming whether or not a failure has occurred in the controlled device.

  In the present invention, the number of processing units is increased in response to a case where a specific high-load processing request is a processing request for requesting a plurality of processes for checking whether or not a failure occurs in the controlled device. Can be made. For example, in the external failure diagnosis process and the self-diagnosis process, it is planned on the diagnosis process sequence that a plurality of processes for confirming whether or not a plurality of in-vehicle devices have a failure will occur. Such processing can be dealt with by increasing the number of processing units.

  The in-vehicle control device according to the present invention includes: an output process for outputting a control signal to the controlled device based on a process request received by the request receiving unit; and the processing unit based on the process request before executing the output process. A process allocating unit that is classified into output pre-processing to be executed and assigned to the plurality of processing units is provided, and the plurality of processing units simultaneously perform pre-output processing and output processing.

  In the present invention, an output process for outputting a control signal to a controlled device by a process allocation unit, based on the process request, and an output pre-process executed by the processing unit based on the process request before the execution of the output process Are assigned to a plurality of processing units, and the plurality of processing units simultaneously perform pre-output processing and output processing. Thereby, a some processing part can advance a process simultaneously, and a processing capability can be improved.

  The in-vehicle control device according to the present invention is characterized in that the process allocating unit allocates processes to the plurality of processing units so that processing loads in the plurality of processing units are substantially equal for each output pre-processing and output process. And

  In the present invention, the process assigning means assigns processes to the plurality of processing units so that the processing loads in the plurality of processing units become substantially equal for each pre-output process and output process. Thereby, the processing waiting time in a some processing part can be reduced, and processing capacity can be improved.

  According to the present invention, the in-vehicle control device performs control processing for a plurality of controlled devices mounted on a vehicle by a plurality of processing units. The acquisition means acquires the on / off state of the ignition switch, and the determination means determines whether to increase the number of processing units that perform control processing for the controlled device based on a processing request for the controlled device. judge. When the acquisition unit acquires the on state, the operation change unit changes all of the plurality of processing units to the operation state, and when the acquisition unit acquires the off state, some of the plurality of processing units operate. The state is changed, and the rest of the plurality of processing units is changed to the non-operating state. In addition, the operation changing unit increases the number of processing units that are in the operating state when the acquiring unit acquires the off state and the determination unit determines to increase the number of processing units that perform control processing. For this reason, from the operation mode in which the ignition switch is in the off state, a part of the plurality of processing units is in the operating state, and the remaining part is in the non-operating state to reduce the power consumption, the number of processing units in accordance with the processing request to the controlled device Can be changed to increase the processing capacity.

It is a block diagram which shows the structure of the vehicle control apparatus which concerns on embodiment of this invention. It is a schematic diagram for demonstrating the operation mode of a processing circuit part. It is a schematic diagram for demonstrating the function by the software in a processing circuit part. It is a schematic diagram for demonstrating the processing function in an operation mode setting part. It is a flowchart which shows the procedure of the operation mode setting process of a processing circuit part. It is a chart which shows the table which described the kind of high load port data processing. It is a flowchart which shows the procedure of the allocation process by a process allocation part. It is a schematic diagram for demonstrating an example of a process allocation table. It is a chart which shows the correspondence of port processing number N and processing part use number.

(Embodiment 1)
Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. FIG. 1 is a block diagram showing a configuration of a vehicle control device 1 (hereinafter referred to as “ECU1”) according to an embodiment of the present invention. The ECU 1 is a control device that controls, for example, a body-based in-vehicle device (controlled device), and controls in-vehicle devices such as a headlight 80, a turn hazard 81, a wiper 82, and a door lock mechanism 83 mounted on the vehicle. That is, the ECU 1 receives a user operation, controls the turning on / off of the headlight 80 and the turn hazard 81, the on / off or intermittent operation of the wiper 82, and the locking / unlocking of the door lock mechanism 83. To do.

  The ECU 1 includes a processing circuit unit 2, a ROM 3, a RAM 4, an input / output port 5, a CAN communication I / F 6, and the like. In-vehicle devices such as the headlight 80, the turn hazard 81, the wiper 82, and the door lock mechanism 83 are connected to the input / output port 5 of the ECU 1 via a cable or the like. The input / output port 5 can input / output signals to / from these in-vehicle devices, and outputs an operation command or the like given from the processing circuit unit 2 to each in-vehicle device and is input from each in-vehicle device. The information is given to the processing circuit unit 2.

  The processing circuit unit 2 includes a multi-core CPU or microcomputer that includes a plurality of processing units and performs parallel processing, a processing unit that performs parallel processing using a plurality of CPUs having a single processing unit, and the like. 2 processing part 22, 3rd processing part 23, and 4th processing part 24 are provided. The processing circuit unit 2 reads out and executes an application program stored in advance in the ROM 3 to perform control processing of the in-vehicle device connected to the input / output I / F 5. In addition, the processing circuit unit 2 advances the processing while storing temporary data generated in the process of performing the control processing in the RAM 4. The ROM 3 is composed of a nonvolatile memory element such as an EEPROM (Electrically Erasable Programmable ROM), and stores application programs, data tables, and the like in advance. The RAM 4 is configured by a memory element such as SRAM (Static RAM) or DRAM (Dynamic RAM), and temporarily stores various data generated in the processing process of the processing circuit unit 2.

  The CAN communication I / F 6 is connected to another ECU mounted on the vehicle via an in-vehicle LAN, and transmits / receives data to / from another ECU according to a CAN (Controller Area Network) protocol. The CAN communication I / F 6 transmits data given from the processing circuit unit 2 and gives data received from other ECUs to the processing circuit unit 2. Thereby, the ECU 1 can acquire information obtained from the in-vehicle device connected to the other ECU through the communication of the CAN communication I / F 6 and transmits an operation command to the in-vehicle device connected to the other ECU. Can be controlled.

  An IG switch signal is input to the input / output port 5. The IG switch may be, for example, a rotary switch that has an insertion hole into which a vehicle key is inserted, and starts the engine when the driver performs a rotation operation with the key inserted, It may be a push button type switch that starts the engine when the driver presses the button. The IG switch is switched in stages to an off position, an accessory position, an on position, and an engine start position. In general, an illuminating device such as the headlight 80 can operate in the off position, and an audio device, a car navigation device, a mirror driving device, and the like (not shown) can operate in the accessory position. In this way, only some in-vehicle devices can operate at the off position and the accessory position.

  On the other hand, in the ON position, many on-vehicle devices such as the turn hazard 81, the wiper 82, the door lock mechanism 83, a meter device (not shown), and an air conditioner can operate. Further, at the engine start position, the spark plug is ignited to start the engine, and after the engine is started, the engine is returned to the on position. In the ECU 1 according to the present invention, a case where the IG switch is in the off position or the accessory position is referred to as an off state, and a case where the IG switch is in the on position or the engine start position is referred to as an on state. Regarding the state change of the IG switch, an operation from the off state to the on state is referred to as an on operation, and an operation from the on state to the off state is referred to as an off operation. The ECU 1 can detect whether or not the IG switch is in an ON state based on the IG switch signal input to the input / output port 5.

  FIG. 2 is a schematic diagram for explaining an operation mode of the processing circuit unit 2. The processing circuit unit 2 is switched between the single processing unit operation mode and the multiple processing unit operation mode according to the state of the IG switch and the processing amount of the control processing. The single processing unit operation mode is a mode in which only the first processing unit 21 is operated and the second processing unit 22, the third processing unit 23, and the fourth processing unit 24 are not operated. The non-operation processing unit is configured to stop power supply or to perform power supply but partially stop an internal circuit (for example, a clock generation circuit) to reduce power consumption. The multiple processing unit operation mode is a mode in which a plurality of first processing units 21, second processing unit 22, third processing unit 23, and fourth processing unit 24 are operated. For convenience, all the processing units are operated. As will be described later, the processing amount in the processing circuit unit 2 is evaluated step by step, the first processing unit 21 and the second processing unit 22 are operated, and the third processing unit 23 and the fourth processing unit 24 are not operated. Also good. Similarly, the first processing unit 21, the second processing unit 22, and the third processing unit 23 may be operated, and the fourth processing unit 24 may be disabled. Further, in the single processing unit operation mode, depending on the processing capability of each processing unit, the first processing unit 21 and the second processing unit 22 are operated, and the third processing unit 23 and the fourth processing unit 24 are not operated. As described above, a mode in which a part of each processing unit is operated may be used.

  FIG. 3 is a schematic diagram for explaining functions of the processing circuit unit 2 by software. FIG. 3 shows a configuration when the processing circuit unit 2 of the ECU 1 executes an application program stored in the ROM 3. The first processing unit 21 functions as an operation mode setting unit 21a, a process allocation unit 21b, and a process execution unit 21c. The second processing unit 22, the third processing unit 23, and the fourth processing unit 24 function as a processing execution unit 22a, a processing execution unit 23a, and a processing execution unit 24a, respectively. The operation mode setting unit 21a determines whether the operation mode of the processing circuit unit 2 is the single processing unit operation mode or the multiple processing unit operation mode based on the input information. The input information is an IG switch signal, a port input signal, and a CAN input signal. The processing allocation unit 21b determines in which processing unit from the first processing unit 21 to the fourth processing unit 24 the processing is executed based on the allocation criteria registered in advance in the processing allocation table 31 stored in the ROM 3. decide. The allocation criterion is based on the type of control process based on the process request and the classification of each process in each control process (classification by external input process, arithmetic process, and output process). Rules that determine the allocation of processing are defined.

  FIG. 4 is a schematic diagram for explaining processing functions in the operation mode setting unit 21a. The operation mode setting unit 21a includes an IG switch signal detection processing unit 71, a port input processing request detection processing unit 72, a CAN processing request detection processing unit 73, an operation mode determination processing unit 74, and an operation mode change processing unit 75. The IG switch signal detection processing unit 71 detects that the IG switch has changed from the off state to the on state, and that the IG switch has changed from the on state to the off state. The port input processing request detection processing unit 72 detects a switch operation signal when a user's switch operation signal is input to the input / output port 5 and detects a processing request based on the switch operation signal. The port input process request detection processing unit 72 counts the number of port processes being executed. The CAN processing request detection processing unit 73 detects a processing request based on an input signal from the CAN. The operation mode determination processing unit 74 sets the operation mode to a single processing unit based on the processing requests detected by the IG switch signal detection processing unit 71, the port input processing request detection processing unit 72, and the CAN processing request detection processing unit 73. It is determined whether the operation mode or the multiple processing unit operation mode is set, and the determination result is output. When the operation mode to be set indicated by the determination result is different from the current operation mode, the operation mode change processing unit 75 sets each processing unit of the processing circuit unit 2 to the operation mode to be set and should set it. If the operation mode matches the current operation mode, the current operation mode is maintained.

  FIG. 5 is a flowchart showing the procedure of the operation mode setting process of the processing circuit unit 2. First, the operation mode setting unit 21a in the first processing unit 21 determines whether or not the IG switch is turned on (step S1). When it is determined that the IG switch is in the on state (S1: YES), the IG switch is in the on position or the engine start position, and many other ECUs are in steady operation. There is a possibility that many processing requests by the port input signal from the input / output port 5 may occur, and the process proceeds to step S4 to perform processing for setting the operation mode to the multiple processing unit.

  In step S4, the operation mode setting unit 21a maintains the current mode when the multiple processing unit operation mode to be set based on the determination result matches the current mode, and changes the operation mode when they do not match. The processing unit 75 performs processing for changing the second processing unit 22, the third processing unit 23, and the fourth processing unit 24 to the operating state. In the multiple processing unit operation mode, the process allocation unit 21 b executes the allocation of the control process to each processing unit based on the process allocation table 31.

  When it is determined that the IG switch is not in the on state (S1: NO), the operation mode setting unit 21a determines whether or not communication by CAN is being performed (step S2). If it is determined that the CAN communication is being performed (S2: YES), a large number of input / output processes in the input / output port 5 may be caused by the control process requested by the CAN input signal. Based on the number of port processes being executed counted by the port input process request detection processor 72, the operation mode determination processor 74 determines that the number of port processes (input / output processes) via the input / output port 5 is a predetermined value. It is determined whether or not the port processing is greater than or equal to a predetermined amount depending on whether or not it is above (step S3). When it is determined that the number of port processes is greater than or equal to a predetermined value and the port processes are greater than or equal to a predetermined amount (S3: YES), the process proceeds to step S4, and a process of setting to the multiple processing unit operation mode is performed.

  If it is determined in step S2 that the CAN communication is not being performed (S2: NO), and if it is determined in step S3 that the port processing is not equal to or greater than the predetermined amount (S3: NO), high-load port data processing is required. Is determined (step S5). FIG. 6 is a chart showing a table describing types of high-load port data processing, and the table is stored in the ROM 3. The high-load port data processing is, for example, security processing, external failure diagnosis processing, self-diagnosis processing, and the like, and is control processing that is predicted to cause a high load on data input / output processing at the input / output port 5. is there. When security processing is being executed in the processing circuit unit 2, a plurality of processes for confirming whether a plurality of in-vehicle devices are operating correctly in a predetermined order are triggered by an input signal from one in-vehicle device. The situation that occurs is predicted. In the external failure diagnosis process and the self-diagnosis process, it is scheduled on the diagnosis process sequence that a plurality of processes for confirming whether or not a failure has occurred in a plurality of in-vehicle devices occurs. When it is determined that high load port data processing is necessary (S5: YES), the process proceeds to step S4, and processing for setting the multiple processing unit operation mode is performed.

  If it is determined in step S5 that high load port data processing is not required (S5: NO), processing for setting the single processing unit operation mode is performed in step S6. In step S6, the operation mode setting unit 21a maintains the current mode when the single processing unit operation mode to be set based on the above determination results matches the current mode, and does not match The operation mode change processing unit 75 performs processing for changing the second processing unit 22, the third processing unit 23, and the fourth processing unit 24 to the non-operation state. In the multiple processing unit operation mode, the process allocation unit 21 b executes the allocation of the control process to each processing unit based on the process allocation table 31. The single processing unit operation mode may be a mode in which a part of each processing unit of the processing circuit unit 2 is operated depending on the processing capability of each processing unit.

  After the setting process to the multiple processing unit operation mode in step S4 and the setting process to the single processing unit operation mode in step S6, the operation mode setting process is terminated and the process returns to the start.

  Next, allocation processing by the processing allocation unit 21b in the multiple processing unit operation mode will be described. FIG. 7 is a flowchart showing the procedure of allocation processing by the processing allocation unit 21b. First, in step S10, the process allocation unit 21b determines whether there is a request for starting a new process in the control process based on the process request. When it is determined that there is no request for starting a new process (S10: NO), the determination in step S10 is repeated. If it is determined that there is a request for starting a new process (S10: YES), the process allocation unit 21b allocates a new process based on the process allocation table 31 (first processing unit 21, first process) in step S11. Any one of the two processing units 22, the third processing unit 23, and the fourth processing unit 24) and assigns the new processing to the determined processing unit. After assigning a new process in step S11, the process returns to step S10.

  FIG. 8 is a schematic diagram for explaining an example of the process allocation table 31. The process allocation table 31 is a rule that determines the allocation of processes to each processing unit of the processing circuit unit 2 according to the type of control process based on the process request and the purpose of each process in the control process (purpose classified into several types). Is stipulated. In FIG. 8, the types of control processing based on the processing request correspond to various functions of the in-vehicle device so as to be classified by door lock SW (switch), automatic door lock, turn hazard, and the like. Each process is roughly divided into an output process for outputting a control signal to the in-vehicle device and an output pre-process executed by the processing circuit unit 2 based on the processing request before the output process is executed. Further, the pre-output processing can be classified into an external input process that accepts an external input and an arithmetic process that is performed by the processing circuit unit 2 based on the external input. Overall, each process is classified into an external input process, an arithmetic process, and an output process due to its nature.

  The process allocation table 31 is classified according to the type of control process and the type of each process (external input process, arithmetic process, output process), and is allocated to each processing unit of the processing circuit unit 2 for each classification. In the example illustrated in FIG. 8, for example, with respect to the first processing unit 21, regarding the output preprocessing, the door lock SW input control is assigned to the external input processing, and the automatic door lock control and the front fog control are assigned to the arithmetic processing. The door lock output control is assigned. The process allocating unit 21b searches which of the process classifications in the process allocation table 31 corresponds to the new process, and determines that the process unit having the corresponding class is a process unit to which the new process is allocated.

  Each processing unit to which processing is allocated by the processing allocation unit 21b performs pre-output processing at the same time, and then performs output processing at the same time. Further, each processing unit of the processing circuit unit 2 may perform external input processing at the same time, then perform arithmetic processing at the same time, and perform output processing at the same time. In order to perform such parallel processing, it is a necessary condition that there is no interdependency between the output preprocessing (or external input processing and arithmetic processing) and the processes classified for each output process. In addition, if the processing load is made substantially equal for each processing unit classified for each output processing (or external input processing, arithmetic processing) and output processing, the processing waiting time is reduced and the overall processing is reduced. Increases speed. For example, when the time required for the turn hazard control assigned to the calculation processing of the second processing unit 22 is 3 ms, the calculation processing of the first processing unit 21 includes the automatic door lock control and the front processing time of 1.4 ms. By assigning fog control, the processing time of the first processing unit 21 is set to 2.8 ms so as to equalize the processing load of each processing unit.

  In the above-described embodiment, an example in which all the processing units are operated in the multiple processing unit operation mode has been shown. However, the processing unit that operates the processing circuit unit 2 by evaluating the number of port processing steps in stages. The number may be set. FIG. 9 is a chart showing the correspondence between the port processing count N and the processing unit usage count. If the port processing number N is less than N1, the number of processing units to be operated is one. If the port processing number N is N1 or more and less than N2, the number of processing units to be operated is two. Is equal to or greater than N2, the number of processing units to be operated is all within the processing circuit unit 2. In the flowchart of FIG. 5, the predetermined value of the determination in step S3 is set to N1, and if the port processing number N is equal to or greater than N1, the process proceeds to step S4 assuming that the port processing is equal to or greater than the predetermined amount, and the multiple processing unit operation mode setting Sometimes, the number of processing units to be operated may be obtained based on the correspondence between the port processing number N and the processing unit usage number stored in advance in the ROM 3 or the like.

  As described above, according to the present embodiment, the ECU 1 performs the control process for the plurality of in-vehicle devices mounted on the vehicle by the processing circuit unit 2 including the plurality of processing units. The IG switch signal detection processing unit 71 acquires the on / off state of the IG switch, and the operation mode determination processing unit 74 increases the number of processing units that perform control processing for the in-vehicle device based on the processing request for the in-vehicle device. It is determined whether or not to perform. The operation mode change processing unit 75 changes all the processing units of the processing circuit unit 2 to the operating state when the IG switch is in the on state, and one of the processing circuit units 2 when the IG switch is in the off state. The processing unit is set to the operating state, and the remaining processing units of the processing circuit unit 2 are changed to the non-operating state. In addition, the operation mode change processing unit 75 determines the number of processing units to be in the operation state when the IG switch is in the off state and the operation mode determination processing unit 74 determines to increase the number of processing units performing the control process. increase. As a result, a single processing unit operation mode in which a part of the processing units of the processing circuit unit 2 is set in an operating state and the remaining processing units of the processing circuit unit 2 are set in a non-operating state while the IG switch is turned off to reduce power consumption Therefore, it is possible to increase the processing capability by making a change to increase the number of processing units in response to a processing request for the in-vehicle device.

  Further, according to the present embodiment, the port input processing request detection processing unit 72 counts the number of port processings based on the processing request, and the operation mode determination processing unit 74 counts the port input processing request detection processing unit 72. When the number of processes performed is equal to or greater than a predetermined value, it is determined that the number of processing units that perform control processing is increased. The port input processing request detection processing unit 72 can reliably count the number of processes based on the processing request, and can increase the number of processing units when the number of processes increases to a predetermined value or more.

  In addition, according to the present embodiment, specific high load port data processing is stored in the ROM 3, and the operation mode determination processing unit 74 performs specific high load port data processing in which processing related to the processing request is stored. If they match, it is determined to increase the number of processing units that perform control processing. High-load port data processing is, for example, security processing, external failure diagnosis processing, self-diagnosis processing, etc., and a processing request for requesting a control processing that is predicted to cause a high-load situation such as input / output processing. It is. The number of processing units can be increased in response to the fact that a high load processing request is accepted and high load processing is required.

  In addition, according to the present embodiment, the specific high load port data processing is performed in response to a processing request for requesting a plurality of processes for confirming whether or not the in-vehicle device is operating in a predetermined order. The number of parts can be increased. For example, when security processing is being executed, a situation in which a plurality of processes for confirming whether a plurality of in-vehicle devices are operating correctly in a predetermined order is triggered by an input signal from one in-vehicle device Therefore, it is possible to cope with such processing by increasing the number of processing units.

  Further, according to the present embodiment, the number of processing units corresponding to the case where the specific high-load port data processing is a processing request for requesting a plurality of processing for confirming whether or not a failure has occurred in the in-vehicle device. Can be increased. For example, in the external failure diagnosis process and the self-diagnosis process, it is planned on the diagnosis process sequence that a plurality of processes for confirming whether or not a plurality of in-vehicle devices have a failure will occur. Such processing can be dealt with by increasing the number of processing units.

  Further, according to the present embodiment, the process allocating unit 21b outputs the process based on the process request to the in-vehicle device and outputs the control signal to the in-vehicle device, and the output executed by the processor based on the process request before the output process is executed. The preprocessing is classified and assigned to a plurality of processing units, and the processing circuit unit 2 including the plurality of processing units simultaneously performs the output preprocessing and output processing. As a result, the processing circuit unit 2 can simultaneously perform processing, and the processing capability can be increased.

  In addition, according to the present embodiment, the processing allocation unit 21b processes the processing circuit unit 2 so that the processing load in the processing circuit unit 2 including a plurality of processing units is substantially equal for each of the output preprocessing and the output processing. assign. As a result, the processing waiting time in the processing circuit unit 2 can be reduced, and the processing capability can be increased.

  The disclosed embodiments should 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 description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 ECU (on-vehicle controller)
2 Processing Circuit Unit 21 First Processing Unit (Processing Unit)
21b Process allocation unit (process allocation means)
22 Second processing unit (processing unit)
23 Third processing unit (processing unit)
24 4th processing part (processing part)
3 ROM (storage means)
71 IG switch signal detection processing unit (acquisition means)
72 Port input processing request detection processing unit (request receiving means, counting means)
73 CAN processing request detection processing unit (request receiving means)
74 Operation mode determination processing unit (determination means)
75 Operation mode change processing unit (operation change means)

Claims (7)

In an in-vehicle control device that performs control processing for a plurality of controlled devices mounted on a vehicle by a plurality of processing units,
Obtaining means for obtaining an on / off state of the ignition switch;
Request accepting means for accepting a processing request for the controlled device;
A determination unit that determines whether to increase the number of processing units that perform control processing on the controlled device based on the processing request received by the request receiving unit;
When the acquisition unit acquires the on state, the change is performed so that all of the plurality of processing units are in the operating state, and when the acquisition unit acquires the off state, some of the plurality of processing units are set as the operating state. , When the remaining of the plurality of processing units is changed to a non-operating state, the acquisition unit acquires an off state, and the determination unit determines to increase the number of processing units performing the control process. An in-vehicle control device comprising: an operation changing unit that increases the number of processing units. A counting unit that counts the number of processes based on the processing request received by the request receiving unit;
The in-vehicle control device according to claim 1, wherein the determination unit determines to increase the number of processing units that perform control processing when the number of processes counted by the counting unit is equal to or greater than a predetermined value. . A storage means for storing a specific high-load processing request;
The determination unit determines to increase the number of processing units that perform control processing when the processing request received by the request reception unit matches a specific high load processing request stored in the storage unit. The in-vehicle control device according to claim 1 or 2, characterized by the above-mentioned.   The in-vehicle control according to claim 3, wherein the specific high-load processing request is a processing request for requesting a plurality of processes for confirming whether or not the controlled device is operating in a predetermined order. apparatus.   The in-vehicle control device according to claim 3, wherein the specific high load processing request is a processing request for requesting a plurality of processes for confirming whether or not a failure has occurred in the controlled device.   The processing based on the processing request received by the request receiving means is classified into output processing for outputting a control signal to the controlled device, and pre-output processing executed by the processing unit based on the processing request before execution of the output processing. 6. The method according to claim 1, further comprising a process allocating unit that allocates the plurality of processing units, wherein the plurality of processing units simultaneously perform pre-output processing and output processing. The vehicle-mounted control apparatus as described in one.   The on-vehicle device according to claim 6, wherein the process allocating unit allocates processes to the plurality of processing units so that processing loads in the plurality of processing units are substantially equal for each of output pre-processing and output processing. Control device.

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