JP2008261793A - Automatic inspection device of electronic control unit, and automatic inspection method of electronic control unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic inspection device of an electronic control unit capable of accurately inspecting disconnection, and an automatic inspection device of the electronic control unit. <P>SOLUTION: A driving condition of a vehicle is input to an HILS (Hardware In the Loop Simulation) system 10. A disconnection pattern of a wire harness 16 is input. Disconnection operation is performed based on the input disconnection pattern. An operation value of an ECU (Electric Control Unit) 50 during disconnection operation is incorporated by a PC 20. An operation value of an engine model 14 in the HILS system 10 is incorporated by the PC 20. The PC 20 executes debugging of the ECU 50 based on the incorporated operation value, and executes the disconnection inspection for verifying the behavior, operation and the like of the vehicle during disconnection. Preferably, the disconnection pattern is set synchronously with the driving condition of the vehicle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an automatic inspection device for an electronic control unit and an automatic inspection method for an electronic control unit, and more particularly to an automatic inspection device for an electronic control unit and an automatic inspection method for an electronic control unit suitable for automating disconnection inspection. About.

  Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-361292, a system for automatically inspecting an on-vehicle electronic control unit using a simulator is known. According to this system, the simulator and the electronic control unit are connected by the wire harness. Then, by sending and receiving a pseudo sensor signal and an actuator drive signal between the electronic control unit and the simulator, the electronic control unit is operated in the same manner as when it is connected to the actual machine that is the original control target. Thereby, it is possible to automatically check whether or not the electronic control unit operates normally by designating an arbitrary operation condition.

JP 2004-361292 A JP 2004-27930 A JP 2006-64411 A JP 2002-288245 A

  By the way, in the automatic test | inspection using the simulator mentioned above, the disconnection test | inspection of a wire harness may be performed. In the disconnection inspection, more specifically, when a predetermined signal line is disconnected at a predetermined timing, changes in other sensor signals, operation states of the electronic control unit, and the like are confirmed. Thereby, the influence which the disconnection of a signal has on other sensor signals or drive signals can be effectively confirmed. Moreover, when disconnection occurs, it can be confirmed whether or not the electronic control unit operates normally according to a predetermined program.

  Here, since the disconnection work of the wire harness in the disconnection inspection is performed by a human hand, an enormous number of man-hours are required and improvement has been desired. Further, the disconnection work is performed while confirming the change of the signal by a monitor or the like. For this reason, it has been a problem that the inspection cannot be accurately performed at the timing at which disconnection is desired and the inspection accuracy is low.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an automatic inspection device for an electronic control unit and an automatic inspection method for an electronic control unit that can accurately perform a disconnection inspection. And

In order to achieve the above object, a first invention is an automatic inspection device for an electronic control unit that takes in a sensor signal and outputs an actuator drive signal,
Driving pattern generating means for outputting a signal corresponding to the prescribed driving pattern using hardware resources of a computer;
A simulator that generates, as a pseudo sensor signal, a signal equivalent to a sensor signal that is generated by receiving the actuator drive signal when an actual machine that is an original control target of the electronic control unit operates along the operation pattern; ,
A signal exchanging means for supplying the pseudo sensor signal to the electronic control unit, and for receiving a drive signal of the actuator emitted from the electronic control unit;
Disconnection pattern setting means for setting a disconnection pattern of an exchange signal transmitted and received by the signal exchange means;
Based on the disconnection pattern, disconnection means for disconnecting the exchange signal;
Inspecting means for inspecting the processing result in the electronic control unit and / or the simulator using hardware resources of the computer when the transmission / reception signal is disconnected by the disconnection means,
It is characterized by providing.

According to a second invention, in the first invention,
The disconnection pattern setting means is set in synchronization with the operation pattern.

According to a third invention, in the first or second invention,
The disconnection pattern setting means sets the disconnection period in the disconnection pattern to a predetermined period or longer.

A fourth invention is any one of the first to third inventions,
The inspection means executes debugging of the electronic control unit.

According to a fifth invention, in any one of the first to fourth inventions,
The signal transmission / reception means is a wire harness for conducting the electronic control unit and the simulator,
The disconnection means is
A relay interposed in the wire harness;
Control means for controlling the relay based on the disconnection pattern;
It is characterized by including.

A sixth invention is any one of the first to fifth inventions,
The simulator
A plurality of model simulators simulating the vehicle's controlled objects;
Storage means for storing the processing results in the model simulator in a readable state;
A pseudo sensor signal generating means for generating the pseudo sensor signal in synchronization with a processing result of another model simulator stored in the storage means;
It is characterized by including.

In order to achieve the above object, a seventh invention is an automatic inspection method for an electronic control unit,
A signal equivalent to the sensor signal generated by receiving the actuator drive signal when the actual control target of the electronic control unit that takes in the sensor signal and outputs the actuator drive signal operates along the operation pattern. Is generated as a pseudo sensor signal, and an inspection method for an electronic control unit including a simulator that receives a drive signal of an actuator emitted from the electronic control unit,
Outputting a signal corresponding to a prescribed driving pattern to the simulator using computer hardware resources;
Outputting a signal corresponding to the disconnection pattern set in synchronization with the operation pattern to the simulator using hardware resources of a computer;
A step of disconnecting a transmission / reception signal transmitted / received between the simulator and the electronic control unit along the disconnection pattern;
Inspecting the processing result in the electronic control unit and / or the simulator using hardware resources of a computer when the step of disconnecting the transmission / reception signal is performed;
It is characterized by providing.

  According to the first invention, in the disconnection inspection, the disconnection operation of the pseudo sensor signal or the actuator drive signal exchanged between the electronic control unit and the simulator is executed along the set disconnection pattern. For this reason, according to this invention, compared with the case where a disconnection work is implemented manually, an operation man-hour can be reduced significantly. In addition, since the transmission / reception signal can be disconnected in a predetermined pattern by the disconnection means, the accuracy of disconnection inspection can be dramatically improved, and even a disconnection pattern that is difficult to achieve manually can be realized with high accuracy. it can.

  According to the second invention, the disconnection pattern is set in synchronization with the operation pattern. Sending and receiving signals such as sensor signals and actuator drive signals vary in a complex manner depending on the operation pattern. For this reason, according to the present invention, by setting the disconnection pattern in synchronization with the operation pattern, it is possible to set a more detailed disconnection pattern corresponding to the change in the exchange signal, and improve the quality of the disconnection inspection. Can do.

  According to the third invention, the disconnection period in the disconnection pattern is set to be equal to or longer than the predetermined disconnection period. A short-term disconnection of an exchange signal is difficult to distinguish from noise superimposed on the exchange signal. For this reason, according to the present invention, by setting the disconnection period to a predetermined period or more, it is possible to effectively differentiate between disconnection and noise generated in the transmission / reception signal.

  According to the fourth aspect of the invention, debugging of the electronic control unit is executed using the processing result in the electronic control unit and / or the simulator when the transmission / reception signal is disconnected by the disconnection means. For this reason, according to the present invention, the debugging of the electronic control unit can be executed simultaneously with the execution of the disconnection inspection, so that the work efficiency can be dramatically improved.

  According to the fifth invention, transmission / reception of signals between the electronic control unit and the simulator is performed via the wire harness. A relay is interposed in the middle of the wire harness, and the relay is driven and controlled along the disconnection pattern. For this reason, according to the present invention, the exchange signal can be disconnected along the disconnection pattern with a simple configuration.

  According to the sixth aspect of the invention, the simulator is configured by a plurality of model simulators that simulate the control target parts of a vehicle that is an actual machine. The processing results in each model simulator are stored in a state where they can be read from other model simulators. Therefore, according to the present invention, each model simulator can generate a pseudo sensor signal in synchronization with the processing result of another model. Thereby, a simulation closer to a real vehicle can be realized, and the inspection of the electronic control unit can be executed.

  According to the seventh invention, in the disconnection inspection, the disconnection operation of the pseudo sensor signal or actuator drive signal exchanged between the electronic control unit and the simulator follows the disconnection pattern set in synchronization with the operation pattern. Executed. For this reason, according to this invention, compared with the case where a disconnection work is implemented manually, an operation man-hour can be reduced significantly. In addition, since the exchange signal can be disconnected with a disconnection pattern synchronized with the operating conditions, the accuracy of disconnection inspection can be dramatically improved, and even a disconnection pattern that is difficult to achieve manually can be realized with high accuracy. it can.

  Several embodiments of the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element which is common in each figure, and the overlapping description is abbreviate | omitted. The present invention is not limited to the following embodiments.

Embodiment 1 FIG.
[Configuration of Embodiment 1]
FIG. 1 is a diagram for explaining a system configuration according to the first embodiment of the present invention. As shown in FIG. 1, the inspection system of the present embodiment is configured using a HILS (Hardware In the Loop Simulation) system 10. The HILS system 10 includes a HILS personal computer (PC) 20. The HILS system 10 is connected to an ECU (Electronic Control Unit) 50 via a wire harness 16.

  The HILS system 10 is a simulation system for realizing a desired simulation while exchanging signals with the ECU 50 in the same manner as actual machines (vehicles and internal combustion engines) that are the original control targets of the ECU 50. The PC 20 stores HILS control software (not shown) and inspection software. The HILS control software is software for realizing the simulation in the HILS system 10. The HILS control software includes, for example, software for instructing the HILS system 10 about the driving pattern of the vehicle to be simulated in the simulation.

  The HILS system 10 includes a driver model 12 and an engine model 14. The driver model 12 is a model for simulating the driving operation by the driver. When the driver model 12 is supplied with the driving pattern, the driver model 12 calculates an accelerator opening for realizing a vehicle speed suitable for the pattern, and relates to the accelerator opening. Information is supplied to the engine model 14.

  The engine model 14 is a model for simulating the function of the engine. Various sensors such as an A / F sensor for measuring the exhaust air-fuel ratio, a crank angle sensor for measuring the crank angle, and an air flow meter for measuring the intake air amount Ga are mounted on the actual engine. Yes. Moreover, an actuator such as a fuel injection valve is mounted on the actual engine. The engine model 14 simulates the operation of the actual engine of the internal combustion engine and various actuators based on the accelerator opening information supplied from the driver model 12 and the actuator signal supplied from the ECU 50, and is generated in the actual machine. Signals similar to various sensor signals are generated as simulated sensor signals.

 The pseudo sensor signal generated in the engine model 14 is supplied to the ECU 50 via the wire harness 16. Examples of the pseudo sensor signal supplied from the engine model 14 to the ECU 50 include a fuel injection amount (fuel injection time TAU) such as a pseudo signal of the A / F sensor (pseudo signal of the exhaust air / fuel ratio) and a pseudo signal of the intake air amount Ga. ), A signal required for synchronizing the processing of the ECU 50 with the processing of the HILS system 10, such as a signal required by the ECU 50 or a pseudo signal of the crank angle sensor.

  The ECU 50 is an electronic control unit for engine control in the development process. The ECU 50 executes a predetermined process necessary for controlling the internal combustion engine based on the pseudo sensor signal supplied from the engine model 14 and outputs the actuator signal generated as a result to the engine model 14 again. The ECU 50 according to the present embodiment, for example, calculates the fuel injection time TAU based on the pseudo sensor signal such as the intake air amount Ga and the exhaust air / fuel ratio A / F, and injects the fuel injection valve at an appropriate timing. For example, a process of outputting an injection signal (Inj signal) for opening the valve for the time TAU as an actuator drive signal is performed.

  As shown in FIG. 1, a disconnection box 18 is disposed in the middle of the wire harness 16. The disconnection box 18 is a device configured by a relay, and disconnects each signal line of the wire harness 16 at a desired timing. The HILS control software in the PC 20 described above includes software for instructing the disconnection box 18 of the disconnection pattern of the sensor signal to be simulated in the simulation, that is, the disconnection location, disconnection period, and disconnection timing. The disconnection box 18 performs disconnection control of the wire harness 16 based on the disconnection pattern supplied from the PC 20.

[Operation of Embodiment 1]
(Operation during simulation)
Next, with reference to FIG. 2, the operation during the execution of the simulation using the HILS system 10 will be described. FIG. 2 is a schematic diagram for explaining a simulation operation using the HILS system 10. As shown in this figure, first, the driving conditions of the vehicle in the simulation input to the PC 20 are input to the driver model 12 of the HILS system 10. Specifically, the target vehicle speed SPD and the target rotational speed NE of the vehicle are input here.

  The driver model 12 that has received the supply of the driving conditions calculates the accelerator opening based on the supplied target vehicle speed. The calculated accelerator opening is supplied to the engine model 14 as described above. The engine model 14 calculates an intake air amount Ga corresponding to the accelerator opening degree supplied from the driver model 12. Further, the engine model 14 calculates the fuel injection amount supplied to each cylinder based on the Inj signal supplied from the ECU 50. The engine model 14 calculates the exhaust air / fuel ratio A / F by calculating the ratio between the intake air amount Ga and the fuel injection amount, and outputs a signal representing the calculated value as a pseudo signal of the A / F sensor. To do.

  The pseudo signal of the A / F sensor is supplied from the engine model 14 to the ECU 50 together with the pseudo signal of the intake air amount Ga. The ECU 50 calculates a basic fuel injection amount TAUB based on the intake air amount Ga, and then calculates a correction coefficient for making the pseudo signal of the A / F sensor coincide with the target value. Then, the final fuel injection time TAU is calculated by correcting the basic fuel injection amount TAUB with the correction coefficient. That is, the ECU 50 calculates the fuel injection time TAU with air-fuel ratio feedback control based on the pseudo signal of the A / F sensor so that the pseudo value of the exhaust air-fuel ratio matches the target air-fuel ratio.

  The ECU 50 is supplied with a crank angle signal as one of the pseudo sensor signals from the engine model 14. The ECU 50 detects the timing at which fuel is to be injected in each cylinder based on the crank angle signal, and outputs an injection signal (Inj signal) reflecting the fuel injection time TAU at that timing. When the engine model 14 receives the supply of the Inj signal, the engine model 14 proceeds with the model processing assuming that the fuel injection valve is opened for the fuel injection time TAU at the timing of receiving the signal.

  In the system shown in FIG. 1, the simulation of the HILS system 10 is advanced with the transmission and reception of signals as described above. This makes it possible to easily reproduce operating conditions such as high-load operation and rapid acceleration that are difficult to reproduce with an actual machine. The calculated value of the ECU 50 and the calculated value of the engine model 14 during the execution of the simulation are taken into the PC 20 as needed, and comparison verification with the database in the PC 20 is executed.

(About disconnection inspection)
In an actual machine that is an original control target of the ECU 50, a plurality of sensors such as an A / F sensor and a plurality of actuators such as a fuel injection valve are connected to the ECU 50 via a wire harness. As described above, the ECU 50 calculates the actuator drive signal based on the sensor signal. For this reason, if an abnormality such as a disconnection or a short circuit occurs in the wire harness and the signal transmission / reception is interrupted, there is a possibility of causing a malfunction of the control device. Possible causes of signal disconnection include, in addition to abnormalities in the wire harness, rotational speed mismatch due to a rotational speed sensor (resolver) failure, IGBT failure, high-voltage cable contact failure, current sensor itself failure, and the like. For this reason, if these disconnection patterns are reproduced using the HILS system 10, the behavior of the vehicle when the disconnection abnormality occurs, the operation state of the ECU 50, and the like can be efficiently confirmed.

  Here, if the wire harness disconnection operation in the disconnection inspection is performed manually, it becomes difficult to disconnect at a predetermined disconnection timing. FIG. 3 is a diagram for explaining an example of a signal exchanged between the ECU 50 and the engine model 14 and a disconnection pattern. In this figure, time t1 indicates the time for switching of signal 1, and time t2 indicates the time for switching of signal 2. As shown in this figure, as a disconnection pattern to be inspected, for example, a pattern (pattern 1) in which disconnection is executed at t = t1, t = t2, and a pattern (pattern 2) in which disconnection is executed during a period of t1 <t <t2. ), A pattern (pattern 3) in which disconnection is executed at t = t1 and connection is made again at t = t2 can be considered. However, the manual disconnection operation needs to be performed while confirming the timing of signal switching on a monitor or the like, so that these disconnection patterns cannot be accurately reproduced.

  Therefore, in the present embodiment, the disconnection box 18 is used. As described above, the disconnection box 18 is arranged in the middle of the wire harness 16, drives an internal relay based on a disconnection signal supplied from the PC 20, and controls connection / disconnection of the wire harness 16. More specifically, in the disconnection pattern, the disconnection location, disconnection period, and disconnection timing are set in synchronization with the driving conditions of the vehicle.

  Thus, according to the HILS system 10 provided with the disconnection box 18, the operating conditions of the actual vehicle can be simulated, and the wire harness can be disconnected at a desired timing in synchronization with the operating conditions. Thereby, it is possible to accurately execute a disconnection inspection that is difficult to achieve manually.

[Specific Processing in Embodiment 1]
Next, with reference to FIG. 4, the specific content of the process performed in this Embodiment is demonstrated. FIG. 4 is a flowchart of a routine for performing a disconnection inspection using the HILS system 10.

  In the routine shown in FIG. 4, first, the driving conditions of the vehicle are input (step 100). Here, specifically, the target vehicle speed and the engine speed in the actual machine that is the original control target of the ECU 50 are input to the PC 20 as operating conditions. The input driving conditions are supplied to the driver model 12. In the driver model 12, the accelerator opening is calculated based on the supplied command value and supplied to the engine model 14. The engine model 14 executes feedback control in a simulated manner with the ECU 50, and calculates the intake air amount Ga and the fuel injection amount of each cylinder.

  Next, the disconnection pattern of the wire harness is input (step 102). Here, specifically, a disconnection location, a disconnection period, and a disconnection timing are input. The disconnection pattern is set in synchronization with the operating condition input in step 100. Further, the disconnection period is set to a predetermined period or more (for example, 50 ms or more) in order to differentiate from noise superimposed on the signal.

  Next, a disconnection operation is performed based on the disconnection pattern input in step 102 (step 104). Here, specifically, a disconnection signal is supplied from the PC 20 to the disconnection box 18. The disconnection box 18 disconnects a predetermined wire harness at a predetermined timing based on the supplied disconnection signal.

  Next, the calculated value of the ECU 50 at the time of disconnection execution in step 104 is taken into the PC 20 (step 106). Specifically, RAM values such as actuator drive signals, diagnosis signals, and flag information of various control modes calculated by the ECU 50 are supplied to the PC 20 as inspection data. Further, the calculated value of the engine model 14 in the HILS system 10 is taken into the PC 20 (step 108). Specifically, calculation values such as the intake air amount Ga, the fuel injection amount of each cylinder, and the ignition timing in the engine model 14 are taken into the PC 20 as inspection data.

  In the routine shown in FIG. 3, next, inspection of inspection data is executed (step 110). Here, specifically, comparison verification between the calculated values of ECU 50 and the calculated values of engine model 14 taken in steps 106 and 108 and a database stored in PC 20 is performed. As a result, debugging of the ECU 50 is executed, and a disconnection inspection for verifying the behavior and operation of the vehicle at the time of disconnection is executed.

  As described above, according to the first embodiment, by controlling the disconnection box 18 in the HILS system 10 including the disconnection box 18, it is possible to accurately realize a disconnection pattern that is difficult to achieve manually. Thereby, the reduction of the man-hour required for a disconnection test | inspection and the improvement of an inspection precision can be aimed at. Also, since the disconnection pattern can be set in synchronization with the operating conditions, it is possible to set the disconnection pattern under operating conditions that are difficult to achieve with an actual machine, and a wide disconnection inspection is possible.

  In addition, the disconnection inspection can acquire inspection data based on operating conditions and disconnection patterns that are difficult to reproduce in an actual machine, so that the ECU 50 can be debugged efficiently.

  By the way, in Embodiment 1 mentioned above, it is supposed that the disconnection / connection of the signal which flows through the wire harness 16 is controlled by turning on / off the relay inside the disconnection box 18, but the engine model 14 and the ECU 50 are connected to each other. The method of disconnecting the signal between them is not limited to this. That is, the engine model 14 or the ECU 50 may form a disconnection state by restricting the output or input of a predetermined signal.

  In the first embodiment described above, in the HILS system 10 including the engine model 14, the simulation of fuel injection control in the vehicle is executed, and the disconnection inspection and ECU debugging are executed. The HILS system 10 However, the simulation that can be executed in is not limited to this. That is, for example, in a HILS system including a motor model that simulates a motor of a hybrid vehicle, a simulation of motor control in the vehicle may be executed, or in a HILS system including a model such as a battery or a brake. A simulation may be executed.

  In the first embodiment described above, the ECU 50 is the electronic control unit in the first invention, the HILS system 10 is the simulator in the first invention, and the wire harness 16 is the signal transmitting / receiving means in the first invention. Each corresponds. Further, when the ECU 50 executes the process of step 100, the “driving pattern generation means” in the first aspect of the invention executes the process of step 102, so that the “disconnection pattern” in the first aspect of the invention. When the “setting means” executes the process of step 104, the “disconnection means” in the first invention performs the process of step 110, so that the “inspection means” in the first invention allows , Each has been realized.

  In the first embodiment described above, the “control means” according to the fifth aspect of the present invention is implemented when the ECU 50 executes the process of step 104 described above.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to FIG. 5 and FIG. The system of the present embodiment can be realized by executing a routine shown in FIG. 7 described later using the hardware configuration shown in FIG.

[Configuration of Embodiment 2]
FIG. 5 is a diagram for explaining a system configuration according to the second embodiment of the present invention. As shown in FIG. 5, the inspection system of the present embodiment is configured using a HILS system 60 that simulates a hybrid vehicle that is an actual machine. That is, the HILS system 60 is configured as a system provided with a plurality of HILS systems each composed of a single model described in the first embodiment for each control target. Specifically, the HILS system 60 includes a HILS system 10a including an EFI-ECU 50a for realizing engine control. The HILS system 10a incorporates an engine model 14a and a personal computer (PC) 20a for HILS. The engine model 14a is a model for simulating the function of the engine, similar to the engine model 14 described in the first embodiment. The pseudo sensor signal generated in the engine model 14a is supplied to the EFI-ECU 50a via the wire harness 16a.

  As shown in FIG. 5, a disconnection box 18 a is disposed in the middle of the wire harness 16. The disconnection box 18a is a device configured by a relay, and disconnects each signal line of the wire harness 16 at a desired timing.

  The HILS system 60 includes a HILS system 10b including a motor model 14b and an MG-ECU 50b for controlling the motor model 14b. The motor model 14b is a model for simulating the function of a motor generator mounted as a power source in a hybrid vehicle that is an actual machine. The HILS system 10b includes the same configuration as the HILS system 10a described above, that is, a PC 20b, a wire harness 16b, a disconnection box 18b, and the like.

  Similarly, the HILS system 60 includes a HILS system 10c including a battery model 14c and a Bat-ECU 50c for controlling the battery model 14c. The battery model 14c is a model for simulating the function of a battery mounted as a power storage device in a hybrid vehicle that is an actual machine. The HILS system 10c has the same configuration as the HILS system 10a described above, that is, the PC 20c, the wire harness 16c, the disconnection box 18c, and the like.

  The HILS system 60 includes a shared memory 62 and a host PC 64. The HILS systems 10a, 10b, and 10c described above are each connected to the shared memory 62. The shared memory 62 shares information of each HILS system. The host PC 64 is connected to the PCs 20a, 20b, and 20c. The host PC 64 synchronizes the time of each PC 20 and executes the process of integrating the inspection results in each HILS system 10.

[Features of Embodiment 2]
In the first embodiment described above, in the HILS system 10 including the engine model 14, the fuel injection control simulation in the vehicle is executed, and the disconnection inspection and the ECU debugging are executed. However, in a vehicle that is an actual machine, drive control is performed by synchronizing the processing by a plurality of ECUs.

  FIG. 6 is a diagram illustrating changes in various signals of a hybrid vehicle as an actual machine. As shown in this figure, when the throttle is opened in the period from time t1 to time t2 in the actual machine, a plurality of control amounts such as motor generator (MG) torque, engine torque, battery voltage and the like change in association with each other. Therefore, if such an operation can be reproduced by the HILS system, it is possible to perform ECU debugging and disconnection inspection in a state closer to the actual machine.

  Therefore, in the second embodiment, ECU debugging and disconnection inspection are performed in the HILS system 60. The HILS system 60 is configured as a simulator that can be processed by a plurality of ECUs. Specifically, ECU processing data for each model is stored in the shared memory 62, so that the calculation results of other models can be read freely. As a result, it is possible to synchronize with the operation of other ECUs, and it is possible to execute a simulation closer to the actual machine.

[Specific Processing in Second Embodiment]
Next, with reference to FIG. 7, the specific content of the process performed in this Embodiment is demonstrated. FIG. 7 is a flowchart of a routine for performing a disconnection inspection using the HILS system 60.

  In the routine shown in FIG. 7, first, the driving conditions of the vehicle are input (step 200). Next, a disconnection pattern is input (step 202). Here, specifically, the same processing as step 100 shown in FIG. 4 is executed.

  Next, calculation of the entire vehicle model is executed (step 204). Each model requires a calculation result in another model. Here, specifically, the calculation result of each model is stored in the shared memory 62. Each model calculates the pseudo sensor signal while reading out the calculation results of the other models as necessary and synchronizing them. Thus, the calculation of the entire model of the vehicle is executed by the ECU of each model sharing the calculation result.

  Next, a disconnection operation is performed based on the disconnection pattern input in step 202 (step 206). Next, the calculated value of each ECU 50 at the time of disconnection execution in step 206 is taken into each PC 20 (step 208). Next, the calculated value of each model at the time of disconnection execution in step 206 is taken into each PC 20 (step 210). Here, specifically, processing similar to steps 100, 106, and 108 shown in FIG. 4 is executed for each model.

  In the routine shown in FIG. 7, next, the inspection data is inspected (step 212). Here, specifically, comparison verification between the calculated values of ECU 50 and model calculated values taken in steps 208 and 210 and a database stored in PC 20 is performed. As a result, debugging of the ECU 50 is executed, and a disconnection inspection for verifying the behavior and operation of the vehicle at the time of disconnection is executed. The inspection result in each model is taken into the host PC 64. The host PC 64 integrates the inspection results and outputs the inspection results for the entire vehicle.

  As described above, according to the second embodiment, the HILS system 60 having a plurality of models can perform a simulation that is closer to a real machine, so that it is possible to accurately realize a disconnection pattern that is difficult to achieve manually. Can do. Thereby, the reduction of the man-hour required for a disconnection test | inspection and the improvement of an inspection precision can be aimed at.

  In addition, the disconnection inspection can acquire inspection data based on operating conditions and disconnection patterns that are difficult to reproduce in an actual machine, so that the ECU 50 can be debugged efficiently.

  By the way, in Embodiment 2 mentioned above, in the HILS system 60 provided with the engine model 14a, the motor model 14b, and the battery model 14c, it is supposed that the simulation of the whole vehicle is performed and a disconnection test and ECU debugging are performed. However, the model included in the HILS system 60 is not limited to this. That is, for example, a configuration including a model such as a brake model may be provided, and a more detailed vehicle simulation may be executed.

  Moreover, in Embodiment 2 mentioned above, it is supposed that the disconnection / connection of the signal which flows through the wire harness 16 is controlled by turning on / off the relay inside the disconnection box 18, but these transmission / reception signals are disconnected. The method is not limited to this. That is, the disconnection state may be formed by restricting the output or input of a predetermined signal in each model or each ECU.

  In the second embodiment described above, the HILS system 60 is the simulator according to the sixth invention, the HILS systems 10a, 10b and 10c are the model simulator according to the sixth invention, and the shared memory 62 is the sixth simulator. This corresponds to the storage means in the present invention. Further, the “pseudo sensor signal generating means” according to the sixth aspect of the present invention is realized by the ECU 50a, 50b, 50c executing the processing of step 204 described above.

Embodiment 3 FIG.
[Features of Embodiment 3]
Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 8 is a diagram for explaining a system configuration according to the third embodiment of the present invention. In FIG. 8, the same parts as those in the HILS system shown in FIG. 5 are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.

  As shown in FIG. 8, the system 70 of the third embodiment is configured as a VRS (Virtual and Real Simulation) system. Specifically, the VRS system 70 includes an actual vehicle 72 as an actual hybrid vehicle. The actual vehicle 72 includes an engine 74, a motor 76, and a battery 78. That is, instead of the engine model 14a, the motor model 14b, and the battery model 14c shown in FIG. 5, an actual engine 74, motor 76, and battery 78 are connected to the VRS system 70.

  In the third embodiment, when the driving conditions of the actual vehicle 72 and the disconnection pattern as the inspection conditions are input to each PC 20, the engine 74, the motor 76, and the battery 78 are actually operated based on the supplied driving conditions. Driven by. Specifically, the engine 74 performs the same function as the engine model 14a of the HILS system 60 shown in FIG. Similarly, the motor 76 and the battery 78 perform the same functions as the motor model 14b and the battery model 14c shown in FIG. When a desired driving condition is reproduced by the actual vehicle 72, the disconnection process of the wire harness 16 is executed in the disconnection box 18 based on the disconnection pattern set in synchronization with the driving condition. Thereby, without using each model in the HILS system 60, it is possible to accurately execute the disconnection inspection and the debugging of the ECU.

  By the way, in Embodiment 3 mentioned above, in the VRS system 70 provided with the engine 74, the motor 76, and the battery 78, it is supposed that the simulation of the whole vehicle is performed, and a disconnection inspection and ECU debugging are performed. The actual machine included in the VRS system 70 is not limited to this. That is, for example, it may be configured to further include another actual machine such as a brake, and a more detailed vehicle simulation may be executed.

It is a figure for demonstrating the structure of the HILS system of Embodiment 1 of this invention. It is a figure for demonstrating the simulation operation | movement performed in the HILS system of Embodiment 1 of this invention. It is a figure for demonstrating the disconnection test | inspection performed in Embodiment 1 of this invention. It is a flowchart of the routine performed in Embodiment 1 of the present invention. It is a figure for demonstrating the structure of the HILS system of Embodiment 2 of this invention. It is a figure which shows an example of the sensor signal and drive signal in the real machine of a hybrid vehicle. It is a flowchart of the routine performed in Embodiment 2 of this invention. It is a figure for demonstrating the structure of the VRS system of Embodiment 3 of this invention.

Explanation of symbols

10 HILS (Hardware In the Loop Simulation) System 12 Driver Model 14 Engine Model 18 Disconnection Box 16 Wire Harness 20 HILS PC
50 ECU (Electronic Control Unit)
60 HILS system 14a engine model 14b motor model 14c battery model 50a EFI-ECU
50b MG-ECU
50c Bat-ECU
62 Shared memory 64 Host PC
70 VRS (Virtual and Real Simulation) System 72 Actual Car 74 Engine 76 Motor 78 Battery

Claims (7)

An automatic inspection device for an electronic control unit that takes in a sensor signal and outputs an actuator drive signal,
Driving pattern generating means for outputting a signal corresponding to the prescribed driving pattern using hardware resources of a computer;
A simulator that generates, as a pseudo sensor signal, a signal equivalent to a sensor signal that is generated by receiving the actuator drive signal when an actual machine that is an original control target of the electronic control unit operates along the operation pattern; ,
A signal exchanging means for supplying the pseudo sensor signal to the electronic control unit, and for receiving a drive signal of the actuator emitted from the electronic control unit;
Disconnection pattern setting means for setting a disconnection pattern of an exchange signal transmitted and received by the signal exchange means;
Based on the disconnection pattern, disconnection means for disconnecting the exchange signal;
Inspecting means for inspecting the processing result in the electronic control unit and / or the simulator using hardware resources of the computer when the transmission / reception signal is disconnected by the disconnection means,
An automatic inspection device for an electronic control unit comprising:   The automatic inspection device for an electronic control unit according to claim 1, wherein the disconnection pattern setting means sets in synchronization with the operation pattern.   The automatic inspection device for an electronic control unit according to claim 1 or 2, wherein the disconnection pattern setting means sets a disconnection period in the disconnection pattern to a predetermined period or more.   4. The electronic control unit automatic inspection apparatus according to claim 1, wherein the inspection unit executes debugging of the electronic control unit. The signal transmission / reception means is a wire harness for conducting the electronic control unit and the simulator,
The disconnection means is
A relay interposed in the wire harness;
Control means for controlling the relay based on the disconnection pattern;
5. The electronic control unit automatic inspection device according to claim 1, comprising: The simulator
A plurality of model simulators simulating the vehicle's controlled objects;
Storage means for storing the processing results in the model simulator in a readable state;
A pseudo sensor signal generating means for generating the pseudo sensor signal in synchronization with a processing result of another model simulator stored in the storage means;
The electronic control unit automatic inspection device according to claim 1, comprising: A signal equivalent to the sensor signal generated by receiving the actuator drive signal when the actual control target of the electronic control unit that takes in the sensor signal and outputs the actuator drive signal operates along the operation pattern. Is generated as a pseudo sensor signal, and an inspection method for an electronic control unit including a simulator that receives a drive signal of an actuator emitted from the electronic control unit,
Outputting a signal corresponding to a prescribed driving pattern to the simulator using computer hardware resources;
Outputting a signal corresponding to the disconnection pattern set in synchronization with the operation pattern to the simulator using hardware resources of a computer;
A step of disconnecting a transmission / reception signal transmitted / received between the simulator and the electronic control unit along the disconnection pattern;
Inspecting the processing result in the electronic control unit and / or the simulator using hardware resources of a computer when the step of disconnecting the transmission / reception signal is performed;
A method for automatically inspecting an electronic control unit.

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