Electronic control device

Abstract

An electronic control device (1) has a connector (3) mounted on a control board (2), a signal processing means (4) mounted on the control board (2), and a signal processing line (5) connecting the connector (3) and the signal processing means (4); the signal processing line (5) comprises two or more individual signal wiring lines (PTC1, PTC2, PTC3, PTC4); the signal processing means (4) performs a signal assignment to the two or more individual signal wiring lines (PTC1, PTC2, PTC3, PTC4).

Description

Technical field

[0001] The present invention relates to an electronic control device. Background of the invention

[0002] In recent years, a large number of electronic control devices have been integrated into motor vehicles. Furthermore, the electrification of motor vehicles, for example, hybrid and electric vehicles, is being driven forward, and there are a large number of new car manufacturers. Accordingly, with regard to devices for converting electrical energy to power an electric motor, for example, compatibility across a wide range of manufacturers is required, as well as a reduction in development time, cost reduction, and similar factors.

[0003] For example, a conventional control device with an electronic control switch, disclosed in patent document 1, is configured to have two or more electrical cables that can be changed by an electrical switching action by a switching device, wherein a connector has two or more terminals and is able to connect one end of each of the electrical cables to an external device, a control device for controlling the switch control device, and a memory control board for providing switch control data to the control device, such that at least one of the two or more terminals is used to rewrite the switch control data to be stored in the memory device. [Reference to prior art][Patent document]

[0004] [Patent document 1] Published Japanese patent application no. H11-26095 Summary of the invention; Problem statement of the invention

[0005] The conventional device disclosed in patent document 1 performs switching control of multi-channel circuit wiring lines by using at least one of the two or more terminals when rewriting the switching control data to be stored in the storage device, so that the signal mapping of connector pins to signal wiring lines can be changed without changing the external shape of the connector; however, in the case where the degree of flexibility in the signal mapping of the connector pins to the signal wiring lines is increased, or in the case where the number of input / output signal pins of the connector and the number of signal wiring lines are large, the number of switching devices increases; therefore, there were problems with increasing the external size of the connector and increasing manufacturing costs.

[0006] The present invention is intended to disclose a technology for solving the aforementioned problems; the object of which is to provide an electronic control system that achieves compatibility between diversity and universality. Means of solving the task

[0007] An electronic control device disclosed in the present invention is configured to control a control object and comprises a control board, a connector mounted on the control board and a signal processing means mounted on the control board and electrically connected to the connector via a signal wiring line provided on the control board; the electronic control device is characterized in this respect. that an input / output signal intended for the connector is applied to the signal wiring line and that the signal processing device performs a signal assignment in which the input / output signal is assigned to the signal wiring line. Advantage of the invention

[0008] The present invention makes it possible to capture an electronic control device that achieves compatibility between diversity and universality. Brief description of the drawings Fig. Figure 1 is a block diagram representing the configuration of an electronic control device according to embodiment 1; Fig. 2A is a block diagram that represents the configuration of a first exemplary variant in the electronic control device according to embodiment 1; Fig. 2B is a block diagram that represents the configuration of a second variant in the electronic control device according to embodiment 1; Fig. 2C is a block diagram that represents the configuration of a third variant in the electronic control device according to embodiment 1; Fig. Figure 3A is a circuit diagram that illustrates an example of an exogenous noise protection circuit in the electronic control device according to embodiment 1; Fig. Figure 3B is a circuit diagram that represents another example of the exogenous noise protection circuit in the electronic control board according to embodiment 1; Fig. Figure 4 is a flowchart illustrating an example of signal assignment processing by a signal processing means in the electronic control device according to embodiment 1; Fig. Figure 5 is a block diagram illustrating the configuration of an electronic control device according to embodiment 2; Fig. Figure 6 is a flowchart illustrating an example of signal assignment change processing by a signal processing means in the electronic control device according to embodiment 2; Fig. Figure 7 is a timing diagram that illustrates an example of signal assignment change processing by the signal processing means in the electronic control device according to embodiment 2; Fig. Figure 8 is a flowchart illustrating an example of signal assignment processing by a signal processing means in an electronic control device according to embodiment 3; Fig. Figure 9 is a timing diagram that illustrates an example of signal assignment change processing by the signal processing means in the electronic control device according to embodiment 3; Fig. Figure 10 is a flowchart illustrating examples of the processing of the change in signal mapping and the output of the fault condition signal by the signal processing means in the electronic control device according to embodiment 3; Fig. Figure 11 is a timing diagram illustrating an example of signal mapping processing by the signal processing means during a transition period in which a power source starts up in the electronic control device according to embodiment 3; and Fig. Figure 12 is a block diagram showing an example of the hardware configuration of each of the signal processing means and of a control calculation processing means in the electronic control device according to each of embodiments 1 to 3. Embodiments of the invention, embodiment 1.

[0009] Fig. Figure 1 is a block diagram illustrating the configuration of an electronic control device according to embodiment 1. Fig. The electronic control device 1 comprises a control board 2, a connector 3, and a signal processing unit 4. The connector 3 and the signal processing unit 4 are electronic components mounted on the control board 2; they are electrically connected to each other via a signal wiring line 5, which is provided on the control board 2, for example, by printing. In the illustrated example, the signal wiring line 5 comprises four individual signal wiring lines PTC1, PTC2, PTC3, and PTC4. Furthermore, each of the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 is not limited to a single line but can collectively comprise two or more wiring lines, for example, differential signal wiring lines and parallel signal wiring lines.

[0010] Connector 3 has a function of transmitting input / output signals between signal processing means 4 and an external device outside the electronic control device 1, and a function of transmitting input / output signals between signal processing means 4 and other circuit boards or components within the electronic control device 1; connector 3 is provided with two or more connector pins. Furthermore, in Fig. 1. The external devices, the internal other circuit boards or the internal components to be connected with connector 3 have been omitted.

[0011] It may be permissible for two or more connectors 3 to be attached to the control board 2. Fig. 2A is a block diagram that represents the configuration of a first variant of an example in the electronic control device according to embodiment 1; Fig. 2A represents the case where two connectors are provided. As in Fig. As shown in Figure 2A, a first connector 31 and a second connector 32 are attached to the control board 2.

[0012] The first connector 31 is electrically connected to an additional control device 6, located outside the electronic control device 1, via two or more signal wiring lines 51. The first connector 31 and the signal processing means 4 are electrically connected to each other via a signal wiring line 52, which is provided on the control board 2, for example, by printing. The first connector 31 is used for signal transmission between the additional control device 6 and the signal processing means 4.

[0013] The second connector 32 is electrically connected to an additional circuit board 7, which is provided within the electronic control device 1, via two or more signal wiring lines 53. The first connector 32 and the signal processing means 4 are electrically connected to each other via a signal wiring line 54, which is provided on the control board 2, for example, by printing. The second connector 32 serves to transmit signals between the additional circuit board 7 and the signal processing means 4. Each of the signal wiring lines 51, 52, 53, and 54 comprises two or more individual signal wires.

[0014] Fig. Figure 2B is a block diagram that represents the configuration of a second variant of an example in the electronic control device according to embodiment 1; Fig. 2B represents the case where two connectors are provided. As in Fig. As shown in Figure 2B, the first connector 31 and the second connector 32 are mounted on the control board 2.

[0015] The first connector 31 is electrically connected to a first additional control device 61, located outside the electronic control device 1, via the signal wiring line 51. The first connector 31 and the signal processing means 4 are electrically connected to each other via the signal wiring line 52 provided on the control board 2, for example by printing. The first connector 31 is used for signal transmission between the first additional control device 61 and the signal processing means 4.

[0016] The second connector 32 is electrically connected to a second additional control device 62, which is provided outside the electronic control device 1, via the signal wiring line 53. The first connector 32 and the signal processing means 4 are electrically connected to each other via the signal wiring line 54 provided on the control board 2, for example by printing. The second connector 32 serves to transmit signals between the second additional control device 62 and the signal processing means 4. Each of the signal wiring lines 51, 52, 53 and 54 comprises two or more individual signal wires.

[0017] Fig. 2C is a block diagram that represents the configuration of a third embodiment of the electronic control device according to embodiment 1; Fig. 2C represents the case where two connectors are provided. As in Fig. As shown in Figure 2C, the first connector 31 and the second connector 32 are mounted on the control board 2.

[0018] The first connector 31 is electrically connected to the additional control board 6 located outside the electronic control device 1 via the signal wiring line 51. The first connector 31 and the signal processing means 4 are electrically connected to each other via the signal wiring line 52 provided on the control board 2, for example by printing. The first connector 31 is used for signal transmission between the additional control device 6 and the signal processing means 4.

[0019] The second connector 32 is electrically connected via the signal wiring line 53 to a sensor device 8 located outside the electronic control device 1. The second connector 32 and the signal processing means 4 are electrically connected to each other via the signal wiring line 54, which is provided on the control board 2, for example, by printing. The second connector 32 serves to transmit signals between the sensor device 8 and the signal processing means 4. Each of the signal wiring lines 51, 52, 53, and 54 comprises two or more individual signal wires.

[0020] In the preceding Fig. 1 An exogenous noise protection circuit is provided in the signal wiring line 5 between the connector 3 and the signal processing device 4. The exogenous noise protection circuit has a circuit configuration that, for example, Fig. 3A or Fig. 3B is shown.

[0021] That means, Fig. Figure 3A is a circuit diagram illustrating an example of an exogenous noise protection circuit in the electronic control board according to embodiment 1. Fig. 3A is an exogenous noise protection circuit 9, a T-filter comprising a first resistor 91, a second resistor 92, and a capacitor 93. Alternatively, the exogenous noise protection circuit 9 can be a three-terminal capacitor performing the same interference suppression function.

[0022] Fig. Figure 3B is a circuit diagram that presents a further example of the exogenous noise protection circuit in the electronic control device according to embodiment 1. Fig. 3B is the exogenous noise protection circuit 9 a π-filter comprising a resistor 90, a first capacitor 931 and a second capacitor 932.

[0023] As in the Fig. 3A and Fig. As shown in Figure 3B, the filter circuit is an exogenous noise protection circuit 9 with at least one capacitor, a two-sided symmetrical filter of the T-type or π-type, and can be connected to the signal wiring line 5 in Fig. 1 can be applied regardless of the types of input / output signals flowing in the signal wiring line 5, and can readily standardize circuits and change the signal mapping of the signal wiring lines 5. More precisely, the exogenous noise protection circuit is provided in each of two or more individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 that are included in the signal wiring line 5.

[0024] Furthermore, the filter circuit, such as the exogenous noise protection circuit, which is found in the Fig. 3A and Fig. 3B is shown, also in the signal wiring lines 51, 52, 53 and 54 in the preceding Fig. 2B and Fig. 2C is provided and can easily implement a standardization of the circuits and a change in the signal assignment of each of the signal wiring lines 51, 52, 53 and 54.

[0025] Next, the operation of the electronic control device according to embodiment 1, which is described in Fig. Figure 1 is shown and explained. The signal processing means 4 has a signal assignment function for assigning input / output signals of the connector 3 to the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4, which are contained in the signal wiring line 5 connected to the connector 3, and a signal assignment modification function for changing the signal assignment in accordance with the respective states of the input / output signals that have already been assigned to the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4.

[0026] Specifically, the signal processing device 4 is configured, for example, with a PLD (Programmable Logic Device), an ASIC (Application Specific Integrated Circuit), a microcomputer, an MCU (Micro Controller Unit), or the like; the signal processing device 4 is in each of the above Fig. 2A, Fig. 2B and Fig. The embodiments shown in 2C are configured identically.

[0027] Next, the signal mapping processing by the signal processing means 4 is explained, which is applied to the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4 included in the signal wiring line 5. Fig. Figure 4 is a flowchart illustrating an example of signal assignment processing by the signal processing means in the electronic control device according to embodiment 1. Fig. In step S100, the signal processing device 4 reads predetermined types and numbers of input / output signals. For example, the types and numbers of input / output signals are read from storage media located inside and outside a PLD, ASIC, microcomputer, MCU, or the like, which are designated as signal processing devices 4.

[0028] In step S101, the signal processing unit 4 assigns the input / output signals to the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4 and then terminates the processing.

[0029] The limitation (the upper limit) such as the number of mappings when assigning input / output signals to the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 is read, for example, from storage media provided inside or outside, or inside and outside, a PLD, ASIC, or the like, which are included in the signal processing equipment 4. Furthermore, the recording of the types and number of input / output signals in the storage media is carried out during a product manufacturing process; different descriptions are defined depending on the customer and model.

[0030] The signal processing means 4 is configured to be able to change the signal assignment to the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4 in accordance with the operating state of the electronic control device 1, after it has assigned the predetermined input / output signals to the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4 included in the connector 3, as described above.

[0031] For example, the description and priority level of a signal, such as an error status signal indicating an operational irregularity, are read in advance from the aforementioned storage media; then, when an irregularity occurs in the electronic control device 1, the assignment of a signal to one of the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 can be changed to the assignment of an error signal whose priority level is higher than that of any of the input / output signals. Furthermore, this also applies to each of the [unclear] in the Fig. 2A, Fig. 2B and Fig. Variant examples shown in 2C.

[0032] As described above, the electronic device according to embodiment 1 comprises a control board, a connector mounted on the control board, and a signal processing unit mounted on the control board. It can arbitrarily set the signal mapping to be applied to the signal wiring lines between the connector and the signal processing unit, for example, according to the type of motor vehicle, device to be controlled, or the like. Furthermore, even if the boards and components comprising the connector and the mounting are standardized, the signal mapping can be freely set without having to change the signal wiring lines. This enables compatibility between diversity and universality, reduces development time, lowers costs, and the like.

[0033] Furthermore, since it is a symmetrical filter circuit that includes at least one capacitor, the exogenous noise protection circuit provided in each of the signal wiring lines between the connector and the signal processing equipment can be applied to each of the signal wiring lines regardless of the type of input / output signal; thus, the standardization of circuits and the change of signal assignment by the signal processing equipment can be easily implemented.

[0034] Since the signal processing means are configured to be able to change the mapping of the input / output signals to the respective signal wiring lines in order to assign signals whose priority levels are higher than those of the input / output signals, the signal processing means can, for example, respond quickly to a change in the state of the electronic control device; thus, the convenience and robustness of the entire system, including the electronic control device and its exterior, can be maintained. Design 2.

[0035] Next, an electronic control device according to embodiment 2 is described. The electronic control device according to embodiment 1 is configured to determine and modify the signal assignment to the signal processing means between the connector and the signal processing means; the electronic control device according to embodiment 2 further comprises a control calculation processing device mounted on the control board and configured to modify the signal assignment to the signal processing means between the connector and the signal processing means, or to the signal processing means, based on an approval by the control calculation processing device.

[0036] Fig. Figure 5 is a block diagram illustrating the configuration of the electronic control device according to embodiment 2. Fig. 5 has an electronic control device 1, a control board 2, a connector 3, a signal processing device 4, and a control calculation processing device 40. As with each of the in Fig. 2A, Fig. 2B and Fig. In the variant examples shown in Figure 2C for the electronic control device according to the above embodiment 1, two or more connectors 3 can be attached to the control board 2.

[0037] Each of the signal processing devices 4 and the control calculation processing device 40 is an electronic component mounted on the control board 2. The signal processing devices 4 and the control calculation processing device 40 are electrically connected to each other via a signal wiring line 50, which is provided on the control board 2, for example, by printing. The signal wiring line 50 comprises two or more individual signal wires.

[0038] Furthermore, the control calculation processing device 40 has the function of performing a predetermined calculation in accordance with input / output signals and outputting the result of the calculation as an output signal to the signal wiring line 50. In particular, the control calculation processing device 40 is configured, for example, with a PLD, an ASIC, a microcomputer, an MCU, or the like.

[0039] The connector 3 and the signal processing device 4 are each electronic components mounted on the control board 2; they are electrically connected to each other via the signal wiring line 5 provided on the control board 2, for example by printing. As in embodiment 1, the signal wiring line 5 comprises two or more individual signal wires. As in embodiment 1, the connector 3 has a function for transmitting signals between the signal processing devices 4 and an external device outside the electronic control board 1 and a function for transmitting signals between the signal processing devices 4 and other boards or components within the electronic control board 1.

[0040] The individual signal wiring lines PTC1, PTC2, PTC3, and PTC4, which are included in signal wiring line 5 between connector 3 and the signal processing devices 4, correspond to the individual signal wiring lines PTC10, PTC20, PTC30, and PTC40, which are included in signal wiring line 50 between the control calculation processing devices 40 and the signal processing devices 4. The same signals are assigned to each of the individual signal wiring lines PTC1 and PTC10, PTC2 and PTC20, PTC3 and PTC30, and PTC4 and PTC40. Furthermore, an exogenous noise protection circuit is provided in each of the individual signal wires PTC1, PTC2, PTC3, and PTC4 between connector 3 and the signal processing devices 4. The exogenous noise protection circuit has a circuit configuration that is used, for example, in Fig. 3A or Fig. Figure 3B is shown. Furthermore, each of the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4 and each of the individual signal wiring lines PTC10, PTC20, PTC30 and PTC40 is not limited to a single line, but can jointly comprise two or more wiring lines, for example, differential signal wiring lines and parallel signal wiring lines.

[0041] The signal processing device 4 has the function of assigning predetermined input / output signals to the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4, which are contained in the signal wiring line 5 between the connector 3 and the signal processing device 4, and to the individual signal wiring lines PTC10, PTC20, PTC30, and PTC40, which are contained in the signal wiring line 50 between the control calculation processing device 40 and the signal processing device 4. The signal assignment processing by the signal processing device 4 to the signal wiring lines 5 and 50 is carried out in the same manner as in the Fig. The flowchart shown in section 4 for the electronic control device according to the above embodiment 1 was carried out.

[0042] If, during a transition period in which the power source of the electronic control device 1 is activated, the signal processing means 4 are started after the start of the control calculation processing means 40, the signal processing means 4 can also perform the signal allocation taking into account the types of predetermined input / output signals, their number and the like by using the storage media provided in the control calculation processing means 40; thus, safety measures can be implemented along with a reduction in the number of components.

[0043] Furthermore, the electronic control device according to embodiment 2, as described below, allows the signal mapping to be freely changed without altering the arrangement of the signal wiring lines and the like, even if, in the interest of compatibility between diversity and universality, which is what an electronic control device is about, and in order to reduce development time and costs, the control boards and components to be mounted, including the connectors, are standardized.

[0044] The signal processing means 4 has a signal assignment change function for changing the signal assignment to the individual signal wiring lines PTC10, PTC20, PTC30 and PTC40, which are included in the signal wiring line 50, in cooperation with the control calculation processing means 40 and in accordance with the states of the input / output signals. Fig. Figure 6 is a flowchart illustrating an example of signal assignment change processing by the signal processing means in the electronic control device according to embodiment 2.

[0045] In Fig. In step S200, signal processing unit 4 monitors the states of the input / output signals between the control calculation unit 40 and itself. More specifically, signal processing unit 4 determines, for example, whether any of the input / output signals are fixed due to a wire break in the corresponding individual signal wiring lines PTC10, PTC20, PTC30, and PTC40 belonging to signal wiring line 5. If an irregularity in the input / output signals is detected in step S200, step S201 follows.

[0046] In step S201, the signal processing means 4 takes into account the priority level that was predefined for the input / output signal in which an irregularity was detected; in the case where the input / output signal in which the irregularity was detected is a signal with a priority level higher than that of any of the other input / output signals with regard to the realization of the function of the electronic control device 1, the signal processing means 4 considers changing the signal assignment in which another input / output signal with a priority level lower than that of the input / output signal in which the irregularity was detected is assigned to the individual signal wiring line to the signal assignment in which the input / output signal in which the irregularity was detected and which has a higher priority level is assigned to the preceding individual signal wiring line.This means that the signal processing device 4 determines whether the input / output signal meets a signal assignment change condition or not.

[0047] If step S201 determines that the priority level of the input / output signal in which the irregularity was detected is higher than that of any of the other input / output signals, the signal mapping change condition is determined to be met (YES); then step S202 follows step S201. Conversely, if the priority level of the input / output signal in which the irregularity was detected is lower than that of any of the other input / output signals, the signal mapping change condition is determined to be not met (NO); then step S200 is resumed, and the processing in and after step S200 is repeated.

[0048] In step S202, the signal processing device 4 transmits the input / output signal in which the irregularity was detected and the change in the signal assignment to the control calculation processing device 40 by sending and receiving a specific signal in serial communication or the like, to query whether the signal assignment can be changed or not.

[0049] Next, step S203 determines whether permission to change the signal assignment has been granted. If permission to change the signal assignment has been granted (YES), step S203 is followed by step S204, in which the signal assignment is changed; then processing is terminated. Conversely, if step S203 determines that permission to change the signal assignment has not been granted (NO), step S200 is resumed, and the processing in and after step S200 is repeated.

[0050] Fig. Figure 7 is a timing diagram illustrating an example of a change in signal assignment by the signal processing means in the electronic device according to embodiment 2; the ordinate denotes the individual signal wiring lines PTC10 and PTC20 and a specific signal SG3 in a specific communication, such as serial communication between the signal processing means 4 and the control calculation processing means 40; the abscissa denotes time points.

[0051] Fig. Figure 7 describes the case where the single signal wiring line PTC10 fails, for example due to a wire break or similar cause, and then the signal voltage level of an input / output signal SG1, which is assigned to the single signal wiring line PTC10, is set to "0". An input / output signal SG2 is assigned to the single signal line PTC20. Furthermore, it is assumed that the priority level of the input / output signal SG1 is higher than that of the input / output signal SG2.

[0052] Assume that the signal processing device 4 detects at time T1 that the level of the input / output signal SG1 assigned to the single signal wiring line PTC10 is fixed at "0". The fixing of the voltage level of the input / output signal SG1 can be detected, for example, if the voltage level does not change during a predetermined period of time, or by comparison with a voltage level change of another input / output signal.

[0053] Next, at time T2, signal processing device 4 uses the specific signal SG3 in a specific communication, for example, a serial communication with control processing device 40, to request whether the signal assignment can be changed. In response to this request, control processing device 40 informs signal processing device 4 that it is permitted to change the signal assignment to the single signal wiring line PTC20 using the specific signal SG3, because the priority level of input / output signal SG1 is higher than that of input / output signal SG2, which is assigned to the solid single signal wiring line PTC20.

[0054] At time T3, the signal processing device 4, which has received permission to change the signal assignment from the control calculation processing device 40, performs a signal assignment change in which the input / output signal SG1 is assigned to the individual signal wiring line PTC20 instead of the input / output signal SG2. As described above, the individual signal wiring lines PTC10, PTC20, PTC30, and PTC40 contained in signal wiring line 50 correspond to the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 contained in signal wiring line 5.Since the signal processing device 4 does not change the signal assignment to the individual signal wiring lines PTC1 and PTC2 contained in the signal wiring line 5 between the connector 3 and the signal processing device 4 at time T3, the input / output signal SG1 is continuously transmitted through the individual signal wiring line PTC1 and the transmission of the input / output signal SG2, which has a low priority level, is canceled.

[0055] As described above, the electronic control device according to embodiment 2 has the connector 3, the signal processing means 4 and the control calculation processing means 40 on the control board 2 and can, through the interaction of the signal processing means 4 and the control calculation processing means 40, change the signal assignment to the signal wiring line 5 between the connector and the signal processing means as desired; this makes it possible that even with standardized control boards and components that include and are mounted on connectors, the signal assignment to the signal wiring line can be freely changed without changing the signal wiring lines; this allows for compatibility between diversity and universality, a reduction in the development time for the device, cost reduction and the like.

[0056] If, during a transition period in which the power source of the electronic control device 1 is activated, the signal processing means 4 are started after the start of the control calculation processing means 40, the signal processing means 4 can also perform the signal assignment while taking into account the types of input / output signals, their number and similar information, which are stored using the storage media provided in the control calculation processing means 40; thus, safety measures can be implemented along with a reduction in the number of components.

[0057] Since the signal processing means 4 are configured on the basis of the signal processing line 50 between the control calculation processing means 40 and themselves in such a way that they change the signal assignment to a signal processing line in accordance with the state of an input / output signal and in comparison with a predetermined priority order, it is possible, for example, that even if an irregularity of the signal occurs, the operation of the electronic control device is continued by changing the signal assignment to the signal processing line;This makes it possible that even if, in the interest of compatibility between diversity and universality, which is the problem of an electronic control device, shortening product development time and reducing costs, circuit boards and components that include connectors and are assembled are standardized, the signal assignment to a signal wiring line can be arbitrarily changed without changing the arrangement of the signal wiring lines. Design 3.

[0058] Next, an electronic control device according to embodiment 3 is described. The electronic control device according to embodiment 2 has the control calculation processing means on the control board and changes the signal assignment to the signal processing line between the connector and the signal processing means such that the signal assignment to the signal processing line between the control calculation processing means and the signal processing means is changed in accordance with the state of an input / output signal; however, the electronic control device according to embodiment 3 changes the input / output signal assignment to the signal processing line between the signal processing means and the connector in accordance with the state of the control calculation processing means.The configuration of the electronic control device according to embodiment 3 is the same as that of the electronic control device according to embodiment 2.

[0059] In Fig. The signal processing device 4 has the function of monitoring the state of the control calculation processing device 40. This monitoring by the signal processing device 4 is based on a specific signal that is transmitted and received between the signal processing device 4 and the control calculation processing device 40 via the signal wiring line 50. Examples of such specific signals include a watchdog timer signal, a query signal, a response signal in serial communication, or similar signals.

[0060] Furthermore, the signal processing device 4 has the function of changing the signal assignment to the signal wiring line 5 between the signal processing device 4 and the connector 3 in accordance with the state of the control calculation processing device 40. Fig. Figure 8 is a flowchart illustrating an example of signal assignment processing by the signal processing means in the electronic control device according to embodiment 3. Fig. In step S300, the signal processing device 4 transmits and receives a specific signal between the control processing device 40 and itself via the signal wiring line 50. As described above, the specific signal(s) used could be, for example, a watchdog timer signal, a query signal, a response signal in serial communication, or similar.

[0061] Next, in step S301, the signal processing means 4, based on the result of the transmission and reception of the specific signal between the tax calculation processing means 40 and itself, determines the operating state of the tax calculation processing means 40; in the case where an operational irregularity in the tax calculation processing means 40 is detected (YES), step S301 is followed by step S302; in the case where no operational irregularity in the tax calculation processing means 40 is detected (NO), step S300 is resumed and then the processing in and after step S300 is repeated.

[0062] In step S302, the signal processing device 4 changes the signal assignment such that instead of an input / output signal that was assigned to at least one of the individual signal wiring lines PTC1, PTC2, PTC3 and PTC4 of the signal wiring line 5 between the signal processing device 4 and the connector 3, an error status signal is assigned; then the processing is terminated.

[0063] To implement the signal assignment change in step S302, it is conceivable, for example, that an error status signal is output to at least one of the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 of signal wiring line 5 via LIN (Local Interconnect Network) communication, CAN (Controller Area Network) communication, or the like. Furthermore, each of the individual signal wiring lines PTC1, PTC2, PTC3, and PTC4 is not limited to a single line but can jointly comprise two or more wiring lines, for example, differential signal wiring lines and parallel signal wiring lines.

[0064] Particularly in the case of CAN communication, if the control calculation processing device 40 does not respond, a request signal from a higher-level control board outside the electronic control board 1 leads to a high load on the CAN communication line (bus); however, if the signal processing device 4 outputs the fault status signal early instead of the control calculation processing device 40, not only is the high load on the CAN communication line suppressed, but the higher-level control board can also accelerate a fail-safe action; thus, the reliability of the entire system can be increased.

[0065] Fig. Figure 9 is a timing diagram illustrating an example of signal assignment change processing by the signal processing means in the electronic control device according to embodiment 3; the ordinate denotes a specific signal SG4 in specific communication between the signal processing means 4 and the connector 3 and the single signal wiring line PTC1, which is included in the signal wiring line 5; the abscissa denotes time points.

[0066] In Fig. 9 The control calculation processing device 40 outputs a monitoring timer signal for the specific signal SG4, which is contained in the signal wiring line 50 between the signal processing device 4 and itself; the signal processing device 4 detects an operational irregularity in the control calculation processing device 40 by monitoring the specific signal SG4 including the aforementioned monitoring timer signal.

[0067] If an operational irregularity is detected in the control calculation processing unit 40, the signal processing unit 4 changes the signal assignment to the individual signal wiring line PTC1, which is one of the individual signal wiring lines included in the signal wiring line 5 between connector 3 and itself. In other words, the signal processing unit 4 changes the signal assignment to the individual signal wiring line PTC1 such that instead of the input / output signal SG1 that was assigned to the individual signal wiring line PTC1, an error status signal ERRS, indicating an operational irregularity in the control calculation processing unit, is assigned to it.

[0068] More precisely, to one in Fig. At time T1, as depicted in Figure 9, an operational irregularity occurs in the control calculation processing unit 40; then, the signal processing unit 4 determines that the voltage level of the specific signal SG4, including the watchdog timer signal, has been set to "0". Next, at time T2, the signal processing unit 4 changes the signal associated with the single signal wiring line PTC1, which is contained within the signal wiring line 5 between connector 3 and itself, from the input / output signal SG1 to the fault status signal ERRS, which indicates the operational irregularity in the control calculation processing unit, and then notifies other devices outside the electronic control unit 1 of the irregularity in the electronic control unit 1.

[0069] If, during a transition period in which the power source of the electronic control device 1 is activated, the signal processing means 4 are started before the control calculation processing means 40 start, the signal processing means 4 can also perform the signal assignment to the signal wiring line 5 between the connector 3 and themselves during the time before the control calculation processing means 40 start, in the case in which the control calculation processing means 40 do not input any specific signals, and can output the error status signal ERRS, which indicates operating state information, for example the fact that the electronic control device 1 is in a power source start sequence or in standby.

[0070] In particular, the control calculation processing unit 40, which is part of the functionality, has a long self-diagnostic time at startup, and shortening the startup time is difficult; therefore, the startup time of the entire control system, including the higher-level control board, can be shortened if the signal processing unit 4 outputs the fault status signal ERRS early instead of the control calculation processing unit 40.

[0071] Fig. Figure 10 is a flowchart illustrating examples of signal assignment change processing and fault condition signal output processing by the signal processing means in the electronic control board according to embodiment 3. The flowchart in Fig. Figure 10 represents an example of signal change processing in which, if during a transition period in which the power source of the electronic control device 1 is activated, the signal processing means 4 are started before the control calculation processing means 40 start, and in the case in which, during the time before the control calculation processing means 40 start, the control calculation processing means 40 do not input a specific signal SG4 into the signal processing means 4, the signal processing means 4 change the signal that is to be assigned to the signal wiring line 5 between the connector 3 and itself from the input / output signal SG1 to the fault status signal ERRS.

[0072] That means in step S310 in Fig. 10. The signal processing device 4 performs the transmission and reception of the specific signal SG4 between the control calculation processing device 40 and itself; then, step S310 is followed by step S311. In step S311, the signal processing device 4 determines whether or not there is an input of the specific signal SG4 from the control calculation processing device 40.

[0073] In the case where step S311 determines that there is no input of the specific signal SG4 (JA), step S311 is followed by step S312, in which the signal processing device 4 changes the signal assignment to the signal wiring line 5 between connector 3 and itself to output the fault status signal ERRS instead of the previous input / output signal SG1; then step S310 is resumed, and the processing in and after step S310 is repeated.

[0074] In contrast, if step S311 detects an input of the specific signal SG4 (NO), step S311 is followed by step S313, in which the signal processing means 4 changes the signal assignment to the signal wiring line 5 between connector 3 and itself to output a predetermined communication signal SXS instead of the previous fault status signal ERRS; then the processing is terminated.

[0075] Fig. Figure 11 is a timing diagram that represents an example of signal assignment processing by the signal processing means during a transition period in which the power source in the electronic control device according to embodiment 3 starts. Fig. Figure 11 describes the case in which the signal processing device 4 changes the signal assignment to the single signal wiring line PTC1, which is contained in the signal wiring line 5 between the connector 3 and itself. Furthermore, it describes Fig. 11 describes the case in which the signal processing means 4 monitor a watchdog timer signal that is input into the specific signal SG3, which is transmitted and received between the tax calculation processing means 40 and themselves, and then determine whether the tax calculation processing means 40 have been activated or not.

[0076] To one in Fig. At time T1 shown in Figure 11, the signal processing device 4 is activated before the control calculation processing device 40, detects that no watchdog timer signal is being input into the specific signal SG3, changes the signal to be assigned to the individual signal wiring line PTC1 from the original input / output signal to the fault status signal ERRS, and then outputs the fault status signal ERRS.

[0077] Next, at time T2, the signal processing device 4 detects that a watchdog timer signal with a predetermined pattern has been input into the specific signal SG3, and then changes the signal associated with the individual signal wiring line PTC1 from the fault status signal ERRS to the predetermined communication signal SXS. Due to the reception of the communication signal SXS, the other control devices subsequently operate correctly.

[0078] As described above, the electronic control device according to embodiment 3 comprises a control board and connector, a signal processing unit, and a control calculation unit mounted on the control board, and can arbitrarily change the signal assignment to be applied to the signal wiring lines between the connector and the signal processing unit; this makes it possible that, even if the boards and components comprising the connector and mounted on the control board are standardized, the signal assignment to the signal wiring lines can be freely changed without changing the signal wiring lines themselves; this enables compatibility between diversity and universality, reduces product development time, and lowers costs.

[0079] Furthermore, the signal processing device 4 monitors the operating state of the control calculation processing device 40; in the event that an irregularity is detected in the control calculation processing device 40, the signal processing device 4 changes the signal that is assigned to and output by the signal wiring line 5 between the connector 3 and itself into the fault condition signal, so that instead of the control calculation processing device 40, the signal processing device 4 can report the irregularity outside the electronic control device 1; therefore, the entire vehicle system can accelerate the fail-safe action and the reliability of the system can be increased.

[0080] Furthermore, the control calculation processing device 40 is provided, and during a transition period in which the power source of the electronic control device 1 is activated, the signal processing device 4 is started before the control calculation processing device 40; therefore, in the case where there is no input of the specific signal from the control calculation processing device 40 before the activation of the control calculation processing device 40, the signal processing device 4 can change the signal assignment to the signal wiring line 5 between the connector 3 and itself in order to output the fault status signal.

[0081] In particular, because the control calculation processing unit 40, which is part of the functionality, has an extended self-diagnostic time at startup, reducing the startup time is difficult; however, if the signal processing unit 4 outputs the fault status signal early instead of the control calculation processing unit 40, the startup time of the entire system, including the higher-level control board, can be reduced.

[0082] Fig. Figure 12 is a block diagram illustrating an example of the hardware configuration of each of the signal processing means and the control calculation means in the electronic control board according to each of embodiments 1 to 3. Each of the signal processing means 4 and the control calculation means 40 according to the present invention has a hardware configuration that is, for example, shown in Fig. 12 is shown. That is, in Fig.Figure 12 includes each of the signal processing means 4 and the control calculation processing means 40, comprising a processor 1001 and a storage device 1002. Although not shown, the storage device 1002 has a volatile storage device, such as random-access memory, and an auxiliary non-volatile storage device, such as flash memory. The signal processing means 4 and the control calculation processing means 40 each execute a program input from the storage device 1002. In this case, the program is fed from the auxiliary storage device to the processor 1001 via the volatile storage device. Furthermore, the processor 1001 can output data, such as a calculation result, either to the volatile storage device of the storage device 1002 or to the auxiliary storage device via the volatile storage device.Furthermore, the signal processing means 4 and the control calculation processing means 40 can be integrated or separated from each other.

[0083] The present application can be applied to an electronic control device whose controlled object is a vehicle control system, or to an electronic control device for controlling the operation of a vehicle-side device. Furthermore, the application of the electronic control device according to the present invention is not limited to a vehicle-side device.

[0084] Although the present application is described above with reference to various exemplary embodiments and implementations, it should be understood that the various features, aspects, and functions described in one or more of the individual embodiments are not limited in their applicability to the specific embodiment with which they are described, but can instead be applied alone or in various combinations to one or more of the embodiments. Therefore, within the scope of the technology disclosed in the present application, infinitely many unexplained embodiments are conceivable. For example, this includes the case where at least one component is modified, added, or omitted, and the case where at least one component is extracted and then combined with components of other embodiments. Description of the reference symbols 1 electronic control device 2 Control board 3 connectors 31 first connector 32 second connector 4 Signal processing equipment 40 Tax Calculation Processing Tools 5, 50, 51, 52, 53, 54 Signal wiring line 6, 61, 62 additional control devices 7 Additional circuit board 8 Sensor device 9 Exogenous noise protection circuit 90 resistance 91 First Resistance 92 second resistance 93 Capacitor 931 first capacitor 932 second capacitor PTC1, PTC2, PTC3, PTC4, PTC10, PTC20, PTC30, PTC40 individual signal lines SG1, SG2 Input / Output Signal SG3, SG4 specific signal ERRS error status signal SXS communication signal QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 11-26095

[0004]

Claims

[1] An electronic control device configured to control a controlled object, comprising: a control board; a connector that is mounted on the control board; and a signal processing device that is mounted on the control board and electrically connected to the connector via a signal wiring line provided on the control board, wherein an input / output signal intended for the connector is applied to the signal wiring line, and wherein the signal processing means perform a signal assignment in which the input / output signal is assigned to the signal wiring line. [2] Electronic control device according to claim 1, wherein the signal wiring line has an exogenous noise protection circuit, and wherein the exogenous noise protection circuit includes at least one capacitor and has the same configuration regardless of the type of input / output signal. [3] Electronic control device according to one of claims 1 and 2, wherein the signal processing means can change the signal assignment such that, among the input / output signals, an input / output signal with a high priority level is assigned to the signal wiring line instead of an input / output signal with a low priority level. [4] Electronic control device according to one of claims 1 to 3, further comprising a control calculation processing means mounted on the control board, wherein the control calculation processing means is electrically connected to the signal processing means via a signal wiring line other than the signal wiring line provided on the control board. [5] Electronic control device according to claim 4, wherein, upon receiving permission to change the signal assignment from the control calculation processing means, the signal processing means change the signal assignment to the signal wiring line. [6] Electronic control device according to claim 4, wherein the signal processing means modify the signal assignment to the signal wiring line in accordance with an irregularity condition caused by a break or short circuit of the signal wiring line. [7] Electronic control device according to any one of claims 4 to 6, wherein the signal processing means is activated after the control calculation processing means has been activated. [8] Electronic control device according to any one of claims 4 to 6, wherein the signal processing means is activated before the control calculation processing means is activated. [9] Electronic control device according to any one of claims 4 to 8, wherein the signal processing means monitors a state of the control calculation processing means by performing sending and receiving of a predetermined specific signal between the control calculation processing means and itself. [10] Electronic control device according to claim 9, wherein, upon detection of an operational irregularity in the control calculation processing means, the signal processing means outputs a fault condition signal to the signal wiring line which electrically connects the signal processing means to the connector. [11] Electronic control device according to claim 9, wherein, if the specific signal is not received by the control calculation processing means, the signal processing means output an error condition signal to the signal wiring line which electrically connects the signal processing means to the connector. [12] Electronic control device according to claim 9, wherein the specific signal is a watchdog timer signal. [13] Electronic control device according to claim 9, wherein the specific signal is sent and received by communication. [14] Electronic control device according to any one of claims 1 to 13, wherein the controlled object is a board vehicle device installed in a vehicle.

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