JP2019021731A - Electronic control device and electronic control system including the same - Google Patents

Abstract

To provide an electronic control device capable of suppressing the unintended running state.SOLUTION: An engine ECU includes a housing, a blower fan that cools the housing, an ECU temperature sensor for detecting a temperature in the housing, and a microcomputer housed in the housing and controlling driving of the blower fan and running of the vehicle. The microcomputer acquires the detection result of the ECU temperature sensor and compares the detection result with a temperature threshold value (S10, S11). Then, when the detection result is equal to or higher than the temperature threshold value, the microcomputer restricts the running state of the vehicle accompanying the running control by the microcomputer (S12).SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to an electronic control device mounted on a vehicle and an electronic control system including the electronic control device.

  As disclosed in Patent Document 1, an electronic control device mounted on a vehicle is known. The electronic control device includes a housing and a circuit board accommodated in the housing. The circuit board includes a control unit that controls a control target such as an engine. A plurality of heat radiating fins are provided on the outer surface of the housing in order to radiate heat generated by the circuit board.

Japanese Patent Laying-Open No. 2006-143852

  The electronic control device is downsized as the mounting space in the vehicle becomes narrower. For this reason, the installation area | region of the radiation fin in a housing | casing becomes narrow, and it is difficult to ensure heat dissipation performance. For this reason, there exists a possibility that a vehicle may be in the driving state which a vehicle does not intend when the temperature of an electronic control device exceeds operation guarantee temperature.

  This indication is made in view of the above-mentioned problem, and it aims at providing the electronic control system provided with the electronic control device which can control that it will be in an unintended run state, and an electronic control device.

In order to achieve the above object, the present disclosure
An electronic control device mounted on a vehicle,
A housing (20);
A blower unit (100) that forms a flow of air on the outer surface side of the housing by rotating the blade portion (120), and cools the housing;
A temperature detector (73) for detecting the temperature in the housing;
A control unit (70) housed in the housing and performing drive control of the blower unit and travel control of the vehicle,
The control unit
An acquisition unit (S10) for acquiring a detection result of the temperature detection unit;
And a limiting unit (S12) for limiting a traveling state of the vehicle associated with traveling control when the detection result is equal to or greater than a threshold value.

  As described above, the present disclosure limits the traveling state of the vehicle associated with traveling control when the detection result of the temperature detection unit that detects the temperature in the housing is equal to or greater than the threshold value, and thus prevents an unintended traveling state from occurring. it can.

Furthermore, in order to achieve the above object, the present disclosure
An electronic control system mounted on a vehicle and comprising a first electronic control device (10) and a second electronic control device (320),
The first electronic control unit
A housing (20);
A blower unit (100) that forms a flow of air on the outer surface side of the housing by rotating the blade portion (120), and cools the housing;
A temperature detector (73) for detecting the temperature in the housing;
A first control unit (70) housed in the housing and performing drive control of the blower unit and travel control of the vehicle;
A first communication device (75) for communicating with the second electronic control device,
The first control unit
An acquisition unit (S10) for acquiring a detection result of the temperature detection unit;
A first restriction unit (S12) for restricting a traveling state of the vehicle associated with traveling control when the detection result is equal to or greater than a threshold;
A transmission unit (S13, S13a) for transmitting temperature information correlated with the detection result to the second electronic control device via the first communication device;
The second electronic control device
A second communication device (321) for communicating with the first communication device;
A second control unit (322) for limiting the running state based on the temperature information,
The second control unit
And a second restriction unit (S23, S23a) for restricting the running state when the detection result is determined to be equal to or greater than the threshold based on the temperature information.

  Thus, the present disclosure is not intended because the first electronic control device limits the traveling state of the vehicle associated with traveling control when the detection result of the temperature detection unit that detects the temperature in the housing is equal to or greater than the threshold value. It can control that it will be in a run state.

  Furthermore, this indication transmits the temperature information correlated with the detection result of a temperature detection part to a 2nd electronic control apparatus via a 1st communication apparatus. Then, the second electronic control device limits the traveling state of the vehicle accompanying the traveling control by the first control unit when it is determined that the detection result is equal to or greater than the threshold based on the transmitted temperature information. Thus, the present disclosure can further suppress an unintended traveling state. That is, the present disclosure is accompanied by travel control by the first control unit by the second electronic control device even when the first electronic control device cannot limit the travel state of the vehicle accompanying travel control. The traveling state of the vehicle can be limited.

  The reference numerals in parentheses described in the claims and in this section indicate the correspondence with the specific means described in the embodiments described later as one aspect, and are within the technical scope of the present disclosure. It is not intended to limit.

It is a block diagram which shows schematic structure of the electronic controller in 1st Embodiment. It is a perspective view which shows schematic structure of the electronic controller in 2nd Embodiment. It is sectional drawing which follows the III-III line of FIG. It is a flowchart which shows the processing operation of engine ECU in 1st Embodiment. It is a flowchart which shows the processing operation of HVECU in 1st Embodiment. It is a flowchart which shows the processing operation of engine ECU in 2nd Embodiment. It is a flowchart which shows the processing operation of HVECU in 2nd Embodiment. It is a flowchart which shows the processing operation of HVECU in 3rd Embodiment. It is a flowchart which shows the processing operation of ATECU in 4th Embodiment.

  Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, portions corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals and redundant description may be omitted. In each embodiment, when only a part of the configuration is described, the other configurations described above can be applied to other portions of the configuration.

  In the following, the three directions orthogonal to each other are referred to as an X direction, a Y direction, and a Z direction. A plane defined by the X direction and the Y direction is referred to as an XY plane, and a plane defined by the X direction and the Z direction is referred to as an XZ plane.

(First embodiment)
The engine ECU (electronic control unit) 10 according to the present embodiment will be described with reference to FIGS. First, a schematic configuration of the engine ECU 10 according to the present embodiment will be described based on FIGS. 1, 2, and 3.

  In the present embodiment, the electronic control device is applied to an engine ECU 10 that controls an engine as a travel drive source of the vehicle. In the present embodiment, as an example, an engine ECU 10 mounted on a vehicle equipped with an engine and a traveling motor, that is, a so-called hybrid vehicle is used as a traveling drive source. Engine ECU 10 is electrically connected to HVECU 320. In this embodiment, the electronic control system is applied to an electronic control system that is mounted on a vehicle and includes the engine ECU 10 and the HVECU 320. The engine ECU 10 corresponds to a first electronic control unit. On the other hand, the HVECU 320 corresponds to an external control device and a second electronic control device.

  Therefore, the vehicle has an engine mode, an EV mode, and an HV mode as travel modes, and the travel mode can be selectively switched according to the travel state. The engine mode is a mode in which only the engine is used as a traveling drive source and the driving force is mechanically transmitted to the wheels to travel. The EV mode is a mode in which the engine is stopped and the traveling motor is used as a traveling drive source, and the driving force is mechanically transmitted to the wheels to travel. The HV mode is a mode in which both the engine and the travel motor travel using the travel drive source.

  The HVECU 320 controls the traveling mode of the vehicle by performing cooperative control with the engine ECU 10 and the like. The HVECU 320 includes an HVECU side communication device 321, an HVECU side microcomputer 322, and the like. The HVECU side communication device 321 corresponds to a second communication device and performs communication with the engine ECU 10. The HVECU side microcomputer 322 corresponds to a second control unit, and performs switching from the engine mode to the EV mode, for example. Moreover, the HVECU side microcomputer 322 restrict | limits the driving | running | working state of the vehicle accompanying the driving | running control by the microcomputer 70 of engine ECU10, when it determines with the detection result of ECU temperature sensor 73 being more than a threshold value based on the temperature information demonstrated later. .

  Further, the HVECU 320 is electrically connected to the meter ECU 330. Therefore, the HVECU 320 can make a lighting request to the meter ECU 330.

  As shown in FIG. 1, the engine ECU 10 is configured to be mountable on a vehicle, and includes a microcomputer (hereinafter referred to as a microcomputer) 70, a monitoring IC 71, a throttle drive driver 72, an ECU temperature sensor 73, a communication device 75, and the like. . In addition, the engine ECU 10 is electrically connected to an input-system vehicle-mounted device and a control target.

  As an example of the input-system in-vehicle device, a driver request detection unit, an actuator state detection unit, an engine state detection unit, a vehicle state detection unit, and the like can be employed. The driver request detection unit detects, for example, the operation state of the brake pedal, the operation state of the accelerator pedal, the operation position of the shift operation unit, and the like as the driver request. Then, the driver request detection unit outputs these detection results to the microcomputer 70 as a driver request signal.

  The actuator state detection unit detects the state of each actuator in the injector device, the intake valve device, the electronic throttle device 310, and the like as the actuator state. Then, the actuator state detection unit outputs these detection results to the microcomputer 70 as an actuator state signal. In the present embodiment, an electronic throttle device 310 is employed as an example. For this reason, a throttle motor in the electronic throttle device 310 is employed as an example of the actuator. This throttle motor is an actuator that opens and closes a throttle valve.

  The engine state detection unit detects, for example, the engine coolant temperature, the engine rotation state, and the like as the engine state. The engine state detection unit outputs these detection results as an engine state signal to the microcomputer 70 and the like.

  The vehicle state detection unit detects, for example, travel speed, battery voltage, and the like as the vehicle state. And a vehicle state detection part outputs these detection results to the microcomputer 70 etc. as a vehicle state signal.

  Moreover, in this embodiment, the ventilation fan 100 and an engine are employ | adopted as an example of a control object. The engine includes an injector device, an intake valve device, an electronic throttle device 310, and the like. Therefore, it can be said that the engine includes each actuator in the injector device, the intake valve device, and the electronic throttle device. The microcomputer 70 is electrically connected to the electronic throttle device 310 via the throttle drive driver 72. The blower fan 100 corresponds to a blower unit.

  As shown in FIGS. 2 and 3, the engine ECU 10 includes a waterproof housing including a case 20 and a cover 30, a circuit board 60, a blower fan 100, and the like. The engine ECU 10 is provided in the engine room together with the engine. FIG. 3 is a partial cross-sectional view of the engine ECU 10 on the XZ plane.

  The waterproof housing provides a waterproof space as an internal space S1 that accommodates the circuit board 60. The waterproof housing is divided into two members in the Z direction, which is the thickness direction of the circuit board 60. One of the two members is a case 20 and the other is a cover 30. The waterproof housing is configured by assembling the case 20 and the cover 30 to each other through a seal member (not shown). That is, the waterproof housing provides the waterproof space by assembling the case 20 and the cover 30 via the seal member. The waterproof housing corresponds to a housing having the wall portion 21. In the present embodiment, an example in which the circuit board 60 is housed in a waterproof housing is employed. However, the circuit board 60 may be accommodated in a casing that is not waterproof.

  The case 20 has a box shape whose one surface is open. In the present embodiment, the case 20 is formed using a metal material such as aluminum in order to improve heat dissipation. That is, the case 20 can protect the circuit board 60 even if it is formed using a resin material. However, by forming the case 20 using a metal material, heat dissipation can be improved as compared with that formed using a resin material. The case 20 may be formed by, for example, aluminum die casting.

  The wall portion 21 of the case 20 has a substantially rectangular planar shape, for example. The wall portion 21 of the case 20 corresponds to the wall portion of the waterproof housing. A notch (not shown) is provided in one of the four side walls connected to the wall portion 21. This notch is connected to an opening on one surface of the case 20. Further, the notch is provided to expose a part of the connector 40 to the outside of the waterproof housing.

  The wall 21 is formed with a fan attachment opening 25 that penetrates the wall 21 in the thickness direction. The fan attachment opening 25 is an opening for attaching the blower fan 100 to the case 20 of the waterproof housing. The fan mounting opening 25 is formed over the outer surface and the inner surface of the case 20. That is, the fan mounting opening 25 is a through hole that communicates the internal space S1 and the external space of the waterproof housing. The fan mounting opening 25 corresponds to a through hole formed in the wall 21.

  In the present embodiment, as an example, a case 20 in which a portion where the fan mounting opening 25 is formed is provided so as to be recessed with respect to other portions of the wall portion 21 (such as the connector mounting portion 22) is employed. . That is, the case 20 includes a portion of the wall portion 21 that protrudes from the portion where the fan mounting opening 25 is formed. The connector attachment portion 22 is provided on one end side in the X direction so as to accommodate the connector 40. However, depending on the electrical connection structure between the circuit board 60 and the external device, the connector mounting portion 22 may not be formed on the case 20.

  In the present embodiment, the wall portion 21 has a high-profile housing that accommodates a high-profile component such as an aluminum electrolytic capacitor that constitutes the circuit board 60 as a portion protruding from the portion where the fan mounting opening 25 is formed. The case 20 in which the portion is formed is adopted as an example. The high-profile housing part of the present embodiment extends from the connector mounting part 22 in the X direction. However, when the circuit board 60 does not include a high-profile component, the case 20 does not have to be formed with a high-profile housing portion. The high-profile component is a component that is taller than a semiconductor element such as a MOSFET. In addition, the high-profile component can be rephrased as a tall component.

  As described above, the fan attachment opening 25 is formed in a portion of the wall portion 21 excluding the connector attachment portion 22 and the high-profile housing portion. The fan mounting opening 25 is formed in a substantially flat portion of the wall portion 21.

  2 is a vehicle body fixing portion for attaching the engine ECU 10 to the vehicle with screws or the like. Reference numeral 24 denotes a housing fixing hole for fixing the case 20 and the cover 30. A screw (not shown) is inserted into the housing fixing hole 24. The vehicle body fixing portion 23 and the housing fixing hole 24 are provided integrally with the case 20.

  However, the engine ECU 10 may be attached to the vehicle with a clip or an adhesive. In this case, the case 20 does not need to be provided with the vehicle body fixing portion 23. Further, the case 20 and the cover 30 may be fixed by a clip or an adhesive. In this case, the case 20 does not need to be provided with the housing fixing hole 24.

  The cover 30 forms an internal space S1 of the waterproof housing together with the case 20. By assembling the case 20 and the cover 30, the opening of one surface of the case 20 is closed by the cover 30. Moreover, the opening of one surface of the case 20 is closed by the cover 30, so that a notch formed in the side wall is partitioned and becomes an opening (not shown). A part of the connector 40 is exposed to the outside through the opening. Note that at least a portion of the connector 40 is disposed in the internal space S1, and the remaining portion is disposed in the external space.

  In the present embodiment, in order to improve heat dissipation, a cover 30 formed using a metal material such as aluminum as in the case 20 can be employed. The cover 30 can be formed by, for example, aluminum die casting, similarly to the case 20. The cover 30 has a box shape with one surface opened. In the present embodiment, as an example, a cover 30 having a plurality of heat radiation fins 31 formed on the outer surface side is employed. However, the cover 30 may not have the heat radiation fins 31 formed thereon.

  The seal member of the waterproof housing is such that the internal space S1 is connected to the external space of the waterproof housing through the case 20 and the cover 30, the case 20 and the connector 40, and the cover 30 and the connector 40. It is provided so as to block communication. The seal member is disposed on the peripheral edge portions of the case 20 and the cover 30 so as to surround the internal space S1. The peripheral portions of the case 20 and the cover 30 are sealed in a watertight manner by the sealing member. As the seal member, for example, a liquid adhesive can be employed before curing. Further, the seal member is not limited to this, and may be a member that is watertightly sealed by elastic deformation such as an O-ring or an annular rubber sheet.

  The circuit board 60 is accommodated in the internal space S <b> 1 of the waterproof housing, and is fixed to the case 20 or the cover 30. That is, the circuit board 60 is attached to the waterproof housing. The circuit board 60 may be sandwiched between the case 20 and the cover 30 and fixed to the case 20 and the cover 30. The structure for fixing the circuit board 60 to the case 20 and the cover 30 is not particularly limited.

  The circuit board 60 includes a printed circuit board and a circuit element 61 mounted on the printed circuit board. The printed circuit board is formed by arranging wiring on a base material formed using an electrically insulating material such as a resin. A circuit is formed on the circuit board 60 by the wiring and the circuit element 61. Note that the printed circuit board has a substantially rectangular planar shape, for example. The circuit element 61 is mounted on at least one of the surface on the case 20 side and the surface on the cover 30 side of the printed circuit board.

  In the present embodiment, among the circuit elements 61, a heating element such as a power MOSFET is disposed on the case 20 side surface of the printed circuit board and around the blower fan 100 in a plan view in the Z direction. It is preferable that the engine ECU 10 actively cools the periphery of the heat generating element, that is, the region of the wall 21 facing the heat generating element. For this reason, it is preferable that the heat generating element is provided around the blower fan 100 and at a position along the opening direction of the second vent 212 described later. That is, it is preferable that the blower fan 100 is configured to be able to supply air to a region of the wall portion 21 that faces the heating element. The engine ECU 10 can be configured to be able to supply wind to a region of the wall portion 21 that faces the heat generating element, depending on the position of the blower fan 100 in the wall portion 21, the position of the second vent 212 in the blower fan 100, and the like. .

  In the present embodiment, the circuit element 61 which is a surface mount type element is employed. However, in the present embodiment, a printed board on which the through hole 62 is formed is employed. For this reason, the circuit element 61 can be employed even if it is electrically connected to the printed circuit board (wiring) with the terminal inserted into the through hole 62.

  The circuit board 60 includes a plurality of circuit elements 61. The plurality of circuit elements 61 include not only the heating elements as described above but also various elements. Further, it can be said that the circuit board 60 includes a monitoring IC 71 as one of the circuit elements 61. As the monitoring IC 71, for example, one configured as an ASIC (Application Specific Integrated Circuit) can be employed.

  A circuit formed by the wiring and the circuit element 61 includes a microcomputer 70, a monitoring IC 71, a throttle drive driver 72, an ECU temperature sensor 73, a communication device 75, and the like. Therefore, it can be said that the circuit board 60 includes the microcomputer 70, the monitoring IC 71, the throttle drive driver 72, the ECU temperature sensor 73, the communication device 75, and the like.

  Here, the microcomputer 70, the monitoring IC 71, the throttle drive driver 72, the ECU temperature sensor 73, and the communication device 75 configured on the circuit board 60 will be described.

  The microcomputer 70 corresponds to a control unit and a first control unit. It can be said that the microcomputer 70 has at least one arithmetic processing unit (CPU) and at least one memory device (MMR) as a storage medium for storing programs and data. The storage medium can be provided by a semiconductor memory or a magnetic disk. The microcomputer 70 can be provided by one computer or a set of computer resources linked by a data communication device. The program is executed by the arithmetic processing device to cause the engine ECU 10 to function as a device described in this specification, and to cause the control device to function so as to execute the method described in this specification. The engine ECU 10 provides various elements. At least some of those elements can be referred to as a means for performing functions, and in another aspect, at least some of those elements can be referred to as building blocks or modules.

  The means and / or function provided by the engine ECU 10 can be provided by software recorded in a substantial memory device and a computer that executes the software, only software, only hardware, or a combination thereof. For example, when the engine ECU 10 is provided by an electronic circuit that is hardware, it can be provided by a digital circuit including a large number of logic circuits, or an analog circuit.

  The microcomputer 70 is housed in a waterproof casing, and performs drive control of the blower fan 100 and vehicle travel control. The microcomputer 70 includes a plurality of functional blocks. That is, the microcomputer 70 includes functional blocks such as an ECU temperature determination unit, a cut request unit, a blower fan drive request unit, an engine control unit, a throttle control unit, and a communication unit. Note that the microcomputer 70 may include a built-in temperature sensor built in the arithmetic processing unit.

  The ECU temperature determination unit is a part that determines the temperature in the engine ECU 10 based on the detection result of the ECU temperature sensor 73. That is, the ECU temperature determination unit compares the temperature in the engine ECU 10 with the temperature threshold value and determines whether or not the temperature in the engine ECU 10 has reached the temperature threshold value. That is, the ECU temperature determination unit determines whether or not the engine ECU 10 is in a high temperature state. Note that the temperature in the engine ECU 10 corresponds to the temperature in the waterproof housing, and may be abbreviated as ECU temperature. The ECU temperature can be regarded as an agreement with the detection result of the ECU temperature sensor 73. A state where the ECU temperature is equal to or higher than the temperature threshold can be said to be an ECU high temperature state.

  This temperature threshold corresponds to a threshold to be compared with the detection result of the ECU temperature sensor 73. Further, as the temperature threshold, for example, an operation guarantee temperature of the microcomputer 70 or the engine ECU 10 or a temperature with a margin in the operation guarantee temperature can be adopted.

  The cut request unit requests to cut off the power supply to the drive circuit of the throttle drive driver 72 according to the determination result of the ECU temperature determination unit. That is, the cut request unit cuts off power supply to the drive circuit when it is determined that the engine ECU 10 is in a high temperature state. The cut request unit stops the operation of the throttle motor by cutting off the power supply to the drive circuit. In other words, the cut request unit makes a throttle cut request to the throttle drive driver 72. Further, the cut request unit does not cut off the power supply to the drive circuit when it is not determined that the engine ECU 10 is in a high temperature state.

  The cut request unit may cut off the power supply to the drive circuit due to a factor other than whether or not the engine ECU 10 is in a high temperature state. In this case, the cut request unit may cut off the power supply to the drive circuit even when the engine ECU 10 is not determined to be in a high temperature state.

  Note that the cut request unit performs throttle cut as one of fail-safe processes. The present embodiment is not limited to this, and other fail-safe processes can be employed. For example, the cut request unit may notify the driver that the engine ECU 10 is in a high temperature state, or may limit the amount of fuel injected into the engine. For this reason, the cut request unit can be said to be a fail-safe processing unit.

  The blower fan drive request unit requests the blower fan 100 to be driven (actuated) according to the determination result of the ECU temperature determination unit. That is, when it is determined that the engine ECU 10 is in a high temperature state, the blower fan drive request unit drives the blower fan 100 in order to cool the case 20 and thus the circuit board 60. In other words, when it is determined that the engine ECU 10 is in a high temperature state, the blower fan drive request unit rotates the blade portion 120 of the blower fan 100 to supply air to the case 20 from the second vent 212. Thus, the microcomputer 70 performs drive control of the blower fan 100.

  The engine control unit controls each actuator of the engine by outputting an engine control signal based on a detection result in each of the input in-vehicle devices. For example, the engine control unit requests the opening degree of the throttle valve from the throttle control unit. The throttle control unit outputs a drive request for the electronic throttle device 310 to the throttle drive driver 72 in response to a throttle opening request from the engine control unit. As described above, the microcomputer 70 controls the traveling of the vehicle by controlling the engine. That is, it can be said that the microcomputer 70 performs vehicle travel control in the engine mode and vehicle travel control in the HV mode.

  The communication unit requests the communication device 75 to communicate with the HVECU 320. The communication unit requests the communication device 75 to transmit, for example, the detection result of the ECU temperature sensor 73 and the determination result of the ECU temperature determination unit to the HVECU 320.

  The monitoring IC 71 is provided separately from the microcomputer 70 and monitors the operation of the microcomputer 70. The monitoring IC 71 monitors the operation of the microcomputer 70 by, for example, a method using a watchdog or a method using monitoring communication. When using monitoring communication, the monitoring IC 71 determines that the microcomputer 70 is abnormal when it is not transmitted according to a predetermined pattern or when it is not transmitted within a predetermined period.

  For example, the monitoring IC 71 resets the microcomputer 70 when it is determined that the microcomputer 70 is abnormal. Further, the monitoring IC 71 may request the throttle drive driver 72 to shut off the power supply to the drive circuit according to the determination result of the ECU temperature determination unit. That is, the monitoring IC 71 may make a throttle cut request.

  The throttle drive driver 72 includes a drive logic unit, a switch, a drive circuit, and the like. The drive logic unit drives the throttle motor by controlling the drive circuit in response to a drive request from the throttle control unit.

  The switch is provided between the drive circuit and the power supply, and is controlled to be opened and closed by a cut request unit. When the switch is closed, the throttle drive driver 72 is electrically connected to the drive circuit and the power supply, and power is supplied to the drive circuit. On the other hand, the throttle drive driver 72 is opened in response to a throttle cut request from the cut request unit, whereby the drive circuit and the power supply are electrically disconnected, and the power supply to the drive circuit is cut off. The drive circuit is a circuit that drives the throttle motor, and is an H-bridge circuit configured of MOSFET.

  In the electronic throttle device, when the power supply to the drive circuit is stopped, the throttle valve has a minimum opening. This limits the torque of the engine. The engine ECU 10 limits the travel control in the engine mode by shutting off the power supply to the drive circuit and stopping the operation of the throttle motor. Note that the engine ECU 10 can suppress the heat generation of the throttle drive driver 72 as compared with the case where the throttle drive driver 72 opens and closes the throttle valve.

  The ECU temperature sensor 73 corresponds to a temperature detection unit. The ECU temperature sensor 73 is electrically connected to the microcomputer 70. The ECU temperature sensor 73 includes, for example, a thermistor, and is provided inside the waterproof housing and outside the microcomputer 70. The ECU temperature sensor 73 detects the temperature inside the waterproof casing, that is, the temperature inside the engine ECU 10. The temperature in the engine ECU 10 can be regarded as the temperature of the engine ECU 10. It can be said that the microcomputer 70 acquires the ECU temperature using the ECU temperature sensor 73.

  The temperature information is information correlated with the detection result of the ECU temperature sensor 73. The temperature information is a detection result of the ECU temperature sensor 73 or a determination result in the ECU temperature determination unit.

  The communication device 75 corresponds to a communication device or a first communication device. The communication device 75 is electrically connected to the HVECU side communication device 321 of the HVECU 320. The communication device 75 includes a communication driver and communicates with the HVECU 320. The communication device 75 transmits, for example, the detection result of the ECU temperature sensor 73 and the determination result of the ECU temperature determination unit to the HVECU-side communication device 321 in response to a request from the communication unit.

  A connector 40 is mounted on the circuit board 60. The connector 40 is an electronic component for electrically connecting the circuit board 60 and an electronic device provided outside the engine ECU 10. The connector 40 is mounted on one end side in the X direction of the circuit board 60 and is electrically connected to the wiring of the printed board. A part of the connector 40 is exposed to the outside through the opening of the waterproof housing, and the remaining part is accommodated in the internal space S1.

  The connector 40 has a housing formed using a resin material and a plurality of terminals formed using a conductive material and held in the housing. That is, the connector 40 has a plurality of terminals electrically connected to the wiring of the printed circuit board. The connector 40 may be electrically connected to the wiring of the printed circuit board with a plurality of terminals inserted into the through holes 62.

  The blower fan 100 corresponds to a blower unit. The blower fan 100 is attached to the wall portion 21 of the case 20. The blower fan 100 is attached to the fan attachment opening 25 of the case 20. The blower fan 100 is provided to cool the circuit board 60.

  The blower fan 100 forms a flow of air as shown by a one-dot chain line in FIG. That is, the blower fan 100 forms a flow of air along the outer surface of the wall portion 21 through the vent holes 201 and 212 provided in the housing 200 as the blade portion 120 rotates. In addition, the blower fan 100 can form an air flow as indicated by a one-dot chain line in FIG. 3 by configuring the positions and opening directions of the first vent 201 and the second vent 212 later. it can. Furthermore, it can be said that the blower fan 100 is driven and controlled by the microcomputer 70 to cool the waterproof casing by forming an air flow along the outer surface of the wall portion 21.

  The blower fan 100 cools the circuit board 60 by supplying wind to the case 20. That is, it can be said that the blower fan 100 cools the case 20 to cool the circuit board 60 in the case 20. As the blower fan 100, for example, a well-known axial fan configuration can be adopted.

  The blower fan 100 includes a fan mechanism that is a part that supplies wind to the case 20 and a housing 200 that holds the fan mechanism. The blower fan 100 is fixed to the case 20 via the seal member 50 and is electrically connected to the circuit board 60.

  The fan mechanism includes, for example, a shaft portion 110, a blade portion 120, a fan circuit board 130, a terminal 140, a potting portion 150, a motor, and the like. Further, the fan mechanism includes a bearing that rotatably supports the blade portion 120 while being partially fixed to the housing 200. Bearings are a well-known technique and are lubricated with grease. In addition, since the well-known structure in an axial fan can be employ | adopted for a fan mechanism, in FIG. 3, etc., the axial part 110, the blade | wing part 120, etc. are simplified and shown in figure.

  For example, the shaft part 110 is disposed around the rotary shaft 111 and is fixed to the housing 200 around the rotary shaft 111, which serves as a rotating shaft of the blade part 120, a bearing that allows the rotary shaft 111 to rotate with respect to the housing 200 and the coil. A coil that has been made. The coil is electrically connected to the fan circuit board 130 and is energized from the fan circuit board 130. The coil is provided at a plurality of locations around the rotation axis. The fan circuit board 130 corresponds to a drive unit that drives (rotates) the blade unit 120 based on the instruction signal.

  The rotating shaft 111 is provided perpendicular to the circuit board 60 in a state where the blower fan 100 is attached to the case 20 or the circuit board 60. The blower fan 100 is attached to the case 20 so that the axial direction of the rotating shaft 111, that is, the direction of the rotating shaft of the blade portion 120 coincides with the Z direction. That is, the blower fan 100 is disposed on the wall portion 21 in a state where the rotation axis of the blade portion 120 coincides with the thickness direction of the circuit board 60, that is, in a state along the Z direction. For this reason, as for the ventilation fan 100, the blade | wing part 120 rotates along XY plane.

  In addition, for example, a plurality of blade portions 120 are provided at equal intervals around the coil, and a magnet is attached at a position facing the coil. The blade portion 120 is fixed to the rotating shaft 111 and is configured to be rotatable with respect to the housing 200 as the rotating shaft 111 rotates. The rotating shaft 111, the coil, and the magnet are part of the motor.

  Thus, it can be said that the fan mechanism includes a rotor configured to be rotatable with respect to the housing 200 and a stator fixed to the housing 200. The rotor includes, for example, a rotating shaft 111, a blade portion 120, and the like. On the other hand, the stator includes, for example, a coil and a bearing. Furthermore, it can be said that the fan mechanism includes a motor and a blade portion 120 that rotates as the motor rotates.

  In the blower fan 100, the blade portion 120 rotates when the coil is energized. The blower fan 100 sucks air from the first vent 201 and discharges it from the second vent 212 as the blade portion 120 rotates. In this case, the first vent 201 may be referred to as a suction port, and the second vent 212 may be referred to as a discharge port.

  The blower fan 100 may be configured to suck air from the second vent 212 and discharge from the first vent 201 by rotating the blade portion 120. In this case, the second vent 212 can be referred to as a suction port, and the first vent 201 can be referred to as a discharge port.

  In this embodiment, the potting unit 150 is employed to protect the fan circuit board 130. However, the present disclosure is not limited to this, and the fan circuit board 130 and the terminals 140 may be insert-molded together with the housing 200 described later. Furthermore, the blower fan 100 may not be provided with the potting unit 150. Note that the fan mechanism employed in this embodiment is an example. The fan mechanism can be employed even if it has the same configuration as the centrifugal fan, for example.

  The housing 200 houses the fan mechanism in a state where the rotor such as the rotating shaft 111 and the blade portion 120 can rotate. The housing 200 includes a first vent 201, a side wall 210, a side wall end 211, a second vent 212, a bottom 220, a flange 221 and the like. Since the fan mechanism is surrounded by the side wall 210 of the housing 200, the blower fan 100 can suppress foreign matters such as stepping stones from hitting the fan mechanism, and can protect the blade portion 120 of the fan mechanism.

  The housing 200 is disposed so as to cover the fan mounting opening 25 while facing the peripheral portion of the fan mounting opening 25 on the inner surface of the wall 21 so as to close the fan mounting opening 25. That is, the housing 200 is disposed on the wall portion 21 so as to close the fan mounting opening 25 while having a portion facing the inner surface of the wall portion 21. The housing 200 is formed with a plurality of vent holes 201 and 212. The plurality of vent holes are formed at different positions in the Z direction so that an air flow along the outer surface of the wall portion 21 is formed as the blade portion 120 rotates.

  In the present embodiment, the housing 200 in which the first vent 201 and the second vent 212 are formed is employed. One of the first vent 201 and the second vent 212 functions as an air inlet and the other functions as an outlet.

  The first vent 201 and the second vent 212 are both formed above the outer surface of the wall 21 around the opening of the fan mounting opening 25, that is, at a position away from the circuit board 60 in the Z direction. Yes. The first vent 201 is formed so that at least a part thereof is positioned above the blade part 120 in the Z direction, and the second vent 212 is formed so that at least a part thereof is positioned below the blade part 120 in the Z direction. Yes. Furthermore, the second vent 212 is provided at a position where it is disposed outside the waterproof housing in a state where the blower fan 100 is attached to the case 20. That is, the second vent 212 is provided at a position opposite to the internal space S1 with respect to the outer surface of the wall portion 21.

  The first vent 201 is open in the Z direction. On the other hand, the second vent 212 is opened in a direction along the XY plane (hereinafter, XY plane direction). Thus, the opening direction of the 1st ventilation hole 201 and the 2nd ventilation hole 212 differs. For this reason, it can be said that the flow of the wind which passes the 1st ventilation port 201 at the time of the blade | wing part 120 rotating becomes a Z direction. On the other hand, it can be said that the flow of wind passing through the second vent 212 when the blade portion 120 rotates is in the XY plane direction. It can be said that the blower fan 100 is configured to change the direction of the wind passing through the suction port and the direction of the wind passing through the discharge port. Further, the blower fan 100 is configured such that the air sucked in the XY plane direction can be discharged in the Z-axis direction or the air sucked in the Z-axis direction can be discharged in the XY plane direction by rotating the blade portion 120. It can be said that there is.

  In the present embodiment, the housing 200 has a side wall 210, a bottom part 220, and a flange part 221. The housing 200 is formed using, for example, a resin material. The side wall 210 and the bottom 220 have a bottomed cylindrical shape with one end opened in the Z direction. The opening of this cylinder is the first vent 201. The entire first vent 201 is provided above the blade portion 120 in the Z direction.

  The housing 200 has, for example, a substantially rectangular bottom 220 and four side walls 210 connected to the bottom 220. A second vent 212 is formed in at least one of the side walls 210. In the present embodiment, a second vent 212 is formed in each of the four side walls 210. The second vent 212 is a through hole that penetrates the side wall 210. The second vent 212 is formed such that the Z direction is the short direction and the direction perpendicular to the Z direction is the long direction. However, the opening shape of the second vent 212 is not limited to this. The second vent 212 may have a circular or square opening shape, and is not particularly limited.

  The side wall 210 has a second vent 212 formed at a position away from the bottom 220 in the Z direction. The side wall 210 is provided with a side wall end 211 at the end on the bottom 220 side. The side wall end 211 is a portion of the side wall 210 between the second vent 212 and the bottom 220. In the side wall end portion 211, the distance from the bottom portion 220 and the flange portion 221 to the second vent 212 in the Z direction is longer than the thickness of the wall portion 21. As a result, the second vent 212 of the housing 200 is disposed outside the waterproof housing. However, in the housing 200, the second vent 212 does not communicate with the internal space S1, and at least a part of the second vent 212 may be disposed outside the waterproof housing.

  In addition, in order to maintain the waterproof property of the waterproof housing attached to the case 20, the housing 200 is not formed with a hole that connects the housing space housing the blade portion 120 and the internal space S <b> 1. That is, for example, the bottom portion 220 is not provided with a through-hole or the like reaching the internal space S1. It can be said that the bottomed cylindrical member constituted by the side wall 210 and the bottom part 220 has no opening at the bottom.

  However, in the housing 200, as will be described later, a terminal 140 for electrically connecting the blower fan 100 and the circuit board 60 protrudes into the internal space S1. For this reason, the terminal 140 is configured to protrude from the housing 200 in a watertight state with the housing 200. This can be achieved by insert molding the terminal 140 when forming the housing 200.

  In the present embodiment, the housing 200 in which the corners of the adjacent side walls 210, that is, the connecting portions have an R shape, is employed. The second vent 212 is formed in a flat portion excluding the R-shaped portion. However, the housing 200 is not limited to this, and may not have an R shape, and the second vent 212 may be formed in a portion having the R shape.

  Moreover, in this embodiment, the housing 200 in which the 2nd vent 212 was formed in four places is employ | adopted. However, the housing 200 is not limited to this, and the second vent 212 may be formed at three or less locations, or the second vent 212 may be formed at five or more locations. Furthermore, the housing 200 may have a round shape in a plan view in the Z direction.

  As shown in FIG. 3, the housing 200 is inserted into the fan mounting opening 25. The housing 200 is disposed over the inside and outside of the case 20 through the fan mounting opening 25. At least a part of the bottom 220 is disposed in the internal space S1. A part of the side wall 210 is disposed in the fan mounting opening 25, and the other part protrudes above the outer surface of the wall 21. In the present embodiment, a part of the side wall end 211 is disposed in the fan mounting opening 25 in a state where the housing 200 is inserted into the fan mounting opening 25. That is, the side wall end portion 211 faces the side wall of the wall portion 21 constituting the fan mounting opening 25 in the direction orthogonal to the Z direction.

  The flange portion 221 is formed integrally with the side wall 210 and the bottom portion 220 so as to spread from the lower end of the cylinder formed by the side wall 210 and the bottom portion 220. The flange portion 221 is provided so as to face the wall portion 21 on the entire circumference around the fan mounting opening 25. In the present embodiment, the flange portion 221 is continuous with the lower end of the side wall 210 and the outer peripheral end of the bottom portion 220. That is, it can be said that the flange portion 221 is a portion protruding along the XY plane from the lower end of the side wall 210 and the outer peripheral end of the bottom portion 220. Further, the flange portion 221 faces the peripheral portion of the fan mounting opening 25 on the inner surface of the wall portion 21. The flange portion 221 corresponds to a portion facing the inner surface of the wall portion 21.

  The blower fan 100 is fixed to the case 20 at least at the flange portion 221. In the engine ECU 10, a waterproof seal portion 51 is configured by a part of a facing portion between the housing 200 and the case 20. The waterproof seal portion 51 includes a seal member 50 interposed at least at a portion where the flange portion 221 and the case 20 are opposed to each other. In the present embodiment, an example is employed in which the seal member 50 is interposed in the facing portion between the side wall end portion 211 and the case 20 in addition to the facing portion between the flange portion 221 and the case 20. In addition, the opposing part of the flange part 221 and the case 20 can be rephrased as an area between the flange part 221 and the case 20 or an opposing area. Similarly, the facing portion between the side wall end portion 211 and the case 20 can be restated as a region between the side wall end portion 211 and the case 20 or a facing region.

  In the present embodiment, the blower fan 100 is employed as the blower unit. However, the blower unit is not limited to this, and even a fan that is not waterproof can be employed.

  The waterproof seal 51 is provided in an annular shape so as to surround the fan mounting opening 25. A portion of the housing 200 and the case 20 that overlaps with the seal member 50 in a plan view in the Z direction is a portion constituting the waterproof seal portion 51. In this embodiment, in addition to the facing portion between the flange portion 221 and the case 20, the facing portion between the side wall end portion 211 and the case 20 is the waterproof seal portion 51. As described above, the engine ECU 10 has the waterproof seal 51 that seals the periphery of the fan mounting opening 25 in a watertight manner, with the seal member 50 interposed between the wall 21 and the housing 200. It can be said.

  However, engine ECU10 is not limited to this, For example, the sealing member 50 does not need to be provided in the opposing part of the side wall end part 211 and the case 20. FIG. In this case, the engine ECU 10 is provided with a seal member 50 in a predetermined range from the tip of the flange portion 221, and this portion becomes the waterproof seal portion 51.

  The engine ECU 10 is not limited to these, and seals the entire periphery of the fan mounting opening 25 and a part of the facing part between the flange part 221 and the case 20 and a part of the facing part between the side wall 210 and the case 20. The member 50 should just be provided.

  Further, as the seal member 50, a liquid adhesive can be adopted before curing. The blower fan 100 is fixed to the case 20 with a waterproof seal 51.

  In this embodiment, engine ECU10 provided with the waterproof seal part 51 is employ | adopted. However, the engine ECU 10 is not limited to this, and may not include the waterproof seal portion 51 when the circuit board 60 is accommodated in a casing that does not have waterproofness.

  The terminal 140 corresponds to an electrical connection terminal, protrudes from the housing 200 toward the internal space S <b> 1, and is electrically connected to the circuit board 60. The blower fan 100 includes, for example, three terminals 140. The terminal 140 passes through the bottom part 220 of the housing 200. The terminal 140 protrudes into the internal space S <b> 1 from a portion surrounded by the waterproof seal portion 51 in the housing 200. That is, it can be said that the terminal 140 protrudes from the bottom 220 in the Z direction and toward the circuit board 60. A part of the terminal 140 is electrically connected to the fan circuit board 130 disposed in the housing 200, and the other part is electrically connected to the circuit board 60.

  Thus, in the engine ECU 10, the fan circuit board 130 (that is, the blower fan 100) and the circuit board 60 are electrically connected via the terminal 140. Further, the blower fan 100 is provided at a position where the terminal 140 is surrounded by the waterproof seal portion 51, and is electrically connected to the circuit board 60 via the terminal 140.

  The metal terminal 140 is insert-molded and integrated into the resin housing 200. Further, for example, the terminal 140 is partially disposed in a through hole 62 provided in the circuit board 60, that is, inserted into the through hole 62, and the wiring of the circuit board 60 is performed by a conductive connection member 63 such as solder. And are electrically connected.

  A drive circuit for rotating the blade portion 120 is formed on the fan circuit board 130. A coil in the shaft portion 110 is electrically connected to the fan circuit board 130. In the blower fan 100, when the coil is energized through the circuit board 60, the terminal 140, and the fan circuit board 130, the rotor described above rotates in the forward direction. In the blower fan 100, an air pressure difference is generated in the housing 200 due to the predetermined shape of the blade portion 120, and as shown in FIG. 3, the air sucked from the first vent 201 is sent from the second vent 212. Discharged. Note that when the blower fan 100 rotates the rotor in the direction opposite to the forward direction, the air sucked from the second vent 212 is discharged from the first vent 201.

  The fan circuit board 130 is disposed in the housing 200 below the blade portion 120, that is, on the circuit board 60 side. The fan circuit board 130 is fixed to the housing 200. In the present embodiment, a part of the fan circuit board 130 and the terminal 140 are embedded in the potting unit 150 and sealed with the potting unit 150. For this reason, a part of the fan circuit board 130 and the terminal 140 are protected by the potting unit 150. That is, the blower fan 100 can suppress liquid such as water from adhering to the fan circuit board 130 and the terminals 140 covered with the potting unit 150. In other words, the blower fan 100 is waterproofed by the potting unit 150.

  The potting portion 150 is provided in the housing 200 so as not to block the second vent 212 and to prevent the movement of the rotor such as the blade portion 120. In the present embodiment, as an example, an example in which the potting portion 150 is formed in a space from the bottom portion 220 to the second vent 212, that is, a space surrounded by the side wall end portion 211 on the bottom portion 220 is adopted. Yes.

  The fan circuit board 130 may be supported by a support portion different from the terminal 140. The fan circuit board 130 may be fixed to the inner surface of the bottom 220. Further, the sealing of the fan circuit board 130 is not limited to the potting portion 150. For example, the fan circuit board 130 on which the terminals 140 are mounted may be employed even if it is configured to be insert-molded in the housing 200 and sealed by the bottom 220.

  Next, an example of the assembly procedure of the engine ECU 10 will be described.

  First, the case 20, the cover 30, the circuit board 60, and the blower fan 100 are prepared. Then, the blower fan 100 is mounted on the circuit board 60. In this embodiment, the insertion mounting type terminal 140 is employed, the terminal 140 is inserted into the through hole 62 of the circuit board 60, and the circuit board 60 and the terminal 140 are electrically connected by the connection member 63. In this way, the circuit board 60 and the blower fan 100 are integrated.

  The connector 40 may be mounted on the circuit board 60 at the same timing as the blower fan 100, or may be mounted at a different timing from the blower fan 100. In the present embodiment, the circuit element 61 to be inserted and mounted, the connector 40, and the blower fan 100 are soldered at the same timing.

  Next, the circuit board 60 is attached to the case 20. For example, the case 20 has a pedestal (not shown) on the inner surface side of the wall portion 21, and the circuit board 60 is arranged on the pedestal and fixed with screws.

  When the circuit board 60 is attached, the blower fan 100 is also attached to the case 20. Before the circuit board 60 is placed on the base of the case 20, the seal member 50 is applied to the flange portion 221 and the side wall end portion 211. Further, a sealing member (not shown) is also applied to a portion of the peripheral portion of the case 20 where the housing of the connector 40 faces. The seal member 50 may be applied to a portion of the case 20 that faces the flange portion 221 and the side wall end portion 211.

  And the circuit board 60 is arrange | positioned on a base in the state which positioned the ventilation fan 100 with respect to the fan attachment opening part 25. FIG. Thereby, the seal member 50 is formed between the case 20 and the flange portion 221 or the side wall end portion 211. The seal member 50 contacts the case 20, the flange portion 221, and the side wall end portion 211. A waterproof seal 51 is formed by fixing the circuit board 60 to the case 20.

  Next, a seal member is applied to the peripheral portion of the case 20 and the portion of the connector 40 facing the cover 30, and then the cover 30 is assembled to the case 20. Thus, the engine ECU 10 described above can be obtained.

  Here, processing operations of the engine ECU 10 and the HVECU 320 will be described with reference to FIGS. 4 and 5.

  FIG. 4 shows the processing operation of the microcomputer 70 in the engine ECU 10. The microcomputer 70 starts the flowchart of FIG. 4 when power is supplied, for example, by turning on the ignition switch. The microcomputer 70 executes the flowchart of FIG. 4 every predetermined time while the power is supplied. Further, the microcomputer 70 executes the flowchart of FIG. 4 when traveling control is performed in the engine mode, for example.

  On the other hand, FIG. 5 shows the processing operation of the HVECU side microcomputer 322 in the HVECU 320. The HVECU-side microcomputer 322 starts the flowchart of FIG. 5 when power is supplied by turning on the ignition switch or the like. Then, the HVECU side microcomputer 322 executes the flowchart of FIG. 5 every predetermined time while the power is supplied.

  First, the processing operation of the microcomputer 70 will be described with reference to FIG. In step S10, the ECU temperature is measured (acquisition unit). The microcomputer 70 measures the ECU temperature using the ECU temperature sensor 73. That is, the microcomputer 70 acquires the detection result of the ECU temperature sensor 73.

  In step S11, it is determined whether ECU temperature <temperature threshold. The microcomputer 70 compares the detection result of the ECU temperature sensor 73 with the temperature threshold value, and determines whether ECU temperature <temperature threshold value. If the microcomputer 70 determines that the ECU temperature is less than the temperature threshold, the microcomputer 70 regards the engine ECU 10 as not being in a high temperature state and proceeds to step S13. If the microcomputer 70 does not determine that the ECU temperature <the temperature threshold, that is, if it determines that the ECU temperature ≧ the temperature threshold, the microcomputer 70 regards the engine ECU 10 as being in a high temperature state and proceeds to step S12.

  In step S13, the ECU temperature is transmitted (transmission unit). The microcomputer 70 transmits the ECU temperature to the HVECU 320 via the communication device 75. When the ECU temperature is equal to or higher than the temperature threshold, the microcomputer 70 transmits the ECU temperature to the HVECU 320 in order to limit the traveling state of the vehicle accompanying the traveling control by the microcomputer 70. In the present embodiment, an example in which the ECU temperature is transmitted is adopted. However, the present disclosure is not limited to this, and may be anything that transmits temperature information correlated with the detection result of the ECU temperature sensor 73 to the HVECU 320 via the communication device 75. Therefore, the microcomputer 70 may transmit the determination result in the ECU temperature determination unit.

  In step S12, fail-safe processing is executed (restriction unit, first restriction unit). The microcomputer 70 performs throttle cut as one of fail-safe processes. More specifically, the microcomputer 70 performs a throttle cut by making a throttle cut request to the throttle driver 72, for example. Thus, the microcomputer 70 restricts the traveling state of the vehicle accompanying the traveling control by the microcomputer 70 when ECU temperature ≧ temperature threshold. That is, the microcomputer 70 restricts the traveling state of the vehicle accompanying the traveling control in the engine mode.

  Note that if the determination is NO in step S11, the microcomputer 70 may drive the blower fan 100 to cool the case 20 and thus the circuit board 60 because the engine ECU 10 is in a high temperature state. That is, when the microcomputer 70 determines that the engine ECU 10 is in a high temperature state, the microcomputer 70 rotates the blade portion 120 of the blower fan 100 to supply air to the case 20 from the second vent 212.

  Next, the processing operation of the HVECU side microcomputer 322 will be described with reference to FIG. In step S20, the ECU temperature is received. The HVECU side microcomputer 322 receives the ECU temperature transmitted from the microcomputer 70 via the HVECU side communication device 321.

  In step S21, it is determined whether or not the ECU is in a high temperature state. The HVECU side microcomputer 322 determines whether or not the ECU is in a high temperature state by comparing the ECU temperature with a temperature threshold value. If the HVECU-side microcomputer 322 determines that the ECU temperature is equal to or higher than the temperature threshold, the HVECU-side microcomputer 322 considers that the ECU is in a high temperature state and proceeds to step S22. On the other hand, if the HVECU-side microcomputer 322 does not determine that the ECU temperature is equal to or higher than the temperature threshold, the HVECU-side microcomputer 322 determines that the ECU is not in a high temperature state and returns to step S20. The HVECU-side microcomputer 322 can determine whether or not the ECU is in a high temperature state without performing comparison with the temperature threshold when receiving the determination result in the ECU temperature determination unit as temperature information.

  In step S22, a lighting request is made to the meter ECU 330. The HVECU side microcomputer 322 makes a lighting request to the meter ECU 330 via the HVECU side communication device 321. The HVECU-side microcomputer 322 requests the meter ECU 330 to turn on in order to notify the driver that the ECU is in a high temperature state, switching to an EV mode, which will be described later, or switching to the EV mode because the ECU is in a high temperature state. I do.

  The HVECU 320 can prompt the driver to check the ECU 10 by notifying the driver that the ECU is in a high temperature state. Further, the HVECU 320 can make the driver recognize the traveling mode by informing the driver of switching to the EV mode.

  The notification to the driver using the meter ECU 330 is not limited to lighting, and may be blinking, character display, image display, or the like. The notification to the driver may be notification by sound such as voice. Further, the HVECU 320 may not perform notification to the driver.

  In step S23, the mode is switched to the EV mode. The HVECU side microcomputer 322 switches the travel mode from the engine mode to the EV mode (second restriction unit). This is to prevent the unintended traveling state from being caused by the microcomputer 70 traveling control in the ECU high temperature state. That is, the HVECU-side microcomputer 322 switches to the EV mode in order to prevent the microcomputer 70 from causing trouble in the traveling control by the microcomputer 70 and causing an unintended traveling state. Further, it can be said that the HVECU-side microcomputer 322 switches to the EV mode in order to prevent the travel control by the microcomputer 70 from causing a trouble and causing an unintended travel state. The HVECU side microcomputer 322 limits the traveling state associated with the traveling control by the microcomputer 70 by switching the traveling mode from the engine mode to the EV mode.

  In this way, when the detection result of the ECU temperature sensor 73 that detects the ECU temperature is equal to or higher than the temperature threshold, the engine ECU 10 restricts the traveling state of the vehicle associated with the traveling control by the microcomputer 70, so that the unintended traveling state is established. This can be suppressed.

  Further, the electronic control system transmits the ECU temperature to the HVECU 320 via the communication device 75. And HVECU320 restrict | limits the driving | running | working state of the vehicle accompanying driving | running | working control by the microcomputer 70, when it determines with it being ECU temperature> = temperature threshold value based on transmitted ECU temperature. Therefore, the electronic control system can further suppress the unintended traveling state. That is, in the electronic control system, even if the engine ECU 10 cannot perform the fail-safe process, the HVECU 320 can limit the traveling state of the vehicle accompanying the traveling control by the microcomputer 70.

  In the engine ECU 10, the blower fan 100 and the circuit board 60 are electrically connected via a terminal 140 that protrudes from the position surrounded by the waterproof seal portion 51 into the internal space S1. For this reason, the engine ECU 10 does not need to electrically connect an electronic device or the like provided in a vehicle different from the circuit board 60 and the blower fan 100, and can restrain the vehicle side from being subjected to mounting restrictions. Further, the engine ECU 10 connects the circuit board 60 and the blower fan 100 via a wire harness or the like provided outside the waterproof casing, or sends air to an electronic device or the like provided in a vehicle different from the circuit board 60. There is no need to electrically connect the fan 100 directly. Therefore, the engine ECU 10 can suppress the mounting restrictions on the vehicle side. As a result, the engine ECU 10 can simplify the configuration and reduce the physique. Furthermore, the engine ECU 10 can reduce the man-hour when the blower fan 100 is electrically connected to the circuit board 60.

  The blower fan 100 forcibly creates an air flow to cool the case 20. For this reason, it can be said that the engine ECU 10 to which the blower fan 100 is attached has better heat dissipation performance than the electronic control unit to which only the heat dissipation fins are attached. That is, when the area occupied by the waterproof housing is the same, the engine ECU 10 to which the blower fan 100 is attached has better heat dissipation performance than the electronic control device to which only the heat dissipation fins are attached. Conversely, when comparing electronic control units having the same heat dissipation performance, the area required by the waterproof casing of the engine ECU 10 to which the blower fan 100 is attached is the area occupied by the waterproof casing of the electronic control unit to which only the radiation fins are mounted. Smaller than. Therefore, engine ECU10 can make a physique smaller than the case where a radiation fin is provided in order to ensure the same cooling performance as blower fan 100.

  In order to cool the waterproof casing and the circuit board, it is also conceivable that engine cooling water or the like is disposed around the waterproof casing and cooled with the engine cooling water. Further, in order to cool the waterproof casing and the circuit board, it is conceivable to arrange an electronic control device at a position where the wind from the radiator fan is hit and cool the wind with the wind from the radiator fan.

  However, the engine ECU 10 attaches the blower fan 100 to the case 20 as described above, and performs cooling with the blower fan 100. For this reason, it is not necessary for the engine ECU 10 to place engine cooling water around the waterproof housing or to place the engine ECU 10 at a position where the wind from the radiator fan hits, and to impose mounting restrictions on the vehicle side. Can be suppressed.

  It is also conceivable that the blower fan 100 is disposed on the wall portion 21 in a state where the rotation axis of the blade portion 120 is orthogonal to the Z direction. However, in the engine ECU 10, the rotation axis is arranged on the wall portion 21 in a state where the rotation axis matches the plate thickness direction of the circuit board 60. For this reason, engine ECU10 can make the physique of a Z direction smaller than the case where it arrange | positions in the wall part 21 in the state in which a rotating shaft orthogonally crosses the Z direction.

  In particular, in this embodiment, a part of the blower fan 100 is disposed in the fan mounting opening 25. Therefore, the engine ECU 10 can further reduce the physique in the Z direction. Furthermore, since a part of the blower fan 100 is disposed in the internal space S1, the engine ECU 10 can further reduce the physique in the Z direction.

  Further, in the engine ECU 10, the blower fan 100 and the case 20 are assembled so that the flange portion 221 of the housing 200 faces the inner surface of the wall portion 21. Therefore, the engine ECU 10 can assemble the case 20 to the blower fan 100 after mounting the blower fan 100 on the circuit board 60. Thus, the engine ECU 10 can easily insert the terminal 140 exposed from the blower fan 100 into the through hole 62 of the circuit board 60. Further, the engine ECU 10 can handle the blower fan 100 as one of electronic components mounted on the circuit board 60, and can simplify the assembly.

  The engine ECU 10 can attach the blower fan 100 to the case 20 without changing the outer shape of the cover 30, the outer shape of the circuit board 60, and the manufacturing process with respect to the configuration in which cooling is performed by the heat radiating fins provided in the case 20. .

  In the engine ECU 10, since the circuit board 60 is accommodated in the waterproof casing, the heat generated from the circuit board 60 is radiated to the waterproof casing. And since the air flow along an outer surface is formed by the blower fan 100, the engine ECU 10 can promote heat dissipation of the waterproof casing. Since the engine ECU 10 cools the circuit board 60 with the wind generated by the blower fan 100, the engine ECU 10 can cool the waterproof casing or the circuit board 60 more rapidly than the configuration in which the waterproof casing or the circuit board 60 is cooled by the heat radiating fins. it can.

  That is, in the present embodiment, the blower fan 100 is attached to the case 20 so that the rotation axis of the blade portion 120 substantially coincides with the Z direction that is the thickness direction of the circuit board 60. In the housing 200, the first vent 201 and the second vent are located at different positions in the Z direction so that an air flow along the outer surface of the case 20 is formed as the blade portion 120 rotates. 212 is formed. For this reason, the case 20 and by extension, the circuit board 60 can be efficiently cooled by the blower fan 100.

  In particular, in the present embodiment, the first vent 201 is a suction port, and the second vent 212 is a discharge port. According to this, the flow velocity on the outer surface of the case 20 can be increased even at the same rotational speed as compared with the configuration in which the second vent 212 is a suction port and the first vent 201 is a discharge port. That is, the temperature of the case 20 and thus the circuit board 60 can be lowered. This point has been confirmed by simulation.

  As described above, in a configuration in which no through hole is provided in the bottom wall of the case, a connector is provided in the cooling device, and electrical connection is performed outside the waterproof housing. For this reason, the harness connected to the connector is disposed on the outer surface of the case, which hinders cooling. That is, the arrangement of the heating elements that are electronic components is also limited. On the other hand, in this embodiment, the terminal 140 of the blower fan 100 is connected to the circuit board 60. Therefore, since there is no hindrance to the above-described connector or harness, the degree of freedom of arrangement of the circuit element 61 can be improved.

  As described above, since there is no hindrance to the connector and the harness, in the present embodiment, the second ventilation holes 212 are formed in all the four side walls 210 of the housing 200. Thereby, the air sucked from the first vent 201 spreads in all directions on the outer surface of the case 20. Therefore, the case 20 can be effectively cooled. Further, since the engine ECU 10 includes the waterproof seal portion 51, the waterproof property of the waterproof casing can be ensured while the blower fan 100 and the circuit board 60 are electrically connected.

  In this embodiment, a liquid adhesive is used as the seal member 50 before curing. However, the seal member 50 is not limited to this, and may be a member that seals the periphery of the fan mounting opening 25 in a watertight manner by elastic deformation. The seal member 50 is an O-ring, an annular rubber sheet, or the like, is provided at a position surrounding the fan mounting opening 25, and is sandwiched between the housing 200 and the case 20 and elastically deformed, whereby the fan mounting opening 25. Seal around the watertight. In this case, the engine ECU 10 preferably includes a fixing mechanism that fixes the blower fan 100 to the case 20.

  In the present embodiment, an engine ECU 10 mounted on a vehicle equipped with an engine and a travel motor is employed as a travel drive source. However, the present disclosure is not limited to this. The engine ECU 10 may not be mounted with a traveling motor but may be mounted on a vehicle equipped with an engine as a traveling drive source.

  Furthermore, the engine ECU 10 may not be mounted with an engine as a travel drive source, but may be mounted on a vehicle (electric vehicle) equipped with a travel motor. In this case, the electronic control unit controls the traveling motor. The electronic control device limits the travel control by the microcomputer 70 by applying a brake.

  In the present embodiment, the engine ECU 10 in which the blower fan 100 is attached to the case 20 is employed. However, the present disclosure is not limited to this, and the blower fan 100 may be provided separately from the case 20 and the cover 30.

  In this embodiment, the example in which the circuit board 130 for fans was provided in the ventilation fan 100 was employ | adopted. However, the present disclosure is not limited to this, and the fan circuit board 130 may be provided on the circuit board 60.

  In this embodiment, the example which restrict | limits the driving | running | working state accompanying the driving control by the microcomputer 70 by switching driving mode from engine mode to EV mode was employ | adopted. However, the present disclosure is not limited to this, and the traveling state associated with the traveling control by the microcomputer 70 may be limited by strengthening the regenerative brake.

  The preferred embodiments of the present disclosure have been described above. However, the present disclosure is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present disclosure. Hereinafter, as other embodiments of the present disclosure, modifications 1 and 2 will be described. The above embodiment and Modifications 1 and 2 can be implemented independently, but can also be implemented in appropriate combination. The present disclosure is not limited to the combinations shown in the embodiments, and can be implemented by various combinations.

(Second Embodiment)
A second embodiment of the engine ECU 10 and the electronic control system will be described with reference to FIGS. Since the engine ECU 10 of the present embodiment has many parts similar to the engine ECU 10 of the above embodiment, the same reference numerals as those of the above embodiment are used for convenience. 6 and 7, the same step numbers are assigned to the same processes as those in FIGS. 4 and 5.

  The engine ECU 10 of the present embodiment is different from the engine ECU 10 of the above-described embodiment in that it diagnoses whether or not the blower fan 100 is out of order, and the diagnosis result is transmitted to the HVECU 320. The HVECU 320 is different from the HVECU 320 of the above embodiment in that it determines whether or not to switch to the EV mode in consideration of the diagnosis result.

  In step S14, a failure of the blower fan is confirmed (failure diagnosis unit). The microcomputer 70 diagnoses whether or not the blower fan 100 has failed. A method for diagnosing whether or not the blower fan 100 is broken is not particularly limited. For example, the microcomputer 70 can make a diagnosis using the rotational speed of the motor of the blower fan 100, the ECU temperature, and the like when the blower fan 100 is requested to be driven.

  In step S11a, it is determined whether (ECU temperature <temperature threshold) or the blower fan is normal. When the microcomputer 70 determines that the ECU is in a high temperature state, or determines that the blower fan 100 has failed, the microcomputer 70 proceeds to step S12. If the microcomputer 70 determines that the ECU is not in a high temperature state and the blower fan 100 is not broken, the microcomputer 70 proceeds to step S13a.

  In step S13a, the ECU temperature and the diagnosis result of the blower fan are transmitted. The microcomputer 70 transmits the ECU temperature and the diagnosis result to the HVECU 320 via the communication device 75. The microcomputer 70 transmits the ECU temperature and the diagnosis result to the HVECU 320 in order to limit the traveling state of the vehicle accompanying the traveling control by the microcomputer 70 when the ECU temperature is equal to or higher than the temperature threshold and the blower unit is broken. To do.

  Note that the microcomputer 70 may transmit the determination result in the ECU temperature determination unit as described in the above embodiment. Further, the microcomputer 70 may transmit failure information correlated with the diagnosis result instead of the diagnosis result. That is, the microcomputer 70 transmits the diagnosis result and information that can diagnose the failure of the blower fan 100 as the failure information.

  On the other hand, as shown in FIG. 7, the HVECU 320 determines whether or not the ECU high temperature state and the blower fan have failed in step S21a. That is, the HVECU side microcomputer 322 determines whether or not the ECU is in a high temperature state by comparing the ECU temperature with the temperature threshold value. Further, the HVECU side microcomputer 322 determines whether or not the blower fan 100 has failed based on the diagnosis result. If the HVECU-side microcomputer 322 determines that the ECU temperature ≧ the temperature threshold, and determines that the blower fan 100 has failed, the process proceeds to step S22. Further, if the HVECU side microcomputer 322 does not determine that the ECU temperature ≧ the temperature threshold, or does not determine that the blower fan 100 has failed, the process returns to step S20.

  As a result, the engine ECU 10 and the electronic control system can achieve the same effects as in the above embodiment. Furthermore, engine ECU10 can suppress switching to EV mode only by being in ECU high temperature state. The same effect can be achieved with respect to the electronic control system.

(Third embodiment)
A third embodiment of the engine ECU 10 and the electronic control system will be described with reference to FIG. Since the electronic control system of this embodiment has many parts similar to those of the above embodiment, the same reference numerals as those of the above embodiment are used for convenience. Further, in FIG. 8, the same step numbers are assigned to the same processes as in FIG.

  In the electronic control system of this embodiment, an ATECU is electrically connected to the engine ECU 10 instead of the HVECU 320. ATECU corresponds to a second electronic control unit and an external control device. The AT ECU is an electronic control device that controls the transmission of the vehicle.

  In step S23a, the ATECU fixes the transmission to the third speed (second limiting unit). That is, when the AT ECU determines that the ECU is in a high temperature state, the AT ECU fixes the transmission to the third speed. Thus, engine ECU10 restrict | limits the driving | running | working state accompanying driving | running | working control by the microcomputer 70 by fixing a transmission to 3rd speed via ATTEC.

  As a result, the engine ECU 10 and the electronic control system can achieve the same effects as in the above embodiment.

(Fourth embodiment)
A fourth embodiment of the electronic control system will be described with reference to FIG. Since the electronic control system of this embodiment has many parts similar to those of the above embodiment, the same reference numerals as those of the above embodiment are used for convenience. Also, in FIG. 9, the same step number is assigned to the same process as in FIG.

  In step S21b, the HVECU 320 determines whether or not the ECU high temperature state or communication is interrupted. The HVECU side microcomputer 322 determines whether or not the ECU is in a high temperature state by comparing the ECU temperature with the temperature threshold value, as in the above embodiment. Further, the HVECU side microcomputer 322 uses the HVECU side communication device 321 to determine whether or not communication with the engine ECU 10 is interrupted. The method for determining communication interruption is not particularly limited. For example, the HVECU-side microcomputer 322 determines that communication is interrupted when data periodically transmitted from the communication device 75 to the HVECU-side communication device 321 cannot be received. Further, the HVECU side microcomputer 322 determines that communication has been interrupted when the HVECU side communication device 321 makes a transmission request to the communication device 75 and there is no reply from the communication device 75.

  Then, the HVECU side microcomputer 322 not only proceeds to steps S21 and S22 when it is determined that ECU temperature ≧ temperature threshold, but also proceeds to steps S21 and S22 when it is determined that communication is interrupted. That is, the HVECU side microcomputer 322 switches to the EV mode even when it is determined that the communication is interrupted, that is, restricts the traveling state associated with the traveling control by the microcomputer 70.

  As a result, the electronic control system can achieve the same effects as those of the above embodiment. Further, the electronic control system can limit the traveling state associated with the traveling control by the microcomputer 70 even when the engine ECU 10 cannot transmit the ECU temperature in the ECU high temperature state.

  DESCRIPTION OF SYMBOLS 10 ... Engine ECU, 20 ... Case, 21 ... Wall part, 22 ... Connector attaching part, 23 ... Car body fixing part, 24 ... Housing fixing hole, 25 ... Fan attaching opening part, 30 ... Cover, 31 ... Radiation fin, 40 DESCRIPTION OF SYMBOLS ... Connector, 50 ... Seal member, 51 ... Waterproof seal part, 60 ... Circuit board, 61 ... Circuit element, 62 ... Through hole, 63 ... Connection member, 70 ... Microcomputer, 71 ... Monitoring IC, 72 ... Throttle drive driver, 73 ... ECU temperature sensor, 75 ... Communication device, 100 ... Blower fan, 110 ... Shaft, 111 ... Rotating shaft, 120 ... Blade, 130 ... Fan circuit board, 140 ... Terminal, 150 ... Potting part, 160 ... Motor, 200 DESCRIPTION OF SYMBOLS ... Housing 201 ... 1st ventilation hole, 210 ... Side wall, 211 ... Side wall edge part, 212 ... 2nd ventilation hole, 220 ... Bottom part, 221 ... Flange part, 31 ... electronic throttle device, 320 ... HVECU, 321 ... HVECU side communication device, 322 ... HVECU side microcomputer, 330 ... meter ECU

Claims (6)

An electronic control device mounted on a vehicle,
A housing (20);
A blower unit (100) that forms a flow of air on the outer surface side of the casing by rotating the blade portion (120), and cools the casing;
A temperature detector (73) for detecting the temperature in the housing;
A control unit (70) housed in the housing and performing drive control of the blower unit and travel control of the vehicle,
The controller is
An acquisition unit (S10) for acquiring a detection result of the temperature detection unit;
An electronic control device, comprising: a restriction unit (S12) that restricts a traveling state of the vehicle associated with the traveling control when the detection result is equal to or greater than a threshold value. A communication device (75) for communicating with an external control device (320) provided outside the electronic control device,
The external control device restricts the traveling state when the detection result is determined to be equal to or greater than a threshold based on temperature information correlated with the detection result,
The control unit includes a transmission unit (S13) that transmits the temperature information to the external control device via the communication device in order to limit the traveling state when the detection result is equal to or greater than a threshold value. The electronic control device according to claim 1. A communication device (75) for communicating with an external control device (320) provided outside the electronic control device,
The control unit has a failure diagnosis unit (S14) for diagnosing whether or not the blower unit has failed,
The external control device determines that the detection result is equal to or greater than a threshold based on temperature information correlated with the detection result, and the blower unit fails based on failure information correlated with the diagnosis result of the failure diagnosis unit. When the determination is made, the running state is limited,
The control unit sends the temperature information and the failure information via the communication device in order to limit the traveling state when the detection result is equal to or greater than a threshold value and the air blowing unit is out of order. The electronic control device according to claim 1, further comprising a transmission unit (S13a) that transmits to the external control device. An electronic control system mounted on a vehicle and comprising a first electronic control device (10) and a second electronic control device (320),
The first electronic control unit includes:
A housing (20);
A blower unit (100) that forms a flow of air on the outer surface side of the casing by rotating the blade portion (120), and cools the casing;
A temperature detector (73) for detecting the temperature in the housing;
A first control unit (70) housed in the housing and performing drive control of the blower unit and travel control of the vehicle;
A first communication device (75) that communicates with the second electronic control device,
The first controller is
An acquisition unit (S10) for acquiring a detection result of the temperature detection unit;
A first restriction unit (S12) for restricting a traveling state of the vehicle associated with the traveling control when the detection result is equal to or greater than a threshold;
A transmission unit (S13, S13a) for transmitting temperature information correlated with the detection result to the second electronic control unit via the first communication device;
The second electronic control unit is
A second communication device (321) for communicating with the first communication device;
A second control unit (322) for limiting the traveling state based on the temperature information,
The second controller is
An electronic control system comprising: a second restriction unit (S23, S23a) that restricts the traveling state when the detection result is determined to be equal to or greater than the threshold value based on the temperature information. The first control unit has a failure diagnosis unit (S14) for diagnosing whether or not the blower unit has failed,
The transmission unit transmits failure information correlated with a diagnosis result of the failure diagnosis unit to the second electronic control unit via the first communication device, in addition to the temperature information.
5. The electronic control system according to claim 4, wherein the second restriction unit restricts the traveling state when it is determined that the detection result is equal to or greater than the threshold value and the blower unit is malfunctioning.   The electronic control system according to claim 4, wherein the second restriction unit restricts the traveling state even when communication with the first communication device by the second communication device is interrupted.

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