control device

Abstract

The present application provides a control device which, when an abnormality occurs in a component of exhaust gas, can prompt a user to take remedial measures and suppress malfunction of parts around an engine. The control device controls an engine in a vehicle having a main relay which connects a cooling device and a battery. The control device displays a travelable distance when an abnormality occurs in a component contained in exhaust gas of the engine, the travelable distance being a distance from when the abnormality is determined to occur until a travel distance reaches a predetermined distance. The control device, in a state where the travelable distance is zero and in a case where a switch of a system is off, executes startup restriction control of continuing operation of the cooling device until a request for operation of the cooling device disappears, after stopping the operation of the cooling device, disconnecting the main relay, and maintaining a state where the main relay is disconnected even when the switch of the system is on, thereby not starting the engine.

Description

Technical Field

[0001] This invention relates to a control device. Background Technology

[0002] Patent Document 1 describes a control device for an engine in a vehicle. This control device maintains the connection of the main relay after the engine has stopped, during the period when a water pump operation request exists, and for a certain period after the operation request has ceased, thereby continuing to operate the water pump. Thus, the control device prevents component failure in the high-temperature environment after the engine has finished running.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2022-053989 Summary of the Invention

[0004] In cases where abnormalities occur in the components contained in the exhaust due to reasons such as malfunction of the exhaust purification device, it is desirable to take measures to rectify the abnormality as soon as possible.

[0005] Therefore, the following can be considered: display the drivable distance, which is the distance from when an anomaly is detected until the drivable distance reaches a predetermined distance. When the drivable distance becomes zero and the engine is stopped, the engine should be prohibited from restarting. However, if the main relay is disconnected immediately after the engine stops running, it is assumed that parts will malfunction in the high-temperature environment immediately after the engine's operation ends.

[0006] The control device for solving the above-mentioned problem controls the engine in a vehicle having a main relay connected to multiple devices including a cooling system for cooling the engine and a battery. When an abnormality occurs in the components contained in the engine exhaust, the control device displays a drivable distance, which is the distance from when the abnormality is determined to have occurred until a predetermined distance is reached. When the drivable distance becomes zero, thus satisfying the start-up constraint condition, and with the system switch off, the control device performs the following start-up constraint control: continues operating the cooling system until the cooling system's operation request disappears; after stopping the cooling system, disconnects the main relay, maintaining the main relay disconnected even when the system switch is on, thereby preventing the engine from starting.

[0007] Invention Effects

[0008] When an abnormality occurs in the exhaust composition, the aforementioned control device can prompt the user to take corrective measures and suppress malfunctions in parts surrounding the engine. Attached Figure Description

[0009] Figure 1This is a schematic diagram showing the structure of an internal combustion engine system including a control device according to one embodiment.

[0010] Figure 2 It means possessing Figure 1 A schematic diagram showing the connection relationships between various devices and batteries in a vehicle with an internal combustion engine system.

[0011] Figure 3 This means that the operation will be carried out based on the vehicle's travel distance. Figure 1 A diagram showing how the control device processes data.

[0012] Figure 4 It means Figure 1 The flowchart describes the series of processes performed by the control device when controlling the electronic control device after the system is switched off.

[0013] Figure 5 It means Figure 1 The flowchart describes the process of a series of procedures performed by the control device when controlling the cooling equipment after the system is switched off.

[0014] Figure 6 It is a timing diagram showing the state changes of (a) ignition switch, (b) hydraulic control ECU, (c) valve ECU, (d) radiator fan, (e) water pump and (f) main relay. Detailed Implementation

[0015] The following is for reference. Figures 1-6 One embodiment of the control device will be described.

[0016] <Structure of Internal Combustion Engine System 100>

[0017] The internal combustion engine system 100 is installed in the vehicle. For example... Figure 1 As shown, the internal combustion engine system 100 includes an engine 13. The engine 13 may be, for example, a gasoline engine that uses gasoline as fuel. The engine 13 may also be a diesel engine that uses light oil as fuel. The engine 13 may also be a hydrogen engine that uses hydrogen as fuel.

[0018] like Figure 1 As shown, the internal combustion engine system 100 includes an exhaust purification device 15 midway through the exhaust pipe 14 of the engine 13. The exhaust purification device 15 removes nitrogen oxides (NOx) contained in the exhaust gas. x Exhaust gas purification device 15, for example, uses a three-way catalytic converter to remove NO. x A three-way catalytic converter, etc. Exhaust gas purification device 15 can also, for example, use ammonia as a reducing agent to reduce NO in the exhaust gas. x Selective reduction catalyst.

[0019] like Figure 1As shown, a nitrogen oxide sensor 20 is installed in the exhaust pipe 14, downstream of the exhaust purification device 15. The nitrogen oxide sensor 20 measures the NO content in the exhaust gas passing through the exhaust purification device 15. x The concentration.

[0020] like Figure 1 As shown, the internal combustion engine system 100 includes a first intake manifold 16, a turbocharger 17, and a second intake manifold 18.

[0021] The engine 13 draws in air from outside the vehicle through the first intake pipe 16.

[0022] The turbocharger 17 is connected to the first intake pipe 16, the second intake pipe 18, and the exhaust pipe 14. The turbocharger 17 includes a turbine and a compressor. The turbine is located within the exhaust pipe 14. The compressor's inlet is connected to the first intake pipe 16. The compressor's outlet is connected to the second intake pipe 18. In the turbocharger 17, the turbine rotates by receiving exhaust gas flowing within the exhaust pipe 14, thereby operating the compressor. This compresses the air passing through the first intake pipe 16. The air compressed by the turbocharger 17 is then fed into the second intake pipe 18.

[0023] like Figure 1 As shown, the second intake pipe 18 is connected to the engine 13. The second intake pipe 18 supplies the engine 13 with air compressed by the turbocharger 17.

[0024] like Figure 1 As shown, a throttle valve 19 is located midway through the second intake manifold 18. The throttle valve 19 controls the amount of air drawn into the engine 13. The throttle valve 19 is an electronically controlled throttle valve whose opening is controlled by the valve ECU 52 (described later) based on the throttle operation performed by the vehicle user.

[0025] like Figure 1 As shown, an intercooler 21 is located in the portion of the second intake manifold 18 downstream of the throttle valve 19. The intercooler 21 cools the air supplied to the engine 13 through the second intake manifold 18.

[0026] like Figure 1 As shown, the internal combustion engine system 100 includes a control device 10. The control device 10 includes a processing circuit 11 and a storage device 12. The storage device 12 stores programs. The processing circuit 11 performs various processes by executing the programs stored in the storage device 12.

[0027] Control device 10 controls engine 13. Control device 10 controls, for example, the amount of fuel injected into engine 13. Control device 10 controls, for example, the ignition timing in engine 13.

[0028] like Figure 1As shown, the control device 10 is communicatively connected to the nitrogen oxide sensor 20. The control device 10 acquires the output value of the nitrogen oxide sensor 20 via communication.

[0029] <Connection relationship between the vehicle's equipment and battery 30>

[0030] The vehicle is equipped with a battery 30. The battery 30 supplies power to various devices in the vehicle. Figure 2 This indicates the connection relationship between battery 30 and multiple devices.

[0031] Battery 30 is connected to multiple devices via main relay 31 and power line 32. Battery 30 is connected to power line 32 via main relay 31.

[0032] While the main relay 31 is in the ON state, the battery 30 is connected to the power line 32 via the main relay 31. If the battery 30 is connected to the power line 32, power is supplied from the battery 30 to the device connected to the power line 32.

[0033] When the main relay 31 is in the closed state, disconnecting the main relay 31 disconnects the connection between the battery 30 and the power line 32. During the period when the main relay 31 is in the closed state, the battery 30 does not supply power to the device connected to the power line 32.

[0034] The control device 10 can control the main relay 31. During periods when the main relay 31 needs to be turned on, the control device 10 periodically sends an operating signal to the platform of the main relay 31. While receiving the operating signal from the control device 10, the platform of the main relay 31 keeps the main relay 31 in an on state. When the platform of the main relay 31 does not receive an operating signal from the control device 10 for a certain period of time, the platform turns the main relay 31 off.

[0035] The vehicle user can switch the vehicle's system on / off state via the ignition switch. When the vehicle's system is switched on, the control device 10 sends an operation signal to activate the main relay 31.

[0036] like Figure 2 As shown, a radiator fan 42, a water pump 43, a hydraulic control ECU 51, and a valve ECU 52 are connected to the power cord 32. The devices connected to the power cord 32 can operate when powered by the battery 30.

[0037] The hydraulic control ECU51 and valve ECU52 are electronic control devices found in the vehicle. ECU is an abbreviation for Electronic Control Unit.

[0038] The hydraulic control ECU51 controls devices equipped with hydraulic mechanisms. Examples of devices with hydraulic mechanisms include continuously variable transmissions (CVTs). Figure 2 As shown, the hydraulic control ECU 51 is communicatively connected to the hydraulic sensor 50. The hydraulic sensor 50 measures the hydraulic pressure in the hydraulic mechanism. The hydraulic control ECU 51 controls the device equipped with the hydraulic mechanism based on the output value of the hydraulic sensor 50.

[0039] The hydraulic control ECU 51 begins operation when the vehicle's system is switched on. During operation, the hydraulic control ECU 51 performs learning control. Learning control involves learning the state of the equipment present in the vehicle. Specifically, the hydraulic control ECU 51, as the learning control, learns the state of the hydraulic pressure in the device. Specifically, the hydraulic control ECU 51, as the learning control, learns and stores changes in the output value of the hydraulic sensor 50, the state of the device when the output value of the hydraulic sensor 50 is zero, etc.

[0040] like Figure 2 As shown, valve ECU 52 is communicatively connected to throttle valve 19. Valve ECU 52 controls the opening of throttle valve 19 based on the throttle input performed by the vehicle user.

[0041] The valve ECU 52 begins operation when the vehicle's system is switched on. During operation, the valve ECU 52 performs diagnostic control. This diagnostic control involves recording its own anomalies through a self-diagnostic function. For example, the valve ECU 52 records an anomaly if the amount of air intake into the engine 13 is too much or too little relative to the opening requested by the throttle valve 19.

[0042] The radiator fan 42 and water pump 43 start operating when the vehicle's system is switched on. The radiator fan 42 and water pump 43 are cooling devices for cooling the engine 13. The radiator fan 42 and water pump 43 are located in the cooling system 40.

[0043] Figure 2 The cooling system 40 is shown in the diagram. Figure 2 In the diagram, the dashed lines in the cooling system 40 represent the path of the cooling water. The water pump 43 circulates the cooling water within the cooling system 40.

[0044] Cooling water pumped by water pump 43 passes through radiator 41 and radiator fan 42. Radiator 41 and radiator fan 42 cool the cooling water.

[0045] like Figure 2 As shown, in the cooling system 40, the turbocharger 17 and the intercooler 21 are arranged side by side. The cooling water passing through the radiator 41 and the radiator fan 42 merges with the cooling water passing through the other device after passing through either the turbocharger 17 or the intercooler 21.

[0046] Cooling water through turbocharger 17 cools turbocharger 17 by exchanging heat with turbocharger 17. Cooling water through intercooler 21 cools air passing through intercooler 21 by exchanging heat with air passing through intercooler 21. Thus, intercooler 21 cools the air supplied to engine 13 through second intake manifold 18.

[0047] The coolant from the engine 13, after passing through the turbocharger 17 or intercooler 21, flows through the engine 13's water jacket. The coolant passing through the engine 13's water jacket cools the engine 13 by exchanging heat with it. The coolant then reaches the water pump 43.

[0048] Thus, the cooling system 40 suppresses the temperature rise around the engine 13 by circulating the cooling water.

[0049] <Overview of Startup Restriction Control>

[0050] The control device 10 performs start-limit control. The start-limit control is as follows: if the vehicle's system switch is turned off after certain conditions are met, the engine 13 will not start even if the system switch is turned on later.

[0051] Figure 3 This indicates the method by which the control device 10 processes the vehicle based on its travel distance.

[0052] Control device 10 monitors the components contained in the exhaust gas while the vehicle is in motion. Specifically, control device 10 monitors the output value of nitrogen oxide sensor 20. When the output value of nitrogen oxide sensor 20 is above a predetermined value, control device 10 determines that an abnormality has occurred in the components contained in the exhaust gas of engine 13.

[0053] Control device 10 measures the distance the vehicle has traveled since the anomaly was determined to have occurred. For example... Figure 3 As shown, after the control device 10 determines that an anomaly has occurred, it begins to display the drivable distance when the vehicle has traveled more than 400 km. The drivable distance refers to the distance from the occurrence of the anomaly until the vehicle reaches a predetermined distance. The drivable distance is updated as the vehicle travels. Figure 3 As shown, the predetermined distance is 2800 km. The control device 10 displays the drivable distance, for example, on a display showing the speedometer in the vehicle or a display on a car navigation system. By displaying the drivable distance, the control device 10 prompts maintenance, repair, or other corrective measures to be performed before executing the start-limit control.

[0054] like Figure 3As shown, after an anomaly is detected, the starting restriction condition is met when the vehicle has traveled a predetermined distance of 2800 km. In other words, the starting restriction condition is met when the drivable distance becomes zero. The control device 10 performs starting restriction control when the starting restriction condition is met and the system switch is off.

[0055] In the start-limit control, the control device 10 keeps the main relay 31 in the off state. Furthermore, in the start-limit control, the control device 10 prohibits fuel injection or ignition based on the ignition plug in the engine 13. Subsequently, even if the system switch in the vehicle is turned on, the control device 10 maintains the main relay 31 in the off state, thereby preventing the engine 13 from starting.

[0056] <Methods for controlling the electronic control device after the system is switched off>

[0057] The control device 10 is communicatively connected to the hydraulic control ECU 51 and the valve ECU 52. The control device 10 controls the operation of the hydraulic control ECU 51 and the valve ECU 52.

[0058] As described above, the hydraulic control ECU 51 begins operation when the vehicle's system is switched on. After the hydraulic control ECU 51 begins operation, the control device 10 periodically sends operation signals to the hydraulic control ECU 51 during the period when the system is switched on. The hydraulic control ECU 51 continues operation while periodically receiving operation signals from the control device 10.

[0059] Even after the system is switched off, the hydraulic control ECU 51 continues learning control as long as it remains operational. Then, upon completion of the learning control, the hydraulic control ECU 51 sends a completion notification to the control device 10 indicating that the learning control is complete.

[0060] As described above, valve ECU 52 begins operation when the vehicle's system is switched on. After valve ECU 52 begins operation, control device 10 periodically sends operation signals to valve ECU 52 during the period when the system is switched on. Valve ECU 52 continues operation while periodically receiving operation signals from control device 10.

[0061] Even after the system is switched off, valve ECU 52 continues diagnostic control as long as the system is still in operation. Then, when the diagnostic control is complete, valve ECU 52 sends a completion notification to control device 10 indicating that the diagnostic control is complete.

[0062] Figure 4 This describes a series of processing steps performed by control device 10 to control the electronic control unit after the system is switched off. The processing circuit 11 of control device 10 executes... Figure 4 The process described is as follows. After the system is switched off, the processing circuit 11 executes the following actions on the hydraulic control ECU 51 and the valve ECU 52 respectively. Figure 4 The series of processes shown. In Figure 4 In this context, S represents a step.

[0063] Processing circuit 11 at the beginning Figure 4 In the series of processes shown, the process S11 is executed first. In the process S11, the processing circuit 11 determines whether the start-up constraint conditions are met.

[0064] In the process of S11, if the processing circuit 11 determines that the start-up restriction condition has not been met (S11: No), the process proceeds to S12. In the process of S12, the processing circuit 11 determines whether a completion notification has been received from the electronic control device. This is followed by execution of the hydraulic control ECU 51. Figure 4 In the series of processes shown, during process S12, the processing circuit 11 determines whether a completion notification has been received from the hydraulic control ECU 51. This is done before executing the valve ECU 52. Figure 4 In the series of processes shown, during the process of S12, the processing circuit 11 determines whether a completion notification has been received from the valve ECU 52.

[0065] In the process of S12, if the processing circuit 11 determines that it has not received a completion notification from the electronic control device (S12: No), the process proceeds to S13. In the process of S13, the processing circuit 11 determines that the operation of the electronic control device should continue. This is followed by execution of the hydraulic control ECU 51. Figure 4 In the series of processes shown, during process S13, processing circuit 11 determines that the operation of hydraulic control ECU 51 should continue. This is done while executing the valve ECU 52. Figure 4 In the series of processes shown, during the process of S13, the processing circuit 11 determines that the operation of the valve ECU52 should continue.

[0066] Next, processing circuit 11 executes process S14. In process S14, processing circuit 11 sends the operating signal of main relay 31 to the platform of main relay 31. By receiving the operating signal, the platform of main relay 31 keeps main relay 31 in the on state even after the system switch is turned off.

[0067] Next, processing circuit 11 executes process S15. In process S15, processing circuit 11 sends the operating signal of the electronic control unit. This is done when the hydraulic control ECU 51 is activated. Figure 4 In the series of processes shown, during process S15, processing circuit 11 sends an operating signal to hydraulic control ECU 51. This is followed by execution of a control signal by valve ECU 52. Figure 4 In the series of processes shown, during process S15, processing circuit 11 sends an operating signal to valve ECU 52. The electronic control unit that receives the operating signal continues to operate even after the system switch is turned off. After executing process S15, processing circuit 11 executes process S12 again.

[0068] In the process of S11, if the processing circuit 11 determines that the start-up constraint condition has been met (S11: Yes), it terminates. Figure 4 The series of processes shown. In the process of S12, the processing circuit 11 also ends when it determines that a completion notification has been received from the electronic control device (S12: Yes). Figure 4 The series of processes shown. If control device 10 ends. Figure 4 The series of processes shown will then stop sending the operating signal of the main relay 31 and the operating signal of the electronic control device.

[0069] <Methods for controlling cooling equipment after the system is switched off>

[0070] The control device 10 is communicatively connected to the radiator fan 42 and the water pump 43. The control device 10 controls the operation of the radiator fan 42 and the water pump 43.

[0071] As described above, the radiator fan 42 starts operating when the vehicle's system is switched on. After the radiator fan 42 starts operating, the control device 10 periodically sends an operating signal to the radiator fan 42 during the period when the system is switched on. The radiator fan 42 continues to operate while receiving operating signals periodically from the control device 10.

[0072] As described above, water pump 43 starts operating when the vehicle's system is switched on. After water pump 43 starts operating, control device 10 periodically sends operating signals to water pump 43 during the period when the system is switched on. Water pump 43 continues to operate while receiving operating signals periodically from control device 10.

[0073] Figure 5 This describes a series of processing steps performed by control device 10 to control the cooling equipment after the system is switched off. The processing circuit 11 of control device 10 executes... Figure 5 The process described is as follows. After the system is switched off, the processing circuit 11 performs the following actions on the radiator fan 42 and the water pump 43 respectively. Figure 5 The series of processes shown. In Figure 5 In this context, S represents a step.

[0074] Processing circuit 11 at the beginning Figure 5In the series of processes shown, the process S21 is executed first. In the process S21, the processing circuit 11 determines whether there is a request to operate the cooling device.

[0075] After the vehicle system is shut down and the engine 13 has just stopped, the temperature of the engine 13 may not drop. Therefore, in order to protect the engine 13 and its surrounding components, it is desirable for the cooling equipment to operate even after the system is switched off, while the engine 13 is at a high temperature. The processing circuit 11, for example, acquires the temperature of the engine 13 wall surface or the temperature of the coolant flowing in the cooling system 40, and determines that a cooling equipment operation request exists during a period when the acquired temperature is above a predetermined temperature. For example, the processing circuit 11 may determine that a cooling equipment operation request exists during a period before a predetermined time has elapsed after the system is switched off. In addition, the predetermined temperature and predetermined time may be the same or different for the radiator fan 42 and the water pump 43.

[0076] In the process of S21, if the processing circuit 11 determines that there is a request to operate the cooling equipment (S21: Yes), the process proceeds to S22. In the process of S22, the processing circuit 11 determines that the operation of the cooling equipment should continue. This is done while executing the operation on the radiator fan 42. Figure 5 In the series of processes shown, during process S22, processing circuit 11 determines to continue operating the radiator fan 42. This is followed by the execution of the water pump 43. Figure 5 In the series of processes shown, during the process of S22, the processing circuit 11 determines that the operation of the water pump 43 should continue.

[0077] Next, processing circuit 11 executes process S23. In process S23, processing circuit 11 sends the operating signal of main relay 31 to the platform of main relay 31. By receiving the operating signal, the platform of main relay 31 keeps main relay 31 in the on state even after the system switch is turned off.

[0078] Next, processing circuit 11 executes process S24. In process S24, processing circuit 11 sends an operation signal for the cooling device. This is done while the radiator fan 42 is being activated. Figure 5 In the series of processes shown, during process S24, processing circuit 11 sends an operation signal to radiator fan 42. This is followed by the execution of a signal by water pump 43. Figure 5 In the series of processes shown, during process S24, processing circuit 11 sends an operation signal to water pump 43. The cooling device, upon receiving the operation signal, continues to operate even after the system switch is turned off. After executing process S24, processing circuit 11 executes process S21 again.

[0079] In the process of S21, if the processing circuit 11 determines that there is no request to operate the cooling equipment (S21: No), it terminates the process. Figure 5 The series of processes shown. If control device 10 ends. Figure 5 The series of processes shown will then stop sending the operating signal of the main relay 31 and the operating signal of the cooling equipment.

[0080] <Changes in the status of each device after the system is switched off>

[0081] Figure 6 This indicates the state changes of each device after the vehicle's system switches are turned off.

[0082] Figure 6 (a) indicates the state change of the ignition switch. Figure 6 In (a), the ignition switch changes from on to off at time T1. As described above, if the ignition switch is off, the vehicle's system switches from on to off.

[0083] Figure 6 (b) indicates the state changes of the hydraulic control ECU 51. Figure 6 In (b), the portion indicated by the solid line represents the state changes of the hydraulic control ECU 51 when the start-up constraints are not met and the system is switched off. For example... Figure 4 As shown, if the start-up constraint is not met (S11: No), during the period when the learning control based on the hydraulic control ECU 51 is completed but no completion notification is received (S12: No), the control device 10 sends a run signal to the hydraulic control ECU 51 (S15). Then, if the control device 10 receives a completion notification from the hydraulic control ECU 51 (S12: Yes), it terminates the process. Figure 4 The process shown involves sending a series of signals to process and stop operation. In Figure 6 In the solid line portion of (b), after the learning control based on the hydraulic control ECU 51 is completed and the control device 10 receives the completion notification, the control device 10 stops sending the operation signal, thereby the hydraulic control ECU 51 stops running at time T3.

[0084] exist Figure 6 In (b), the dashed lines represent the state changes of the hydraulic control ECU 51 when the start-up constraints are met and the system is switched off. For example... Figure 4 As shown, when the start-up constraint condition is met (S11: Yes), the control device 10 terminates. Figure 4 The system processes and stops sending operation signals. That is, if the start-up constraints are met, the control device 10 stops the operation of the hydraulic control ECU 51 regardless of whether the learning control is complete. Figure 6 In the dashed section of (b), after time T1, the control device 10 immediately stops sending the operation signal, thereby the hydraulic control ECU 51 stops operating at time T2.

[0085] Figure 6 (c) indicates the state change of valve ECU52. Figure 6 In (c), the portion indicated by the solid line represents the state change of valve ECU52 when the start-up constraints are not met and the system is switched off. For example... Figure 4 As shown, if the start-up constraint condition is not met (S11: No), during the period when diagnostic control based on valve ECU 52 is completed but no completion notification is received (S12: No), control device 10 sends a run signal to valve ECU 52 (S15). Then, if control device 10 receives a completion notification from valve ECU 52 (S12: Yes), it terminates the process. Figure 4 The process shown involves sending a series of signals to process and stop operation. In Figure 6 In the solid line portion of (c), after the diagnostic control based on valve ECU52 is completed and the control device 10 receives the completion notification, the control device 10 stops sending the operation signal, thereby valve ECU52 stops operating at time T4.

[0086] exist Figure 6 In (c), the dashed lines represent the state changes of valve ECU52 when the start-up constraints are met and the system switch is closed. For example... Figure 4 As shown, when the start-up constraint condition is met (S11: Yes), the control device 10 terminates. Figure 4 The system demonstrates a series of processing steps and the transmission of stop signals. Specifically, control device 10 stops the operation of valve ECU 52 regardless of whether diagnostic control is complete, provided the start-up constraints are met. Figure 6 In the dashed section of (c), after time T1, the control device 10 immediately stops sending the operation signal, thereby the valve ECU 52 stops operating at time T2.

[0087] Thus, the timing at which the control device 10 stops the operation of the hydraulic control ECU 51 and the valve ECU 52 varies depending on whether the start-up constraints are met.

[0088] Figure 6 (d) indicates the state change of the radiator fan 42. For example... Figure 5 As shown, during the period when there is a request to operate the cooling equipment (S21: Yes), the control device 10 sends an operation signal for the radiator fan 42 (S24). Then, when the request to operate the cooling equipment disappears (S21: No), the control device 10 terminates the process. Figure 5The process involves sending a series of signals to process and stop operation. Thus, the radiator fan 42 and... Figure 4 The situation is different with the electronic control device shown; regardless of whether the start-up restrictions are met, operation continues via control device 10 during periods when an operation request exists. Figure 6 In (d), after the cooling equipment's operation request disappears, the control device 10 stops sending operation signals, thereby causing the radiator fan 42 to stop operating at time T5.

[0089] Figure 6 (e) indicates the state change of water pump 43. For example... Figure 5 As shown, during the period when there is a request to operate the cooling equipment (S21: Yes), the control device 10 sends an operation signal for the water pump 43 (S24). Then, when the request to operate the cooling equipment disappears (S21: No), the control device 10 terminates the operation. Figure 5 The series of processing and stopping signals shown are transmitted. Thus, water pump 43 and... Figure 4 The situation is different with the electronic control device shown; regardless of whether the start-up restrictions are met, operation continues via control device 10 during periods when an operation request exists. Figure 6 In (e), after the cooling equipment's operation request disappears, the control device 10 stops sending operation signals, thereby causing the water pump 43 to stop operating at time T5.

[0090] Figure 6 (f) indicates the state change of the main relay 31. Figure 6 In (b), the control device 10 has ended at time T3 if the start-up constraint condition is not met, and at time T2 if the start-up constraint condition is met. Figure 4 The series of processes shown stops sending the operating signal of the main relay 31. Figure 6 In (c), the control device 10 has ended at time T4 if the start-up constraint conditions are not met, and at time T2 if the start-up constraint conditions are met. Figure 4 The series of processes shown stops sending the operating signal of the main relay 31. Figure 6 (d) and Figure 6 In (e), at time T5, control device 10 has already terminated regardless of whether the start-up constraints are met. Figure 5 The series of processes shown stops sending the operating signal of the main relay 31. Thus, in Figure 6 By time T5, control device 10 has stopped sending operating signals to main relay 31. As described above, main relay 31 becomes closed when it does not receive operating signals from control device 10 for a certain period of time. Figure 6In (f), the main relay 31 is turned off at time T6. Thus, the control device 10 stops. Figure 6 After all the devices shown are in operation, the main relay 31 is changed from the open state to the closed state.

[0091] <The function of this implementation method>

[0092] After the start-up restrictions are met and the system switch is turned off, the control device 10 continues to maintain the main relay 31 connected until the cooling equipment's operation request disappears.

[0093] <Effects of this implementation method>

[0094] (1) When an abnormality occurs in the composition of the exhaust gas, the control device 10 can prompt the user to take corrective measures and suppress the failure of parts around the engine 13.

[0095] (2) The vehicle is equipped with an electronic control device that starts operating when the system switch is turned on and performs learning control to learn the state of the equipment in the vehicle during operation. The electronic control device is connected to the battery 30 via the main relay 31. When the start-up restriction conditions are not met and the system switch is turned off, the control device 10 performs the following processing: continues to operate the cooling equipment until the cooling equipment's operation request disappears; continues to operate the electronic control device until the learning control based on the electronic control device is completed; and disconnects the main relay 31 after stopping the operation of both the cooling equipment and the electronic control device. When the start-up restriction conditions are met and the system switch is turned off, the control device 10 performs the following processing: stops the operation of the electronic control device regardless of whether the learning control is completed; continues to operate the cooling equipment until the cooling equipment's operation request disappears; and disconnects the main relay 31 after stopping the operation of both the cooling equipment and the electronic control device.

[0096] To protect the components, it is desirable for the cooling equipment to continue operating even when the starting constraints are met. On the other hand, the learning control, even if not executed, will hardly cause a component failure immediately, and is a control that can be executed even after the engine 13 can be restarted.

[0097] When the start-up constraints are met, the control device 10 continues to operate the cooling equipment, but does not continue to operate the electronic control device that performs learning control. Therefore, the control device 10 can reduce the amount of control performed when the start-up constraints are met and after the system is switched off.

[0098] (3) The vehicle is equipped with an electronic control device that starts operating when the system is switched on and performs diagnostic control during operation by recording its own abnormalities through a self-diagnostic function. The electronic control device is connected to the battery 30 via the main relay 31. When the start-up restriction conditions are not met and the system is switched off, the control device 10 performs the following actions: continues the operation of the cooling equipment until the cooling equipment's operation request disappears; continues the operation of the electronic control device until the diagnostic control based on the electronic control device is completed; and disconnects the main relay 31 after stopping the operation of both the cooling equipment and the electronic control device. When the start-up restriction conditions are met and the system is switched off, the control device 10 performs the following actions: stops the operation of the electronic control device regardless of whether the diagnostic control is completed; continues the operation of the cooling equipment until the cooling equipment's operation request disappears; and disconnects the main relay 31 after stopping the operation of both the cooling equipment and the electronic control device.

[0099] To protect the components, it is desirable for the cooling system to continue operating even when the starting constraints are met. On the other hand, diagnostic control, even if not executed, is unlikely to immediately cause component failure, and is a control that can be executed even after the engine 13 can be restarted.

[0100] When the start-up limiting conditions are met, the control device 10 continues to operate the cooling equipment, but does not continue to operate the electronic control device that performs diagnostic control. Therefore, the control device 10 can reduce the amount of control performed when the start-up limiting conditions are met and after the system is switched off.

[0101] (4) The cooling device is a radiator fan 42. After the start-up restriction conditions are met, the control device 10 operates the radiator fan 42 during the period when there is an operation request, and disconnects the main relay 31 after the operation of the radiator fan 42 ends. Thus, when an abnormality occurs in the exhaust composition, the control device 10 can prompt the user to take corrective measures and suppress the failure of parts around the engine 13.

[0102] (5) The cooling device is a water pump 43 that circulates cooling water. After the start-up restrictions are met, the control device 10 starts the water pump 43 during the period when there is an operation request, and disconnects the main relay 31 after the operation of the water pump 43 ends. Thus, when an abnormality occurs in the exhaust composition, the control device 10 can prompt the user to take corrective measures and suppress the failure of parts around the engine 13.

[0103] <Example of Change>

[0104] The above-described embodiments can be implemented in the following ways. The above-described embodiments and the following modifications can be combined with each other to implement them without causing technical inconsistencies.

[0105] Even if the start-up constraints are met, the control device 10 can wait for the learning control to complete before stopping the operation of the electronic control device.

[0106] Even if the start-up restrictions are met, the control device 10 can wait for the diagnostic control to complete before stopping the operation of the electronic control device.

[0107] The cooling equipment controlled by the control device 10 is not limited to the radiator fan 42 and the water pump 43, as long as it is connected to the battery 30 via the main relay 31. For example, the cooling equipment can be an electric oil pump that circulates the engine oil of the engine 13.

[0108] The abnormality of the components contained in the exhaust gas sensed by the control device 10 is not limited to NO contained in the exhaust gas as described in the above embodiment. x Abnormal concentration. For example, if the amount of particulate matter contained in the exhaust gas exceeds a predetermined amount, the control device 10 can determine that an abnormality has occurred in the components contained in the exhaust gas.

[0109] • The execution of learning control is not limited to the hydraulic control ECU 51. For example, learning control can be performed by the heater ECU that controls the heater of the vehicle, and the control device 10 can perform learning control according to... Figure 4 The process shown is used to control the heater ECU.

[0110] • The execution of diagnostic control is not limited to valve ECU 52. For example, diagnostic control can be performed by the heater ECU that controls the heater of the vehicle, and the control device 10 can perform diagnostic control according to… Figure 4 The process shown is used to control the heater ECU.

[0111] Symbol Explanation

[0112] 10-Control device, 11-Processing circuit, 12-Storage device, 13-Engine, 14-Exhaust pipe, 15-Exhaust purification device, 16-First intake pipe, 17-Turbocharger, 18-Second intake pipe, 19-Throttle valve, 20-NOx sensor, 21-Intercooler, 30-Battery, 31-Main relay, 32-Power cable, 40-Cooling system, 41-Radiator, 42-Radiator fan, 43-Water pump, 50-Hydraulic sensor, 51-Hydraulic control ECU, 52-Valve ECU, 100-Internal combustion engine system.

Claims

1. A control device for controlling an engine in a vehicle having a main relay connected to a cooling system including a cooling device for cooling the engine and a battery, characterized in that, When an abnormality occurs in the components contained in the engine exhaust, a drivable distance is displayed, which is the distance from when the abnormality is determined to have occurred until a predetermined distance is reached. When the starting restriction condition is met by the driving distance becoming zero and the system switch is off, the following starting restriction control is performed: the operation of the cooling equipment continues until the operation request of the cooling equipment disappears; after the operation of the cooling equipment is stopped, the main relay is disconnected; even if the system switch is on, the main relay remains disconnected, thereby preventing the engine from starting.

2. The control device according to claim 1, characterized in that, The vehicle is equipped with an electronic control device that starts operating when the system is switched on, and performs learning control during operation to learn the state of the equipment in the vehicle. The electronic control device is connected to the battery via the main relay. If the startup restriction conditions are not met and the system is switched off, the following process is performed: Continue operating the cooling equipment until the operation request for the cooling equipment disappears; Continue operating the electronic control device until the learning control based on the electronic control device is completed; After stopping both the cooling equipment and the electronic control device, disconnect the main relay. If the startup restriction conditions are met and the system is switched off, the following process is performed: Regardless of whether the learning control is completed, the operation of the electronic control device shall be stopped; Continue operating the cooling equipment until the operation request for the cooling equipment disappears; After stopping the operation of both the cooling equipment and the electronic control device, disconnect the main relay.

3. The control device according to claim 1, characterized in that, The vehicle is equipped with an electronic control device that starts operating when the system is switched on, and performs diagnostic control during operation by recording its own anomalies through a self-diagnostic function. The electronic control device is connected to the battery via the main relay. If the startup restriction conditions are not met and the system is switched off, the following process is performed: Continue operating the cooling equipment until the operation request for the cooling equipment disappears; Continue operating the electronic control device until the diagnostic control based on the electronic control device is completed; After stopping both the cooling equipment and the electronic control device, disconnect the main relay. If the startup restriction conditions are met and the system is switched off, the following process is performed: Regardless of whether the diagnostic control is completed, the operation of the electronic control device shall be stopped; Continue operating the cooling equipment until the operation request for the cooling equipment disappears; After stopping the operation of both the cooling equipment and the electronic control device, disconnect the main relay.

4. The control device according to any one of claims 1 to 3, characterized in that, The cooling device is a radiator fan.

5. The control device according to any one of claims 1 to 3, characterized in that, The cooling device is a water pump that circulates cooling water.

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