Vehicle control device

Abstract

To suppress a water content in an engine while power is being supplied by a power supply device.SOLUTION: A vehicle includes an engine, an electric motor, a battery, a power supply device, and a control device. The battery allows power transfer between itself and the electric motor. The power supply device can supply power from the battery to the outside. The control device executes power supply processing for causing the power supply device to supply the power from the battery to the outside. The control device executes water content calculation processing for calculating a water content that is the amount of water staying in the engine, on the basis of an engine operational state. The control device executes power generation processing for operating the engine and causing the electric motor to generate power, on condition that the power supply processing is being executed, and that the water content is equal to or more than a prescribed amount. The control device executes air-fuel ratio adjustment processing for increasing an air-fuel ratio in the engine as compared to a case where the water content is less than the prescribed amount, on condition that the power generation processing is being executed.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vehicle control device. [Background technology]

[0002] The vehicle in Patent Document 1 includes an engine, an electric motor, a battery, a power supply device, and a control device. The engine and the electric motor are the driving sources of the vehicle. The battery is capable of supplying power to and receiving power from the electric motor. The power supply device is capable of supplying power from the battery to devices outside the vehicle. When there is a request for power supply to devices outside the vehicle, the control device supplies power from the battery to the devices outside the vehicle via the power supply device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-037219 Summary of the Invention [Problem to be solved by the invention]

[0004] In an engine like the one described in Patent Document 1, for example, the amount of water contained in the oil stored in the engine's oil pan may increase, or the amount of water present in the engine's exhaust passage may increase. The vehicle described in Patent Document 1 does not focus on the amount of water remaining in the engine as described above, and there is room for improvement in how the power supply device handles the supply of power. [Means for solving the problem]

[0005] A vehicle control device for solving the above problem is a control device that controls a vehicle that has an engine that functions as a drive source, an electric motor that functions as a drive source, a battery that can exchange power with the electric motor, and a power supply device that can supply power from the battery to the outside, and executes a power supply process that supplies power from the battery to the outside using the power supply device, a moisture content calculation process that calculates the moisture content, which is the amount of moisture that has accumulated in the engine, based on the operating state of the engine, a power generation process that operates the engine to generate power using the electric motor, on the condition that the power supply process is being executed and the moisture content is equal to or greater than a predetermined specified amount, and an air-fuel ratio adjustment process that, on the condition that the power generation process is being executed, increases the air-fuel ratio of the engine compared to when the moisture content is less than the specified amount.

[0006] According to the above configuration, the amount of moisture present in the cylinders is reduced by increasing the air-fuel ratio through the execution of the air-fuel ratio adjustment process. Meanwhile, when the engine is running, moisture remaining in the engine is, for example, discharged with the exhaust or evaporates. In this way, the amount of moisture already in the engine is reduced while preventing further increases in the amount of moisture remaining in the engine due to moisture present in the cylinders, thereby reducing the overall amount of moisture in the engine. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic configuration diagram of a vehicle. [Figure 2] FIG. 1 is a schematic configuration diagram of an engine. [Figure 3] 10 is a flowchart showing a water content suppression control. [Figure 4] FIG. 10 is an explanatory diagram of an output increasing process. DETAILED DESCRIPTION OF THE INVENTION

[0008] <Vehicle Overview> An embodiment of the present invention will now be described with reference to Figures 1 to 4. First, a schematic configuration of a vehicle 100 will be described.

[0009] 1, the vehicle 100 includes, as drive sources, an engine 10, a first electric motor 71, and a second electric motor 72. Therefore, the vehicle 100 is a so-called hybrid vehicle. An example of the engine 10 is an engine that uses hydrogen as fuel.

[0010] 2, the engine 10 includes a cylinder block 11, a crankcase 12, and an oil pan 13. The engine 10 also includes a plurality of pistons 16, a plurality of connecting rods 17, and a crankshaft 18.

[0011] The cylinder block 11 has four cylinders 11A as an internal space of the cylinder block 11. The cylinders 11A are spaces for burning a mixture of fuel and intake air. Pistons 16 are located inside the cylinders 11A. The pistons 16 are connected to a crankshaft 18 via connecting rods 17. The pistons 16 reciprocate inside the cylinders 11A as the mixture of fuel and intake air burns in the cylinders 11A. The reciprocating motion of the pistons 16 causes the crankshaft 18 to rotate. Note that FIG. 2 shows only one cylinder 11A as a representative.

[0012] The cylinder block 11 is provided with a water jacket 15A as an internal space of the cylinder block 11. The water jacket 15A is a space for circulating cooling water. The water jacket 15A surrounds the cylinder 11A. The wall surface of the cylinder 11A is cooled by heat exchange with the cooling water circulating through the water jacket 15A.

[0013] The crankcase 12 is connected to the lower end of the cylinder block 11. The crankcase 12 and the cylinder block 11 support a crankshaft 18 sandwiched between them. The oil pan 13 is connected to the lower end of the crankcase 12. The oil pan 13 is shaped like a generally rectangular box with a bottom. Therefore, the oil pan 13 has an oil space 13A as an internal space of the oil pan 13. The oil space 13A is a space for storing oil. The oil stored in the oil space 13A is supplied to each part of the engine 10 by an oil pump (not shown).

[0014] The engine 10 includes an intake passage 21, a throttle valve 22, a plurality of fuel injection valves 23, and a plurality of ignition devices 24. The intake passage 21 is connected to each cylinder 11A. The intake passage 21 introduces intake air from outside the engine 10 into each cylinder 11A. The throttle valve 22 is located midway along the intake passage 21. The throttle valve 22 adjusts the amount of intake air flowing through the intake passage 21.

[0015] The fuel injection valves 23 are located near the downstream end of the intake passage 21. The engine 10 is equipped with four fuel injection valves 23 corresponding to the four cylinders 11A. The fuel injection valves 23 inject fuel supplied from a fuel tank (not shown) into the intake passage 21. As a result, fuel from the fuel injection valves 23 is supplied to the cylinders 11A. The ignition devices 24 are located in the cylinders 11A. The engine 10 is equipped with four ignition devices 24 corresponding to the four cylinders 11A. The ignition devices 24 ignite the mixture of fuel and intake air by spark discharge.

[0016] The engine 10 includes an exhaust passage 26, a three-way catalyst 27, and a filter 28. The exhaust passage 26 is connected to each cylinder 11A. The exhaust passage 26 discharges exhaust gas from each cylinder 11A to the outside of the engine 10.

[0017] The three-way catalyst 27 is located midway through the exhaust passage 26. The three-way catalyst 27 purifies the exhaust gas flowing through the exhaust passage 26. The filter 28 is located downstream of the three-way catalyst 27 in the exhaust passage 26. The filter 28 collects particulate matter contained in the exhaust gas flowing through the exhaust passage 26.

[0018] As shown in FIG. 1, the vehicle 100 includes a first planetary gear mechanism 40, a ring gear shaft 45, a second planetary gear mechanism 50, a reduction mechanism 62, a differential mechanism 63, and a plurality of drive wheels 64. The first planetary gear mechanism 40 includes a sun gear 41, a ring gear 42, a plurality of pinion gears 43, and a carrier 44. The sun gear 41 is an external gear. The sun gear 41 is connected to the first electric motor 71. The ring gear 42 is an internal gear and is located coaxially with the sun gear 41. Each pinion gear 43 is located between the sun gear 41 and the ring gear 42. Each pinion gear 43 meshes with both the sun gear 41 and the ring gear 42. The carrier 44 supports the pinion gear 43. The pinion gear 43 is rotatable on its own axis and is capable of revolving by rotating together with the carrier 44. The carrier 44 is connected to the crankshaft 18.

[0019] The ring gear shaft 45 is connected to the ring gear 42. The ring gear shaft 45 is also connected to drive wheels 64 via a reduction mechanism 62 and a differential mechanism 63. The reduction mechanism 62 reduces the rotational speed of the ring gear shaft 45 and outputs it. The differential mechanism 63 allows a difference in rotational speed to occur between the left and right drive wheels 64.

[0020] The second planetary gear mechanism 50 includes a sun gear 51, a ring gear 52, a plurality of pinion gears 53, a carrier 54, and a case 55. The sun gear 51 is an external gear. The sun gear 51 is connected to the second electric motor 72. The ring gear 52 is an internal gear and is positioned coaxially with the sun gear 51. The ring gear 52 is connected to the ring gear shaft 45. Each pinion gear 53 is positioned between the sun gear 51 and the ring gear 52. Each pinion gear 53 meshes with both the sun gear 51 and the ring gear 52. The carrier 54 supports the pinion gear 53. The pinion gear 53 is rotatable. The carrier 54 is fixed to the case 55. Therefore, the pinion gear 53 is unable to revolve.

[0021] The vehicle 100 is equipped with a battery 75, a first inverter 76, and a second inverter 77. The battery 75 is a secondary battery. The first inverter 76 converts AC power to DC power between the first electric motor 71 and the battery 75. The first inverter 76 also adjusts the amount of power exchanged between the first electric motor 71 and the battery 75. The second inverter 77 converts AC power to DC power between the second electric motor 72 and the battery 75. The second inverter 77 adjusts the amount of power exchanged between the second electric motor 72 and the battery 75.

[0022] The vehicle 100 includes a power supply device 30. The power supply device 30 includes an inverter 31 and a connector 32. The connector 32 can be connected to an electrical device (not shown) outside the vehicle 100. The connector 32 is electrically connected to a battery 75 via the inverter 31. The inverter 31 converts AC power to DC power between the connector 32 and the battery 75. The inverter 31 also adjusts the amount of power supplied from the battery 75 to the connector 32. Therefore, the power supply device 30 can supply power from the battery 75 to an electrical device outside the vehicle 100. An example of an electrical device outside the vehicle 100 is a device installed in the home of the user of the vehicle 100.

[0023] 1, the vehicle 100 is equipped with an accelerator operation amount sensor 81, a vehicle speed sensor 82, a crank angle sensor 83, and a water temperature sensor 84. The vehicle 100 also is equipped with a current sensor 86, a voltage sensor 87, and a battery temperature sensor 88.

[0024] The accelerator operation amount sensor 81 detects the accelerator operation amount ACC, which is the amount of operation of the accelerator pedal operated by the driver. The vehicle speed sensor 82 detects the vehicle speed SP, which is the speed of the vehicle 100. The crank angle sensor 83 detects the crank angle SC, which is the rotational position of the crankshaft 18. The water temperature sensor 84 detects the water temperature TW, which is the temperature of the coolant flowing through the water jacket 15A. Specifically, the water temperature sensor 84 detects the temperature of the downstream end of the water jacket 15A as the water temperature TW. The current sensor 86 detects the current IB, which is the current input / output to / from the battery 75. The voltage sensor 87 detects the voltage VB, which is the voltage between the terminals of the battery 75. The battery temperature sensor 88 detects the battery temperature TB, which is the temperature of the battery 75.

[0025] The vehicle 100 is equipped with a control device 90. The control device 90 acquires signals indicating various values ​​from various sensors. The control device 90 calculates an engine rotation speed NE, which is the number of rotations per unit time of the crankshaft 18, based on the crank angle SC.

[0026] The control device 90 calculates the state of charge (SOC) of the battery 75 based on the current IB, the voltage VB, and the battery temperature TB at each predetermined control cycle. The state of charge (SOC) is the ratio of the remaining capacity of the battery 75 to the fully charged capacity of the battery 75.

[0027] The control device 90 calculates a vehicle required driving force, which is a required value of driving force necessary for the vehicle 100 to travel, based on the accelerator operation amount ACC and the vehicle speed SP. The control device 90 determines the torque distribution among the engine 10, the first electric motor 71, and the second electric motor 72, based on the vehicle required driving force. The control device 90 outputs a control signal to the engine 10 to control the opening of the throttle valve 22, the fuel injection amount from the fuel injection valve 23, the ignition timing of the ignition device 24, etc. The control device 90 also outputs a control signal to the first inverter 76, thereby controlling the first electric motor 71 via the first inverter 76. The control device 90 also outputs a control signal to the second inverter 77, thereby controlling the second electric motor 72 via the second inverter 77.

[0028] Furthermore, when the vehicle 100 is traveling, the control device 90 selects either the EV mode or the HV mode as the traveling mode of the vehicle 100. Here, the EV mode is a traveling mode in which the engine 10 is stopped and one or more electric motors selected from the first electric motor 71 and the second electric motor 72 are driven to travel the vehicle 100. Furthermore, the HV mode is a traveling mode in which the engine 10 is driven in addition to the first electric motor 71 and the second electric motor 72 to travel the vehicle 100.

[0029] The control device 90 selects the EV mode, for example, when the state of charge (SOC) of the battery 75 has a sufficient margin and the required vehicle driving force is small. Examples of when the required vehicle driving force is small include when the vehicle 100 starts moving and when the vehicle 100 is running under a light load with low acceleration. On the other hand, the control device 90 selects the HV mode, for example, when the state of charge (SOC) of the battery 75 does not have a sufficient margin.

[0030] When operating the engine 10, the control device 90 controls the engine 10 by referring to a predetermined control map. As shown in FIG. 4 , the control map includes an optimal fuel economy operation line LZ and multiple constant power lines LX. The optimal fuel economy operation line LZ defines the relationship between the engine speed NE and the torque generated by the engine 10 for efficiently operating the engine 10. Note that the generated torque here refers to the torque generated per combustion. The constant power line LX defines the relationship between the engine speed NE and the torque generated by the engine 10 for achieving the same engine output. For example, to achieve an output of the engine 10 corresponding to a constant power line LXA, which is one of the multiple constant power lines LX, the control device 90 identifies an intersection YA between the constant power line LXA and the optimal fuel economy operation line LZ. The control device 90 then sets the engine speed NE corresponding to the intersection YA as a target value for the engine speed NE. The control device 90 also sets the torque generated by the engine 10 corresponding to the intersection YA as a target value for the torque generated by the engine 10. Furthermore, the control device 90 controls the engine 10 based on a target value of the engine rotation speed NE and a target value of the torque generated by the engine 10 .

[0031] The control device 90 executes a water content calculation process at each predetermined control cycle. The water content calculation process calculates the water content AW, which is the amount of water contained in the oil stored in the oil pan 13, based on the operating state of the engine 10. In this embodiment, the control device 90 calculates the water content AW based on the injection amount from the fuel injection valve 23, the engine rotation speed NE, the water temperature TW, and other factors. For example, the control device 90 calculates a larger increase in the water content AW per unit time as the injection amount from the fuel injection valve 23 increases and the engine rotation speed NE increases. Furthermore, the control device 90 calculates a larger decrease in the water content AW per unit time as the water temperature TW increases. The control device 90 then calculates the final water content AW by subtracting the absolute value of the decrease in the water content AW per unit time from the absolute value of the increase in the water content AW per unit time and adding the result to the previously calculated water content AW. In this embodiment, the water content AW is an example of the amount of water remaining in the engine 10.

[0032] The control device 90 executes a power supply process in which the power supply device 30 supplies power from the battery 75 to the outside of the vehicle 100. Specifically, the control device 90 executes the power supply process when predetermined supply conditions are satisfied. One example of the power supply conditions is that the connector 32 is connected to an electrical device outside the vehicle 100 and that a power supply switch provided in the vehicle 100 is turned on.

[0033] The control device 90 may be configured as a circuit including one or more processors that execute various processes according to a computer program (software). The control device 90 may also be configured as a circuit including one or more dedicated hardware circuits, such as an application-specific integrated circuit (ASIC), that execute at least some of the various processes, or a combination thereof. The processor includes a CPU and memory such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to execute processes. The memory, i.e., computer-readable medium, includes any medium that can be accessed by a general-purpose or dedicated computer.

[0034] <Moisture content control> Next, the moisture content reduction control executed by the control device 90 will be described with reference to Fig. 3. In this embodiment, the control device 90 repeatedly executes the moisture content reduction control while the power supply process is being executed.

[0035] As shown in Fig. 3, when the control device 90 starts the water content suppression control, it executes the process of step S11. In step S11, the control device 90 determines whether the water content AW is less than a predetermined specified amount A. Here, the specified amount A is a threshold value for determining whether the water content AW is an amount that is allowable in terms of the design of the engine 10. The specified amount A can be determined, for example, through experiments, simulations, etc. In step S11, if the control device 90 determines that the water content AW is less than the specified amount A (S11: YES), the control device 90 proceeds to the process of step S12.

[0036] In step S12, the control device 90 determines whether the state of charge SOC is equal to or greater than a predetermined first specified value C1. Here, the first specified value C1 is a threshold value for determining whether there is a margin for supplying power from the battery 75 when supplying power from the battery 75 to electrical devices external to the vehicle 100. An example of the first specified value C1 is several tens of percent. In step S12, if the control device 90 determines that the state of charge SOC is equal to or greater than the first specified value C1 (S12: YES), the control device 90 proceeds to step S21.

[0037] In step S21, the control device 90 executes only the normal power supply process. Specifically, the control device 90 supplies electric power from the battery 75 to electrical devices external to the vehicle 100 without executing power generation by the first electric motor 71 using the output of the engine 10, which will be described later. Note that, if power generation by the first electric motor 71 is being executed before the start of the process of step S21, the control device 90 stops the operation of the engine 10 and also stops the execution of power generation by the first electric motor 71. After step S21, the control device 90 ends the current water content reduction control. Then, the control device 90 proceeds to step S11 again.

[0038] On the other hand, if the control device 90 determines in step S12 that the storage rate SOC is less than the first specified value C1 (S12: NO), the control device 90 proceeds to step S22.

[0039] In step S22, the control device 90 performs the normal power supply process and also generates power by the first electric motor 71 using the output of the engine 10. Specifically, the control device 90 operates the engine 10 by outputting a control signal to the engine 10. At this time, the control device 90 sets a target value of the engine speed NE of the engine 10 to a predetermined reference value. The control device 90 also sets a target value of the torque generated by the engine 10 to a predetermined reference value. The control device 90 then controls the engine 10 based on the target value of the engine speed NE and the target value of the torque generated by the engine 10. When operating the engine 10 in the process of step S22, the control device 90 sets the target air-fuel ratio of the engine 10 to the stoichiometric air-fuel ratio. Here, the air-fuel ratio of the engine 10 is the value obtained by dividing the mass of intake air supplied to the cylinder 11A by the mass of fuel supplied to the cylinder 11A. Therefore, the higher the air-fuel ratio of the engine 10, the greater the amount of intake air relative to fuel in the cylinder 11A. The control device 90 also outputs a control signal to the first electric motor 71, causing the first electric motor 71 to generate electricity using the output of the engine 10. The control device 90 then charges the battery 75 with the electricity generated by the first electric motor 71. After step S22, the control device 90 ends the current moisture content reduction control. The control device 90 then proceeds to step S11 again.

[0040] On the other hand, in the above-mentioned step S11, if the control device 90 determines that the moisture amount AW is equal to or greater than the specified amount A (S11: NO), the control device 90 proceeds to step S13. In other words, the control device 90 proceeds to step S13 on the condition that the power supply process is being executed and the moisture amount AW is equal to or greater than the specified amount A.

[0041] In step S13, the control device 90 determines whether the state of charge SOC is equal to or greater than a predetermined second specified value C2. Here, the second specified value C2 is a threshold value for determining whether there is a margin for charging power to the battery 75. An example of the second specified value C2 is several tens of percent. The second specified value C2 is a predetermined state of charge. In step S13, if the control device 90 determines that the state of charge SOC is equal to or greater than the second specified value C2 (S13: YES), the control device 90 proceeds to step S23.

[0042] In step S23, in addition to the normal power supply process, the control device 90 performs power generation by the first electric motor 71 using the output of the engine 10. Specifically, the control device 90 operates the engine 10 by outputting a control signal to the engine 10. At this time, the control device 90 sets a target value of the engine speed NE of the engine 10 to a predetermined reference value. The control device 90 also sets a target value of the torque generated by the engine 10 to a predetermined reference value. The control device 90 then controls the engine 10 based on the target value of the engine speed NE and the target value of the torque generated by the engine 10. When operating the engine 10 in the process of step S23, the control device 90 sets the output of the engine 10 to the same as the output when operating the engine 10 in the process of step S22. On the other hand, when operating the engine 10 in the process of step S23, the control device 90 sets a target air-fuel ratio of the engine 10 higher than the air-fuel ratio when operating the engine 10 in the process of step S22. Furthermore, the control device 90 outputs a control signal to the first electric motor 71, causing the first electric motor 71 to generate electricity using the output of the engine 10. Then, the control device 90 causes the battery 75 to be charged with the electric power generated by the first electric motor 71. In this embodiment, the process of step S23 is a power generation process. Furthermore, the process of step S23 is an air-fuel ratio adjustment process that increases the air-fuel ratio of the engine 10 compared to when the process of step S22 is executed, i.e., compared to when the water content AW is less than the specified amount A. After step S23, the control device 90 ends the current water content suppression control. Then, the control device 90 proceeds to step S11 again.

[0043] On the other hand, if the control device 90 determines in step S13 that the storage rate SOC is less than the second specified value C2 (S13: NO), the control device 90 proceeds to step S24.

[0044] In step S24, the control device 90 performs a normal power supply process and also causes the first electric motor 71 to generate electricity using the output of the engine 10. Specifically, the control device 90 operates the engine 10 by outputting a control signal to the engine 10. When operating the engine 10 in step S24, the control device 90 increases the output of the engine 10 compared to the output when operating the engine 10 in step S22. For example, as shown in FIG. 4, when operating the engine 10 in step S22, an intersection point YA on the optimal fuel economy operation line LZ is identified. In this case, as indicated by the solid arrow in FIG. 4, in step S24, the control device 90 identifies an output increase point YB on the optimal fuel economy operation line LZ so that the output increases beyond the intersection point YA. Then, the control device 90 sets a target value for the engine speed NE and a target value for the torque generated by the engine 10 based on the output increase point YB. The control device 90 also outputs a control signal to the first electric motor 71 to generate electricity using the output of the engine 10. The control device 90 then charges the battery 75 with the electric power generated by the first electric motor 71. In this embodiment, the process of step S24 is a power generation process. The process of step S24 is also an output increase process that increases the output of the engine 10 compared to when the process of step S22 is executed, i.e., compared to when the water content AW is less than the specified amount A. After step S24, the control device 90 ends the current water content reduction control. The control device 90 then proceeds to step S11 again.

[0045] <Operation of this embodiment> It is assumed that a power supply process is being executed in the vehicle 100. At this time, as shown in Fig. 3, in the water content suppression control, if the water content AW is equal to or greater than a specified amount A and the state of charge SOC is equal to or greater than a second specified value C2, the process of step S23 is executed. In this step S23, in addition to the normal power supply process, power generation by the first electric motor 71 is executed while the engine 10 is operating. Furthermore, in step S23, an air-fuel ratio adjustment process is executed to increase the air-fuel ratio of the engine 10 compared to when the process of step S22 is executed, i.e., compared to when the water content AW is less than the specified amount A.

[0046] <Effects of this embodiment> (1) In engine 10, the amount of moisture present in cylinder 11A decreases as the air-fuel ratio increases due to the execution of the air-fuel ratio adjustment process in step S23. Specifically, it is estimated that the amount of moisture present in cylinder 11A decreases based on the following principle. For example, if the amount of fuel in cylinder 11A is constant, the amount of air relative to the amount of fuel in cylinder 11A increases, thereby increasing the amount of gas flowing through cylinder 11A. As the amount of gas flowing through cylinder 11A increases, moisture is discharged along with the gas flowing from cylinder 11A to exhaust passage 26. Furthermore, for example, if the amount of air in cylinder 11A is constant, the amount of fuel relative to the amount of air in cylinder 11A decreases, thereby decreasing the amount of moisture produced by the combustion of fuel in cylinder 11A. As a result, if the amount of moisture present in cylinder 11A decreases as described above, the amount of condensed water generated in cylinder 11A per unit time is suppressed. This prevents condensed water generated in cylinder 11A from reaching the oil pan 13 and increasing the water content AW. Moreover, when engine 10 is operating, the water contained in the oil stored in oil pan 13 evaporates due to the heat of combustion of the air-fuel mixture in cylinder 11A, etc. Therefore, in engine 10, the water content AW already in engine 10 decreases while a new increase in the water content AW is prevented by suppressing the water content present in cylinder 11A. As a result, the water content AW of engine 10 as a whole can be reduced.

[0047] (2) In the water content suppression control, the engine 10 is operated and the first electric motor 71 generates electricity, provided that the water content AW is equal to or greater than the specified amount A. Furthermore, in step S24, an output increase process is executed to increase the output of the engine 10 compared to when the water content AW is less than the specified amount A. Therefore, the temperature of the cylinder 11A is more likely to rise due to the heat of combustion in the cylinder 11A. When the temperature of the cylinder 11A increases, water is less likely to condense in the cylinder 11A. This effectively suppresses the amount of condensed water generated in the cylinder 11A per unit time.

[0048] (3) In this embodiment, when the water amount AW is equal to or greater than the specified amount A and the state of charge SOC is less than the second specified value C2, the output increase process is executed in step S24. As a result, when the state of charge SOC is equal to or greater than the second specified value C2, i.e., when the state of charge SOC is relatively high, the output increase process is not executed. In other words, when the state of charge SOC is relatively high, an increase in the amount of power generated by the first electric motor 71 is suppressed. As a result, it is possible to suppress overcharging of the battery 75 due to the output increase process.

[0049] (4) In this embodiment, when the water content AW is equal to or greater than the specified amount A and the state of charge SOC is equal to or greater than the second specified value C2, the air-fuel ratio adjustment process is executed in step S23. In other words, the air-fuel ratio adjustment process is executed in a situation where the output increase process should not be executed. This makes it possible to reduce the water content AW of the engine 10 by executing the air-fuel ratio adjustment process while suppressing overcharging of the battery 75 caused by the output increase process in a situation where the output increase process should not be executed.

[0050] (5) In the water content calculation process, the control device 90 calculates the amount of water contained in the oil stored in the oil pan 13 as the water content AW. This allows the air-fuel ratio adjustment process of step S23 to be performed based on the amount of water in locations in the engine 10 where water is particularly likely to accumulate.

[0051] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0052] In the above embodiment, the moisture content calculation process may be changed. For example, in the water amount calculation process, the control device 90 may calculate the amount of water remaining in the exhaust passage 26 as the water amount AW, instead of the amount of water contained in the oil stored in the oil pan 13.

[0053] For example, in the water content calculation process, the control device 90 may calculate the sum of the amount of water contained in the oil stored in the oil pan 13 and the amount of water stagnating in the exhaust passage 26 as the water content AW.

[0054] In the above embodiment, the moisture content suppression control may be changed. For example, the process of step S23 may be changed. As a specific example, in step S23, the control device 90 may further execute an output increase process that increases the output of the engine 10 compared to when the process of step S22 is executed, i.e., compared to when the water amount AW is less than the specified amount A.

[0055] For example, the process of step S24 may be changed. As a specific example, in step S24, the control device 90 may further execute an air-fuel ratio adjustment process to increase the air-fuel ratio of the engine 10 compared to when the process of step S22 is executed, i.e., compared to when the water amount AW is less than the specified amount A.

[0056] For example, the determination process of step S13 may be omitted. As a specific example, if a negative determination is made in step S11, the control device 90 may execute the process of step S23. For example, the determination process of step S12 may be omitted. As a specific example, if the determination in step S11 is affirmative, the control device 90 may execute a predetermined one of the processes of step S21 and step S22.

[0057] In the above embodiment, the configuration of the vehicle 100 may be changed. For example, if the vehicle 100 is equipped with one or more electric motors as a drive source, the number of electric motors may be changed. [Explanation of symbols]

[0058] 10...engine, 30...power supply device, 31...inverter, 32...connector, 40...first planetary gear mechanism, 50...second planetary gear mechanism, 62...reduction mechanism, 63...differential mechanism, 64...drive wheels, 71...first electric motor, 72...second electric motor, 75...battery, 76...first inverter, 77...second inverter, 81...accelerator operation amount sensor, 82...vehicle speed sensor, 83...crank angle sensor, 84...water temperature sensor, 86...current sensor, 87...voltage sensor, 88...battery temperature sensor, 90...control device, 100...vehicle.

Claims

1. an engine that functions as a driving source; an electric motor that functions as a drive source; a battery capable of supplying and receiving power to and from the electric motor; a power supply device capable of supplying power from the battery to an external device; A control device for controlling a vehicle equipped with a power supply process in which the power supply device supplies power from the battery to an external device; a moisture amount calculation process for calculating a moisture amount, which is the amount of moisture remaining in the engine, based on an operating state of the engine; a power generation process of operating the engine to generate electric power by the electric motor, under the condition that the power supply process is being executed and the amount of moisture is equal to or greater than a predetermined specified amount; and executing an air-fuel ratio adjustment process to increase the air-fuel ratio of the engine compared to when the amount of water is less than the specified amount, on the condition that the power generation process is being performed. Vehicle control device.

2. In the water content calculation process, the amount of water contained in the oil stored in the oil pan of the engine is calculated as the water content. The vehicle control device according to claim 1 .

3. On the condition that the power generation process is being performed, an output increase process is performed to increase the output of the engine compared to when the amount of water is less than the specified amount. The vehicle control device according to claim 1 or 2.

4. The output increasing process is executed when, in addition to the condition that the power generation process is being executed, a condition that the charging rate of the battery is less than a predetermined charging rate is satisfied. The vehicle control device according to claim 3.

5. The air-fuel ratio adjustment process is executed when the condition that the power generation process is being executed and the charging rate of the battery is equal to or higher than the predetermined charging rate are satisfied. The vehicle control device according to claim 4.

Images