JP6358501B2 - Hybrid car - Google Patents

Description

  The present invention relates to a hybrid vehicle that includes an engine and an electric motor, and the engine and the electric motor travel in cooperation.

A hybrid vehicle that includes an engine and an electric motor and in which the engine and the electric motor run in cooperation with each other is widely known. Such a hybrid vehicle has a heater core that heats air blown into the passenger compartment, a cooling water passage that supplies cooling water heated by exhaust heat of the engine to the heater core, and the temperature of the cooling water that flows through the cooling water passage is a predetermined temperature. And an electric hot water heater (heating means) that heats the cooling water flowing in the cooling water flow path when it is less than. Thus, while the engine is operating, the cooling water heated by the exhaust heat of the engine is supplied to heat the air blown into the passenger compartment, while the temperature of the cooling water flowing through the cooling water flow path is less than the predetermined temperature. In such a case, the cooling water flowing in the cooling water flow path is heated with an electric hot water heater, and the air blown into the passenger compartment is heated (see, for example, Patent Document 1).
By the way, in the hybrid vehicle described above, when the outside air temperature is low and the engine is extremely cooled, the engine may not be started. In such a case, the vehicle travels only with the electric motor, and the hybrid traveling in which the engine and the electric motor cooperate with each other cannot be performed.
In order to solve such a problem, a hybrid vehicle in which a block heater is attached to an engine has been proposed. The block heater generates heat by electric power supplied from an external power source and warms up the engine, and includes a temperature sensor that detects the temperature of cooling water that cools the engine. The block heater sets the cooling water temperature necessary to ensure engine startability as a set value (target temperature), and warms up the engine so that the cooling water temperature detected by the temperature sensor becomes the set value. (For example, refer to Patent Document 2).

Japanese Patent No. 5076990 JP 2013-86670 A

However, when the block heater described in Patent Document 2 described above is applied to the hybrid vehicle described in Patent Document 1 described above, a block heater is required in addition to the electric hot water heater, which is not efficient.
In view of the above circumstances, an object of the present invention is to provide a hybrid vehicle capable of warming up an engine using cooling water heated by a heating unit.

  The present invention is a hybrid vehicle including an engine and an electric motor, wherein the engine and the electric motor travel in cooperation with each other, and air blown into the vehicle interior when heating of the vehicle interior is requested. A heater core for heating, a cooling water passage for circulating cooling water of the engine between the heater core and the engine, and heating means provided in the cooling water passage for heating the cooling water; A bypass flow path that branches from the cooling water flow path and bypasses the engine and circulates the cooling water, and selects either the cooling water flow path or the bypass flow path as a flow path that circulates the cooling water. A flow path switching valve that determines whether or not the engine needs to be warmed up, and when warming up the engine, the heating means heats the cooling water, And a controller for selecting the Kiryuro the cooling water flow path switching valve, and further comprising a.

  In the present invention, the controller determines whether or not the engine needs to be warmed up. When the engine is warmed up, the heating means heats the cooling water and the flow path switching valve selects the cooling water flow path. Thereby, the cooling water heated by the heating means passes through the cooling water flow path and circulates through the engine, so that the engine is warmed up by the cooling water heated by the heating means. Therefore, according to the present invention, the engine can be warmed up using the cooling water heated by the heating means.

In one aspect of the present invention, an input means for inputting a scheduled travel start time, and a setting unit for setting whether to start heating the passenger compartment at a scheduled heating start time before the scheduled travel start time are further provided. The controller determines whether or not the engine needs to be warmed up at a time earlier than the scheduled heating start time when the passenger compartment is heated before the scheduled travel start time.
In this case, since the controller determines whether or not the engine needs to be warmed up when the vehicle interior is heated before the scheduled start time of travel, when the vehicle interior is heated before the scheduled start time of travel. You can also warm up the engine.

In one aspect of the present invention, the controller controls the difference between the temperature of the engine and the target temperature, and the temperature of the vehicle interior and the target temperature when the vehicle interior is heated before the scheduled start time of travel. Based on the difference, the flow path switching valve is caused to select a flow path.
In this way, the controller causes the switching valve to select the flow path based on the difference between the engine temperature and the target temperature, and the difference between the vehicle interior temperature and the target temperature. And heating the passenger compartment in a well-balanced manner.

In one aspect of the present invention, the controller causes the flow path switching valve to flow the cooling water flow when the difference between the engine temperature and the target temperature is larger than the difference between the vehicle interior temperature and the target temperature. When the path is selected, the bypass channel is selected.
In this way, the controller causes the flow path switching valve to select the cooling water flow path when the difference between the engine temperature and the target temperature is larger than the difference between the vehicle interior temperature and the target temperature, and the small In some cases, the bypass flow path is selected. That is, when the difference between the engine temperature and the target temperature is larger than the difference between the vehicle interior temperature and the target temperature, the engine is warmed up and the vehicle interior is heated, and when it is smaller, the vehicle interior is heated. The Thereby, engine warm-up and vehicle interior heating can be executed in a well-balanced manner.

  As described above, according to the present invention, the engine can be warmed up using the cooling water heated by the heating means.

1 is a schematic diagram showing a configuration of a hybrid vehicle according to an embodiment of the present invention. It is a block diagram which shows the control structure of the hybrid vehicle shown in FIG. FIG. 2 is a time chart showing an example of engine warm-up control and vehicle interior heating control before the hybrid vehicle shown in FIG. FIG. 4 is a flowchart showing an example of control contents for realizing engine warm-up control and vehicle interior heating control shown in FIG. 3. FIG. It is a flowchart which shows an example of the content of the control which implement | achieves the heating control of the engine shown in FIG. 3, and the heating control of a vehicle interior. It is a flowchart which shows an example of flow-path switching valve control.

  Exemplary embodiments of a hybrid vehicle according to an embodiment of the present invention will be described below in detail with reference to the accompanying drawings. Here, a plug-in hybrid vehicle (PHEV) capable of charging a driving battery with an external power source will be described as an example, but the present invention is not limited to this embodiment.

FIG. 1 is a schematic diagram showing a configuration of a hybrid vehicle according to an embodiment of the present invention.
As shown in FIG. 1, a hybrid vehicle 1 according to an embodiment of the present invention is a plug-in hybrid vehicle (PHEV) that can charge a drive battery 11 with an external power source (not shown), and is water-cooled. In addition to the engine 2 and electric motor (not shown), a driving battery 11 and an in-vehicle charger 12 are provided. As a result, the plug 121 connected to the in-vehicle charger 12 is connected to the external power source. When power is supplied from the external power source to the in-vehicle charger 12, the driving battery 11 is charged with power.

  Moreover, the hybrid vehicle 1 according to the embodiment of the present invention uses the cooling water heated by the exhaust heat of the engine 2 for heating the vehicle interior, and the cooling water heated by the exhaust heat of the engine 2 circulates. The first cooling water channel 3 and the second cooling water channel 4 are provided.

  The first cooling water flow path 3 includes a radiator 31. The radiator 31 is for cooling the cooling water heated by the exhaust heat of the engine 2, and the outside air around the radiator 31 when the cooling water heated by the exhaust heat of the engine 2 passes through the inside of the radiator 31. Heat is exchanged between Thereby, the cooling water heated by the exhaust heat of the engine 2 is cooled when passing through the radiator 31.

  A radiator fan 311 is provided on the rear side of the radiator 31 in the vehicle front-rear direction. The radiator fan 311 is for increasing the heat exchange efficiency of the radiator 31. The air around the radiator 31 is forcibly replaced to increase the heat exchange efficiency of the radiator 31. Specifically, when the temperature of the cooling water flowing through the radiator 31 becomes equal to or higher than a predetermined temperature, the radiator fan 311 is operated, and the air around the radiator 31 is forcibly replaced so that the heat exchange efficiency of the radiator 31 is increased. Is increasing.

  The first cooling water flow path 3 includes a main flow path 32 through which cooling water flows through the radiator 31 and a radiator-side bypass flow path 33 through which cooling water bypasses the radiator 31. The radiator side bypass flow path 33 is a flow path that branches from the main flow path 32 upstream of the radiator 31 and merges with the main flow path 32 downstream of the radiator 31, and is a merge where the main flow path 32 and the radiator side bypass flow path 33 merge. A thermostat 34 is provided at the point. The thermostat 34 is a valve that is opened and closed depending on the temperature of the cooling water. When the valve (not shown) is closed, the main flow path 32 is closed, the radiator-side bypass flow path 33 is opened, and the valve is opened. The main flow path 32 is opened, and the radiator side bypass flow path 33 is closed. Therefore, the valve is closed until the temperature of the cooling water reaches a predetermined temperature, and the cooling water flows through the radiator-side bypass flow path 33. Accordingly, the cooling water does not flow through the radiator 31 until the temperature of the cooling water reaches a predetermined temperature, and the engine 2 is warmed up. On the other hand, when the temperature of the cooling water exceeds a predetermined temperature, the valve is opened, and the cooling water flows through the main flow path 32. Thereby, when the temperature of the cooling water exceeds a predetermined temperature, the cooling water flows through the radiator 31, and the cooling water is cooled by the radiator 31.

  The second cooling water flow path 4 includes a heater core 41. The heater core 41 is for warming the air in the passenger compartment, and heat is exchanged with the air around the heater core 41 when the heated cooling water passes through the heater core 41. Thereby, the air around the heater core 41 is heated.

  A blower fan 411 is provided on the front side of the heater core 41 in the vehicle front-rear direction. The blower fan 411 is for blowing out the air heated by the heater core 41 into the vehicle interior, and the air around the heater core 41 is forcibly blown out into the vehicle interior, so that the air in the vehicle interior is warmed.

  Further, the second cooling water flow path 4 according to the embodiment of the present invention includes an electric hot water heater 42 (heating means) upstream of the heater core 41. The electric hot water heater 42 is for heating the cooling water flowing through the second cooling water passage 4 when the cooling water is not heated by the exhaust heat of the engine 2 such as when the engine 2 is stopped. The electric power required for heating is supplied from the on-vehicle charger 12 connected to the driving battery 11 or an external power source. In the embodiment of the present invention, the electric hot water heater 42 is used as the heating means. However, the present invention is not limited to this, and any means may be used as long as it is different from the engine, such as a heat pump.

  The second cooling water flow path 4 according to the embodiment of the present invention includes a water pump 43 upstream of the electric hot water heater 42. The water pump 43 is for sending cooling water, and the sent cooling water passes through the electric hot water heater 42 and the heater core 41 and circulates in the second cooling water flow path 4.

  The second cooling water flow path 4 according to the embodiment of the present invention includes a main flow path 44 through which cooling water flows through the engine 2 and a bypass flow path 45 through which cooling water bypasses the engine 2. The bypass flow path 45 is a flow path that branches from the main flow path 44 downstream of the heater core 41 and merges with the main flow path 44 upstream of the water pump 43, and a flow path to a branch point where the bypass flow path 45 branches from the main flow path 44. A switching valve 46 is provided. The flow path switching valve 46 is for selecting a flow path through which the cooling water flows. When the main flow path 44 is selected, the bypass flow path 45 is closed and the cooling water circulates through the main flow path 44 while bypassing. When the channel 45 is selected, the main channel 44 is closed, and the cooling water circulates in the bypass channel 45. Therefore, when the main flow path 44 is selected, the cooling water sent out by the water pump 43 circulates through the main flow path 44 and is supplied to the engine 2 through the electric hot water heater 42 and the heater core 41. On the other hand, when the bypass channel 45 is selected, the cooling water sent out by the water pump 43 circulates in the bypass channel 45, passes through the electric hot water heater 42 and the heater core 41, and bypasses the engine 2. .

  Therefore, the main flow path 44 is selected when the cooling water heated by the exhaust heat of the engine 2 is used for heating the passenger compartment. Then, the cooling water heated by the exhaust heat of the engine 2 is sent out by the water pump 43, passes through the electric hot water heater 42, and is supplied to the heater core 41. The cooling water supplied to the heater core 41 exchanges heat with the air around the heater core 41 when passing through the inside of the heater core 41. Thereby, the air blown into the passenger compartment is heated.

  Further, when the cooling water heated by the electric hot water heater 42 is used for heating the passenger compartment, the bypass passage 45 is selected. Then, the cooling water sent out by the water pump 43 is heated by the electric hot water heater 42 and supplied to the heater core 41. The cooling water supplied to the heater core 41 exchanges heat with the air around the heater core 41 when passing through the inside of the heater core 41. Thereby, the air blown into the passenger compartment is heated.

  Further, when the cooling water heated by the electric hot water heater 42 is used for warming up the engine 2, the main flow path 44 is selected. Then, the cooling water sent out by the water pump 43 and heated by the electric hot water heater 42 passes through the heater core 41 and is supplied to the engine 2. Thereby, the cooling water supplied to the engine 2 warms up the engine 2.

FIG. 2 is a block diagram showing a control configuration of the hybrid vehicle shown in FIG.
As shown in FIG. 2, the water pump 43, the electric hot water heater 42, the flow path switching valve 46, and the blower fan 411 described above are comprehensively controlled by the controller 5. An input unit 61 (input means) and a setting unit 62 are connected to the controller 5. The input unit 61 is for the user to input the next scheduled vehicle use time (scheduled start time) after stopping the hybrid vehicle. The setting unit 62 is for the user to set whether or not to perform pre-air conditioning for adjusting the air in the passenger compartment in advance before the scheduled start time of travel. When the user inputs the next scheduled travel start time and sets the pre-air conditioning to be performed, the pre-air conditioning control unit calculates the pre-air conditioning time until the temperature in the vehicle interior reaches the target set temperature, The scheduled heating start time (pre-air conditioning start time T1) that is earlier by the air conditioning time is determined. The pre-air conditioning time is determined based on a detection value of a temperature sensor provided in the passenger compartment.

  The controller 5 includes a determination unit 51 and a selection unit 52. When the vehicle interior is heated before the start of traveling, the determination unit 51 warms up the engine 2 at a time T2 that is at least earlier than the scheduled heating start time (pre-air conditioning start time T1) by the time required to warm up the engine 2. It is determined whether or not it is necessary. The selection unit 52 selects a flow path through which the cooling water flows, and selects the main flow path 44 when it is determined that the engine 2 needs to be warmed up, and is determined not to require the engine 2 to be warmed up. The bypass channel 45 is selected. As a result, the hybrid vehicle 1 can warm up the engine 2 and heat the passenger compartment before starting to travel.

  FIG. 3 is a time chart showing an example of engine warm-up control and heating control before the start of traveling of the hybrid vehicle shown in FIG. FIG. 4 is a flowchart showing an example of the contents of control for realizing the engine heating control and the vehicle interior heating control shown in FIG. 3. In this example, as shown in FIG. 2, it is assumed that the heating of the passenger compartment (hereinafter referred to as “pre-air conditioning”) is set before the start of traveling.

  As shown in FIG. 3, in the hybrid vehicle 1 described above, when pre-air conditioning is set, as shown in FIG. 4, at least the engine 2 from the pre-air conditioning start time T1 (for example, 10 minutes before the start of traveling). When the time T2 earlier by the time required for warming up is reached (step S1: Yes), it is determined whether or not the engine 2 needs to be warmed up (step S2). Here, whether or not the engine 2 needs to be warmed is determined by the temperature of the engine 2 (cooling water) or the like. For example, when the temperature of the engine 2 is equal to or lower than a predetermined temperature at which the engine 2 cannot be started, the engine 2 It is determined that 2 warm-up is necessary. Further, the time required for warming up the engine 2 is also calculated from the temperature of the engine 2 (cooling water) and the like.

  If it is determined that the engine 2 needs to be warmed up (step S2: Yes), the pre-air conditioning is activated (step S3). Specifically, the electric hot water heater 42, the water pump 43, and the blower fan 411 are operated. Thereby, the cooling water heated by the electric hot water heater 42 is supplied to the heater core 41. And the cooling water supplied to the heater core 41 is heat-exchanged with the air around the heater core 41, and the air around the heater core 41 is heated. Then, the heated air is blown into the vehicle interior, and the air in the vehicle interior is warmed (heating).

  At this time, the flow path switching valve 46 is controlled (step S4). Specifically, the flow path through which the cooling water flows is set as the main flow path 44. Accordingly, the cooling water heated by the electric hot water heater 42 flows through the main flow path 44 and is supplied to the engine 2. Then, the engine 2 is warmed up.

  When the pre-air conditioning end time T0 is reached (step S5: Yes), the pre-air conditioning is stopped (step S6). Thereby, warm-up of the engine 2 is also complete | finished.

  On the other hand, if it is determined that the engine 2 does not need to be warmed up (step S2: No), it waits until the pre-air conditioning start time T1. When the pre-air conditioning start time T1 is reached (step S21), the pre-air conditioning is activated (step S22). Specifically, the electric hot water heater 42, the water pump 43, and the blower fan 411 are operated. Thereby, the cooling water flowing through the electric hot water heater 42 is heated and supplied to the heater core 41. And the cooling water supplied to the heater core 41 is heat-exchanged with the air around the heater core 41, and the air around the heater core 41 is heated. Then, the heated air is blown into the vehicle interior, and the air in the vehicle interior is warmed (heating).

  At this time, the flow path switching valve 46 is controlled (step S23). Specifically, the flow path through which the cooling water flows is set as the bypass flow path 45. As a result, the cooling water heated by the electric hot water heater 42 flows through the bypass passage 45 and the engine 2 is bypassed.

In addition, when it is before the time T2 which determines whether the engine 2 needs to be warmed up (step S2: No), or when it is before the pre air conditioning start time T1 (step S21: No). The pre-air conditioning is stopped (step S211).
By controlling as shown in FIG. 3, when engine warm-up is necessary, pre-air conditioning and engine warm-up can be executed at the same time from time T2, so even if the user gets into the vehicle earlier than the scheduled start time of travel, for example. A certain comfortable cabin temperature can be provided.

  FIG. 5 is a flowchart showing an example of the contents of control for realizing engine warm-up control and vehicle compartment heating control shown in FIG.

  As shown in FIG. 3, in the hybrid vehicle 1 described above, when pre-air conditioning is set, as shown in FIG. 5, at least the time necessary for warming up the engine 2 than the pre-air conditioning start time T <b> 1. When it is early time T2 (step S11), it is determined whether or not the engine needs to be warmed up (step S12).

  When it is determined that the engine 2 needs to be warmed up (step S12: Yes), the flow path switching valve 46 is controlled (step S13). Specifically, the flow path through which the cooling water flows is set as the main flow path 44. Thereby, the cooling water sent out by the water pump 43 flows through the main flow path 44 and is supplied to the engine 2.

  Further, the electric hot water heater 42 and the water pump 43 are operated (step S141) until the pre-air-conditioning start time T1 is reached after the flow path of the cooling water is set to the main flow path 44 (step S14). Accordingly, the cooling water heated by the electric hot water heater 42 flows through the main flow path 44 and is supplied to the engine 2. Then, the engine 2 is warmed up.

  Then, when the pre-air conditioning start time T1 is reached after the flow path for the cooling water is set to the main flow path 44 (step S14: Yes), the pre-air conditioning is activated (step S15). Specifically, in addition to the electric hot water heater 42 and the water pump 43, the blower fan 411 is operated. Thereby, the cooling water heated by the electric hot water heater 42 is supplied to the heater core 41. And the cooling water supplied to the heater core 41 is heat-exchanged with the air around the heater core 41, and the air around the heater core 41 is heated. Then, the heated air is blown into the vehicle interior, and the air in the vehicle interior is warmed (heating).

  When the pre-air conditioning end time T0 is reached (step S16: Yes), the pre-air conditioning is stopped (step S17). Thereby, the warm-up of the engine 2 and the heating of the passenger compartment are completed.

  On the other hand, when it is determined that the engine 2 does not need to be warmed up (step S12: No), the flow path switching valve 46 is controlled (step S121). Specifically, the flow path through which the cooling water flows is set as the bypass flow path 45. As a result, the cooling water delivered by the water pump 43 flows through the bypass passage 45 and the engine 2 is bypassed.

  Then, when the pre-air conditioning start time T1 is reached after the flow path for the cooling water is set to the bypass flow path 45 (step S122: Yes), the pre-air conditioning is activated (step S123). Specifically, the electric hot water heater 42, the water pump 43, and the blower fan 411 are operated. Thereby, the cooling water flowing through the electric hot water heater 42 is heated and supplied to the heater core 41. And the cooling water supplied to the heater core 41 is heat-exchanged with the air around the heater core 41, and the air around the heater core 41 is heated. Then, the heated air is blown into the vehicle interior, and the air in the vehicle interior is warmed (heating).

  When the pre-air conditioning end time T0 is reached (step S16: Yes), the pre-air conditioning is stopped (step S17). Thereby, the warm-up of the engine and the heating of the passenger compartment are completed.

In addition, when it is before the time T2 which determines whether the engine 2 needs to be warmed up (step S12: No), or when it is before the pre air conditioning start time T1 (step S122: No). In step S1211, the pre-air conditioning is stopped.
By controlling as shown in FIG. 5, when engine warm-up is necessary, the operation of the blower fan 411 is stopped from time T2 to time T1, so compared with the case of controlling as shown in FIG. Thus, power consumption can be reduced.

  In the hybrid vehicle 1 according to the embodiment of the present invention described above, the cooling water in which the controller 5 circulates through the second cooling water flow path 4 to the electric hot water heater 42 when pre-air-conditioning and warming up the engine 2 before traveling. And the main channel 44 is selected by the channel switching valve 46. Accordingly, the cooling water heated by the electric hot water heater 42 passes through the main flow path 44 and circulates in the engine 2, so that the engine 2 is warmed up by the cooling water heated by the electric hot water heater 42. Therefore, the hybrid vehicle 1 according to the embodiment of the present invention can warm up the engine 2 with the cooling water heated by the electric hot water heater 42.

  Since it is determined whether or not the engine 2 needs to be warmed up at a time T2 that is at least earlier than the pre-air conditioning start time T1 by the time necessary for warming up the engine 2, the warming up of the engine 2 and the pre-air conditioning must be compatible. Can do. The time for determining whether the engine 2 needs to be warmed up can be arbitrarily set.

FIG. 6 is a flowchart illustrating an example of flow path switching valve control.
As a modification of the flow path switching valve control shown in step S4 of FIG. 3, as shown in FIG. 6, in the hybrid vehicle 1 described above, the controller 5 determines the difference between the temperature (water temperature) of the engine 2 and its target temperature. The flow path switching valve 46 may select a flow path based on the difference between the temperature in the passenger compartment and the target temperature.

  Specifically, as shown in FIG. 6, the controller 5 determines that the difference between the temperature (water temperature) of the engine 2 and the target temperature is larger than the difference between the temperature in the passenger compartment and the target temperature (step S41: If YES, the flow path switching valve 46 is made to select the main flow path 44 (step S42), and if smaller (step S41: NO), the bypass flow path 45 is selected (step S43). In this way, when the difference between the temperature of the engine 2 and its target temperature is large, the engine 2 is warmed up and the vehicle interior is heated when the difference between the temperature of the vehicle interior and the target temperature is large, and when the difference is small. The passenger compartment is heated. Thereby, warming up of the engine 2 and heating (pre-air conditioning) of the passenger compartment can be executed in a well-balanced manner.

  As described above, according to the present invention, the engine can be warmed up using the cooling water heated by the electric hot water heater. It is suitable for a hybrid vehicle, and particularly suitable for a plug-in hybrid vehicle (PHEV) in which a driving battery can be charged by an external power source.

DESCRIPTION OF SYMBOLS 1 Electric vehicle 11 Driving battery 12 Car charger 121 Plug 2 Engine 3 1st cooling water flow path 31 Radiator 311 Radiator fan 32 Main flow path 33 Radiator side bypass flow path 34 Thermostat 4 2nd cooling water flow path 41 Heater core 411 Blower fan 42 Electricity Hot water heater (heating means)
43 Water pump 44 Main flow path 45 Bypass flow path 46 Flow path switching valve 5 Controller 51 Determination section 52 Selection section 61 Input section (input means)
62 Setting section

Claims (3)

A hybrid vehicle comprising an engine and an electric motor, wherein the engine and the electric motor travel in cooperation with each other,
A heater core that heats the air blown into the passenger compartment when heating in the passenger compartment is requested;
A cooling water flow path through which the cooling water of the engine circulates between the heater core and the engine;
A heating means provided in the cooling water flow path, for heating the cooling water, different from the engine;
A bypass passage that branches off from the cooling water passage, bypasses the engine, and circulates the cooling water;
A flow path switching valve that selects either the cooling water flow path or the bypass flow path as a flow path through which the cooling water circulates;
An input means for inputting the scheduled driving start time;
A setting unit for setting whether or not to start heating in the passenger compartment at a scheduled heating start time before the scheduled travel start time;
When heating the vehicle interior before the scheduled start time of traveling, it is determined whether the engine needs to be warmed up earlier than the scheduled heating start time, and when warming up the engine, A controller that causes the heating means to heat the cooling water, and causes the flow path switching valve to select the cooling water flow path;
A hybrid vehicle characterized by comprising: The controller is
When the vehicle interior is heated before the scheduled start time of travel, the flow path switching valve is controlled based on the difference between the engine temperature and the target temperature, and the difference between the vehicle interior temperature and the target temperature. The hybrid vehicle according to claim 1 , wherein a flow path is selected. The controller is
The flow path switching valve causes the cooling water flow path to be selected when the difference between the engine temperature and the target temperature is larger than the difference between the vehicle interior temperature and the target temperature, and when the difference is smaller, the bypass flow. The hybrid vehicle according to claim 2 , wherein a road is selected.

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