JPH09233601A - Hybrid motor vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sufficient heating performance with a high energy efficiency and less waste by operating an engine by considering the necessity of heating in a compartment. SOLUTION: When an air conditioner 76 is ON, a room temperature is detected with an indoor sensor 72, and engine water temperature is detected by an engine water temperature sensor 74. A temperature difference ΔT between a room temperature and set temperature of an air conditioner 76 is calculated, and a criterion T(x) is set based on the engine water temperature and whether a motor vehicle is in driving state or not. And if the temperature difference ΔT exceeds the criterion T(x), a judgment to operate an internal combustion engine 12 for heating is made. Also, the criterion T(x) becomes high as the engine water temperature increases and a higher value is obtained during vehicle driving than that at a stop state. That is, if the engine water temperature is high immediately after stopping of the internal combustion engine, for example, it can be used as it is as a heat source for heating, and it is not required to immediately operate the internal combustion engine 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid vehicle equipped with an engine and an electric motor as a power source for driving the vehicle, and more particularly to a hybrid vehicle which stops the operation of the engine under predetermined driving conditions.

[0002]

2. Description of the Related Art A hybrid vehicle is known in which an engine that operates by combustion of fuel and an electric motor that operates by electric energy are provided as power sources for running the vehicle. According to such a hybrid vehicle,
By selectively using the engine and the electric motor for traveling according to the operating state, the fuel consumption amount and the exhaust gas amount are reduced. The device disclosed in Japanese Patent Laid-Open No. 6-80048 is an example of such a device. In the low load region where the accelerator operation amount and the vehicle speed are low, the electric motor is used to drive, and in the high vehicle speed region where the vehicle speed is high, the engine is used to drive. In a high load region where the accelerator operation amount is large, the vehicle is driven by using both the engine and the electric motor.

[0003]

By the way, since the engine of such a hybrid vehicle is generally used as a heat source of an air conditioner, there is a problem that heating cannot be performed in an operating region where only an electric motor is used for traveling. there were. It is conceivable to provide a heat source other than the engine, but this is not preferable because it is wasteful in terms of space and energy efficiency and costs are high.

The present invention has been made in view of the above circumstances, and an object thereof is to obtain a necessary and sufficient heating performance in a hybrid vehicle in which the operation of the engine is stopped under a predetermined operating condition. To do.

[0005]

In order to achieve the above object, the first aspect of the present invention uses (a) an engine that operates by combustion of fuel and an electric motor that operates by electric energy as a power source during vehicle traveling. In addition, while stopping the operation of the engine under predetermined operating conditions, (b) in a hybrid vehicle having an air conditioner that heats the interior of the vehicle by utilizing the heat generated by the engine, (c) In consideration of necessity, a heating engine operating means for operating the engine is provided.

According to a second aspect of the present invention, in the hybrid vehicle of the first aspect, the heating engine operating means includes (a) room temperature detecting means for detecting the temperature inside the vehicle compartment, and (b) detecting the temperature of the engine. Based on the temperature difference between the engine temperature detection means, and (c) the temperature set in the air conditioning equipment and the temperature in the vehicle compartment detected by the room temperature detection means, and the engine temperature detected by the engine temperature detection means. hand,
And an operation determining means for determining whether or not to operate the engine for heating.

[0007]

In such a hybrid vehicle, the engine is operated in consideration of the need for heating the interior of the vehicle. Therefore, even if the engine needs to be heated even when the engine is in an operating state, the engine is not operated. It will be able to be operated, and necessary and sufficient heating performance will be obtained.

In the second aspect of the invention, based on the temperature difference between the set temperature of the air conditioning equipment and the temperature inside the vehicle compartment, and the temperature of the engine,
Since it is determined whether or not to activate the engine for heating, it is not necessary to activate the engine immediately if the engine temperature is high immediately after the engine is stopped and it can be fully used as a heat source even if it is left as it is. As described above, it is possible to suppress the operation of the engine to a necessary minimum without deteriorating the heating performance, and it is possible to suppress an increase in exhaust gas amount, fuel consumption amount and the like.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, the present invention relates to a switching type in which a power source is switched by connecting / disconnecting power transmission by, for example, a clutch, a combination of a planetary gear device, and the like.
At least the engine and the electric motor are provided as power sources when the vehicle is running, such as a mixed type in which the output of the engine and the electric motor are combined or distributed by the distribution mechanism, and the operation of the engine is stopped under predetermined operating conditions. Can be applied to various types of hybrid vehicles. It may be the case where an electric motor is provided for each drive wheel.

The air conditioning equipment for heating by utilizing the heat generated by the engine is constructed so that the warm air around the engine is taken into the passenger compartment through a duct by a fan or the like. In that case, the engine temperature detecting means of the second invention may detect the ambient temperature around the engine, that is, the temperature of the air actually taken into the vehicle interior, but it is formed in the engine block or the like to cool the engine water temperature, that is, the engine. It is also possible to use an engine water temperature sensor that detects the temperature of the cooling water flowing through the created flow path.

The heating engine operating means may be one that operates the engine in an idle state or the like exclusively for heating, but if the vehicle is running with an electric motor as a power source, the engine is used as a power source instead of the electric motor. It can also be configured to run as. Further, it is desirable that the heating engine operating means is configured as in the second aspect of the invention, but the engine is operated based on only the temperature difference between the set temperature of the air conditioning equipment and the room temperature, or the engine temperature is set to the heating temperature. Predetermined temperature that does not function as a heat source (eg 20 ℃)
In the following cases, various modes such as operating the engine regardless of the temperature difference can be adopted. Also in the second aspect of the invention, it is desirable to make a more detailed determination by further considering other conditions, rather than making a determination based only on the temperature difference and the engine temperature. For example, the engine and the electric motor are used properly according to the operating state. If the vehicle is traveling, it is likely that the engine will be used as a power source in the near future if the vehicle is traveling. It is possible to be strict.

The operation determining means of the second invention is configured to operate the engine when, for example, the temperature difference between the set temperature and the room temperature is equal to or greater than a predetermined determination value set according to the engine temperature. The predetermined determination value is set to a higher value, for example, as the engine temperature is higher, and it is desirable that the predetermined determination value is a higher value while the vehicle is traveling than when the vehicle is stopped.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram illustrating a drive control device 10 for a hybrid vehicle to which the present invention is applied.
The mechanical coupling relationship is shown by a thick solid line, and the electrical coupling relationship is shown by a thin line. The drive control device 10 is
An internal combustion engine 12 such as a gasoline engine that operates by combustion of fuel and an electric motor 14 that operates by electric energy are provided as power sources. The power of the internal combustion engine 12 and the electric motor 14 can be the same or alternative. To the drive wheel 20 via the speed reducer 18 having a differential function. A clutch 22 that interrupts power transmission is provided between the internal combustion engine 12 and the transmission 16 and is intermittently controlled by a clutch control actuator 38. In addition, the transmission 16
Has a forward / reverse switching mechanism that switches between forward (FWD), reverse (REV), and neutral (N) and a speed change mechanism that changes the gear ratio. The driver operates the shift lever 40 and the switch actuator 42 causes By mechanically switching the hydraulic circuit, forward, reverse, and neutral are established.

FIG. 2 is a diagram for concretely explaining an example of a vehicle drive device including the transmission 16 and the speed reducer 18 and is shown in the width direction of the vehicle like an FF (front engine / front drive) vehicle. It is a horizontal type that is installed almost parallel. The internal combustion engine 12 and the electric motor 14 are arranged in series on a common first axis so as to face each other, and their output shafts 12a and 14a are connected via a clutch 22 so that they cannot rotate relative to each other. At the same time, a chain drive (sprocket) 100 is attached to an output shaft 14 a of the electric motor 14, and transmits the power of the chain drive to a power transmission device 104 via a chain 102. The power transmission device 104 includes a toroidal type continuously variable transmission mechanism 106 arranged in series on a second axis parallel to the first axis.
A planetary gear type reduction / reverse rotation mechanism 108 and a bevel gear type differential device 110 are provided. The power is transmitted to the toroidal type continuously variable transmission mechanism 106 via a chain driven (sprocket) 112 to reduce the speed. Through the 108 and the differential device 110, the power is output to the drive wheel 20 from a pair of transmission shafts 114 and 116 arranged on their centers, that is, on the second axis. The toroidal type continuously variable transmission mechanism 106 and the reduction / reverse rotation mechanism 108 are specific examples of the transmission 16, and the differential device 110 is a specific example of the reduction gear 18.

The toroidal type continuously variable transmission mechanism 106 is
It transmits torque through traction oil with high viscoelasticity. The figure shows a double-cavity type full toroidal type, in which the inclination angles of variators (rollers) 118a and 118b are continuously controlled by a hydraulic actuator or the like. Thus, the speed ratio with respect to the output shaft 120 is continuously changed. Deceleration / reverse rotation mechanism 108
Are three sets of simple planetary gear units 122, 124, 12
6, a reverse brake B1, and a forward brake B2, and is configured as a toroidal continuously variable transmission mechanism 10.
The output shaft 120 of 6 is the simple planetary gear unit 12
It is integrally connected to 2,124 sun gears. The hydraulic circuit is switched by the switching actuator 42 in accordance with the shift operation of the shift lever 40, the reverse brake B1 is engaged, and the forward brake B2 is engaged.
Is released to establish a reverse stage for traveling the vehicle backward, and the forward brake B2 is engaged and the reverse brake B1 is released to establish a forward stage for traveling the vehicle forward, When both brakes B1 and B2 are released, a neutral stage (neutral) that cuts off power transmission is established.

The deceleration / reverse rotation mechanism 108 is adapted to decelerate both forward and reverse gears at predetermined gear ratios (gear ratio> 1), and the carrier from the simple planetary gear unit 126 to the differential device 110. Output power to. In FIG. 2, the diameters (gear ratios) of the gears of the three sets of simple planetary gear units 122, 124, 126 are equal to each other, but the diameters are appropriately set according to the desired gear ratio and the like. The power transmission device 104 is configured substantially symmetrically with respect to the center line (second axis), and a lower half from the center line is omitted in FIG.

Returning to FIG. 1, the electric motor 14 is M
(Motor) / G (generator) connected to a power storage device 26 such as a battery and a capacitor via a G (generator) control device 24, and a rotational driving state in which electric energy is supplied from the power storage device 26 and is rotationally driven at a predetermined torque. A charging state in which the power storage device 26 is charged with electric energy by functioning as a generator by regenerative braking (electric braking torque of the electric motor 14 itself); and a no-load state in which the motor shaft is allowed to rotate freely. Is switched to. Also,
The operating state of the internal combustion engine 12 is controlled by a fuel injection amount control actuator 30, a throttle control actuator 32, an ignition timing control actuator 34, an intake / exhaust valve control actuator 36, and the like. These actuators are
It is controlled by the controller 50 together with the G control device 24.

In-vehicle auxiliary machines include auxiliary machines that can be electrically driven and auxiliary machines that can be mechanically driven. Of these, an electrical accessory, that is, an accessory that is electrically driven by the discharge output of the power storage device 26 or the power storage device 46 for driving the accessory is not shown. Voltage conversion control device 4 in the figure
Reference numeral 8 denotes, for example, a chopper circuit, which converts the discharge output of the power storage device 26 into a lower voltage and supplies it to the power storage device 46 side under the control of the controller 50. The controller 50 is
The voltage conversion control device 48 is used to manage the stored amount SOC of the power storage device 46. Further, as the mechanical accessories, the accessories 51 connected to the internal combustion engine 12, the accessories 52 connected to the electric motor 14, and the accessories 5 connected to the electric motor 54.
There are six. The auxiliaries 51 and 52 are respectively the internal combustion engine 1
2 can be driven by the electric motor 14, and both can be driven by both the internal combustion engine 12 and the electric motor 14 by connecting the clutch 22. Since electric motor 54 is driven by the discharge output of power storage device 46, auxiliary machine 56 can be driven regardless of the states of internal combustion engine 12, electric motor 14 and clutch 22. In the figure, an electric motor control device 58 controls the output of the electric motor 54 under the control of the controller 50.

The controller 50 is a CPU, RAM, RO
M including a microcomputer having
The signal processing is executed in accordance with a preset program. For example, the ICE only mode in which the vehicle runs using only the internal combustion engine 12 as the power source, the electric motor only mode in which the vehicle runs using only the electric motor 14 as the power source, the internal combustion engine 12 The electric vehicle 14 is driven in four driving modes: an ICE / electric motor combined mode in which both the electric motor 14 and the electric motor 14 are used as power sources, and a power generation mode in which the electric motor 14 is driven by the internal combustion engine 12 to generate electric power. The ICE single mode, the electric motor single mode, and the combined mode are set according to the rotation speed and the torque so that the fuel consumption amount, the exhaust gas amount, and the like are reduced. In the low load region, the electric motor single mode and the medium load mode are set. In order to travel in the ICE only mode in the region and in the combined mode in the high load region, the region is defined in advance by a power source switching map having required torque and rotation speed as parameters. FIG. 6 shows an example thereof, where E ₁ is the operating region of the electric motor single mode, E ₂ is the operating region of the ICE single mode, and E ₃ is the operating region of the combined mode.

In the ICE only mode, the ICE / electric motor combined mode, and the power generation mode, the internal combustion engine 12 releases the clutch 22 even when the vehicle is stopped, or the transmission 1 is used.
By setting 6 to be neutral, the operating state (rotating state) is maintained as needed. In the electric motor only mode, the clutch 22 is released. The electric motor 14 can also be used as a starter for starting the internal combustion engine 12. It is sufficient to connect the clutch 22 and then operate the electric motor 14 to rotationally drive the internal combustion engine 12, but the clutch 22 is released. Alternatively, the starter (motor) separately installed may be used for starting.

The controller 50 is supplied with a signal representing the shift position of the shift lever 40 from the shift position switch 44 and a signal representing vehicle speed / wheel speed from the vehicle speed / wheel speed sensor 28, and is used as a start / power mode switch. An ON / OFF signal is supplied from 60.
The start / power mode switch 60 is turned on by the vehicle occupant.
An N / OFF switch is turned ON when it is known in advance that a high torque is required, for example, when the vehicle starts on a slope, when towing another vehicle, or when the on-vehicle weight is heavy. In addition, vehicle weight signal, road slope signal, towing weight signal, highway approach signal, outside air temperature signal, indoor temperature signal, brake signal, brake pedal force signal, accelerator operation amount signal, engine rotation speed _NE , motor rotation speed Signals representing N _M , engine torque, motor torque, output rotational speed N _O of the transmission 16, the amount of stored power SOC of each power storage device, etc. are supplied from various detection means.

The on-vehicle weight signal is, for example, the weight sensor 62.
And indicates the weight or total weight of the vehicle, occupants, luggage, and the like. The road gradient signal is a signal obtained from the gradient sensor 64 or the navigation system 66 and represents the road gradient at the current location of the vehicle or at a location that will soon pass. In particular, the gradient sensor 64
Is used, the gradient of the road at the current location can be obtained. When the navigation system 66 is used, the gradient of the road at the current location and / or the gradient of the road that will pass soon can be obtained. The towing weight signal is obtained by the towing sensor 68 and indicates the weight of the other vehicle being towed by the own vehicle. The information may be input by communication from the other vehicle. The highway entry signal is a signal obtained from the navigation system 66 and indicates that the vehicle has entered, is approaching, or is about to enter the highway. The outside air temperature signal and the indoor air temperature signal are signals obtained from the outdoor air temperature sensor 70 and the indoor air temperature sensor 72, respectively, and represent the temperatures outside and inside the vehicle. The room temperature sensor 72 corresponds to room temperature detecting means. The navigation system 66 outputs external signals such as a road surface gradient signal and a highway approach signal based on map information on a built-in map database or based on information from infrastructure such as roadside / gate beacons and VICS. Has been generated.

The controller 50 is also supplied with a signal representing the engine water temperature from the engine water temperature sensor 74, and is turned on by an air conditioner 76 as air conditioning equipment.
An OFF signal and a signal indicating a set temperature are supplied. The ON / OFF signal of the air conditioner 76 is
A signal representing N.OFF, which is supplied from a switch operated by an occupant. The set temperature is a temperature set by an occupant as the temperature in the vehicle interior, and the air conditioner 76 controls the cooling and heating so that the temperature in the vehicle interior, that is, the indoor temperature represented by the indoor temperature signal becomes the set temperature. When the indoor temperature is lower than the set temperature and heating is required, warm air around the internal combustion engine 12 is taken into the vehicle interior through a duct by a fan or the like. The engine water temperature sensor 74 corresponds to engine temperature detecting means.

FIG. 3 is a flowchart of a part of the series of signal processing by the controller 50, which switches the driving modes according to the driving state, and is repeatedly executed at a predetermined cycle time. In step S1,
ON / OFF signal of the start / power mode switch 60,
The various signals described above, such as the ON / OFF signal of the air conditioner 76, are read, and it is determined in step S2 whether the internal combustion engine 12 needs to be operated for heating the vehicle interior. The part of the series of signal processing by the controller 50 that executes step S2 corresponds to the heating engine operating means, and is specifically performed according to the flowchart of FIG. 4, for example.

In step R1 of FIG. 4, whether or not the air conditioner 76 is in the ON (operating) state is judged based on the ON / OFF signal, and if it is ON, steps R2 and thereafter are executed.
If it is OFF (non-operation), it is determined in step R8 that "ICE is not in operation", that is, it is not necessary to operate the internal combustion engine 12 for heating. In step R2, the room temperature is detected based on the signal supplied from the room temperature sensor 72, and in step R3, the engine water temperature is detected based on the signal supplied from the engine water temperature sensor 74. Also,
In step R4, a temperature difference ΔT (= set temperature-indoor temperature) between the set temperature of the air conditioner 76 and the indoor temperature is calculated, and in step R5, a judgment value is determined based on the engine water temperature and whether or not the vehicle is traveling. Set T (x). Then, in the next step R6, the temperature difference ΔT is equal to the determination value T.
It is determined whether or not (x) or more. If ΔT ≧ T (x), it is determined in step R7 that “ICE operation”, that is, the internal combustion engine 12 is operated for heating, and ΔT <T
In the case of (x), it is determined in step R8 that "ICE is not operating".

The determination value T (x) in step R5 is set to a higher value as the engine water temperature is higher, for example, as shown in FIG. That is, when the engine water temperature is high immediately after the internal combustion engine 12 is stopped or the like, the internal combustion engine 12 does not always have to be immediately operated because it can be sufficiently used as a heat source for heating even if it is as it is. Depending on the operating state, the ICE single mode or the combined mode may be used.
Therefore, it is not always preferable to operate the internal combustion engine 12 immediately for heating in terms of fuel consumption amount, exhaust gas amount and the like. Step R4 of the series of signal processing by the controller 50,
The portion that executes R5, R6, R7, and R8 corresponds to the operation determining means of claim 2. It should be noted that the data map, the arithmetic expression, and the like for obtaining the determination value T (x) as shown in FIG. 5 are stored in the storage device in advance.

Returning to FIG. 3, step S7 is executed if the determination in step S2 is YES, that is, if it is necessary to operate the internal combustion engine 12 for heating, otherwise step S3 is executed. . In step S3, it is determined whether or not the start / power mode switch 60 is ON. If NO, that is, if OFF, step S4 is executed, and the vehicle load / speed in the near future is determined based on the information obtained by the navigation system 66 and the like. Predict electric motor load. In the next step S5, it is determined whether or not the predicted load is in a predetermined high load region, and if it is not in the high load region, in step S6 a request from the driver given by the accelerator operation amount or the brake pedal force, A driving mode of the vehicle is determined based on, for example, the power source switching map of FIG. 6 based on the operating states of various accessories and the SOC of each power storage device. In step S9, the traveling mode is determined according to the determined driving mode. Any of steps S10 to S13 is executed. That is, the electric motor 14 is operated in step S10 in the electric motor only mode, the internal combustion engine 12 is operated in step S11 in the ICE only mode, and the internal combustion engine 1 is operated in step S12 in the combined mode.
Both the electric motor 14 and the electric motor 14 are operated, and in the power generation mode, the internal combustion engine 12 is operated to travel in step S13, and the electric motor 14 is regeneratively braked to generate electric power.

If any of the determinations in steps S2, S3, and S5 is YES, step S7 is executed,
After the internal combustion engine 12 is started to be in the idling state, the running mode is determined in step S8 in the same manner as in step S6, and steps S9 and thereafter are executed. In this case, the operating region E _{1 in} FIG. 6 is the electric motor only mode,
When the internal combustion engine 12 is operated in step S7, the combination mode is set, and in step S12, the clutch 2
The internal combustion engine 12 is operated in the idle state while releasing the number 2. In step S7, the clutch 22 is released to operate the internal combustion engine 12 in the idle state even when the vehicle is stopped. Step S7 is also executed when the determination in step S14 executed after step S10 in the electric motor independent mode is YES, that is, when the rate of change in the accelerator operation amount is large.

As described above, in this embodiment, the ON state of the switch 60 is detected, and the internal combustion engine 12 is preliminarily set to the idle state (standby operation) in response to the ON state. Therefore, the prompt operation is performed in response to the subsequent accelerator operation by the driver. In addition, the internal combustion engine 12 can be used as a power source for the traveling state. Further, even when the rate of change of the accelerator operation amount is large, the internal combustion engine 12 is set in the idle state in advance, so that it is possible to quickly respond to the driver's intention to rapidly accelerate at each moment. Further, when a sufficient output cannot be supplied to the drive wheels 20 unless the internal combustion engine 12 is operated, that is, when the vehicle load in the near future is large,
Similarly, since the internal combustion engine 12 is set in the idle state, the torque required for sudden start, starting on a slope, and the like can be immediately generated, and the shortage of torque is eliminated. The internal combustion engine 1
Similarly, when sufficient power cannot be supplied to the auxiliary machine 52 (for example, the air conditioner 76) unless the operation of the internal combustion engine 1 is performed, that is, when the electric motor load in the near future is large.
Since No. 2 is in the idle state, it is possible to prevent deterioration of the living environment in the vehicle due to insufficient output of the auxiliary equipment 52.

On the other hand, in the present embodiment, it is determined in step S2 whether or not the internal combustion engine 12 needs to be operated for heating the interior of the vehicle, and if so, step S7.
In the same manner as above, the internal combustion engine 12 is set in the idle state, so that necessary and sufficient heating performance can be obtained. Especially,
In this embodiment, the judgment value T (x) to be compared with the temperature difference ΔT between the set temperature of the air conditioner 76 and the indoor temperature is set to a higher value as the engine water temperature is higher as shown in FIG. Since the value is set to be higher than the middle value, the operation of the internal combustion engine 12 can be suppressed to a necessary minimum without deteriorating the heating performance, and an increase in exhaust gas amount, fuel consumption amount, etc. is suppressed.

Although one embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be implemented in other modes.

For example, the power transmission device 104 shown in FIG. 2 is merely an example, and the transmission mechanism and the like can be changed as appropriate, and is similarly applied to an FR (front engine / rear drive) type hybrid vehicle. Can be done.

Although the electric motor 14 also functions as a generator in the above embodiment, a generator may be provided separately from the electric motor 14.

In the above embodiment, the electric motor 14 is 1
However, the present invention can be applied to various hybrid vehicles, such as one having an electric motor 14 for each drive wheel.

Although not specifically exemplified, the present invention can be embodied in various modified and improved forms based on the knowledge of those skilled in the art.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a configuration of a drive control device for a hybrid vehicle that is an embodiment of the present invention.

FIG. 2 is a diagram showing a specific example of a transmission and a speed reducer in the drive control device of FIG.

FIG. 3 is a flowchart illustrating an operation when the drive control device of FIG. 1 switches the driving mode.

FIG. 4 is a flowchart for specifically explaining the contents of step S2 in FIG.

5 is a diagram illustrating an example of setting a determination value T (x) in step R5 of FIG.

FIG. 6 is a diagram illustrating an example of an operating region of each traveling mode in the embodiment of FIG.

[Explanation of symbols]

 12: Internal combustion engine (engine) 14: Electric motor 50: Controller 72: Indoor temperature sensor (room temperature detecting means) 74: Engine water temperature sensor (engine temperature detecting means) 76: Air conditioner (air conditioning equipment) Step S2: Heating engine operating means Steps R4 to R8: operation determination means

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Reference number in the agency FI Technical display F02D 29/02

Claims (2)

[Claims] 1. An engine that operates by combustion of a fuel and an electric motor that operates by electric energy are provided as power sources when the vehicle is running, and the operation of the engine is stopped while the engine is stopped under predetermined operating conditions. A hybrid vehicle having an air conditioning system for heating the interior of a vehicle by utilizing the heat generated by the vehicle, wherein a heating engine operating means for operating the engine is provided in consideration of the need for heating the interior of the vehicle. . 2. The heating engine operating means, a room temperature detecting means for detecting a temperature in the vehicle compartment, an engine temperature detecting means for detecting a temperature of the engine, a set temperature of the air conditioning equipment, and the room temperature detecting means. An operation determination means for determining whether or not to operate the engine for heating, based on the temperature difference between the vehicle interior temperature detected by the engine temperature and the engine temperature detected by the engine temperature detection means. The hybrid vehicle according to claim 1, which has one.