JP2011207300A - Hybrid vehicle and control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To travel by electric travel corresponding to an intention of a driver.SOLUTION: When a normal EV mode is selected, the normal EV mode is set to an execution EV mode when all of a condition that a cooling water temperature Tw, a motor temperature Tm, and an inverter temperature Tinv exist within predetermined ranges, a condition that an electricity charging rate SOC is not lower than a threshold Sev, a condition that vehicle speed V is lower than a threshold Vref, a condition that an engine is not in a warm-up state, a condition that a power switch is not turned on, a condition that heating is not requested, and a condition that a front defroster switch is turned off are established (S140 to S180) while a compulsive EV mode is set to the execution EV mode when all the conditions except for the condition that the engine is not in the warm-up state, the condition that the power switch is not on, and the condition that heating is not requested are established (S190 to S220) when the compulsive EV mode is selected. Thereby, the driver can select two EV modes.

Description

  The present invention relates to a hybrid vehicle and a control method therefor, and more specifically, an internal combustion engine capable of outputting traveling power, an electric motor capable of outputting traveling power, and a secondary battery capable of exchanging electric power with the motor. And a hybrid system that travels using only the power from the electric motor and the power from the internal combustion engine and the power from the electric motor when the internal combustion engine is stopped. The present invention relates to a hybrid vehicle and a method for controlling such a hybrid vehicle.

  Conventionally, this type of hybrid vehicle is provided with an EV switch for instructing driving by electric driving, and there is a condition for prohibiting electric driving when the EV switch is turned on immediately before starting the system or within a predetermined time after starting the system. On the condition that it is not established, there has been proposed one that starts a system without starting an engine (see, for example, Patent Document 1). In this automobile, the above-described control is performed so that the system can be started and electric running can be performed without starting the engine. Note that the condition for prohibiting the electric travel is a condition that the amount of charge of the battery is less than a predetermined value.

JP 2008-94139 A

  In the above-described hybrid vehicle, only the condition that the amount of charge of the battery is less than a predetermined value is described as a condition for prohibiting the electric driving, but as another condition, the temperature of the hybrid system is within the normal temperature range. Conditions that are outside (when low or high), conditions that the vehicle speed is higher than a predetermined value, conditions that the engine is warming up, conditions that the accelerator opening is higher than a predetermined value, front In order to ensure the visibility of the window, there are conditions such as operating the front defroster and conditions that require heating of the passenger compartment. If any of these conditions is not satisfied, turn on the EV switch. Since the system is started with the engine being started after being discarded, the noise caused by starting the engine even when you do not want to make noise in residential areas such as early morning or late night Or cause, it would cause the noise caused by the hybrid drive.

  The main purpose of the hybrid vehicle and its control method of the present invention is to travel by electric traveling according to the will of the driver.

  The hybrid vehicle of the present invention and the control method thereof employ the following means in order to achieve the main object described above.

The hybrid vehicle of the present invention
A hybrid system comprising an internal combustion engine, an electric motor capable of outputting driving power, and a secondary battery capable of exchanging electric power with the electric motor is mounted. A hybrid vehicle capable of electric traveling that travels only by power, hybrid traveling that travels using the power from the internal combustion engine and the power from the electric motor,
A plurality of predetermined driving modes including a first electric driving mode in which the electric driving is performed in accordance with the first predetermined condition and a second electric driving mode in which the electric driving is performed in accordance with a second predetermined condition different from the first predetermined condition. An execution electric travel mode setting instruction means for giving an instruction to set an electric travel mode according to a driver's operation as an execution electric travel mode from a plurality of electric travel modes consisting of conditions;
Control means for controlling the internal combustion engine and the electric motor to travel in the electric traveling based on establishment of a predetermined condition in the electric traveling mode according to the instruction when an instruction to set the execution electric traveling mode is given; ,
It is a summary to provide.

  In the hybrid vehicle of the present invention, a first electric travel mode in which electric travel is performed under the first predetermined condition and a second electric travel mode in which electric travel is performed under a second predetermined condition different from the first predetermined condition; When an instruction to set an electric driving mode according to a driver's operation as an execution electric driving mode is issued from a plurality of electric driving modes including a plurality of predetermined conditions, the instruction to set the execution electric driving mode is issued. When it is made, the internal combustion engine and the electric motor are controlled so as to travel by electric traveling based on the establishment of a predetermined condition in the electric traveling mode according to this instruction. Therefore, when the driver selects a desired electric traveling mode from among the plurality of electric traveling modes, the driver can travel on the electric traveling according to the conditions desired by the driver. That is, the vehicle can travel by electric traveling according to the driver's will. In this case, the “second predetermined condition” may be a condition that is easier to establish than the first predetermined condition.

  In such a hybrid vehicle of the present invention, the plurality of electric driving modes is a condition for permitting the electric driving mode, a condition that a storage amount as a power amount that can be discharged from the secondary battery is equal to or more than a first predetermined storage amount. A condition that the temperature of the hybrid system is within a predetermined temperature range from a predetermined lower limit temperature to a predetermined upper limit temperature, a condition that the vehicle speed is less than the predetermined vehicle speed, a condition that a power switch that requires agile dynamic characteristics of the vehicle is not turned on, Conditions under which the internal combustion engine is not warming up, conditions under which the accelerator opening is less than a predetermined degree, conditions under which operation of the front defroster for ensuring visibility in the forward direction is not required, heating of the passenger compartment The predetermined conditions are set by a plurality of different combinations including at least one of the conditions that are not required It is also possible to. A plurality of electric driving modes can be prepared by setting a plurality of predetermined conditions based on combinations of conditions permitting such electric driving modes.

  Further, in the hybrid vehicle of the present invention, the plurality of electric driving modes include a condition of canceling the electric driving mode, a vehicle speed, a state of a power switch that requires agile dynamic characteristics of the vehicle, and an air conditioner that air-conditions a passenger compartment The plurality of predetermined conditions may be set by stepwise changing at least one of the operation state of the power consumption device in the passenger compartment. A plurality of electric driving modes can be prepared by setting a plurality of predetermined conditions by changing the conditions for canceling such electric driving modes step by step.

  Further, in the hybrid vehicle of the present invention, the plurality of electric driving modes include a vehicle speed, a state of a power switch that requires an agile dynamic characteristic of the vehicle, and an air conditioner that air-conditions the passenger compartment as restrictions imposed during the electric driving. The plurality of predetermined conditions may be set by stepwise changing at least one of the operation state of the power consumption device in the passenger compartment. A plurality of electric driving modes can be prepared by setting a plurality of predetermined conditions by changing the restrictions imposed during the electric driving step by step.

  Further, in the hybrid vehicle of the present invention, the execution electric travel mode setting instruction means includes the plurality of electric travel modes based on either the number of operation times of the mode setting switch near the driver's seat or the operation time of the mode setting switch. It is also possible to provide a means for giving an instruction to set any one of them to the execution electric travel mode. In this way, the driver can travel by setting a desired electric travel mode as an execution electric travel mode from a plurality of electric travel modes by different operations of a single mode setting switch.

  Alternatively, in the hybrid vehicle according to the present invention, the plurality of electric driving modes may include a condition in which a storage amount as a power amount that can be discharged from the secondary battery is a first predetermined storage amount or more as a condition for permitting the electric driving mode. And a condition that the temperature of the hybrid system is within a predetermined temperature range from a predetermined lower limit temperature to a predetermined upper limit temperature, a condition that the vehicle speed is less than the predetermined vehicle speed, a condition that the internal combustion engine is not warming up, and an accelerator opening are predetermined. All of the plurality of conditions are satisfied, including the condition that the opening is less than the opening degree, the condition that the operation of the front defroster is not required to ensure the visibility in the forward direction, and the condition that the heating of the passenger compartment is not required. As a condition for permitting the electric driving mode and canceling the electric driving mode during operation, the temperature of the hybrid system is The condition that the temperature is out of the temperature range, the condition that the charged amount of the secondary battery is less than the second specified charged amount that is smaller than the first specified charged amount, the condition that the vehicle speed is equal to or higher than the specified vehicle speed, and the accelerator opening is the predetermined opening degree. The first driving condition is set to cancel the electric driving mode when any of the above conditions, the condition for operating the front defroster, or the condition for heating the passenger compartment is satisfied. A first electric driving mode as a predetermined condition, a condition that the electric storage amount of the secondary battery is greater than or equal to the first predetermined electric storage amount as a condition for permitting the electric driving mode, and the temperature of the hybrid system is within the predetermined temperature range And when all of a plurality of conditions including the condition that the vehicle speed is less than the predetermined vehicle speed and the condition that the operation of the front defroster is not requested are satisfied. Conditions for permitting the electric travel mode and canceling the electric travel mode are a condition that the temperature of the hybrid system is outside the predetermined temperature range, and a condition that the storage amount of the secondary battery is less than the second predetermined storage amount. Two electric driving modes, ie, a second electric driving mode in which the second predetermined condition is a condition that the electric driving mode is canceled when any of the conditions that the operation of the front defroster is required is satisfied. It can also be a running mode. If it carries out like this, it can drive | work by electric driving by setting the electric driving mode of a desired predetermined condition to the electric driving mode for execution from two electric driving modes of different predetermined conditions.

  In the hybrid vehicle of the present invention having the two electric driving modes, when the second electric driving mode is set as the execution electric driving mode, the accelerator opening is greater than or equal to the predetermined opening. Is a means for controlling the internal combustion engine and the electric motor so as to travel by the electric traveling assuming that the predetermined opening degree is set. In this way, when the second electric travel mode is set as the execution electric travel mode, the electric travel can be prioritized over the hybrid travel.

  Further, in the hybrid vehicle of the present invention having two electric driving modes, the control means is an air conditioner for air-conditioning a passenger compartment when the second electric driving mode is set as the electric driving mode for execution. It may be a means for permitting operation within a predetermined operating state range in which the operating state and / or the operating state of the electric consuming device that consumes power in the passenger compartment is equal to or lower than the predetermined power consumption. In this way, when the second electric travel mode is set as the execution electric travel mode, the electric travel can be further continued. Here, the case where only the stop state is within the predetermined operating state range is included. In this way, when the second electric travel mode is set as the execution electric travel mode, even if an air conditioner or an electric consumer device is operated in the passenger compartment, it can be canceled and the electric travel can be continued.

  Further, in the hybrid vehicle of the present invention, three rotating elements are connected to a generator capable of inputting / outputting power, a drive shaft coupled to an axle, an output shaft of the internal combustion engine, and a rotating shaft of the generator. A planetary gear mechanism, and the control means may be means for controlling the generator in addition to control of the internal combustion engine and the electric motor.

The hybrid vehicle control method of the present invention includes:
A hybrid system comprising an internal combustion engine, an electric motor capable of outputting driving power, and a secondary battery capable of exchanging electric power with the electric motor is mounted. A control method for a hybrid vehicle capable of electric travel that travels only by power, hybrid travel that travels by using power from the internal combustion engine and power from the electric motor,
A plurality of predetermined driving modes including a first electric driving mode in which the electric driving is performed in accordance with the first predetermined condition and a second electric driving mode in which the electric driving is performed in accordance with a second predetermined condition different from the first predetermined condition. An electric driving mode according to a driver's operation is set as an execution electric driving mode from a plurality of electric driving modes consisting of conditions, and the electric driving is executed based on establishment of a predetermined condition in the set execution electric driving mode. Controlling the internal combustion engine and the electric motor to
It is characterized by that.

  In the control method of the hybrid vehicle of the present invention, the second electric motor that travels by electric traveling under the second predetermined condition different from the first predetermined condition and the first electric traveling mode that travels by electric traveling under the first predetermined condition. An electric driving mode according to the driver's operation is set as an execution electric driving mode from a plurality of electric driving modes including a plurality of predetermined conditions including the driving mode, and the predetermined condition in the set execution electric driving mode is satisfied. Based on this, the internal combustion engine and the electric motor are controlled to run by electric running. Therefore, when the driver selects a desired electric traveling mode from among the plurality of electric traveling modes, the driver can travel on the electric traveling according to the conditions desired by the driver. That is, the vehicle can travel by electric traveling according to the driver's will.

1 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 20 as an embodiment of the present invention. It is a flowchart which shows an example of the EV switch process routine performed by the electronic control unit for hybrid 70 of an Example. It is a flowchart which shows an example of the normal EV mode drive control routine performed by the hybrid electronic control unit 70 of the embodiment. It is a flowchart which shows an example of the map for request | requirement torque setting. It is a flowchart which shows an example of the forced EV mode drive control routine performed by the electronic control unit for hybrid 70 of the embodiment. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 120 according to a modification. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 220 of a modified example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 320 of a modified example. FIG. 11 is a configuration diagram showing an outline of a configuration of a hybrid vehicle 420 according to a modification.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a configuration diagram showing an outline of the configuration of a hybrid vehicle 20 as an embodiment of the present invention. The hybrid vehicle 20 of the embodiment is connected to an engine 22 and a crankshaft 26 as an output shaft of the engine 22 via a damper (not shown) and to drive wheels 38a and 38b via a differential gear 37 as shown in the figure. A power distribution and integration mechanism 30 connected to the coupled drive shaft 36, a motor MG1 capable of generating electricity connected to the power distribution and integration mechanism 30, a motor MG2 attached to the drive shaft 36, a motor MG1 and a motor MG2 A battery 50 for exchanging electric power, an air conditioner 60 for air conditioning the passenger compartment, and an electronic control unit for hybrid 70 are provided.

  The engine 22 is configured as an internal combustion engine capable of outputting power using a hydrocarbon-based fuel such as gasoline or light oil, and is controlled by an engine electronic control unit (hereinafter referred to as engine ECU) 24. Although not shown, the engine ECU 24 is configured as a microprocessor centered on a CPU, and includes a ROM that stores a processing program, a RAM that temporarily stores data, an input / output port, a communication port, and the like in addition to the CPU. Signals from various sensors that detect the state of the engine 22, such as the temperature sensor 23 that detects the coolant temperature Tw, are input to the engine ECU 24 via an input port, and the engine ECU 24 sends signals to the fuel injection valve. Various control signals for driving the engine 22, such as a drive signal and a drive signal to a throttle motor for adjusting the position of the throttle valve, are output via an output port. Further, the engine ECU 24 communicates with the hybrid electronic control unit 70, controls the operation of the engine 22 by a control signal from the hybrid electronic control unit 70, and outputs data related to the operating state of the engine 22 as necessary. . The engine ECU 24 also calculates the rotational speed of the crankshaft 26, that is, the rotational speed Ne of the engine 22, based on a crank position from a crank position sensor (not shown).

  The power distribution and integration mechanism 30 is configured as a single pinion type planetary gear mechanism having three rotating elements, which are a sun gear, a ring gear, and a carrier that rotatably and revolves a plurality of pinion gears. A crankshaft 26 of the engine 22 is connected to the carrier, a motor MG1 is connected to the sun gear, and a drive shaft 36 is connected to the ring gear. When the motor MG1 functions as a generator, power from the engine 22 is input from the carrier. Is distributed to the sun gear and the ring gear according to the gear ratio, and when the motor MG1 functions as an electric motor, the power from the engine 22 input from the carrier and the power from the motor MG1 input from the sun gear are integrated and output to the ring gear. To do.

  The motor MG1 and the motor MG2 are both configured as well-known synchronous generator motors that can be driven as generators and can be driven as motors, and exchange power with the battery 50 via inverters 41 and 42. The motors MG1 and MG2 are both driven and controlled by a motor electronic control unit (hereinafter referred to as a motor ECU) 40. The motor ECU 40 receives signals necessary for driving and controlling the motors MG1 and MG2, for example, the motor MG1. , A signal from a rotation position detection sensor (not shown) for detecting the rotation position of the rotor of MG2, a phase current applied to the motors MG1 and MG2 detected by a current sensor (not shown), and a temperature sensor 44 attached to the motor MG2. The motor temperature Tm, the inverter temperature Tinv from the temperature sensor 45 that detects the temperatures of the inverters 41 and 42, and the like are input. The motor ECU 40 outputs a switching control signal to the inverters 41 and 42. The motor ECU 40 is in communication with the hybrid electronic control unit 70, controls the driving of the motors MG1 and MG2 by a control signal from the hybrid electronic control unit 70, and, if necessary, data on the operating state of the motors MG1 and MG2. Output to the hybrid electronic control unit 70. The motor ECU 40 also calculates the rotational speeds Nm1 and Nm2 of the motors MG1 and MG2 based on a signal from the rotational position detection sensor.

  The battery 50 is configured as, for example, a lithium ion secondary battery, and is managed by a battery electronic control unit (hereinafter referred to as a battery ECU) 52. The battery ECU 52 is attached to a signal necessary for managing the battery 50, for example, an inter-terminal voltage Vb from the voltage sensor 51a installed between the terminals of the battery 50, and an electric power line connected to the output terminal of the battery 50. The charging / discharging current Ib from the received current sensor 51b, the battery temperature Tb from the temperature sensor 51c attached to the battery 50, and the like are input, and data on the state of the battery 50 is electronically controlled by communication as necessary. Output to unit 70. Further, the battery ECU 52 calculates a storage ratio SOC as a ratio of the current capacity to the total capacity of the battery 50 based on the integrated value of the charge / discharge current Ib detected by the current sensor 51b in order to manage the battery 50. The input / output limits Win and Wout, which are the maximum allowable power that may charge / discharge the battery 50, are calculated based on the calculated storage ratio SOC and the battery temperature Tb. The input / output limits Win and Wout of the battery 50 are set to the basic values of the input / output limits Win and Wout based on the battery temperature Tb, and the output limiting correction coefficient and the input limiting limit are set based on the storage ratio SOC of the battery 50. It can be set by setting a correction coefficient and multiplying the basic value of the set input / output limits Win and Wout by the correction coefficient.

  The air conditioner 60 includes a compressor 64 driven by an inverter 65 connected to the power line from the battery 50, a refrigeration cycle 62 including a condenser, an expansion valve, and an evaporator (not shown), and heat exchange between the evaporator of the refrigeration cycle 62 and an engine. A blower 66 that blows air cooled by heat exchange with the cooling water 22 or heated air to the outlet 21 a of the passenger compartment 21, and an operation panel 67 attached to the passenger compartment 21. The air conditioner 60 is controlled by an air conditioning electronic control unit (hereinafter referred to as an air conditioning ECU) 68. The air conditioning ECU 68 has an on / off signal from a blower switch 67a attached to an operation panel 67 to operate on / off of the air conditioning. Similarly, a set temperature Tin * from a set temperature switch 67b which is attached to the operation panel 67 and sets the temperature in the passenger compartment 21, and a temperature sensor 67c which is attached to the operation panel 67 and detects the temperature in the passenger compartment 21. The passenger room temperature Tin and the like are input, and the air conditioning ECU 68 outputs a drive signal to the inverter 65 and the blower 66 for driving the compressor 64. The air conditioning ECU 68 drives and controls the air conditioner 60 (such as the compressor 64 and the blower 66) based on the input signal so that the passenger room temperature Tin becomes the set temperature Tin *. The air conditioning ECU 68 is in communication with the hybrid electronic control unit 70, and transmits data related to the state of the air conditioner 60 to the hybrid electronic control unit 70 as needed, or control from the hybrid electronic control unit 70. Receive signals. In the air conditioning ECU 68, the blower switch 67a is turned on, and the difference (ΔT = Tin * −Tin) between the set temperature Tin * from the set temperature switch 67b and the passenger room temperature Tin from the temperature sensor 67c requires heating. In the state (ΔT> 0), a control signal as a heating request is transmitted to the hybrid electronic control unit 70.

  The hybrid electronic control unit 70 is configured as a microprocessor centered on the CPU 72, and in addition to the CPU 72, a ROM 74 for storing processing programs, a RAM 76 for temporarily storing data, an input / output port and communication not shown. And a port. The hybrid electronic control unit 70 includes an ignition signal from an ignition switch 80, a shift position SP from a shift position sensor 82 that detects the operation position of the shift lever 81, and an accelerator pedal position sensor 84 that detects the amount of depression of the accelerator pedal 83. From the brake pedal position sensor 86 for detecting the depression amount of the brake pedal 85, the vehicle speed V from the vehicle speed sensor 88, the EV switch provided in the vicinity of the driver's seat and setting the electric travel mode EV switch signal EVSW from 90, a power switch signal PSW from the power switch 92 that is provided near the driver's seat and sets a driving mode that places more emphasis on power output than normal driving, and is provided near the driver's seat. Such as front defroster switch signal FDSW from the front defroster switch 94 for driving the defroster device (not shown) to take the clouding of guiding is input via the input port. As described above, the hybrid electronic control unit 70 is connected to the engine ECU 24, the motor ECU 40, the battery ECU 52, and the air conditioning ECU 68 via the communication port, and the engine ECU 24, the motor ECU 40, the battery ECU 52, the air conditioning ECU 68, and various control signals. And exchanging data. Here, the EV switch 90 according to the embodiment is operated from the motor MG2 in a state where the operation of the engine 22 is stopped based on the first predetermined condition by a short press of less than 1 second when the execution EV mode is not set. Select the normal EV mode that travels by electric travel that travels only by motive power, and forcibly travel by electric travel based on the second predetermined condition that is more easily established than the first predetermined condition by pressing and holding for 2 seconds or longer The EV mode is selected, and the EV mode setting is canceled with a short press of less than 1 second when the normal EV mode or the forced EV mode is set to the execution EV mode.

  The hybrid vehicle 20 of the embodiment thus configured calculates the required torque to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc and the vehicle speed V corresponding to the depression amount of the accelerator pedal 83 by the driver. Then, the operation of the engine 22, the motor MG1, and the motor MG2 is controlled so that the required power corresponding to the required torque is output to the ring gear shaft 32a. As operation control of the engine 22, the motor MG1, and the motor MG2, the operation of the engine 22 is controlled so that power corresponding to the required power is output from the engine 22, and all of the power output from the engine 22 is the power distribution and integration mechanism 30. Torque conversion operation mode for driving and controlling the motor MG1 and the motor MG2 so that the torque is converted by the motor MG1 and the motor MG2 and output to the ring gear shaft 32a, and the required power and the power required for charging and discharging the battery 50. The engine 22 is operated and controlled so that suitable power is output from the engine 22, and all or part of the power output from the engine 22 with charging / discharging of the battery 50 is the power distribution and integration mechanism 30, the motor MG1, and the motor. The required power is converted to the ring gear shaft 32 with torque conversion by MG2. Charge / discharge operation mode in which the motor MG1 and the motor MG2 are driven and controlled to be output to each other, and a motor operation mode in which the operation of the engine 22 is stopped and the power corresponding to the required power from the motor MG2 is output to the ring gear shaft 32a. and so on. Note that the torque conversion operation mode and the charge / discharge operation mode are modes in which the engine 22 and the motors MG1, MG2 are controlled so that the required power is output to the driving force 36 with the operation of the engine 22. Since there is no difference in the control, both are hereinafter referred to as the engine operation mode.

  In the engine operation mode, the hybrid electronic control unit 70 requires the required torque Tr to be output to the ring gear shaft 32a as the drive shaft based on the accelerator opening Acc from the accelerator pedal position sensor 84 and the vehicle speed V from the vehicle speed sensor 88. * Is set, and the conversion factor is converted into the rotation speed obtained by dividing the rotation speed Nr of the ring gear shaft 32a (for example, the rotation speed Nm2 of the motor MG2 by the gear ratio of the reduction gear 35) to the set required torque Tr *. And the required power for charging / discharging of the battery 50 obtained from the calculated driving power Pr * based on the storage ratio SOC of the battery 50. As a power to be output from the engine 22 by subtracting Pb * (a positive value when discharging from the battery 50) An engine using an operation line (for example, a fuel efficiency optimum operation line) as a relationship between the rotational speed Ne of the engine 22 and the torque Te that can set the desired power Pe * and output the required power Pe * from the engine 22 efficiently. The target rotational speed Ne * and the target torque Te * of 22 are set so that the rotational speed Ne of the engine 22 becomes the target rotational speed Ne * within the range of the input / output limits Win and Wout of the battery 50. A torque command Tm1 * as a torque to be output from the motor MG1 is set by the rotational speed feedback control, and a torque acting on the ring gear shaft 32a via the power distribution and integration mechanism 30 when the motor MG1 is driven by the torque command Tm1 *. The torque command Tm2 * of the motor MG2 is set by subtracting from the required torque Tr *, and the target rotational speed Ne * Send the torque Te * city to the engine ECU 24, the torque command Tm1 *, the Tm2 * is sent to the motor ECU 40. The engine ECU 24 that has received the target rotational speed Ne * and the target torque Te * then controls the intake air amount control and fuel injection control of the engine 22 so that the engine 22 is operated by the target rotational speed Ne * and the target torque Te *. Perform ignition control. The motor ECU 40 that has received the torque commands Tm1 * and Tm2 * performs switching control of the switching elements of the inverters 41 and 42 so that the motors MG1 and MG2 are driven by the torque commands Tm1 * and Tm2 *. Traveling in this engine operation mode is called hybrid travel.

  In the motor operation mode, the hybrid electronic control unit 70 sets the torque command Tm1 * of the motor MG1 to a value of 0 and the required torque Tr * as a drive shaft within the range of the input / output limits Win and Wout of the battery 50. The torque command Tm2 * of the motor MG2 is set so as to be output to the shaft 32a and transmitted to the motor ECU 40. Then, the motor ECU 40 that receives the torque commands Tm1 * and Tm2 * performs switching control of the switching elements of the inverters 41 and 42 so that the motors MG1 and MG2 are driven by the torque commands Tm1 * and Tm2 *. Traveling in this motor operation mode is called electric travel.

  The hybrid vehicle 20 according to the embodiment travels by electric travel by comparing the start determination power or the stop determination power and the required power Pe * that are determined in advance for operation start or operation stop when the engine 22 is intermittently operated. A hybrid travel mode in which the vehicle travels by hybrid travel or an electric travel mode in which the vehicle travels only by electric travel. When the normal EV mode or the forced EV mode is set as the execution EV mode by the EV switch 90, the electric travel is performed. The vehicle travels in the mode, and when the execution EV mode is canceled by the EV switch 90, the vehicle travels in the hybrid travel mode.

  Next, the operation of the hybrid vehicle 20 of the embodiment configured as described above, particularly the operation when the EV switch 90 is operated will be described. FIG. 2 is a flowchart showing an example of an EV switch processing routine executed by the hybrid electronic control unit 70 when the EV switch 90 is operated.

  When the EV switch processing routine is executed, the CPU 72 of the hybrid electronic control unit 70 first presses the EV switch 90 for a long time or presses it for less than 1 second when the execution EV mode is not set. (Step S100: YES), or whether it is a short press of less than 1 second when the normal EV mode or the forced EV mode is set to the execution EV mode (step S100: NO) ( Step S100), when the normal EV mode or the forced EV mode is set to the execution EV mode and the short press is less than 1 second, the execution EV mode is canceled (step S110), and this routine is terminated. To do. When the execution EV mode is canceled, as described above, the vehicle travels in the hybrid travel mode in which the vehicle travels by electric travel or travels by hybrid travel.

  If it is determined in step S100 that the normal EV mode or the forced EV mode is selected, the power switch signal PSW from the power switch 92, the front defroster switch signal FDSW from the front defroster switch 94, the vehicle speed V from the vehicle speed sensor 88, Data necessary for permitting the EV mode such as the cooling water temperature Tw, the motor temperature Tm, the inverter temperature Tinv, the storage ratio SOC of the battery 50, the heating request, and the operating state of the engine 22 are input (step S120). It is determined whether the normal EV mode or the forced EV mode is selected by the operation (step S130). Here, the coolant temperature Tw detected by the temperature sensor 23 is input from the engine ECU 24 by communication. The motor temperature Tm and the inverter temperature Tinv detected by the temperature sensors 44 and 45 are input from the motor ECU 40 by communication. The storage rate SOC is calculated based on the integrated value of the charge / discharge current Ib detected by the current sensor 51b and is input from the battery ECU 52 by communication. As the heating request, what is transmitted from the air conditioning ECU 68 is input by communication. As the operation state of the engine 22, a stop state, a warm-up operation state, and a normal operation state are input by communication from the engine ECU 24.

  When it is determined in step S130 that the normal EV mode is selected, the cooling water temperature Tw is equal to or higher than the range lower limit temperature Twref1 that is set in advance as a range in which the cooling water temperature of the engine 22 is not too low and not too high. Conditions that are within the range of less than Twref2, conditions that the motor temperature Tm is not lower than the temperature of the motor MG2 and that is not too high, conditions that are not less than the range lower limit temperature Tmref1 that is greater than or equal to the range upper limit temperature Tmref2, and inverter temperature The condition in which Tinv is within the range lower than the range upper limit temperature Tiref2 and higher than the range lower limit temperature Tiref1 set in advance as a range where the temperature of the inverters 41 and 42 is not too low and not too high, and the storage ratio SOC of the battery 50 sets the EV mode. Threshold S determined in advance as the lower limit storage ratio that may be It is confirmed that all of the conditions of v or higher and the condition that the vehicle speed V is less than a predetermined threshold value Vref as the upper limit vehicle speed at which the EV mode may be set are satisfied (step S140), and the engine 22 is warmed up. It is confirmed that all conditions of the condition that the machine is not operating, the condition that the power switch signal PSW is not ON, and the condition that the heating request is not made are satisfied (step S150), and the front defroster switch signal FDSW is OFF. It is confirmed that a certain condition is satisfied (step S160). When all the conditions are satisfied (step S170), the normal EV mode is set as the execution EV mode (step S180), and this routine is terminated. On the other hand, when it cannot be confirmed that any of the conditions in steps S140 to S160 is satisfied, the EV switch signal ESW is canceled (step S230), and this routine is terminated. Here, the condition that the cooling water temperature Tw is not less than the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2, and the condition that the motor temperature Tm is not less than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, and the inverter temperature Tinv. Is within the range lower than the range upper limit temperature Tiref1 and lower than the range upper limit temperature Tiref2 is the temperature condition of the hybrid system by the engine 22, the motors MG1, MG2, the power distribution and integration mechanism 30, and the like. The condition that the storage ratio SOC of the battery 50 is greater than or equal to the threshold value Sev and the condition that the vehicle speed V is less than the threshold value Vref can be considered as protection requirements for the hybrid system and its components against the EV mode setting. Further, a condition where the power switch signal PSW is not on or a condition where no heating request is made can be considered as a requirement for convenience of use of the vehicle by the driver, and a condition where the front defroster switch signal FDSW is off is a safety for driving. It can be considered as a requirement by ensuring the sex.

  When it is determined in step S130 that the forced EV mode is selected, the temperature condition of the hybrid system described above, the condition that the storage ratio SOC of the battery 50 is equal to or higher than the threshold value Sev, and the condition that the vehicle speed V is lower than the threshold value Vref, It is confirmed that all conditions are satisfied (step S190), and that the condition that the front defroster switch signal FDSW is OFF is confirmed (step S200). When all these conditions are satisfied (step S210). Then, the forced EV mode is set as the execution EV mode (step S220), and this routine is terminated. That is, when the forced EV mode is selected, compared to when the normal EV mode is selected, a condition in which the engine 22 is not warming up, a condition in which the power switch signal PSW is not on, a heating request The forced EV mode is set regardless of whether or not a condition that is not performed is satisfied. Therefore, when the normal EV mode is selected by the EV switch 90, the EV switch signal ESW is not satisfied due to the failure of the condition that the engine 22 is not warming up, the condition that the power switch signal PSW is not on, or the condition that the heating request is not made. The EV switch signal ESW is not canceled even if these conditions are not satisfied when the forced EV mode is selected by the EV switch 90. Therefore, the setting of the forced EV mode to the execution EV mode is more relaxed than the setting of the normal EV mode to the execution EV mode. On the other hand, when the establishment of any one of the conditions of steps S190 and S200 cannot be confirmed, the EV switch signal ESW is canceled (step S230), and this routine is terminated.

  Next, an operation when the normal EV mode is set to the execution EV mode will be described. FIG. 3 is a flowchart showing an example of a normal EV mode drive control routine executed by the hybrid electronic control unit 70 when the normal EV mode is set to the execution EV mode. This routine is repeatedly executed at predetermined time intervals (for example, every several milliseconds) while the normal EV mode is set to the execution EV mode and the vehicle is traveling in the electric travel mode.

  When the normal EV mode drive control routine is executed, the CPU 72 of the hybrid electronic control unit 70 first starts the accelerator opening Acc from the accelerator pedal position sensor 84, the rotational speed Nm2 of the motor MG2, and the vehicle speed V from the vehicle speed sensor 88. , Storage ratio SOC of battery 50, power switch signal PSW from power switch 92, front defroster switch signal FDSW from front defroster switch 94, cooling water temperature Tw, motor temperature Tm, inverter temperature Tinv, heating requirement, output limit of battery 50 A process of inputting data necessary to travel in the electric travel mode such as Wout is executed (step S300). Here, the rotational speed Nm2 of the motor MG2 is calculated from the rotational position of the rotor of the motor MG2 detected by a rotational position detection sensor (not shown) and input from the motor ECU 40 by communication. The output limit Wout of the battery 50 is set based on the battery temperature Tb of the battery 50 and the storage ratio SOC of the battery 50 and is input from the battery ECU 52 by communication.

  When the data is input in this way, the condition that the cooling water temperature Tw is within the range of the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2, or the condition that the motor temperature Tm is greater than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, Whether or not a hybrid system temperature condition such as a condition that the inverter temperature Tinv is equal to or higher than the range lower limit temperature Tiref1 and lower than the range upper limit temperature Tiref2 is satisfied (steps S310 and S320), and the storage ratio SOC of the battery 50 is EV Whether or not a condition that is equal to or greater than a predetermined power storage ratio Shv set in advance as a value smaller than the above-described predetermined power storage ratio Sev as a power storage ratio for releasing the mode is satisfied (step S330), and a condition that the vehicle speed V is less than the threshold value Vref (Step S3) 0), whether the condition that the heating request is not made is satisfied (step S350), whether the condition that the power switch signal PSW is not ON is satisfied (step S360), and the front defroster switch signal FDSW is OFF Whether or not the condition is satisfied (step S370), and whether or not the condition that the accelerator opening Acc is less than a predetermined opening Aref predetermined as a value for releasing the EV mode is satisfied (step S380). , And if it is not confirmed that any of these conditions is satisfied, the normal EV mode is canceled (step S450), and this routine is terminated. When the normal EV mode is canceled, the electric travel mode is canceled and the hybrid electronic control unit 70 performs drive control in the hybrid travel mode.

  When it is confirmed that all the conditions of steps S310 to S380 are satisfied, a required torque Tr * required for the drive shaft 36 is set based on the input accelerator opening Acc and the vehicle speed V (step S390). Then, the required power P * required for traveling is calculated by multiplying the required torque Tr * by the rotation speed Nm2 of the motor MG2 (step S400), and the required torque Tr * is equal to or lower than the upper limit value Tm2max as the rated value of the motor MG2. Whether or not the requested power P * is equal to or less than the power obtained by multiplying the conversion count kw by the output limit Wout of the battery 50 (step S420). Here, in the embodiment, the required torque Tr * is stored in the ROM 74 as a required torque setting map by predetermining the relationship among the accelerator opening Acc, the vehicle speed V, and the required torque Tr *. When the vehicle speed V is given, the corresponding required torque Tr * is derived and set from the stored map. FIG. 4 shows an example of the required torque setting map. The conversion count kw is a coefficient for converting electric power into drive system power. When required torque Tr * exceeds upper limit value Tm2max, or even when required torque Tr * is lower than upper limit value Tm2max, required power P * exceeds the power obtained by multiplying conversion count kw by output limit Wout of battery 50. If it is determined that the driver's request cannot be satisfied, the normal EV mode is canceled (step S450), and this routine is terminated.

  When the required torque Tr * is equal to or lower than the upper limit value Tm2max and the required power P * is equal to or lower than the power obtained by multiplying the conversion count kw by the output limit Wout of the battery 50, it is determined that the driver's request can be satisfied, and the required torque Tr * is set to the torque command Tm2 * of the motor MG2 (step S430), the set torque command Tm2 * is transmitted to the motor ECU 40 (step S440), and this routine ends. Receiving the torque command Tm2 *, the motor ECU 40 performs switching control of the switching element of the inverter 42 so that the motor MG2 is driven by the torque command Tm2 *.

  Next, an operation when the forced EV mode is set to the execution EV mode will be described. FIG. 5 is a flowchart illustrating an example of a forced EV mode drive control routine that is executed by the hybrid electronic control unit 70 when the forced EV mode is set to the execution EV mode. This routine is repeatedly executed at predetermined time intervals (for example, every several milliseconds) while the forced EV mode is set to the execution EV mode and the vehicle is traveling in the electric travel mode. When the forced EV mode is set to the execution EV mode, in the embodiment, in addition to the drive control by the drive control routine of FIG. 5, in order to maintain the electric travel mode, the operation of the air conditioner 60 is prohibited, the passenger compartment The operation of the power consuming device such as the audio is disabled and the operation of the power switch 92 is invalidated. The significance of these will be described later.

  When the forced EV mode drive control routine is executed, first, the CPU 72 of the hybrid electronic control unit 70 first determines the accelerator opening Acc from the accelerator pedal position sensor 84, the rotational speed Nm2 of the motor MG2, and the vehicle speed V from the vehicle speed sensor 88. The battery 50 is forced to travel in the electric travel mode such as the storage ratio SOC of the battery 50, the front defroster switch signal FDSW from the front defroster switch 94, the cooling water temperature Tw, the motor temperature Tm, the inverter temperature Tinv, and the output limit Wout of the battery 50. Necessary data is input (step S500).

  Subsequently, the condition that the cooling water temperature Tw is within the range of the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2, the condition that the motor temperature Tm is greater than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, the inverter temperature Tinv Whether or not a hybrid system temperature condition such as a condition that is within the range lower than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2 is satisfied (steps S510, S520), and the storage ratio SOC of the battery 50 is the predetermined storage ratio Shv It is determined whether or not the above condition is satisfied (step S530), and whether or not the condition that the front defroster switch signal FDSW is OFF is satisfied (step S540), and any one of these conditions is satisfied. When it is not confirmed that forced EV mode To cancel (step S630), and ends the present routine. When the forced EV mode is canceled, the electric travel mode is canceled and the hybrid electronic control unit 70 performs drive control in the hybrid travel mode. In the forced EV mode, as compared with the normal EV mode, a condition where the vehicle speed V is less than the threshold value Vref, a condition where no heating request is made, a condition where the power switch signal PSW is not on, an accelerator opening Acc is a predetermined opening Aref. The condition of less than the condition is excluded from the condition for canceling the EV mode. This is because, except for the conditions relating to the vehicle speed V and the accelerator opening degree Acc, the condition where the heating request is not made is established by prohibiting the operation of the air conditioner 60, and the condition where the power switch signal PSW is not on is the power switch 92. This is based on the fact that it is established by invalidation of the operation. Even in the forced EV mode, it is confirmed that all of the temperature conditions of the hybrid system, the condition that the storage ratio SOC of the battery 50 is greater than or equal to the predetermined storage ratio Shv, and the condition that the front defroster switch signal FDSW is OFF are satisfied. This is because even if the electric travel mode is forcibly continued, it is necessary to give priority to the requirements of the hybrid system and its components and the safety requirements.

  When it is confirmed that all the conditions of steps S510 to S540 are satisfied, it is determined whether or not the accelerator opening Acc is equal to or greater than the threshold value Aref (step S550). When the accelerator opening Acc is equal to or greater than the threshold value Aref, the threshold value is determined. Aref is set as a new accelerator opening degree Acc (step S560). In this way, by setting the accelerator opening Acc, the upper limit guard is performed with the threshold Aref for a driver's request for which the accelerator opening Acc exceeds the threshold Aref. The reason why the accelerator opening Acc is less than the predetermined opening Aref is excluded from the condition for canceling the forced EV mode. Thus, the upper limit of the accelerator opening Acc is guarded by the threshold value Aref, and it is necessary to set this condition. Because there is no.

  Next, the accelerator opening Acc and the vehicle speed V are applied to the required torque setting map of FIG. 4 to set the required torque Tr * (step S570), and the required torque Tr * is the upper limit value as the rated value of the motor MG2. Compared with Tm2max (step S580), when the required torque Tr * exceeds the upper limit value Tm2max, the upper limit value Tm2max is set as a new required torque Tr * (step S590). That is, the upper limit of the required torque Tr * is guarded with the rated value of the motor MG2. Then, the value obtained by multiplying the conversion coefficient Kw by the output limit Wout of the battery 50 is divided by the rotational speed Nm2 of the motor MG2 to set the torque limit Tlim (step S600), and among the required torque Tr * and the torque limit Tlim The smaller one is set as the torque command Tm2 * of the motor MG2 (step S610), the set torque command Tm2 * is transmitted to the motor ECU 40 (step S620), and this routine is finished. Thus, the upper limit of the required torque Tr * is guarded by the rated value of the motor MG2, and the torque limit Tlim by the output limit Wout of the battery 50 is imposed to set the torque command Tm2 * of the motor MG2, thereby limiting the output of the battery 50. The electric travel mode is forcibly continued within the range of Wout and the range of the rated value of the motor MG2. Thus, in order to limit the torque of the motor MG2, the condition that the vehicle speed V is equal to or higher than the threshold value Vref may be excluded from the condition for canceling the forced EV mode.

  When the forced EV mode is set to the execution EV mode as described above, the hybrid system and its components are controlled by limiting the accelerator opening Acc and the torque designation Tm2 * of the motor MG2 as understood from the drive control described above. As long as the above requirements are satisfied and the safety requirements are satisfied, the EV mode is continued. Thus, in order to continue the EV mode as much as possible, it is necessary to suppress the power consumption of the battery 50 other than traveling. For this reason, when the forced EV mode is set to the execution EV mode, the operation of the air conditioner 60 is prohibited and the operation of the power consuming equipment such as the audio in the passenger compartment is prohibited.

  According to the hybrid vehicle 20 of the embodiment described above, by selecting the normal EV mode by operating the EV switch 90, the vehicle travels in the electric travel mode when the condition for continuing the EV mode to some extent is satisfied. By selecting the forced EV mode by operating the EV switch 90, it is possible to forcibly travel in the electric travel mode as long as the system and component requirements and the safety requirements are satisfied. That is, by setting EV modes of two different permission conditions and cancellation conditions, and by causing the driver to select a desired EV mode by operating the EV switch 90, the electric driving mode can be changed according to the driver's desired EV mode. You can travel. When the EV switch 90 is not set as the operation mode, the normal EV mode is selected by a short press for less than 1 second, the forced EV mode is selected by a long press for 2 seconds or more, and the normal EV mode is selected. When the forced EV mode is set to the execution EV mode, the EV mode setting is canceled by a short press of less than 1 second, so that a plurality of EV modes can be selected with a single switch.

  In the hybrid vehicle 20 of the embodiment, as a permission condition for setting the normal EV mode to the execution EV mode, a condition in which the coolant temperature Tw is within the range lower than the range lower limit temperature Twref1 and lower than the range upper limit temperature Twref2, and the motor temperature Tm is in the range. A condition that is lower than the lower limit temperature Tmref1 and lower than the upper limit temperature range Tmref2, a condition that the inverter temperature Tinv is higher than the lower limit temperature temperature Tiref1 and lower than the upper limit temperature range Tiref2, and the storage ratio SOC of the battery 50 is equal to or higher than the threshold value Sev. Certain conditions, conditions where the vehicle speed V is less than the threshold value Vref, conditions where the engine 22 is not warming up, conditions where the power switch signal PSW is not on, conditions where no heating request is made, and the front defroster switch signal FDSW is off All of the conditions are met However, a condition that some of all the conditions in the embodiment are satisfied may be set as a permission condition for setting the normal EV mode to the execution EV mode, or all the conditions in the embodiment are all satisfied. As a permission condition for setting the normal EV mode to the execution EV mode, all other conditions such as a condition not traveling on a rough road or a condition not traveling on a high altitude are satisfied. Alternatively, a condition that some of all the conditions in the embodiment are satisfied and that all the other conditions are satisfied may be used as a permission condition for setting the normal EV mode to the execution EV mode. Good.

  In the hybrid vehicle 20 of the embodiment, as a permission condition for setting the forced EV mode to the execution EV mode, the condition that the cooling water temperature Tw is within the range of the range lower limit temperature Twref1 or more and less than the range upper limit temperature Twref2, the motor temperature Tm is in the range. The condition that the temperature is lower than the lower limit temperature Tmref1 and lower than the upper limit temperature range Tmref2, the condition that the inverter temperature Tinv is higher than the lower limit temperature temperature Tiref1 and lower than the upper limit temperature range Tiref2, and the storage ratio SOC of the battery 50 is the predetermined power storage ratio Sev Although all of the above conditions and the condition that the front defroster switch signal FDSW is OFF are satisfied, it is compulsory that some of all the conditions of the embodiment are satisfied. The permission condition for setting the mode to the EV mode for execution may be used. The EV for executing the forced EV mode indicates that all the other conditions are satisfied and other conditions such as a condition not traveling on a rough road and a condition not traveling on a high altitude are satisfied. It is good also as permission conditions set to mode, and forced EV mode is made into execution EV mode that some conditions of all the conditions of an Example are satisfied and all the other conditions are satisfied. It is good also as permission conditions set to.

  In the hybrid vehicle 20 of the embodiment, as a permission condition for setting the forced EV mode to the execution EV mode, the condition that the cooling water temperature Tw is equal to or higher than the range lower limit temperature Twref1 and lower than the range upper limit temperature Twref2, the motor temperature Tm is The condition that the range temperature is lower than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, the condition that the inverter temperature Tinv is greater than or equal to the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, and the storage ratio SOC of the battery 50 is the predetermined storage ratio The condition of Sev or higher and the condition that the front defroster switch signal FDSW is OFF are the same as the conditions for setting the normal EV mode to the execution EV mode, but the normal EV mode is set to the execution EV mode. It may be a condition that is more easily established than the actual condition. For example, the cooling water temperature Tw is set to a condition that is within the range of the temperature Twref3 lower than the range lower limit temperature Twref1 and higher than the range upper limit temperature Twref2 and lower than the temperature Twref4, or the motor temperature Tm is a temperature Tmref3 higher than the range lower limit temperature Tmref1. The condition is that the temperature is within the range below the temperature Tmref4 that is higher than the range upper limit temperature Tmref2, or the condition that the inverter temperature Tinv is within the range below the temperature Tiref4 that is higher than the range upper limit temperature Tiref2 and higher than the range upper limit temperature Tiref2 Alternatively, the condition may be such that the storage ratio SOC of the battery 50 is equal to or higher than the storage ratio Sref1 smaller than the predetermined storage ratio Shv.

  In the hybrid vehicle 20 of the embodiment, as a condition for canceling the normal EV mode, a condition in which the cooling water temperature Tw is outside the range of the range lower limit temperature Twref1 or more and less than the range upper limit temperature Twref2, the motor temperature Tm is in the range of the range lower limit temperature Tmref1 or more. Conditions that are outside the range below the upper limit temperature Tmref2, conditions that the inverter temperature Tinv is not less than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, conditions that the storage ratio SOC of the battery 50 is less than the predetermined storage ratio Shv, vehicle speed The condition that V is equal to or greater than the threshold value Vref, the condition that the heating request is made, the condition that the power switch signal PSW is turned on, the condition that the front defroster switch signal FDSW is turned on, and the accelerator opening Acc is greater than or equal to the predetermined opening Aref One of the conditions However, even if some of the conditions of the embodiment are satisfied, the normal EV mode may not be canceled, or other conditions other than the conditions of the embodiment, for example, on a rough road The normal EV mode may be canceled when one of other conditions such as a certain condition or a condition of traveling at a high altitude is satisfied.

  In the hybrid vehicle 20 of the embodiment, as a condition for canceling the forced EV mode, a condition in which the coolant temperature Tw is outside the range of the range lower limit temperature Twref1 or more and less than the range upper limit temperature Twref2, and the motor temperature Tm is in the range of the range lower limit temperature Tmref1 or more. A condition that is outside the range below the upper limit temperature Tmref2, a condition that the inverter temperature Tinv is not less than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, a condition that the storage ratio SOC of the battery 50 is less than the predetermined storage ratio Shv, front One of the conditions in which the defroster switch signal FDSW is turned on is satisfied. However, the forced EV mode may not be canceled even if some of the conditions in the embodiment are satisfied. Other conditions other than the conditions of the embodiment, for example, rough road running Or as to cancel the forced EV mode when any other condition, such condition is a condition or high altitude travel is is established.

  In the hybrid vehicle 20 of the embodiment, as a condition for canceling the forced EV mode, the cooling water temperature Tw is not less than the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2, and the motor temperature Tm is not less than the range lower limit temperature Tmref1. A condition that is outside the range below the range upper limit temperature Tmref2, a condition that the inverter temperature Tinv is equal to or higher than the range lower limit temperature Tiref1 and is outside the range below the range upper limit temperature Tiref2, a condition that the storage rate SOC of the battery 50 is less than the predetermined storage rate Shv, Is the same as the condition for canceling the normal EV mode, but may be a condition that is more difficult to establish than the condition for canceling the normal EV mode. For example, the cooling water temperature Tw is set to be outside the range of the temperature Twref5 lower than the range lower limit temperature Twref1 and lower than the temperature Twref6 higher than the range upper limit temperature Twref2, or the motor temperature Tm is higher than the temperature Tmref5 lower than the range lower limit temperature Tmref1. A condition that is outside the range below the temperature Tmref6 that is higher than the range upper limit temperature Tmref2, or that the inverter temperature Tinv is outside the range below the temperature Tiref6 that is higher than the range upper limit temperature Tiref2 and higher than the range lower limit temperature Tiref1 Alternatively, a condition may be set such that the storage ratio SOC of the battery 50 is less than the storage ratio Sref2 that is smaller than the predetermined storage ratio Shv.

  In the hybrid vehicle 20 of the embodiment, when the forced EV mode is set to the execution EV mode, the upper limit of the accelerator opening Acc is guarded by the threshold value Aref. However, the forced EV mode is set to the execution EV mode. The accelerator opening degree Acc may not be guarded at the upper limit with the threshold value Aref, or the forced EV mode may be canceled when the accelerator opening degree Acc becomes equal to or greater than the threshold value Aref.

  In the hybrid vehicle 20 of the embodiment, when the forced EV mode is set to the execution EV mode, the operation of the air conditioner 60 and the operation of the power consuming equipment such as the audio in the passenger compartment are prohibited. The operation restriction of the device 60 and the operation restriction of the power consuming device such as the audio in the passenger compartment may be executed. For example, for the air conditioner 60, the compressor 64 and the blower 66 are driven within a range of up to 1/3 of the maximum power consumption, or the total power consumption of the air conditioner 60 and other power consuming devices is The air conditioner 60 and other power consuming devices may be operated within a predetermined power range or less.

  In the hybrid vehicle 20 of the embodiment, the two EV modes of the normal EV mode and the forced EV mode can be selected as the EV mode. However, three or more EV modes may be selected. In this case, as permission conditions for the EV mode, the cooling water temperature Tw is in the range of the range lower limit temperature Twref1 or more and less than the range upper limit temperature Twref2, and the motor temperature Tm is in the range of the range lower limit temperature Tmref1 or more and less than the range upper limit temperature Tmref2. A condition where the inverter temperature Tinv is within the range lower than the range lower limit temperature Tiref1 and lower than the range upper limit temperature Tiref2, a condition where the storage ratio SOC of the battery 50 is equal to or higher than the threshold Sev, a condition where the vehicle speed V is lower than the threshold Vref, Three or more combinations different from a plurality of items such as the condition that the engine 22 is not warming up, the condition that the power switch signal PSW is not on, the condition that the heating request is not made, and the condition that the front defroster switch signal FDSW is off Making all the conditions for each item difficult Sequentially first EV mode, the second EV mode, or the like third EV mode. For example, the items of the first EV mode and the item of the third EV mode are the same as the items of the normal EV mode and the forced EV mode of the embodiment, and the forced EV mode of the embodiment is set as the second EV mode item. It can be considered that an intermediate EV mode is added by adding an item of a condition where no heating request is made in addition to the item of the EV mode. Also, three or more EV modes may be set by changing the degree of condition for any one or two or more items of the above-described EV mode permission conditions. For example, the items in the first EV mode and the items in the third EV mode are the same as the items in the normal EV mode and the forced EV mode in the embodiment, and have the same conditions, and the third EV mode. The item of the compulsory EV mode is the same as the item of the compulsory EV mode, but the item of the condition of the storage ratio SOC of the battery 50 is the super compulsory EV mode in which the storage ratio SOC is equal to or greater than the threshold value Shv smaller than the threshold value Sev as the condition level. The items for the permission conditions for the three EV modes are the same, but the condition that the storage ratio SOC is equal to or greater than the threshold S1 when the storage ratio SOC condition item for the battery 50 is S1> S2> S3. 1 EV mode, the condition that the storage ratio SOC is equal to or greater than the threshold value S2 is the second EV mode, and the condition that is equal to or greater than the threshold value S3 is the third EV mode. Three temperature ranges with different temperature ranges are set for some or all of the items of cooling water temperature Tw, motor temperature Tm, inverter temperature Tinv, and the temperature at which some or all of the items are the narrowest The range condition is the first EV mode, and part or all of the items are in the intermediate temperature range, and the second EV mode is the part of the items. A certain condition may be the third EV mode.

  Further, in order to be able to select three or more EV modes, as a condition for canceling the EV mode, a condition that the cooling water temperature Tw is outside the range of the range lower limit temperature Twref1 or more and less than the range upper limit temperature Twref2, the motor temperature Tm Is the range lower than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, the inverter temperature Tinv is greater than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, and the storage ratio SOC of the battery 50 is the predetermined power storage. Conditions under which the ratio is less than Shv, conditions where the vehicle speed V is greater than or equal to the threshold value Vref, conditions where heating is requested, conditions where the power switch signal PSW is turned on, conditions where the front defroster switch signal FDSW is turned on, accelerator opening Conditions where Acc is greater than or equal to the predetermined opening Aref, etc. Three or more different combinations may be created from a plurality of items, and the first EV mode, the second EV mode, the third EV mode, etc. may be used in the order in which one of the conditions of each item is satisfied. . For example, the items of the first EV mode and the item of the third EV mode are the same as the items of the normal EV mode and the forced EV mode of the embodiment, and the forced EV mode of the embodiment is set as the second EV mode item. It can be considered that the intermediate EV mode is added by adding the condition that the heating request is made in addition to the item of the EV mode. Also, three or more EV modes may be set by changing the degree of the condition for any one or two or more items of the conditions for canceling the above-described EV mode. For example, the items in the first EV mode and the items in the second EV mode are the same as the items in the normal EV mode and the forced EV mode in the embodiment and have the same conditions, and the third EV mode. The item of the compulsory EV mode is the same as the item of the compulsory EV mode, but the item of the condition of the storage ratio SOC of the battery 50 is set to the super compulsory EV mode in which the storage ratio SOC is less than the threshold value Smin which is smaller than the threshold value Shv. Or, the items for the conditions for canceling the three EV modes are the same, but the condition for the storage rate SOC to be less than the threshold value S4 when S4> S5> S6 is set for the item for the storage rate SOC of the battery 50. The first EV mode is set, the condition that the storage rate SOC is less than the threshold value S5 is the second EV mode, and the storage rate SOC is less than the threshold value S6. The third EV mode is set, or three temperature ranges with different temperature ranges are set for some or all of the items of the cooling water temperature Tw, the motor temperature Tm, and the inverter temperature Tinv. The condition that a part or all of the items are outside the narrowest temperature range is the first EV mode, and the condition that a part or all of the items are outside the intermediate temperature range is the second EV mode. A condition in which part or all of the temperature is outside the widest temperature range may be the third EV mode.

  Furthermore, in order to be able to select three or more EV modes, three or more EV modes may be obtained by changing the restriction during driving when the EV mode is set to the execution EV mode. For example, three or more EVs can be obtained by changing the upper limit guard of the accelerator opening Acc, changing the operation limit of the air conditioner 60, or changing the operation limit of power consuming equipment such as audio in the passenger compartment. A mode may be set.

  In the hybrid vehicle 20 of the embodiment, as the EV switch 90, the motor MG2 is stopped in a state where the operation of the engine 22 is stopped based on the first predetermined condition by a short press of less than 1 second when the execution EV mode is not set. Select the normal EV mode that travels by electric travel that travels only with the power from, and travel by electric travel based on the second predetermined condition that is easier to establish the condition than the first predetermined condition by long pressing for 2 seconds or longer The forced EV mode is selected and the EV mode setting is canceled with a short press for less than 1 second when the normal EV mode or the forced EV mode is set to the execution EV mode. Thus, any switch operation may be performed as long as selection of the normal EV mode, selection of the forced EV mode, and selection of cancellation of the EV mode are possible. Further, a dial type switch having three positions, that is, an EV mode release position, a normal EV mode position, and a forced EV mode position may be used as the EV switch.

  In the hybrid vehicle 20 of the embodiment, the power of the motor MG2 is output to the drive shaft 36. However, as illustrated in the hybrid vehicle 120 of the modification of FIG. 6, the drive shaft 36 is connected to the power of the motor MG2. It may be connected to an axle (an axle connected to the wheels 39a and 39b in FIG. 6) different from the other axle (the axle to which the drive wheels 38a and 38b are connected).

  In the hybrid vehicle 20 of the embodiment, the power of the engine 22 is output to the drive shaft 36 connected to the drive wheels 38a and 38b via the power distribution and integration mechanism 30, but the hybrid vehicle 220 of the modified example of FIG. As shown in FIG. 4, the engine 22 has an inner rotor 232 connected to the crankshaft 26 and an outer rotor 234 connected to a drive shaft 36 that outputs power to the drive wheels 38a and 38b. A counter-rotor motor 230 that transmits a part of the power to the drive shaft 36 and converts the remaining power into electric power may be provided.

  In the hybrid vehicle 20 of the embodiment, the power from the engine 22 is output to the drive shaft 36 connected to the drive wheels 38a and 38b via the power distribution and integration mechanism 30, and the power from the motor MG2 is output to the drive shaft 36. However, as illustrated in the hybrid vehicle 320 of the modified example of FIG. 8, the motor MG is attached to the drive shaft 36 connected to the drive wheels 38a and 38b via the transmission 330, and the rotation shaft of the motor MG is used. The engine 22 is connected via the clutch 329, and the power from the engine 22 is output to the drive shaft 36 via the rotation shaft of the motor MG and the transmission 330 and the power from the motor MG is transmitted via the transmission 330. Then, it may be output to the drive shaft 36. Alternatively, as illustrated in the hybrid vehicle 420 of the modified example of FIG. 9, the power from the engine 22 is output to the axle connected to the drive wheels 38a and 38b via the transmission 430 and the power from the motor MG is driven. It may be output to an axle different from the axle to which the wheels 38a, 38b are connected (the axle connected to the wheels 39a, 39b in FIG. 9). That is, an electric vehicle and an engine that includes an engine that outputs motive power, an electric motor that outputs motive power, and a battery that supplies electric power to the electric motor, and that runs only with the motive power from the electric motor while the engine is stopped. Any type of hybrid vehicle may be used as long as it is capable of hybrid traveling using the power from the motor and the power from the electric motor.

  In the embodiment, the present invention has been described as a form of the hybrid vehicle 20, but may be a form of a control method of such a hybrid car.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. In the embodiment, the engine 22 corresponds to the “internal combustion engine”, the motor MG2 corresponds to the “electric motor”, the battery 50 corresponds to the “secondary battery”, and 1 second when the execution EV mode is not set. Select a normal EV mode that travels by electric travel that travels only with the power from the motor MG2 while the operation of the engine 22 is stopped based on the first predetermined condition with a short press of less than When the forced EV mode for running by electric driving is selected based on the second predetermined condition that is easier to establish than the first predetermined condition, and the normal EV mode or the forced EV mode is set to the execution EV mode The EV switch 90 that outputs the EV switch signal ESW that cancels the EV mode setting with a short press of less than 1 second corresponds to the “execution electric travel mode setting instruction means”. When the EV mode is selected, the condition that the cooling water temperature Tw is within the range lower than the range lower limit temperature Twref1 and lower than the range upper limit temperature Twref2, and the motor temperature Tm is higher than the range lower limit temperature Tmref1 and lower than the range upper limit temperature Tmref2. The condition that the inverter temperature Tinv is within the range of the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, the condition that the storage ratio SOC of the battery 50 is greater than or equal to the threshold Sev, the condition that the vehicle speed V is less than the threshold Vref, and the engine 22 The normal EV mode is executed when all of the following conditions are satisfied: is not warming up, power switch signal PSW is not on, heating is not requested, and front defroster switch signal FDSW is off EV switch processing of FIG. 2 to set the EV mode for use The process of steps S140 to S180 is executed, the cooling water temperature Tw is not less than the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2, and the motor temperature Tm is not less than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2. The condition that the inverter temperature Tinv is outside the range of the range lower limit temperature Tiref1 or more and less than the range upper limit temperature Tiref2, the condition that the storage rate SOC of the battery 50 is less than the predetermined storage rate Shv, the vehicle speed V is the threshold value Vref The above conditions, the heating request condition, the power switch signal PSW is turned on, the front defroster switch signal FDSW is turned on, the accelerator opening Acc is greater than or equal to the predetermined opening Aref, The normal EV mode As a condition for canceling, the normal EV mode drive control routine of FIG. 3 in which the electric vehicle travels using only the power from the motor MG2 while the operation of the engine 22 is stopped is executed, and the forced EV mode is selected by the EV switch 90. When the cooling water temperature Tw is within the range of the range lower limit temperature Twref1 or more and less than the range upper limit temperature Twref2, the motor temperature Tm is within the range of the range lower limit temperature Tmref1 or more and less than the range upper limit temperature Tmref2, the inverter temperature Tinv Are all within the range of the range lower limit temperature Tiref1 and lower than the range upper limit temperature Tiref2, the condition that the storage ratio SOC of the battery 50 is greater than or equal to the predetermined storage ratio Sev, and the condition that the front defroster switch signal FDSW is off. Forced EV mode when The EV switch processing routine of steps S190 to S200 of the EV switch processing routine of FIG. 2 set to the row EV mode is executed, and the motor temperature is set so that the cooling water temperature Tw is not less than the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2. The condition that Tm is not less than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, the condition that the inverter temperature Tinv is not less than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, and the storage ratio SOC of the battery 50 is predetermined. The hybrid electronic control unit 70 that executes the forced EV mode drive control routine of FIG. 5 that performs electric traveling on the condition that one of the conditions that become less than the storage ratio Shv is satisfied is a condition that cancels the forced EV mode, and the hybrid Electronic control unit 70 The motor ECU 40 that receives the torque command Tm1 * and the torque command Tm2 * that are transmitted and receives the torque command Tm2 * and controls the motors MG1 and MG2, and the engine ECU 24 that maintains the operation stop state of the engine 22 are the “control means”. Equivalent to. The motor MG1 corresponds to a “generator”, and the power distribution and integration mechanism 30 corresponds to a “planetary gear mechanism”.

  Here, the “internal combustion engine” is not limited to an internal combustion engine that outputs power using a hydrocarbon fuel such as gasoline or light oil, and may be any type of internal combustion engine such as a hydrogen engine. The “motor” is not limited to the motor MG2 configured as a synchronous generator motor, and may be any type of motor that can input and output power, such as an induction motor. The “secondary battery” is not limited to the battery 50 configured as a lithium ion secondary battery, and various secondary batteries such as a nickel hydride secondary battery, a nickel cadmium secondary battery, and a lead storage battery are used. Can do. The “execution electric travel mode setting instruction means” includes the motor MG2 in a state where the operation of the engine 22 is stopped based on the first predetermined condition by a short press of less than 1 second when the execution EV mode is not set. Select the normal EV mode that travels by electric travel that travels only with the power from, and travel by electric travel based on the second predetermined condition that is easier to establish the condition than the first predetermined condition by long pressing for 2 seconds or longer It is not limited to a mode in which the forced EV mode is selected and the EV mode setting is canceled with a short press of less than 1 second when the normal EV mode or the forced EV mode is set to the execution EV mode. According to the first predetermined condition, such as a dial-type switch having three positions, that is, an EV mode release position, a normal EV mode position, and a forced EV mode position. From a plurality of electric driving modes including a plurality of predetermined conditions including a first electric driving mode for driving by electric driving and a second electric driving mode for driving by electric driving under a second predetermined condition different from the first predetermined condition. Any command may be used as long as it gives an instruction to set the electric travel mode according to the operation of the driver as the execution electric travel mode.

  The “control means” is not limited to the combination of the hybrid electronic control unit 70, the engine ECU 24, and the motor ECU 40, and may be configured by a single electronic control unit. Further, as the “control means”, when the normal EV mode is selected by the EV switch 90, the condition that the cooling water temperature Tw is within the range lower than the range upper limit temperature Twref1 and lower than the range upper limit temperature Twref2, the motor temperature Tm is lower than the range lower limit. The condition that the temperature is Tmref1 or more and less than the range upper limit temperature Tmref2, the condition that the inverter temperature Tinv is greater than or equal to the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, and the storage ratio SOC of the battery 50 is greater than or equal to the threshold Sev A condition where the vehicle speed V is less than the threshold Vref, a condition where the engine 22 is not warming up, a condition where the power switch signal PSW is not on, a condition where no heating request is made, a condition where the front defroster switch signal FDSW is off, Normal EV mode when all of Is set to the execution EV mode, and the cooling water temperature Tw is outside the range below the range upper limit temperature Twref2 when the coolant temperature Tw is above the range lower limit temperature Twref1, and the motor temperature Tm is outside the range below the range upper limit temperature Tmref2 above the range lower limit temperature Tmref1. The inverter temperature Tinv is not less than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, the condition that the storage ratio SOC of the battery 50 is less than the predetermined storage ratio Shv, and the vehicle speed V is not less than the threshold Vref. Any one of the following conditions: a condition where a heating request is made, a condition where the power switch signal PSW is turned on, a condition where the front defroster switch signal FDSW is turned on, and a condition where the accelerator opening Acc is equal to or greater than the predetermined opening Aref The condition for canceling the normal EV mode that When the forced EV mode is selected by the EV switch 90, the condition that the cooling water temperature Tw is within the range lower than the range lower limit temperature Twref1 and lower than the range upper limit temperature Twref2 and the motor temperature Tm is within the range lower limit temperature Tmref1. The above conditions are within the range below the range upper limit temperature Tmref2, the inverter temperature Tinv is within the range lower than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, and the storage ratio SOC of the battery 50 is greater than or equal to the predetermined storage ratio Sev. When all of the conditions and the condition that the front defroster switch signal FDSW is OFF are satisfied, the forced EV mode is set to the execution EV mode, and the cooling water temperature Tw is not less than the range lower limit temperature Twref1 and less than the range upper limit temperature Twref2. Outside the range, motor temperature The condition that Tm is not less than the range lower limit temperature Tmref1 and less than the range upper limit temperature Tmref2, the condition that the inverter temperature Tinv is not less than the range lower limit temperature Tiref1 and less than the range upper limit temperature Tiref2, and the storage ratio SOC of the battery 50 is predetermined. The fact that any one of the conditions for lowering the power storage ratio Shv is satisfied is not limited to the condition for canceling the forced EV mode, and is not limited to the condition for performing the electric travel, but three or more using three or more different permission conditions. This instruction is set when an instruction for setting the electric drive mode for execution is given, such as setting the EV mode and performing drive control in each RV mode using three or more different cancel conditions and different drive restrictions. So that the vehicle runs on the electric drive based on the establishment of the predetermined condition in the electric drive mode As long as it controls the combustion engine and an electric motor may be any ones.

  The “generator” is not limited to the motor MG1 configured as a synchronous generator motor, and may be any type of motor as long as it can input and output power, such as an induction motor. . The “planetary gear mechanism” is not limited to the power distribution and integration mechanism 30 of the single pinion 33, but uses a double pinion type planetary gear mechanism or a combination of a plurality of planetary gear mechanisms to connect to four or more shafts. It does not matter as long as what is done.

  The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the same as that of the embodiment described in the column of means for solving the problem. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. That is, the interpretation of the invention described in the column of means for solving the problems should be made based on the description of the column, and the examples are those of the invention described in the column of means for solving the problems. It is only a specific example.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of hybrid vehicles.

  20, 120, 220, 320, 420 Hybrid vehicle, 21 passenger compartment, 21a outlet, 22 engine, 23 temperature sensor, 26 crankshaft, 30 power distribution and integration mechanism, 36 drive shaft, 37 differential gear, 38a, 38b drive wheel , 39a, 39b Wheel, 41, 42 Inverter, 44, 45 Temperature sensor, 50 Battery, 51a Voltage sensor, 51b Current sensor, 51c Temperature sensor, 60 Air conditioner, 62 Refrigeration cycle, 64 Compressor, 65 Inverter, 66 Blower, 67 Operation panel, 67a, 67b switch, 67c Temperature sensor, 68 Air conditioning electronic control unit (air conditioning ECU), 70 Hybrid electronic control unit, 72 CPU, 74 ROM, 76 RAM, 80 Ignition switch 81, 81 shift lever, 82 shift position sensor, 83 accelerator pedal, 84 accelerator pedal position sensor, 85 brake pedal, 86 brake pedal position sensor, 88 vehicle speed sensor, 90 EV switch, 92 power switch, 94 front defroster switch, 230 pairs Rotor motor, 232 inner rotor, 234 outer rotor, 329 clutch, 330, 430 transmission, MG, MG1, MG2 motor.

Claims (11)

A hybrid system comprising an internal combustion engine, an electric motor capable of outputting driving power, and a secondary battery capable of exchanging electric power with the electric motor is mounted. A hybrid vehicle capable of electric traveling that travels only by power, hybrid traveling that travels using the power from the internal combustion engine and the power from the electric motor,
A plurality of predetermined driving modes including a first electric driving mode in which the electric driving is performed in accordance with the first predetermined condition and a second electric driving mode in which the electric driving is performed in accordance with a second predetermined condition different from the first predetermined condition. An execution electric travel mode setting instruction means for giving an instruction to set an electric travel mode according to a driver's operation as an execution electric travel mode from a plurality of electric travel modes consisting of conditions;
Control means for controlling the internal combustion engine and the electric motor to travel in the electric traveling based on establishment of a predetermined condition in the electric traveling mode according to the instruction when an instruction to set the execution electric traveling mode is given; ,
A hybrid car with The hybrid vehicle according to claim 1,
The second predetermined condition is a condition that is easier to establish than the first predetermined condition.
Hybrid car. A hybrid vehicle according to claim 1 or 2,
In the plurality of electric travel modes, a condition for permitting the electric travel mode is a condition in which a storage amount as a power amount that can be discharged from the secondary battery is equal to or more than a first predetermined storage amount, and a temperature of the hybrid system is a predetermined value. A condition that the temperature is within a predetermined temperature range from a lower limit temperature to a predetermined upper limit temperature, a condition that the vehicle speed is less than the predetermined vehicle speed, a condition that a power switch that requires agile dynamic characteristics of the vehicle is not turned on, and the internal combustion engine performs a warm-up operation. Conditions where the accelerator opening is less than the predetermined opening, conditions where the operation of the front defroster for ensuring visibility in the forward direction is not required, and conditions where heating of the passenger compartment is not required The plurality of predetermined conditions are set by a plurality of different combinations including at least one,
Hybrid car. A hybrid vehicle according to any one of claims 1 to 3,
The plurality of electric driving modes include, as conditions for canceling the electric driving mode, the state of a power switch that requires vehicle speed, agile dynamic characteristics of the vehicle, the operating state of an air conditioner that air-conditions the passenger compartment, and power consumption in the passenger compartment. The plurality of predetermined conditions are set by stepwise changing at least one of the operating states of the electrical consumer device.
Hybrid car. A hybrid vehicle according to any one of claims 1 to 4,
The plurality of electric driving modes include, as restrictions imposed during the electric driving, a vehicle speed, a state of a power switch that requires agile dynamic characteristics of the vehicle, an operating state of an air conditioner that air-conditions the passenger compartment, and power consumption in the passenger compartment. The plurality of predetermined conditions are set by stepwise changing at least one of the operating states of the electrical consumer device.
Hybrid car. A hybrid vehicle according to any one of claims 1 to 5,
The execution electric travel mode setting instruction means executes one of the plurality of electric travel modes based on either the number of times of operation of the mode setting switch near the driver's seat or the operation time of the mode setting switch. A means for giving an instruction to set the driving mode.
Hybrid car. A hybrid vehicle according to claim 2,
In the plurality of electric driving modes, a condition that permits the electric driving mode includes a condition that a storage amount as a power amount that can be discharged from the secondary battery is equal to or more than a first predetermined storage amount, and a temperature of the hybrid system is a predetermined lower limit. The condition that the temperature is within a predetermined temperature range from the temperature to the predetermined upper limit temperature, the condition that the vehicle speed is less than the predetermined vehicle speed, the condition that the internal combustion engine is not warming up, the condition that the accelerator opening is less than the predetermined opening, and the forward direction The electric travel mode is permitted when all of a plurality of conditions are satisfied, including a condition that the operation of the front defroster for ensuring the visibility of the passenger is not required and a condition where the passenger compartment is not required to be heated. In addition, as a condition for canceling the electric travel mode, the condition that the temperature of the hybrid system is outside the predetermined temperature range and the charged amount of the secondary battery are A condition that is smaller than the second predetermined charged amount that is smaller than the first predetermined charged amount, a condition that the vehicle speed is equal to or higher than the predetermined vehicle speed, a condition that the accelerator opening is equal to or higher than the predetermined opening, and a condition that the operation of the front defroster is required And a condition that cancels the electric travel mode when one of the conditions that require heating of the passenger compartment is satisfied, and the electric travel mode. As a condition for permitting the condition, the condition that the storage amount of the secondary battery is equal to or greater than the first predetermined storage amount, the condition that the temperature of the hybrid system is within the predetermined temperature range, the condition that the vehicle speed is less than the predetermined vehicle speed, and the When all of a plurality of conditions including the condition where the operation of the front defroster is not required are satisfied, the electric driving mode is permitted and the electric driving mode is set. As conditions for canceling the load, a condition that the temperature of the hybrid system is outside the predetermined temperature range, a condition that the storage amount of the secondary battery is less than the second predetermined storage amount, and a condition that the operation of the front defroster is required And the second electric driving mode in which the second predetermined condition is a condition of canceling the electric driving mode when either of the above is established,
Hybrid car. The hybrid vehicle according to claim 7,
The control means determines that the accelerator opening is the predetermined opening when the accelerator opening is equal to or greater than the predetermined opening when the second electric driving mode is set as the execution electric driving mode. Means for controlling the internal combustion engine and the electric motor to travel;
Hybrid car. The hybrid vehicle according to claim 7 or 8,
When the second electric travel mode is set as the execution electric travel mode, the control means is configured such that an operation state of an air conditioner that air-conditions the passenger compartment and / or an operation state of an electric consumer device that consumes power in the passenger compartment. It is a means for permitting operation within a predetermined operating state range that is less than or equal to predetermined power consumption.
Hybrid car. A hybrid vehicle according to any one of claims 1 to 9,
A generator capable of inputting and outputting power;
A planetary gear mechanism in which three rotating elements are connected to a driving shaft coupled to an axle, an output shaft of the internal combustion engine, and a rotating shaft of the generator;
With
The control means is means for controlling the generator in addition to control of the internal combustion engine and the electric motor.
Hybrid car. A hybrid system comprising an internal combustion engine, an electric motor capable of outputting driving power, and a secondary battery capable of exchanging electric power with the electric motor is mounted. A control method for a hybrid vehicle capable of electric travel that travels only by power, hybrid travel that travels by using power from the internal combustion engine and power from the electric motor,
A plurality of predetermined driving modes including a first electric driving mode in which the electric driving is performed according to the first predetermined condition and a second electric driving mode in which the electric driving is performed according to a second predetermined condition different from the first predetermined condition. An electric driving mode according to a driver's operation is set as an execution electric driving mode from a plurality of electric driving modes consisting of conditions, and the electric driving is executed based on establishment of a predetermined condition in the set execution electric driving mode. Controlling the internal combustion engine and the electric motor to
A control method for a hybrid vehicle.

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