electric vehicles

Abstract

To inhibit sudden changes in behavior of a vehicle.SOLUTION: An electric vehicle includes: a mode selection device in which one travel mode is selected from a plurality of travel modes by an operation of a driver, the travel modes including a motor travel mode, in which a motor is controlled such that required torque required for traveling is output to a drive shaft, and a shift travel mode, in which the motor is controlled such that torque output to the drive shaft based on a shift operation by the driver is simulation torque that simulates torque behavior in an engine vehicle equipped with an engine and a stepped transmission; and a control device that controls the motor such that the electric vehicle travels in the travel mode selected by the mode selection device. The control device prohibits a change in the simulation torque while the electric vehicle is traveling if the shift travel mode is selected.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to electric vehicles. [Background technology]

[0002] Conventionally, electric vehicles of this type have been proposed that include a motor that outputs power to a drive shaft connected to an axle, and a mode selection device that allows the driver to select one of a plurality of drive modes, including a motor drive mode and a variable-speed drive mode (see, for example, Patent Document 1). The motor drive mode is a drive mode that controls the motor so that the torque required for driving is output to the drive shaft. The variable-speed drive mode is a drive mode that controls the motor so that the torque output to the drive shaft based on the driver's shift operation becomes a simulated torque that simulates the torque behavior of an engine vehicle equipped with an engine and a stepped transmission. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-036845 Summary of the Invention [Problem to be solved by the invention]

[0004] In the electric vehicle described above, when the variable speed driving mode is selected, changing the simulated torque allows the vehicle to drive in a manner that simulates the torque behavior of a vehicle with a different engine. However, when changing the simulated torque, the torque output to the drive shaft may fluctuate, causing a sudden change in the vehicle's behavior.

[0005] The electric vehicle of the present invention has a main object to suppress sudden changes in vehicle behavior. [Means for solving the problem]

[0006] The electric vehicle of the present invention employs the following means to achieve the above-mentioned main object.

[0007] The electric vehicle of the present invention comprises: a motor that outputs torque to a drive shaft connected to the axle; a mode selection device that selects one of a plurality of driving modes by an operation of the driver, the driving mode including a motor driving mode that controls the motor so that a required torque required for driving is output to the drive shaft, and a variable speed driving mode that controls the motor so that a torque output to the drive shaft based on a shift operation by the driver becomes a simulated torque that simulates the torque behavior of an engine vehicle equipped with an engine and a stepped transmission; a control device that controls the motor so that the vehicle runs in the running mode selected by the mode selection device; An electric vehicle comprising: The control device prohibits a change in the simulated torque while the vehicle is traveling when the variable speed traveling mode is selected. The gist of this is as follows.

[0008] In the electric vehicle of the present invention, when the variable speed driving mode is selected, changes to the simulated torque are prohibited while the vehicle is traveling. When the simulated torque is changed, the torque output to the drive shaft may fluctuate. If such torque fluctuations occur while the vehicle is traveling, the behavior of the vehicle may suddenly change. However, by prohibiting changes to the simulated torque while the vehicle is traveling, sudden changes in the vehicle's behavior can be suppressed.

[0009] In the electric vehicle of the present invention, the control device may permit the change of the simulated torque when the variable speed traveling mode is selected and the shift position is in the parking range, or may permit the change of the simulated torque when the variable speed traveling mode is selected and the parking brake is applied. In this way, the change of the simulated torque is permitted when the vehicle is reliably stopped, so that the simulated torque can be changed without causing a sudden change in vehicle behavior.

[0010] In addition, the electric vehicle of the present invention may include a display device that displays information, and the control device may display a change acceptance screen on the display device that accepts an instruction to change the simulated torque when the variable speed driving mode is selected, and prohibit acceptance of the change on the change acceptance screen while the vehicle is traveling. This prevents changes from being accepted while the vehicle is traveling, thereby preventing sudden changes in vehicle behavior.

[0011] Furthermore, in the electric vehicle of the present invention, a display device for displaying information may be provided, and the control device may be configured to, when the variable speed traveling mode is selected, display on the display device a change acceptance screen for accepting an instruction to change the behavior of the simulated torque while the vehicle is stopped, but not display the change acceptance screen while the vehicle is traveling. In this way, since changes are not accepted while the vehicle is traveling, sudden changes in vehicle behavior can be suppressed. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram showing the outline of the configuration of an electric vehicle 20 as an embodiment of the present invention. [Figure 2] 4 is a flowchart showing an example of a change permission / denial routine executed by the ECU 50. [Figure 3] 4 is an explanatory diagram showing an example of a change acceptance screen S1 displayed on the display 42. FIG. [Figure 4] 4 is an explanatory diagram showing an example of a manual mode setting screen S2 displayed on the display 42. FIG. [Figure 5] 4 is an explanatory diagram showing an example of an engine characteristic setting screen S3 displayed on the display 42. FIG. [Figure 6] FIG. 10 is an explanatory diagram showing an example of a manual mode setting screen S2 displayed on the display 42 while traveling in a variable speed traveling mode. DETAILED DESCRIPTION OF THE INVENTION

[0013] Next, a mode for carrying out the present invention will be described using examples. [Example]

[0014] 1 is a diagram showing the outline of the configuration of an electric vehicle 20 according to one embodiment of the present invention. As shown in the figure, the electric vehicle 20 of the embodiment includes a driving motor 32, an inverter 34, a battery 36, a display 42, and an electronic control unit (hereinafter referred to as "ECU") 50.

[0015] The motor 32 is configured as a three-phase AC motor and includes a rotor with a permanent magnet embedded in the rotor core and a stator with a three-phase coil wound around the stator core. The rotor of the motor 32 is connected to a drive shaft 26 that is connected to the drive wheels 22 a, 22 b via a differential gear 24. A parking brake 27 is attached to the drive shaft 26.

[0016] The inverter 34 is used to drive the motor 32. The inverter 34 is connected to the battery 36 via a power line 38 and includes six switching elements, namely, transistors T11 to T16, and six diodes D11 to D16 connected in parallel to the six transistors T11 to T16, respectively. The transistors T11 to T16 are arranged in pairs, two at a time, so that one is on the source side and the other is on the sink side of the positive and negative lines of the power line 38. The junctions of the two transistors in each pair are connected to the coils of the corresponding phases (U phase, V phase, W phase) of the motor 32. Therefore, when a voltage is applied to the inverter 34, the ECU 50 adjusts the proportion of the on-time of the paired transistors T11 to T16, thereby generating a rotating magnetic field in the three-phase coils and driving the motor 32 to rotate.

[0017] The battery 36 is configured as a lithium ion secondary battery or a nickel-metal hydride secondary battery, and is connected to the inverter 34 via a power line 38. A smoothing capacitor 39 is attached to the power line 38.

[0018] The display 42 is installed near the driver's seat. The display 42 is configured as a touch panel display device that visually displays various information. The display 42 is controlled by the ECU 50.

[0019] The ECU 50 includes a microcomputer having a CPU, ROM, RAM, flash memory, and input / output ports. The ECU 50 receives inputs of the rotational position θm of the rotor of the motor 32 from a rotational position sensor 32a, the U-phase and V-phase currents Iu and Iv of the motor 32 from current sensors 32u and 32v, the voltage Vb of the battery 36 from a voltage sensor 36a, the current Ib of the battery 36 from a current sensor 36b, and the voltage VL of the power line 38 (capacitor 39) from a voltage sensor 39a. The ECU 50 also receives inputs of a start signal from a start switch 60, a shift position SP representing the operating position of the shift lever 61 from a shift position sensor 62, an accelerator opening Acc representing the depression amount of the accelerator pedal 63 from an accelerator pedal sensor 64, and a brake pedal position BP representing the depression amount of the brake pedal 65 from a brake pedal sensor 66. The ECU 50 also receives inputs of a vehicle speed V from a vehicle speed sensor 67, a switch signal from a mode selector switch 68, and a depression amount Da of the clutch pedal (pseudo clutch pedal) 70 from a clutch pedal sensor 71. The shift lever 61 is configured to simulate a shift device equipped in a vehicle equipped with a manual transmission. The shift lever 61 can select, as a shift position SP, one of multiple shift ranges corresponding to the gear positions of the simulated manual transmission, for example, one of the simulated first to sixth ranges and a neutral range. The mode selector switch 68 outputs a mode switching command to switch between the motor driving mode and the variable-speed driving mode each time it is turned on. The motor driving mode and the variable-speed driving mode will be described later. The parking switch 69 is a switch for placing the shift position SP in the parking range. Each time the parking switch 69 is turned on, the shift position SP is placed in the parking range or released from the parking range. The clutch pedal 70 is configured to simulate a clutch pedal mounted in the simulated engine vehicle. The clutch pedal 70 is configured in the same position and operational feel as the clutch pedal of a vehicle equipped with a manual transmission. The ECU 50 outputs a control signal to the motor 32, a display signal to the display 42, and the like.

[0020] In the electric vehicle 20 of the embodiment, the ECU 50 controls the motor 32 (inverter 34) to run in a motor running mode in which the motor 32 outputs the running torque requirement Td* required for running, or in a variable speed running mode in which the behavior of the torque output from the motor 32 based on the driver's operation of the shift lever 61 is the behavior of the torque in an engine vehicle equipped with an engine and a manual transmission as a stepped transmission.

[0021] In the motor running mode, the running torque requirement Td* required for running (required of the drive shaft 26) is set as the torque command Tm* for the motor 32, regardless of the shift position SP or the depression amount Da of the clutch pedal 70, and transistors T11 to T16 of the inverter 34 are controlled so that the motor 32 is driven by the torque command Tm*. Here, the running torque requirement Td* is set based on the accelerator pedal position Acc and the vehicle speed V. In this way, the motor 32 is controlled so that the running torque requirement Td* required for running is output to the drive shaft 26, and the running torque requirement Td* is output from the motor 32 to run.

[0022] In the variable speed driving mode, a virtual engine speed Ne is set as the engine speed of the simulated internal combustion vehicle using the rotation speed Np of the drive shaft 26 (rotation speed Nm of the motor 32), the gear ratio (speed ratio) r corresponding to the shift position SP, and a slip rate "slip" of the clutch pedal 70 based on the depression amount Da of the clutch pedal 70. A virtual engine output torque Teout output from the engine of the simulated internal combustion vehicle is set based on the accelerator opening Acc and the virtual engine speed Ne. The transmission input torque Tmtin is calculated by multiplying a torque transmission gain k, which is the torque transmission rate from the engine to the manual transmission, by the virtual engine output torque Teout based on the slip rate "slip" of the clutch pedal 70. The torque transmission gain k is set smaller when the depression amount Da of the clutch pedal 70 is large than when it is small, and is set to zero when the depression amount Da of the clutch pedal 70 is the maximum depression amount at which the torque transmission gain k between the engine and the manual transmission becomes zero. Then, the transmission output torque (simulated torque) Tmtout is calculated by multiplying the transmission input torque Tmtin by the gear ratio (speed ratio) r corresponding to the shift position SP, and the transmission output torque Tmtout is set as the torque command Tm* for the motor 32. The transistors T11-T16 of the inverter 34 are controlled so that the motor 32 is driven at the torque command Tm*. In this way, by controlling the motor 32 so that the torque output to the drive shaft 26 based on the driver's operation of the shift lever 61 becomes the transmission output torque (simulated torque) Tmtou that simulates the torque behavior in an engine vehicle equipped with an engine and a stepped transmission, the behavior of the torque output from the motor 32 based on the driver's operation of the shift lever 61 can be made to match the torque behavior in an engine vehicle equipped with an engine and a manual transmission. In other words, it is possible to drive in a manner that simulates driving an engine vehicle equipped with an engine and a manual transmission, and it is possible to create an operating feel similar to that of driving an engine vehicle equipped with an engine and a manual transmission. In addition, in the variable speed running mode, the ECU 50 controls a speaker (not shown) so that a sound (engine sound) linked to the virtual engine rotation speed Ne is output from pre-recorded engine sounds for each engine rotation speed.The sound from these speakers creates a feeling of operation that is just like driving a vehicle equipped with an engine and a manual transmission.

[0023] Next, the operation of the electric vehicle 20 of this embodiment configured as described above will be described, particularly the operation when changing the transmission output torque (simulated torque) Tmtout in the variable speed traveling mode. Figure 2 is a flowchart showing an example of a change permission / denial routine executed by the ECU 50. This routine is executed at predetermined time intervals (for example, every few msec) when the variable speed traveling mode is selected by the mode selector switch 68.

[0024] When this routine is executed, the CPU of the ECU 50 executes a process of displaying a change acceptance screen S1 on the display 42 (step S100). FIG. 3 is an explanatory diagram showing an example of the change acceptance screen S1 displayed on the display 42. The change acceptance screen S1 is a screen for accepting an instruction from the occupant to change the transmission output torque (simulated torque) Tmtout. The change acceptance screen S1 is displayed on the display 42 when the variable speed driving mode is selected. As shown in FIG. 3, the change acceptance screen S1 displays a plurality of buttons that the occupant can select, such as a manual mode setting button B1.

[0025] Next, it is determined whether the vehicle is traveling (step S110). If the vehicle is not traveling, it is determined whether the parking switch 69 has set the shift position SP to the parking range and whether the parking brake 27 is engaged (step S120). If the shift position SP is in the parking range or the parking brake 27 is engaged, a change in the transmission output torque (simulated torque) Tmtout is permitted (step S130), and this routine ends.

[0026] Fig. 4 is an explanatory diagram showing an example of a manual mode setting screen S2 displayed by the display 42. Fig. 5 is an explanatory diagram showing an example of an engine characteristic setting screen S3 displayed by the display 42. When the ECU 50 permits a change in the transmission output torque (simulated torque) Tmtout, if the occupant selects the manual mode setting button B1 on the change acceptance screen S1, the manual mode setting screen S2 shown in Fig. 4 is displayed in place of the change acceptance screen S1. The manual mode setting screen S2 displays an engine setting button B20 for setting the torque characteristics of the engine to be simulated in the variable speed driving mode, a transmission setting button B21 for setting the manual transmission to be simulated, a sound setting button B22 for selecting the engine sound to be simulated, and a set setting button B23 for selecting one vehicle model from a plurality of vehicle models equipped with an engine and a manual transmission.

[0027] When the driver selects the engine setting button B20 on the manual mode setting screen S2, the engine characteristic setting screen S3 shown in FIG. 5 is displayed instead of the manual mode setting screen S2. The engine characteristic setting screen S3 displays a performance display screen S30, which displays an engine performance curve showing torque and output characteristics with the horizontal axis representing engine speed, and input buttons B30, B31, and B32 for inputting the maximum output, maximum torque, and maximum speed for the engine performance curve. When the maximum output, maximum torque, and maximum speed are input using the input buttons Bb0, B31, and B32, the engine performance curve displayed on the performance display screen S30 is changed according to the input values. In the variable-speed driving mode, the performance curve of the simulated engine is displayed on the performance display screen S30, and a virtual engine output torque Teout output from the engine of the simulated internal combustion engine vehicle is set based on the accelerator opening Acc and the virtual engine speed Ne. In this way, the torque characteristics of the engine of the simulated internal combustion engine vehicle can be changed using the screen displayed on the display 42. This allows the transmission output torque (simulated torque) Tmtout to be changed.

[0028] When the driver selects the transmission setting button B21 on the manual mode setting screen S2, a transmission characteristics setting screen (not shown) is displayed in place of the manual mode setting screen S2. The transmission characteristics setting screen displays a performance display screen on which a gear change characteristic curve showing driving force characteristics and engine rotation speed characteristics is displayed with vehicle speed (vehicle speed) on the horizontal axis, and input buttons for inputting the gear ratio of each gear. When the gear change ratio of each gear is input using the input buttons, the gear change ratio of each gear is changed to the input value, and the gear change characteristic curve is changed according to the input value. In the variable speed driving mode, the transmission output torque (simulated torque) Tmtout is calculated as the gear change characteristic curve displayed on the performance display screen of the gear change characteristic curve of the simulated manual transmission. In this way, the transmission characteristics of the engine vehicle to be simulated can be changed using the screen displayed on the display 42. This allows the transmission output torque (simulated torque) Tmtout to be changed.

[0029] When the sound setting button B22 is selected by the driver on the manual mode setting screen S2, a sound setting screen (not shown) is displayed instead of the manual mode setting screen S2. On this sound setting screen, the volume of the engine sound can be changed.

[0030] When the occupant selects the set button B23 on the manual mode setting screen S2, a simulated vehicle setting screen (not shown) is displayed instead of the manual mode setting screen S2. On this simulated vehicle setting screen, the engine vehicle to be simulated in the variable speed driving mode can be changed from an existing vehicle. This allows the transmission output torque (simulated torque) Tmtout to be changed.

[0031] In this way, when the electric vehicle 20 is stopped in the variable speed traveling mode, the shift position SP is in the parking range, or the parking brake 27 is engaged, the transmission output torque (simulated torque) Tmtout and the sound can be changed by permitting the transmission output torque (simulated torque) Tmtout and accepting the change on the change acceptance screen S1. When the shift position SP is in the parking range or the parking brake 27 is engaged, the electric vehicle 20 is reliably stopped, so the changes can be made without causing a sudden change in the vehicle behavior.

[0032] When the electric vehicle 20 is traveling in step S110, or when the electric vehicle 20 is stopped in step S110 but the shift position SP is not in the parking range and the parking brake 27 is not engaged in step S120, changes to the transmission output torque (simulated torque) Tmtout are prohibited (step S140), and the routine ends. In this case, even if the manual mode setting button B1 is selected on the change acceptance screen S1 displayed on the display 41, the display does not change, the display of the change acceptance screen S1 is maintained, and the transmission output torque (simulated torque) Tmtout and the sound cannot be changed. In this way, when the electric vehicle 20 is traveling in the variable speed traveling mode or when the electric vehicle 20 is stopped but the shift position SP is not in the parking range and the parking brake 27 is not engaged, changes to the transmission output torque (simulated torque) Tmtout and changes to the sound are prohibited, thereby suppressing sudden changes in vehicle behavior while the vehicle is traveling or not reliably stopped.

[0033] In the electric vehicle 20 of the embodiment described above, when the variable speed traveling mode is selected, sudden changes in the vehicle behavior can be suppressed by prohibiting changes in the transmission output torque (simulated torque) Tmtout while the vehicle is traveling.

[0034] Furthermore, in the electric vehicle 20 of the embodiment, when the variable speed driving mode is selected, and the vehicle is stopped and the shift position SP is in the parking range or the parking brake 27 is applied, by permitting a change in the transmission output torque (simulated torque) Tmtout, the transmission output torque (simulated torque) Tmtout can be changed without causing a sudden change in the behavior of the vehicle.

[0035] Furthermore, in the electric vehicle 20 of the embodiment, when the variable speed driving mode is selected, a change acceptance screen S1 that accepts instructions to change the transmission output torque (simulated torque) Tmtout is displayed on the display 42, and by prohibiting acceptance on the change acceptance screen S1 while the vehicle is driving, sudden changes in the vehicle behavior can be suppressed.

[0036] In the electric vehicle 20 of the embodiment, when the variable-speed traveling mode is selected, acceptance of changes on the change acceptance screen S1 is prohibited while the vehicle is traveling, thereby prohibiting changes to the transmission output torque (simulated torque) Tmtout. However, when the manual mode setting button B1 is selected on the change acceptance screen S1 displayed on the display 41, a manual mode setting screen S2 is displayed in place of the change acceptance screen S1, and as shown in Fig. 6, on the manual mode setting screen S2, the engine setting button B20, transmission setting button B21, sound setting button B22, and set setting button B23 are grayed out (hatched in the drawing) and each button cannot be selected, thereby prohibiting changes to the transmission output torque (simulated torque) Tmtout.

[0037] In the electric vehicle 20 of the embodiment, when the variable speed driving mode is selected, the change acceptance screen S1 is displayed on the display 42 regardless of whether the vehicle is driving or not, but the change acceptance screen S1 may not be displayed on the display 42 while the vehicle is driving.

[0038] In the electric vehicle 20 of the embodiment, the display 42 is a touch panel display device, and when the variable speed traveling mode is selected, the occupant makes selections on the change acceptance screen S1 and the manual mode setting screen S2, and changes on the engine characteristic setting screen S3, the transmission characteristic setting screen, the sound setting screen, and the simulated vehicle setting screen on the display 42. However, the occupant may make selections on the change acceptance screen S1 and the manual mode setting screen S2, and changes on the engine characteristic setting screen S3, the transmission characteristic setting screen, the sound setting screen, and the simulated vehicle setting screen using a portable terminal that the occupant carries and that can communicate with the ECU 50. In this case, by not accepting instructions from the portable terminal while the vehicle is traveling, changes to the transmission output torque (simulated torque) Tmtout may be prohibited.

[0039] In the electric vehicle 20 of the embodiment, when the variable speed traveling mode is selected, a change in the transmission output torque (simulated torque) Tmtout is permitted when the vehicle is stopped and in the parking range or when the parking brake 27 is applied. However, a change in the transmission output torque (simulated torque) Tmtout may be permitted when the vehicle is in the parking range or when the parking brake 27 is applied, regardless of whether the vehicle is stopped or not, or a change in the transmission output torque (simulated torque) Tmtout may be permitted based on only one of the parking range and the operation of the parking brake 27. Furthermore, a change in the transmission output torque (simulated torque) Tmtout may be permitted when the vehicle is stopped, regardless of the parking range or the operation of the parking brake 27.

[0040] In the electric vehicle 20 of the embodiment, the shift position SP is changed by the driver operating the shift lever 61. However, the present invention can also be applied to a case where two paddle switches are provided near the steering wheel, and the shift position SP is changed by upshifting or downshifting based on paddle signals from the paddle switches.

[0041] The correspondence between the main elements of the embodiment and the main elements of the invention described in the "Means for Solving the Problem" section will be explained below. In the embodiment, the motor 32 corresponds to the "motor," the mode changeover switch 68 corresponds to the "mode selection device," and the ECU 50 corresponds to the "control device."

[0042] The correspondence between the main elements of the Examples and the main elements of the invention described in the "Means for Solving the Problem" section does not limit the elements of the invention described in the "Means for Solving the Problem" section, since the Examples are examples for specifically explaining the mode for implementing the invention described in the "Means for Solving the Problem" section. In other words, the interpretation of the invention described in the "Means for Solving the Problem" section should be based on the description in that section, and the Examples are merely specific examples of the invention described in the "Means for Solving the Problem" section.

[0043] The above describes the form for carrying out the present invention using examples, but the present invention is not limited to these examples in any way, and it goes without saying that the present invention can be carried out in various forms within the scope that does not deviate from the gist of the present invention. [Industrial Applicability]

[0044] The present invention is applicable to the electric vehicle manufacturing industry. [Explanation of symbols]

[0045] 20 Electric vehicle, 22a, 22b Drive wheels, 27 Parking brake, 32 Motor, 34 Inverter, 36 Battery, 42 Display, 50 Electronic control unit (ECU), 68 Mode selector switch, 69 Parking switch.

Claims

1. a motor that outputs torque to a drive shaft connected to the axle; a mode selection device that selects one of a plurality of driving modes by an operation of the driver, the driving mode including a motor driving mode that controls the motor so that a required torque required for driving is output to the drive shaft, and a variable speed driving mode that controls the motor so that a torque output to the drive shaft based on a shift operation by the driver becomes a simulated torque that simulates the torque behavior of an engine vehicle equipped with an engine and a stepped transmission; a control device that controls the motor so that the vehicle runs in the running mode selected by the mode selection device; An electric vehicle comprising: The control device prohibits the change of the simulated torque when the shift position is not in the parking range or when the parking brake is not applied in the variable speed driving mode. Electric car.

2. 2. The electric vehicle according to claim 1, When the variable speed driving mode is selected and the shift position is in the parking range, the control device permits the change of the simulated torque. An electric vehicle equipped with:

3. 2. The electric vehicle according to claim 1, The control device permits the change of the simulated torque when the parking brake is applied in the case where the variable speed traveling mode is selected. An electric vehicle equipped with:

4. 2. The electric vehicle according to claim 1, A display device that displays information Equipped with When the variable speed driving mode is selected, the control device displays a change acceptance screen on the display device for accepting an instruction to change the simulated torque, and prohibits acceptance on the change acceptance screen while the vehicle is driving. Electric car.

5. 2. The electric vehicle according to claim 1, A display device that displays information Equipped with When the variable speed traveling mode is selected, the control device displays, on the display device, a change acceptance screen for accepting an instruction to change the behavior of the simulated torque while the vehicle is stopped, and does not display, on the display device, the change acceptance screen while the vehicle is traveling. Electric car.

6. An electric vehicle according to claim 1, When the variable speed traveling mode is selected, the control device prohibits the change of the simulated torque when the shift position is not in the parking range, or when the parking brake is not applied, or when the shift position is not in the parking range and the parking brake is not applied. Electric car.

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