Electric vehicle internal combustion engine vehicle characteristic virtual implementation device and method

Abstract

The present application relates to a kind of electric vehicle's internal combustion engine vehicle characteristic virtual implementation device and method, its main purpose is to provide a kind of can virtually realize the operation feeling and driving feeling of internal combustion engine, transmission, clutch etc. internal combustion engine drive system in electric vehicle.The electric vehicle's internal combustion engine vehicle characteristic virtual implementation method includes the following steps: the vehicle driving information of electric vehicle is input to controller;Controller determines current vehicle driving mode based on the input vehicle driving information;Controller determines the virtual engine speed based on the determined vehicle driving mode by using vehicle driving information;Controller outputs control signal for virtually demonstrating the internal combustion engine drive system characteristic corresponding to current vehicle driving mode based on the determined virtual engine speed;And according to the control signal output by controller, the operation of virtual demonstration equipment is controlled, to virtually realize the characteristic of internal combustion engine drive system corresponding to current vehicle driving mode.

Description

TECHNICAL FIELD

[0001] The present application relates to an internal combustion engine vehicle characteristic virtual implementation device and method for an electric vehicle, and more particularly, to a method that can virtually implement the operation feeling and driving feeling of an internal combustion engine, a transmission, a clutch, and the like of an internal combustion engine driving system in an electric vehicle. BACKGROUND

[0002] As is well known, an electric vehicle (EV) is a vehicle that travels using a motor.

[0003] The driving system of an electric vehicle includes a battery that supplies electric power used to drive a motor, an inverter connected to the battery to drive and control the motor, a motor that is a driving source of the vehicle and is chargeable / dischargable to the battery through the inverter, and a reducer that reduces the rotational force of the motor and transmits it to a driving wheel.

[0004] Among them, the inverter functions to convert a direct current (DC) current supplied from the battery into an alternating current (AC) current and apply the AC current to the motor through a power cable when the motor is driven, and to convert the AC current generated by the motor functioning as a generator into a DC current and supply it to the battery to charge the battery when the motor is regenerated.

[0005] In addition, unlike existing internal combustion engine vehicles, a conventional electric vehicle does not use a multi-stage transmission, but a reducer using a fixed gear ratio is provided between the motor and the driving wheel.

[0006] This is because, unlike an internal combustion engine (ICE) that can provide high torque only in a range where the distribution of energy efficiency is wide and high speed according to a driving point, the motor has relatively small differences in efficiency with respect to a driving point, and low-speed high-torque can be achieved only by the characteristics of the motor single product.

[0007] In addition, a vehicle equipped with an existing internal combustion engine driving system requires a starting device such as a converter or a clutch due to the characteristics of the internal combustion engine that cannot be driven at low speed, but in the driving system of an electric vehicle, since the motor has the characteristics of being easily driven at low speed, the starting device can be removed.

[0008] Due to such mechanical differences, unlike internal combustion engine vehicles, electric vehicles do not cause a driving discontinuity due to shifting, and are capable of providing smooth drivability.

[0009] However, for drivers who desire driving pleasure, the absence of components such as an internal combustion engine, a transmission, a clutch, and the like can be boring.

[0010] Therefore, an electric vehicle not having an internal combustion engine, a transmission, a clutch, and the like needs a technology that enables a driver to feel the drivability, the fun, the reality, the directness, and the like provided by an internal combustion engine drive system.

[0011] In particular, it is necessary to differentiate an electric vehicle by providing a function that can virtually realize the drivability of an internal combustion engine vehicle so that a driver can experience the drivability that the driver desires in the same vehicle without changing the vehicle. SUMMARY

[0012] (1) Technical problem to be solved

[0013] Therefore, the present application is proposed to solve the above problems, and the object is to provide a method of virtually realizing the characteristics of an internal combustion engine drive system to enable the driver to feel the drivability, the fun, the reality, the directness, and the like provided by an internal combustion engine, a transmission, a clutch, and the like in an electric vehicle.

[0014] In addition, another object of the present application is to provide a method that enables a driver to feel the drivability of an internal combustion engine vehicle in his or her own vehicle without changing the vehicle.

[0015] (2) Technical solution

[0016] To achieve the above object, according to one aspect of the present application, there is provided an internal combustion engine vehicle virtual realization method of an electric vehicle, the method including the steps of: vehicle driving information of the electric vehicle being input to a controller; the controller determining a current vehicle driving mode based on the input vehicle driving information; the controller determining a virtual engine speed based on the determined vehicle driving mode by using the vehicle driving information; the controller outputting a control signal for virtually demonstrating the characteristics of an internal combustion engine drive system corresponding to the current vehicle driving mode based on the determined virtual engine speed; and controlling the operation of a virtual demonstration device according to the control signal output from the controller to virtually demonstrate the characteristics of the internal combustion engine drive system corresponding to the current vehicle driving mode.

[0017] Further, according to another aspect of the present application, there is provided an internal combustion engine vehicle characteristic virtual implementation device for an electric vehicle, the device including: a driving information detection section that detects vehicle driving information in the electric vehicle; a controller configured to input the vehicle driving information detected by the driving information detection section, determine a current vehicle driving mode based on the input vehicle driving information, and determine a virtual engine speed corresponding to the determined vehicle driving mode, and output a control signal for virtually demonstrating a characteristic of an internal combustion engine drive system corresponding to the current vehicle driving mode based on the determined virtual engine speed; and a virtual demonstration device that controls operation in accordance with the control signal output by the controller to virtually implement the characteristic of the internal combustion engine drive system corresponding to the current vehicle driving mode.

[0018] (III) Advantages

[0019] Therefore, according to the internal combustion engine vehicle characteristic virtual implementation device and method for an electric vehicle of the present application, it is possible to virtually implement a characteristic of an internal combustion engine drive system in an electric vehicle that does not have an internal combustion engine (engine), a transmission, a clutch, and the like, and it is possible to provide a driver in the electric vehicle with an operation feeling and a driving feeling as if the driver actually operates an internal combustion engine, a transmission, and a clutch.

[0020] Further, a driver can experience a feeling of driving, a sense of fun, a sense of reality, a sense of directness, and the like provided by an internal combustion engine drive system in his or her own vehicle without having to change the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a block diagram showing a configuration of an internal combustion engine vehicle characteristic virtual implementation device according to the present application.

[0022] Figure 2 is a graph showing virtual engine speeds and vibration demonstration states when a virtual idle mode and a virtual throttle mode in a stop state are implemented in an embodiment according to the present application.

[0023] Figure 3 is a graph showing virtual engine speeds and vibration demonstration states when a virtual clutch slip effect in a start mode and a virtual gear shift feeling in a running mode are implemented in an embodiment according to the present application.

[0024] Figure 4 is a graph showing a transmission plan map for implementing a virtual gear shift feeling in another embodiment according to the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 11: interface section 12: driving information detection section

[0027] 20: first controller 21: torque command generation section

[0028] 22: virtual effect presentation control section 23: final torque command generation section

[0029] 30: second controller 41: drive device (motor)

[0030] 42: speed reducer 43: drive wheel

[0031] 51: amplifier 52: speaker

[0032] 53: combination panel (display device) DETAILED DESCRIPTION

[0033] Hereinafter, embodiments according to the present application will be described in detail with reference to the accompanying drawings, so that those skilled in the art to which the present application pertains can easily practice the present application. However, the present application is not limited to the embodiments described in this specification, and can be embodied in other forms.

[0034] Throughout this specification, when a certain part is described as "including" a certain component, unless otherwise specified, it means that it can further include another component, rather than excluding another component.

[0035] The present application provides a method of virtually implementing characteristics of an internal combustion engine drive system to experience the drivability, fun, reality, directness, etc. provided by the internal combustion engine, transmission, clutch, etc. of the internal combustion engine drive system in an electric vehicle.

[0036] In addition, the present application provides a method of enabling a driver to virtually experience the drivability of an internal combustion engine vehicle in his or her own vehicle without changing the vehicle.

[0037] To this end, the present application discloses an internal combustion engine drive system model simulating an internal combustion engine, transmission, clutch, etc., a motor control device and method for virtually implementing the drivability of an internal combustion engine vehicle in an electric vehicle using the model, and a device and method for displaying visual information and demonstrating sound effects in conjunction with the device.

[0038] In particular, the present application is characterized in that a drive system virtual variable value can be calculated based on an internal combustion engine drive system model, and then a motor torque command capable of providing a virtual driving feeling can be generated based on the calculated drive system virtual variable value, and visual information and sound effects can be displayed in conjunction with the command at the same time.

[0039] Here, the motor is a drive motor that drives a vehicle, and in the following description, unless otherwise specifically defined, the motor refers to a drive motor.

[0040] Further, in the following description, an internal combustion engine and an engine have the same meaning, and this is a technical content that can be easily understood by a person of ordinary skill in the art.

[0041] To provide the driver with the sensibility and drivability of an internal combustion engine (engine) car, the present application virtually generates the operation feeling of the engine, transmission, and clutch, the process of generating the virtual operation feeling includes the process of generating vibration, sound, and visual effects linked to the virtual operation feeling and the process of realizing the virtual shift feeling in the running mode.

[0042] In the present application, the drive system virtual variable can mainly include a virtual engine speed and a virtual gear stage.

[0043] In the present application, the drive system virtual variable can be set independently of the physical state variable of the actual electric vehicle drive system, and can be set based on the state of the virtual internal combustion engine drive system model including the engine and the transmission.

[0044] Further, the drive system virtual variable value is a virtual value in the electric vehicle to which the present application is applied, and in the present application, the drive system virtual variable information can be visually displayed to the driver, can be provided by sound effects to make the driver hear, and can be provided by vibration to make the driver feel.

[0045] Figure 1 is a block diagram showing the configuration of an internal combustion engine vehicle characteristic virtual implementation device according to the present application.

[0046] The internal combustion engine vehicle characteristic virtual implementation device and method according to the present application are a device and method that can virtually implement the operation feeling and driving feeling of an internal combustion engine car in an electric vehicle.

[0047] The internal combustion engine vehicle characteristic virtual implementation device and method according to the present application include a device and method that can generate and implement a virtual shift feeling such as a vehicle equipped with a multi-stage transmission in an electric vehicle.

[0048] As Figure 1 shown in the present application, from the configuration of the device that performs the internal combustion engine vehicle characteristic virtual implementation process, the device that performs the internal combustion engine vehicle characteristic virtual implementation process includes a driving information detection section 12 that detects vehicle driving information, a first controller 20 that generates and outputs a torque command based on the vehicle driving information detected by the driving information detection section 12, and a second controller 30 that controls the operation of the drive device 41 according to the torque command output by the first controller 20.

[0049] In the following description, the control body is divided into a first controller 20 and a second controller 30, but it can also be understood that a plurality of controllers or one integrated control element are collectively referred to as a controller, so that the virtual implementation process according to the internal combustion engine vehicle characteristic virtual implementation process of the present application is performed by the controller.

[0050] In addition, in the present application, the device that performs the virtual implementation process can further include an interface section 11 that the driver uses to select and input one of the on or off of the virtual implementation function including the virtual gear feeling implementation function.

[0051] In the present application, as long as the interface section 11 is a device that the driver can operate the on and off of the virtual implementation function of the vehicle, it can be, for example, an operation device such as a button or a switch provided in the vehicle, and an input device or a touch screen of an ANV (Audio, Video, Navigation) system, etc.

[0052] The interface section 11 can be connected to the first controller 20, and when the driver performs the on or off operation, the on operation signal or the off operation signal in the interface section 11 can be input to the first controller 20.

[0053] Therefore, the first controller 20 can recognize the on, off operation state of the virtual implementation function by the driver.

[0054] In the present application, only when the driver inputs the on of the virtual implementation function through the interface section 11, the virtual implementation function including the virtual gear feeling implementation function is performed.

[0055] In addition, when the interface section 11 is a vehicle input device provided in the vehicle, although not shown in Figure 1 , the driver can perform the on and off operations of the virtual implementation function by a mobile device (not shown) instead of the vehicle input device.

[0056] The mobile device must be communicably connected to the in-vehicle device, such as the first controller, for which an input / output communication interface (not shown) for communication connection between the mobile device and the first controller 20 is used.

[0057] The driving information detection section 12 is a component that detects vehicle driving information required to generate a motor torque command in the vehicle, wherein the vehicle driving information can include driver's driving input information and vehicle state information.

[0058] In the embodiment of the present application, the driving information detecting section 12 can include an acceleration pedal detecting section that detects acceleration pedal input information according to an acceleration pedal operation by the driver, and a brake pedal detecting section that detects brake pedal input information according to a brake pedal operation by the driver.

[0059] The acceleration pedal detecting section can be a conventional acceleration pedal sensor (APS) that is installed on the acceleration pedal and outputs an electric signal according to an acceleration pedal operation state by the driver.

[0060] The brake pedal detecting section can be a conventional brake pedal sensor (BPS) that is installed on the brake pedal and outputs an electric signal according to a brake pedal operation state by the driver.

[0061] In addition, the driving information detecting section 12 can further include a motor speed detecting section for detecting a rotational speed of a motor (hereinafter referred to as "motor speed") that is a driving device 41 for driving the vehicle.

[0062] The motor speed detecting section can be a known rotary transformer that is installed in the motor (driving motor) 41.

[0063] At this time, the driving input information by the driver can include an acceleration pedal input value (APS value) detected by the acceleration pedal detecting section and a brake pedal input value (BPS value) detected by the brake pedal detecting section.

[0064] In addition, the vehicle state information can include the motor speed detected by the motor speed detecting section.

[0065] In addition, in the torque command generating section 21, the driving information for generating the basic torque command can further include a vehicle speed as the vehicle state information, in which case, although Figure 1 not shown in the embodiment, the driving information detecting section 12 can further include a vehicle speed detecting section for detecting a current traveling vehicle speed, which can include a wheel speed sensor installed in a driving wheel of the vehicle.

[0066] In addition, the first controller 20 includes a torque command generating section 21 that generates a basic torque command from vehicle driving information, a virtual effect presentation control section 22 that generates a correction torque command (intervention torque command for virtual effect presentation) for generating and realizing a virtual shift feeling or vibration from the vehicle driving information, and a final torque command generating section 23 that corrects the basic torque command by the correction torque command to generate a corrected final torque command.

[0067] The basic torque command can be a motor torque command determined and generated based on driving information collected while a regular electric vehicle is running, and the torque command generation part 21 can be a vehicle control unit (VCU) or a part thereof that generates a motor torque command based on driving information of a regular electric vehicle.

[0068] In addition, in the present application, the virtual effect demonstration control part 22 is a new component that determines, generates, and outputs an intervention torque command for virtual effect demonstration as a correction torque command separate from the basic torque command and for implementing a virtual gear shift feeling or vibration, and can be attached to a vehicle control unit as a part of the vehicle control unit or provided as a control component separate from the vehicle control unit.

[0069] The final torque command generation part 23 can correct the basic torque command input from the torque command generation part 21 by the correction torque command input from the virtual effect demonstration control part 22, and the final torque command can be calculated by adding the intervention torque command for virtual effect demonstration as the correction torque command to the basic torque command.

[0070] The second controller 30 is a controller that receives the torque command transmitted from the first controller 20, i.e., the final torque command determined by the final torque command generation part 23 of the first controller 20, and controls the operation of the driving device 41.

[0071] In the present application, the driving device 41 can be a motor (driving motor) that drives a vehicle, and the second controller 30 can be a known motor control unit (MCU) that drives the motor through an inverter in a regular electric vehicle and controls the operation of the motor.

[0072] In addition, the virtual implementation device according to the present application can further include a display device that displays real-time virtual engine speed and virtual gear stage information determined by the virtual effect demonstration control part 22, and a sound device that provides a sound effect corresponding to the virtual engine speed value determined by the virtual effect demonstration control part 22.

[0073] The display device is a device provided in a vehicle and displaying real-time information related to virtual implementation of an internal combustion engine vehicle characteristic so that a driver can visually check, and in the present application, any device capable of displaying information can be used without limitation, for example, can be a combination panel 53.

[0074] The sound device is provided in a vehicle to demonstrate a sound effect in conjunction with real-time virtual engine speed information, and can include an amplifier 51 and a speaker 52 for outputting and playing a sound effect.

[0075] Meanwhile, a method for virtually implementing engine vehicle characteristics performed by the device of Figure 1 will be described below.

[0076] In the present application, virtual vibration and gear shift feeling are virtually implemented based on a driving system virtual variable, virtual engine speed and virtual gear stage are displayed in real time by a display device, and sound effects linked to the virtual engine speed are demonstrated, thereby realizing the sensibility of an internal combustion engine driving system in an electric vehicle.

[0077] Here, the driving system virtual variable is a virtual variable virtually set based on the state of an internal combustion engine driving system model, and is a virtual variable for virtually implementing engine vehicle characteristics, and is different from actual input variables such as driver input information and driving state information, etc. vehicle driving information (information detected by a sensor or information determined in an internal control process) in an electric vehicle.

[0078] In addition, in the present application, virtual vibration and gear shift feeling are generated, visual information is displayed, and sound effects are generated, which can be synchronized in time, and can be performed based on virtual variables such as virtual engine speed and virtual gear stage.

[0079] For example, when the virtual engine speed value decreases, according to the decrease amplitude and the decrease time, the value of the virtual engine speed decreasing is displayed as visual information on a tachometer of a cluster 53, and a sound effect in which the pitch (high or low) of an effect sound is demonstrated to decrease acoustically, and at the same time, a vibration effect is demonstrated by a motor torque command that can be synchronized therewith.

[0080] That is, the three elements of generating vibration (including generating gear shift feeling), displaying visual information, and generating sound effects are operated together by using virtual variables of a driving system such as virtual engine speed and virtual gear stage as cues.

[0081] In the present application, the virtual variable does not depend on the existence of a physical engine speed, a motor speed, a wheel speed, and a gear of a transmission that changes an actual gear ratio, and is only a variable for demonstrating the sensibility of an internal combustion engine driving system.

[0082] For example, although there is no mechanism itself for changing a gear in an electric vehicle, in the present application, a virtual gear stage, which is one of the virtual variables, is obtained from vehicle driving information such as driver input information and driving state information, and is displayed on a cluster 53.

[0083] In addition, although there is no engine in an electric vehicle, in the present application, a virtual engine speed value that can change independently of a motor speed is obtained and displayed on a cluster 53.

[0084] In addition, in the present application, the electric vehicle demonstrates the effect sound based on the virtual engine speed value that can be changed independently of the motor speed or the wheel speed, rather than the effect sound corresponding thereto based on the magnitude of the motor speed or the wheel speed.

[0085] On the other hand, various embodiments of demonstrating the vibration effect, the visual effect (displaying visual information), and the sound effect using the driving system virtual variable will be described in detail below.

[0086] In the vehicle start state (key on / start button on), when an on signal of the virtual implementation function is input through the interface unit 11, the following virtual implementation functions are executed.

[0087] The virtual implementation function in the electric vehicle to which the present application is applied is a function of virtually implementing the characteristics of the internal combustion engine driving system corresponding to the current vehicle driving mode based on the vehicle driving information, and can be executed by controlling the operation of the virtual demonstration device according to the control signal of the controller, wherein the virtual demonstration device can include at least one of the motor as the vehicle driving device 41, the combination instrument panel 53 as the display device, and the sound device 51, 52.

[0088] Among them, the current vehicle driving mode can include at least one of an idle mode, a throttle mode, a start mode, and a running mode, and one of the modes of virtually implementing such a vehicle driving mode, i.e., the following virtual idle mode, virtual throttle mode, start mode, and running mode, is executed.

[0089] Virtual idle mode

[0090] The virtual implementation method of the characteristics of the internal combustion engine vehicle according to the present application includes a process of demonstrating the vibration, the visual effect, and the sound effect by changing the virtual engine speed in the vehicle stop state.

[0091] In addition, the process of demonstrating the vibration, the visual effect, and the sound effect by changing the virtual engine speed in the vehicle stop state can include a process for implementing virtual idle sensation and a process for implementing virtual throttle sensation.

[0092] Figure 2 is a graph showing the virtual engine speed and the vibration demonstration state when the virtual idle mode and the virtual throttle mode in the stop state are executed in an embodiment according to the present application.

[0093] The virtual idle mode and the throttle mode are modes of demonstrating the virtual effect in the vehicle stop state assuming that the gear is neutral (N).

[0094] First, according to an embodiment of the present invention, in order to virtually realize the engine idle sensitivity when the vehicle is stopped, the vibration, visual effects and sound effects of the engine idle state in a simulated internal combustion engine (engine) vehicle can be demonstrated. To this end, a virtual idle speed value is preset in the virtual effect demonstration control unit 22.

[0095] The virtual idle speed is a virtual engine speed for virtually achieving a sense of an engine idle (idling) state, and is equivalent to the engine idle speed in a vehicle equipped with the engine.

[0096] The virtual idle speed is a virtual engine speed that simulates a virtual idle state of an engine idle state in an electric vehicle without an engine, and may be a minimum value at which virtual idle sensitivity is felt at the virtual engine speed.

[0097] In the present invention, the feeling of maintaining the engine idle state of a general internal combustion engine vehicle is virtually realized in the electric vehicle, and in the present invention, the virtual idle state is a virtual engine driving state that simulates the engine idle state as described above in the electric vehicle.

[0098] In an embodiment of the present invention, the perception of a vehicle maintaining an engine idle state in a stopped state is virtually realized, and when a vehicle start signal (key on / start button on) and an on signal of the virtually realized function are input, the engine speed can be virtually increased from 0 to the idle speed.

[0099] For this purpose, when a key on / start button on signal and an on signal of a virtual effect function are input, a virtual engine speed curve increasing from 0 to a virtual idle speed is preset in the virtual effect demonstration control portion 22 .

[0100] Thus, the engine speed change in the starting state can be virtually realized, and in order to demonstrate a more realistic virtual starting situation, a virtual engine speed curve of an overshoot situation exceeding the virtual idle speed can be further preset in the virtual effect demonstration control unit 22.

[0101] In the present invention, a virtual engine speed curve for demonstrating a virtual startup situation can be defined as a continuous speed change value over time, and the speed change value increasing from 0 to the virtual idle speed and the speed change value corresponding to the overshoot situation can be set according to time.

[0102] As described above, in the vehicle start state, when the virtual engine speed value is determined to be a value according to the preset speed curve, the virtual effect presentation control section 22 controls the operation of the display device of the vehicle, i.e., the tachometer of the combination panel 53, to visually display the change of the virtual engine speed value with time.

[0103] At this time, the motor as the drive device 41 of the vehicle is controlled to a state in which the vehicle cannot be driven, so that the motor speed is maintained at a speed of the stop state.

[0104] However, while the virtual engine speed is displayed, a virtual vibration effect simulating the vibration at the idling speed of the engine is presented to provide a virtual idling sensibility.

[0105] At this time, the vibration effect simulating the actual engine idling is virtually presented by the motor vibration, and the virtual effect presentation control section 22 applies a vibration torque of a predetermined vibration frequency to the motor 41.

[0106] That is, the virtual effect presentation control section 22 generates a motor torque instruction capable of generating the vibration in the motor 41 to virtually realize the vibration effect at the idling speed, and controls the operation of the motor 41 according to the generated motor torque instruction to generate the engine vibration simulating the engine idling of the internal combustion engine vehicle.

[0107] At this time, the vibration torque instruction, i.e., the motor torque instruction capable of generating the vibration is the intervention torque instruction for the virtual effect presentation, and the basic torque instruction can be 0.

[0108] This also applies to the case where the clutch slip occurs in the throttle mode and the start mode described below.

[0109] At this time, the motor vibration can be a state in which small-amplitude forward and reverse torques are alternately and repeatedly output at a predetermined period and frequency, and can be a motor control state capable of maintaining the vehicle stop state but generating a vibration similar to the engine idling state in the vehicle.

[0110] In the embodiment of the present application, in generating the motor torque instruction for generating the motor vibration, the vibration frequency of the vibration torque can be a value determined according to the virtual engine speed, rather than a constant value.

[0111] For example, the vibration frequency can be linearly proportional to the change of the virtual engine speed, and when the virtual engine speed is 1000 rpm, the vibration frequency need not be a vibration torque of 1000 / 60 Hz.

[0112] However, when a vibration torque of 10 Hz is applied at the virtual engine speed of 1000 rpm, a vibration torque of 20 Hz linearly increased can be applied at the virtual engine speed of 2000 rpm.

[0113] Of course, as described above, when the key on / start button on signal and the on signal of the virtual implementation function are input, the virtual effect demonstration control section 22 virtually demonstrates the initial start condition, and can demonstrate the motor vibration linked with the speed curve value of the virtual engine speed at the time of starting.

[0114] At this time, the motor vibration can be controlled according to the start condition demonstration vibration torque curve set separately from the idle vibration, and thus the virtual vibration effect simulating the start condition of the internal combustion engine automobile can be demonstrated.

[0115] In addition, as described above, a sound having a pitch linked with the virtual idle speed can be generated by the sound device while the vibration effect is demonstrated.

[0116] Thus, the virtual sound effect simulating the engine sound at the time of engine idle can be demonstrated in the virtual idle condition.

[0117] In the embodiment of the present application, the frequency of the sound also does not necessarily have to be absolutely associated with the virtual engine speed value, and like the frequency of the vibration torque, the frequency of the sound can be changed in linear proportion to the change in the virtual engine speed.

[0118] In addition, as described above, when the key on / start button on signal and the on signal of the virtual implementation function are input, the virtual effect demonstration control section 22 can be set to output and demonstrate the sound linked with the speed curve value of the virtual engine speed at the time of starting.

[0119] Virtual throttle mode

[0120] Next, according to the embodiment of the present application, the vibration, visual effect, and sound effect simulating the throttling state in the internal combustion engine (engine) automobile can be demonstrated so as to virtually realize the virtual throttling sensibility in the vehicle stop state (refer to Figure 2 ).

[0121] The virtual throttling mode is a mode in which the condition in which the driver operates the accelerator pedal in the neutral (N) condition of the internal combustion engine automobile is virtually demonstrated.

[0122] For such a virtual throttling mode, the virtual engine speed value for demonstrating the virtual throttling condition is preset in the virtual effect demonstration control section 22.

[0123] At this time, the lower (minimum) value of the virtual engine speed value for demonstrating the virtual throttling condition can be determined as the virtual idle speed.

[0124] The virtual engine speed value for demonstrating the virtual throttle situation can be determined as a value corresponding to the accelerator pedal input value (APS value) of the driver, and the virtual engine speed value can be set to increase as the accelerator pedal input value increases.

[0125] The virtual throttle demonstration virtual engine speed can be determined by the virtual effect demonstration control section 22 from set data that is input in advance from the accelerator pedal input value and stored, which can be a map or a mathematical expression, etc.

[0126] For example, the virtual effect demonstration control section 22 can determine the virtual engine speed at the time of virtual throttle when the vehicle is in a stopped state from a map that takes the accelerator pedal input value as an input variable.

[0127] In addition, the virtual effect demonstration control section 22 can calculate the virtual engine speed at the time of virtual throttle by multiplying the accelerator pedal input value by a scaling factor.

[0128] In addition, the virtual engine speed at the time of virtual throttle determined as described above can be subjected to further post-processing, including rate limit, filtering, and upper limit setting, etc.

[0129] Here, the upper and lower limit values of the rate limit can be set as a function value of the accelerator pedal input value and a function value of the virtual engine speed.

[0130] At the time of filtering, a low pass filter or a lead filter, etc. can be used, and an upper limit can be set by setting a maximum value of the virtual engine speed, so the virtual engine speed set as the upper limit can refer to a speed corresponding to a virtual red zone (refer to Figure 2 “Virtual Red Zone” of FIG. 6).

[0131] When the actual motor speed detected by the motor speed detection section is less than or equal to a preset threshold value that can be considered a stopped state or 0 (zero) in a stopped state, the virtual engine speed or the like virtual variable can be set, and the virtual engine speed setting method when the actual motor speed exceeds the threshold value will be described in detail below.

[0132] As described above, when the virtual engine speed at the time of virtual throttle with the virtual idle speed as the minimum (lower limit) value is determined, the virtual effect demonstration control section 22 controls the operation of the display device of the vehicle, such as the tachometer of the combination instrument panel 53, to display the determined virtual engine speed.

[0133] Of course, as described above, the virtual engine speed at the time when the driver operates the throttle of the accelerator pedal in the vehicle stop state is determined as a value according to the accelerator pedal input value of the driver, and the virtual engine speed value displayed on the combination panel 53 is increased each time the driver operates the accelerator pedal with the virtual idle speed as the minimum value.

[0134] However, at this time, the actual motor speed is the same stop state speed as at the time of the virtual idle.

[0135] As described above, at the time of the throttle, while the virtual engine speed is displayed in real time by the combination panel 53, the virtual effect demonstration control section 22 demonstrates the virtual vibration effect simulating the vibration at the time of the actual throttle, like at the time of the virtual idle, to provide the virtual throttle feeling.

[0136] At this time, the vibration effect similar to the vibration at the time of the actual internal combustion engine vehicle throttle is virtually demonstrated in the vehicle by the motor vibration, and the virtual effect demonstration control section 22 applies a vibration torque of a predetermined vibration frequency to the motor 41.

[0137] That is, the virtual effect demonstration control section 22 generates a motor torque command (intervention torque command for virtual effect demonstration) that can generate a vibration in the motor 41 to virtually realize the vibration effect at the time of the throttle, and controls the operation of the motor 41 according to the generated motor torque command, thereby generating a motor vibration simulating the engine vibration at the time of the throttle of the internal combustion engine vehicle.

[0138] At this time, the motor vibration can be a state in which the forward torque and the reverse torque are alternately and repeatedly output at a predetermined cycle, and can be a motor control state capable of generating a vibration in the vehicle at a level similar to the time of the throttle of the actual internal combustion engine vehicle.

[0139] In the embodiment of the present application, when the motor torque command for generating the motor vibration is generated, like at the time of the virtual idle, the vibration frequency of the vibration torque can be a value determined according to the virtual engine speed, rather than a constant value, for example, the vibration frequency can be linearly proportional to the change in the virtual engine speed.

[0140] In addition, when the virtual engine speed reaches an approximate level below a preset upper limit value or a set difference value of the upper limit value, a vibration torque for simulating a virtual fuel cut can be applied to the motor 41.

[0141] In the case of the vibration at the time of the virtual fuel cut, the virtual effect demonstration control section 22 generates a motor torque command capable of generating a vibration in the motor 41 to virtually realize the vibration effect, and controls the operation of the motor 41 according to the generated motor torque command, generating a motor vibration simulating the engine vibration at the time of the fuel cut of the internal combustion engine vehicle (refer to Figure 2 ).

[0142] At this time, the magnitude or period of the vibration torque can be set to a value different from that of the vibration torque at the virtual idle.

[0143] In addition, as described above, while the vibration effect is demonstrated, a sound having a pitch linked to the virtual engine speed at the virtual throttle can be generated by the sound device.

[0144] Thus, a virtual sound effect simulating the engine sound at the throttle of the internal combustion engine vehicle can be demonstrated in the virtual throttle case.

[0145] In the embodiment of the present application, as with the frequency of the vibration torque, the frequency of the sound is not necessarily absolutely linked to the virtual engine speed value, but the frequency of the sound can be changed in linear proportion to the change in the virtual engine speed.

[0146] Launching mode

[0147] Meanwhile, the internal combustion engine vehicle characteristic virtual implementation method according to the present application includes a process of changing the virtual engine speed to demonstrate a virtual clutch slip effect at the time of vehicle launch.

[0148] Referring to Figure 3 The launch mode is described.

[0149] In the internal combustion engine vehicle, when the gear is in the drive range (D range) state and the driver simultaneously depresses the brake pedal and the accelerator pedal, the clutch slips, and then, when the driver moves the foot from the brake pedal, the vehicle is launched.

[0150] The launch mode of the present application virtually implements such launch and clutch slip cases.

[0151] The above-described virtual idle or virtual throttle sensibility is implemented when in a stop state in which the actual motor speed detected by the motor speed detection section is less than or equal to a preset threshold value or 0 (zero), at this time, the virtual engine speed is determined according to the accelerator pedal input value (APS value) of the driver.

[0152] On the other hand, when in a stop state in which the actual motor speed is less than or equal to a threshold value or 0 in a state in which the brake pedal is depressed and the accelerator pedal is depressed, the clutch slip occurs, then, when the actual motor speed exceeds the threshold value, the vehicle is launched, and in the launch mode including the clutch slip case, the virtual engine speed is determined from the actual motor speed.

[0153] Specifically, when in a state where the vehicle is started, the virtual engine speed can be determined as a value obtained by multiplying the virtual gear ratio corresponding to the current virtual gear position (virtual current gear position) determined through the virtual transmission model by the actual motor speed.

[0154] However, when in a state where the driver simultaneously depresses the accelerator pedal and the brake pedal, i.e., when the clutch slips, the actual motor speed is less than or equal to a threshold value or 0, at this time, the clutch slips in the internal combustion engine drive system, and thus in the present application, the virtual clutch slip effect at the start of the start is achieved by simulating the clutch slip.

[0155] During the demonstration of the virtual clutch slip effect when the vehicle is started, the virtual engine speed can be calculated from the actual motor speed and the accelerator pedal input value (APS), rather than only from the actual motor speed.

[0156] At this time, a value obtained by multiplying the actual motor speed by the virtual gear ratio corresponding to the virtual current gear position can be calculated, and the virtual engine speed can be calculated by further adding the virtual clutch slip speed.

[0157] Here, when the virtual clutch slip effect needs to be demonstrated when the vehicle is started, the virtual gear position is 1st gear, and thus the virtual gear ratio is a gear ratio set when the virtual gear position is 1st gear.

[0158] The controller, i.e., the virtual effect demonstration control part 22 of the first controller 20, can calculate the virtual clutch slip speed from the accelerator pedal input value, at this time, the virtual clutch slip speed based on the accelerator pedal input value can be calculated using a map or a mathematical expression, etc., or using an internal combustion engine drive system model.

[0159] For example, in the case of using the internal combustion engine drive system model, when the virtual torque is calculated using a function of the accelerator pedal input value in the model, the virtual clutch slip speed can be calculated using a function of the calculated virtual torque.

[0160] As described above, the virtual engine speed at the start of the vehicle is information obtained in real time from the motor speed, which is the actual drive system speed of the electric vehicle, and during the clutch slip at the start of the vehicle, is obtained in real time from the actual motor speed and the accelerator pedal input value.

[0161] At this time, the virtual engine speed obtained using a function of the actual motor speed rather than the virtual engine speed obtained using a function of the accelerator pedal input value can have a discontinuity point, and in order to solve this problem, the virtual engine speed can be finally determined through post-processing such as a pre-set rate limit or filtering.

[0162] In addition, when the threshold value of the actual motor speed is set in the virtual effect presentation control section 22, the threshold value can be a predetermined constant value, but can also be set as a variable value linked to the virtual engine speed determined using a function of the accelerator pedal input value (APS value).

[0163] The virtual engine speed at the time of vehicle start obtained as described above includes two components, which are ① a virtual engine speed component linked to the actual motor speed and ② a component exceeding the virtual engine speed component linked to the actual motor speed.

[0164] Here, the component exceeding the virtual engine speed component can be referred to as a virtual clutch slip amount, and corresponds to the virtual clutch slip speed described above.

[0165] The above-mentioned rate limiting and filtering and the like post-processing can be applied to the ① and ② individually or selectively.

[0166] In addition, regardless of whether the actual motor speed is less than or equal to the threshold value or exceeds the threshold value, when the virtual engine speed reaches an approximate level of a preset upper limit value or a set difference value below the upper limit value, a vibration torque for simulating a virtual fuel cut can be applied to the motor.

[0167] As described in the virtual throttle feeling realization method, for the vibration at the time of virtual fuel cut, the virtual effect presentation control section 22 generates a motor torque command capable of generating a vibration in the motor to virtually realize a vibration effect, and controls the operation of the motor in accordance with the generated motor torque command to generate a motor vibration simulating an engine vibration at the time of fuel cut in a gasoline automobile.

[0168] At this time, the magnitude or period of the vibration torque can be set as a value different from the vibration torque at the time of virtual idling, the time of virtual throttle, or the time of presenting a virtual clutch slip effect.

[0169] In addition, as described above, when the final virtual engine speed for presenting a virtual clutch slip effect is determined, the virtual effect presentation control section 22 controls the operation of a display device of the vehicle, such as a tachometer of a combination instrument panel 53, to display the determined virtual engine speed in real time.

[0170] Meanwhile, the virtual effect presentation control section 22 presents a virtual vibration effect simulating a vibration at the time of vehicle start and clutch slip.

[0171] At this time, a vibration effect similar to that at the time of actual clutch slip is virtually presented in the vehicle by motor vibration, and the virtual effect presentation control section 22 applies a vibration torque of a predetermined vibration frequency to the motor.

[0172] That is, the virtual effect demonstration control section 22 generates a motor torque instruction capable of generating a vibration in the motor to virtually realize a vibration effect at the time of virtual clutch slip, and controls the operation of the motor in accordance with the generated motor torque instruction to generate a motor vibration simulating a vibration at the time of clutch slip of an internal combustion engine automobile.

[0173] At this time, the motor vibration can be a state in which a forward torque and a reverse torque are alternately and repeatedly output in a short period, and can be a motor control state capable of generating a vibration in the vehicle at a level similar to that at the time of clutch slip.

[0174] When the motor instruction for generating the motor vibration is generated, even when the virtual clutch slip effect is demonstrated, the vibration frequency of the vibration torque can be changed in linear proportion to the change in the virtual engine speed, as in the case of the virtual throttle.

[0175] In addition, even when the virtual clutch slip effect is demonstrated, the virtual effect demonstration control section 22 generates a sound having a pitch linked to the virtual engine speed through a sound device while the vibration effect is demonstrated, as in the case of the virtual throttle.

[0176] Next, the virtual implementation method of the characteristics of the internal combustion engine vehicle according to the present application includes a process of demonstrating a vibration and a sound effect simulating an internal combustion engine drive system through motor torque control while the vehicle is running.

[0177] The controller, that is, the virtual effect demonstration control section 22 of the first controller calculates the virtual engine speed in real time in the same method as when the clutch slip effect is demonstrated during the running of the vehicle in which the actual motor speed exceeds the threshold value.

[0178] At this time, the virtual engine speed is determined by the actual motor speed detected by the motor speed detection section, and more specifically, the virtual engine speed can be determined as a value obtained by multiplying a virtual gear ratio corresponding to the current virtual gear position by the actual motor speed.

[0179] And, when the final virtual engine speed is determined through post-processing in the same manner as when the virtual clutch slip effect is demonstrated, the virtual effect demonstration control section 22 controls the operation of a display device of the vehicle, such as a speedometer of a combination instrument panel, to display the determined virtual engine speed in real time.

[0180] Meanwhile, the controller, that is, the virtual effect demonstration control section 22 of the first controller determines a virtual effect demonstration intervention torque instruction for simulating a characteristic vibration of an internal combustion engine drive system generated in a vehicle equipped with an engine, a transmission, and a clutch during the running of the vehicle.

[0181] Next, the controller determines and generates a final motor torque command by adding the determined intervention torque command for the virtual effect presentation to a regular motor torque command (base torque command) for motor control.

[0182] As a result, the controller controls the operation of the motor in accordance with the final motor torque command, and thus it is possible to virtually realize the sensibility of the internal combustion engine drive system during driving of the electric vehicle.

[0183] In addition to the idle vibration described above, the characteristic vibration can include all clutch stick-slip vibration, virtual gear shift feeling, acceleration feeling generated when the turbocharger is boosted, and vibration occurring due to deformation of the rotation shaft of the transmission, etc.

[0184] In addition, the controller, i.e., the virtual effect presentation control section 22 of the first controller 20 can use the final motor torque command, the actually measured actual motor torque, the base torque command, or the intervention torque command for virtual effect presentation, or use one of the post-processed values, values calculated based on one or more of them, or values obtained by selective combination thereof, to adjust the pitch, volume, and equalizer of the sound, etc.

[0185] For example, when the intervention command for virtual effect presentation is applied, the pitch of the virtual engine sound can be further increased compared to the case where the intervention command for virtual effect presentation is not applied.

[0186] Alternatively, as the final motor torque command or the actual motor torque increases, the volume of the virtual engine sound can be further increased.

[0187] Alternatively, as the base torque command value decreases, the bass gain of the engine sound can be made to a larger value, or as the base torque command value increases, the treble gain of the engine sound can be made to a larger value.

[0188] In addition, preferably, when presenting the sound effect, various sound pitches are mixed, and the range of mixed sound pitches can be adjusted in accordance with the hourly change amount of one of the torque commands.

[0189] Reference Figure 4 It can be seen that the virtual gear shift (VGS) function, i.e., the virtual gear shift feeling, can be realized in the driving mode after the vehicle is started, and the virtual current gear and the virtual target gear when the virtual gear shift feeling is realized are shown.

[0190] Here, the following will describe the virtual gear shift feeling realization process.

[0191] The virtual shift feeling can be formed by simulating the behavior and movement of the vehicle that the driver can feel during the shift of the multi-stage transmission, and in the implementation process, the virtual shift feeling is generated and implemented by the control of the motor (drive motor).

[0192] To achieve the virtual shift feeling, an internal combustion engine drive system model simulating the internal combustion engine and the transmission, etc. is provided in the virtual effect demonstration control part 22, and since a shift event occurs in the virtual transmission model in the internal combustion engine drive system model, virtual shift torque intervention can be performed, at this time, the virtual shift intervention torque (virtual effect demonstration intervention torque at virtual shift) can be demonstrated in the form of motor torque instruction.

[0193] That is, when a shift event occurs, the virtual shift feeling is generated and implemented by the motor torque control, and the motor torque instruction is corrected to generate and implement the virtual shift feeling, at this time, the correction torque for correcting the motor torque instruction is the virtual shift intervention torque.

[0194] In the control process for generating the virtual shift feeling of the electric vehicle, the controller (which can be a virtual effect demonstration control part) can determine the occurrence of a shift event from the virtual vehicle speed and the accelerator pedal input value (APS value) (or vehicle load) using a preset shift schedule map, and can determine the virtual target gear.

[0195] Here, the virtual vehicle speed can be calculated as a value proportional to the actual motor speed by using the actual motor speed and the virtual final reduction gear ratio, and the virtual final reduction gear ratio is a value preset in the virtual effect demonstration control part 22.

[0196] In addition, the gear level is determined from the virtual current gear and the determined virtual target gear by the controller, and the virtual shift intervention torque curve corresponding to the determined current gear level is selected from the virtual shift intervention torque curve of the preset gear level.

[0197] Here, the virtual shift intervention torque curve is a torque curve in which the virtual shift intervention torque value is preset according to the shift progress rate, for example, the shift progress rate can be determined as a percentage (%) of the counted time for the preset total shift time, and the shift progress rate can increase to 100%.

[0198] The shift stages can be classified as power-on upshift, power-off upshift (lift-off), power-on downshift (kick-down), power-off downshift, near-stop downshift, etc.

[0199] To calculate the virtual shift intervention torque, the controller judges the current shift stage, and its judging method is upshift when the virtual target shift stage is higher than the virtual current shift stage (i.e., virtual target shift stage > virtual current shift stage), and conversely, downshift when the virtual target shift stage is lower than the virtual current shift stage (i.e., virtual target shift stage < virtual current shift stage).

[0200] In addition, power-on when the basic torque command (motor torque command) is greater than a preset reference torque value, and conversely, power-off when the basic torque command (motor torque command) is less than the preset reference torque value.

[0201] Figure 4 is an example graph showing a shift schedule map for implementing virtual shift feeling in another embodiment according to the present application, and illustrates an upshift use shift schedule map and a downshift use shift schedule map.

[0202] Next, the virtual shift intervention torque for generating virtual shift feeling is determined in real time by the controller according to the selected virtual shift intervention torque curve, and the motor torque command (basic torque command) is corrected by using the virtual shift intervention torque, whereby the final motor torque command is determined.

[0203] At this time, the torque correction can be performed by adding the virtual shift intervention torque to the motor torque command.

[0204] As described above, when the final motor torque command is generated, the controller controls the operation of the motor for driving the vehicle according to the generated final motor torque command to generate virtual shift feeling generated by the motor.

[0205] In addition, when the virtual shift intervention torque is determined every time a shift event occurs, the motor torque command is corrected using the determined virtual shift intervention torque, and the operation of the motor is controlled according to the corrected motor torque command to generate virtual shift feeling.

[0206] As described above, the control process for generating and implementing the virtual gearshift feeling has been described, and during vehicle running, the virtual effect demonstration control section 22 can determine a virtual engine speed as a value obtained by multiplying a virtual gear ratio of a virtual current gear determined by the virtual transmission model by an actual motor speed, and can control to display the determined virtual engine speed and virtual current gear stage in real time on a tachometer of the combination panel 53.

[0207] Although the embodiments of the present application have been described in detail above, the scope of the right of the present application is not limited to this, and the scope of the right of the present application includes various modifications and improvements made by those skilled in the art using the basic concept of the present application defined in the appended claims.

Claims

1. A method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle, comprising the following steps: Vehicle driving information of the electric vehicle is input to the controller; The controller determines a current vehicle driving mode based on the input vehicle driving information; a controller determining a virtual engine speed based on the determined vehicle driving mode by using the vehicle driving information; The controller outputs a control signal for virtually demonstrating a characteristic of an internal combustion engine drive system corresponding to a current vehicle driving mode based on the determined virtual engine speed; as well as controlling the operation of the virtual demonstration device according to the control signal output by the controller to virtually demonstrate the characteristics of the internal combustion engine drive system corresponding to the current vehicle driving mode, The virtual engine speed corresponding to the virtual clutch slip state is determined as a value obtained by multiplying the detected drive motor speed by the set virtual gear ratio and adding the virtual clutch slip speed determined based on the value detected according to the accelerator pedal input value.

2. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 1, characterized in that: The vehicle driving mode includes at least one of an idle mode, a throttle mode, a start mode and a driving mode.

3. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 2, characterized in that: The vehicle driving information includes: an accelerator pedal input value detected by an accelerator pedal detection unit; a brake pedal input value detected by a brake pedal detection portion; and At least one of the speeds of the drive motor detected by the motor speed detection unit.

4. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 3, characterized in that: In the step of determining the virtual engine speed, when the current vehicle driving mode is determined to be an idle mode in a vehicle stop state, the controller determines a preset virtual idle speed as the virtual engine speed.

5. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 4, characterized in that: In the step of determining the virtual engine speed, the controller determines the virtual engine speed according to a virtual engine speed curve set to change from 0 to the virtual idle speed in a start-up situation in which a vehicle start signal is input.

6. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 3, characterized in that: In the step of determining the virtual engine speed, when the current vehicle driving mode is determined to be a throttle mode in which the driver operates an accelerator pedal in a vehicle stop state, the controller determines the virtual engine speed to be a value according to an accelerator pedal input value in the vehicle driving information.

7. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 3, characterized in that: In the step of determining the virtual engine speed, when the current vehicle driving mode is determined to be a start mode and it is judged based on the accelerator pedal input value and the brake pedal input value that the driver is operating the brake pedal and the accelerator pedal at the same time, the controller determines the virtual engine speed corresponding to the virtual clutch slip state.

8. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 7, characterized in that: In the controller, a virtual engine speed corresponding to the virtual clutch slip state is determined based on the speed of the driving motor detected by the motor speed detecting portion, a preset virtual gear ratio of the transmission, and an accelerator pedal input value detected by the accelerator pedal detecting portion.

9. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 7, characterized in that: When the driver's brake pedal operation is released in the virtual clutch slip state of the starting mode, the controller determines a virtual engine speed based on the detected speed of the drive motor and a virtual gear ratio corresponding to a current virtual gear determined by a virtual transmission model based on vehicle driving information.

10. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 3, characterized in that: In the step of determining the virtual engine speed, when the current vehicle driving mode is determined to be the traveling mode, the controller determines the virtual engine speed based on the detected speed of the drive motor and the virtual gear ratio corresponding to the current virtual gear determined by the virtual transmission model based on vehicle driving information.

11. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 10, characterized in that: When the current vehicle driving mode is determined to be a travel mode, the controller determines a virtual engine speed as a value obtained by multiplying the detected speed of the drive motor by a virtual gear ratio corresponding to the current virtual gear position.

12. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 10, characterized in that: The virtual demonstration device is a vehicle drive motor that outputs a vibration torque simulating the vibration of the internal combustion engine drive system according to the control signal of the controller. When the current vehicle driving mode is determined to be one of the throttle mode, the start mode and the travel mode and the virtual engine speed reaches a preset upper limit value or a speed below a set difference of the upper limit value, the controller outputs a control signal for controlling the drive motor and demonstrates virtual fuel cut-off vibration to output a preset vibration torque corresponding to the virtual fuel cut-off.

13. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 1, characterized in that: The virtual demonstration device is a vehicle drive motor that outputs a vibration torque simulating the vibration of the internal combustion engine drive system according to the control signal of the controller. The controller determines and uses a vibration frequency of the vibration torque that varies according to a virtual speed of the engine, The controller outputs a control signal for outputting a vibration torque of the vibration frequency.

14. The method for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 1, characterized in that: The virtual demonstration device is a vehicle sound device that outputs a sound simulating a sound generated from an internal combustion engine drive system according to a control signal of the controller, The controller determines and uses one or both of a frequency and a pitch of a sound linked to a virtual speed of the engine, The controller outputs a control signal for outputting a sound of one or both of the frequency and the pitch.

15. A device for virtualizing the internal combustion engine characteristics of an electric vehicle, comprising: A driving information detection unit, detecting vehicle driving information in an electric vehicle; a controller configured to input the vehicle driving information detected by the driving information detection unit, determine a current vehicle driving mode based on the input vehicle driving information, determine a virtual engine speed corresponding to the determined vehicle driving mode, and output a control signal for virtually demonstrating a characteristic of an internal combustion engine drive system corresponding to the current vehicle driving mode based on the determined virtual engine speed; as well as a virtual demonstration device that controls operation according to the control signal output by the controller to virtually realize the characteristics of the internal combustion engine drive system corresponding to the current vehicle driving mode, The controller is further configured such that a virtual engine speed corresponding to a virtual clutch slip state is determined as a value obtained by multiplying a detected speed of a driving motor by a set virtual gear ratio and adding a virtual clutch slip speed determined based on a value according to a detected accelerator pedal input value.

16. The device for virtual realization of internal combustion engine vehicle characteristics of electric vehicle according to claim 15, characterized in that: The driving information detection unit includes at least one of the following: an accelerator pedal detection unit, detecting an accelerator pedal input value of a driver; a brake pedal detection unit that detects a driver's brake pedal input value; and The motor speed detection unit detects the speed of a drive motor that drives the vehicle.

17. The device for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 15, characterized in that: The virtual demonstration device is a vehicle driving motor that outputs a vibration torque simulating the vibration of the internal combustion engine driving system according to the control signal of the controller. The controller determines and uses a vibration frequency of the vibration torque that varies according to a virtual speed of the engine, The controller outputs a control signal for outputting a vibration torque of the vibration frequency.

18. The device for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 15, characterized in that: The virtual demonstration device outputs a sound device of a vehicle that simulates a sound generated from an internal combustion engine drive system according to a control signal of the controller, The controller determines and uses one or both of a frequency and a pitch of a sound linked to a virtual speed of the engine, The controller outputs a control signal for outputting a sound of one or both of the frequency and the pitch.

19. The device for virtual realization of internal combustion engine vehicle characteristics of an electric vehicle according to claim 15, characterized in that: The virtual demonstration device is a display device that displays a virtual engine speed.

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