KR20200143962A - Apparatus and mehtod for outputting virtual engine sound and vibration - Google Patents

Abstract

The present invention relates to a device for outputting virtual engine sound and vibration, and a method therefor. The device comprises: an engine controller controlling an idling state of an engine during driving; a speaker generating sound and vibration of the engine; and an amplifier playing the sound and the vibration of the engine in accordance with the idling state to be output through the speaker.

Description

Virtual engine sound and vibration output device and method {APPARATUS AND MEHTOD FOR OUTPUTTING VIRTUAL ENGINE SOUND AND VIBRATION}

The present invention relates to a virtual engine sound and vibration output device and method.

Idle Stop & Go (ISG) automatically stops the engine when it stops for a certain time due to waiting for a signal, and limits engine idle by turning on the engine again when the vehicle starts again. In a vehicle equipped with such an idle limiting device, engine noise and engine vibration disappear when the engine is stopped when the vehicle is stopped, and engine noise and engine vibration are generated again when the engine starts again when restarting. As the vehicle stops due to waiting for a signal, etc., and restarts frequently occur while the vehicle is running, engine stop (engine auto-off) and restart are repeated, resulting in the disappearance and repetition of engine noise and engine vibration, making the driver and passengers uneasy. can do. For example, when the vehicle is stopped for a signal and the engine is turned off, a passenger sleeping in the vehicle may be mistaken as arriving at the destination and wake up, which may cause inconvenience.

The present invention provides engine sound and vibration identical to engine noise and engine vibration by using an in-vehicle speaker in order to offset a sense of heterogeneity caused by repeated generation and disappearance of engine noise and engine vibration due to the engine stop and start repeatedly due to the idle rotation limiting device. An artificially generated virtual engine sound and vibration output apparatus and method are provided.

In order to solve the above problems, a virtual engine sound and vibration output device according to an embodiment of the present invention includes an engine controller that controls an idle state of the engine while driving, a speaker that generates engine sound and vibration, and the idle state. And an amplifier for reproducing the engine sound and vibration and outputting it to the speaker.

The amplifier may obtain an engine speed from the engine controller when the idle state is an idle stop state, and output engine sound and vibration mapped to the obtained engine speed to the speaker.

The virtual engine sound and vibration output device further includes a temperature sensor that measures an outside temperature of the vehicle, and the amplifier corrects the engine sound and vibration in consideration of the outside temperature.

Further comprising a microphone that receives engine sound output through the speaker and feeds it back to the amplifier, wherein the amplifier analyzes the vibration fed back by the acceleration sensor so that the vibration generated through the speaker stops at idle time of the engine. When the vibration is generated more delayed, the timing of outputting the vibration is advanced by a delay time than before.

The amplifier analyzes the feedback feedback, and when the vibration generated through the speaker is generated earlier than the idle stop time of the engine, the amplifier determines the difference between the output time of the vibration output through the speaker and the idle stop time of the engine. It is characterized in that the timing of the vibration output through the speaker is delayed than before.

The virtual engine sound and vibration output device further includes an acceleration sensor for measuring vehicle vibration due to vibration generated through the speaker, and the amplifier corrects the output of the vibration by analyzing the vibration fed back by the acceleration sensor. Characterized in that.

The amplifier is characterized in that when the idle state is a restart state, the engine starting sound is output to the speaker to cancel the engine starting noise.

Meanwhile, a method of outputting a virtual engine sound and vibration according to an embodiment of the present invention includes checking an idle state of an engine while driving, and outputting an engine sound and vibration through a speaker according to the idle state.

The outputting of the engine sound and vibration may include obtaining at least one of an engine speed and an outside temperature, and outputting an engine sound and vibration mapped to the obtained information when the idle state is an idle stop state. It characterized in that it comprises a step.

After the step of outputting the engine sound and vibration, receiving feedback of the engine sound and vibration output through the speaker, and analyzing the feedback sound and vibration to correct the output of the engine sound and vibration characterized by further comprising To do.

In the step of compensating the output of the engine sound and vibration, if the engine sound and vibration output through the speaker is delayed from the idle stop time of the engine, the output time of the engine sound and vibration is advanced by a delay time than before. It is characterized in that.

In the step of correcting the output of the engine sound and vibration, when the engine sound and vibration output through the speaker are generated before the engine idle stop, the difference between the engine sound and the vibration output time and the engine idle stop time It is characterized in that the timing of outputting the engine sound and vibration is delayed than before.

After the step of checking the idling state, if the idling state is a restart state, acquiring an engine speed and an outside temperature, and selecting an engine starting sound based on the engine speed and outside temperature and outputting it to a speaker It characterized in that it comprises a.

The engine starting sound is characterized in that it cancels engine starting noise generated by engine restart.

After the step of selecting and outputting the engine starting sound to a speaker, the engine starting sound output through the speaker is received and analyzed, and the output of the engine starting sound is corrected based on the analysis result.

According to the present invention, engine sound and vibration are generated when the engine is stopped due to a stop, and when the engine is restarted, the engine starting sound is output to cancel the engine starting noise, and the generation of engine sound and vibration is stopped. It can offset the sense of heterogeneity caused by repeated occurrence and disappearance.

1 is a block diagram showing a virtual engine sound and vibration output device according to an embodiment of the present invention.
2 is a flowchart illustrating a virtual engine sound and vibration output method according to an embodiment of the present invention.
3 is a flowchart illustrating a virtual engine sound and vibration output method according to another embodiment of the present invention.
4 is a view for explaining a virtual engine sound and vibration output according to the present invention.
5 and 6 are views for explaining a virtual engine sound and vibration correction method according to the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, when it is determined that a detailed description of a related known configuration or function interferes with an understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the constituent elements of an embodiment of the present invention, terms such as first, second, A, B, (a), (b), and the like may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

1 is a block diagram showing a virtual engine sound and vibration output device according to an embodiment of the present invention.

Referring to FIG. 1, the virtual engine sound and vibration output device includes an engine controller 110, a temperature sensor 120, a speaker 130, a microphone 140, an acceleration sensor 150, and an amplifier 160. Include.

The engine controller 110 outputs an idle stop signal or a restart (go) signal to the engine according to whether the engine, which is an internal combustion engine, is in an idle state. In this case, the engine controller 110 may generate an idle stop signal (engine stop signal) and a restart signal (start signal) in the form of a controller area network (CAN) message and transmit it to the engine.

In other words, the engine controller 110 outputs an idle stop signal to the engine when the vehicle stops (stops) for a predetermined time or more. When the engine receives the idle stop signal transmitted from the engine controller 110, the operation stops. Meanwhile, the engine controller 110 outputs a restart (go) signal to the engine when the vehicle attempts to restart after stopping. The engine controller 110 determines that the vehicle attempts to restart when the driver takes his or her foot off the brake pedal or presses the clutch pedal, and outputs a restart signal to the engine. When the engine receives a restart signal from the engine controller 110, the engine starts again.

In addition, the engine controller 110 may obtain information on an engine revolution (RPM) immediately before and/or immediately after an idle stop of the engine and transmit it to the amplifier 160.

At least one temperature sensor 120 may be installed in the vehicle, and measures the outside temperature of the vehicle. The outside temperature information is used as offset information of engine sound and vibration. As the temperature sensor 120, a resistance thermometer, a thermistor, a resistance temperature detector (RTD), and/or a thermocouple thermometer may be used.

The speaker 130 is disposed inside the vehicle (eg, a door) to generate engine sound and vibration. At this time, the speaker 130 vibrates the diaphragm in the speaker 130 to generate vibration similar to engine vibration. The speakers 130 are installed on both doors of the vehicle, respectively, and may include sub-woofer speakers. The engine sound is a low-pitched engine sound, and the vibration is a low-frequency (low frequency band) vibration.

The microphones 140 are installed on all seats of the vehicle, respectively, and two or more microphones may be installed per seat. The microphone 140 collects engine sound output through the speaker 130, converts it into an electric signal, and outputs it to the amplifier 160. In other words, the microphone 140 continuously receives engine sound output through the speaker 130 and feeds it back to the amplifier 160.

The acceleration sensor 150 is installed on the vehicle body below each seat in the vehicle to continuously measure the vibration of the vehicle. In other words, the acceleration sensor 150 may measure vibration generated by the speaker 130. The acceleration sensor 150 feeds back the measured vibration information to the amplifier 160.

The amplifier 160 is an external amplifier, obtains idling state information from the engine controller 110, artificially reproduces engine sound and vibration based on the obtained idling state information, and outputs it to the speaker 130. In other words, the amplifier 160 outputs engine sound and vibration using the speaker 130 when idle is stopped. Meanwhile, if the amplifier 160 is not in the idle stop state, that is, if the engine is restarted, the engine starting noise is canceled by using an Active Noise Canceling (ANC) technique. In addition, the amplifier 160 actively controls engine sound and vibration by receiving feedback from engine noise and vibration output through the speaker 130.

The amplifier 160 includes a memory (M) and a processor (P).

The memory M may store software programmed so that the processor P performs a predetermined operation, and may store data input to the processor P and/or data output from the processor P. In addition, the memory M may store a mapping table including an engine sound, an engine starting sound, and a vibration amount (vibration) according to the outside temperature and/or the engine speed. The memory M may store engine sound and vibration generation algorithms. Memory (M) includes flash memory, hard disk, SD card (Secure Digital Card), RAM (Random Access Memory, RAM), SRAM (Static Random Access Memory), ROM (Read Only Memory, ROM), PROM (Programmable Read Only Memory), EEPROM (Electrically Erasable and Programmable ROM), EPROM (Erasable and Programmable ROM), it may be implemented as at least one storage medium (recording medium) of the storage medium such as a register.

The processor P controls the overall operation of the amplifier 160. Processor (P) is an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Programmable Logic Devices (PLD), Field Programmable Gate Arrays (FPGAs), Central Processing Unit (CPU), microcontrollers, and microprocessors. It may be implemented with at least one or more of (microprocessors).

When the amplifier 160 receives idling state information including an idling stop signal from the engine controller 110 while the vehicle is running, it determines that an idling stop state (state) has occurred. When an idle stop condition occurs, the amplifier 160 acquires information about the outside temperature of the vehicle through the temperature sensor 120. In addition, the amplifier 160 may obtain engine speed (RPM) information immediately before and/or immediately after idle stop through the engine controller 110.

The amplifier 160 reads and reproduces the engine sound and vibration mapped from the memory M based on the outside temperature information and/or the engine speed information. In other words, the amplifier 160 selects and reproduces the engine sound and vibration from the memory M based on the outside temperature information and/or the engine speed information. Meanwhile, the amplifier 160 may read the engine sound and vibration mapped to the engine speed from the memory M, and correct the mapped engine sound and vibration based on the outside temperature information.

The amplifier 160 outputs the reproduced engine sound through the speaker 130 and generates the reproduced vibration through the speaker 130. At this time, the amplifier 160 gradually fades out the actual engine noise and engine vibration when the engine is stopped, so that the engine sound and vibration gradually increase (fade in).

The amplifier 160 receives engine sound and vibration output through the speaker 130 and analyzes the feedback sound and vibration to adjust the output phase of the engine sound and vibration. In other words, the amplifier 160 may correct the engine sound size and vibration amount based on the feedback sound and vibration. In addition, the amplifier 160 may analyze the feedback sound and vibration and adjust the timing of the engine sound and vibration generation (fade in/out) through phase movement.

On the other hand, when the amplifier 160 receives idle state information including a restart signal from the engine controller 110 in the idle stop state, it reproduces the engine starting sound and outputs it to the speaker 130. At this time, the amplifier 160 adjusts the engine sound and vibration output through the speaker 130 to gradually decrease.

In addition, the amplifier 160 may mix and output the multimedia sound and the engine sound when multimedia is being reproduced.

2 is a flowchart illustrating a virtual engine sound and vibration output method according to an embodiment of the present invention.

According to FIG. 2, the amplifier 160 checks whether an engine idle stop condition (idle battery condition) occurs while the vehicle is running (S110 and S120). When the amplifier 160 receives an idle stop signal from the engine controller 110, it determines that an idle stop condition occurs.

When an idle stop condition occurs, the amplifier 160 acquires engine speed information and outside temperature information immediately before and/or immediately after idle stop from the engine controller 110 and/or temperature sensor 120 (S130).

The amplifier 160 outputs engine sound and vibration based on engine speed information and/or outside temperature information (S140). The amplifier 160 retrieves and reproduces engine sound and vibration mapped to engine rotation information and/or outside temperature information from the memory M. The amplifier 160 outputs the reproduced engine sound and vibration to the speaker 130.

The amplifier 160 receives engine sound and vibration output through the speaker 130 through the microphone 140 and the acceleration sensor 150, and corrects the engine sound and vibration and outputs it (S150). The amplifier 160 may correct (adjust) the timing at which the engine sound and vibration are generated by analyzing the feedback sound and vibration. The amplifier 160 generates engine sound and vibration by correcting the engine sound and vibration generation time (output time) when the next idle stop condition occurs.

According to the above-described embodiment, engine sound and vibration similar to engine noise and engine vibration are output in the idle stop and restart situation, so that the vehicle occupant does not recognize the engine stop and start, thereby maintaining a constant ride comfort. Therefore, it is possible to increase the sense of stability of the vehicle occupant.

3 is a flowchart illustrating a virtual engine sound and vibration output method according to another embodiment of the present invention.

As shown in FIG. 3, when the vehicle stops for a predetermined time or more, the engine controller 110 transmits an idle stop signal to the engine side to stop the engine (S210). That is, the engine controller 110 switches the engine to an idle stop state when the vehicle stops for a predetermined time or more.

The amplifier 160 checks whether a restart state (restart state) occurs in the idle stop state (S220). When the amplifier 160 receives a restart signal from the engine controller 110, it is determined that a restart situation has occurred.

When a restart situation occurs, the amplifier 160 acquires outdoor temperature information and/or engine speed information (S230). The amplifier 160 may obtain information on the outside air temperature of the vehicle through the temperature sensor 120 and obtain information on the engine speed immediately before and/or immediately after idle stop through the engine controller 110.

The amplifier 160 outputs an engine starting sound through the speaker 130 based on the outside temperature and/or the engine speed (S240). The amplifier 160 reads the engine starting sound mapped to the outside temperature and/or the engine speed from the memory M and reproduces it. The engine starting sound output through the speaker 130 serves to cancel the engine starting noise generated by engine restart. In addition, the amplifier 160 stops the output of engine sound and vibration generated in the idle state. At this time, the amplifier 160 adjusts the engine sound and vibration to gradually decrease.

The amplifier 160 receives and analyzes the engine starting sound output through the speaker 130, and corrects and outputs the engine starting sound based on the analysis result (S250). The amplifier 160 receives feedback of the engine starting sound output through the microphone 150. The amplifier 160 may analyze the feedback sound and adjust the timing of generation of the engine starting sound (output and stop timing) afterwards.

According to the above embodiment, when the engine is switched from the engine off state to the engine on state, the engine start sound is output through the speaker to cancel the engine start noise generated by engine start, so that the vehicle occupant may recognize that the engine is continuously turned on. I can.

4 is a diagram for explaining a virtual engine sound and vibration output according to the present invention.

As shown in FIG. 4, at an idle stop of the engine, the amplifier 160 generates engine sound and vibration through the speaker 130. At this time, since the actual engine noise and engine vibration gradually decrease, the amplifier 160 gradually increases the magnitude of the engine sound and vibration so that the vehicle occupant cannot recognize the engine stop (idle stop) state. Accordingly, the vehicle occupant can be provided with a certain ride comfort and stability.

5 and 6 are diagrams for explaining a virtual engine sound and vibration correction method according to the present invention.

As shown in FIG. 5, when the engine sound and vibration output through the speaker 130 are delayed from the idle stop of the engine, the vehicle occupant is idle stop and restart. The actual engine noise and/or engine vibration generated at the point of (Go) can be recognized. The amplifier 160 may analyze a signal fed back through the microphone 150 and/or the acceleration sensor 160 to correct engine sound and vibration generation timing. Later, when an idle stop condition occurs, the amplifier 160 advances the engine sound and vibration generation time by a delay time than before to generate the engine sound and vibration.

As shown in FIG. 6, when the engine sound and vibration output through the speaker 130 are generated (first) before the engine idle is stopped (the idle stop time), the vehicle occupant is the idle stop and restart time. The actual engine noise and engine vibration generated from can be recognized. The amplifier 160 analyzes a signal fed back through the microphone 150 and/or the acceleration sensor 160 to correct the engine sound and vibration generation timing. The amplifier 160 generates an engine sound and vibration at the time of generating the corrected virtual engine sound and vibration when the next idle stop condition occurs. That is, the amplifier 160 generates engine sound and vibration by delaying the generation time of the engine sound and vibration by the difference between the generation time of the engine sound and vibration and the idle stop time of the engine than before.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

110: engine controller
120: temperature sensor
130: speaker
140: microphone
150: acceleration sensor
160: amplifier

Claims (15)

An engine controller that controls the idle state of the engine while driving
A speaker generating engine sound and vibration, and
Virtual engine sound and vibration output device comprising an amplifier for reproducing the engine sound and vibration according to the idle state and outputting it to the speaker.
The method of claim 1,
The amplifier obtains an engine speed from the engine controller when the idle state is an idle stop state, and outputs an engine sound and vibration mapped to the obtained engine speed to the speaker. Device.
The method of claim 2,
Further comprising a temperature sensor for measuring the outside temperature of the vehicle,
The amplifier is a virtual engine sound and vibration output device, characterized in that for correcting the engine sound and vibration in consideration of the outside temperature.
The method of claim 1,
Further comprising a microphone for receiving the engine sound output through the speaker and feeding back to the amplifier,
The amplifier is a virtual engine sound and vibration output device, characterized in that for correcting the output of the engine sound by analyzing the sound fed back through the microphone.
The method of claim 1,
Further comprising an acceleration sensor for measuring vehicle vibration due to vibration generated through the speaker,
The amplifier analyzes the vibration fed back by the acceleration sensor, and when the vibration generated through the speaker is delayed from the idle stop time of the engine, the output time of the vibration is advanced by a delay time than before. A virtual engine sound and vibration output device.
The method of claim 5,
The amplifier analyzes the feedback feedback, and when the vibration generated through the speaker is generated earlier than the idle stop time of the engine, the amplifier determines the difference between the output time of the vibration output through the speaker and the idle stop time of the engine. Virtual engine sound and vibration output device, characterized in that the output point of the vibration output through the speaker is delayed than before.
The method of claim 1,
The amplifier is a virtual engine sound and vibration output device, characterized in that when the idle state is a restart state, outputs an engine starting sound to the speaker to cancel the engine starting noise.
Checking the idle state of the engine while driving, and
A virtual engine sound and vibration output method comprising the step of outputting an engine sound and vibration through a speaker according to the idle state.
The method of claim 8,
The step of outputting the engine sound and vibration,
If the idle state is the idle stop state, acquiring information of at least one of an engine speed and an outside temperature, and
A virtual engine sound and vibration output method comprising the step of selecting and outputting the engine sound and vibration based on the obtained information.
The method of claim 8,
After the step of outputting the engine sound and vibration,
And correcting the output of the engine sound and vibration by receiving feedback of the engine sound and vibration output through the speaker and analyzing the feedback sound and vibration.
The method of claim 10,
In the step of correcting the output of the engine sound and vibration,
The virtual engine sound and vibration output method, characterized in that when the engine sound and vibration output through the speaker is delayed than the engine idle stop time, the output time of the engine sound and vibration is advanced by a delay time.
The method of claim 10,
In the step of correcting the output of the engine sound and vibration,
When the engine sound and vibration output through the speaker are generated earlier than the engine idle stop time, the engine sound and vibration output time is delayed by the difference between the engine sound and vibration output time and the engine idle stop time. Virtual engine sound and vibration output method, characterized in that.
The method of claim 8,
After the step of checking the idle state,
If the idle state is a restart state, obtaining the engine speed and the outside temperature, and
And outputting an engine starting sound to a speaker based on the engine rotation speed and the outside temperature.
The method of claim 13,
The engine starting sound is a virtual engine sound and vibration output method, characterized in that canceling the engine starting noise generated by the engine restart.
The method of claim 13,
After the step of selecting the engine starting sound and outputting it to a speaker,
A virtual engine sound and vibration output method, characterized in that the engine starting sound output through a speaker is received and analyzed, and the output of the engine starting sound is corrected based on the analysis result.

Images