JP2001034274A - Automotive audio equipment - Google Patents

Abstract

(57) [Summary] In a hybrid car having an engine and a drive source other than the engine, noise peculiar to the hybrid car is estimated without using a microphone, and reproduced sound with a volume and sound quality optimal for the user. And an audio device that can provide the audio device. SOLUTION: This is an on-vehicle audio apparatus having an automatic sound volume / sound quality correcting means 10 for adjusting an audio reproduction sound to a sound volume / sound quality adapted to noise in a vehicle cabin, comprising a driving wheel, a driving source, and a power source. An energy flow detecting means 6 for detecting information regarding various flows of energy mutually transmitted between the automatic volume and sound quality correcting means 10
Adjusts the volume and sound quality of the audio reproduction sound in accordance with the magnitude of the amount of energy transmission detected by the energy flow detection means 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted audio device, for example, a vehicle-mounted audio device suitable for being mounted on a hybrid car. It is difficult to always provide an optimal sound volume and sound quality to a user due to noise generated from a vehicle during traveling of an audio reproduction sound from a vehicle-mounted audio device. For this reason, in-vehicle audio devices provided with an automatic volume correction function for automatically correcting the volume in response to noise have been put to practical use.

On the other hand, in recent years, the realization of a hybrid car that incorporates not only an engine but also a motor (electric motor) as a driving source has come to be realized, and it has become possible to achieve epoch-making improvements in both fuel consumption and exhaust gas. Was. However, such a hybrid car has a completely different form of drive source compared to a conventional engine-driven vehicle, and therefore has a completely different form of noise generation, so that the conventional automatic volume correction function can be used as it is. Instead, it is required to realize an automatic volume and an automatic sound quality correction function unique to a hybrid car.

The present invention describes an audio device suitable for being mounted on such a hybrid car.

[0004]

2. Description of the Related Art A conventional on-vehicle audio device having an automatic sound volume correction function is mounted on an engine-driven vehicle. In order to perform the automatic sound volume correction, a vehicle mainly uses a microphone, a vehicle speed sensor, an engine speed sensor and the like. The noise in the room is directly detected or estimated.

[0005] Among them, noise detection by a microphone is as follows.
It picks up the noise that can be actually heard in the cabin, and enables accurate noise detection. However, since the actual sound in the cabin is composed of the original audio reproduction sound and the noise buried therein, a noise component extraction device is required to extract only this noise component. On the other hand, looking at the above-mentioned vehicle speed sensor and engine speed sensor, these sensors are used for noise detection for the following reasons. In the case of an engine-driven vehicle, most of the noise sources are road noise generated between the tires of the running vehicle and the road surface, so-called wind noise, and engine rotation noise. The noise from the noise source increases as the vehicle speed increases, and decreases as the vehicle speed decreases.

As described above, there is a close relationship between the noise in the passenger compartment of an engine-driven vehicle and the vehicle speed and engine speed of the vehicle. Paying attention to this point, the vehicle speed and the engine speed are detected using sensors, and the noise in the vehicle interior is estimated based on the detection results. Such estimation of the noise makes it possible to perform automatic volume correction with a certain degree of followability.

[0007]

The above-described noise component extraction device is used for detecting noise by the microphone. This device separates a noise component and an audio reproduction sound component from the sound in the vehicle compartment. And to analyze, F
There is a first problem that a complicated DSP device constituting a high-speed operation device such as an FT is required.

Further, the above-described noise estimation method for an engine-driven vehicle using the vehicle speed sensor and the engine speed sensor has the following problem. Here, considering a hybrid car, in the case of a hybrid car, a motor (electric motor) rotation sound is added to the above-described noise source in addition to the above-described road noise, wind noise, and engine rotation sound. . Further, the state of generation of noise from the noise source is not as simple as that of an engine-driven vehicle, but becomes complicated, which changes every moment.

That is, in the case of a hybrid car, the vehicle travels in a complicated combination of a total of four modes of operation and non-operation of the engine and operation and non-operation of the motor. Will change in a complicated manner from time to time. For this reason, even if a conventional noise estimation method adapted to an engine-driven vehicle is directly applied to an audio device mounted on a hybrid car, the volume and
There is a second problem in that the correction of the sound quality is misaligned, that is, the correction is insufficient or the correction is excessive, and it is difficult to provide the user with an optimum volume and sound quality.

The second problem arises from the fact that the motor rotation noise is added to the noise source in the conventional case. Specifically, when the vehicle decelerates, the drive wheels rotate the motor to generate a regenerative brake (regeneration brake). The motor rotation noise generated when the electric power is generated is added as noise, and the motor rotation noise when the motor rotates by receiving power supply from the battery is also added.

Accordingly, the present invention has been made in view of the above-described problems, and thus, even when the noise generation situation changes every moment without directly depending on the running state of the vehicle as in a hybrid car, the noise can be reduced without using a microphone. It is an object of the present invention to provide an in-vehicle audio device capable of performing automatic volume and sound quality correction by guessing with extremely high accuracy.

[0012]

FIG. 1 is a diagram showing a basic configuration of a vehicle-mounted audio device according to the present invention and a vehicle equipped with the same. The in-vehicle audio device 7 according to the present invention is an audio device mounted on a vehicle as follows. That is, the engine 1 and the motor 4 are provided as a drive source of the driving wheels 2 of the vehicle, and the generator 3 provided between the engine 1 and the motor 4 and the battery 5 associated with the generator 3 and the motor are provided. A vehicle-mounted audio device which is mounted on a vehicle provided as a power source and has an automatic sound volume / sound quality correction means 10 for adjusting audio reproduction sound from a sound source 8 to a sound volume / sound quality adapted to noise in a vehicle cabin of the vehicle. is there.

Here, the automatic sound volume / sound quality correcting means 10 adjusts the sound volume / sound quality of the audio reproduction sound in accordance with the magnitude of the transmission of the energy detected by the energy flow detecting means 6. And the energy flow detecting means 6
Are information on various flows (,...) Of energy mutually transmitted between the drive wheels 2, the drive sources (1, 4), and the power sources (3, 5). Performs the function of detecting

[0014] Thus, the audio reproduction sound always optimal for the user with respect to the volume and the sound quality is reproduced by the audio device 7.
Can be provided from the speaker 9. As described above, the audio device 7 of the present invention is preferably based on the energy flow information on the flow of energy (,. It is characterized in that automatic correction of volume and sound quality is performed by adding vehicle speed information and engine speed information. This makes it possible to estimate noise inherent in a hybrid car, which cannot occur in an engine-driven vehicle, with considerably high accuracy without using the above-described microphone. This will be described more specifically.

The characteristics of the noise generated by the hybrid car (◎ below) will be described for each of the operation modes (1) to (5). (1) When the vehicle is stopped ◎ When the battery 5 is fully charged, the engine 1 stops, and no noise is generated. -When the system is started, an idling sound is heard as in a normal engine-driven vehicle. * In the case of an engine-driven vehicle, in this case:-The engine is idling, and the engine noise is slightly audible compared to when the engine 1 is stopped. (The idling sound is always heard unless the engine 1 is stopped.) (2) Starting and running at low speed ◎ Since the motor 4 starts driving, there is no significant noise, and the increase in road noise with increasing vehicle speed is the main. It becomes noise. * In the case of an engine-driven vehicle, in this case: ・ Engine noise increases with an increase in engine speed,
Road noise increases with increasing vehicle speed.

(3) During normal running ◎ In order to achieve the maximum efficiency, the ON / OFF of the motor 4 and the ON / OFF of the engine 1 change rapidly, and sometimes the motor / engine stops. The main noise is road noise and wind noise. * In the case of an engine-driven vehicle, in this case: ・ Noise of the engine 1, road noise and wind noise are always generated.

(4) During full-open acceleration • A high load state is established, and both the motor 4 and the engine 1 are fully activated. The engine speed increases considerably, the noise of the engine 1 increases, and road noise and wind noise increase. * In the case of an engine-driven vehicle, in this case:-The engine speed increases considerably and the noise of the engine 1 increases. Road noise and wind noise also increase.

(5) At the time of deceleration When the vehicle decelerates slowly, both the engine 1 and the motor 4 stop, and the road noise and the wind noise, which gradually decrease as the vehicle speed decreases, are the main noises. In the case of sudden deceleration exceeding a certain set value, the above-mentioned "regenerative brake" is activated, and the sound of the motor 4 becomes loud. Just before the stop,
The sound of the motor 4 is heard. * In the case of an engine-driven vehicle, in this case:-The engine speed decreases and the noise of the engine 1 decreases. As the vehicle speed decreases, both road noise and wind noise gradually decrease.

The above-mentioned various noises characteristic of the hybrid car can be estimated from the energy flow information detected by the energy flow detecting means 6 shown in FIG. 1, and are reflected in the automatic sound volume and sound quality correction (means 10). Thus, the audio reproduction sound optimal for the user is provided from the speaker 9. Note that the energy flow detecting means 6 is, specifically, a monitor M in a known vehicle "Prius".
Energy flow data to be displayed on (Fig. 1) (described later)
Is realized as generating means. In the present invention, the existing energy flow data is used as the above-mentioned energy flow information.

[0020]

FIG. 2 is a block diagram showing an audio apparatus according to the present invention and its peripheral function units. Throughout the drawings, the same components are denoted by the same reference numerals or symbols. In FIG. 2, components 6, 7,
8, 9, 10, M and AMP are as already shown in FIG. The components newly shown in FIG. 2 include a determination / control unit 11 and a volume / control unit which are main components of the automatic volume / sound quality correction unit 10 in the audio device 7.
A sound volume adjusting unit 12, a user volume / sound quality setting unit 13 and a user effect selecting unit 14 for giving various kinds of instruction information from a user to the judgment / control unit 11, and an audio device 7
, An existing vehicle speed detecting unit 21, an engine speed detecting unit 22, and a road surface condition detecting unit 23 provided around the vehicle.

As shown in FIG. 2, the audio device 7 comprises:
A user volume / sound quality setting unit 13 cooperating with the volume / sound quality correction means 10 is provided to enable the degree of volume / sound quality adjustment to be set according to the volume / sound quality set by the user. User effect selecting unit 14 which cooperates with 10
And the effect of adjusting the volume and sound quality can be selected to be large or small according to the user's preference.

As shown in FIG. 2, the audio device 7
A vehicle speed detection unit 21 mounted on the vehicle is provided in the vicinity of the vehicle, and according to the fluctuation of the vehicle speed detected by the vehicle speed detection unit 21, the adjustment amount of the volume and sound quality with respect to the audio reproduction sound is further corrected. To In the vicinity thereof, there is an engine speed detecting unit 22 mounted on the vehicle,
In accordance with the fluctuation of the engine speed detected by the engine speed detecting unit 22, the adjustment amount of the volume and sound quality for the audio reproduction sound is further corrected.

Further, the vehicle has a road surface condition detecting unit 23 mounted on the vehicle, and the volume of the audio reproduction sound and the volume of the audio reproduction sound are changed in accordance with the fluctuation of the road surface flatness (road surface unevenness) detected by the road surface condition detecting unit 23. The adjustment amount of the sound quality is further corrected. The energy flow detecting means 6 shown in FIG. 2 (also in FIG. 1) will be further described. As described above, the energy flow detecting means 6 is an existing energy flow data generating means to be displayed on the monitor M in the known vehicle "Prius". This energy flow data is used as input data to the monitor M. On the other hand, in the present invention, it is used as energy flow information to be given to the automatic sound volume / sound quality correction means 10. That is, the energy flow data input to the monitor M and the energy flow information are substantially the same. Therefore, the energy flow data to the monitor M, which is the energy flow information, is shown more specifically below.

FIG. 3 shows an example of the screen of the monitor M (part 1), FIG. 4 shows the same (part 2), and FIG. 5 shows the same (part 3). (A) to (I) shown in FIGS. 3 to 5 are monitor screens for each operation mode. In each figure, “engine” indicates the engine 1, “battery” indicates the battery 5, and “motor” indicates the motor 4 , “Tire” means the driving wheel 2.
The generator 3 is not displayed as an image on the actual monitor (M) screen.

3 to 5, the energy flow data on the monitor M is displayed as a thick arrow with hatching. The energy flow detecting means 6 for generating these energy flow data is mainly composed of a microcomputer (microcomputer 31 in FIG. 6) which detects and takes in a required physical quantity of each part around the engine. A program for creating predetermined energy flow data is executed by the microcomputer. These existing energy flow data are utilized as energy flow information in the present invention.

The monitor screens (A) to (I) shown in FIGS. 3 to 5 will be briefly described below. [1: At the time of system start / stop] At the time of (A) or (B) start, the engine 1 is started. However, when the temperature of the cooling water exceeds a certain level, the engine 1 is automatically stopped.

(A) or (B) When the vehicle is stopped, the engine is operated when charging of the battery 5 or driving of the compressor of the air conditioner is required, but otherwise the engine 1 is stopped. [2: When Starting / Low Speed Running] (C) In a region where the engine efficiency is low such as low speed running, the fuel is cut or the engine 1 is stopped and the motor 4 is turned off.
Travel by. [3: During Normal Running] (D), (E) or (F) The engine power is split into two paths by a power split mechanism (not shown). Two paths, one for directly driving the axle and the other for driving the generator 3 to generate power.

(D), (E) or (F) The electric power drives the motor 4 to assist the driving force. The ratio of these routes is controlled so as to have the maximum efficiency. (D), (E) or (F) When the charge amount of the battery 5 decreases, the power generation amount is increased and the battery 5 is automatically controlled so as to maintain a constant charge state. (G) Since the axle drive is not required on a downhill or the like, both the engine 1 and the motor 4 may stop. [4: High load (at full-open acceleration)] (H) At high load such as at full-open acceleration, electric power is also supplied from the battery 5 to further add a driving force. [5: At the time of deceleration / braking] (I) At the time of deceleration / braking, the motor 4 driven by the wheel (2) acts as the generator 3 to generate regenerative power. The energy recovered by the regenerative power generation is stored in the battery 5.

Referring again to FIG. 1 based on the understanding of the energy flow shown in FIGS. 3 to 5, the description relating to FIG. 1 shows that the “energy flow detecting means 6 is mounted on the vehicle, It has a function of detecting information on various flows (,...) Of energy transmitted between the driving wheel 2, the driving sources (1, 4), and the power sources (3, 5). " However, the following two embodiments (I) and (II) are more preferably used. That is, (I) the amount of energy transmitted from the engine 1 to the drive wheels 2 and the amount of energy transmitted from the engine 1 via the generator 3 to the motor 4
In addition, the volume and sound quality of the audio playback sound are adjusted according to the magnitude of the amount of energy transmitted to the battery 5.

(II) The volume and sound quality of the audio reproduction sound are changed in accordance with the amount of transmission of each energy transmitted between the driving wheel 2, the generator 3 and the battery 5 and the motor 4. adjust. FIG. 6 is a diagram showing a specific example of the audio device 7 shown in FIG. In this figure, a sound source (8 in FIG. 2) is a CD player 38, a user volume / sound quality setting unit (13 in FIG. 2) is a VOL (volume) knob 33, and a user effect selection unit (14 in FIG. 2) is an effect. As the changeover switch 34,
The determination / control unit (11 in FIG. 2) serves as a microcomputer (microcomputer) 31 and controls a volume / sound quality adjustment unit (1 in FIG. 2).
2) is shown as the electronic VOL-IC 32, respectively.

In the specific example shown in FIG. 6, the microcomputer 31 is also used as the already described microcomputer (a microcomputer constituting the main part of the energy flow detecting means 6), and is also connected to the monitor M. Microcomputer 31
From the vehicle information LAN 37 via the communication IC 36
Collect various information. Various detection units 21, 22 and 23 shown in FIG. 2 are connected to the LAN 37, and the detection data is collected from these detection units and transferred to the microcomputer 31.

Referring to the engine speed detecting section (22 in FIG. 2) among the various detecting sections (21, 22, 23), the detecting section 22 is provided for a predetermined cylinder in the engine 1 of the vehicle. An operation is performed to determine the engine speed from the magnitude of the output interval of a signal indicating that the fuel has been injected for a certain number of times. This uses the “fuel injection time” information originally generated in the “Prius” and loaded on the vehicle information LAN 37 to easily determine the engine speed.

The fuel injection time information will be described in more detail. For example, when fuel is injected from the fuel injection into the first cylinder in the engine 1, 20 injection times (referred to as one event) for each injection are accumulated, and the total is calculated. It is input to the microcomputer 31 as a timing signal. The engine speed is determined from this timing signal.

That is, since one event occurs at the timing of 20 injections, the engine speed can be known from the event interval. For example, if the event interval is 80
In the case of 0 ms, 20 injections are equivalent to 40 rotations in four cycles, and therefore, the engine speed (rpm) is (40)
/0.8)×60=3000 revolutions / minute.

Next, the various detectors (21, 22, 23)
Looking at the road surface condition detection unit (23 in FIG. 2),
This can be realized by an existing suspension damping control sensor (not shown). Usually, road surface irregularities are detected from the output signal of this sensor, and the damping force of the suspension is adjusted. Therefore, the output signal of this sensor is used as the road surface unevenness information,
Can be captured. In general, if the road surface is very uneven, the noise in the vehicle interior increases, and in such a case, the volume is increased. Alternatively, the sound quality of the audio reproduction sound, for example, the low-frequency component (or the high-frequency component) is enhanced according to the user's preference.

It should be noted that a wide variety of vehicle speed detectors 21 are already known, and any of them may be employed, and therefore will not be described in further detail. Under the above environment, the effect changeover switch 34 (the user effect selecting unit 14 in FIG. 2).
Indicates which of the factors, such as energy flow, vehicle speed, fuel injection time, and road surface conditions, the user wants to prioritize (or conversely ignore) to correct the volume and sound quality, Or want to increase the amount of adjustment for correction,
Various user needs can be captured, such as whether the user wants to reduce the size, take advantage of such adjustment, or want to cancel.

Hereinafter, a typical operation example will be described. FIG. 7 is a flowchart (part 1) illustrating an operation example according to the present invention;
FIG. 8 is the same drawing (No. 2). 7 and 8 are performed according to a program in the microcomputer 31 (FIG. 6).

Step ST1: The user operates the VOL knob 3
The microcomputer 31 detects the volume position set by 3. This is set as a volume position a. Step ST2: The microcomputer 31 detects effect information selected by the user with the effect switch 34. This is referred to as effect information b. Step ST3: The microcomputer 31 detects the vehicle speed from the vehicle speed detector 21. This is assumed to be the vehicle speed c.

Step ST4: The microcomputer 31 detects the amount of energy transmitted from the energy flow detecting means 6. This is defined as an energy transmission amount d. State ST5: On the other hand, the microcomputer 31 is always measuring the output interval of the above-described fuel injection time. Step ST6: The output interval of the fuel injection time immediately before the series of routines shown in FIGS. 7 and 8 is detected. This is defined as an output interval e.

Step ST7: Next, the microcomputer 31 determines the amount of volume increase (the amount to be corrected by the automatic volume / sound quality correction means 10) based on the above a to e. This is referred to as a volume increase α. More specifically, the vehicle speed (c), the energy transmission amount (d), the engine speed of the vehicle (output interval e)
And a volume (a) set by the user as a parameter, a volume setting matrix (first matrix) in which a volume adjustment amount for each level of the set volume is set in advance, and the degree of the adjustment is determined from this volume setting matrix. Read and decide.

In this case, the magnitude of the effect of the adjustment on the volume and the sound quality can be selected according to the user's designation, that is, according to the effect information (b) (if there is a special designation from the user). Step ST8: Based on the road surface unevenness information from the road surface condition detecting section 23, the above-mentioned volume increase amount α is further corrected. This is referred to as a corrected volume increase α ′.

That is, the volume adjustment amount is further corrected in accordance with the fluctuation (unevenness) of the road surface flatness detected by the road surface condition detection unit 23 mounted on the vehicle. Step ST9: The low-frequency component of the audio reproduction sound enhanced based on the sound quality set by the user from the user sound volume / sound quality setting unit 13 is further corrected in accordance with the corrected sound volume adjustment amount (α ′). This enhancement reduction component is denoted by β.

In this case, the corrected volume adjustment amount (α ')
And a low-frequency enhancement matrix (second matrix) in which the reduction component enhancement amount (β) is paired, and the low-frequency component enhancement amount (β) is read from the low-frequency enhancement matrix and determined. To do. The above-described first matrix (volume setting matrix) and second matrix (low-frequency enhancement matrix) will be described later in detail.

Step ST10: The values (a + α ′) and β obtained by the microcomputer 31 in the above steps are converted into the electronic VOL.
-Send to the IC 32 and correct the target volume and sound quality
The first routine is completed, and step ST1 is performed again.
Return to Here, looking again at step ST3, when the adjustment amount of the sound volume and the sound quality is changed according to the change of the vehicle speed (c), the adjustment amount is changed depending on whether the vehicle speed exceeds a predetermined speed threshold value Ths. Here, it is desirable that the speed threshold value Ths has a hysteresis such that the speed threshold value Ths has a different value when the vehicle speed (c) increases and when the vehicle speed (c) decreases.

For example, while accelerating, "10-30
The transition from the correction amount X in km to the correction amount Y in 30 to 50 km is performed when the vehicle speed exceeds 35 km / h. When the vehicle speed rises and turns down this time, the vehicle speed is 25km
/ H is returned from "the correction amount Y at 30 to 50 km" to "the correction amount X at 10 to 30 km". In this case ± 5
It has a hysteresis of km / h.

Referring again to step ST6 for the same purpose, when changing the adjustment amount of the volume and sound quality in accordance with the variation of the output interval e (engine speed), a predetermined engine speed threshold value Thr is changed to the engine speed. The adjustment amount is changed depending on whether or not the engine speed (e) has exceeded, and the engine speed threshold value T
It is desirable that hr has a hysteresis so that it has a different value when the engine speed (e) increases and when the engine speed (e) decreases.

For example, the output interval (e) of the fuel injection time is
The transition from small to large is performed when e exceeds 900 ms, and the transition from large to small is performed when e becomes 700 ms or less. In this case, it has a hysteresis of ± 100 ms. The reason why the hysteresis is provided in this way is to prevent the volume change from following the subtle changes in the vehicle speed or the engine speed near the threshold level. If the change in volume follows too quickly, the “sound sensation” becomes remarkable, and the user will feel uncomfortable.

Further description will be added for steps ST7, ST8 and ST9 in FIG. First, step ST7
Consider the first matrix (volume setting matrix) in. FIG. 9 is a diagram (part 1) showing a detailed example of the first matrix, and FIG. 10 is a diagram (part 2) of the same.

These matrices are, so to speak, correction tables. Each value in the table is calculated in advance and stored in the microcomputer 3.
1 (FIG. 6). However, only a part of the correction table is shown due to space limitations. FIG. 9 shows the first matrix when the effect is small, and FIG. 10 shows the large effect.
The first matrix at the time of is shown. The large effect and the small effect refer to the magnitude of the effect selected by the user effect selecting unit 14 according to the user's preference.

In each of FIGS. 9 and 10, 1 in the column of volume position (a in step ST1)
Numerical values such as 2, 3,... Represent the above-mentioned volume increase amount α. 0 indicates that the volume is set by the user. Here, looking at step ST8 (FIG. 8), the above-described volume increase α
Is corrected to α 'based on the road surface unevenness information. When the irregularity information is larger than a certain threshold value (the irregularity is severe), α is added to a certain amount and α ′
And When the threshold value is smaller (the unevenness is gentle), α = α ′ may be set.

In the specific example, the above-mentioned fixed amount is set to +2 dB. FIG. 11 is a diagram showing a detailed example of the second matrix.
As shown in step ST9 (FIG. 8), the enhanced low-frequency component β changes according to the above α ′. A correction table in which the degree of change at this time is predetermined is a second matrix (low-frequency enhancement matrix). This β is represented as an offset value from the user's set value of “BASS” by the user volume / sound quality setting unit 13 (FIG. 2). This offset value corresponds to the BA formed in the electronic VOL-IC 32 (FIG. 6).
For the SS control circuit (not shown),
Provided by the microcomputer 31.

[0052]

As described above, according to the present invention, in a hybrid car, without using a microphone, optimum software is provided to the user with relatively simple software regardless of whether the vehicle is stopped or running. It is possible to provide an audio reproduction sound with an appropriate volume and sound quality.

In particular, in the case of a hybrid car, unlike a conventional vehicle driven by only an engine, what contributes to the noise in the vehicle compartment is that there is a motor noise in addition to the vehicle speed, the engine speed and the road surface condition. is there. Another characteristic is that regenerative braking noise during deceleration (regenerative power from the drive wheels drives the motor, generating loud motor noise).
The greatest effect of the present invention is that it can cope with the noise generated from the motor in this way. In this case, since the noise is estimated by paying attention to the energy transmission amount, the present invention is also applicable to an electric vehicle (EV) or a normal gasoline vehicle as well as a hybrid car.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a vehicle-mounted audio device according to the present invention and a vehicle equipped with the same.

FIG. 2 is a block diagram showing an audio device according to the present invention and its peripheral function units.

FIG. 3 is a diagram (part 1) illustrating an example of a screen of a monitor M;

FIG. 4 is a diagram illustrating an example of a screen of a monitor M (part 2).

FIG. 5 is a diagram illustrating an example of a screen of a monitor M (part 3).

6 is a diagram showing a specific example of the audio device 7 shown in FIG.

FIG. 7 is a flowchart (part 1) illustrating an operation example according to the present invention;

FIG. 8 is a flowchart (part 2) illustrating an operation example according to the present invention.

FIG. 9 is a diagram (part 1) illustrating a detailed example of a first matrix.

FIG. 10 shows a detailed example of a first matrix (part 2).
It is.

FIG. 11 is a diagram showing a detailed example of a second matrix.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Drive wheel 3 ... Generator 4 ... Motor 5 ... Battery 6 ... Energy flow detection means 7 ... Audio equipment 8 ... Sound source 9 ... Speaker 10 ... Automatic volume / sound quality correction means 11 ... Volume / sound quality adjustment part 12 ... Judgment / control unit 21: vehicle speed detecting unit 22: engine speed detecting unit 23: road surface condition detecting unit

Continued on the front page (72) Inventor Yoshitaka Kato 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation F-term (reference) 5J100 JA05 JA07 KA05 LA00 LA10 MA01 QA02 SA06

Claims (14)

[Claims] An engine and a motor are provided as driving sources for driving wheels of a vehicle, and a generator provided between the engine and the motor and a battery associated with the generator and the motor are powered by an electric power. Mounted on a vehicle equipped as a source,
An in-vehicle audio device having an automatic sound volume / sound quality correction unit that adjusts an audio reproduction sound from a sound source to a sound volume / sound quality adapted to noise in a vehicle cabin of the vehicle, wherein the audio device is mounted on the vehicle and includes the drive wheel. And an energy flow detecting means for detecting information on various flows of energy mutually transmitted between the driving source and the power source, wherein the automatic sound volume / sound quality correcting means is provided by the energy flow detecting means. An in-vehicle audio device, wherein a volume and a sound quality of the audio reproduction sound are adjusted according to a magnitude of the detected transmission amount of the energy. 2. The amount of transmission of the energy transmitted from the engine to the drive wheels and the amount of transmission of the energy transmitted from the engine to the motor and the battery via the generator, respectively. Depending on,
2. The volume and tone quality of the audio playback sound are adjusted.
2. The on-vehicle audio device according to claim 1. 3. The volume and sound quality of the audio reproduction sound according to the magnitude of the amount of transmission of the energy mutually transmitted between the drive wheel, the generator, the battery, and the motor. The in-vehicle audio device according to claim 1, wherein: 4. A vehicle speed detecting unit mounted on the vehicle, wherein a vehicle speed detecting unit detects a vehicle speed detected by the vehicle speed detecting unit.
2. The on-vehicle audio device according to claim 1, wherein a correction is further made to an adjustment amount of volume and sound quality for the audio reproduction sound. 5. The method according to claim 1, wherein the adjusting amount of the sound volume and the sound quality is changed in accordance with the change of the vehicle speed, and the adjusting amount is changed depending on whether or not the vehicle speed exceeds a predetermined speed threshold value. 5. The on-vehicle audio device according to claim 4, wherein the speed threshold value has a hysteresis such that the speed threshold value is different when the vehicle speed increases and when the vehicle speed decreases. 6. An engine speed detecting unit mounted on the vehicle, wherein the volume and tone of the audio reproduction sound are adjusted in accordance with a change in the engine speed detected by the engine speed detecting unit. The engine speed is further determined based on the output interval of a signal indicating that a predetermined number of times of fuel has been injected into a predetermined cylinder in the engine of the vehicle. 2. The on-vehicle audio device according to claim 1. 7. When changing the adjustment amount of the volume / sound quality according to the fluctuation of the engine speed, the adjustment amount is determined by whether or not the engine speed exceeds a predetermined engine speed threshold value. Change it,
7. The on-vehicle audio device according to claim 6, wherein the engine speed threshold value has a hysteresis such that the threshold value is different between when the engine speed is increasing and when the engine speed is decreasing. 8. A road surface condition detecting unit mounted on the vehicle, wherein a volume / tone quality adjustment amount for the audio reproduction sound is further adjusted according to a change in road surface flatness detected by the road surface condition detecting unit. The in-vehicle audio device according to claim 1, wherein a correction is made. 9. A sound processing apparatus comprising: a user effect selecting unit cooperating with the sound volume / sound quality correcting means, wherein the effect of the sound volume / sound quality adjustment is
2. The in-vehicle audio device according to claim 1, wherein the size can be selected according to a user's preference. 10. The apparatus according to claim 1, further comprising a user volume / sound quality setting unit cooperating with said volume / sound quality correction means, wherein a degree of adjustment of said volume / sound quality is set according to a volume / sound quality set by a user. The in-vehicle audio device according to the above. 11. A sound volume setting matrix in which a vehicle speed of the vehicle, the energy transmission amount, an engine speed of the vehicle, and a sound volume set by the user are used as parameters, respectively, and a sound volume adjustment amount for each level of the set sound volume is set in advance. The on-vehicle audio device according to claim 10, further comprising: reading the level of the adjustment from the volume setting matrix. 12. The in-vehicle audio device according to claim 11, wherein the volume adjustment amount is further corrected according to a change in flatness of a road surface detected by a road surface condition detection unit mounted on the vehicle. 13. A low-frequency component of the audio reproduction sound, which is enhanced based on a sound quality set by the user from the user sound volume / sound quality setting unit, is further corrected according to the corrected sound volume adjustment amount. 13. The in-vehicle audio device according to item 12. 14. A low-frequency enhancement matrix in which the corrected volume adjustment amount and the enhancement amount of the reduction component are paired, and the enhancement amount of the low-frequency component is calculated from the low-frequency enhancement matrix. The in-vehicle audio device according to claim 10, wherein the audio device is read and determined.