JP2011126340A - Vehicular information display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a driver to intuitively understand driving operation which leads to energy-saving driving and to promote the improvement of energy-saving driving skill. <P>SOLUTION: A driving condition phase discrimination portion 2 discriminates the driving condition of a vehicle into three phases of "acceleration", "cruise" and "deceleration" and a driving operation evaluation portion 3 evaluates the driving operation of the driver in each phase. A display control portion 4 controls an image signal to a display 1b according to the driving condition phase and the evaluation result of the driving operation, indicates a phase of the driving condition based on an attitude of a model vehicle displayed on a display, and indicates an evaluation value of the driving operation based on the display position of the model vehicle. Thereby, the driver is able to intuitively understand the driving operation that leads to the energy-saving driving, so that the improvement of the energy-saving driving skill can be promoted. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicle information presentation apparatus that presents information related to driving of a vehicle to a driver.

  In recent years, for the purpose of fuel-saving driving of vehicles such as automobiles, an apparatus for displaying fuel consumption, instantaneous fuel consumption, and the like has been developed and installed in vehicles. Many of such devices display a display such as turning on an eco lamp by judging the fuel efficiency of a driving operation from the instantaneous fuel efficiency.

  However, these devices may not match the actual fuel saving level and the state of the eco lamp because the driving state of the vehicle is not taken into account. For example, during acceleration when the accelerator is depressed or when decelerating when the brake is depressed, no matter how good or bad driving is, the former is judged to be bad driving and the eco lamp is always turned off. Then, it is judged that it is a good driving | operation and there exists a problem of always lighting.

  In order to deal with such a problem, for example, Patent Document 1 discloses that the driving state of the vehicle is divided into three phases of “acceleration”, “cruising”, and “deceleration”, and the fuel-saving driving degree for each individual phase. There has been proposed a technique for calculating an indicator for determining the information and displaying information.

JP 2009-126464 A

  However, with the conventional technique disclosed in Patent Document 1, the driver can grasp whether or not the current driving operation is a fuel-saving driving, but how should the driving operation be performed? Further, it is difficult to grasp a specific method of coping such as how much the driving operation is improved to lead to fuel-saving driving, and it is insufficient for improving the skill of fuel-saving driving.

  The present invention has been made in view of the above circumstances, and enables a driver to intuitively understand a driving operation that leads to fuel-saving driving, and can promote improvement in skills of fuel-saving driving. The purpose is to provide.

  In order to achieve the above object, a vehicle information presentation device according to the present invention is a vehicle information presentation device that presents information related to driving of a vehicle to a driver, to which a current driving state belongs based on a predetermined evaluation guideline. A driving state phase discriminating unit that discriminates a phase, a driving operation evaluating unit that evaluates a driving operation of a driver and calculates an evaluation value of the driving operation for each phase of the driving state, and a driving discriminated by the driving state phase discriminating unit A state control unit that clearly indicates the phase of the state by the attitude of the model vehicle displayed on the display, and a display control unit that clearly indicates the evaluation value calculated by the driving operation evaluation unit by the display position of the model vehicle. .

  According to the present invention, it is possible for the driver to intuitively understand driving operations that lead to fuel-saving driving, and it is possible to promote improvement in skills of fuel-saving driving.

Schematic configuration diagram of vehicle information presentation device Explanatory drawing showing the display screen of the model vehicle Explanatory drawing showing the display state action Explanatory drawing which shows the example of expression of driving operation evaluation value Explanatory drawing showing blink around model vehicle

Embodiments of the present invention will be described below with reference to the drawings.
The vehicle information display device according to the present invention is mounted on a vehicle such as an automobile, and presents information in real time to the driver as to what kind of driving operation leads to fuel saving or fuel consumption deterioration. This makes it possible to learn fuel-saving driving methods. In this embodiment, information is mainly presented to the driver by an image, and voice output by uttering a predetermined phrase is also used.

  As shown in FIG. 1, an information presentation apparatus 1 according to the present embodiment (hereinafter simply referred to as “information presentation apparatus 1”) displays a controller 1a mainly composed of a microcomputer and displays information to a driver as an image. Display 1b, and a speaker 1c that outputs information to the driver as audio. The controller 1a, as its functional unit, determines the driving state of the vehicle in three phases of "acceleration", "cruising" and "deceleration" based on signals from various sensors and switches (not shown). Driving state phase determination unit 2, driving operation evaluation unit 3 that evaluates the driving operation of the driver in each phase of the driving state, display that controls the image signal on the display 1b according to the driving state phase and the evaluation result of the driving operation The control unit 4 includes an audio control unit 5 that controls an audio signal to the speaker 1c in accordance with an evaluation guideline for speech output in each phase of the driving state.

  The information presentation apparatus 1 according to the present embodiment is premised on presenting information for causing a driver to properly grasp driving states such as “acceleration”, “cruising”, and “deceleration” by image representation using a vehicle image. In addition, information is presented so that the user can intuitively understand how or how much the driving operation should be improved according to each driving state, and the driver does not always have to watch the screen. In addition, information is presented so that it can be intuitively understood that a good driving operation is continuing or a bad operation.

  Therefore, the display control unit 4 holds in advance the data of the vehicle image to be displayed on the display 1b, and controls the display position, display posture, etc. of the vehicle image according to the driving state phase and the evaluation result of the driving operation. A first image processing unit 4a, a bar graph expressing the evaluation result of the driving operation, a display color and display size of the vehicle image, a mark to be added to the vehicle image, and the like. The image data from the second image processing unit 4b is sent to the first image processing unit 4a, is combined with the image data processed by the first image processing unit 4a, and is output as a display image to be displayed on the display 1b.

  The display control unit 4 and the audio control unit 5 may be independent as a processing unit different from the controller 1a and connected to each other via a communication line.

  Next, the function of each part is demonstrated in detail about the process which concerns on the information presentation to the driver mainly having the image expression by a vehicle image.

  First, the driving state phase discriminating unit 2 uses the evaluation guidelines set in advance from the viewpoint of fuel-saving driving to determine whether the current driving state is “acceleration” or “cruising” from the driver's accelerator operation, brake operation, vehicle state, etc. And “deceleration”, the phase belongs to. In the present embodiment, the evaluation guideline for determining the driving state is set as follows, and the determination result of the driving state based on the evaluation guideline is sent to the display control unit 4 and displayed on the display 1b. However, it is possible to easily grasp the current operating state.

(A1) Acceleration The following guidelines Ai1, Ai2, and Ai3 are evaluated to determine whether or not the current operation state is an acceleration state.
Pointer Ai1… Whether creep is being used when starting the vehicle Pointer Ai2… While the accelerator is gradually being depressed Pointer Ai3—While the vehicle is accelerating at a low engine speed and a low accelerator opening Specifically, the following conditions Aj1, Aj2 When both of these conditions are satisfied as determination conditions, the current operating state is determined as “acceleration”.
Condition Aj1 ... Accelerator on Condition Aj2 ... Vehicle acceleration A1 or higher

(B1) Cruise The following guidelines Bi1, Bi2, Bi3 are evaluated to determine whether or not the current driving state is a cruise state.
Pointer Bi1 ... is it running at a constant speed without unnecessary acceleration / deceleration? Pointer Bi2 ... is it running at a constant speed without rough accelerator operation? Pointer Bi3 ... is it running at a high shift position? The following conditions Bj1 and Bj2 are used as determination conditions, and when both of these conditions are satisfied, the current driving state is determined as “cruising”.
Condition Bj1 ... Accelerator on Condition Bj2 ... Less than vehicle acceleration A1

(C1) Deceleration The following guidelines Ci1 and Ci2 are evaluated to determine whether or not the current operating state is a deceleration state.
Pointer Ci1 ... Whether the vehicle is decelerating with the accelerator off Guideline Ci2: Is the vehicle slowly decelerating with a weak brake Specifically, when the following determination condition Cj1 is satisfied, the current operating state is determined as "deceleration".
Condition Cj1: accelerator off

  The driving operation evaluation unit 3 calculates the following driving operation evaluation value Eval (t) for each phase of the driving state, and does not step on the accelerator, moderate accelerator operation, stepping on the accelerator, rough accelerator operation, Evaluate driver's driving operations such as smooth accelerator operation, excessive braking, and moderate braking operation.

(A2) Driving operation evaluation value in acceleration state The evaluation guideline Ai1 at the time of vehicle start is evaluated until the set time T1 elapses after the brake is turned off. Specifically, the time ACCon until the accelerator is turned on is acquired, and the driving operation evaluation value Eval (t) is calculated by the following equation (1).
Eval (t)
= 100 × (T1-t) / T1: ACCon <T1
= 0: ACCon ≧ T1 (1)

From the accelerator-on state, the evaluation guideline Ai2 regarding the depression of the accelerator is evaluated until the set time T2 elapses. Specifically, the engine speed EG (T) changes linearly according to the time ACC (t) from the time the accelerator is turned on, and when the set time is reached, the engine speed EG (t) becomes the set speed Nacc. A linear function F (t) is defined, and the driving operation evaluation value Eval (t) is calculated by the following equation (2). In the equation (2), C1 is a constant.
Eval (t) = 0-100 × F (t) -EG (t) / C1 (2)

Thereafter, the evaluation guideline Ai3 for acceleration is evaluated, and the driving operation evaluation value Eval (t) is calculated by the following equation (3). In the equation (3), C2, C3 and C4 are constants.
Eval (t)
= 0: EG (t) <Nacc, ACC (t) <C2
= 0 + 50 × (EG (t) −Nacc) / C3: EG (t) ≧ Nacc
= 0 + 50 × (ACC (t) −C2) / C4: ACC (t) ≧ C2
= 0 + 50 × (EG (t) −Nacc) / C3
+ 50 × (ACC (t) −C2) / C4: EG (t) ≧ Nacc, ACC (t) ≧ C2
... (3)

(B2) Driving operation evaluation value in cruising state Evaluation guideline Bi1 for traveling at a constant speed and evaluation guideline Bi2 for accelerator operation are evaluated, and vehicle speed dispersion amount Vvar and accelerator opening dispersion amount ACCvar for the past T3 seconds are obtained. calculate. Further, the evaluation guideline Bi3 regarding the shift position is evaluated, and the correction amount Csht corresponding to the shift position for the past T3 seconds is determined. Then, using the correction amount Csht and the predetermined weighting coefficients α and β, the driving operation evaluation value Eval (t) is calculated by the following equation (4).
Eval (t) = 0 + α × Vvar + β × ACCvar + Csht (4)

For example, in the case of the fifth speed, the correction amount Csht is determined as follows, assuming that the fourth and fifth speeds are the correction amount Csht = 0. However, C5, C6 and C7 are constants (C5>C6> C7).
1st gear: Csht = -C5
2nd gear: Csht = -C6
3rd gear: Csht = -C7
4th and 5th gear: Csht = 0

(C2) Driving operation evaluation value in the deceleration state In the coasting state where the accelerator is off, the evaluation guideline Ci1 is evaluated, and the driving operation evaluation value Eval (t) is calculated by the following equation (5).
Eval (t) = 0 (5)

Further, when the brake is on, the evaluation guideline Ci2 is evaluated, the vehicle speed Vaccoff when the accelerator is off is measured, and the optimum time Tbst for deceleration due to the accelerator off is calculated from a vehicle speed table or the like to obtain the time Brkon until the brake is on . Then, the driving operation evaluation value Eval (t) is calculated by the following equation (6).
Eval (t)
= 0-100 × Brk (t) / C8: t <(Tbst-Brkon)
= 0-100 × (Ax (t) -C9): t ≧ (Tbst-Brkon) (6)
Where Brk (t): brake pressure at time t
Ax (t): vehicle deceleration at time t
C8, C9: Constant

  In the first image processing unit 4a, the display control unit 4 displays the vehicle image to be displayed on the display 1b based on the driving state phases of “acceleration”, “cruising”, and “deceleration” and the evaluation result of the driving operation of the driver. Set the display action for. With this display action, the driver can easily understand the driving state, and an image display that makes it easy for the driver to intuitively understand how or how much the driving operation improves to achieve fuel-saving driving. .

  That is, as shown in FIG. 2, a predetermined model vehicle 10 is displayed as a vehicle image on the display screen of the display 1b, and the display posture of the vehicle body of the model vehicle 10 is changed according to the phase of the driving state. As shown in FIG. 3, the display action corresponding to the phase of the driving state performs geometric image rotation with reference to the model vehicle 10 in the cruise state, and sets the display actions of “acceleration” and “deceleration”. .

  Specifically, as shown in FIG. 3B, an image 10a in which the model vehicle 10 is held horizontally in the cruising state is displayed, and when accelerating with the image 10a as a reference, as shown in FIG. 3A. Further, an image 10b in which the front suspension of the model vehicle 10 is lifted and an image 10c in which the rear suspension of the model vehicle 10 is lifted are displayed as shown in FIG.

  In addition, as a display action of “acceleration” and “deceleration”, the traveling road surface of the model vehicle 10 on the screen may be tilted.

  Further, as a display action for the evaluation result of the driving operation, as shown in FIG. 4, the display position of the model vehicle 10 is linearly changed according to the value of the driving operation evaluation value Eval (t). Specifically, the display position of the model vehicle 10 when the driving operation evaluation value Eval (t) = 0 is displayed at the center of the screen, and the display of the model vehicle 10 when the driving operation evaluation value Eval (t) = 100 is displayed at the right end of the screen. Using the position and the left end of the screen as the display position of the model vehicle 10 when the driving operation evaluation value Eval (t) = − 100, the display position of the model vehicle 10 is determined according to the value of the driving operation evaluation value Eval (t).

  At the same time, in conjunction with the display by the first image processing unit 4a, the second image processing unit 4b performs a process of visually expressing the evaluation result of the driving operation, and the driver intuitively determines whether the driving operation is good or bad. To be able to grasp. Therefore, as shown in FIGS. 2 to 4, the second image processing unit 4 b displays the bar graph 11 displayed at the bottom of the screen, the display color and display size of the model vehicle 10, and the mark 12 to be added to the model vehicle 10. It is set and sent to the first image processing unit 4a as image data to be added to the image data of the first image processing unit 4a.

  The bar graph 11 is arranged at the display bar 11a arranged in the lower horizontal direction of the display screen and the lower center position of the model vehicle 10, and the center of the model vehicle 10 according to the value of the driving operation evaluation value Eval (t). And a triangular indicator 11b that moves in the horizontal direction while indicating the position. The display bar 11a shows a portion having a high evaluation value corresponding to Eval (t) = 0 at the center, and a portion having a high evaluation value on the left side of the screen has a low evaluation value on the deceleration side (Eval (t) at the left end). = -100), the right side of the screen is set as the portion with a low evaluation value on the acceleration side (Eval (t) = 100 at the right end), and the evaluation result of the driving operation can be visually grasped by the display bar 11a and the indicator 11b. Yes.

  Further, the display color of the model vehicle 10, the display color of the model vehicle 10, and the mark 12 additionally displayed above the rear of the model vehicle 10 correspond to the fact that the driver cannot always watch the display screen. For example, when the evaluation value of the driving operation transitions from a low state to a high state at a short time interval, it is overlooked unless the driver is gazing at the screen. Therefore, in such a case, the display color of the model vehicle 10 is changed according to whether the evaluation of the driving operation is good or bad for the purpose of presenting to the driver that the evaluation has been low in the past.

  For example, as shown in FIG. 4B, in a state where the evaluation value is high such as moderate accelerator operation, smooth accelerator operation, and moderate brake operation, the model vehicle 10 (however, in FIG. The displayed image 10a) is displayed in a green display color. On the other hand, as shown in FIGS. 4 (a) and 4 (c), in a state where the evaluation value is low, such as excessive depression of the brake, excessive depression of the accelerator, excessive depression of the accelerator, rough accelerator operation, etc. However, the display color of the image 10c indicating the deceleration state in FIG. 4A and the image 10b indicating the acceleration state in FIG. 4C is changed to a red warning display color.

  When the display position of the model vehicle 10 moves to a position with a low evaluation value, it is emphasized that the evaluation value has been lowered by leaving an area 10 ′ that represents the afterimage of the model vehicle 10 in the center of the screen. To alert the driver.

  Further, as shown in FIG. 4A, a mark 12 displayed on the upper rear part of the model vehicle 10 is shown in a sweat mark 12a that emphasizes a driving operation with a low evaluation value on the deceleration side, and shown in FIG. 4B. As shown in FIG. 4C, three types of marks, a gas mark 12c for emphasizing a driving operation with a low evaluation value on the acceleration side, as shown in FIG. 4C. Is provided. By changing these marks 12a, 12b, and 12c according to the evaluation values and blinking them, the driver intuitively grasps whether the driving operation is good or bad and whether the evaluation direction is the acceleration side or the deceleration side Can be easily recognized. The display color of the model vehicle 10 expressing the low evaluation state and the display by the mark 12 are continued even if the evaluation value returns to a high state, and the original display is restored after a predetermined time (for example, about 2 seconds). As a result, the driver can grasp the evaluation of the past driving operation even if the driver does not always watch the display screen, and can effectively improve the fuel-saving driving skill.

  Further, as a response to the fact that the driver cannot always watch the display screen, when a good driving operation is continuously performed, a display action corresponding to the duration is performed. For example, when a state in which a driving operation evaluation value is high (good driving operation) continues with reference to previously stored vehicle image data, the model vehicle 10 is gradually expanded according to the duration. Alternatively, as shown in FIG. 5, the area 10 ′ around the model vehicle 10 is set as an area 10 ″ that blinks at a cycle according to the duration of good driving operation.

  Note that the display action by blinking may blink the model vehicle 10 itself or blink the entire region including the model vehicle 10. In addition, when the display action by enlargement or blink is deviated from a good driving operation, it immediately stops (abruptly returns to the original size or stops blink).

  Furthermore, in addition to the information presented to the driver by the display action of the vehicle image described above, when there is a good operation or a bad operation that should be noted during the traveling, the voice control unit 5 has the ID1 to ID1 as shown below. A phrase is selected based on the utterance condition of ID4, and a voice is output to the driver via the speaker 1c.

ID1: It is an utterance condition when the average of the driving operation evaluation value Eval (t) from the start of stopping until the set time exceeds the set value. For example, the following phrases are uttered.
"It's very good with a soft accelerator."
ID2: An utterance condition when the condition of ID1 is not achieved. For example, the following phrases are uttered.
“When you step from the brake to the accelerator, take a breath to improve fuel economy.”
ID3: It is an utterance condition when the accelerator opening is in a state equal to or greater than the set opening for the set time or longer. For example, the following phrases are uttered.
“I stepped on the accelerator too much. Good acceleration is good for fuel economy.”
ID4: An utterance condition when the driving operation evaluation value Eval (t) exceeds the set value for a set time or longer. For example, the following phrases are uttered.
"Good accelerator operation is good for fuel economy. Let's go at a constant speed in this condition."

  Thus, in the present embodiment, the driver can easily understand whether the current driving state is “acceleration”, “cruising”, or “deceleration” by the display action of the vehicle image. . In addition, it is possible to intuitively understand how much improvement should be made in order to perform fuel-saving driving operations that are optimal for each driving state after grasping which driving state it is. Fuel economy driving skills can be improved.

  In addition, the evaluation of driving operation is expressed not only by the display position of the vehicle image, but also by past evaluation values by the color of the vehicle image and marks added to the vehicle image, so the driver does not always watch the display screen. In addition, the evaluation of past driving operations can be grasped, and fuel-saving driving skills can be effectively improved.

  In addition, even if the driver is not always watching the screen, a display indicating that good driving operation is continued will stimulate the driver's willingness to save fuel and improve fuel saving driving skills effectively Can be made.

DESCRIPTION OF SYMBOLS 1 Vehicle information presentation apparatus 1a Controller 1b Display 1c Speaker 2 Driving | running state phase discrimination | determination part 3 Driving | operation operation evaluation part 4 Display control part 5 Voice control part 10 Model vehicle 12a Sweat mark 12b Musical note mark 12c Gas mark

Claims (7)

A vehicle information presentation device for presenting information related to driving of a vehicle to a driver,
An operation state phase determination unit for determining a phase to which the current operation state belongs based on a predetermined evaluation guideline;
A driving operation evaluation unit that evaluates the driving operation of the driver and calculates an evaluation value of the driving operation for each phase of the driving state;
The driving state phase determined by the driving state phase determination unit is specified by the display posture of the model vehicle displayed on the display, and the evaluation value calculated by the driving operation evaluation unit is specified by the display position of the model vehicle. A vehicle information presentation device comprising: a display control unit.   The vehicular information presentation device according to claim 1, wherein the display control unit changes a display color of the model vehicle according to the evaluation value.   3. The display control unit maintains a set time for the display color of the model vehicle set when the evaluation value is low, even when the evaluation value transits from a low state to a high state. The vehicle information presentation device described.   The vehicle display device according to any one of claims 1 to 3, wherein the display control unit adds a mark corresponding to the evaluation value to the model vehicle and causes the display to display the mark.   5. The vehicle according to claim 4, wherein the display control unit maintains the set time for the mark added when the evaluation value is low even when the evaluation value transits from a low state to a high state. Information presentation device.   6. The vehicle according to claim 1, wherein when the state where the evaluation value is high continues, the display control unit gradually expands the model vehicle according to the duration time thereof. Information presentation device.   The vehicle according to any one of claims 1 to 5, wherein when the state where the evaluation value is high continues, the display control unit blinks the periphery of the model vehicle in a cycle corresponding to the duration time. Information presentation device.

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