JP2016124347A - Display device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp a fuel economy improvement effect by drive which is performed by a driver while following a gear change indication, in a display device of a vehicle.SOLUTION: Control means (14) of a display device (12) comprises: traveling state detection means (27) which detects a traveling state of a vehicle; current gear stage detection means (28) which detects a current gear stage which is currently selected by a transmission (4); recommendation gear stage decision means (29) for deciding a recommendation gear stage which is favorable in fuel economy on the basis of the traveling state which is decided by the traveling state detection means (27); fuel loss index calculation means (30) which detects an index indicating a fuel loss caused by the fact that the current gear stage and the recommendation gear stage differ from each other; and display control means (31) which performs control so that the index indicating the fuel loss which is calculated by the fuel loss index calculation means (30) is displayed at a display part (35).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display device for a vehicle, and more particularly to a display device for a vehicle capable of prompting a driver to improve driving efficiency.

Some vehicles are equipped with a so-called gear shift indicator (GSI) that instructs selection of a gear position of a transmission suitable for improving fuel efficiency.
Examples of such vehicle display devices include the following prior art documents.

JP 2007-106195 A

  The driving advice system according to Patent Literature 1 calculates a ratio of a driver performing a shift change in accordance with a shift instruction, and performs a driving evaluation process for displaying the calculated ratio data on a display unit.

  However, in the above-mentioned Patent Document 1, it is difficult for the driver to grasp the fuel efficiency improvement effect when the driver follows the gear shift indicator shift instruction compared to when the driver does not follow the gear shift indicator shift instruction. There was a problem that the driver could not find the meaning to follow the gear shift indicator.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle display device that enables a driver to grasp the fuel efficiency improvement effect by driving in accordance with a shift instruction.

  The present invention relates to a vehicle equipped with a transmission capable of transmitting a driving force from a driving force source to driving wheels and capable of manual operation, and displaying a shift indicator with good fuel consumption for the driver of the vehicle. In a display device for a vehicle comprising a device, a traveling state detecting unit that detects a traveling state of the vehicle, a current gear step detecting unit that detects a current gear step that is currently selected by the transmission, and the traveling state detecting unit A recommended gear stage determining means for determining a recommended gear stage with good fuel consumption based on the running state detected by the vehicle, and a fuel loss index calculation for calculating an index indicating fuel loss due to the current gear stage differing from the recommended gear stage And a display control means for controlling to display an index indicating the fuel loss calculated by the fuel loss index calculating means on the display unit.

  Since the present invention displays an index indicating the fuel loss due to the current gear stage being different from the recommended gear stage, the driver can visually check the fuel loss when the driver does not follow the shift instruction, and the driver can The fuel efficiency improvement effect by driving according to the above can be grasped.

FIG. 1 is a system configuration diagram of a vehicle display device. (Example) FIG. 2 is a control block diagram of the display device. (Example) FIG. 3 is a flowchart of the fuel loss amount display (running) when the gear shift indicator (GSI) does not follow the shift instruction. (Example) FIG. 4 is a flowchart for displaying the fuel loss amount and the fuel loss ratio (when the ignition is off) when the gear shift indicator (GSI) is not obeying the shift instruction (Example). FIG. 5 is a flowchart for calculating the fuel consumption (Example). FIG. 6 is a flowchart for displaying the fuel consumption reduction effect ratio. (Example) FIG. 7 is a time chart for explaining the allowable delay time until the current gear position is changed and the delay time measured by the timer when calculating the fuel consumption reduction effect ratio. (Example) FIG. 8 is a flowchart for calculating the fuel consumption reduction effect ratio. (Example) FIG. 9 is a diagram showing a display state of the fuel loss amount. (Example) FIG. 10 is a diagram showing a display state of the fuel loss amount (including history) and the fuel loss ratio in one driving cycle (1DC). (Example) FIG. 11 is a diagram showing a display state of a fuel loss amount (including a change state) and a fuel loss ratio in one driving cycle (1DC). (Example) FIG. 12 is a diagram showing a display state of the fuel consumption reduction effect ratio. (Example)

  The present invention realizes the purpose of the driver to grasp the fuel efficiency improvement effect by driving according to the shift instruction by displaying an index indicating the fuel loss due to the current gear stage being different from the recommended gear stage.

1 to 12 show an embodiment of the present invention.
As shown in FIG. 1, a power plant 2 is mounted on the vehicle 1.
The power plant 2 includes an engine 3 as a driving force source that generates a driving force, and a transmission 4 with a clutch that is connected to the engine 3 and transmits the driving force of the engine 3. The transmission 4 includes a clutch 6 connected to the output shaft 5 of the engine 3. The clutch 6 is disposed between the engine 3 and the transmission 4, and is electrically and mechanically operated to release and connect, thereby cutting and transmitting the driving force from the engine 3 to the transmission 4.
The transmission 4 includes an input shaft 7 connected to the clutch 6, a drive gear 8 fixed to the input shaft 7, and a ring gear 9 that meshes with the drive gear 8. A drive shaft 10 is connected to the ring gear 9. Drive wheels 11 are attached to the drive shaft 10.
The transmission 4 transmits the driving force from the engine 3 to the drive wheels 11 and can be manually operated.

A display device 12 is mounted on the vehicle 1.
The display device 12 includes a display unit 35 including a shift indicator 13 that displays a shift indicator with good fuel consumption for the driver of the vehicle 1, and a control means (ECU) 14 connected to the shift indicator 13.
The control means 14 is connected to the engine 3 via the first CAN communication line 15 and controls the engine 3. That is, the control means 14 calculates the throttle opening, ignition timing, fuel injection amount, and the like based on signals from various sensors described later, and drives the actuators to control the engine 3.
The control means 14 is connected to the shift indicator 13 via the second CAN communication line 16 and controls the shift indicator 13.
As shown in FIG. 1, the control means 14 includes an intake pressure sensor 17, an intake air temperature sensor 18, an engine speed sensor 19, a vehicle speed sensor 20, a shift position sensor 21, an accelerator sensor 22, and a clutch sensor. 23 and an ignition switch (IG) 24 are connected.
The intake pressure sensor 17 detects the pressure of intake air supplied to the engine 3. The intake air temperature sensor 18 detects the temperature of intake air supplied to the engine 3. The engine speed sensor 19 detects the rotation of the crankshaft of the engine 3 as the engine speed. The vehicle speed sensor 20 detects the rotation of the output shaft of the transmission 4 as the vehicle speed. The shift position sensor 21 detects the shift position of the transmission 4. The accelerator sensor 22 can detect the depression state of the accelerator pedal 25 and can detect the driver request torque. The clutch sensor 23 detects the depression state of the clutch pedal 26. The ignition switch 24 is turned on / off when the driver operates a key to start / stop the engine 3.

As shown in FIG. 2, the control unit 14 includes a traveling state detection unit 27, a current gear stage detection unit 28, a recommended gear stage determination unit 29, a fuel loss index calculation unit 30, and a display control unit 31. .
The traveling state detection unit 27 detects the traveling state of the vehicle 1. The current gear detection means 28 detects the current gear that is currently selected by the transmission 4. The recommended gear stage determining unit 29 determines a recommended gear stage with good fuel efficiency based on the traveling state of the vehicle 1 detected by the traveling state detecting unit 27. The fuel loss index calculating means 30 calculates an index (fuel loss amount, fuel loss ratio) indicating fuel loss due to the current gear stage being different from the recommended gear stage. The display control unit 31 controls the display unit 35 to display an index indicating the fuel loss calculated by the fuel loss index calculating unit 30.

The fuel loss index calculating means 30 calculates a current gear stage fuel consumption amount that is a fuel consumption amount at the current gear stage and a recommended gear stage fuel consumption amount that is a fuel consumption amount when it is assumed that the gear position is changed to the recommended gear stage. The fuel loss amount calculation means uses the difference between the current gear stage fuel consumption amount and the recommended gear stage fuel consumption amount as the fuel loss amount.
Further, the fuel loss index calculating means 30 calculates the current gear speed fuel consumption that is the fuel consumption at the current gear and the recommended gear speed fuel consumption that is the fuel consumption when it is assumed that the gear is changed to the recommended gear. Calculate the difference between the current gear speed fuel consumption and the recommended gear fuel consumption as the fuel loss, and divide this fuel loss by the current gear fuel consumption or the recommended gear fuel consumption to calculate the fuel loss ratio. Is a fuel loss ratio calculating means for calculating

Further, as shown in FIG. 2, the control means 14 includes a timer 32, a shift instruction effect calculation means 33, and a memory (RAM) 34.
The timer 32 measures a delay time from when the driver is instructed to change to the recommended gear stage until the current gear stage is changed.
The shift instruction effect calculation means 33 calculates the fuel consumption based on the delay time measured by the timer 32 and the allowable delay time from when the driver is instructed to change to the recommended gear stage until the current gear stage is changed. The amount reduction effect ratio is calculated. In this case, the display control unit 31 controls the display unit 35 to display the fuel consumption reduction effect ratio calculated by the shift instruction effect calculation unit 33.
The memory 34 stores various types of information. The delay time (k) from when the driver is instructed to change to the recommended gear stage until the current gear stage is changed, by the timer 32 described later. The measured delay time (t) and the like are stored (see FIG. 7).

Next, display control according to this embodiment will be described.
FIG. 3 shows a flowchart of the fuel loss amount display (during traveling) when the gear shift indicator does not follow the shift instruction.
As shown in FIG. 3, when the program of the control means 14 is started (step A01), first, various signals are input (step A02), and the current gear stage is determined from various information such as the shift position, the vehicle speed, and the engine speed. (Step A03), and further, a recommended gear stage that is optimal for the fuel consumption of the engine 3 is determined from a preset gear stage map based on various information such as the current gear stage, driver required torque, vehicle speed, and engine speed (Step A04). ).
Then, the current gear stage fuel consumption (a) is calculated from various information such as the current engine speed, the current intake pressure, the current intake temperature, and the current vehicle speed (step A05).
Also, assuming that the gear has been shifted to the recommended gear determined in step A04, the recommended speed is determined based on various information such as the estimated engine speed, the estimated intake pressure, the estimated intake temperature, and the estimated vehicle speed. A gear stage fuel injection amount (b) is calculated (step A06).
Then, it is determined whether or not the current gear stage and the recommended gear stage are equal (current gear stage = recommended gear stage) (step A07).
If this step A07 is NO and the current gear stage and the recommended gear stage are not equivalent, the current gear stage fuel consumption (a) and the recommended gear stage fuel consumption (b) are calculated (subtracted) ( a−b), the current fuel loss amount (c) is calculated (c = a−b) (step A08).
Then, the fuel loss amount is updated by adding the calculated current fuel loss amount (c) to the total fuel loss amount (d) so far. That is, the fuel loss amount (d) is calculated by d = dn ^-1 + c (step A09).
On the other hand, if step A07 is YES and the current gear and the recommended gear are equal, the fuel loss amount (d) is reset (step A10).
After the process of step A10 or after the process of step A09, the fuel loss amount (d) signal is output to the display unit 35 (step A11), and the fuel loss amount (d) is output to the display unit 35. Display (see FIG. 9) (step A12).
Thereafter, this program is returned (step A13).

Next, the display of the fuel loss amount and the fuel loss ratio (when the ignition is turned off) when the gear shift indicator (GSI) is in accordance with the shift instruction will be described with reference to the flowchart of FIG.
As shown in FIG. 4, when the ignition switch 24 is turned on and the program of the control means 14 is started (step B01), the memory 34 is first cleared (step B02), and the fuel consumption is calculated (step B02). Step B03). The calculation of the fuel consumption amount in step B03 will be specifically described along the flowchart of FIG.
Then, it is determined whether or not the ignition switch 24 is off (step B04). If step B04 is NO, the process returns to step B03.
When this step B04 is YES, after the ignition switch 24 is turned off, the fuel loss amount (Floss) resulting from the operation without shifting to the recommended gear stage is calculated from the current gear stage fuel consumption (FAct) and the recommended gear stage. It is calculated from the fuel consumption amount (FEst), that is, it is calculated by subtracting the recommended gear stage fuel consumption amount (FEst) from the current gear stage fuel consumption amount (FAct) (FLoss = FAct−FEst) (step B05).
Then, the fuel loss ratio (Fper) resulting from the operation without shifting to the recommended gear stage is calculated from the fuel loss amount (Floss) and the current gear stage fuel consumption amount (Fact), that is, the fuel loss amount ( (Floss) is calculated by dividing the current gear stage fuel consumption (FAct) (Fper = (FLoss / FAct) × 100) (step B06). The fuel loss ratio (Fper) can also be calculated by dividing the fuel loss amount (Floss) by the recommended gear stage fuel consumption amount (FEst).
Thereafter, data for the past specified number of times is called from the memory 34 for display on the display unit 35. Further, the current data (fuel loss amount, fuel loss ratio) is stored in the memory 34 (step B07).
Then, the display of the fuel loss amount (Floss) and the fuel loss ratio (Fper) in one driving cycle (1DC) is started on the display unit 35 (see FIGS. 10 and 11) (step B08). FIG. 10 shows the display of the fuel loss amount (including history) and the fuel loss amount ratio. FIG. 11 shows the display of the fuel loss amount (including the change state) and the fuel loss amount ratio.
Then, the timer 32 calculates the display duration (Tsh) (Tsh = Tsh ++) (step B09).
After the ignition switch 24 is turned off, it is determined whether or not the display duration (Tsh) exceeds a specified time (threshold) (Tsh> threshold) (step B10). If step B10 is NO, the process returns to step B08.
If this step B10 is YES and the duration (Tsh) exceeds the specified time (threshold) after the ignition switch 24 is turned off (Tsh> threshold), one driving cycle displayed on the display unit 35 (Tsh> threshold) The display of the fuel loss amount (Floss) and the fuel loss ratio (Fper) at 1DC) is terminated (step B11).
Thereafter, this program is ended (step B12).

Calculation of the fuel consumption in step B03 in FIG. 4 will be described with reference to the flowchart in FIG.
As shown in FIG. 5, when the program of the control means 14 starts (step C01), first, various signals are input (step C02).
And the present gear stage currently used for driving | running | working is determined from various information, such as a vehicle speed and an engine speed (step C03). In the determination of the current gear stage in step C03, information on the current gear stage can be obtained from each gear switch.
Further, based on various information such as the vehicle speed, the current gear stage, and the driver required torque, the recommended gear stage is determined from a preset gear stage map (step C04).
Then, it is determined whether or not a predetermined shift instruction determination condition is satisfied (step C05).
If step C05 is NO, the shift instruction display maintaining time in the timer 32 is cleared (Tind = 0) (step C06).
On the other hand, when this step C05 is YES, the current gear stage and the recommended gear stage do not coincide with each other, and a shift instruction display, that is, a gear stage higher than the current gear stage is recommended, or more than the current gear stage. The condition for permitting the display to recommend the lower gear stage is established, and the shift instruction display duration (Tind) is incremented while the shift instruction is displayed on the shift indicator 13 (Tind = Tind ++) (step C07).
Then, it is determined whether or not the shift instruction display duration (Tind) exceeds a specified time (threshold) (Tind> threshold) (step C08).
If this step C08 is YES and the shift instruction display duration (Tind) exceeds the specified time (threshold) (Tind> threshold), the fuel consumption (Inj) is integrated and the current gear stage fuel consumption (FAct) is calculated (FAct = Inj + FAct (previous value) (step C09)) Here, the driver starts the calculation after the shift instruction display duration (Tind) exceeds the specified time (threshold). This is to provide a time margin for recognizing the shift instruction display and completing the shift operation.
Then, assuming that the gear has been shifted to the recommended gear stage, the estimated fuel injection amount (InjEst) at the time of selecting the recommended gear stage is calculated from the driver required torque, the engine speed estimated when traveling at the recommended gear stage, etc. (Step C10).
Thereafter, while the shift instruction display continuation time (Tind) exceeds the specified time (threshold) (Tind> threshold), the estimated fuel injection amount (InjEst) is integrated to calculate the recommended gear stage fuel consumption (FEst). (FEst = InjEst + FEst (previous value)) (step C11).
After the process of step C11, after the process of step C06, or when the step C08 is NO, the program is returned (step C12).

FIG. 6 shows a flowchart for displaying the fuel consumption reduction effect ratio after the ignition switch 24 is turned off.
As shown in FIG. 6, when the program of the control means 14 is started (step D01), it is first determined whether or not the ignition switch (IG) 24 is turned off (step D02). If this step D02 is NO, this determination is continued.
When this step D02 is YES, the delay time (t) and count (X) stored from the memory 34 are read out (step D03). That is, as shown in FIG. 7, the memory 34 measures the allowable delay time (k) from when the driver is instructed to change to the recommended gear to the current gear is changed, by the timer 32. The delay time (t) is stored.
Next, the fuel consumption reduction effect ratio (S) is calculated (step D04). The calculation of the fuel consumption reduction effect ratio (S) in step D04 will be specifically described along the flowchart of FIG.
The calculated fuel consumption reduction effect ratio (S) is displayed on the display unit 35 (see FIG. 12) to notify the driver (step D05).
Thereafter, the program is ended (step D06).

The calculation of the fuel consumption reduction effect ratio (S) in step D04 of FIG. 6 will be described with reference to the flowchart of FIG.
As shown in FIG. 8, when the program of the control means 14 is started (step E01), first, various signals are input (step E02), the current gear stage is determined (step E03), and the current gear stage, The recommended gear stage is determined based on a preset gear stage map from the driver required torque, vehicle speed, engine speed, etc. (step E04).
Then, it is determined whether or not the current gear stage and the recommended gear stage are different (current gear stage ≠ recommended gear stage) (step E05).
If this step E05 is YES, a shift instruction is displayed on the shift indicator 13 (step E06).
Thereafter, in order to measure the delay time (t), the timer 32 starts counting (step E07), and the count X is obtained by count X = X + 1 (step E08). That is, in this step E08, the count of the number of times of giving a gear change instruction is increased by one.
Then, it is determined whether or not there has been a shift operation by the driver (step E09). If this step E09 is NO, this determination is continued.
If this step E09 is YES, the timer 32 finishes counting (step E10).
Thereafter, the measured delay time (t) and count (X) are stored in the memory 34 (step E11).
After the processing of step E11 or when the step E05 is NO, the program is returned (step E12).

The fuel consumption reduction effect ratio (S) is calculated by the following equation.
S = {1- (Σt / k × X)} × 100 × b
S: Fuel consumption reduction effect ratio [%] (however, up to 100%)
k: Allowable time [s]
t: Delay time [s]
X: Number of shift instructions [times]
b: Correction coefficient [−]
By calculating the fuel consumption reduction effect ratio (S), the fuel consumption reduction effect ratio (S) is increased by the correction coefficient (b), and the fuel consumption reduction effect ratio (S) is too small for the driver. ) Can be prevented. Further, by adjusting the allowable time (k), it is possible to display an appropriate fuel consumption reduction effect ratio (S) to the driver. Furthermore, by providing the delay time (t), it is possible to provide a time margin until the driver notices the shift instruction.

As a result, in this embodiment, the display device 12 includes a traveling state detection unit 27 that detects the traveling state of the vehicle 1, a current gear step detection unit 28 that detects the current gear step that is currently selected by the transmission 4, and The recommended gear stage determining means 29 for determining a recommended gear stage with good fuel efficiency based on the traveling state detected by the traveling state detecting means 27, and the index indicating the fuel loss due to the current gear stage differing from the recommended gear stage are calculated. And a display control means 31 for controlling to display an index indicating the fuel loss calculated by the fuel loss index calculation means 30.
With such a configuration, since the index indicating the fuel loss due to the current gear stage being different from the recommended gear stage is displayed, the fuel loss when the driver does not follow the gear shift instruction can be visually confirmed. For this reason, the driver can grasp the fuel efficiency improvement effect by the driving according to the shift instruction.
Further, the fuel loss index calculating means 30 calculates the current gear speed fuel consumption that is the fuel consumption at the current gear and the recommended gear speed fuel consumption that is the fuel consumption when it is assumed that the gear is changed to the recommended gear. The fuel loss amount calculating means calculates and calculates a difference between the current gear stage fuel consumption amount and the recommended gear stage fuel consumption amount as a fuel loss amount.
With such a configuration, since an index indicating fuel loss is displayed as the amount of fuel loss, the driver can easily understand.
Further, the fuel loss index calculating means 30 calculates the current gear speed fuel consumption that is the fuel consumption at the current gear and the recommended gear speed fuel consumption that is the fuel consumption when it is assumed that the gear is changed to the recommended gear. Calculate the difference between the current gear speed fuel consumption and the recommended gear fuel consumption as the fuel loss, and divide the fuel loss by the current gear fuel consumption or the recommended gear fuel consumption to obtain the fuel loss ratio. It is a fuel loss ratio calculation means for calculating.
With such a configuration, since an index indicating fuel loss is displayed as a fuel loss ratio, it is easy for the driver to grasp.
Furthermore, the control means 14 measures the delay time from the time when the driver is instructed to change to the recommended gear to the time when the current gear is changed, and the driver is made to change to the recommended gear. Shift instruction effect calculation means 33 for calculating a fuel consumption reduction effect ratio based on the allowable delay time from the instruction until the current gear position is changed and the delay time measured by the timer 32 is provided. In this case, the display control unit 31 controls the display unit 35 to display the fuel consumption reduction effect ratio calculated by the shift instruction effect calculation unit 33.
With such a configuration, since the charge consumption reduction effect ratio is displayed, the fuel consumption reduction effect ratio when the driver follows the shift instruction can be visually confirmed. For this reason, the driver can grasp the fuel efficiency improvement effect by the driving according to the shift instruction.

  The display device according to the present invention can be applied to various vehicles.

1 vehicle 2 power plant 3 engine (drive power source)
DESCRIPTION OF SYMBOLS 4 Transmission 6 Clutch 11 Drive wheel 12 Display apparatus 13 Shift indicator 14 Control means 17 Intake pressure sensor 18 Intake temperature sensor 19 Engine speed sensor 20 Vehicle speed sensor 21 Shift position sensor 22 Acceleration sensor 23 Clutch sensor 24 Ignition switch 27 Running state Detection means 28 Current gear speed detection means 29 Recommended gear speed determination means 30 Fuel loss index calculation means 31 Display control means 32 Timer 33 Shift instruction effect calculation means 34 Memory 35 Display unit

Claims (4)

  A vehicle equipped with a transmission that transmits a driving force from a driving force source to driving wheels and that can be manually operated, and includes a shift indicator that displays a shift indicator with good fuel efficiency to the driver of the vehicle. In the display device, a traveling state detection unit that detects a traveling state of the vehicle, a current gear step detection unit that detects a current gear step that is currently selected by the transmission, and a detection that is detected by the traveling state detection unit Recommended gear stage determining means for determining a recommended gear stage having good fuel efficiency based on a running state; fuel loss index calculating means for calculating an index indicating fuel loss due to the current gear stage being different from the recommended gear stage; and A display device for a vehicle, comprising: a display control unit that controls to display an index indicating the fuel loss calculated by the fuel loss index calculating unit on the display unit.   The fuel loss index calculating means includes a current gear stage fuel consumption amount that is a fuel consumption amount in the current gear stage and a recommended gear stage fuel consumption amount that is a fuel consumption amount when it is assumed that the recommended gear stage is changed. 2. The vehicle display device according to claim 1, wherein the vehicle display device is a fuel loss amount calculating means that calculates and calculates a difference between the current gear stage fuel consumption amount and the recommended gear stage fuel consumption amount as a fuel loss amount.   The fuel loss index calculating means includes a current gear stage fuel consumption amount that is a fuel consumption amount in the current gear stage and a recommended gear stage fuel consumption amount that is a fuel consumption amount when it is assumed that the recommended gear stage is changed. The difference between the current gear stage fuel consumption and the recommended gear stage fuel consumption is calculated as a fuel loss amount, and the fuel loss amount is divided by the current gear stage fuel consumption amount or the recommended gear stage fuel consumption amount. The vehicle display device according to claim 1, wherein the display device is a fuel loss rate calculating means for calculating a fuel loss rate.   A vehicle equipped with a transmission that transmits a driving force from a driving force source to driving wheels and that can be manually operated, and includes a shift indicator that displays a shift indicator with good fuel efficiency to the driver of the vehicle. In the display device, a traveling state detection unit that detects a traveling state of the vehicle, a current gear step detection unit that detects a current gear step that is currently selected by the transmission, and a detection that is detected by the traveling state detection unit Recommended gear stage determination means for determining a recommended gear stage with good fuel efficiency based on the driving state, and measuring the delay time from when the driver is instructed to change to the recommended gear stage until the current gear stage is changed And a fuel consumption reduction effect based on the delay time measured by the timer and the allowable delay time from the time when the driver is instructed to change to the recommended gear stage until the current gear stage is changed Percentage A vehicle display device comprising: a shift instruction effect calculating means for outputting; and a display control means for controlling the fuel consumption reduction effect ratio calculated by the shift instruction effect calculating means to be displayed on a display unit. .

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