JP5119086B2 - Eco driving support device - Google Patents

Description

  The present invention relates to a technology for supporting a driver's eco-driving.

In recent years, an eco-driving support device that supports a driver's eco-driving from the viewpoint of environmental protection has been mounted on vehicles. The eco-drive support device determines whether or not the vehicle is in a driving state with good fuel efficiency (hereinafter referred to as an eco-driving state) from the amount of accelerator depression, engine and transmission efficiency, and driving speed and acceleration. To do. And when it determines with it being in an eco-drive state, LED (Light Emitting Diode) etc. are lighted. This display guides the driving operation of the driver so that the driving state of the vehicle becomes the eco driving state. Hereinafter, the display for guiding the driving operation of the driver to the eco driving is referred to as eco navigation display.
Further, in Patent Document 1, the target fuel consumption displayed by a mark and the instantaneous fuel consumption displayed by a bar graph are indicated by a common index so that the quality of the instantaneous fuel consumption with respect to the target fuel consumption can be determined instantaneously.

  Patent Document 2 proposes a correction method in the case where an error occurs between the fuel consumption related information displayed on the display unit and the actual fuel consumption related information.

JP 2000-205925 A JP 2005-307752 A

When the above-described eco-driving support device is to be mounted on a vehicle provided with an instantaneous fuel consumption meter that displays instantaneous fuel consumption, there may be a difference between the instantaneous fuel consumption meter display and the eco-navi display.
The eco-navigation display provided by the eco-driving support device shows how to perform an operation to improve the eco-driving state, so an instantaneous fuel consumption meter display that displays the fuel consumption of a very short moment The display may be off.
If there is a deviation in these displays despite the information supporting the same eco-driving, the driver does not know which display should be used for driving, which causes stress.
Although a technique for correcting an error between actual fuel consumption (actual fuel consumption) and fuel consumption related information as in Patent Document 2 has been proposed, disclosure of a technique for correcting a display shift between the eco-navigation display and the fuel consumption information display There is no.

  The present invention has been made in view of the above circumstances, and provides an eco-driving support device that can reduce display inconsistency between a display for determining whether or not an eco-driving operation is performed and a display of fuel consumption information. With the goal.

In order to achieve such an object, the eco-driving support device of the present invention determines driving operation state information indicating a state of driving operation of a vehicle by a driver and whether or not the driving operation of the driver is an eco-driving operation. An eco-driving operation determining means for determining whether or not the driving operation is an eco-driving operation based on an eco-determining threshold value to be determined; Eco driving operation display control means for controlling display so as to display results, fuel consumption display control means for controlling display so as to display fuel efficiency information of the vehicle, and eco driving displayed by the eco driving operation display control means And a display correction unit that corrects fuel consumption information displayed by the fuel consumption display control unit based on a display state indicating whether the operation is performed.
According to the present invention, the fuel consumption information displayed by the fuel consumption display control unit is corrected based on the display state of whether or not the operation is an eco-driving operation. It is possible to reduce display inconsistency that occurs when displaying information.

  In the eco-driving support device having the above-described configuration, the eco-driving operation display means performs display based on the driving operation state information when the vehicle is in a traveling state when the vehicle is in a traveling state. The fuel consumption display control means controls the display so that when the vehicle is in a traveling state, the fuel consumption information is displayed within a predetermined period when the vehicle is in a traveling state. You may control.

  In the eco-driving support device having the above-described configuration, when the fuel efficiency information is changed in a direction different from a display state as to whether or not the display correction unit displays an eco-driving operation displayed by the eco-driving operation display control unit. The fuel consumption information displayed by the fuel consumption display control means may be corrected.

  In the eco-driving support device having the above-described configuration, when the fuel efficiency information is changed in a direction different from a display state as to whether or not the display correction unit displays an eco-driving operation displayed by the eco-driving operation display control unit. The fuel consumption information displayed by the fuel consumption display control means may be corrected so that a change in the fuel consumption information is reduced.

  In the eco-driving support device configured as described above, based on driving state information representing a driving state of the vehicle and an eco determination threshold value for distinguishing whether the driving state of the vehicle is an eco-driving state, Driving state eco degree acquisition means for obtaining an eco degree of driving state, driving state eco degree display control means for controlling display so as to display the eco degree of driving state acquired by the driving state eco degree acquisition means, The fuel consumption display control means for controlling the display so as to display the fuel consumption information of the vehicle, and the fuel consumption information displayed by the fuel consumption display control means are corrected based on the eco degree of the driving state displayed by the eco driving state display control means. And a display correction unit.

  According to the present invention, it is possible to reduce the display mismatch between the determination result of whether or not the operation is an eco-driving operation and the display of the fuel consumption information.

  The best embodiment of the present embodiment will be described with reference to the accompanying drawings.

First, the configuration of the present embodiment will be described with reference to FIG. Note that the definition of eco in this specification has both economy and ecology meanings.
Economy means saving fuel (saving fuel) by reducing fuel consumption. Ecology means to suppress the consumption of fossil fuels or to suppress the generation and emission of harmful substances and carbon dioxide caused by the combustion of fossil fuels.

An eco-driving support system 1A shown in FIG. 1 has a system configuration in which a powertrain ECU (Electronic Control Unit) 10 that controls an engine and a transmission and a meter ECU 20 that controls display on an indicator panel 30 are connected by an in-vehicle communication bus. Have. The power train ECU 10 and the meter ECU 20 communicate using a communication protocol such as CAN (Controller Area Network), for example.
FIG. 1 shows a powertrain ECU 10 and a meter ECU 20 as ECUs connected to the in-vehicle communication bus. In addition, a plurality of ECUs are connected to the in-vehicle communication bus. In addition, an arrow indicated by a solid line in FIG. 1 represents a physical connection state of signals, and an arrow indicated by a dotted line in FIG. 1 represents a data flow.

The power train ECU 10 inputs sensor signals from the various sensors 2 and controls the engine and the transmission based on the input sensor signals.
As sensor signals input from the various sensors 2 by the powertrain ECU 10, an accelerator opening (%) measured by an accelerator opening sensor (not shown) and a vehicle speed (km / h) measured by a vehicle speed sensor (not shown). , The intake air amount measured by the intake air amount sensor (the amount of air flowing into the intake passage of the engine), the air / fuel ratio measured by the air / fuel ratio sensor, the shift position detected by the shift position sensor (not shown), The state of the switch which switches control modes (power mode, sports mode, etc.) etc. are mentioned.

The powertrain ECU 10 includes an engine control unit 11 that controls the engine, a transmission control unit 12 that controls the transmission, and an eco determination unit 13 that determines whether the driving state of the vehicle is in an eco driving state. is doing.
The engine control unit 11 acquires sensor signals such as an intake air amount measured by an intake air amount sensor (included in various sensors 2) and an air-fuel ratio measured by an air-fuel ratio sensor (included in various sensors 2). Then, the control command values such as the fuel injection amount and the ignition timing are calculated based on the acquired sensor signal. Further, the actuator 3 such as an injector or an ignition coil is controlled based on the calculation result.
In addition to the shift position detected by the shift position sensor (included in the various sensors 2), the transmission control unit 12 takes in state quantities representing the driving state of the vehicle such as the vehicle speed, throttle opening, and engine speed, Control of shifting of an automatic transmission (not shown) is controlled in accordance with the state quantity.

In the engine control unit 11, an instantaneous fuel consumption calculation unit 111 that calculates the instantaneous fuel consumption of the vehicle is provided.
The instantaneous fuel consumption calculation unit 111 calculates the instantaneous fuel consumption of the vehicle from the vehicle speed measured by the vehicle speed sensor and the fuel injection time of the injector.
The instantaneous fuel consumption calculation unit 111 inputs a pulse signal corresponding to the number of wheel rotations output from the vehicle speed sensor. The instantaneous fuel consumption calculation unit 111 calculates a travel distance from the number of pulses of the input pulse signal and the distance per unit pulse. The distance per unit pulse is stored in the memory, and is read from the memory when the instantaneous fuel consumption calculation unit 111 calculates the travel distance.
Further, the instantaneous fuel consumption calculation unit 111 acquires the fuel injection time calculated by the engine control, and calculates the fuel injection amount from the injection amount per unit time. The injection amount per unit time is also stored in the memory, and is read from the memory when the instantaneous fuel consumption calculation unit 111 calculates the fuel injection amount. The instantaneous fuel consumption calculation unit 111 calculates the instantaneous fuel consumption from the calculated travel distance and the fuel injection amount, and notifies the eco judgment unit 13 of the calculated instantaneous fuel consumption. The instantaneous fuel consumption is notified to the eco judgment unit 13 as a powertrain control state signal. In addition, the power train state control signal transmitted from the engine control unit 11 or the transmission control unit 12 to the eco judgment unit 13 includes a signal indicating the control state of the engine or transmission.

The eco judgment unit 13 calculates an eco driving state quantity representing the eco degree of the driving state of the vehicle based on the state quantity representing the driving state of the vehicle (details of the eco driving state quantity will be described later). The calculated eco-drive state quantity is notified to the meter ECU 20 as an eco-state signal.
Further, the eco judgment unit 13 corrects the instantaneous fuel consumption included in the powertrain control state signal in accordance with the eco driving state amount representing the eco driving state of the vehicle (details of this correction will be described later). The corrected instantaneous fuel consumption is transmitted to the meter ECU 20 as an eco state signal.

The meter ECU 20 is an ECU that controls the display of the indicator panel 30. In particular, in this embodiment, the eco-operating state quantity indicating the eco degree of the driving state of the vehicle is acquired from the eco-determining unit 13, and the eco-driving state quantity is obtained. The display of the eco lamp 50 is displayed on the eco display unit 31 of the indicator panel 30 based on the above. Also, the instantaneous fuel consumption information included in the eco state signal is acquired from the eco determination unit 13 and the instantaneous fuel consumption display 60 (see FIG. 4) is displayed on the eco display unit 31.
The indicator panel 30 is provided with an eco display unit 31 for displaying information indicating whether or not the driving state of the vehicle is in the eco driving state. Based on the control of the notification control unit 21, the eco display unit 31 displays an eco lamp 50 display and an instantaneous fuel consumption display 60.

FIG. 2 shows a hardware configuration of the ECU (powertrain ECU 10, meter ECU 20).
As shown in FIG. 2, in the ECU 10 (20), a ROM 42 storing a program for realizing control processing by the ECU 10 (20), and a central processing unit that reads and executes a program stored in the ROM 42. A (CPU) 41, a RAM 43 for storing temporary data used when executing the program, a data input / output unit 44, and the like are provided.
The ROM 42 of the powertrain ECU 10 stores a program for displaying eco-navigation display and fuel consumption information on the eco-display unit 31. When the CPU 41 of the powertrain ECU 10 reads this program and performs calculation, the eco-driving operation determination means, the eco-driving operation display control means, the fuel consumption display control means, the display correction means, and the driving state eco-degree acquisition of the present invention are obtained. Means and a driving degree display control means. The processing procedure of the eco judgment unit 13 in the powertrain ECU 10 including these means will be described in detail later with reference to a flowchart.

Next, the eco-driving state quantity calculated by the eco judgment unit 13 will be described.
First, the eco judgment unit 13 measures the current vehicle speed (km / h) of the vehicle measured by the vehicle speed sensor (included in the various sensors 2) and the accelerator opening sensor (included in the various sensors 2). The accelerator opening (%) is input as a state quantity indicating the state of the vehicle (the information corresponds to driving operation state information indicating the state of the driving operation of the vehicle by the driver).

Next, the eco judgment unit 13 refers to the eco judgment threshold map shown in FIG. This threshold value is called an eco determination threshold value).
In the eco determination threshold value map, the vehicle speed of the vehicle and the determination threshold value of the accelerator opening for determining whether or not the vehicle is in the eco driving state at the vehicle speed are stored in association with each other. In the eco determination threshold map shown in FIG. 3, the accelerator opening (%) is represented on the vertical axis, and the vehicle speed (km / h) is represented on the horizontal axis. Note that the eco driving state means, for example, driving with good fuel consumption determined from the eco determination threshold value.
When the eco judgment unit 13 obtains the eco judgment threshold value from the current vehicle speed by referring to the eco judgment threshold map, the eco judgment threshold value measured by the accelerator opening sensor is calculated with the obtained eco judgment threshold value. Divide and multiply the divided value by 100 to calculate the eco-driving state amount (%) (corresponding to the driving state information representing the driving state of the vehicle of the present invention). The calculation formula (1) for the eco-drive state quantity is shown below.
Eco-drive state amount = ((current accelerator opening / eco-judgment threshold) x 100) (%) (1)

  Next, the eco determination unit 13 determines whether or not the driving state of the vehicle is in the eco driving state from the calculated eco driving state amount. If the eco-driving state quantity is 100% or less, it can be determined that the driving state of the vehicle is in the eco-driving state. Further, if the eco-driving state quantity is larger than 100%, it can be determined that the driving state of the vehicle is in the non-eco-driving state. The eco judgment unit 13 includes the judgment result of the judged eco driving in the eco state signal and transmits it to the meter ECU 20.

4A and 4B show an example of the display of the eco lamp 50 displayed on the eco display unit 31 and the display 60 of the instantaneous fuel consumption. It should be noted that the display of the eco lamp 50 corresponds to the display of whether or not it is an eco driving operation of the present invention, and the instantaneous fuel consumption display 60 corresponds to the display of fuel consumption information.
The display of the eco lamp 50 is a display of a lamp such as an LED that is lit when the eco driving state quantity is smaller than 100%.
In addition, the instantaneous fuel consumption display 60 is a display in which the instantaneous fuel consumption calculated by the instantaneous fuel consumption calculation unit 111 is classified for each predetermined fuel consumption. Note that the instantaneous fuel consumption display 60 may be a bar display as shown in FIG. 4B, or a momentary moment (not shown), in addition to the display displayed separately for each predetermined fuel consumption shown in FIG. The fuel consumption may be displayed as a digital value.

The eco judgment unit 13 corrects the instantaneous fuel consumption in accordance with the display of the eco lamp 50 so that inconsistency does not occur between the display of the eco lamp 50 and the display 60 of the instantaneous fuel consumption.
When the display state of the eco lamp 50 indicates the eco driving state and the instantaneous fuel consumption can be determined as the low fuel consumption state, the instantaneous fuel consumption display 60 is displayed in a higher fuel consumption state than the actual instantaneous fuel consumption. When the display state of the eco lamp 50 indicates the non-eco driving state and the instantaneous fuel consumption can be determined to be the high fuel consumption state, the instantaneous fuel consumption display 60 is displayed in a fuel consumption state lower than the actual instantaneous fuel consumption.

Specifically, when the eco judgment unit 13 determines that the vehicle is in the eco driving state from the eco driving state quantity, the eco judgment unit 13 performs correction for suppressing the decrease in instantaneous fuel consumption as shown in FIG. Further, when the eco judgment unit 13 determines that the vehicle is in the non-eco driving state from the eco driving state quantity, the eco judgment unit 13 performs correction for suppressing an increase in instantaneous fuel consumption as shown in FIG.
For example, the correction of the instantaneous fuel consumption by the first-order lag smoothing correction is performed by correcting the constant value in the equation whose transfer function is expressed by the following equation (2).

なお、式（２）に示す［ｓ］はラプラス変換におけるラプラス変数（ラプラス演算子）を表す。
図６には、瞬間燃費の入力値と、一次遅れなましによる補正後の瞬間燃費とを示す。図６の一点鎖線が瞬間燃費の入力値を示し、実線が一次遅れなましによる補正後の瞬間燃費を示す。なお、図６に示すｔ１〜ｔ２の区間と、ｔ３〜ｔ４の区間とで、式（２）の定数値を変更する。

In addition, [s] shown in Formula (2) represents a Laplace variable (Laplace operator) in Laplace transform.
FIG. 6 shows the input value of the instantaneous fuel consumption and the instantaneous fuel consumption after correction by the first-order delay smoothing. The one-dot chain line in FIG. 6 shows the input value of the instantaneous fuel consumption, and the solid line shows the instantaneous fuel consumption after correction by smoothing the first order. In addition, the constant value of Formula (2) is changed with the area of t1-t2 shown in FIG. 6, and the area of t3-t4.

  When correction is performed by rate limit processing, the transfer function is corrected by changing a constant value in an expression represented by the following expression (3).

FIG. 7 shows the input value of the instantaneous fuel consumption and the instantaneous fuel consumption after correction by the rate limit process.
The change in the instantaneous fuel consumption in the t5 to t6 section and the t7 to t8 section shown in FIG. The instantaneous fuel efficiency is corrected by changing the constant value included in the equation (3) representing the inclination. The unit of the constant value is [msec].

Next, the processing procedure of the eco judgment unit 13 will be described.
First, the processing procedure of the eco judgment unit 13 for displaying the eco lamp 50 and the instantaneous fuel consumption display 60 on the eco display unit 31 of the indicator panel 30 will be described with reference to the flowchart shown in FIG.
The eco judgment unit 13 first inputs sensor signals from the various sensors 2 as state quantities representing the state of the vehicle. Here, an accelerator opening measured by an accelerator opening sensor (included in various sensors 2) and a vehicle speed measured by a vehicle speed sensor (included in various sensors 2) are input as sensor signals. When the sensor signal is input, the eco determination unit 13 determines whether the data input as the sensor signal is correct data (step S1). For example, when the same data is continuously input for a predetermined time or more, it is determined that a sticking abnormality has occurred in the various sensors 2.
If it is determined that the data is not correct data (step S1 / NO), the eco judgment unit 13 calculates 0% as the eco driving state amount at the time of failure of the various sensors 2 (step S9).

If it is determined that the data is correct data (step S1 / YES), the eco determination unit 13 determines whether or not the driving state of the vehicle is in a state where an eco navigation display can be provided (step S2). When the shift lever is in the back or parking position, or when a signal to turn on the power switch is input, it is not possible to display the appropriate eco-navigation, or the user is not requesting the display of eco-driving information Therefore, it is determined that the eco-navigation display is not possible.
When the eco judgment unit 13 determines that the eco navigation display is not possible (step S2 / NO), it calculates 0% as the eco driving state amount at the time of exclusion (step S10).

  Next, the eco judgment unit 13 refers to the eco judgment threshold map shown in FIG. 3 to obtain the eco judgment threshold from the current vehicle speed of the vehicle (step S3). The eco judgment unit 13 holds the map shown in FIG. 3, and obtains the eco judgment threshold value of the accelerator opening from the vehicle speed measured by the various sensors 2.

Next, the eco judgment unit 13 calculates the eco driving state quantity from the eco judgment threshold obtained in step S3 and the current accelerator opening measured by the accelerator opening sensor (included in the various sensors 2). (Step S4). The eco-driving state quantity can be obtained by the above-described equation (1).
When the eco-judgment unit 13 obtains the eco-drive state quantity, the eco-judgment unit 13 determines whether the eco lamp 50 is turned on or off from the obtained eco-drive state quantity (step S4). That is, if the eco-driving state amount is 100% or less, it is determined that the eco lamp 50 is lit because the eco-driving state is present. If the eco-drive state amount is greater than 100%, it is determined that the eco-lamp 50 is turned off because the non-eco-drive state.

  Next, the eco determination unit 13 acquires the instantaneous fuel consumption from the engine control unit 11 and corrects the acquired instantaneous fuel consumption according to the lighting state of the eco lamp 50. Details of this processing will be described later with reference to the flowchart shown in FIG.

Next, the eco determination unit 13 determines whether or not the vehicle is currently stopped (step S6). Based on the vehicle speed input from the vehicle speed sensor (included in the various sensors 2), the eco determination unit 13 determines whether or not the vehicle is stopped. For example, when the vehicle speed falls below 2 km / h, it is determined that the vehicle is in a stopped state, and when the vehicle speed exceeds 4 km / h, it is determined that the vehicle is in a traveling state. Further, when the vehicle speed is between 2 km / h and 4 km / h, the stop determination is not performed immediately, and thereafter, the vehicle waits until there is a change in the vehicle speed.
If it is determined that the vehicle is in a stopped state (step S6 / YES), the eco judgment unit 13 calculates 0% as the eco driving state amount when the vehicle is stopped (step S11).

  If it is determined that the vehicle is not in a stopped state (step S6 / NO), the eco judgment unit 13 determines the notification content to be notified to the meter ECU 20 (step S7). The eco judgment unit 13 notifies the meter ECU 20 of an eco state signal including information on whether the eco lamp 50 is turned on or off, and the corrected instantaneous fuel consumption information. The meter ECU 20 turns on or off the eco lamp 50 based on the eco state signal notified by the eco judgment unit 13 (step S8). Further, the meter ECU 20 controls the instantaneous fuel consumption display 60 based on the eco state signal (step S8).

Next, details of step S5 shown in FIG. 8 will be described with reference to the flowchart shown in FIG.
First, the eco judgment unit 13 acquires the instantaneous fuel consumption calculated by the instantaneous fuel consumption calculation unit 111 (step S21).

  Next, the eco judgment unit 13 acquires the value of the instantaneous fuel consumption calculated last time from the RAM 43. The eco determination unit 13 that acquired the previous instantaneous fuel consumption stores the current instantaneous fuel consumption acquired from the instantaneous fuel consumption calculation unit 111 in the RAM 43 (step S23).

  Next, the eco judgment unit 13 compares the current instantaneous fuel consumption with the previous instantaneous fuel consumption to determine whether or not the instantaneous fuel consumption has changed to a decreasing side (step S24). If it is determined that the instantaneous fuel consumption has changed to the decreasing side (step S24 / YES), the eco determination unit 13 determines whether or not the eco lamp 50 is currently lit (step S25). Whether or not the eco lamp 50 is lit may be determined by storing the notification content notified to the meter ECU 20 in step S7 of FIG. 8 in a memory, or information from the meter ECU 20 regarding the lighting state of the eco lamp 50. You may get it.

When the eco lamp 50 is on (step S25 / YES), the eco judgment unit 13 initializes a correction value for correcting the instantaneous fuel consumption (step S26). In other words, the eco judgment unit 13 initializes the correction value input to the constant value of the above-described formula (2) or (3). Here, instead of initializing the correction value, it may be changed to a correction value that increases the instantaneous fuel consumption.
When the eco lamp 50 is not lit (step S25 / NO), the eco determination unit 13 changes the correction value to suppress the decrease in instantaneous fuel consumption (step S27). In other words, the eco judgment unit 13 corrects the constant value of the above-described formula (2) or (3) with the correction value, thereby performing correction for suppressing the decrease in instantaneous fuel consumption (step S27). After initializing the correction value (step S26) or changing to a correction value that suppresses the decrease in instantaneous fuel consumption (step S27), the instantaneous fuel consumption is corrected using the initialized or corrected correction value (step S32).

  If it is determined by comparison between the current instantaneous fuel consumption and the previous instantaneous fuel consumption that the instantaneous fuel consumption has increased (steps S24 / NO and S28 / YES), the eco determination unit 13 determines that the eco lamp 50 is It is determined whether or not it is currently lit (step S29).

If the eco lamp 50 is on (step S29 / YES), the eco judgment unit 13 initializes a correction value for correcting the instantaneous fuel consumption (step S31). In other words, the eco judgment unit 13 initializes the correction value input to the constant value of the above-described formula (2) or (3). Here, instead of initializing the correction value, it may be changed to a correction value that reduces the instantaneous fuel consumption.
When the eco lamp 50 is not lit (step S29 / NO), the eco judgment unit 13 changes the correction value to suppress the increase in instantaneous fuel consumption (step S30). That is, the eco judgment unit 13 performs correction for suppressing an increase in instantaneous fuel consumption by correcting the constant value of the above-described formula (2) or (3) with the correction value (step S30). After initialization of the correction value (step S31) or change to a correction value that suppresses the increase in instantaneous fuel consumption (step S30), the instantaneous fuel consumption is corrected using the initialized or corrected correction value (step S32).

  As described above, in this embodiment, the instantaneous fuel consumption display 60 is corrected in accordance with the lighting state of the eco lamp 50. Therefore, the difference between the display of the eco lamp 50 and the instantaneous fuel consumption display 60 can be reduced.

A second embodiment of the present invention will be described with reference to the accompanying drawings.
Also in this embodiment, the instantaneous fuel consumption display 60 is corrected in accordance with the lighting state of the eco lamp 50. When the eco lamp 50 is turned on, as shown in FIG. 10A, the instantaneous fuel consumption display 60 is prohibited from shifting to the decreasing side. Further, when the eco lamp 50 is turned off, as shown in FIG. 10B, the transition to the increase side of the instantaneous fuel consumption display 60 is prohibited.

  The processing procedure of the eco judgment unit 13 of the second embodiment will be described with reference to the flowchart shown in FIG. Note that the processing up to step S45 shown in FIG. 11 is the same as the processing up to step S25 in the flowchart shown in FIG.

  When determining that the instantaneous fuel consumption of the vehicle is changing in the decreasing direction (step S44 / YES), the eco determination unit 13 determines whether the eco lamp 50 is currently lit (step S45). If the eco lamp 50 is on (step S45 / YES), the display of the instantaneous fuel consumption 60 and the display of the eco lamp 50 coincide with each other. If the eco lamp 50 is not lit (step S45 / NO), the eco determination unit 13 uses the previous value of the instantaneous fuel consumption as the current instantaneous fuel consumption (step S46).

  If it is determined in step S47 that the instantaneous fuel consumption is changing and the eco lamp 50 is turned off (step S48 / NO), the eco judgment unit 13 uses the previous value of the instantaneous fuel consumption as the current instantaneous fuel consumption. (Step S49). If the eco lamp 50 is on (step S48 / YES), the instantaneous fuel consumption display 60 and the display of the eco lamp 50 coincide with each other, and the process ends.

  Even by such processing, the display of the instantaneous fuel consumption can be corrected to match the lighting state of the eco lamp 50.

A third embodiment of the present invention will be described with reference to the accompanying drawings.
In this embodiment, when the instantaneous fuel consumption display 60 is switched, there is a limit to the range in which the instantaneous fuel consumption display 60 can be changed according to the lighting state of the eco lamp 50. That is, when the eco lamp 50 is lit and the previous instantaneous fuel consumption display indicates high fuel consumption, the current instantaneous fuel consumption is not displayed as extremely low fuel consumption. Similarly, when the eco lamp 50 is turned off and the previous instantaneous fuel consumption display 60 indicates low fuel consumption, the current instantaneous fuel consumption is not displayed as extremely high fuel consumption.

When the eco lamp 50 is turned on, as shown in FIG. 12A, a limit value is provided on the side where the fuel efficiency is lower than the previous value of the instantaneous fuel efficiency. A predetermined value α [%] (for example, 0.95) is integrated with the previous value of instantaneous fuel consumption, and the integrated value is set as the lower limit value of the movement restriction range. When the eco lamp 50 is lit, a restriction may or may not be provided on the upper limit side of the movement restriction range.
Further, when the eco lamp 50 is turned off, as shown in FIG. 12B, a limit value is provided on the side where the fuel efficiency is higher than the previous value of the instantaneous fuel efficiency. A predetermined value β [%] (for example, 1.05) is integrated with the previous value of instantaneous fuel consumption, and the integrated value is set as the upper limit value of the movement restriction range. When the eco lamp 50 is turned off, a restriction may or may not be provided on the lower limit side of the movement restriction range.

  Further, as shown in FIG. 13, a range in which the instantaneous fuel consumption display 60 can transition between when the eco lamp 50 is lit and when it is not lit may be set. For example, when the eco lamp 50 is turned on, the range of 5 [km / l] to 10 [km / l] is set to a range in which the instantaneous fuel consumption can be displayed, and when the eco lamp 50 is turned off, 0 [km / l] to 5 [km / L] is the range in which the instantaneous fuel consumption can be displayed.

The processing procedure of the present embodiment will be described with reference to the flowchart shown in FIG.
The processing up to step S65 shown in FIG. 14 is the same as the processing up to step S25 in the flowchart shown in FIG.
When the eco lamp 50 is on (step S65 / YES), the eco judgment unit 13 calculates the lower limit value of the movement limit range (step S66). The coefficient α is added to the previous value of the instantaneous fuel consumption acquired in step S62 to calculate the lower limit value of the movement restriction range.
Next, the eco judgment unit 13 compares the current instantaneous fuel consumption acquired in step S61 with the value obtained by adding α to the previous value (that is, the lower limit value of the movement restriction range) (step S67). If the current instantaneous fuel consumption is smaller than the lower limit value of the movement restriction range (step S67 / YES), the eco judgment unit 13 uses the previous instantaneous fuel consumption value x α as the instantaneous fuel consumption used for the instantaneous fuel consumption display 60. (Step S68). In other cases (step S65 / NO or S67 / NO), the process is terminated as it is.

  Next, when it is determined in step S69 that the instantaneous fuel consumption has changed in the increasing direction and the eco lamp 50 is turned off (step S69 / YES and S70 / NO), the current instantaneous fuel consumption and the previous value β Are compared (ie, the upper limit value of the movement restriction range) (step S71). If the current instantaneous fuel consumption is larger than the upper limit value of the movement restriction range (step S72 / YES), the eco determination unit 13 uses the previous instantaneous fuel consumption value × β as the fuel consumption fuel used for the instantaneous fuel consumption display 60. (Step S73). In other cases (step S70 / YES or S72 / NO), the process is terminated as it is.

  By such processing, the instantaneous fuel consumption display 60 can be corrected to match the lighting state of the eco lamp 50.

The embodiment described above is a preferred embodiment of the present invention. However, the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.
For example, in the embodiment described above, the instantaneous fuel consumption calculation unit 111 is provided in the engine control unit 11 of the powertrain ECU 10, but the instantaneous fuel consumption calculation unit 111 may be provided in the meter ECU 20. The meter ECU 20 transmits the calculated instantaneous fuel consumption to the eco judgment unit 13 of the powertrain ECU 10.
In addition, the eco judgment unit 13 may be provided in the meter ECU 20, or may be provided in another ECU such as a navigation ECU that controls navigation.
Further, although the eco-driving support system 1A shown in FIG. 1 is described by taking a gasoline vehicle as an example, the eco-driving support system 1B may be provided in a hybrid vehicle as shown in FIG. In the hybrid vehicle shown in FIG. 15, the eco judgment unit 72 is provided in the hybrid ECU 70 that controls the hybrid system, and the eco judgment unit 72 adjusts the mismatch between the instantaneous fuel consumption and the display of the eco lamp 50.
In the above-described embodiment, the eco judgment unit 13 is provided in the vehicle control device (powertrain ECU 10), and the eco driving state quantity of the vehicle is obtained based on the vehicle speed or the like and displayed in real time. In addition to this, the eco-driving state quantity and the vehicle speed obtained by the eco-judgment unit 13 are recorded on a recording medium or the like, the recorded contents of the recording medium are read into the computer device after getting off, and the eco-driving state quantity over time. Changes may be displayed.
In the above-described embodiments, the instantaneous fuel consumption is described as an example of the display of the fuel consumption information, but an average fuel consumption, a moving average fuel consumption, or the like may be used in addition to the instantaneous fuel consumption.

  In the above-described embodiment, when it is determined that the driving state of the vehicle is the eco driving state, the eco lamp 50 is turned on. However, two lamps for displaying the eco driving state and displaying the non-eco driving state are displayed. The structure which provides may be sufficient. Further, the eco lamp 50 may be turned on when the driving state of the vehicle is in the non-eco driving state, and may be turned off when in the eco driving state.

It is a figure which shows the structure of an eco-driving assistance system. It is a block diagram which shows the hardware constitutions of ECU. It is a figure which shows an example of the map which calculates the eco determination threshold value of an accelerator opening from a vehicle speed. It is a figure which shows the display of an eco lamp, and the display of instantaneous fuel consumption. It is a figure for demonstrating the 1st correction method of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a figure for demonstrating the correction method of the instantaneous fuel consumption by primary delay annealing. It is a figure for demonstrating the correction method of the instantaneous fuel consumption by a rate limit process. It is a flowchart which shows the process sequence of the display content determination of an eco judgment part. It is a flowchart which shows the 1st correction | amendment procedure of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a figure for demonstrating the 2nd correction method of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a flowchart which shows the 2nd correction | amendment procedure of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a figure for demonstrating the 3rd correction method of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a figure for demonstrating the other example of the 3rd correction method of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a flowchart which shows the 3rd correction | amendment procedure of the instantaneous fuel consumption according to the lighting state of an eco lamp. It is a figure which shows the structure which mounted the eco-driving assistance apparatus in the hybrid vehicle.

Explanation of symbols

1A, 1B Eco-driving support system 2 Various sensors 3 Actuator 10 Powertrain ECU
11 Engine control unit 12 Transmission control unit 13 Eco judgment unit 20 Meter ECU
21 Notification Control Unit 30 Indicator Panel 31 Eco Display Unit 41 CPU
42 ROM
43 RAM
44 Input / output unit 50 Eco lamp 60 Instantaneous fuel consumption display 111 Instantaneous fuel consumption calculation unit

Claims (5)

Based on driving operation state information indicating the state of the driving operation of the vehicle by the driver and an eco determination threshold value for determining whether or not the driving operation of the driver is an eco driving operation, the driving operation is eco-friendly. Eco driving operation determination means for determining whether or not the driving operation,
Eco-driving operation display control means for controlling the display so as to display a determination result of whether or not the eco-driving operation is determined by the eco-driving operation determining means;
Fuel consumption display control means for controlling display so as to display fuel consumption information of the vehicle;
Display correction means for correcting fuel consumption information displayed by the fuel consumption display control means based on a display state of whether or not the eco driving operation is displayed by the eco driving operation display control means;
An eco-driving support device characterized by comprising: The eco-driving operation display control means controls the display so as to cause display based on the driving operation state information when the vehicle is in a traveling state when the vehicle is in a traveling state,
The fuel consumption display control means controls the display so that when the vehicle is in a running state, the fuel consumption information is displayed within a predetermined period when the vehicle is in a running state. The eco-driving support device according to claim 1.   The display correction means causes the fuel consumption display control means to display when the fuel efficiency information changes in a direction different from the display state of whether or not the eco driving operation is displayed by the eco driving operation display control means. The eco-driving support device according to claim 1 or 2, wherein fuel efficiency information is corrected.   The display correction means causes the fuel consumption display control means to display when the fuel efficiency information changes in a direction different from the display state of whether or not the eco driving operation is displayed by the eco driving operation display control means. The eco-driving support device according to any one of claims 1 to 3, wherein correction is performed so that a change in fuel consumption information is reduced. A driving state for obtaining an eco degree of the driving state based on driving state information indicating a driving state of the vehicle and an eco determination threshold value for distinguishing whether or not the driving state of the vehicle is an eco driving state. Eco degree acquisition means,
Driving state eco degree display control means for controlling the display so as to display the eco degree of the driving state acquired by the driving state eco degree acquiring means;
Fuel consumption display control means for controlling display so as to display fuel consumption information of the vehicle;
Display correction means for correcting the fuel consumption information displayed by the fuel consumption display control means based on the eco degree of the driving state displayed by the eco driving state display control means;
An eco-driving support device characterized by comprising:

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