JP4376935B2 - Eco driving support device - Google Patents

Description

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

In recent years, eco-driving support devices that support eco-driving of drivers from the viewpoint of environmental protection have been mounted on vehicles. For example, it is determined whether or not the vehicle is in a driving state with good fuel efficiency from the accelerator depression amount, the engine and transmission efficiency, and the driving speed and acceleration. A technique for lighting a light emitting diode (Light Emitting Diode) has been proposed.
Also known is a technique for calculating the fuel consumption rate at a certain moment while the vehicle is traveling and displaying it as the instantaneous fuel consumption.

  In Patent Document 1, in order to effectively encourage the driver to perform a driving operation for improving fuel efficiency, it is determined whether or not the driving operation by the driver is a driving operation suitable for improving fuel efficiency, and is suitable for improving fuel efficiency. The lamp is lit when it is determined that a driving operation is being performed.

JP 2003-220851 A

However, just by displaying whether or not the vehicle is in an eco-driving state using an LED or the like, the driver can, for example, how much the driving state can be improved to shift to the eco-driving state, and how much further the accelerator is depressed. There are inconveniences such as not knowing whether you can be in an eco-driving state.
Therefore, it is only necessary to additionally display support information for eco-driving, but there may be a difference in the plurality of displayed eco-driving support information. For example, if the driver drives near the threshold that separates eco-drive and non-eco-drive, one display will show the eco-drive status, and the other display will show a deviation from the eco-drive status. There is a case. When such inconsistencies occur, the driver may feel stressed and hinder eco-driving.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an eco-driving support device in which a plurality of displays indicating the state of eco-driving are prevented from being shifted.

The eco-driving support device of the present invention determines whether or not the eco-driving state amount representing the eco degree of the driving state of the vehicle is equal to or greater than a first determination threshold value for determining whether or not the vehicle is in the eco-driving state. First display control means for displaying ON / OFF, and second display control means for displaying the eco-drive state quantity in a graphic form so that the state relative to the displayed first determination threshold value can be understood. The first driving control device has at least one of the first determination when the display state is changed from ON to OFF and the case where the display state is changed from OFF to ON. There lines based on the second determination threshold value which is shifted a predetermined amount than the threshold value, the second display control means, even when the display state of the first display control means is also OFF state when an oN state , The first determination Is intended to display a figure corresponding to threshold at the same position, since the it eco operation state quantity exceeds the first determination threshold value does not exceed the second determination threshold value, the first display The eco / non-eco status indicated by the display by the first display control means and the eco / non-existence indicated by the display by the second display control means when the ON / OFF state by the control means does not change for a predetermined time or more. It has a display state adjusting means for changing at least one of the display state by the first display control means and the display state by the second display control means so that the eco state becomes the same state. .
As described above, according to the present invention, even if there is a difference between the eco / non-eco state indicated by the display by the first display control unit and the eco / non-eco state indicated by the display by the second display control unit, the display state It is possible to adjust so that no deviation occurs.
Therefore, the driver can drive according to these displays to improve fuel efficiency.

The eco-driving support device according to the present invention turns on whether or not the eco-driving state quantity indicating the eco degree of the driving state of the vehicle is equal to or more than a first determination threshold value for judging whether or not the vehicle is in the eco-driving state. Eco display comprising: first display control means for displaying / OFF, and second display control means for graphically displaying the eco-driving state quantity so as to show a relative state with respect to the displayed first determination threshold. In the driving support device, the first display control means determines at least one of the case where the display state is changed from ON to OFF and the case where the display state is changed from OFF to ON. There lines based on the second determination threshold value which is shifted a predetermined amount than the value, the second display control means, even when the display state of the first display control means is also OFF state when an oN state, the First judgment A graphic corresponding to a large value is displayed at the same position, and since the eco-driving state quantity exceeds the first determination threshold but does not exceed the second determination threshold, the first display It has a display state adjusting means for changing the ON / OFF state by the first display control means when a state where the ON / OFF state by the control means does not change has passed for a predetermined time or longer.
According to the present invention, even if a deviation occurs between the eco / non-eco state indicated by the display by the first display control unit and the eco / non-eco state indicated by the display by the second display control unit, the display state is not shifted. It can be adjusted so that it does not occur.
Therefore, the driver can drive according to these displays to improve fuel efficiency.

  In the eco-driving support device, the display state adjusting means is configured such that when the second determination threshold is set below the first determination threshold, the eco-driving state amount is the first value. After the threshold value is greater than the threshold value, the ON / OFF state by the first display control means is changed when the state equal to or higher than the second determination threshold value and lower than the first threshold value continues for a predetermined time or longer. It is a feature.

  In the eco-driving support device, the display state adjusting means determines that the eco-driving state quantity is the first determination when the second determination threshold is set above the first determination threshold. After the value falls below a threshold value, the ON / OFF state by the first display control means is changed when a state that is equal to or higher than the first determination threshold and equal to or lower than the second determination threshold continues for a predetermined time or longer. It is said.

  ADVANTAGE OF THE INVENTION According to this invention, the eco-drive assistance apparatus which prevented the shift | offset | difference to the several display showing the state of eco-drive can be provided.

  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 that consumption of fossil fuels is suppressed, or generation and emission of harmful substances and carbon dioxide caused by combustion of fossil fuels are suppressed.
An eco-driving support system 1A shown in FIG. 1 includes a powertrain ECU (Electronic Control Unit) 10 that controls an engine and a transmission, an HV-ECU 60 that controls a hybrid system, and a meter ECU 20 that controls display of an indicator panel 30. And a motor / generator ECU 70 that controls the motor / generator are connected by an in-vehicle communication bus. In this embodiment, the HV-ECU 60 has a function as an eco-driving support device. 1 shows a powertrain ECU 10, a meter ECU 20, an HV-ECU 60, and a motor / generator ECU 70 as ECUs connected to the in-vehicle communication bus. A plurality of other ECUs are connected to the in-vehicle communication bus. Has been.
Note that 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 powertrain ECU 10 acquires sensor signals representing the intake air amount, air-fuel ratio, and the like from the various sensors 2, and calculates control command values such as fuel injection amount, ignition timing, and shift timing based on the acquired sensor signals. . Further, an actuator such as an injector or an ignition coil is controlled based on the calculation result.

  The HV-ECU 60 controls the overall hybrid system so that the hybrid vehicle can operate most efficiently by mutually managing and controlling a battery ECU (not shown), an engine ECU, a motor / generator ECU 70, and the like. The HV-ECU 60 is provided with an HV control unit 61 and an eco judgment unit 62 as shown in FIG.

  The HV control unit 61 inputs sensor signals measured by the various sensors 2 and signals from other EUCs, and generates a control signal for controlling the hybrid system. Further, the HV control unit 61 outputs an HV state signal indicating the state of the HV system to the eco judgment unit 62. The HV state signal includes vehicle power, vehicle limit output power, battery charging permission power, and the like.

  The eco judgment unit 62 (corresponding to the first display control unit, the second display control unit, and the display state adjustment unit of the present invention) 62 is an HV state signal output from the HV control unit 61 and various sensors 2. The sensor signal to be output is input, and an eco-driving state quantity representing the eco degree of the driving state of the vehicle is calculated. Details of the eco-driving state quantity will be described later. The sensor signal input to the eco judgment unit 62 is detected by an accelerator opening measured by an accelerator opening sensor (not shown), a vehicle speed measured by a vehicle speed sensor (not shown), and a shift position sensor (not shown). And the state of a switch for switching a vehicle control mode (power mode, sports mode, etc.).

Further, the eco determination unit 62 determines whether the current driving state of the vehicle is in the eco driving state or the non-eco driving state based on the calculated eco driving state amount. Details of this processing will also be described later.
The eco judgment unit 62 outputs an eco state signal representing the eco driving state amount and the determination result of the current eco driving state of the vehicle to the notification control unit 21 of the meter ECU 20.

Here, the eco-driving state quantity generated by the eco judgment unit 62 will be described.
The eco-driving state quantity generated in the present embodiment is calculated based on the vehicle power. The vehicle power is expressed as the amount of electric power and the power, and can be obtained by the sum of the product of the engine torque and the engine speed and the product of the motor torque and the motor speed. In a hybrid vehicle, since a motor driven by electric power and an engine are provided, vehicle power is used to express energy generated by both the motor and the engine on one basis.
The eco judgment unit 62 acquires the vehicle speed from the various sensors 2 and acquires the current vehicle power of the vehicle from the HV control unit 61. Next, with reference to the map shown in FIG. 2, a vehicle power determination threshold value that can be determined as the eco-driving state at the current vehicle speed is calculated. The map shows the vehicle speed and the upper limit value of vehicle power that can be determined to be in the eco-driving state (hereinafter, this value is referred to as a determination threshold value). When the vehicle power determination threshold value is obtained with reference to the map shown in FIG. 2, the eco determination unit 62 divides the current vehicle power acquired from the HV control unit 61 by the determination threshold value according to the equation (1). The eco-driving state quantity is calculated by adding 100 to the divided value.
Eco-driving state quantity = ((current vehicle power / judgment threshold) x 100) (%) (1)

The meter ECU 20 is an ECU that controls the display of the indicator panel 30. In particular, in the present embodiment, the eco ECU 31 acquires an eco state signal from the eco judgment unit 62, and the eco display unit 31 of the indicator panel 30 based on the eco state signal. To display the eco-drive status display in real time.
The indicator panel 30 is provided with an eco display unit 31 that displays whether or not the vehicle is in an eco driving state. The eco display unit 31 displays the state of eco driving in real time based on the control of the notification control unit 21. Specific display contents of the eco display unit 31 will be described later.

  The motor / generator ECU 70 controls driving of the motor / generator in accordance with various state signals and various control signals output from the HV-ECU 60.

  FIG. 3 shows a hardware configuration of the HV-ECU 60, the power train ECU 10, and the meter ECU 20. As shown in FIG. 3, a ROM 42 that stores a program for realizing control processing by the ECU and a program for eco-determination described later, and a central processing unit (CPU) that reads and executes the program stored in the ROM 42. ) 41, a RAM 43 for storing temporary data used when executing the program, a data input / output unit 44, and the like.

4A and 4B show display examples displayed on the eco display unit 31 of the indicator panel 30. FIG.
In this display example, the eco bar display 50 and the display of the eco lamp 80 are displayed.
A display that graphically displays the eco-driving state amount so that the relative state with respect to the displayed determination threshold value is known corresponds to the eco-bar display 50. In addition, a display that displays ON / OFF whether or not the eco-driving state amount is equal to or greater than a determination threshold value for determining whether or not the eco-driving state is in the eco-driving state corresponds to the display of the eco lamp 80.
The eco bar display 50 includes an eco driving state amount bar display 51 that represents the current eco driving state of the vehicle, and an eco driving region (shown in FIG. 4A) that indicates an area in which the vehicle can be determined to be in the eco driving state. (Between OA) 52, a non-eco driving region (between A and B shown in FIG. 4A) 53 indicating a region that can be determined not to be in an eco driving state, and a vehicle being in a regenerative driving state. A regenerative region (between C--O shown in FIG. 4A) 54 showing the region, a non-eco-operation region (between C-D shown in FIG. 4A) 55 on the regenerative region side, and engine start The threshold value (point G shown in FIG. 4A) and the HV eco-zone 56 are displayed.
A point A shown in FIG. 4A indicates the upper limit value of the eco-operation region 52, that is, the determination threshold value, and indicates the boundary line between the eco-operation region 52 and the non-eco-operation region 53. When the eco-driving state quantity is on the determination threshold A, it indicates that the eco-driving state quantity is 100%. Further, the point O is the origin, and indicates the boundary line between the eco-operation area 52 and the regeneration area 54. If the eco-driving state quantity is on the O point, it indicates that the eco-driving state quantity is 0%. Further, the point C indicates a determination threshold value for the regeneration region 54. When the eco-driving state quantity is on the point C, the eco-driving state quantity indicates a state of −100%. The regenerative region 54 from the point O to the point C is a region prepared for the hybrid vehicle, and indicates that the driving state of the vehicle is in a regenerative driving state by an operation such as a regenerative brake. Further, the non-eco-operating region 55 on the regenerative region 54 side shows a state in which a brake operation using a mechanical brake is performed in addition to the regenerative brake. The engine start threshold value G is a threshold value indicating whether or not to start the engine of the hybrid vehicle. When the eco-driving state quantity exceeds the engine start threshold value, the engine is activated by the powertrain ECU 10. It has started. If the driving state quantity is equal to or less than the engine start threshold value, that is, within the HV eco-zone 56, the vehicle is driven by the driving force of the motor.

In the eco bar display 50, the determination threshold value of the eco driving area 52 is set to 100% to indicate how much the current eco driving state quantity is located with respect to the ideal eco driving area (eco driving area 52). It is displayed in the ratio (relative ratio).
When the eco-driving state quantity is in the eco-driving area 52, the operation surplus amount with respect to the judgment threshold value for eco-driving can be displayed. In the example shown in FIG. 4A, the EA section indicates the operation surplus amount.
When the eco-driving state quantity is in the non-eco-driving region 53, the operation deviation amount from the eco-driving determination threshold value can be displayed. In the example shown in FIG. 4B, the section A-F shows the operation deviation amount.

  The eco lamp display 80 is a lamp display such as an LED (Light Emitting Diode) that displays whether or not the vehicle is in an eco-driving state. It is not lit when not.

  As shown in FIGS. 4 (A) and 4 (B), by displaying the eco bar display 50 and the eco lamp display 80 on the indicator panel 30, it is displayed whether or not the vehicle is currently in an eco driving state. An operation guideline for maintaining the eco-driving state or recovering the eco-driving state can be displayed.

However, if the eco-driving state quantity and the determination threshold are simply compared to determine whether the eco lamp 80 is turned on or off, the eco lamp can be used when the driver performs an operation near the determination threshold. Chattering in which the display of 80 frequently repeats on and off occurs.
Therefore, a guard value is provided below the determination threshold as shown in FIG. 5A or above the determination threshold as shown in FIG. When there is an eco-driving state quantity between the two, the chattering can be prevented from occurring by not switching the display of the eco lamp 80.
However, the provision of the guard value may cause a mismatch between the eco bar display 50 and the eco lamp 80 display.
For example, a case where a lower guard value is provided below the determination threshold will be described. When the eco-driving state quantity that was in the non-eco-driving region above the judgment threshold falls as shown in FIG. 5 (A) and enters between the judgment threshold and the lower card value, In the eco bar display 50, the eco driving state quantity is displayed in the eco driving area 52. However, since the eco-driving state amount is between the determination threshold value and the lower guard value, the display of the eco lamp 80 remains off in the non-eco driving state.
Similarly, display mismatch occurs when the upper guard value is provided above the upper limit guard. As shown in FIG. 5 (B), the eco-driving state quantity that was in the eco-driving region below the determination threshold increases as shown in FIG. When entering between the guard values, the eco bar display 50 displays the eco driving state amount in the non-eco driving region 53. However, since the eco-driving state amount is between the determination threshold value and the upper guard value, the display of the eco lamp 80 remains lit in the eco-driving state.

In order to eliminate such display inconsistency, in this embodiment, when the eco-driving state quantity falls between the determination threshold value and the lower limit guard value or between the determination threshold value and the upper limit guard value, Counting is started, and control is performed to change the display of the eco lamp 80 when the timer count value counts a predetermined value. The lower limit guard value and the upper limit guard value correspond to the second determination threshold value of the present invention.
Both the lower guard value and the upper guard value are not used at the same time, and only one of them is set. Also, when the lower guard value is set and the eco-drive state quantity rises from below the lower guard value and falls between the lower guard value and the judgment threshold value Since there is no difference between the eco bar display 50 and the eco lamp 80 display, the timer is not counted. The amount of eco-drive state continues in the eco-drive region 52, and the display of the eco lamp 80 is also lit in the eco-drive state.
Similarly, when the upper guard value is set, the eco-drive state quantity falls from the upper side of the upper guard value and falls between the upper guard value and the determination threshold value. Since there is no difference between the display 50 and the display of the eco lamp 80, the timer is not counted. The amount of eco-driving state continues in the non-eco-driving region 53, and the display of the eco lamp 80 is not lit in the non-eco-driving state.

Changes in the amount of eco-drive state and display switching of the eco lamp 80 associated therewith will be described with reference to FIGS. First, the case where the lower guard value is set below the determination threshold will be described with reference to FIG.
When the amount of operation of the vehicle (for example, accelerator opening) increases at point A shown in FIG. 6 and the eco-driving state amount exceeds the determination threshold, the eco-determination unit 62 sets the driving state of the vehicle to the non-eco state. judge. Since the driving state has changed to the non-eco state, the eco lamp 80 is also changed from lighting to non-lighting.
Thereafter, at point B shown in FIG. 6, when the amount of operation of the vehicle decreases and the eco-driving state quantity falls below the determination threshold value, the eco judgment unit 62 starts counting by the counter. If the eco-drive state quantity exceeds the determination threshold before the count value of the counter exceeds the timeout value (point C shown in FIG. 6), the determination of the non-eco state is continued. If the eco-driving state amount falls below the lower guard value before exceeding the timeout value, the eco-determining unit 62 determines that the eco-driving state is in effect and turns on the eco lamp 80.
Also, if the eco-drive state quantity is below the determination threshold (point D shown in FIG. 6) and the counter count value exceeds the timeout value while it is between the determination threshold and the lower guard value ( 6), the eco judgment unit 62 judges that the vehicle is in the eco driving state and turns on the eco lamp 80.

Next, a case where the upper guard value is provided above the determination threshold will be described with reference to FIG.
When the amount of operation of the vehicle decreases and the eco-driving state quantity falls below the determination threshold at point F shown in FIG. Since the driving state has changed to the eco state, the eco lamp 80 is also changed from non-lighting to lighting.
Thereafter, at point G shown in FIG. 7, when the amount of operation of the vehicle increases and the eco-driving state quantity exceeds the determination threshold value, the eco-determination unit 62 starts counting by the counter. Before the count value of the counter exceeds the timeout value, when the eco-drive state quantity falls below the determination threshold (point H shown in FIG. 7), the determination of the eco state is continued. Moreover, if the eco-driving state amount exceeds the upper guard value before exceeding the timeout value, the eco-determining unit 62 determines that the state is not eco-friendly.
Further, when the eco-drive state quantity exceeds the determination threshold (point I shown in FIG. 7) and the counter value exceeds the timeout value while being between the determination threshold and the upper guard value (FIG. 7). 7), the eco determination unit 62 determines that it is in the non-eco state.

Next, the processing procedure of the eco judgment unit 62 for displaying the eco bar display 50 and the eco lamp 80 on the eco display unit 31 of the indicator panel 30 will be described with reference to the flowchart shown in FIG.
First, when the measurement data is input from the various sensors 2, the eco determination unit 62 determines whether or not the input data is normal (step S1). The eco determination unit 62 determines whether the various sensors 2 are operating normally from the input data. For example, when the same data is input continuously for a predetermined time or more, it is determined that a sticking abnormality has occurred in the various sensors 2.
When the eco judgment unit 62 determines that the measurement data is not normal (step S1 / NO), it calculates 0% as the eco driving state amount at the time of the sensor failure (step S8).

If it is determined that the measurement data is normal (step S1 / YES), the eco judgment unit 62 determines whether or not the state of the vehicle is in a state in which an eco driving display (display of the eco bar display 50 and the eco lamp 80) can be provided. Determine (step S2). When the shift lever is in the back or parking position or when a signal for turning on the power switch is input, it is determined that the eco-drive display is not possible.
When the eco judgment unit 62 determines that the eco driving display is not possible (step S2 / NO), it calculates 0% as the eco driving state amount at the time of exclusion (step S9).

  Next, the eco judgment unit 62 obtains a judgment threshold value for eco driving with reference to the map shown in FIG. 2 (step S3). In this embodiment, the determination threshold value and the vehicle power are calculated based on the vehicle speed input by the sensor. The eco determination unit 62 stores the map shown in FIG. 2 in a memory, and obtains a vehicle power determination threshold value from the vehicle speed measured by the vehicle speed sensor of the various sensors 2. Note that the map shown in FIG. 2 is calculated by adaptation.

  Next, the eco judgment unit 62 calculates an eco driving state quantity from the judgment threshold obtained in step S3 and the current vehicle power obtained from the measurement data of the various sensors 2 (step S4). The eco-driving state quantity can be obtained by the above-described equation (1).

Next, the eco determination unit 62 determines whether or not the vehicle is currently stopped (step S5). Based on the vehicle speed input from the vehicle speed sensor of the various sensors 2, it is determined 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 running 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 S5 / YES), 0% is calculated as the eco-driving state amount when the vehicle is stopped (step S10).

Next, the eco judgment unit 62 determines the display state of the eco lamp 80 from the calculated eco driving state quantity. Details of this processing will be described later with reference to the flowcharts shown in FIGS.
When the display state of the eco lamp 80 is determined, the eco determination unit 62 notifies the meter ECU 20 of the information indicating the eco driving state amount and the display state of the eco lamp 80. The meter ECU 20 displays the eco bar display 50 and the display of the eco lamp 80 based on the eco state amount notified by the eco determination unit 62 and the information on the eco lamp display state.

Next, details of step S6 will be described with reference to the flowcharts shown in FIGS. FIG. 9 shows a flow when the lower guard value is provided below the determination threshold.
First, the eco judgment unit 62 recognizes whether the judgment result based on the previous measurement data is an eco judgment or a non-eco judgment (step S21). If the determination based on the previous measurement data is the eco determination (step S21 / NO), the eco determination unit 62 turns off the flag (step S26) and ends this process. Further, when the determination based on the previous measurement data is the non-eco determination (step S21 / YES), the eco determination unit 62 determines whether or not the eco driving state amount is larger than the determination threshold (step S21). S22). When the amount of eco-drive state is larger than the determination threshold value (step S22 / YES), the eco determination unit 62 continues the non-eco determination (step S23). When the eco-driving state quantity is equal to or less than the determination threshold value (step S22 / NO), the eco-judgment unit 62 determines whether the eco-driving state quantity is equal to or greater than the lower guard value and equal to or less than the determination threshold value. Determine whether or not. When the eco-drive state quantity is not less than the determination threshold value (step S24 / NO), that is, when the eco-drive state quantity is smaller than the lower guard value, the eco-judgment unit 62 An eco determination is made (step S25), the flag is turned off, and this process ends.
If the eco-driving state quantity is equal to or greater than the lower guard value and equal to or less than the determination threshold value (step S24 / YES), the eco determination unit 62 determines whether or not the flag is set to ON ( Step S27). This flag is a flag that is turned on when the eco-drive state quantity enters between the determination threshold value and the lower guard value from the non-eco area.

If the flag is not turned on (step S27 / NO), the eco judgment unit 62 turns on the flag and starts counting the counter (step S28), and the non-eco driving state continues. Determination is made (step S29).
If the flag is on (step S27 / YES), the eco determination unit 62 determines whether the count value of the counter is equal to or greater than the timeout value (step S30). If the count value of the counter is smaller than the timeout value (step S30 / NO), the eco judgment unit 62 returns to step S21 and performs processing for the next measurement data. Further, when the count value of the counter is equal to or greater than the timeout value (step S30 / YES), the eco determination unit 62 is located between the lower limit guard and the determination threshold for the eco operation state amount for a predetermined time or more. The eco judgment is made (step S31), the counter is reset (step S32), and the flag is turned off (step S33).

Next, the processing flow of the eco determination unit 62 when the upper guard value is provided above the determination threshold will be described with reference to the flowchart shown in FIG.
First, the eco judgment unit 62 recognizes whether the eco judgment result based on the previous measurement data is the eco judgment or the non-eco judgment (step S41). When the determination based on the previous measurement data is the non-eco determination (step S41 / NO), the eco determination unit 62 turns off the flag (step S46) and ends this process. Further, when the determination based on the previous measurement data is the eco determination (step S41 / YES), the eco determination unit 62 determines whether or not the eco driving state quantity is smaller than the determination threshold (step S42). ). If the eco-driving state quantity is smaller than the determination threshold value (step S42 / YES), the eco determination unit 62 continues the eco determination (step S43). When the eco-driving state quantity is equal to or greater than the determination threshold value (step S42 / NO), the eco-judgment unit 62 determines whether the eco-driving state quantity is equal to or less than the upper guard value and equal to or greater than the determination threshold value. Is determined (step S44). When the eco-driving state quantity is equal to or less than the upper guard value and not equal to or greater than the determination threshold value (step S44 / NO), that is, when the eco-driving state quantity is larger than the upper guard value, the eco judgment unit 62 is non-eco. A determination is made (step S45), the flag is turned off (step S46), and this process ends.
When the eco-driving state quantity is equal to or less than the upper guard value and equal to or greater than the determination threshold value (step S44 / YES), the eco determination unit 62 determines whether the flag is set to ON (step S44). S47). This flag is a flag that is turned on when the eco-drive state quantity enters between the determination threshold value and the lower guard value from the eco-region.

If the flag is not turned on (step S47 / NO), the eco judgment unit 62 turns on the flag and starts counting the counter (step S48), and makes an eco judgment that the eco driving state continues. (Step S49).
If the flag is set to ON (step S47 / YES), the eco judgment unit 62 determines whether the count value of the counter is equal to or greater than the timeout value (step S50). When the count value of the counter is smaller than the timeout value (step S50 / NO), the eco judgment unit 62 returns to step S41 and performs processing for the next measurement data. In addition, when the count value of the counter is equal to or greater than the timeout value (step S50 / YES), the eco determination state unit 62 is positioned between the lower limit guard and the determination threshold value when the eco operation state quantity is equal to or greater than a predetermined time. Is determined to be non-eco (step S51), the counter is reset (step S52), the flag is turned off (step S53), and the process is terminated.

  As described above, in this embodiment, when there is a deviation between the eco bar display 50 indicating whether the vehicle is performing eco driving or non-eco driving and the display of the eco lamp 80, the display of the eco lamp 80 is displayed. Since the correction to match the eco bar display 50 is performed, the display is not shifted. Therefore, the driver can drive according to these displays to improve fuel efficiency.

In the present embodiment, the time-out time of the counter is changed according to the vehicle speed and the accelerator operation amount. For example, when the fluctuation of the vehicle speed or the accelerator operation amount is large, the timeout time is set short, and the display of the eco lamp 80 is controlled so as to quickly follow the change of the eco driving state quantity of the eco bar display 50.
In addition to this, it is also possible to learn the operation level of the driver and set the timeout time of the counter according to the learned operation level.
For example, in the case of a driver with a high operation level in which the time determined to be eco-driving during one trip (from ignition key on to off) is longer than the reference time, the time-out time is set longer. On the other hand, if the driver is a driver with a low operation level, the time determined to be eco-driving during one trip is shorter than the reference time, the timeout time is set short.

  Furthermore, in addition to changing the count value of the counter, the lower guard value depends on the time during which the eco-drive state amount stays between the above-described determination threshold value and the lower guard value or the upper guard value. Alternatively, the setting of the upper guard value may be changed. Specifically, for a driver whose eco-driving state amount is located between the determination threshold value and the lower guard value, the lower guard value is increased by increasing the lower guard value. Reduce the width with the judgment threshold. The same applies to the upper guard value. By performing such control, it is possible to shorten the shift time between the display of the eco lamp 80 and the eco bar display 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, although the eco judgment unit 62 is provided in the HV-ECU 60 in the above-described embodiment, the eco judgment unit can be provided in the powertrain ECU 10 shown in FIG. FIG. 11 shows the configuration of an eco-driving support system 1B for a vehicle equipped with only an engine. The eco determination unit 13 shown in FIG. 11 also acquires control information from the engine control unit 11 and the transmission control unit 12 in the powertrain ECU 10, and also acquires sensor signals from the various sensors 2 to determine the eco driving state of the vehicle. The amount of eco-driving state is calculated. Based on the calculated eco-driving state quantity, the eco-determining unit 13 determines whether the driving state of the vehicle is in the eco-driving state or the non-eco-driving state.
Further, as shown in FIG. 12, the eco judgment unit may be provided in the meter ECU 20. FIG. 12 shows a configuration in which an eco judgment unit is provided in the meter ECU 20 in an eco driving support system 1C for a vehicle equipped with only an engine. In this case, meter ECU20 acquires vehicle information, such as a vehicle speed, from powertrain ECU10 by CAN communication, and calculates an eco-driving state quantity based on the acquired information. The display state of the eco bar display 50 and the eco lamp 80 is determined based on the calculated eco driving state quantity, and is displayed on the eco display unit 31.
Further, the navigation ECU that controls the navigation device may be provided with the function of the eco judgment unit 62 described above, and the eco bar display 50 described above may be displayed on the display of the navigation device.

In addition, the display of the non-eco-operation area 53 may be displayed by on / off lighting control of LEDs or the like instead of the eco-bar display (see FIG. 13A), or the non-eco-operation area 55 on the regenerative area side is indicated by the LED. The on / off lighting control may be displayed (see FIG. 13B). When the amount of eco-drive state exceeds 100%, the non-eco-drive region 53 is turned on (lit). Similarly, when the eco-drive state quantity exceeds −100%, the non-eco-drive area 55 on the regeneration area side is turned on (lit).
Moreover, the display of the regeneration area | region 54 may be made into an eco bar display, and LED on / off lighting control may be performed.
Further, in the eco display unit 31, an area where the eco-driving state amount is 0% or more may be divided into an HV eco zone 56 area and other areas, or the HV eco zone 56 is not provided. Also good.
Further, the eco display unit 31 may employ a circle display such as a speedometer shown in FIG. 13C instead of the eco bar display.
In the above-described embodiment, the eco-driving state quantity of the vehicle is obtained based on the vehicle speed or the like and displayed in real time. For example, the vehicle speed and the eco-driving state quantity obtained by the eco judgment unit 62 are recorded. It may be recorded on a medium or the like, and the recorded contents of the recording medium may be read into a computer device after getting off and a change with time of the eco-driving state quantity may be displayed.
In the above-described embodiment, the eco-driving state quantity is calculated by obtaining the vehicle power and comparing it with the determination threshold. However, in addition to the vehicle power, the eco-driving state quantity is based on the accelerator opening. May be calculated.

It is a figure which shows the structure of an eco-driving assistance system. It is a figure which shows the map for calculating a determination threshold value from a vehicle speed. It is a block diagram which shows the hardware constitutions of ECU. It is a figure which shows an eco bar display and an eco lamp display, (A) shows the case where a state quantity exists in an eco-operation area | region, (B) has shown the case where a state quantity exists in a non-eco-operation area | region. It is a figure which shows an eco-driving state quantity, an eco-driving area | region, and a non-eco-driving area | region, (A) shows the case where a lower side guard value is set below the judgment threshold value, and (B) judges. The upper guard value is set above the threshold value. It is a figure which shows the change of the amount state of eco-drive when a lower guard value is set, and the lighting / non-lighting state of the eco lamp. It is a figure which shows the change of the amount state of eco-drive when an upper guard value is set, and the lighting / non-lighting state of the eco lamp. It is a flowchart which shows the process sequence of an eco judgment part. It is a flowchart which shows the procedure of determining an eco state and a non-eco state based on the amount of eco-drive states when the lower guard value is set. It is a flowchart which shows the procedure which determines an eco state and a non-eco state based on the amount of eco-drive states when an upper guard value is set. It is a figure which shows the structure of the eco-driving assistance system which provided the eco judgment part in powertrain ECU. It is a figure which shows the structure of the eco-drive assistance system which provided the eco judgment part in meter ECU. It is a figure which shows the other example of an eco bar display.

Explanation of symbols

1 Eco-driving support system 2 Sensor 10 Powertrain ECU
13 Eco judgment unit 20 Meter ECU
21 Notification Control Unit 30 Indicator Panel 31 Eco Display Unit 60 HV-ECU
61 HV control unit 62 Eco judgment unit 70 Motor / generator ECU
80 Eco lamp display

Claims (4)

A first display that displays ON / OFF whether or not the eco-driving state quantity representing the eco degree of the driving state of the vehicle is equal to or greater than a first determination threshold value for determining whether or not the vehicle is in the eco-driving state. An eco-driving support device comprising: a control means; and a second display control means for displaying the eco-driving state quantity in a graphic manner so that a relative state with respect to the displayed first determination threshold value can be understood.
The first display control means shifts at least one of the case of changing the display state from the ON state to the OFF state and the case of changing the display state from the OFF state to the ON state by shifting a predetermined amount from the first determination threshold value. There rows based on 2 determination threshold,
The second display control means displays the graphic corresponding to the first determination threshold value at the same position regardless of whether the display state of the first display control means is the ON state or the OFF state. Yes,
Since the eco-drive state quantity exceeds the first determination threshold but does not exceed the second determination threshold, a state where the ON / OFF state by the first display control means does not change has elapsed for a predetermined time or more. In this case, the first display control is performed so that the eco / non-eco state indicated by the display by the first display control unit is the same as the eco / non-eco state indicated by the display by the second display control unit. An eco-driving support device comprising display state adjusting means for changing at least one of a display state by the means and a display state by the second display control means. First display control means for displaying ON / OFF whether or not the eco-driving state quantity indicating the eco degree of the driving state of the vehicle is equal to or greater than a first determination threshold value for determining whether or not the vehicle is in the eco-driving state. When,
An eco-driving support device comprising: a second display control unit that graphically displays the eco-driving state amount so that a relative state with respect to the displayed first determination threshold value can be understood;
The first display control means shifts at least one of the case of changing the display state from the ON state to the OFF state and the case of changing the display state from the OFF state to the ON state by shifting a predetermined amount from the first determination threshold value. There rows based on 2 determination threshold,
The second display control means displays the graphic corresponding to the first determination threshold value at the same position regardless of whether the display state of the first display control means is the ON state or the OFF state. Yes,
Since the eco-driving state quantity exceeds the first determination threshold value but does not exceed the second determination threshold value, a state in which the ON / OFF state by the first display control means does not change has elapsed for a predetermined time or more. In this case, the eco-driving support device further includes a display state adjusting unit that changes the ON / OFF state by the first display control unit.   When the second determination threshold value is set to be lower than the first determination threshold value, the eco-drive state amount is greater than the first threshold value. 3. The ON / OFF state by the first display control means is changed when a state that is equal to or greater than the second determination threshold value and equal to or less than the first threshold value continues for a predetermined time later. Eco-driving support device.   In the case where the second determination threshold value is set above the first determination threshold value, the display state adjusting means is configured such that after the eco-driving state quantity falls below the first determination threshold value, 3. The ON / OFF state by the first display control means is changed when a state that is equal to or greater than the first determination threshold value and equal to or less than the second determination threshold value continues for a predetermined time or more. Eco driving support device.

Images