JP5337501B2 - Eco driving support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical-drive assist device which gives the driving advice of economical drive according to an energy state of a vehicle. <P>SOLUTION: The economical-drive assist device includes: an HV control section 21 for calculating vehicle power generated in the vehicle; a power management ECU 60 for detecting the use state of an electrical load; a means for calculating an economical drive state amount representing the degree of economy of the driving state of the vehicle based on the calculated vehicle power; a means for setting a threshold value for determining that the driving state of the vehicle is in the economic driving state based on the calculated vehicle power and the detected use state of the electrical load; a means for determining that a calculated economical drive state amount is equal to or larger than the set threshold value; and an economy determination section 22, which functions as a means for notifying whether or not the present vehicle power is equal to or larger than the threshold value based on a determination result to an occupant. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

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-driving support device prepares eco-judgment thresholds that take into account the amount of accelerator depression, engine and transmission efficiency, as well as travel speed and acceleration. It is determined using an eco determination threshold value whether or not a good running state is called an eco driving state. When it is determined that the vehicle is in the eco-drive state, an LED (Light Emitting Diode) or the like is lit.

However, the eco determination threshold value used for the determination of the eco driving state is set to a threshold value with a margin that can further reduce the fuel consumption.
The reason for this is mainly to prevent the driver from feeling as much of the annoyance associated with eco-driving as much as possible in order to improve the eco-driving execution rate. In addition, since the uphill road is not determined, it is also intended to prevent excessive non-eco determination on the uphill road.

In Patent Document 1, in order to calculate an accurate travel distance, the type of road currently being traveled is determined, and the reference fuel efficiency is calculated from the road type and fuel consumption data. Then, the reference fuel efficiency calculated based on traffic jam information, road gradient, and the like is corrected, and the cruising distance is calculated and displayed from the corrected reference fuel efficiency and the remaining amount of fuel.
In Patent Document 2, in order to control the notification timing of the remaining amount of fuel, a determination threshold is set based on the road type, map data, traffic information, travel history data, and occupant information. And the travelable distance are compared to determine the necessity of the remaining fuel amount notification.

JP-A-5-203456 JP 2006-199273 A

  For the driver, when the remaining amount of fuel is low, it is useful information if a driving guide for eco-driving according to road conditions and traffic conditions is displayed. However, the technique disclosed in Patent Document 1 is an accurate calculation of the travel distance, and the technique disclosed in Patent Document 2 is a notification of the remaining amount of fuel at an optimal timing. For example, if you can provide eco-driving advice that can cut down the maximum amount of fuel when the remaining amount of fuel is low, you can bring the vehicle to the nearest gas station and reduce the number of gas shortages etc. Can do.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an eco-driving support device capable of providing eco-driving travel advice in accordance with the energy state of a vehicle.

In order to achieve this object, an eco-driving support device according to the present invention includes a vehicle speed detection unit that detects a vehicle speed, a vehicle power calculation unit that calculates vehicle power generated in the vehicle , and a vehicle calculated by the vehicle power calculation unit. Based on the power, the eco-driving state quantity calculating means for calculating the eco-driving state quantity representing the eco degree of the driving state of the vehicle, the electric load detecting means for detecting the usage status of the electric load, and the vehicle power calculating means Based on the measured vehicle power and the usage status of the electrical load detected by the electrical load detection means, a vehicle power threshold value for determining that the driving state of the vehicle is in an eco-driving state is set. threshold complement to correct based and threshold setting means, the set threshold by the threshold value setting means, the vehicle speed detected by the vehicle speed detecting means And means, determination means for determining that the eco operation state quantity calculated by the eco-drive state quantity calculating means is the threshold value correcting means greater than or equal to the threshold are corrected by the determination result by the determining means And a notification means for notifying an occupant whether or not the current vehicle power is equal to or greater than a threshold value .
According to the present invention, the threshold value for determining that the driving state of the vehicle is in the eco driving state is set based on the vehicle power generated in the vehicle and the usage state of the electric load , and this is set based on the vehicle speed. Have been corrected. Therefore, a threshold value commensurate with the actual fuel consumption can be set, and traveling advice for eco-driving according to the energy state of the vehicle becomes possible.

The eco-driving support device of the present invention includes a vehicle speed detecting means for detecting a vehicle speed, an accelerator opening detecting means for detecting an accelerator opening indicating an amount of depression of an accelerator pedal, and an electric load detecting means for detecting a usage state of an electric load. And the accelerator for determining that the driving state of the vehicle is in an eco-driving state based on the vehicle speed detected by the vehicle speed detecting unit and the usage state of the electric load detected by the electric load detecting unit. Threshold value setting means for setting a threshold value of the opening, and threshold value correction means for correcting the threshold value set by the threshold value setting means based on the vehicle speed detected by the vehicle speed detection means When the determining means that the accelerator opening degree detected by the accelerator opening detection means is configured threshold or more by the threshold value setting means, said-format Based on the determination result by the means, and a notifying means which the accelerator opening is informed whether or above the threshold to the occupant.
According to the present invention, the threshold value for determining that the driving state of the vehicle is in the eco-driving state based on the accelerator opening indicating the depression amount of the accelerator pedal and the usage state of the electric load is set . Is corrected based on the vehicle speed. Therefore, a threshold value commensurate with the actual fuel consumption can be set, and traveling advice for eco-driving according to the energy state of the vehicle becomes possible.

The eco-driving support device includes an acquisition unit that acquires current position information of the vehicle and map information around the vehicle from a navigation device, and the threshold value correction unit includes the current position of the vehicle and the supply of fuel. If it is determined that the fuel needs to be cut off based on the distance from the fueling station where the fuel can be changed or the battery station where the battery can be replaced or charged , the threshold value is reset so that the value becomes lower .
Therefore, if it is determined that fuel truncation is necessary based on the current vehicle energy state and the distance to the gas station or supply station , the threshold value is reset so that the value decreases. The optimal eco-driving support information can be displayed.

  According to the present invention, it is possible to provide eco-driving travel advice according to the energy state of the vehicle.

It is a figure which shows the structure of the eco-drive assistance system of Example 1. FIG. 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 vehicle power from a vehicle speed. It is a figure for demonstrating eco-bar display, (A) is an example which displayed the bar display in the HV eco-operation area, (B) is an example which displayed the bar display in the eco-operation area, (C) is This is an example in which the bar display is displayed in the non-eco-operation area, and (D) is an example in which the bar display is displayed in the regenerative operation area. It is a figure which shows the map prepared for calculation of eco-drive state quantity. It is a figure for demonstrating the correction method of an eco determination threshold value, and is a figure which shows the case where multiple maps for correction | amendment are provided. It is a figure for demonstrating the correction method of an eco judgment threshold value, and is a figure which shows the case where the map by which the correction | amendment according to the truncation level of a fuel was performed is prepared. It is a figure for demonstrating the correction method of an eco-determination threshold value, and is a figure which shows the case where the correction value according to a truncation level is calculated | required from a table. (A) shows a map with the eco judgment threshold corrected in the high speed range, (B) shows a map with the eco judgment threshold corrected in the low speed range, and (C) shows the eco judgment in the high speed range and the low speed range. It is a figure which shows the map which correct | amended the threshold value. It is a flowchart which shows the process sequence of an eco judgment part. It is a flowchart which shows the process sequence of display content determination. 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 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 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.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, the configuration of the present embodiment will be described with reference to FIG. FIG. 1 shows the configuration of an eco-driving support system 1A that supports eco-driving.
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, a hybrid ECU (hereinafter referred to as HV-ECU) 20 that controls a hybrid system, Meter ECU 30 that controls display on indicator panel 40, motor / generator ECU 50 that controls motor / generator, power management ECU 60 that manages power supply, navigation ECU 70 that controls navigation device, and battery management It has a system configuration in which the battery ECU 80 is connected by an in-vehicle communication bus. The hybrid system is a system that drives and controls the engine and the motor so that the hybrid vehicle can operate most efficiently. The HV-ECU 20, the power train ECU 10, the motor / generator ECU 50, and the like shown in FIG. included.
FIG. 1 also shows a powertrain ECU 10, an HV-ECU 20, a meter ECU 30, a motor / generator ECU 50, a power management ECU 60, a navigation ECU 70, and a battery ECU 80 as ECUs connected to the in-vehicle communication bus. However, 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 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. . The power train ECU 10 controls an actuator such as an injector or an ignition coil based on the calculation result.
Further, the powertrain ECU 10 obtains the average fuel consumption from the average value of the travel distance per predetermined time and the fuel consumption required for travel of this distance, and the fuel consumption measured by the average fuel consumption and the fuel remaining amount sensor. The cruising range that can be driven by the engine is calculated from the remaining amount. The calculated cruising distance is notified to the eco judgment unit 22 of the HV-ECU 20.

  The HV-ECU 20 controls and controls the battery ECU 80, the engine ECU (not shown), the motor / generator ECU 50, and the like so that the hybrid vehicle can operate most efficiently. In the present embodiment, the HV-ECU 20 has a function as an eco-driving support device, and the HV-ECU 20 is provided with an eco judgment unit 22 in addition to the HV control unit (vehicle power calculation means) 21.

The HV control unit 21 inputs sensor signals measured by the various sensors 2 and signals from other ECUs, and generates a control signal for controlling the hybrid system. The generated control signal is output to the powertrain ECU 10 and the motor / generator ECU 50.
In addition, the HV control unit 21 generates an HV state signal indicating the state of the hybrid system. The HV state signal includes vehicle power, vehicle limit output power, battery charging permission power, and the like. The generated HV state signal is output to the eco judgment unit 22.

The eco judgment unit 22 receives the HV state signal output from the HV control unit 21 and the sensor signals measured by the various sensors 2. The sensor signal input to the eco judgment unit 22 includes an accelerator opening measured by an accelerator opening sensor (accelerator opening detecting means), a vehicle speed measured by a vehicle speed sensor (vehicle speed detecting means), and a shift position sensor (invalid). The shift position detected by the figure), the state of the switch for switching the vehicle control mode (power mode, sport mode, etc.), the fuel remaining amount measured by the fuel remaining amount sensor for detecting the fuel remaining amount in the fuel tank, etc. Can be mentioned.
The eco judgment unit 22 calculates an eco driving state quantity representing the eco degree of the driving state of the vehicle based on the input HV state signal and the sensor signal. Details of the eco-driving state quantity will be described later.
Further, the eco judgment unit 22 obtains an eco judgment threshold value for judging whether or not the driving state of the vehicle is in the eco driving state, and compares it with the calculated eco driving state quantity, so that the driving state of the vehicle is ecological. It is determined whether the vehicle is in a driving state or a non-eco driving state. Details of this processing will also be described later.
Further, the eco determination unit 22 determines whether or not it is necessary to reduce the fuel consumption based on information acquired from sensors or other ECUs. If it is determined that the fuel consumption needs to be reduced, the eco determination threshold value is corrected in order to further reduce the fuel consumption. Details of this processing will also be described later.
The eco determination unit 22 outputs an eco state signal indicating the eco driving state amount, a determination result of determining whether or not the vehicle is currently in the eco driving state, and the like to the notification control unit 31 of the meter ECU 30.

The meter ECU 30 is an ECU that controls the display of the indicator panel 40. In particular, in this embodiment, the meter ECU 30 acquires an eco state signal from the eco judgment unit 22, and the eco display unit 41 of the indicator panel 40 based on the eco state signal. Display the eco-drive status display in real time.
The indicator panel 40 is provided with an eco display unit 41 that displays whether or not the vehicle is in an eco driving state. The eco display unit 41 displays the state of eco driving in real time according to the control of the notification control unit 31. Specific display contents of the eco display unit 41 will be described later.

  The motor / generator ECU 50 controls driving of the motor / generator in accordance with various state signals and various control signals output from the HV-ECU 20.

A power management ECU (electric load detection means) 60 controls power supply to electrical components such as a display, a navigation device, an audio device, an air conditioner (A / C), and a light.
In addition, the power management ECU 60 calculates the total amount of electricity used by the electrical component, and notifies the eco judgment unit 22 of the HV-ECU 20 of this as electric load utilization information.

The navigation ECU 70 controls a navigation device (not shown). The navigation ECU 70 determines current position information from a GPS signal from a GPS information receiving unit (not shown), and creates a map image for navigation from the map information stored in the map information storage unit of the navigation device. The created map image is displayed on a display unit (not shown).
In addition, the navigation ECU 70 notifies the HV-ECU 20 of navigation information. The navigation information includes own vehicle position, gas station information, map concessions, gas station business hours information, road gradient information, traffic jam information, current time information, and the like.

  The battery ECU 80 calculates a remaining battery capacity indicating how much battery capacity remains by detecting a current value or a voltage value of a battery (not shown). The calculated battery remaining amount is notified to the HV-ECU 20.

  FIG. 2 shows a hardware configuration of the ECU shown in FIG. These ECUs 20, 10, 30, 50, 60, 70, and 80 have a ROM 26 that records a program for realizing control processing by the ECU, and a central process that reads the program stored in the ROM 26 and executes the processing. It has a device (CPU) 25, a RAM 28 for storing data used for calculation, a data input / output unit 27, and the like. When the CPU 25 reads the program stored in the ROM 26 and performs the calculation, the eco judgment unit 22 including the eco driving state quantity calculating means, threshold value setting means, judging means, notifying means, and obtaining means of the present invention becomes HV−. It is constructed in the ECU 20.

Next, the amount of eco-driving state generated by the eco judgment unit 22 will be described.
In this embodiment, the eco-driving state quantity is calculated based on the vehicle power. 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 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. The vehicle power is generated by the HV control unit 21 and is output from the HV control unit 21 to the eco determination unit 22.
The eco judgment unit 22 first acquires the vehicle speed from the various sensors 2 and also acquires the vehicle power from the HV control unit 21. Next, with reference to the eco determination threshold map shown in FIG. 3, an upper limit value of vehicle power that can be determined that the vehicle is in the eco driving state at the current vehicle speed (hereinafter, this value is referred to as an eco determination threshold Call). In this eco judgment threshold map, an eco judgment threshold set in accordance with the vehicle speed is recorded. The eco determination threshold value map also records vehicle power (hereinafter referred to as engine start threshold value G) that is set according to the vehicle speed and that requires engine start.
The eco determination unit 22 refers to the eco determination threshold map shown in FIG. 3 and obtains the vehicle power eco determination threshold and the engine start threshold from these values and the HV control unit 21. The eco-driving state quantity is calculated based on the current vehicle power. A specific method of calculating the eco-drive state quantity will be described with reference to FIG.

4A to 4D show an example of the eco bar display 60 displayed on the eco display unit 41 of the indicator panel 40. FIG.
The eco bar display 60 is displayed on the eco display unit 41 by creating a display image in the notification control unit 31 of the meter ECU 30 based on an eco state signal or the like notified from the eco determination unit 22.
The eco bar display 60 graphically displays the eco driving state quantity as a relative quantity with respect to the eco judgment threshold value. Further, the eco-driving state quantity is graphically displayed as a relative quantity with respect to the engine start threshold value G.

  As shown in FIGS. 4 (A) to 4 (D), the eco bar display 60 includes a bar display 61 of an eco driving state amount requested by the driver and an HV eco driving area 62 (FIGS. 4 (A) to 4). (D) O-A section), eco-operation area 63 (A-B section shown in FIGS. 4A to 4D), and non-eco-operation area 64 (FIG. 4A-Figure). 4 (D), a regenerative operation region (between OP shown in FIGS. 4A to 4D) 65, and an engine start threshold (FIG. 4A). -G point shown in Drawing 4 (D)) and an eco judgment threshold (B point shown in Drawing 4 (A)-Drawing 4 (D)) are displayed.

FIG. 4A shows an example in which an eco-driving state quantity bar display 61 is displayed in the HV eco-driving area 62. When the bar display 61 of the eco-drive state quantity is displayed in the HV eco-drive area 62, the vehicle is running with a motor. In the HV eco-drive region 62, the eco-drive state quantity is displayed as a relative amount of the current vehicle power generated in the vehicle with respect to the engine start threshold value G.
A formula for calculating the amount of eco-drive state in the HV eco-drive region 62 is shown below.
Eco-drive state quantity = (current vehicle power / engine start threshold) x 50 [%] (1)
The upper limit value of the HV eco-operation region 62 is the engine start threshold G. The engine start threshold value G is a threshold value for starting the engine when the vehicle power required by the driver becomes higher than the engine start threshold value G.

FIG. 4B shows an example in which an eco-drive state quantity bar display 61 is displayed in the eco-drive region 63. When the vehicle power required by the driver exceeds the engine start threshold value G, the eco-drive state quantity is displayed in the eco-drive area 63. That is, when the engine is in the start state, the eco-drive state quantity is displayed on the boundary of the engine start threshold G or on the side where the eco degree is worse than the engine start threshold G.
When the bar display 61 of the eco-drive state quantity is displayed in the HV eco-drive region 62, the vehicle travels with the motor and the engine, indicating that the drive state of the vehicle is in the eco-drive state.
In the eco-driving region 63, the eco-driving state quantity is obtained by the following formula (2) using the current vehicle power of the vehicle, the engine start threshold value, and the eco-decision threshold value.
Eco-drive state quantity = {(current vehicle power−engine start threshold) / eco determination threshold−engine start threshold} × 50 [%] + 50 [%] (2)

FIG. 4C shows an example in which the eco-display state quantity bar display 61 is displayed in the non-eco-operation area 64. When the vehicle power required by the driver exceeds the eco determination threshold value, the eco driving state amount is displayed in the non-eco driving region 64. When the bar display 61 of the eco-drive state quantity is displayed in the non-eco-drive region 64, it indicates that the vehicle is in the non-eco-drive state.
The amount of eco-drive state in the non-eco-drive region 64 is also obtained by the above-described equation (2).

FIG. 4D shows an example in which the bar display 61 of the eco-driving state quantity is displayed in the regenerative operation area 65. When the driving state of the vehicle is in a regenerative driving state by an operation such as regenerative braking, an eco-driving state amount bar display 61 is displayed in the regenerative driving region 65.
The eco-driving state quantity in the regenerative operation area 65 is obtained by the following equation (3).
Eco-driving state quantity = (current vehicle power / regeneration limit value) × −100 [%] (3)
The regeneration limit value is set to a limit value of the amount of power that can be generated by the generator by regeneration operation, or a limit value that can charge the battery.

  4 (A) to 4 (D) is an origin position, and indicates a boundary line between the eco operation region 63 and the regenerative operation region 65. When the eco-driving state quantity is displayed at point O, it indicates that the eco-driving state quantity is 0%.

  The engine start threshold G varies depending on the vehicle speed, the remaining battery level, etc., and the minimum value is 0 [kW]. That is, when the engine start threshold value is 0 [kW], the same 0 [kW] is expressed at the O point and the A point.

Further, the eco-driving state quantity may be calculated from a map shown in FIG. By calculating the eco-driving state quantity using the map, the calculation of the eco-driving state quantity can be simplified.
In the map shown in FIG. 5, the horizontal axis represents vehicle power [kW], and the vertical axis represents eco-driving state quantity [%]. The point A ′ shown in the map indicates the engine start threshold value. Point A represents a display change threshold value for switching the bar display 61 from the HV eco-operation region 62 to the eco-operation region 63. The eco-driving state quantity at points A ′ and A indicates 50 [%].
Further, the point B shown in the map indicates the eco determination threshold value. The eco-driving state quantity at point B is 100 [%]. Point C indicates a state where the eco-drive state quantity is 150 [%], and point P indicates a regeneration limit value. The eco-driving state quantity at point P represents −100 [%].
Note that Px <Ox ≦ Ax ≦ A′x ≦ Bx <Cx. Px is the X coordinate value of point P shown in the map, Ox is the X coordinate value of O (origin) shown in the map, Ax is the X coordinate value of point A shown in the map, and A'x is the X coordinate value of point A 'shown in the map The coordinate value, Bx, the X coordinate value of point B shown in the map, and Cx, the X coordinate value of point C shown in the map.

The eco determination unit 22 according to the present embodiment determines whether or not the fuel consumption needs to be cut down. If the eco determination unit 22 determines that the fuel consumption needs to be cut down, the display state of the eco bar display 60 is changed. . The display state is switched by switching or correcting an eco determination threshold value for determining eco driving.
First, the eco determination unit 22 obtains the cruising distance of the vehicle from the remaining fuel amount acquired from the remaining fuel amount sensor and the remaining battery amount acquired from the battery ECU 80. The calculation method of the cruising distance can be obtained by referring to a map that records the cruising distance based on the remaining fuel amount and the remaining battery amount.
Next, the eco judgment unit 22 compares the obtained cruising distance with the distance information to the refuelable filling station acquired as navigation information. It is determined whether or not it is necessary to cut the fuel consumption based on the comparison results of these distances, the traffic jam information, the gradient information of the guidance route, the electricity usage status of the electrical components, and the like. If it is determined that truncation of the fuel consumption is necessary, a truncation level for truncating the fuel is set.

The eco judgment unit 22 sets the fuel truncation level according to the distance from the current position of the vehicle to the nearest refueling station (or the battery can be charged or replaced). For example, if the distance from the current position to the nearest refueling station is far, set the fuel consumption truncation level to a large value, and if the distance from the current position to the nearest refueling station is short, Set the fuel consumption truncation level low. It should be noted that the fuel truncation level may be changed according to the number of refueling stations present within a predetermined distance.
In addition, the eco judgment unit 22 changes the truncation level of the fuel consumption according to the number of gradients present on the guide route to the refueling station where refueling is possible.
For example, if there are many slopes to the gas station, set the truncation level for fuel consumption to a large value, and if the number of slopes to the gas station is a small number, Set a lower truncation level. In addition to the number of gradients, the truncation level of fuel consumption may be changed depending on the gradient level, the gradient length, and the like.
In addition, the eco judgment unit 22 changes the fuel truncation level according to the electricity usage status of the electrical component.
The fuel consumption truncation level is changed based on the electrical load utilization information of the electrical component acquired from the power management ECU 60. For example, when the amount of electricity used by the electrical component is large, the truncation level for fuel consumption is set large, and when the amount of electricity used by the electrical component is small, the truncation level for fuel consumption is set small.

When determining the truncation level of fuel consumption, the eco determination unit 22 corrects or changes the eco determination threshold value according to the determined truncation level.
There are a plurality of methods for correcting or changing the eco judgment threshold. These methods will be described with reference to the drawings.
First, in the method shown in FIG. 6, a plurality of correction maps in which correction values for correcting the eco determination threshold value are recorded are prepared in accordance with the fuel consumption truncation level. These correction value maps are recorded in the ROM 26 or RAM 28 shown in FIG. The eco judgment unit 22 selects a correction map for correcting the eco judgment threshold according to the determined truncation level (see A: Selection of correction map shown in FIG. 6). Then, when the vehicle speed from the vehicle speed sensor is input, the correction value of the eco determination threshold value corresponding to the vehicle speed is obtained with reference to the selected correction map (see B: acquisition of correction value shown in FIG. 6).
Further, the eco judgment unit 22 obtains an eco judgment threshold value corresponding to the vehicle speed measured by the vehicle speed sensor with reference to the eco judgment threshold map (C: reference to acquisition of eco judgment threshold value shown in FIG. 6). ).
The eco determination unit 22 corrects the obtained eco determination threshold value with the correction value obtained from the correction map (see D: correction of eco determination threshold value shown in FIG. 6). In the example illustrated in FIG. 6, the eco determination threshold value is 30 [kW] and the correction value is 5 [kW]. The eco judgment unit 22 subtracts 5 [kW] from the eco judgment threshold value 30 [kW], and outputs the subtracted value 25 [kW] as a corrected eco judgment threshold value.

In the method shown in FIG. 7, a map in which correction values are recorded is not prepared, but a plurality of eco determination threshold maps corresponding to the truncation level are prepared, and eco determination is performed according to the truncation level. Select a threshold. These maps are also recorded in the ROM 26 or RAM 28 shown in FIG.
The eco determination threshold value recorded in the eco determination threshold map shown in FIG. 7 is a threshold value that has been corrected according to the fuel truncation level.
When the eco determination unit 22 determines the truncation level of fuel consumption as shown in FIG. 7, the eco determination unit 22 selects an eco determination threshold map corresponding to the determined truncation level (A: eco determination threshold map shown in FIG. 7). See the selection of Next, the eco judgment unit 22 inputs the vehicle speed from the vehicle speed sensor, refers to the selected eco judgment threshold map, and obtains the eco judgment threshold according to the inputted vehicle speed (B shown in FIG. 7). (Refer to Obtaining the Eco judgment threshold)

In the method shown in FIG. 8, a table in which correction values for correcting the eco determination threshold value are recorded is prepared, and correction values corresponding to the truncation level are obtained from the table. These tables are also recorded in the ROM 26 or RAM 28 shown in FIG.
When the eco determination unit 22 determines the fuel truncation level, the eco determination unit 22 acquires a correction value according to the determined truncation level with reference to the table (see A: acquisition of correction value shown in FIG. 8). The correction value recorded in the table shown in FIG. 8 is set to a uniform value according to the fuel truncation level regardless of the vehicle speed.
When the vehicle speed is input from the vehicle speed sensor, the eco determination unit 22 obtains an eco determination threshold value based on the input vehicle speed (see B: acquisition of the eco determination threshold value shown in FIG. 8). Next, the eco judgment unit 22 subtracts the correction value from the obtained eco judgment threshold (see C: correction of the eco judgment threshold shown in FIG. 8), and makes an eco judgment according to the fuel truncation level. Find the threshold.

  It should be noted that since the fuel efficiency is deteriorated when the vehicle speed is in the high speed range and the low speed range, the correction of the eco determination threshold value may be set to increase the correction value in the high speed range or the low speed range. Further, the correction value may be increased in both the high speed range and the low speed range. FIG. 9A shows the eco judgment threshold value greatly corrected in the high speed range, FIG. 9B shows the eco judgment threshold value greatly corrected in the low speed range, and FIG. Indicates an eco determination threshold value that is largely corrected in the high speed range and the low speed range.

In addition, when the eco-decision unit 22 of the present embodiment starts fuel truncation, the eco-determination unit 22 notifies the driver that fuel trimming control is being performed. The method of notifying the driver can be changed as appropriate according to the fuel truncation level.
For example, if the fuel truncation level is in 5 stages from level 1 to level 5, the notification method is changed in 5 stages of predictive notification, current status notification, alert, warning, and driving support set for each level. To do.
The level 1 sign notification warns that the situation in which the fuel consumption must be reduced is near, and in this level 1, for example, the display color of the eco bar display 60 is changed to normal.
The level 2 current status notification notifies the driver that control for reducing fuel consumption is started. When the eco-driving state quantity becomes larger than the eco-judgment threshold value, a warning sound is given. .
Level 3 alerts indicate that the level of fuel consumption reduction has increased by one step compared to Level 2 current notifications. Voice guidance is provided and a message is displayed on the display. Call attention. For example, if a message such as “The amount of remaining gasoline is low” is output by voice, or displayed on the display unit and the eco-driving state amount exceeds the eco-judgment threshold, it is larger (or has a longer alarm time). ) Output an alarm sound to alert the driver.
The level 4 warning indicates that the level of fuel consumption reduction has been raised further than the level 3 alert, and unlike the level 3 alert, the driver urges the driver to ensure eco-friendly driving. Output or display on the display. Further, the level of the alarm sound is further increased from the level 3 alert.
Level 5 driving support is a state in which the fuel consumption reduction level is set to the highest level, and issues an operation instruction to the driver's accelerator operation. For example, a beep sound is output every unit time so that the speed is slowly increased at the time of start so that the time until reaching a predetermined speed can be indicated. As an example, a beep sound is generated at intervals of 1 second to instruct the vehicle speed to be about 20 k / m in 5 seconds.

  In this way, in this embodiment, by changing the advice and warning method to the driver according to the reduction level of the fuel consumption, it is possible to extend the cruising range, and problems such as occurrence of stuck on the road occur. The rate can be reduced.

Next, the processing procedure of the eco judgment unit 22 for displaying the eco bar display 60 on the eco display unit 41 of the indicator panel 40 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 22 determines whether or not the input data is normal (step S1). The eco determination unit 22 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 22 determines that the measurement data is not normal (step S1 / NO), it calculates 0% as the eco driving state amount at the time of failure of the sensor 2 (step S8).

Next, when it is determined that the measurement data is normal (step S1 / YES), the eco determination unit 22 determines whether or not the state of the vehicle is in a state where the eco driving display (eco bar display 60) can be provided. (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.
If the eco judgment unit 22 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 22 obtains an eco judgment threshold with reference to the map shown in FIG. 3 (step S3). In this embodiment, the eco determination threshold value is calculated based on the vehicle speed input from the sensor 2. The eco judgment unit 22 stores the eco judgment threshold map shown in FIG. 3 in a memory, and makes an eco judgment that is the upper threshold of vehicle power from the vehicle speed measured by the vehicle speed sensor of the various sensors 2. Find the threshold. Note that the map shown in FIG. 3 is calculated by adaptation.

  Next, the eco judgment unit 22 calculates the eco driving state quantity from the eco 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 any of the above-described formulas (1), (2), and (3).

Next, the eco determination unit 22 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 is lower than 2 km / h, it is determined that the vehicle is in a stopped state, and when the vehicle speed is higher than 4 km / h, it is determined that the vehicle is in a traveling state. Further, when the vehicle speed is 2 km / h or more and 4 km / h or less, the stop determination is not performed immediately, and thereafter, it 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 22 determines the display state of the bar display 61 from the calculated eco driving state amount. Details of this processing will be described later with reference to the flowchart shown in FIG.
When the display state of the eco bar display 60 is determined, the eco determination unit 22 notifies the meter ECU 30 of an eco state signal including information indicating the eco driving state amount, the display state of the eco bar display 60, and the like. The meter ECU 30 causes the eco display unit 41 to display the eco bar display 60 based on the eco state signal notified by the eco determination unit 22.

Next, a procedure for determining the display state of the eco bar display 60 and giving travel advice in accordance with the display state will be described with reference to the flowchart shown in FIG.
First, the eco determination unit 22 acquires the remaining fuel amount from the remaining fuel sensor (step S11) and also acquires the remaining battery amount from the battery ECU 80 (step S12). Further, navigation information is acquired from the navigation ECU 70 (step S13). The navigation information includes own vehicle position, gas station information, map information, gas station business hours information, road gradient information, traffic jam information, current time information, and the like.

  Next, the eco determination unit 22 calculates the cruising distance of the vehicle from the acquired remaining fuel amount and the remaining battery amount acquired from the battery ECU 80. The cruising distance can be obtained by referring to a map that records the cruising distance from the remaining fuel amount and the remaining battery amount.

Next, the eco judgment unit 22 detects a filling station candidate capable of refueling based on the acquired navigation information (step S15). The eco-judgment unit 22 detects the nearest gas station that can be refueled from the position information of the gas station, the business hours information of the gas station, and the current time.
When a fueling station that can be refueled is detected, the eco judgment unit 22 compares the calculated cruising distance and the distance to the nearest fueling station that can be refueled to determine whether or not it is necessary to cut fuel consumption. (Step S16). If it is determined that truncation of the fuel consumption is not necessary (step S16 / NO), the eco determination unit 22 ends this process.
Further, when the eco judgment unit 22 determines that the fuel consumption needs to be truncated (step S16 / YES), the eco judgment unit 22 sets a truncation level for truncating the fuel consumption (step S17). This truncation level is also set based on the cruising range and the distance to the nearest refueling station.

Next, the eco determination unit 22 refers to the map information acquired as the navigation information, and counts the number of gradients between the current position and the refueling station that can be refueled (step S18). Next, the eco determination unit 22 determines whether or not the truncation level needs to be corrected based on the number of gradients, the traffic jam information acquired as the navigation information, and the electrical usage information of the electrical component (step S19). . If the number of gradients in the guide route is greater than or equal to a predetermined value, the fuel efficiency will deteriorate, so the truncation level will be reset higher. In addition, the truncation level is set high because it leads to deterioration of fuel consumption even when traffic jams occur. Furthermore, when the electric power consumption of the electrical component is high, it leads to deterioration of the battery and fuel consumption, so the truncation level is set high. If it is determined that the truncation level needs to be corrected based on the number of gradients, traffic jam information, and electricity usage information of the electrical component (step S19 / YES), the eco judgment unit 22 corrects the truncation level (step S20).
Next, the eco judgment unit 22 changes the setting so as to correspond to the truncation level at which the warning or driving advice for the driver is set (step S21).
Next, the eco judgment unit 22 corrects the eco judgment threshold (step S22). For example, as shown in FIG. 6, a correction map corresponding to the truncation level is selected, and the correction value is obtained from the vehicle speed measured by the vehicle speed sensor with reference to the selected correction map. Similarly, the eco judgment unit 22 refers to the eco judgment threshold map and obtains the eco judgment threshold from the vehicle speed measured by the vehicle speed sensor. Next, the eco judgment unit 22 corrects the obtained eco judgment threshold value using the correction value. Then, the eco judgment unit 22 causes the eco display unit 41 to display the relative amount of the vehicle power with respect to the corrected eco judgment threshold value. When the vehicle power becomes larger than the eco determination threshold value, the eco determination unit 22 displays a warning display or outputs a warning sound according to the setting in step S21 (step S23). For example, the eco judgment unit 22 notifies the navigation ECU 70 of warning display information and warning information. Under the control of the navigation ECU 70, a warning display is displayed on a display screen of a navigation device (not shown) or a warning sound is output.

As described above, in this embodiment, the eco determination threshold value for determining whether or not the driving state of the vehicle is in the eco driving state, the electric load usage status, the remaining fuel amount, the remaining battery amount, the traffic information, the road information, By changing the distance depending on the distance to the nearest refueling station, etc., it is possible to cut the fuel when it is necessary to extend the cruising range. For this reason, generation | occurrence | production of the engine stall etc. on a road can be suppressed.
In addition, it is determined whether fuel truncation is necessary or not, and by switching the eco judgment threshold value, if fuel truncation is not necessary, comfortable saving Travel advice for fuel-efficient driving is possible, and when fuel truncation is necessary, travel advice for reducing fuel consumption to the maximum can be provided.

In the first embodiment described above, the truncation level at which the fuel is cut down based on the comparison result comparing the cruising range and the distance to the gas station, and the traffic information, the gradient information of the guidance route, the electrical usage status of the electrical components, and the like. Was set.
The eco judgment unit 22 of the present embodiment sets the truncation level of the fuel consumption based on the electrical load usage status of the electrical component acquired from the power management ECU 60. When the eco-judgment unit 22 sets the truncation level of fuel consumption, the eco-judgment threshold value is corrected or changed based on the set truncation level. The corrected or changed eco judgment threshold is set as a new eco judgment threshold. When the eco judgment threshold value is set, the eco judgment unit 13 compares the set eco judgment threshold value with the eco driving state quantity of the vehicle and judges whether or not the driving state of the vehicle is in the eco driving state. To do.

  Similarly to the first embodiment described above, the eco determination unit 22 notifies the driver that the fuel cut-down control is being performed when the fuel cut-off is started. As a specific example of the notification method, the same method as in the first embodiment can be used.

  Also in this embodiment, when it is determined that it is necessary to cut fuel consumption, it is possible to cut the fuel consumption and extend the cruising range.

In the above-described first and second embodiments, the eco-driving support system mounted on the hybrid vehicle including the engine and the motor has been described. In this embodiment, a case where an eco-driving support system is mounted on a vehicle mounted with only an engine will be described.
The eco-driving support system 1B shown in FIG. 12 has a configuration in which a powertrain ECU 10 that controls the engine and the transmission, a meter ECU 30 that controls the display of the indicator panel 30, and the power management ECU 60 described above are connected by an in-vehicle communication bus. Have. Note that the meter ECU 30 and the power management ECU 60 have the same configuration as that of the first embodiment described above, and thus detailed description thereof is omitted. In this embodiment, the power train ECU 10 is provided with a function as an eco-driving support device.

The powertrain ECU 10 includes an engine control unit 11 that controls the engine as a control device, and a transmission control unit 12 that controls the transmission. 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, the actuator 3 such as an injector or an ignition coil is controlled based on the calculation result.
Further, the engine control unit 11 and the transmission control unit 12 output a signal indicating the control state of the engine and the transmission (hereinafter referred to as a powertrain control state signal) to the eco judgment unit (described later) 13. In order to display a more detailed eco state, not only the raw sensor information but also various control information of the ECU that controls the vehicle is transmitted.
The sensor signals input from the various sensors 2 by the powertrain ECU 10 include, in addition to those described above, 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. Examples include a shift position detected by a position sensor (not shown), a switch state indicating a switch state for switching a vehicle control mode (power mode, sports mode, etc.), and the like.

  Further, the powertrain ECU 10 is provided with an eco judgment unit 13. Based on the driving state of the vehicle, the eco determination unit 13 calculates a determination threshold value and an eco driving state amount that represents a ratio to the determination threshold value. Further, the eco judgment unit 13 outputs an eco state signal representing the eco driving state amount to the meter ECU 30.

An eco-driving state amount calculation procedure and an eco determination threshold will be described with reference to FIG.
First, the eco judgment unit 13 inputs the current vehicle speed (km / h) and the accelerator opening (%) of the vehicle using various sensors 2. Next, the eco judgment unit 13 refers to the map shown in FIG. 13 and obtains an eco judgment threshold value that can be judged as being in an eco driving state at the current vehicle speed as an accelerator opening (%). The map shown in FIG. 13 shows the relationship between the vehicle speed and the threshold value of the accelerator opening at which it can be determined that the vehicle is in the eco-driving state (hereinafter referred to as the eco determination threshold value). When the eco judgment unit 13 obtains the eco judgment threshold value from the map, the eco opening is measured by dividing the acele opening measured by the various sensors 2 by the judgment threshold value obtained from the map, and the divided value is multiplied by 100 for eco driving. The state quantity (%) is calculated.
Eco-drive state quantity = ((current accelerator opening / judgment threshold value) x 100) (%) (4)

The eco judgment unit 13 that has obtained the eco judgment threshold acquires the electrical load usage status of the electrical component from the power management ECU 60. Based on the acquired electric load usage situation, the eco judgment unit 13 sets the truncation level of the fuel consumption. Similar to the first embodiment described above, when the amount of electricity used by the electrical component is large, the truncation level of fuel consumption is set large, and when the amount of electricity used by the electrical component is small, the truncation level of fuel consumption is set. Set to a smaller value.
When the eco-judgment unit 13 sets the truncation level of fuel consumption, the eco-judgment threshold value is corrected or changed in accordance with the set truncation level. The corrected or changed eco judgment threshold is set as a new eco judgment threshold. When the eco judgment threshold value is set, the eco judgment unit 13 compares the set eco judgment threshold value with the eco driving state quantity of the vehicle and judges whether or not the driving state of the vehicle is in the eco driving state. To do.

  In addition, as in the first embodiment described above, the eco determination unit 13 notifies the driver that fuel trimming control is being performed when fuel trimming is started. As a specific example of the notification method, the same method as in the first embodiment can be used.

  Thus, even in a vehicle equipped with an engine, if it is determined that truncation of fuel consumption is necessary, truncation of fuel consumption is performed and the cruising distance can be extended.

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 above-described embodiment, the eco judgment unit 22 (13) is provided in the HV-ECU 20 and the powertrain ECU 10, but the eco judgment unit 22 may be provided in the meter ECU 30 as shown in FIG. Further, although not shown, the eco judgment unit 22 (13) may be provided in the navigation ECU 70.

Further, in the example of the eco bar display 60 shown in FIG. 4, only the regenerative operation area 65 is displayed as the display area on the regeneration side. However, as shown in FIG. 15A, the non-eco operation on the regenerative operation area 65 side is displayed. The area 66 may be displayed. This non-eco-operating region 66 shows a state where not only the regenerative brake but also a brake operation using a mechanical brake is being performed.
Further, as shown in FIG. 15A, together with the eco bar display 60, an indication of an eco lamp 70 that displays whether the driving state of the vehicle is in an eco driving state by turning on / off a lamp such as an LED is displayed. Good.
Furthermore, instead of the eco bar display 60 described above, a circle display such as a speedometer shown in FIG.

  In the above-described embodiment, the eco judgment unit 22 (13) is provided in the vehicle control device (HV-ECU), 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 vehicle speed and the eco-driving state quantity obtained by the eco-judgment unit 22 (13) are recorded on a recording medium or the like, and the recorded contents of the recording medium are read into the computer device after getting off the vehicle, so A typical change may be displayed.

1A, 1B, 1C Eco-driving support system 2 Various sensors 10 Powertrain ECU
20 HV-ECU
21 HV control unit 22 Eco judgment unit 30 Meter ECU
31 Notification Control Unit 40 Indicator Panel 41 Eco Display Unit 50 Motor / Generator ECU
60 Power management ECU
70 Navi ECU
80 battery ECU

Claims (3)

Vehicle speed detection means for detecting the vehicle speed;
Vehicle power calculation means for calculating vehicle power generated in the vehicle;
Based on the vehicle power calculated by the vehicle power calculating means, an eco driving state quantity calculating means for calculating an eco driving state quantity representing an eco degree of the driving state of the vehicle;
An electrical load detection means for detecting the usage status of the electrical load;
And the vehicle power calculated by the vehicle power calculation unit, wherein based on the usage of the electric load detecting means is detected by the electric load, the vehicle power for determining the operating condition of the vehicle is in the eco-drive state and the threshold value setting means for setting a threshold of,
Threshold correction means for correcting the threshold set by the threshold setting means based on the vehicle speed detected by the vehicle speed detection means;
A determination unit that is corrected threshold above the eco operation state quantity calculated by the eco-drive state quantity calculating means the threshold voltage compensation means,
Informing means for informing the occupant whether or not the current vehicle power is greater than or equal to a threshold based on the determination result by the determining means;
An eco-driving support device. Vehicle speed detection means for detecting the vehicle speed;
An accelerator opening detecting means for detecting an accelerator opening indicating an accelerator pedal depression amount;
An electrical load detection means for detecting the usage status of the electrical load;
The accelerator opening for determining that the driving state of the vehicle is in an eco-driving state based on the vehicle speed detected by the vehicle speed detecting unit and the usage state of the electric load detected by the electric load detecting unit. and the threshold value setting means for setting a threshold of,
Threshold correction means for correcting the threshold set by the threshold setting means based on the vehicle speed detected by the vehicle speed detection means;
Determining means for determining that the accelerator opening detected by the accelerator opening detecting means is equal to or greater than a threshold set by the threshold setting means;
Informing means for informing the occupant whether or not the accelerator opening is equal to or greater than a threshold based on the determination result by the determining means;
An eco-driving support device. Having acquisition means for acquiring current position information of the vehicle and map information around the vehicle from the navigation device;
The threshold correction means determines that it is necessary to cut fuel based on the distance between the current position of the vehicle and a fueling station where fuel can be supplied, or a supply station where battery replacement or charging is possible. The eco-driving support apparatus according to claim 1 , wherein the threshold value is reset so that the value becomes lower .

Images