JP4863217B2 - Saving amount output device and navigation device - Google Patents

Description

  The present invention relates to a savings amount output device and a navigation device, for example, a hybrid vehicle that presents a saving amount of fuel or power to a user.

Interest in hybrid vehicles that combine an engine (internal combustion engine) and a motor (electric motor) has increased due to increased environmental concerns and high crude oil prices.
For example, the hybrid vehicle is driven by a motor in a region where the engine efficiency is low such as when starting, and in a region where the engine efficiency is high such as high speed running, the hybrid vehicle is driven by the engine and a power generator is driven to store electricity. It is intended to improve fuel efficiency by complementarily cooperating the engine.

In recent years, a technique called energy management has been proposed in order to further improve fuel efficiency for such hybrid vehicles.
This technology predicts the travel route scheduled for travel in advance, and schedules the drive distribution of the engine and motor so as to be most efficient. The hybrid vehicle controls the engine and motor according to this schedule. To do.
Thus, for example, when there is a downhill ahead, control is performed such that the battery is discharged by driving the motor before reaching the front, and regenerative power when going downhill is stored as much as possible.
As a description of performing energy management in this way, there is a “hybrid vehicle control device” of the following Patent Document 1.
JP 2005-192319 A

This technique divides a scheduled travel route into a plurality of sections, estimates a travel time in each section, and drives a section having a travel time within a predetermined time by a motor.
As a result, frequent switching between the engine and motor due to changes in vehicle speed can be suppressed.
Thus, in a hybrid vehicle, fuel consumption can be improved by combining an engine and a motor. Moreover, the fuel efficiency can be further improved by performing energy management.

However, by saving fuel in the hybrid vehicle, the user can reduce the fuel cost, but there is a problem in that the user cannot know how much the fuel has been saved.
For this reason, if there is no joy of saving, there is a possibility of driving without worrying about fuel consumption. For example, it has been considered that driving that reduces fuel consumption, such as sudden start and stop, is performed.

  Accordingly, an object of the present invention is to inform the user of the fuel saving effect of the hybrid vehicle.

(1) In order to achieve the above object, according to the first aspect of the present invention, in the hybrid vehicle that generates driving force by the internal combustion engine and the electric motor, the internal combustion engine generated by the internal combustion engine from the fuel consumption by the internal combustion engine. Internal combustion engine travel energy acquisition means for acquiring engine travel energy; motor drive energy acquisition means for acquiring motor travel energy generated by the motor from power consumed by the motor; amount of fuel consumed by the internal combustion engine; Total means for calculating the total amount of electric power consumed by the motor, and calculating the amount of fuel required when the internal combustion engine travel energy and the motor travel energy acquired are generated in another predetermined standard internal combustion engine From the difference between the fuel price calculation means to perform, the calculated total price, and the calculated fuel price, It provides a savings amount calculating means for calculating the amount of money promised, and output means for outputting the savings amount to the calculated savings amount output apparatus characterized by comprising a.
(2) The invention according to claim 2, further comprising charging means for charging electric power by charging from an external power source, wherein the electric motor is driven by the charged electric power. Provide a money output device.
(3) In the invention as set forth in claim 3, the other predetermined standard internal combustion engine is an internal combustion engine of a vehicle that travels only with the driving force of the internal combustion engine. An output device is provided.
(4) In the invention described in claim 4, a unit price acquisition means for acquiring a fuel unit price and a power unit price is provided, and the total unit and the fuel amount calculation unit use the acquired fuel unit price and power unit price. 4. A savings amount output device according to claim 1, wherein the amount of fuel and the amount of electric power are calculated.
(5) The invention according to claim 5, further comprising saving history storage means for storing the history of the calculated saving amount, and the output means displays the stored history. To a saving amount output device according to any one of claims 1 to 4.
(6) In the invention described in claim 6, in the path from the departure place to the arrival place, the driving means for driving the internal combustion engine and the electric motor with a predetermined driving schedule, and the driving schedule without using the driving schedule. Assuming that the internal combustion engine and the electric motor are driven, an estimation means for estimating a fuel consumption amount consumed by the internal combustion engine and an electric power consumption amount consumed by the electric motor, and the estimated fuel consumption amount and electric power The saving amount by the driving means is calculated by comparing the sum of the consumption and the total of the fuel consumption and the power consumption consumed by the driving means driving the electric motor and the internal combustion engine. 6. The apparatus according to claim 1, further comprising: a second saving amount calculation unit; and a second output unit that outputs the saving amount calculated by the second saving amount calculation unit. Providing savings amount output device according to any one of claims of.
(7) The invention according to claim 7 provides a navigation device equipped with the saving amount output device according to any one of claims 1 to 6.

  According to the present invention, the fuel saving effect can be notified to the user by presenting the saved fuel cost to the user.

(1) Outline of Embodiment FIG. 1 is a diagram for explaining the outline of the present embodiment. The hybrid vehicle used in this embodiment drives a motor using a battery charged with an external power source such as a household outlet. Therefore, the power consumption cost can be calculated using the power unit price of the external power source.
First, the hybrid vehicle according to the present embodiment acquires the fuel consumption consumed by the engine and the power consumption consumed by the motor, and also obtains the fuel unit price and the power unit price by reading the network communication or default value (unit price). To do.

Next, the hybrid vehicle calculates the fuel cost consumed from the fuel consumption and the fuel unit price, and calculates the power cost consumed from the power consumption and the power unit price.
In the example of FIG. 1, the fuel cost is 500 yen and the power cost is 100 yen.
Next, the hybrid vehicle calculates travel energy output for travel from the fuel consumption and the power consumption.
In the example of FIG. 1, the travel energy by the engine is A [J], and the travel energy by the motor is B [J].

The hybrid vehicle assumes a comparative engine (comparison program) with a predetermined displacement to compare the fuel consumption of the host vehicle with the fuel consumption of a non-hybrid ordinary vehicle (a vehicle that travels with the driving force of only the internal combustion engine). Yes.
The hybrid vehicle then calculates the amount of fuel required to output the total travel energy of the travel energy by the engine (internal combustion engine) and the travel energy by the motor by the comparative engine.
In the example of FIG. 1, it is calculated that the fuel of D [l] is required to generate the traveling energy of C (= A + B) [J] in the comparative engine.

Next, the hybrid vehicle calculates the cost of the fuel required by the comparative engine, and calculates the fuel cost to be saved by reducing the fuel consumption and the power consumption.
In the example of FIG. 1, the fuel cost of the fuel required for the comparative engine is 1200 yen. Therefore, the fuel saving cost is 1200− (500 + 100) = 600 yen.
The hybrid vehicle notifies the user of the saved fuel cost by screen display or / and voice output (output means).

(2) Details of Embodiment First, a hybrid vehicle used in the present embodiment will be described.
The hybrid vehicle of the present embodiment is called a plug-in hybrid vehicle.
The plug-in hybrid vehicle includes a connection plug that connects to an external power source such as a household outlet, and the battery is charged to the upper limit of charge by the external power source before departure.
Note that the upper limit value and the lower limit value of the charge amount are determined for the battery to prevent deterioration, and the hybrid vehicle repeats charging and discharging within this range. In the following, charging to the upper limit value will be referred to as full charge, and discharging to the lower limit value will be referred to as full discharge.

As described above, the hybrid vehicle according to the present embodiment drives the motor with the battery charged by the external power supply, and has a normal mode and a saving mode for performing energy management as its method.
In the normal mode, the hybrid vehicle travels with the driving force of only the motor after the departure until the battery is fully discharged, and travels with the driving force of only the engine after the battery is discharged.
In this specification, of the motor and engine for obtaining the driving force, the case where the driving force of the motor is used and the driving force of the engine is not used is expressed as “motor only”, and conversely the driving force of the engine When the driving force of the motor is not used and “engine only” is expressed.

  On the other hand, in the saving mode, the hybrid vehicle has a section that travels with a motor (motor travel section), a section that travels while distributing driving force between the motor and the engine (hybrid travel section), and an engine that runs on the planned travel route. A section for traveling (engine traveling section) is set in advance. In this section setting, for example, a section where a large output such as an uphill is expected is set as a hybrid traveling section, so that more efficient energy distribution is achieved, and the battery is set to a fully discharged state upon arrival at the destination. Is done.

Plug-in hybrid vehicles give priority to fully charging and using the battery with commercial power, but since the commercial power rate is cheaper than the fuel, it is possible to reduce the cost required for traveling. .
In particular, since electricity charges are discounted at night, charging at night is more effective.

Next, an ECU (Engine Control Unit) mounted on the hybrid vehicle of the present embodiment will be described with reference to FIG.
Although not shown, the ECU 1 includes a computer using a storage device such as a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and a hard disk, and is stored in the storage device. This is an electronic device that executes various programs such as engine control and saving fuel cost calculation by executing a program that is executed by a CPU.

The ECU 1 includes an energy information acquisition unit 5, a navigation system 8, an energy management system 7, a saved fuel calculation unit 10, a saved fuel display unit 6, and the like, and also includes a communication unit 2, a battery sensor 3, a fuel sensor 4, a map. Connected to DB9 etc.
The communication unit 2 is a communication module such as a mobile phone, a wireless LAN (Local Area Network), a PLC (Power Line Communications), an optical beacon, an FM (Frequency Modulation), and the like via the Internet or other communication networks. It connects to a server device and provides an interface when the ECU 1 communicates with an external server device.

The battery sensor 3 monitors the state of charge (SOC value: State of Charge) of the battery and transmits it to the energy information acquisition unit 5.
The amount of charge of the battery decreases when the motor is driven, and increases due to regenerative power.
The fuel sensor 4 is a fuel meter that detects the volume of fuel in the fuel tank, and transmits the detected amount of fuel to the energy information acquisition unit 5.
The map DB 9 stores a route search map composed of nodes and links, a map for display to the user, and the like.
ECU1 can perform the scheduling driving | running | working by energy management using the map data of map DB9.

The energy information acquisition unit 5 is an interface that connects the communication unit 2, the battery sensor 3, the fuel sensor 4, and the energy management system 7, and the energy management system 7 collects information necessary for calculating the saved fuel cost. In addition, mediation with the communication unit 2, the battery sensor 3, and the fuel sensor 4 is performed.
Moreover, the energy information acquisition part 5 also converts this into a digital signal, when the output value of the battery sensor 3 or the fuel sensor 4 is an analog signal.
The navigation system 8 acquires travel data (current position, time, vehicle speed, etc.) and outputs it to the energy management system 7 or guides a route from the departure point to the destination. In this way, the ECU 1 functions as a navigation device equipped with a savings amount display device.

The energy management system 7 can operate in the normal mode and the saving mode, and controls the driving of the engine and the motor.
In the normal mode, the energy management system 7 first runs the motor until the battery power is used up, and then switches to the engine running. In the saving mode, the energy management system 7 obtains the running state from the navigation system 8 and follows the scheduled schedule. The motor and engine are driven so that the battery power is used up when it reaches.

The saving fuel calculation unit 10 collects information necessary for calculating the saving fuel cost via the energy information acquisition unit 5 and causes the saving fuel display unit 6 to display the calculation result.
The specific processing contents of the saved fuel calculation unit 10 will be described in detail later using a flowchart.

The saved fuel display unit 6 displays the saved fuel cost on a display device such as a liquid crystal display.
In addition to displaying the saved fuel cost for the day, the saved fuel display unit 6 stores past saved fuel costs and can display them in time series.
By displaying the saved fuel cost by the saved fuel display unit 6, the user can realize that the fuel is saved by the hybrid mechanism.

FIG. 3 is a diagram showing an example of the saved fuel cost displayed on the display device by the saved fuel display unit 6.
On the display screen 20, a guidance screen 21 by the navigation system 8 and a saved fuel cost display screen 22 are displayed.
On the guidance screen 21, the host vehicle symbol 101 is displayed on a map, and the current position of the host vehicle and the route to the destination are displayed.

The saved fuel cost display screen 22 displays the saved fuel cost from the departure to the present. This saved fuel cost is updated in real time.
In the example of the figure, the gasoline consumption is 28.8 [l], and the saved gasoline is 5.3 [l]. And 636 yen corresponding to the saved gasoline is displayed as the saved fuel cost.

Although not shown, when the user touches a history button displayed on the saved fuel cost display screen 22, a history screen 25 as shown in FIG. 3B is displayed.
On the history screen 25, the history of past saved fuel costs is displayed in time series. In the example shown in the figure, March 8 saves 126 yen on fuel costs and March 9 saves 98 yen.
In addition, the history display can display the total accumulated fuel cost so far for each day, month, and year as specified by the user. As a secondary effect of this, the user is happy to save energy. It is possible to raise the awareness of energy saving driving.

Next, a procedure in which the fuel saving calculator 10 calculates the fuel saving cost will be described.
First, with reference to the flowchart of FIG. 4, a procedure for the saving fuel calculation unit 10 to collect information necessary for calculating the saving fuel cost will be described.
The following processing may be started by a timer so as to be performed at a preset time, or may be performed by detecting that the user has started the engine.
First, the saved fuel calculation unit 10 acquires the coordinates of the current location by the navigation system 8 (step 5). This is to obtain the fuel unit price in the vicinity of the current location.
Next, the saving fuel calculation unit 10 reads out the fuel corresponding to the vehicle (the fuel type used by the host vehicle, such as gasoline, light oil, etc.) from the storage device and acquires it (step 10).

Next, the saving fuel calculation unit 10 is connected to a server device that can acquire the fuel unit price by using the communication unit 2, and acquires the fuel unit price around the current location (step 15).
If the fuel unit price can be acquired (step 20; Y), the saved fuel calculation unit 10 proceeds to step 40.
On the other hand, when the fuel unit price cannot be acquired (step 20; N), the saving fuel calculation unit 10 acquires the fuel unit price acquired last time (step 25).
In addition, the saving fuel calculation part 10 will memorize | store this in a memory | storage device, if a fuel unit price is acquired, and will use this when a fuel unit price cannot be acquired next time.

When the previous fuel unit price can be acquired (step 30; Y), the saved fuel calculation unit 10 proceeds to step 40.
On the other hand, if the previous fuel unit price could not be acquired (step 30; N), the saved fuel calculation unit 10 acquires the default fuel unit price stored in advance in the storage device from the storage device (step 35).

As described above, after the fuel unit price is acquired, the saving fuel calculation unit 10 is connected to the server device that can acquire the power unit price using the communication unit 2, and acquires the power unit price near the current location (step 40). .
In some cases, the unit price of electric power may change depending on the time zone, such as a midnight discount. In step 40, the unit price of power at the current time may be acquired. Alternatively, the saved fuel calculation unit 10 may be an external power source. The time zone when the battery is charged may be stored and the unit price of power in this time zone may be acquired, or the average unit price of power in each time zone may be used. May be.

When the power unit price can be acquired (step 45; Y), the saved fuel calculation unit 10 waits for the vehicle to start and starts calculating the saved fuel cost.
On the other hand, when the power unit price could not be acquired (step 45; N), the saved fuel calculation unit 10 acquires the power unit price acquired last time (step 55).
In addition, the saving fuel calculation part 10 will memorize | store this in a memory | storage device, if a power unit price is acquired, and will use this when a power unit price cannot be acquired next time.

When the previous power unit price can be acquired (step 60; Y), the saved fuel calculation unit 10 waits for the vehicle to start and starts calculating the saved fuel cost.
On the other hand, if the previous power unit price could not be acquired (step 60; N), the saved fuel calculation unit 10 acquires the default power unit price stored in advance in the storage device from the storage device (step 65). The calculation of the saving fuel cost is started after waiting for the start.
As described above, the saved fuel calculation unit 10 includes unit price acquisition means for acquiring the fuel unit price and the power unit price.
In addition, although the saving fuel calculation part 10 acquired the fuel unit price and the electric power unit price from the server apparatus, this can also be comprised so that a user may input manually.

Next, the calculation procedure of the saving fuel cost will be described using the flowchart of FIG.
The saving fuel calculation unit 10 performs the following processing at predetermined intervals (for example, 1 second) during traveling, and calculates the saving fuel cost in real time.
First, the saved fuel calculation unit 10 acquires fuel consumption by the engine (step 105).
In order to perform this processing, the fuel saving calculation unit 10 acquires and stores the amount of fuel from the fuel sensor 4 when the hybrid vehicle departs. Then, the current amount of fuel is acquired from the fuel sensor 4 during traveling, and the amount of fuel consumed by the engine is calculated by subtracting this from the previously stored amount at the time of departure.

Next, the saved fuel calculation unit 10 acquires the amount of power consumed by the motor (step 110).
In order to perform this process, the saved fuel calculation unit 10 acquires the charge amount from the battery sensor 3 and stores it when the hybrid vehicle departs. Then, the current charge amount is acquired from the battery sensor 3 during traveling, and the power consumption amount in the motor is calculated by subtracting this from the previously stored charge amount at the time of departure.

  In the present embodiment, the amount of power charged by regeneration is included in the power consumption cost even when consumed by the motor, but it is also possible to calculate so as not to include this. In this case, the saving fuel calculation unit 10 detects and stores the charge amount charged in the battery by regeneration using the battery sensor 3, and subtracts the current charge amount and the charge amount due to regeneration from the charge amount at the time of departure. Just do it.

Next, the fuel saving calculation unit 10 calculates the fuel cost and the power cost used so far (step 115), and sums them up.
The saved fuel calculation unit 10 calculates the used fuel cost by multiplying the fuel consumption acquired in Step 105 by the unit price of fuel acquired in Step 15 (or Steps 25 and 35). Is calculated by multiplying the power consumption acquired in step 110 by the power consumption acquired in step 40 (or steps 55 and 65) by the power consumption acquired in the communication unit 2.
As described above, the fuel saving calculation unit 10 includes a fuel consumption amount acquisition unit that acquires the amount of fuel consumed by the internal combustion engine, a power consumption amount acquisition unit that acquires the amount of power consumed by the electric motor, and these internal combustion engines. A total means for calculating the total amount of fuel consumed and the amount of power consumed by the motor is provided.

Next, the fuel saving calculation unit 10 individually obtains the travel energy output from the departure of the engine and motor to the present, and calculates the total value thereof (step 120).
More specifically, the saving fuel calculation unit 10 stores a calculation formula for calculating the running energy output by the engine from the amount of consumed fuel, and a calculation formula for calculating the running energy output by the motor from the consumed electric energy. In these equations, the amount of fuel consumed acquired in step 105 and the amount of power consumed acquired in step 110 are input and summed together to calculate the total value of travel energy.

  As described above, the fuel saving calculation unit 10 uses the internal combustion engine travel energy acquisition means for acquiring the internal combustion engine travel energy generated by the internal combustion engine from the fuel consumption by the internal combustion engine (engine), and the power consumption by the electric motor (motor). Electric motor travel energy acquisition means for acquiring electric motor travel energy generated by the electric motor.

Next, the saved fuel calculation unit 10 calculates the amount of fuel necessary to output the total value of the travel energy calculated in step 120 by the comparison engine (step 125).
More specifically, the fuel saving calculation unit 10 assumes a comparative engine for a normal vehicle in order to compare the hybrid vehicle with a normal vehicle having only an engine having an output capability equivalent to that of the hybrid vehicle. When the travel energy is input, a calculation formula for calculating the amount of fuel required for the comparative engine to output the travel energy is stored.
Then, the saving fuel calculation unit 10 inputs the energy consumption calculated in step 120 to this calculation formula, and calculates the amount of fuel required for the comparative engine.

Next, the fuel saving calculation unit 10 calculates the fuel cost of the fuel required for the comparative engine by multiplying the calculated amount of fuel by the fuel unit price obtained in step 15 (or steps 25 and 35) (step 130). ).
As described above, the fuel saving calculation unit 10 calculates the amount of fuel required when the total of the travel energy generated by the internal combustion engine and the travel energy generated by the electric motor is generated by another predetermined standard internal combustion engine (comparative engine). The fuel amount calculation means for calculating

In the embodiment described above, an engine of a normal vehicle is assumed as the comparative engine, but it can also be an engine of the own vehicle.
Then, the saving fuel calculation unit 10 calculates the saving fuel cost by subtracting the fuel cost and the power cost calculated in step 115 from the fuel cost calculated in step 130 (step 135).
That is, (save fuel cost) = (fuel cost based on total energy) − (fuel consumption cost + power consumption cost).

As described above, the saving fuel calculation unit 10 calculates the saving fuel cost, and then displays it on the saving fuel display unit 6.
As described above, the saved fuel calculation unit 10 includes the saved amount calculation means for calculating the saved amount from the difference between the total amount calculated in step 130 and the amount of fuel calculated in step 115, and the calculated saved amount. Display means for displaying the amount of money is provided.

The saved fuel display unit 6 displays the saved fuel cost according to the unit price and the amount of saved fuel. When displaying the saving fuel cost by the amount of fuel, the saving fuel calculation unit 10 divides the saving fuel cost calculated in step 135 by the fuel unit price acquired in step 15 (or steps 25 and 35). Calculate the amount of fuel saved.
Further, the fuel saving calculation unit 10 can guide the fuel saving fuel cost by voice when the hybrid vehicle arrives at the destination (for example, determined by turning off the engine) or during travel if desired by the user.

The following effects can be obtained by the present embodiment described above.
(1) The fuel saving effect by the hybrid mechanism can be presented to the user. For this reason, the user can feel the joy of saving and try to save more energy.
(2) Fuel economy can be improved by using inexpensive commercial power preferentially over fuel.
(3) The amount of fuel required in the case of a vehicle with only an engine can be calculated from the travel energy by the combination of fuel and electric power.
(4) Since the communication system capable of acquiring the fuel unit price and the power unit price in the vicinity of the current location is provided, the saved energy amount can be converted into an actual amount and displayed to the user.

(Modification)
In this modified system, when the hybrid vehicle travels in the saving mode, it displays to the user how much fuel is saved as compared to the case of traveling in the normal mode.
FIG. 6 is a diagram schematically comparing the fuel consumption and the power consumption during traveling in the saving mode and traveling in the normal mode.
In both the saving mode and the normal mode, the power consumption is the same when the hybrid vehicle reaches the destination. This is due to the following reason.

That is, when the travel distance is longer than the distance that can be traveled by only the motor, in normal mode, the battery is fully discharged by motor travel, and then the engine travels. In saving mode, the battery is fully discharged when it reaches the destination. So as to distribute the driving force of the motor and engine.
On the other hand, when the travel distance is less than the distance that can be traveled by the motor alone, the travel is performed by the motor alone in both the normal mode and the saving mode.

Therefore, the difference in fuel consumption between the saving mode and the normal mode is the difference in consumed fuel.
In the example of FIG. 6, the fuel consumption is E [l] more in the normal mode than in the saving mode, and the saving mode is cheaper by the amount obtained by multiplying E [l] by the fuel unit price.

The saving fuel calculation unit 10 acquires and stores driving data every moment in order to calculate how much fuel is required in the normal mode while driving in the saving mode.
Then, the travel data is analyzed when the hybrid vehicle arrives at the destination, and the point where the battery will be fully discharged is determined if the vehicle travels in the normal mode.
This point is a point where the amount of travel energy output by the hybrid vehicle is equal to the amount of travel energy that the motor can output from the battery.
And the saving fuel calculation part 10 calculates the quantity of fuel required when only the engine driving | running | working performs the path | route from the point to the destination.
The amount of fuel actually subtracted from the amount of fuel calculated in this way is the amount corresponding to the above E [l], and thus the fuel savings can be calculated.

In the above example, when driving in the saving mode, the amount of fuel saved if driving in the normal mode was calculated, but conversely, how much if driving in the normal mode and driving in the saving mode You can also calculate how much fuel you saved.
In this case, the saving fuel calculation unit 10 acquires and stores travel data from the departure point to the destination every time during traveling in the normal mode.
And the saving fuel calculation part 10 analyzes driving | running | working data, and schedules the drive distribution of an engine and a motor for performing energy management.
Next, the fuel saving calculation unit 10 calculates the amount of fuel required when the drive is distributed according to the schedule, and it can be saved from the difference between this and the actual fuel consumption when running in the normal mode. Calculate the amount of fuel that will be.

  According to the modification described above, the user can confirm the effect of energy management in the saving mode, and motivates the hybrid vehicle to travel in the saving mode.

It is a figure for demonstrating the outline | summary of this Embodiment. It is a figure for demonstrating ECU mounted in the hybrid vehicle. It is the figure which showed the example of a display of a saving fuel cost. It is a flowchart for demonstrating the procedure of collecting the information which a saving fuel calculation part requires in order to calculate a saving fuel cost. It is a flowchart for demonstrating the calculation procedure of a saving fuel cost. It is a figure for demonstrating a modification.

Explanation of symbols

1 ECU
2 Communication unit 3 Battery sensor 4 Fuel sensor 5 Energy information acquisition unit 6 Saved fuel display unit 7 Energy management system 8 Navigation system 9 Map DB
10 Saving fuel calculator

Claims (7)

In a hybrid vehicle that generates a driving force by an internal combustion engine and an electric motor,
Internal combustion engine running energy acquisition means for acquiring internal combustion engine running energy generated by the internal combustion engine from fuel consumption by the internal combustion engine;
Motor running energy acquisition means for acquiring the motor running energy generated by the motor from the power consumed by the motor;
A summing means for calculating a total amount of the amount of fuel consumed by the internal combustion engine and an amount of power consumed by the electric motor;
Fuel amount calculation means for calculating the amount of fuel required when the total of the acquired internal combustion engine travel energy and motor travel energy is generated in another predetermined standard internal combustion engine;
Saving amount calculation means for calculating the amount of saving from the difference between the calculated total amount and the calculated amount of fuel;
Output means for outputting the calculated saving amount;
A savings amount output device characterized by comprising:
Comprising charging means for charging power by charging from an external power source;
2. The savings amount output device according to claim 1, wherein the electric motor is driven by the charged electric power.   2. The savings amount output device according to claim 1, wherein the other predetermined standard internal combustion engine is an internal combustion engine of a vehicle that travels with a driving force of only the internal combustion engine. Unit price acquisition means to acquire fuel unit price and electricity unit price,
The said summation means and the said fuel amount calculation means calculate the amount of fuel and the amount of electric power using the said fuel unit price and electric power unit price which were acquired, The Claim 2, Claim 2, or Claim 3 characterized by the above-mentioned. The savings amount output device described in 1.   The saving history storing means for storing the history of the calculated saving amount is provided, and the output means displays the stored history. The savings amount output device according to claim. Drive means for driving the internal combustion engine and the electric motor in a predetermined drive schedule in a route from the departure place to the arrival place;
An estimation means for estimating a fuel consumption amount consumed by the internal combustion engine and a power consumption amount consumed by the electric motor when it is assumed that the internal combustion engine and the electric motor are driven without using the driving schedule;
By comparing the estimated fuel consumption and power consumption with the sum of the fuel consumption and power consumption consumed by the drive means driving the electric motor and the internal combustion engine, the drive A second saving amount calculation means for calculating the saving amount by means;
Second output means for outputting the saving amount calculated by the second saving amount calculation means;
The savings amount output device according to any one of claims 1 to 5, further comprising:   A navigation device equipped with the savings amount output device according to any one of claims 1 to 6.

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