JP2018200253A - Driving support device - Google Patents

Abstract

To provide a driving support device capable of urging a driver to oil supply in a cold district.SOLUTION: A driving support device 20 includes: a date information acquisition part 21; a position information acquisition part 22; an oil supply information recording part 23 for recording an oil supply date and an oil supply position; a characteristic value database 25 for storing characteristic value information obtained by associating a date with the lowest temperature in the date for each position which can be acquired by the position information acquisition part 22; a notification part 26 for notifying a driver of a message recommending oil supply around the current position; and a determination part 24 for determining the success/failure of an execution condition of the notification by the notification part 26. The determination part 24 acquires a first characteristic value corresponding to the current date and the current position, and a second characteristic value corresponding to an oil supply date and an oil supply position from the characteristic value database 25, and determines that the execution condition is established in the case that the first characteristic value is a value indicating a cold district and that a deviation between the first characteristic value and the second characteristic value is equal to or more than a threshold.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a driving support device that supports driving of a vehicle equipped with a diesel engine.

Light oil, which is a fuel for diesel engines, is classified into five types of No. 1, No. 1, No. 2, No. 3, and No. 3 in descending order of the upper limit of the pour point in the Japanese Industrial Standard (JIS). For example, in JIS No. 1 diesel oil, the upper limit of the pour point is specified at + 5 ° C., and in JIS No. 3 diesel oil, the upper limit of the pour point is specified at −30 ° C. For this reason, light oil for cold district specifications such as JIS No. 3 and JIS No. 3 is sold at gas stations in cold districts.
If a vehicle equipped with JIS No. 1 diesel oil is left in a cold region in winter for a long time, the wax component contained in the diesel oil will precipitate and the fuel filter will become clogged, making it difficult to restart the engine. It may become. Therefore, for example, Patent Document 1 discloses a fuel filter that can suppress precipitation of wax components and the like.

JP 2007-113457 A

  By the way, a large vehicle such as a cargo vehicle has a long moving distance including transportation by a cargo ship or the like, and often moves from a warm region to a cold region within one day. In such a case, it is preferable to refuel in a cold region, but the driver may forget.

  An object of the present invention is to provide a driving support device that can prompt a driver to refuel in a cold region.

  The driving support device that solves the above problems includes a date and time information acquisition unit that acquires the current date and time, a position information acquisition unit that acquires the current position of the vehicle, and the current date and time when the refueling is detected. A refueling information recording unit that records the current position as a refueling date and time and a refueling position; a characteristic value database that stores a date and time and a characteristic value corresponding to the date and time for each position that can be acquired by the position information acquiring unit; A notification unit for notifying the driver of a message recommending refueling around the current position; and a determination unit for determining success or failure of an execution condition of notification by the notification unit, wherein the determination unit includes the current date and time The first characteristic value that is the characteristic value corresponding to the current position, and the second characteristic value that is the characteristic value corresponding to the refueling date and time and the refueling position are stored in the characteristic value data base. The execution condition is satisfied when the first characteristic value is a value indicating a cold region and the difference between the first characteristic value and the second characteristic value is equal to or greater than a threshold value. Is determined.

  According to the above configuration, since the execution condition is satisfied when it is estimated that the vehicle is traveling in a cold region with fuel that is not cold region specification, refueling around the current position to the driver of the vehicle, that is, Refueling in cold areas can be encouraged.

In the driving support apparatus, it is preferable that the determination unit determines whether or not the execution condition is satisfied when the vehicle is started.
According to the above configuration, it is possible to promptly refuel the driver when the vehicle is started.

In the driving support apparatus, it is preferable that the determination unit determines whether or not the execution condition is satisfied at every set interval from the previous determination.
According to the above configuration, the driver can be promptly refueled when the vehicle is started, and the driver can be appropriately refueled after the vehicle is started.

  In the driving support apparatus, the determination unit repeatedly determines whether or not the execution condition is satisfied from the time of starting the vehicle and holds a flag indicating whether or not the execution condition is satisfied, and the notification unit notifies the message. It is preferable to repeatedly determine whether the condition is satisfied, and to notify the message when the notification condition is satisfied and the flag indicates that the execution condition is satisfied.

  As in the above-described configuration, by separately determining whether or not the execution condition is satisfied and notifying the notification condition and notifying the message, it is possible to increase the degree of freedom regarding the message notification timing while monitoring the success or failure of the execution condition.

In the driving support apparatus, it is preferable that the characteristic value database stores a minimum temperature of each month for each position that can be acquired by the position information acquisition unit.
According to the above configuration, the characteristic value database stores the minimum temperature of each month as the date and the characteristic value. According to such a configuration, the determination based on the characteristic value can be performed with high accuracy while reducing the data capacity of the characteristic value database.

The figure which shows schematic structure of the vehicle carrying 1st Embodiment of a driving assistance device. The functional block diagram centering on the driving assistance device in 1st Embodiment. The figure which shows an example of a part of characteristic value information typically. The flowchart which shows an example of a fuel supply information recording process. The flowchart which shows an example of a determination process. The functional block diagram centering on the driving assistance device in 2nd Embodiment. The flowchart which shows an example of a notification process.

(First embodiment)
With reference to FIGS. 1-5, 1st Embodiment of a driving assistance device is described.
As shown in FIG. 1, the vehicle 10 is a vehicle equipped with a diesel engine using light oil as fuel. The vehicle 10 includes a fuel tank 11 that stores fuel supplied to the diesel engine, a level sensor 12 that measures the remaining amount of fuel in the fuel tank 11, and a notification device 14 installed in the cab 13. . The notification device 14 is a device that notifies the driver of a message, for example, a speaker that notifies the message by voice or a display that notifies the message by display. The vehicle 10 also includes a driving support device 20 that supports the driving of the driver. The driving support device 20 performs various processes based on the detection signal of the level sensor 12 and GPS signals from the plurality of GPS satellites 5 and notifies a message for prompting refueling around the current location based on the result of the processing. 14 to notify the driver.

  As shown in FIG. 2, the driving support device 20 is mainly configured by one or more microcomputers in which a processor, a memory, an input interface, an output interface, and the like are connected to each other via a bus. The processor executes various processes based on various information acquired via the input interface, various control programs and various data stored in the memory. The processor outputs control signals based on the results of various processes to various control targets via the output interface.

The driving support device 20 includes a date / time information acquisition unit 21, a position information acquisition unit 22, a fuel supply information recording unit 23, a determination unit 24, a characteristic value database 25, and a notification unit 26.
The date information acquisition unit 21 acquires the current date and time including the current date and time. The date and time information acquisition unit 21 acquires the current date and time based on the GPS signal received through the receiver 31, for example.

  The position information acquisition unit 22 acquires the current position, which is the current vehicle position. The position information acquisition unit 22 acquires the current position indicated by latitude and longitude based on the GPS signal received through the receiver 31, for example.

  The fuel supply information recording unit 23 performs a fuel supply information recording process for recording the fuel supply information when the vehicle 10 is supplied with fuel. The refueling information recording unit 23 detects that refueling to the vehicle 10 has been performed based on the detection signal from the level sensor 12. The refueling information recording unit 23 records the current date and time when refueling is detected as the refueling date and records the current position at that time as the refueling position. The refueling information recording unit 23 holds the refueling information 32 including the refueling date and time and the refueling position in a predetermined area of the memory, and updates the refueling information 32 to a new refueling date and time and a refueling position each time refueling is detected. To do.

  The determination part 24 performs the determination process which determines the success or failure of the execution condition which performs the notification of the message mentioned above at the time of starting of a vehicle. The determination unit 24 executes a determination process when an operation for starting the vehicle 10 is performed, such as an ignition ON operation or an engine start button press.

  Moreover, the determination part 24 performs a determination process for every set interval after starting of a vehicle. The set interval may be, for example, an interval based on the actual traveling time or an interval based on the travel distance. The set interval is preferably set to about 1 to 3 hours, for example, if the interval is based on the travel time. The traveling time can be measured by, for example, a timer built in the determination unit 24. The set interval is preferably set to about 30 km to 100 km, for example, as long as it is an interval based on the travel distance. The travel distance can be measured, for example, based on the value of a odometer or the history of the current position acquired by the position information acquisition unit 22. The set interval may be an interval based on both the travel time condition and the travel distance condition. In this case, for example, the determination unit 24 performs the next determination process when the traveling time from the previous determination process has exceeded a predetermined time and the vehicle has traveled more than a predetermined distance from the previous determination process. Such a setting interval may be set from the viewpoint of fuel consumption, or may be set from the viewpoint that the notification of such a message is appropriately performed without the driver feeling annoyed. The set interval may be set from the viewpoint of travel time or travel distance in which an area defined in characteristic value information 33 described later is changed with a certain probability.

  As shown in FIG. 3, the characteristic value database 25 stores characteristic value information 33 in a predetermined area of the memory. The characteristic value information 33 is referred to when the determination unit 24 determines the success or failure of the execution condition. The characteristic value information 33 is data in which the date and the characteristic value T at the date and time are associated with each position that can be acquired by the position information acquisition unit 22. The characteristic value T is a value for determining whether or not light oil of a cold region specification is provided at a gas station around the position, and is, for example, the lowest temperature of each month.

  The characteristic value information 33 is, for example, data in which the area name, the position information of the area, and the lowest temperature of each month in the area are associated. For example, “Sapporo”, which is one of the area names, is associated with latitude 43.0 ° N and longitude 141.3 ° E as one of location information, and −15 as a characteristic value T for January. As a characteristic value T in February, −14 is associated. In addition, “Sendai”, which is one of the area names, is associated with latitude 38.2 ° N and longitude 140.8 ° E as one of location information, and −9 as a characteristic value T in January. As a characteristic value T in February, −9 is associated.

  The notification unit 26 outputs a notification signal indicating that a message is notified to the driver to the notification device 14 when an execution condition is satisfied in the determination process. The notification device 14 to which the notification signal is input outputs, for example, a message such as “please supply fuel for cold regions near the current location. The engine may be difficult to start”. Note that the driving support apparatus 20 is configured to be able to select notification / non-notification of the message by the operation unit 15 operated by the driver. The operation unit 15 is also used, for example, when the message is deleted when the message is displayed on the display.

  With reference to FIG. 4, the fuel supply information recording process which the fuel supply information recording part 23 performs is demonstrated in detail. For example, when the fuel supply information recording unit 23 acquires the remaining fuel amount W1 when the vehicle 10 is stopped and the remaining fuel amount W2 when the vehicle 10 is started, the fuel supply information recording process is performed based on the remaining amounts W1 and W2. Execute.

  As shown in FIG. 4, in the refueling information recording process, the refueling information recording unit 23 determines whether or not a refueling condition is satisfied (step S101). The fuel supply condition is a condition in which it can be determined that the fuel property of the fuel tank 11 is sufficiently close to the property of the fuel supplied. For example, the refueling condition is that the ratio (= ΔW / W2) of the refueling amount ΔW (= W2−W1) to the remaining amount W2 after refueling is 50% or more, preferably 75% or more.

  When the refueling condition is satisfied (step S101: YES), the refueling information recording unit 23 uses the current date and time acquired by the date and time information acquiring unit 21 as the refueling date and the current position acquired by the position information acquiring unit 22 as the refueling position. 32 is updated (step S102), and the refueling information recording process is terminated. On the other hand, if the refueling condition is not satisfied (step S101: NO), the refueling information recording unit 23 ends the refueling information recording process without updating the refueling information 32. That is, in the refueling information recording process, it is determined whether or not the vehicle 10 is refueled, and when refueling is performed, the refueling information is updated.

With reference to FIG. 5, the determination process executed by the determination unit 24 will be described in detail. The determination unit 24 executes a determination process at every set interval from the start of the vehicle.
As illustrated in FIG. 5, in the determination process, the determination unit 24 acquires the current position from the position information acquisition unit 22 (step S201). The determination unit 24 acquires a first characteristic value T1, which is a characteristic value corresponding to the current position acquired in step S201, from the characteristic value database 25 (step S202). The determination unit 24 reads the refueling information 32 held by the refueling information recording unit 23 (step S203), and characterizes the second characteristic value T2 that is a characteristic value corresponding to the refueling date and time and the refueling position indicated by the refueling information 32. Obtained from the value information 33 (step S204).

  Next, the determination unit 24 determines whether or not the first characteristic value T1 is a value indicating a cold region based on, for example, whether or not the first characteristic value T1 is equal to or less than the first threshold value Ta (step S205). . When the first characteristic value T1 is equal to or less than the first threshold value Ta (step S205: YES), the determination unit 24 subsequently determines the difference ΔT (= | T1-T2 |) between the first characteristic value T1 and the second characteristic value T2. ) Is greater than or equal to the second threshold Tb (step S206).

  The second threshold value Tb is a value by which it can be determined that the previously refueled fuel is not suitable for the temperature environment around the current location. For example, the second threshold value Tb is a value that can be determined with a high probability that the cold region specification fuel has not been refueled at the time of the previous refueling. The determination unit 24 holds threshold information 24a in which the second threshold Tb is defined in a predetermined area of the memory. When the minimum temperature of each month is associated with the characteristic value information 33 as the characteristic value as shown in FIG. 3, for example, the threshold information 24 a is, for example, the second threshold Tb for each second characteristic value T2 as shown in Table 1. Is the associated data. The second threshold value Tb in Table 1 is set in consideration of the distribution of gas stations that provide fuel in cold district specifications, the pour point between JIS 2, JIS 3, and JIS Special 3. In step S206, the determination unit 24 reads the second threshold Tb corresponding to the second characteristic value T2 acquired in step S204 from the threshold information 24a, and compares the read second threshold Tb with the deviation ΔT. .

  When the deviation ΔT is greater than or equal to the second threshold value Tb (step S206: YES), the determination unit 24 selects establishment of the execution condition as a result of the determination process (step S207), and ends the determination process.

  On the other hand, when the first characteristic value T1 is larger than the first threshold value Ta (step S205: NO) and when the deviation ΔT is smaller than the second threshold value Tb (step S206: NO), the determination unit 24 performs the determination process. As a result, the execution condition is not satisfied (step S208), and the determination process is terminated. That is, in the determination process, the execution condition is established when the current position of the vehicle 10 is in a cold region and the fuel for the cold region is not refueled at the previous refueling.

The operation of the driving support device 20 of the first embodiment will be described.
For example, it is assumed that the previous refueling was performed in a warm region in January, and then the vehicle 10 was transferred to a cold region using a cargo ship. In this case, when the vehicle 10 is activated in a cold region, the driving support device 20 executes a determination process. In the determination process, the driving support device 20 selects the satisfaction of the execution condition because the first characteristic value T1 is not more than the first threshold value Ta and the deviation ΔT is not less than the second threshold value Tb. When the execution condition is satisfied, the driving support device 20 outputs a notification signal to the notification device 14. That is, the driving support device 20 causes the notification device 14 to output a message prompting refueling around the current location as the vehicle 10 is started. Then, the driving support device 20 thereafter repeatedly executes the determination process at set intervals.

  Further, for example, it is assumed that the previous refueling was performed in a warm region in January and the vehicle 10 self-propelled to a cold region. In this case, the driving support device 20 performs a determination process at every set interval from the start of the vehicle 10. Then, the driving support device 20 selects establishment of the execution condition in the determination process after the vehicle 10 enters the cold region. That is, when the vehicle 10 enters a cold region, the driving support device 20 causes the notification device 14 to output a message that prompts refueling around the current location.

According to the driving support device 20 of the first embodiment, the effects listed below can be obtained.
(1) When the execution condition is satisfied in the determination process, it is estimated that the current position of the vehicle 10 is a cold region and that the fuel in the fuel tank 11 is not a cold region specification fuel. Therefore, it is possible to prompt the driver of the vehicle 10 that is traveling in the cold region with fuel that is not in the cold region specification to supply fuel in the cold region specification. In addition, the driver can be notified according to the current location of the vehicle 10 without being influenced by the destination.

  (2) The driving support device 20 performs a determination process when the vehicle 10 is activated. Therefore, it is possible to prompt the driver to refuel after the vehicle 10 is started. As a result, the driver can make a route plan in consideration of refueling before departure. Further, for example, even when the vehicle 10 stopped in the warm region is started in the cold region, such as when the vehicle 10 is transferred from the warm region to the cold region by a cargo ship or the like, immediately after the vehicle 10 is started. A message can be notified.

  (3) The driving support device 20 executes a determination process at each set interval. Thereby, a message can be appropriately notified to the driver. In addition, for example, when passing through a cold region located between a warm region (departure point) and a warm region (destination), even if the execution condition is satisfied while traveling in the cold region, The execution condition is not satisfied on the ground. Therefore, it is possible to avoid notification to the driver when traveling in a place that is not a cold region.

  (4) The characteristic value information 33 is associated with the minimum temperature of each month for each area as the characteristic value T. Therefore, the success or failure of the execution condition based on the characteristic value T can be determined with high accuracy while reducing the data capacity of the characteristic value information 33. Further, the divergence ΔT can be increased as the probability that the cold region specification fuel is not refueled in the previous refueling increases.

  (5) The determination unit 24 selects the second threshold value Tb from the threshold information 24a according to the second characteristic value T2. According to such a configuration, it can be determined with high accuracy that the fuel supplied last time is not suitable for the temperature environment around the current location.

The said 1st Embodiment can also be suitably changed and implemented as follows.
The determination unit 24 may be configured to change the setting interval. For example, the determination unit 24 may shorten the setting interval as the deviation ΔT of the characteristic value T increases. According to such a configuration, as the probability that the fuel in the fuel tank 11 is not a cold region specification fuel increases, the frequency of prompting the driver to refuel around the current location can be increased. Such an effect becomes remarkable when the characteristic value T is indicated at the minimum temperature. Further, the setting interval may be input by the driver through the operation unit 15.

  The determination unit 24 monitors the position information acquired by the position information acquisition unit 22, and the characteristic value T corresponding to the current position acquired by the position information acquisition unit 22 is greater than the first threshold value Ta to determine the first threshold value Ta. You may perform a determination process, when it changes to the following values. According to such a configuration, the determination process can be performed immediately after the vehicle 10 enters the cold region. As a result, it is possible to promptly refuel the driver with the cold region specification fuel.

(Second Embodiment)
A second embodiment of the driving assistance device will be described with reference to FIGS. 6 and 7. The driving support device of the second embodiment has the same main configuration as the driving support device 20 of the first embodiment. Therefore, in 2nd Embodiment, a different part from 1st Embodiment is demonstrated in detail, and the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol about the part similar to 1st Embodiment.

  In 2nd Embodiment, the determination part 24 determines the success or failure of execution conditions at any time by repeatedly performing the determination process. Further, the notification unit 26 determines whether or not to notify a message as needed by repeatedly executing the notification process.

  As shown in FIG. 6, the determination unit 24 holds an execution flag F indicating whether or not the execution condition is satisfied in a predetermined area of the memory. In the determination process, the determination unit 24 sets the execution flag F to 1 in the process of step S207 when the execution condition is satisfied. In addition, when the execution condition is not satisfied, the determination unit 24 resets the execution flag F to 0 in the process of (Step S208).

The notification process executed by the notification unit 26 will be described in detail with reference to FIG. The notification process is performed after the determination process is completed when the vehicle 10 is activated.
As shown in FIG. 7, in the notification process, the notification unit 26 determines whether a notification condition is satisfied (step S301). One of the notification conditions is, for example, that the vehicle 10 is immediately after startup. This notification condition is satisfied when an operation for starting the vehicle 10 is performed, for example, an ignition operation or an engine start button is pressed. Also, one of the notification conditions is, for example, a condition related to position information, and the characteristic value T corresponding to the current position acquired by the position information acquisition unit 22 is greater than the first threshold Ta to a value equal to or lower than the first threshold Ta. It has changed to a value. That is, one of the conditions is that the vehicle 10 has entered a cold region. Further, one of the notification conditions is, for example, a condition relating to travel time, and is that the travel time from the previous establishment of the notification condition exceeds a predetermined time, for example, 1 to 3 hours. The traveling time can be measured by a timer built in the notification unit 26, for example. Moreover, one of the notification conditions is, for example, a condition related to a travel distance, and is that the travel distance from the previous establishment of the notification condition exceeds a predetermined distance, for example, 30 km to 100 km. The travel distance can be acquired based on, for example, a value of an odometer, and can be calculated based on the current position history acquired by the position information acquisition unit 22.

  The notification unit 26 determines that the notification condition is satisfied when one or more predetermined conditions among the plurality of conditions described above are selectively satisfied. For example, the notification unit 26 determines that the notification condition is satisfied when the condition regarding the position information is satisfied regardless of the previous notification time. Further, for example, the notification unit 26 determines that the notification condition is satisfied when both the condition regarding the travel time and the condition regarding the travel distance are satisfied.

  If the notification condition is satisfied (step S301: YES), the notification unit 26 determines whether 1 is set in the execution flag F (step S302). When the execution flag F is set to 1 (step S302: YES), the notification unit 26 outputs a notification signal to the notification device 14 (step S303), and temporarily ends the notification process. On the other hand, when the notification condition is not satisfied (step S301: NO), and when the execution flag F is reset to 0 (step S302: NO), the notification unit 26 transmits a notification signal to the notification device 14. The notification process is temporarily terminated without outputting.

The operation of the driving support device 20 of the second embodiment will be described.
The driving support device 20 notifies the driver of a message when the execution flag F is set to 1 in the determination process immediately after the vehicle 10 is started, and thereafter notifies the driver of the message every time the notification condition is satisfied. Further, the driving support device 20 notifies the driver of a message when the execution flag F is set to 1 in the determination process immediately after the vehicle 10 enters the cold region, and thereafter notifies the driver whenever the notification condition is satisfied. To be notified.

According to the driving support device 20 of the second embodiment, the following effects can be obtained in addition to the effects according to (1), (2), (4), and (5) described in the first embodiment.
(6) By performing the determination process for determining the success or failure of the execution condition and the notification process for determining the success or failure of the notification condition, the degree of freedom regarding the notification timing of the message can be increased while monitoring the success or failure of the execution condition.

The said 2nd Embodiment can also be suitably changed and implemented as follows.
It is preferable that the notification condition is established periodically after a certain period of time. Therefore, as one of the notification conditions, for example, it may be set to reach a position that is a predetermined distance away from a gas station that has an entrance on the planned traveling road of the vehicle 10. According to such a configuration, the time interval between the notification of the message and the arrival at the vicinity of the gas station is shortened, so that it is further suppressed that the driver who has received the notification of the message forgets to refuel in the cold region. The planned traveling road can be estimated based on the current position acquisition history and map information including road information, gas station location information, and the like.

The first and second embodiments can be implemented with appropriate modifications as follows.
The characteristic value T may be a value that can determine whether or not it is a cold region, in other words, whether or not it is an area where light oil of a cold region specification is sold. Therefore, the characteristic value T is not limited to the minimum temperature, and may be a value according to the type of light oil sold at the gas station according to the time of the day, for example.

  In the determination process, the determination unit 24 does not satisfy the execution condition when the remaining amount W of the fuel tank 11 is small, for example, when the remaining amount W of the fuel tank 11 reaches the remaining amount W that satisfies the lighting condition of the fueling lamp. May be selected. That is, when the possibility of refueling around the current location is very high, the execution condition may not be satisfied. According to such a configuration, for example, when a cargo ship transfers from a warm region to a cold region, a message is notified to a driver who has reduced the fuel in the fuel tank 11 for on-site refueling. Can be avoided. That is, it is possible to avoid excessive message notification.

  The date and time information acquisition unit 21 is not limited to acquiring the current date and time based on the GPS signal, and may acquire the current date and time through the network by being connected to a network such as the Internet, for example.

  The position information acquisition unit 22 is not limited to acquiring the current position based on the GPS signal, for example, acquiring the current position based on signals from a plurality of base stations for connecting to a network such as the Internet. Also good.

The determination unit 24 may hold a predetermined value as the threshold information 24a as the second threshold Tb. In this case, the second threshold value Tb is preferably set to a value of 5 to 10.
The notification device 14 may notify the driver of a message using a plurality of means. That is, the notification device 14 may display a message similar to the voice message on the display together with the voice message. Further, the notification device 14 may be a lamp that is provided at a position where the driver can visually recognize and prompts refueling around the current location.

  DESCRIPTION OF SYMBOLS 5 ... GPS satellite, 10 ... Vehicle, 11 ... Fuel tank, 12 ... Level sensor, 13 ... Cab, 14 ... Notification device, 15 ... Operation part, 20 ... Driving support device, 21 ... Date information acquisition part, 22 ... Position information Acquisition unit, 23 ... refueling information recording unit, 24 ... determination unit, 24a ... threshold value information, 25 ... characteristic value database, 26 ... notification unit, 31 ... receiver, 32 ... refueling information, 33 ... characteristic value information.

Claims (5)

A date and time information acquisition unit for acquiring the current date and time;
A position information acquisition unit for acquiring the current position of the vehicle;
When detecting refueling to the vehicle, a refueling information recording unit that records the current date and time and the current position at the time of detection as a refueling date and refueling position;
A characteristic value database that stores a date and time and a characteristic value corresponding to the date and time for each position that can be acquired by the position information acquisition unit;
A notification unit for notifying the driver of a message recommending refueling around the current position;
A determination unit that determines success or failure of the execution condition of the notification by the notification unit,
The determination unit includes a first characteristic value that is the characteristic value corresponding to the current date and time and the current position, and a second characteristic value that is the characteristic value corresponding to the fueling date and time and the fueling position. The execution condition is satisfied when the first characteristic value is obtained from a database and the first characteristic value is a value indicating a cold region, and the difference between the first characteristic value and the second characteristic value is equal to or greater than a threshold value. A driving support device that judges that The driving support apparatus according to claim 1, wherein the determination unit determines whether the execution condition is successful when the vehicle is started. The driving support device according to claim 2, wherein the determination unit determines whether or not the execution condition is satisfied at every set interval from the previous determination. The determination unit repeatedly determines success / failure of the execution condition from the start of the vehicle and holds a flag indicating success / failure of the execution condition,
The notification unit repeatedly determines whether or not a notification condition for notifying the message is satisfied, and notifies the message when the notification condition is satisfied and the flag indicates that the execution condition is satisfied. The driving support device according to 1. The driving support device according to any one of claims 1 to 4, wherein the characteristic value database stores a minimum temperature of each month for each position that can be acquired by the position information acquisition unit.

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