JPH09304088A - Navigation device to be mounted on automobile with searcher for expected fueling site - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation device wherein a fueling site can be calculated in planning a long distance drive by utilizing a map database. SOLUTION: When a destination and a route are input by an input device 3, a fueling site calculator 4 calculates a fueling site based on a residual, gas quantity sensed by a residual gas sensor 2 and an average fuel consumption for a type of roads recorded in an average fuel consumption recorder 1, and gas stations in the vicinity of the fueling site are searched by a gas station searcher 5 and displayed on a map display 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted navigation device.

[0002]

2. Description of the Related Art Conventionally, as described in JP-A-5-71974 and JP-A-5-142994, a function for issuing a warning and prompting a driver to refuel when the remaining fuel amount becomes low An on-vehicle navigation device having a vehicle is known.

These conventional techniques generally operate as shown in FIG. That is, the remaining fuel amount is constantly measured (step 61), and when this remaining fuel amount is below a certain value, a gas station that is close to the current position is automatically searched and displayed (step 62). Is.

Further, there is already known a technique in which the distance traveled is divided by the amount of fuel consumed in order to estimate the amount of fuel consumed.

[0005]

However, in the above-mentioned conventional technique, since the warning is issued only when the remaining fuel amount becomes small, it is possible to calculate the refueling point when making a long-distance operation plan. There wasn't.

If the mileage divided by the amount of fuel consumed is used, the average cruising speed varies depending on the type of road on which the vehicle travels, so that the fuel consumption can be accurately estimated when the type of road is different. There was a problem that I could not.

The present invention solves the above problems,
It is an object of the present invention to provide a vehicle-mounted navigation device that can appropriately estimate a refueling planned point during long-distance driving, and that accurately calculates an average fuel consumption amount for each type of road.

[0008]

In order to achieve the above object, the vehicle-mounted navigation device of the present invention, when driving a long distance, inputs a destination and a waypoint, and refuels on an intermediate route. It has a function to calculate and display the planned site.

Therefore, the invention according to claim 1 of the present invention comprises means for inputting the destination and the waypoint, and means for calculating and displaying the planned refueling point based on the average fuel consumption. Therefore, when driving a long distance, it is possible to know an appropriate planned refueling point.

[0010] The invention described in claim 2 of the present invention provides:
It is provided with a means for calculating an average fuel consumption amount with respect to the traveling distance for each type of road and a means for recording it based on the map database of the vehicle-mounted navigation device. According to this, since the average fuel consumption calculated separately for each type of road is used, it is possible to accurately estimate the amount of fuel consumed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below. FIG. 1 shows the configuration of a navigation device according to an embodiment of the present invention.
The average fuel consumption recording device 1 is based on a writable recording medium such as a magnetic recording device, and the traveling distance for each type of road is calculated based on the traveling distance, the road type, and the fuel consumption that have been traveled in the past. Has recorded the average fuel consumption for. The gasoline remaining amount sensor 2 detects the remaining amount of gasoline in the gasoline tank. The input device 3 is a pointing device such as a mouse or a trackball,
It is for the user of the car to input the destination and the waypoint.

The refueling point calculation device 4 is based on the average fuel consumption obtained from the average fuel consumption recording device 1, the gasoline remaining amount obtained from the gasoline remaining amount sensor 2, and the information input from the input device 3. It determines the entire route and calculates the point on the route where the remaining amount of fuel is below a certain value. The gas station search device 5 searches the route for a gas station near the fuel supply point calculated by the fuel supply point calculation device 4. The map display device 6,
By using liquid crystal or CRT, a route map near the fuel supply point calculated by the fuel supply point calculation device 4 and the position of the gas station searched by the gas station search device 5 are displayed. The map database 7 for the navigation device is stored in a recording medium such as a CD-ROM. The current position calculator 8 has a function of identifying the current position.

FIG. 2 shows a mechanism for calculating the average fuel consumption recorded in the average fuel consumption recording device 1 in FIG. During normal driving, the amount of fuel consumed is detected by the gasoline remaining amount sensor 2 provided in the fuel tank of the automobile and recorded in the temporary recording device 15. Further, the types of roads currently running, such as national roads, highways, city roads, and mountain roads, which are obtained from the map database 7 of the navigation device, and the traveling distance obtained from the traveling distance measuring device 13 are recorded in the temporary recording device 15. From these records, the average fuel consumption amount for the past mileage for each type of road is calculated by the average fuel consumption amount calculation device 14 at regular time intervals and recorded in the average fuel consumption amount recording device 1.

FIG. 3 shows a processing procedure when the planned refueling site search function is used. The user of the vehicle is the input device 3 of FIG.
The destination and transit point are input by (step 31). A route is calculated by the refueling point calculation device 4 from the input destination, waypoint, and the current position specified by the current position calculating section 8 to calculate the refueling point (step 32). The gas station search device 5 searches for all gas stations within a certain distance from the refueling point (step 33). A map near the refueling point is displayed on the map display device 6, and the gas station is blinked on the map.
(Step 34).

FIG. 4 shows a processing procedure for calculating a refueling point in the fuel refueling point calculation device 4. The shortest planned route to reach the destination is searched from the current position, passing through the stopover input by the input device 3 in FIG.
(Step 41 in FIG. 4). Information on the types and lengths of roads on the planned travel route is extracted from the map database 7 in FIG. 1, and the data on the types and lengths of the roads and the roads obtained from the average fuel consumption recording device 1 in FIG. Based on the average fuel consumption for each type, the fuel consumption for each fixed distance point on the planned travel route is calculated (step 42). Based on this result and the current gasoline remaining amount obtained from the gasoline remaining amount sensor 2, a point on the planned travel route where the amount of gasoline becomes a certain amount or less is determined (step 43).

FIG. 5 shows a display example on the map display device 6 of FIG. 1, in which a road map 52 near the fuel supply point is displayed on the display device 51, and the searched gas station 53 is found on the road map. Are all displayed blinking. Also, the route 54 to those gas stations is displayed. This display content is retained until it is deleted by the user,
If necessary, it can be displayed on the display device of the navigation device.

As described above, by adopting the configuration as shown in FIG. 1, it is possible to properly estimate the scheduled fuel supply point. Further, by using the configuration as shown in FIG. 2, the average fuel consumption amount can be calculated for each type of road.

[0018]

As described above, according to the present invention,
When driving a long distance, it is possible to know an appropriate planned refueling point.

Further, by using the average fuel consumption amount calculated separately for each type of road, it is possible to obtain an advantageous effect that the fuel consumption amount can be accurately estimated.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle-mounted navigation device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a mechanism for calculating an average fuel consumption amount recorded in the average fuel consumption amount recording device in the embodiment of the present invention.

FIG. 3 is a diagram showing a processing procedure in which a scheduled refueling site search function is used.

FIG. 4 is a diagram showing a processing procedure for calculating a replenishment point in the fuel replenishment point calculation device.

FIG. 5 is a diagram showing a display example on a display device.

FIG. 6 is a diagram showing a processing procedure in a conventional technique.

[Explanation of symbols]

1 ... Average fuel consumption recording device, 2 ... Gasoline remaining amount sensor, 3 ... Input device, 4 ... Refueling point calculation device, 5
… Gas station search device, 6… Map display device,
7 ... Map database, 8 ... Current position calculation unit, 13 ...
Odometer, 14 ... Average fuel consumption calculator
15 ... Temporary recording device.

Claims (2)

[Claims] 1. A vehicle with a refueling planned site search device, comprising means for inputting a destination and a waypoint, and means for calculating and displaying a planned refueling point based on the average fuel consumption. Navigation device. 2. Refueling, comprising means for calculating an average fuel consumption amount for each mileage for each type of road based on a map database of a vehicle-mounted navigation device, and means for recording the average fuel consumption amount. In-vehicle navigation device with planned location search device.