JP4330971B2 - Vehicle running support system with tire pressure monitoring device - Google Patents

Description

  The present invention relates to a vehicle travel support system that supports travel of a vehicle, and in particular, searches for a planned travel route to a destination by a navigation system and monitors tire air pressure to limit travel speed (acceleration limit) for the vehicle. Alternatively, the present invention relates to a vehicle travel support system capable of performing a deceleration limit).

  As a condition for performing safe driving by an automobile, maintaining the tire air pressure in an appropriate state can be mentioned. That is, if the tire air pressure decreases, the maneuverability and the occurrence of punctures increase, and in high-speed traveling such as highways, accidents due to bursts or the like are caused. On the other hand, if the tire air pressure is too high, there is a problem that slipping may occur if the brake is applied suddenly during running such as rainy weather.

  For this reason, conventionally, a driver of an automobile (vehicle) checks the air pressure of a tire provided in the vehicle, and when the air pressure of the tire is lowered, an in-vehicle compressor mounted in the vehicle, Replenishing air pressure. By the way, since it is usually not easy to determine the reduced pressure state (change) of the tire pressure, various proposals have been proposed as conventional examples, such as an alarm notification when the tire pressure is reduced during running or the like. It is disclosed.

  As a conventional technique related to this type of tire pressure determination, for example, Japanese Patent Application Laid-Open No. H10-228561 discloses that the tire pressure has decreased through a speaker based on a detection signal oscillated from a pneumatic checker attached to a tire air valve of an automobile (decompression pressure reduction). ) Is disclosed (warning) to the driver.

  Patent Document 2 discloses a tire pressure reducing alarm device that sets a predetermined air pressure as a threshold value and issues an alarm when the tire air pressure is reduced to the set air pressure.

  Patent Document 3 discloses a tire that warns a driver by detecting the tire air pressure of an automobile by an air pressure change detection sensor and displaying information on the air pressure detected by the air pressure detection sensor on a backlight liquid crystal display. A decompression alarm display device is disclosed.

Japanese Patent Laid-Open No. 7-81339 JP 7-81340 A JP-A-7-172214

  However, the above-described conventional technique has the following problems. That is, in the case of the above-described prior art, the air pressure with respect to the tire of the vehicle is detected, and if the detected air pressure is reduced or lower than the predetermined air pressure, the driver is only warned. That is, in the above-described prior art, the pressure reduction of the tire pressure can be notified by an alarm to call attention, but it is not an alarm for determining the tire air pressure according to the road conditions on which the vehicle travels. There is a problem.

  On the vehicle side, no measures have been taken with respect to the driving support according to the reduced tire pressure. Specifically, even if an alarm is issued, the tire pressure may decrease and the vehicle may travel as it is, which may cause a decrease in maneuverability or an accident during high-speed traveling on an expressway or the like.

  Accordingly, the present invention has been made to solve the above-described problems caused by the prior art, and relates to a vehicle travel support system including a tire air pressure monitoring device that monitors tire air pressure with respect to vehicle tires, and in particular, navigation. The system searches for a planned travel route to the destination, notifies a warning based on the tire air pressure detected by the tire air pressure detection sensor, and limits the vehicle traveling speed (acceleration limitation or deceleration limitation). It is an object of the present invention to provide a vehicle travel support system that can perform such a process.

In order to solve the above-mentioned problems and achieve the object, the invention according to claim 1 monitors the tire air pressure detecting means for detecting the tire air pressure of the vehicle and the tire air pressure detected by the tire air pressure detecting means. a vehicle travel support system comprising a tire pressure monitoring system, a tire pressure determining means for determining the level of tire air pressure detected by the tire air pressure detecting means, a navigation system searches for a scheduled travel route by the vehicle, Based on the planned travel route searched for by the navigation system , first alarm means for notifying the supply (good / bad) of the tire air pressure, the road condition of the planned travel route searched for by the navigation system, and the tire pressure determination Depending on the combination of tire pressure determined by means It determines the recommended travel contents to be characterized by comprising a second alarm means for notifying the traveling contents determined.

According to the invention described in claim 1, to detect the tire air pressure of the vehicle by the tire air pressure detecting means, the height of the tire pressure detected by the tire air pressure detection means determines the tire air pressure determining unit, a navigation system In addition to searching for the planned travel route of the vehicle, based on the planned travel route searched by the navigation system, the alarm means informs the tire air pressure replenishment (good or bad), and also determines the travel planned route searched by the navigation system. Control is performed to determine the recommended travel content according to the combination of the road condition and the determined tire air pressure, and to notify the determined travel content .

  Further, the invention according to claim 2 is the invention according to claim 1, wherein the tire pressure monitoring device is configured such that when the expressway passes through the planned travel route searched by the navigation system, the vehicle is the expressway. It is provided with the function to perform the alert | report that the tire pressure is replenished before reaching | attaining by a warning means.

  According to the second aspect of the present invention, when the highway passes through the planned travel route searched for by the navigation system, the tire pressure monitoring device is configured so that the tires before the vehicle reaches the highway. The alarm means notifies that air pressure is replenished.

  The invention according to claim 3 is the invention according to claim 1, wherein the tire air pressure detection by the tire air pressure detecting means is activated when the navigation system searches for a planned travel route. To do.

  According to the third aspect of the present invention, the detection of the tire air pressure with respect to the tire of the vehicle by the tire air pressure detecting means is activated when searching for the planned travel route by the navigation system.

  According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, when the tire air pressure detecting means determines that the tire air pressure is not appropriate, the travel speed is limited for the vehicle. The vehicle is further provided with a traveling speed control means for performing control.

  According to the fourth aspect of the present invention, when the tire air pressure determining means determines that the tire air pressure is not appropriate, the vehicle is controlled to limit the traveling speed.

  The invention according to claim 5 is the invention according to claim 4, wherein the travel speed limiting means is a case where the tire air pressure determining means determines that the tire air pressure is low, and is searched by the navigation system. When an expressway passes through the planned travel route, it has a function of limiting the acceleration of the travel speed.

  According to the fifth aspect of the invention, the tire air pressure is determined by the tire air pressure determining means, and it is determined that the tire air pressure is low by this determination, and there is a highway on the planned travel route searched by the navigation system. When the search is made, the travel speed limiting means limits the acceleration of the travel speed of the vehicle.

  The invention according to claim 6 is the invention according to claim 4, wherein the travel speed limiting means is a case where the tire air pressure determining means determines that the tire air pressure is low, and is searched by the navigation system. When a curve is routed to the planned travel route, the vehicle has a function of limiting the deceleration of the travel speed.

  According to the sixth aspect of the invention, the tire air pressure is determined by the tire air pressure determining means, and it is determined that the tire air pressure is low by this determination, and the curve is routed to the planned travel route searched for by the navigation system. When the search is made, the vehicle speed limit means limits the deceleration of the vehicle speed.

  The invention according to claim 7 is the invention according to claim 4, wherein the travel speed limiting means is a case where the tire air pressure determining means determines that the tire air pressure is high, and is searched by the navigation system. In the case where it is recognized that the planned travel route is rainy, it has a function of limiting the deceleration of the travel speed.

  According to the seventh aspect of the present invention, the tire air pressure is determined by the tire air pressure determining means, the tire air pressure is determined to be high by this determination, and the planned travel route searched for by the navigation system is in rainy weather. If it is recognized, the vehicle speed limit is limited by the travel speed limiting means.

  Further, in the invention according to claim 8, in the invention according to claim 4, when the tire air pressure determining means determines that the tire air pressure is low, the navigation system supplies the air pressure replenishment facility existing on the planned travel route. And a map display of the location of the air supply equipment.

  According to the eighth aspect of the present invention, when the tire air pressure determining means determines that the tire air pressure is low, the navigation system searches for the air pressure replenishing facility existing on the planned travel route, and this air pressure replenishing facility. Displays the location of the map.

  The invention according to claim 9 is the invention according to any one of claims 4 to 8, wherein the travel speed limiting means performs speed control according to a steering angle by the vehicle. To do.

  According to the invention of claim 9, the traveling speed limiting means performs speed control according to the steering angle of the vehicle.

  The invention according to claim 10 is the invention according to any one of claims 4 to 8, wherein the travel speed limiting means is a curvature of a curve arranged on a planned travel route searched by the navigation system. It is characterized by performing speed control according to the above.

  According to the tenth aspect of the present invention, the travel speed limiting means performs speed control according to the curvature of the curve arranged on the planned travel route searched for by the navigation system.

According to the invention described in claim 1, to detect the tire air pressure of the vehicle by the tire air pressure detecting means, the height of the tire pressure detected by the tire air pressure detection means determines the tire air pressure determining unit, a vehicle by the navigation system In addition to searching for the planned travel route of the vehicle, based on the planned travel route searched for by this navigation system, the alarm means notifies the tire pressure supply (good or bad), and the road of the planned travel route searched by the navigation system According to the combination of the situation and the determined tire pressure, the recommended driving content is determined, and the control for notifying the determined driving content is performed, so that it is possible to provide good driving support according to the driving road situation There is an effect.

  Further, according to the invention of claim 2, the tire pressure monitoring device, when the highway passes through the planned travel route searched by the navigation system, before the vehicle reaches the highway. Since the alarm means notifies that the tire air pressure is replenished, it is possible to avoid a decrease in maneuverability due to a decrease in tire air pressure.

  According to the invention of claim 3, the tire air pressure detecting means for the tire of the vehicle is activated by the tire air pressure detecting means when searching for the planned travel route by the navigation system, so that the tire air pressure can be replenished at an appropriate timing. There is an effect.

  According to the invention of claim 4, when the tire speed determining means determines that the tire air pressure is not appropriate by the traveling speed control means, the vehicle is controlled to limit the traveling speed. There is an effect that good driving support can be performed at an appropriate timing.

  According to the invention of claim 5, the tire air pressure is determined by the tire air pressure determining means, and it is determined that the tire air pressure is low by this determination, and the highway is on the planned travel route searched by the navigation system. When a search is made, the travel speed limiting means limits the acceleration of the travel speed of the vehicle, so that it is possible to provide good travel support at an appropriate timing.

  According to the invention of claim 6, the tire air pressure is determined by the tire air pressure determining means, and it is determined that the tire air pressure is low by this determination, and a curve passes through the planned travel route searched by the navigation system. When the search is made, the vehicle speed is restricted by the travel speed limiting means, so that it is possible to provide good travel support at an appropriate timing.

  According to the invention according to claim 7, the tire air pressure is determined by the tire air pressure determining means, it is determined that the tire air pressure is high by this determination, and the planned travel route searched for by the navigation system is in rainy weather. When it is recognized that the vehicle speed is recognized, the vehicle speed limit is limited by the driving speed limiting means, so that it is possible to provide good driving support at an appropriate timing.

  According to the eighth aspect of the present invention, when the tire air pressure determining means determines that the tire air pressure is low, the navigation system searches for the air pressure replenishing equipment existing on the planned travel route and this air pressure replenishment. Since the location of the facility is displayed as a map, it is possible to easily grasp the travel route to the pneumatic supply facility and to provide travel support.

  According to the ninth aspect of the present invention, the travel speed limiting means performs speed control according to the steering angle of the vehicle, so that the vehicle travels according to the steering operation according to the shape of the travel road. Since the speed can be controlled to an appropriate speed, the operability and safety can be improved.

  According to the invention of claim 10, the travel speed limiting means is searched by the navigation system and performs speed control according to the curvature of the curve arranged on the planned travel route. Since the traveling speed of the vehicle can be controlled to an appropriate speed according to the shape (curvature) of the vehicle, the operability and safety can be improved.

  Exemplary embodiments of a vehicle travel support system according to the present invention will be explained below in detail with reference to the accompanying drawings. FIG. 1 is an overall functional block diagram illustrating a schematic configuration of a vehicle travel support system including a tire air pressure monitoring device according to the first embodiment. In the following, the characteristics of the vehicle travel support system including the tire pressure monitoring apparatus according to the first embodiment will be described, and then the processing procedure by the tire pressure monitoring apparatus will be described. In addition, this invention is not limited by the Example shown below.

  The feature of the first embodiment of the vehicle driving support system of the present invention is that the navigation system 50 searches for a planned driving route to the destination and determines the tire air pressure detected by the tire air pressure detection sensor 12. It is determined that the alarm unit 40 notifies that the tire air pressure is replenished according to the road condition of the planned travel route. Specifically, when performing high-speed driving on an expressway or the like, in a state where the tire air pressure is reduced, the maneuverability is also reduced due to the waving of the tire, etc. When the tire pressure is reduced, the alarm unit 40 notifies the tire pressure to increase before reaching the expressway.

  Further, the first embodiment is characterized in that the traveling speed is limited for the vehicle based on the detected tire air pressure level. The travel speed limit is an acceleration limit that limits acceleration or a deceleration limit that limits sudden deceleration such as sudden braking, and the acceleration speed limit and deceleration limit can be performed by the travel speed control unit 34.

  As shown in FIG. 1, the vehicle travel support system according to the first embodiment includes a tire air pressure detection sensor 12 that detects the air pressure of each tire 11 provided in the vehicle 10 and a tire air pressure monitoring device 20. . The tire air pressure detection sensor 12 is attached to each tire 11 of the vehicle 10, and the air pressure of each tire 11 detected by the tire air pressure detection sensor 12 is input to the main control unit via an input / output I / F (interface) 41. 30.

  The tire pressure monitoring device 20 includes a main control unit 30 and a navigation system 50. The main control unit 30 includes a tire pressure storage unit 31, a tire pressure determination unit 32, a navigation search determination unit 33, and a traveling speed. A control unit 34 and a navigation display control unit 35 are provided. Reference numeral 40 denotes an alarm unit that warns the driver by voice (monitor display) or the like when the tire air pressure decreases. Reference numeral 41 denotes an input / output I / F (interface) that transmits and receives input / output signals between the vehicle 10 and the main control unit 30 and the navigation system 50.

  The tire air pressure storage unit 31 has a function of storing the air pressure of each tire 11 detected by the tire air pressure detection sensor 12. The tire air pressure determination unit 32 has a function of determining whether or not the tire air pressure stored in the tire air pressure storage unit 31 is an appropriate air pressure. As will be described later, in this example, when the tire air pressure is lower than a predetermined air pressure and the planned travel route at this time is an expressway or the like, the alarm unit 40 supplies the air pressure to the driver. This is notified by voice or monitor display.

  The navigation search determination unit 33 has a function of determining whether or not the navigation system 50 has searched for a planned travel route to the destination. When the tire air pressure determination unit 32 determines that the tire air pressure is not appropriate, the travel speed control unit 34 performs travel speed limitation (acceleration limitation due to sudden acceleration or deceleration limitation due to sudden braking). It has a function. In addition to the function of controlling the speed limit according to the radius of curvature of the curve existing in the planned travel route, the travel speed limiter 34 also has a function according to the distance of the expressway and according to the tire pressure level. It has a function to control the speed limit.

  The navigation display control unit 35 has a function of controlling to display specific equipment such as a gas station (pneumatic supply equipment) on the monitor 52 by the navigation system 50.

  The navigation system 50 is connected to a GPS receiver 51 that calculates the current position of the vehicle 10 (own vehicle) by communication with a GPS artificial satellite, a monitor 52, and a speaker 53, and provides a planned route (scheduled travel route) by the own vehicle. Has the ability to manage.

  That is, the navigation system 50 creates a planned travel route by the vehicle 10 based on the current position of the host vehicle calculated by the GPS receiver 51, map data (not shown), and input operation from the user (driver or the like). The travel planned route is displayed on the monitor 52, and a route guidance is provided by voice output from the speaker 53. Specifically, the navigation system 50 can display the current position of the host vehicle calculated by the GPS receiver 51 and the planned travel route to the destination on the monitor 52. The monitor 52 has a function of displaying the current position of the vehicle 10 calculated by the GPS receiver 51 and the planned travel route to the destination.

  Further, the navigation system 50 has a function of acquiring current position information of the host vehicle, searching for a travel distance to the travel destination, a travel route to the travel destination, and a travel road situation. . In particular, in the first embodiment, the alarm system 40 informs that the tire pressure is replenished based on the presence of an expressway, a straight road, a curve, etc. existing on the road (route) by the navigation system 50. It has a function to do.

  Specifically, the warning unit 40 gives a warning to the driver such as “Tire air pressure is decreasing” or “Please decrease the traveling speed”. A map information database 54 stores map information. The map information database 54 also stores information relating to air supply equipment such as a gas station for supplying tire air pressure.

  Next, a processing procedure performed by the tire pressure monitoring device 20 will be described in detail with reference to FIG. FIG. 2 is a flowchart illustrating a processing procedure when the tire pressure monitoring device 20 is activated. That is, as shown in the flowchart of FIG. 2, it is first determined whether or not the search signal is acquired by the navigation system 50 (step S210). The determination in step S210 is processing for determining whether or not the navigation system 50 has searched for a travel route from a user such as a driver to the destination during actual travel.

  If it is determined in step S210 that the navigation system 50 is used (Yes in step S210), then the tire air pressure detected by the tire air pressure detection sensor 12 is acquired (step S220). . The tire pressure is detected and acquired for each tire 11, and the acquired tire pressure level is stored (stored) in the tire pressure storage unit 31 (FIG. 1).

  Next, it is determined whether or not the air pressure (level) acquired in step S220 is appropriate (step S230). Specifically, it is determined whether or not the tire air pressure is low (step S240). If it is determined that the tire air pressure is decreased by the determination in step S240 (Yes in step S240), then, The navigation system 50 acquires the planned travel route of the vehicle 10 (step S250), and determines whether there is an expressway on the planned travel route to the destination (step S260).

  If it is determined in step S260 that there is a highway on the planned travel route to the destination (Yes in step S260), the warning speed is limited by the alarm unit 40 (step S270). Further, the warning unit 40 notifies the tire air pressure to be supplied (step S280). The voice notification by the alarm unit 40 is, for example, “Pass the highway. Decrease the running speed because the tire pressure is low.” “Pass the highway. The tire pressure is low. Please supply air pressure. "

  On the other hand, if it is determined in step S260 that there is no highway on the planned travel route (No in step S260), it is next determined whether there is a curve on the planned travel route (step S265). If it is determined by this determination that there is a curve on the planned travel route (step S265), similarly to the above, acceleration limitation of the traveling speed is performed by the alarm unit 40 (step S270). A notification for urging the tire air pressure to be supplied is issued at 40 (step S280).

  That is, when the air pressure of the tire 10 is reduced, the contact area between the tire 10 and the road surface is increased (the friction coefficient is also large). For this reason, driving on high-speed roads (roads that can be driven at high speeds even if they are not highways) with tires with reduced air pressure will cause tire undulations and handle operation. Since there is a possibility that it will disappear, when the predetermined traveling speed is exceeded, the voice of the alarm unit 40 is notified so as to reduce the speed (acceleration limitation). Similarly, when driving on a curve, if the tire 10 has a low air pressure, the tires may wobble and the steering wheel may not be operated. I am trying to inform you.

  Next, a processing procedure when it is determined that the tire air pressure is high (No in step S240) will be described. That is, if it is determined that the tire air pressure is high (No at Step S240), it is then determined by the navigation system 50 whether or not traveling in rainy weather is predicted (Step S245). Whether or not the vehicle is traveling in rainy weather is predicted based on the area where the vehicle is scheduled to travel, the estimated arrival time, the weather forecast that changes with time, and the like. If it is predicted that the vehicle is traveling in rainy weather (Yes at Step 245), the vehicle speed is limited to be reduced (Step S248).

  Specifically, a notification for prohibiting sudden deceleration such as “sudden braking” is given to the driver. In other words, when the tire pressure is high, the contact area between the tire and the road surface becomes small (coefficient of friction: small). If a sudden braking operation such as the above is performed, there is a risk that a slip or the like may occur, which is dangerous. Therefore, the traveling speed control unit 34 limits the deceleration. The voice notification by the alarm unit 40 in this case is, for example, “Because the tire pressure has decreased, please stop sudden deceleration such as sudden braking”. Thereafter, the process ends (end).

  Further, even if the acceleration limit alarm and the decompression replenishment alarm in steps S270 and 280 are used to increase the traveling speed or the tire air pressure is not replenished, the alarm is alerted again (for example, “tire air pressure”). Acceleration is dangerous because “the tire pressure is low.” Acceleration is limited to 90 kilometers because the tire pressure is low. ”

  In addition, acceleration is not possible even if the accelerator is stepped on if speed is increased (when deceleration is not performed) or tire pressure is not replenished by repeated acceleration limit alarms and decompression replenishment alarms. The brake control may be forcibly activated. In this case, for example, the alarm unit 40 notifies that “acceleration is forcibly limited because the tire air pressure has decreased”.

  As described above, in the vehicle travel support system including the tire pressure monitoring device shown in the first embodiment, the tire pressure of the vehicle is detected by the tire pressure detection means, and the tire pressure detected by the tire pressure detection means is detected. The tire pressure determining means determines whether the air pressure is proper, searches for the planned travel route of the vehicle by the navigation system, and supplies tire pressure based on the planned travel route searched by the navigation system. Since the notification is performed by the warning means, it is possible to avoid a decrease in maneuverability due to a decrease in tire air pressure, and thus it is possible to improve a high speed traveling on a highway or the like.

  Next, a second embodiment according to the vehicle travel support system of the present invention will be described. FIG. 3 is a flowchart illustrating the processing procedure of the second embodiment. Here, since the processing procedure from step S210 to step S280 according to the second embodiment is the same as that of the first embodiment, detailed description thereof is omitted. The feature of the second embodiment is that when a decrease in tire air pressure is detected by the determination of tire air pressure, the position of a gas station or the like (pneumatic replenishment facility) existing on the planned travel route is searched using the search of the navigation system 50. ) To display the map. Specifically, the position of the gas station is displayed on the monitor 52 of the navigation system 50.

  That is, as shown in the flowchart of FIG. 3, in the second embodiment, after notifying the tire pressure supply in step S <b> 280, the equipment that can supply the tire pressure is presented to the driver. Like to do. Specifically, the navigation system 50 searches for a gas station that is in the middle of the planned travel route (step S285), and determines whether the position of the gas station has been acquired by this search (step S286). When the position is acquired (Yes at Step S286), the position of the gas station is displayed on the monitor 52 (on the map) of the navigation system 50 (Step S290).

  Here, the arrival time and the arrival distance from the current location where the vehicle 10 is located may be displayed on the monitor 52 in this case. Moreover, when the position of a gas station is acquired by step S286, you may make it perform audio | voice alerting | reporting by the warning part 40. FIG. The voice notification by the alarm unit 40 is, for example, “please put air into the tire at the gas station”, “there is a gas station at XX km ahead”, and the like. In this example, the navigation system 50 searches for a gas station as a pneumatic supply facility. However, other than the gas station, a service area of an expressway may be searched simultaneously. Further, not only the tire pressure but also the gasoline consumption is detected, the gasoline consumption is notified by the alarm unit 40, and the position of the gas station searched by the navigation system 50 is displayed as a map as a gasoline refueling place. Also good.

  As described above, in the vehicle travel support system according to the second embodiment, when a decrease in tire air pressure is detected by the tire air pressure determination, the vehicle travel support system is present on the planned travel route using the search of the navigation system 50. Since the position (pneumatic replenishment facility) of the gas station to be operated is displayed as a map, even if no on-board compressor is installed in the vehicle 10, the appropriate amount of air pressure can be obtained by the gas station displayed on the map by this navigation search. Can be replenished.

  Next, a third embodiment according to the vehicle travel support system of the present invention will be described. FIG. 4 is a flowchart illustrating the processing procedure of the third embodiment. The above-described first and second embodiments are based on the search by the navigation system 50, but the feature of the third embodiment is that the tire air pressure detected during the running of the vehicle is predetermined without using the navigation system 50. When the vehicle is depressurized to a value and the traveling speed exceeds a predetermined speed, the alarm unit 40 notifies the deceleration limitation of the traveling speed.

  That is, as shown in FIG. 4, first, the tire air pressure is acquired (step S220), and then the tire air pressure level acquired in step S220 is determined (step S221). Specifically, it is determined whether or not the tire air pressure is reduced below a predetermined air pressure (step S223).

  Thereafter, it is determined whether or not the traveling speed by the vehicle 10 is equal to or higher than a predetermined speed (step S224). If the traveling speed is equal to or higher than a predetermined value according to the determination at step S224 (Yes at step S224), driving The person is notified of the deceleration (acceleration limitation) of the traveling speed (step S228). The voice notification by the alarm unit 40 in this case is “the tire air pressure is decreasing, please reduce the speed” or the like. In the case of the third embodiment as well, if the speed is increased (when deceleration is not performed) or the tire pressure is not replenished by repeated acceleration limit alarms and reduced pressure replenishment alarms, the accelerator is not used. Forcible brake control that disables acceleration may be activated even when stepping on.

  As described above, in the vehicle travel support system including the tire air pressure monitoring device described in the third embodiment, the tire air pressure detected during travel of the vehicle is reduced to a predetermined value, and the travel speed is predetermined. When the vehicle speed exceeds the vehicle speed, the alarm unit 40 notifies the vehicle speed reduction limit, so the vehicle travel speed can be controlled to an appropriate speed as the tire air pressure decreases, improving operability and safety. And efficient driving support can be realized.

  As described above, the vehicle travel support system including the tire pressure monitoring device according to the present invention is suitable for a vehicle travel support system for ensuring efficient travel support and safety during vehicle travel.

1 is an overall functional block diagram showing a schematic configuration of a vehicle travel support system according to a first embodiment of the present invention. It is a flowchart explaining the process sequence by the tire pressure monitoring apparatus shown in FIG. 6 is a flowchart illustrating a processing procedure performed by a tire pressure monitoring apparatus according to a second embodiment. 12 is a flowchart illustrating a processing procedure performed by a tire pressure monitoring apparatus according to a third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Tire 12 Tire pressure sensor 20 Tire pressure monitoring device 41 Input / output I / F unit 30 Main control unit 31 Tire pressure storage unit 32 Tire pressure determination unit 33 Navigation search determination unit 34 Travel speed control unit 35 Navigation display control unit 50 Navigation system 51 GPS receiver 52 Monitor 53 Speaker 54 Map information database

Claims (10)

A vehicle travel support system comprising a tire air pressure detecting means for detecting a tire air pressure of a vehicle, and a tire air pressure monitoring device for monitoring a tire air pressure detected by the tire air pressure detecting means,
Tire pressure determination means for determining the level of the tire pressure detected by the tire pressure detection means;
A navigation system for searching for a planned travel route by the vehicle;
First alarm means for informing the tire pressure supply based on the planned travel route searched by the navigation system;
The recommended travel content is determined according to the combination of the road condition of the planned travel route searched by the navigation system and the tire air pressure level determined by the tire air pressure determination means, and the determined travel content is notified. A second alarm means;
A vehicle travel support system comprising:   When the expressway passes through the planned travel route searched by the navigation system, the tire pressure monitoring device notifies the alarm means that tire pressure is replenished before the vehicle reaches the expressway. The vehicle travel support system according to claim 1, comprising a function.   The vehicle travel support system according to claim 1 or 2, wherein the tire air pressure detection means detects the tire air pressure with respect to a tire of the vehicle when searching for a planned travel route by the navigation system. The vehicle further comprises traveling speed control means for controlling the vehicle so as to limit the traveling speed when the tire air pressure determining means determines that the tire air pressure is not appropriate. Or the vehicle travel support system according to 3.   The travel speed limiting means limits acceleration of the travel speed when the tire air pressure determining means determines that the tire air pressure is low and the highway passes through the planned travel route searched by the navigation system. The vehicle travel support system according to claim 4, comprising a function.   The travel speed limiting means limits the acceleration of the travel speed when the tire air pressure determination means determines that the tire air pressure is low, and a curve passes through the planned travel route searched by the navigation system. The vehicle travel support system according to claim 4, comprising a function.   When the tire pressure determining means determines that the tire pressure is high, and the travel speed limiting means recognizes that the planned travel route searched for by the navigation system is raining, the travel speed is reduced. The vehicle travel support system according to claim 4, further comprising a function of performing a restriction.   When the tire air pressure determining means determines that the tire air pressure is low, the navigation system searches for the air pressure replenishment facility existing on the planned travel route and displays the location of the air pressure replenishment facility on a map. The vehicle travel support system according to claim 5 or 6, characterized in that   The vehicle travel support system according to any one of claims 4 to 8, wherein the travel speed limiting means performs speed control according to a steering angle of the vehicle.   The vehicle travel support according to any one of 4 to 8, wherein the travel speed limiting means performs speed control according to a curvature of a curve arranged on a planned travel route searched by the navigation system. system.

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