JP2002245587A - Communication system, on-vehicle device and recording medium - Google Patents

Communication system, on-vehicle device and recording medium

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Publication number
JP2002245587A
JP2002245587A JP2001036836A JP2001036836A JP2002245587A JP 2002245587 A JP2002245587 A JP 2002245587A JP 2001036836 A JP2001036836 A JP 2001036836A JP 2001036836 A JP2001036836 A JP 2001036836A JP 2002245587 A JP2002245587 A JP 2002245587A
Authority
JP
Japan
Prior art keywords
vehicle
communication system
signal
engine
step
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2001036836A
Other languages
Japanese (ja)
Inventor
Sakumi Toda
策巳 戸田
Original Assignee
Denso Corp
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp, 株式会社デンソー filed Critical Denso Corp
Priority to JP2001036836A priority Critical patent/JP2002245587A/en
Publication of JP2002245587A publication Critical patent/JP2002245587A/en
Application status is Pending legal-status Critical

Links

Abstract

(57) [Problem] To provide a communication system, a vehicle-mounted device, and a recording medium which are excellent in practicality by transmitting necessary signal information from a roadside transmission device. In a step 100, a vehicle is connected to a roadside device 3.
Is determined to be within the communication area. In step 110, time schedule information is obtained. Step 1
At 20, the effectiveness of the idling stop is determined.
In step 130, it is determined whether or not the condition for automatically stopping the engine has been satisfied. In step 140, the engine is automatically stopped. In step 150, time schedule information is obtained. In step 160, it is determined whether it is time to start the automatic start of the engine. In step 170, it is determined whether or not the condition for automatically starting the engine has been satisfied. In step 180,
Executes automatic stop of the engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system, a vehicle-mounted device, and a recording medium capable of performing so-called road-to-vehicle communication between a device on a road and a vehicle.

[0002]

2. Description of the Related Art In recent years, for example, ET on highways
As a C (Electronic Toll Collection System), road-to-vehicle communication for communicating between a vehicle and a road side has been studied.

The road-to-vehicle communication is, for example, a DSRC (Dedi
cated Short-Range Communication) can be performed by short-range wireless communication called wireless. As an application of this kind of road-to-vehicle communication, for example, communication between a vehicle and a roadside device (roadside device) It is conceivable to provide various information from the roadside device to the vehicle.

As another technology different from the communication technology described above, a technology relating to idling stop (idle stop) has been conventionally developed. With this technology, when the vehicle stops at an intersection or the like, the idle state of the internal combustion engine is maintained, so the system automatically switches to the idling stop state for the purpose of saving fuel and reducing exhaust emissions when the vehicle stops. Switch.

[0005] Specifically, when a vehicle stops at an intersection or the like, for example, when driving in an urban area, the internal combustion engine is automatically stopped under predetermined stop conditions, and then restarted under predetermined start conditions. Starting it saves fuel,
Automatic start and stop devices have been developed to improve exhaust emissions.

[0006]

However, according to the above-mentioned technique, when the vehicle is stopped at a red light and a predetermined stop condition is satisfied, the internal combustion engine is automatically stopped. If the light is switched to a green light immediately after the restart, the restart is performed in a short time, and there is a problem that the fuel consumption and the exhaust emission deteriorate rather.

That is, since the time at which the signal is switched is not known on the vehicle side, there is a problem that it is difficult to appropriately determine the timing for stopping the internal combustion engine so that the fuel efficiency and the exhaust emission can be actually improved. . The present invention has been made to solve the above problems,
An object of the present invention is to provide a communication system, an in-vehicle device, and a recording medium which are excellent in practicality by transmitting necessary signal information from a roadside transmission device.

[0008]

Means for Solving the Problems and Effects of the Invention (1) According to the first aspect of the present invention, a roadside transmitting device (for example, a roadside device provided on a side of a roadway) wirelessly transmits a signal to a surrounding area. The present invention relates to a communication system for transmitting necessary information, and here, as information, transmits signal information relating to a display time of a signal indicated by a traffic signal (for example, a green signal indicating permission of the vehicle to travel).

Therefore, for example, a vehicle (automobile or the like) receiving the signal information can perform appropriate vehicle control or the like based on the signal information. For example, as described later, if the signal information is information of a waiting time indicating how long the light changes to a green light or an arrow (indicating the traveling direction), the engine is automatically stopped if the waiting time is sufficient. (Idling stop) to improve fuel efficiency and exhaust emissions.

[0010] In addition, if a device for receiving the above-mentioned signal information is provided, various applications using the signal information are possible, not limited to vehicles such as automobiles. For example, if your bicycle is equipped with such a device, you will know when the signal changes, so if, for example, you see that the signal does not change to blue, move to another intersection It can be used in various ways.

The signals indicated by the traffic lights include, for example, a green signal indicating permission of traveling of a vehicle or the like, a red signal indicating inhibition of traveling, a yellow signal indicating caution, and an arrow signal indicating a direction in which traveling is permitted. Can be (2) According to the second aspect of the present invention, the transmitting device is disposed at the traffic light or near the traffic light.

Therefore, a vehicle stopped near a traffic light
Signal information can be transmitted reliably with minimum output. In addition, as a traffic light, for example, a traffic light arranged at an intersection may be mentioned, but in addition, a traffic light arranged at a crosswalk or a railroad crossing, etc. may be mentioned.

(3) According to the third aspect of the present invention, the transmitting device comprises:
For example, a transmission antenna and its transmission area are set so as to transmit signal information to vehicles on a road (particularly a traveling lane). Therefore, the vehicle that has received the signal information can perform appropriate vehicle control and the like.

(4) In the invention according to claim 4, the transmitting device comprises:
Signal information is transmitted to a vehicle stopped at a predetermined stop position on the road. Therefore, the vehicle stopped at the stop position can execute the idling stop control or the like based on the signal information.

(5) According to the invention of claim 5, the transmission is performed by DS
It is performed by RC radio. This DSRC radio is, for example, a so-called narrow-area radio communication having a directivity in a communication area range of 3 to 30 m. By this DSRC radio, for example, road-vehicle communication between an in-vehicle device and a roadside device near a road is performed. It can be carried out.

Note that the DSRC referred to here is the short-range wireless communication itself, and does not depend on the communication system (protocol), frequency, or the like. So, for example, ARI
It is not limited to the B standard or the like. Therefore, the D
The SRC radio has a directivity in a communication area of 30 m or less, for example, and can be defined as a radio communication system using a high frequency or light in a 900 MHz band or more.

(6) According to the invention of claim 6, the signal information is:
This is information indicating the time until the display of the current signal changes. The time required for the display of the current signal to change includes, for example, the time required for the red signal to change to the green light and the time required for displaying the signal of the arrow indicating the traveling direction.

Further, for example, when the time from the green signal to the yellow signal or the time from the yellow signal to the red signal is transmitted, vehicle control and the like can be performed according to the signal information.
For example, when the traffic light changes to a yellow light or a red light in a short time, control can be performed to reduce the speed of the running vehicle or to notify the driver of the decrease.

(7) In the invention of claim 7, the signal information exemplifies information indicating a time until the traveling of the vehicle is permitted. The time (standby time) until the traveling of the vehicle is permitted includes, for example, the time until the red light turns to the green light and the time until the signal of the arrow indicating the traveling direction is displayed.

Therefore, as will be described later, automatic stop control and automatic start control of the engine can be performed based on the standby time. (8) The invention according to claim 8 relates to an in-vehicle device used in the communication system described above. Here, an engine (particularly, an internal combustion engine) of a vehicle is based on signal information transmitted from a roadside transmitting device. At least one of an automatic stop control for automatically stopping the vehicle and an automatic start control for automatically starting the vehicle.

According to the present invention, for example, in the automatic stop control, the engine is automatically stopped when a predetermined automatic stop condition is satisfied, and in the automatic start control, the predetermined automatic stop control is performed based on the transmitted signal information. When the starting conditions are satisfied, the engine is automatically started. In other words, if it is found that the timing is suitable for the automatic stop (the fuel consumption and the exhaust emission can be improved by stopping the engine), for example, when the standby time is sufficient based on the signal information, Execute stop control. This improves fuel economy and exhaust emissions.

Also, when it is found from the signal information that the timing is suitable for the automatic start (when the engine is started, a quick start is possible thereafter), for example, when the standby time is short. , The automatic start control is performed. As a result, when the signal changes, quick start is possible.

(9) According to the ninth aspect of the invention, when the vehicle stops, if the time until the advance of the vehicle is permitted is less than or equal to the first determination time, the execution of the automatic stop control is prohibited.
For example, if the waiting time until the light changes to a green light is short (such as the first determination time or less) (the engine is operating) and the engine is automatically stopped, it is necessary to restart the engine immediately afterwards. It may not contribute to the reduction of exhaust emissions.

Therefore, in the present invention, when the standby time is short, the automatic stop control is prohibited, so that it is possible to prevent deterioration of fuel efficiency and exhaust emission. (10) According to the tenth aspect, when the vehicle stops (especially when automatic stop control is performed), the time until the vehicle is allowed to advance (shorter than the first determination time) is the second determination time. In the following cases, the execution of the automatic start control is permitted.

According to the present invention, when the standby time is shortened while the engine is stopped, the engine is automatically started by performing the automatic start control. The vehicle can be started. (11) The invention according to claim 11 relates to an in-vehicle device used in the above-described communication system. ) A notification means for notifying the driver is provided.

Therefore, for example, when the driver is notified of the standby time until the light changes to a green light, the driver can recognize the standby time. Therefore, when the waiting time is long, the fuel consumption and the exhaust emission can be reduced by manually turning off the engine by the driver. Also,
If the waiting time is short when the vehicle is stopped with the engine turned off, the driver can start the engine manually, thereby enabling quick start.

(12) A twelfth aspect of the present invention is a recording medium storing means (for example, a program) for realizing the functions of the above-mentioned vehicle-mounted device. That is, the function of realizing the above-described in-vehicle device in the computer system can be provided as, for example, a program activated on the computer system side. In the case of such a program, for example, it is recorded on a computer-readable recording medium such as a floppy (registered trademark) disk, a magneto-optical disk, a CD-ROM, or a hard disk, and is loaded into a computer system as needed and activated. Can be used. Alternatively, the program may be recorded in a ROM or a backup RAM as a computer-readable recording medium, and the ROM or the backup RAM may be incorporated in a computer system and used.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment (embodiment) of a communication system, a vehicle-mounted apparatus and a recording medium according to the present invention will be described with reference to the drawings. First Embodiment a) First, a basic configuration of a communication system according to the present embodiment will be described.

As shown in FIG. 1, the communication system according to the present embodiment is arranged on a roadside with a device (vehicle-mounted device) 1 mounted on a vehicle (vehicle) by short-range wireless communication called DSRC radio. A so-called road-to-vehicle communication is performed with the roadside device 3. In particular, in the present embodiment, the roadside communication device 5 of the roadside device 3 is attached near the display unit 9 of the traffic light 7 (lights such as red, yellow, and blue lights). Time schedule information (time information indicating a standby time), which will be described later, is distributed to the vehicle-side communication device 11 of the vehicle-mounted device 1 by broadcast, that is, one-way communication at predetermined time intervals.

The range of the communication area of the roadside communication device 5 is about 3 to 30 m. As shown in FIG. 2, the communication area (shaded area in FIG. 2) faces the traffic light 7 at the stop position of the intersection. Then, when the vehicle stops, it is set to be able to communicate with the first vehicle and several subsequent vehicles.

The DSRC radio is characterized in that the communication speed is as high as 1.024 Mbps, so that communication processing can be completed in a short time not only for a stopped vehicle but also for a moving vehicle before the stop. can do. In addition, since communication in a specific range can be performed using the narrow communication area, communication with, for example, a vehicle located on an opposite lane or an intersecting road can be prevented. Further, since the frequency of the radio wave is very high at 5.8 GHz, interference of the radio wave is small and highly reliable wireless communication can be realized.

Devices used for DSRC radio include VICS (Vehicle Information And Communication).
A DSRC device used for existing communication such as System (registered trademark) or ETC can be adopted. In particular, in the present embodiment, since one-way communication is sufficient, a VICS radio wave or an optical beacon can be used.

B) Next, the electrical configuration of the communication system of this embodiment will be described. In the communication system of the present embodiment, as shown in FIG. 3, as the roadside device 3, a roadside control device (roadside ECU) 13 mainly composed of a computer, and a roadside communication device 5 having a roadside antenna 15 and a roadside communication circuit 17. With
The vehicle-mounted device 1 includes a vehicle-side control device (vehicle-side ECU) 19 mainly composed of a computer, and a vehicle-side communication device 11 having a vehicle-side antenna 21 and a vehicle-side communication circuit 23.

The roadside control device 13 is connected to a traffic light control device 25 for controlling the traffic light 7, and receives traffic light information (signal information) including a signal switching time from the traffic light control device 25. On the other hand, the vehicle-side control device 1
Reference numeral 9 denotes, as sensors, a side brake switch 27 for detecting whether a side brake is applied, and an AT shift position for detecting a shift position of an automatic transmission (AT) at its input / output port (not shown). Sensor 29 and vehicle speed sensor 3 for detecting vehicle speed
1 and a turn signal sensor 33 for detecting the turn direction of the turn signal are connected.

The vehicle-side control device 19 includes, as actuators, control devices (for example, a fuel injection valve and a starter) necessary for automatic start and stop of the engine, and a time required for a signal to be switched by being provided on a multi-display. (Standby time) and a speaker 39 for displaying the standby time by voice.

C) Next, control processing in the communication system of the present embodiment will be described. Processing on Roadside Apparatus 3 The roadside apparatus 3 obtains time schedule information for switching signals from the signal control device 25 and performs a process of transmitting this information by broadcast at a predetermined cycle (for example, every 10 ms).

Here, the time schedule information to be transmitted will be described. For example, as shown in FIG. 4A, red, yellow, and blue signal lights 9a to 9c are displayed on the display unit 9 of the traffic light 7.
And a case in which indicator lamps 9d to 9f for straight ahead, leftward, and rightward directions are provided.

In this case, as the time schedule information, for example, as shown in FIG. 4B, the type of the light displayed by the traffic light 7 and the time until the light is displayed are listed. Specifically, the time schedule information includes
The time until the blue traffic light 9c is turned on, that is, the waiting time (for example, 20 seconds) until the current red light is switched to the green light, and the waiting time (for example, 20 seconds) until the straight-ahead indicator light 9e is displayed. Second) and the left-turn arrow indicator light 9f
Is displayed (for example, 10 seconds) and the standby time (for example, 1 second) until the right-turn arrow indicator light 9d is displayed.
0 seconds).

Therefore, this time schedule information is
When transmitting from the roadside transmitting device 5, for example, FIG.
As shown in (c), the information is transmitted as a single information unit (communication unit) at predetermined intervals. Here, one communication unit is, after the header, a standby signal until switching to a green light, a standby time until a straight arrow is displayed,
The transmission is performed in the order of the waiting time until the left-turn arrow is displayed and the waiting time until the right-turn arrow is displayed.

Processing on the in-vehicle device 1 (i) Automatic stop / automatic start control processing of the engine This processing is processing for controlling automatic stop (idling stop) and automatic start of the engine.

As shown in the flowchart of FIG.
In step 100, it is determined whether or not the vehicle is within the communication area of the roadside device 3. For example, it is determined whether the electric wave transmitted from the roadside communication device 5 is equal to or higher than a predetermined electric field intensity. If the determination is affirmative, the process proceeds to step 110, whereas if the determination is negative, the process ends once.

In order to distinguish a radio wave from the roadside communication device 5 (ie, a signal of time schedule information) from other radio waves, for example, information indicating time schedule information is added to a signal to be transmitted. . For example, FIG.
The information can be added to the header shown in (c).

In step 110, the traffic light information is acquired as the traffic light information by the traffic light information acquisition process of FIG.
Time schedule information as shown in (b) is acquired. In the following step 120, the effectiveness of idling stop (automatic stop of idling of the engine) is determined.

In other words, if the signal is switched to green a little later, the engine must be restarted immediately after the idling stop has been executed, and it is expected that fuel consumption and exhaust emissions will be rather deteriorated. Then, it is determined how far the green light is switched. Specifically, based on the time schedule information, for example, it is determined whether or not the time (standby time) until switching to the green light is 10 seconds or more.

If it is determined that the standby time is 10 seconds or longer, it is considered that execution of the idling stop is effective (fuel consumption and exhaust emission can be improved), and the routine proceeds to step 130, On the other hand, if it is determined that the standby time is shorter than 10 seconds, it is considered that execution of the idling stop is invalid (the fuel efficiency and the exhaust emission cannot be improved), and the present process is temporarily terminated.

At step 130, it is determined whether or not a condition for executing the idling stop is satisfied by the automatic stop / automatic start determination process of FIG. 7 described later. Here, when it is determined that the condition for executing the automatic stop of the engine has been satisfied, the process proceeds to step 140. On the other hand, when it is determined that the condition is not satisfied, the present process is temporarily ended. .

In step 140, the engine is automatically stopped. For example, fuel injection is prohibited, and fuel ignition is prohibited. Therefore, by the above-described processing, the vehicle stops at the position of the stop line before the intersection, for example, with the engine stopped.

In the following step 150, the above step 1
Similarly to 10, the time schedule information is acquired as the traffic light information. In the following step 160, it is determined whether or not it is time to start the automatic start of the engine.

That is, when the vehicle is permitted to travel by a traffic light (for example, when the traffic light is switched to blue), it is desirable to start the vehicle quickly. Must be started. Therefore, here, it is determined whether or not the start timing is appropriate for quick start.

More specifically, for example, it is determined whether or not the standby time at which the signal is switched is 2 seconds or less. Here, if it is determined that the standby time is less than 2 seconds, the process proceeds to step 170, while if it is determined that the standby time is 2 seconds or more,
Returning to step 150, the same processing is repeated.

At step 170, it is determined whether or not the condition for executing the automatic start of the engine is satisfied by the automatic stop / automatic start determination processing of the engine.
Here, when it is determined that the condition for executing the automatic start of the engine has been satisfied, the process proceeds to step 180. On the other hand, when it is determined that the condition is not satisfied, the process proceeds to step 190.

In step 180, since the condition for automatic start of the engine is satisfied, the automatic stop of the engine is executed, and the present process is ended once. For example, the starter is driven and the fuel is injected to ignite the fuel. On the other hand, in step 190, since the condition for automatic start of the engine is not satisfied, the fact is notified to the driver, and the present process is ended once.

Specifically, the contents of the display device 37 (for example, "the side brake is not applied")
Is displayed. At the same time, the contents are notified by voice through the speaker 39. Therefore, by the processing described above,
Automatic stop and start of the engine can be performed based on the time schedule information.

(Ii) Automatic Stop / Automatic Start Judgment Processing This processing is performed in steps 130 and 17 in FIG.
0 is a process for determining whether to automatically stop or start the engine automatically. As shown in the flowchart of FIG. 6, in step 200, the state of the side brake is determined.
Specifically, it is determined based on a signal from the side brake switch 27 whether the side brake is applied (locked) or not (unlocked). If the determination is affirmative, the process proceeds to step 210, while if the determination is negative, the process proceeds to step 240.

In step 240, since the conditions for the automatic stop or automatic start of the engine are not satisfied, a flag (for example, an automatic flag) indicating the condition is reset (set to 0), and the present process is ended once. . On the other hand, in step 210, the AT shift state is determined. Specifically, based on a signal from the AT shift position sensor 29, it is determined whether or not the AT shift position is in a P (parking) range. If the determination is affirmative, the process proceeds to step 220, while if the determination is negative, the process proceeds to step 220.
Proceed to 40.

In the case of a manual vehicle, the state of the manual transmission (MT) is determined, and it is determined whether the shift position of the MT is neutral. Here, if the determination is affirmative, the process proceeds to step 220, and if the determination is negative, the process proceeds to step 240.

In step 220, it is determined whether the vehicle speed is 0 km / h based on the signal from the vehicle speed sensor 31. If the determination is affirmative, the process proceeds to step 230, while if the determination is negative, the process proceeds to step 240.
In step 230, it is considered that the conditions for the automatic stop or automatic start of the engine are satisfied, and a flag (for example, an automatic flag) indicating the condition is set (set to 1), and the present process is ended once.

Therefore, in the present process, it is possible to determine whether the engine is to be automatically stopped or automatically started based on the automatic flag set as described above. That is, when the automatic flag is set, the engine can be automatically stopped or automatically started. On the contrary, when the automatic flag is reset, the automatic start or automatic stop of the engine is prohibited.

(Iii) Signal Information Acquisition Processing This processing corresponds to steps 110 and 15 in FIG.
This is a process for acquiring traffic signal information performed at 0. As shown in the flowchart of FIG.
Then, the time schedule information of the traffic light 7 is obtained from the signal transmitted from the roadside communication device 5.

In the following step 310, it is determined on the basis of the information from the direction indicator sensor 33 how the direction indicator is operated. Here, if the direction indicator has been operated to turn left, step 32
The process proceeds to 0, a left traveling permission time schedule is selected, and the present process is ended once.

That is, based on the time schedule information as shown in FIG. 4 (b), for example, the shortest signal display standby time capable of proceeding to the left is obtained, that is, the green signal standby time (for example, 20 seconds) and the left turn. The waiting time of the arrow (for example, 10
Second) and the shorter one is selected as the standby time in this case (thus 10 seconds).

If the direction indicator has not been operated, the routine proceeds to step 330, where a forward-progress permission time schedule is selected, and the present process is ended once. For example, FIG.
Based on the time schedule information as shown in (b),
The standby time of the green light (for example, 20 seconds) is selected as the standby time in this case.

Further, if the direction indicator has been operated to turn rightward, the process proceeds to step 340, where a rightward travel permission time schedule is selected, and the present process is terminated once. For example, based on the time schedule information as shown in FIG. 4 (b), the shortest signal display standby time capable of traveling right is obtained, that is, the green signal standby time (for example, 20 seconds).
Is compared with the waiting time of the right-turn arrow (for example, 10 seconds), and the shorter one is selected as the waiting time (accordingly, 10 seconds) in this case.

Therefore, in this processing, as described above,
An appropriate standby time can be selected according to the traveling direction of the vehicle. f) As described above, in the present embodiment, since the time-schedule information of the signal is transmitted from the road-side device 3 provided in the traffic light 7 by broadcast, the in-vehicle device 1 that has received the time-schedule information performs the time-scheduling. According to the information waiting time, the control of automatic stop and automatic start of the engine can be suitably performed at the time of stopping at an intersection or the like.

That is, if there is a sufficient waiting time until the signal is switched (when the predetermined condition is satisfied)
By automatically stopping the engine, fuel consumption and exhaust emissions can be reduced. In addition, when the standby time becomes short while the engine is stopped, the engine is automatically started (when a predetermined condition is satisfied), for example, when the traffic light is switched to green,
You can start quickly.

Further, in this embodiment, the standby time until the green light is compared with the standby time indicated by the arrow such as right turn or left turn, and the shorter one is set as the standby time. A quick start can be performed more suitably. In addition, in this embodiment, DS
By the RC radio, the time schedule information can be transmitted only to the vehicle near the stop position in the specific transmission area, that is, the lane corresponding to the signal, so that vehicles in other unrelated lanes (for example, oncoming lanes or intersecting lanes) There is an advantage that there is no possibility of transmitting wrong time schedule information.

It should be noted that the present invention is not limited to the above-described embodiment at all, and it goes without saying that the present invention can be implemented in various modes without departing from the present invention. (1) For example, in the above-described embodiment, the in-vehicle apparatus has been described. However, the present invention is not limited thereto, and can be applied to a recording medium storing means for executing the above-described processing.

As the recording medium, an electronic control unit configured as a microcomputer, a microchip,
Various recording media such as a floppy disk, a hard disk, and an optical disk are included. That is, there is no particular limitation as long as it stores means such as a program that can execute the above-described processing of the in-vehicle device.

The present invention can, of course, be applied to the program itself recorded on, for example, the above-described recording medium. (2) In the above-described embodiment, the control of the engine when the vehicle stops is taken as an example. However, if the above-described time schedule information is transmitted to the traveling vehicle, for example, when the vehicle approaches a traffic light In addition, control such as automatically reducing the speed can be performed.

(3) The above-mentioned time schedule information is not only received by the on-vehicle device of the automobile, but also mounted on a motorcycle or the like as a portable device. Emission control is possible.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram illustrating an outline of a communication system according to an embodiment;

FIG. 2 is an explanatory diagram showing facilities near a road and a communication area thereof in the embodiment.

FIG. 3 is a block diagram illustrating an electrical configuration of a device used in the communication system according to the embodiment;

FIG. 4A is an explanatory diagram showing a signal display unit, and FIG.
Is an explanatory diagram showing time schedule information, and (c) is an explanatory diagram showing a communication unit of the time schedule information.

FIG. 5 is a flowchart illustrating idling stop control processing according to the embodiment;

FIG. 6 is a flowchart illustrating processing for controlling automatic stop and automatic start of the engine according to the embodiment.

FIG. 7 is a flowchart illustrating a process of acquiring traffic signal information according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... In-vehicle apparatus 3 ... Roadside apparatus 5 ... Roadside communication apparatus 7 ... Traffic signal 9 ... Display part 11 ... Car side communication apparatus

Continued on the front page F-term (reference) 3G092 AC03 CA01 DE01S FA18 FA24 FA30 FA47 GA01 GA10 GB10 HF12Z HF21Z HF26Z 3G093 AA01 BA19 BA20 BA21 BA22 BA26 CA01 CA02 CB01 DA13 DB06 DB11 DB15 FA12 5H180 AA01 BB02 BB04 BB02 BB04 BB02

Claims (12)

[Claims]
1. A communication system for transmitting necessary information wirelessly from a transmitter on a road side to the surroundings thereof, wherein signal information relating to a display time of a signal indicated by a traffic signal is transmitted as the information. Communication system.
2. The signal transmission device according to claim 1, wherein the transmission device is disposed near the traffic light or the traffic light.
A communication system according to claim 1.
3. The communication system according to claim 1, wherein the transmission device is configured to transmit signal information to vehicles on the road.
4. The communication system according to claim 3, wherein the transmission device is configured to transmit signal information to a vehicle stopped at a predetermined stop position on the road. .
5. The communication system according to claim 1, wherein the transmission is transmission by DSRC radio.
6. The communication system according to claim 1, wherein the signal information is information indicating a time until a display of a current signal changes.
7. The communication system according to claim 6, wherein the signal information is information indicating a time until the traveling of the vehicle is permitted.
8. An in-vehicle device used in the communication system according to claim 1, wherein an engine of the vehicle is automatically stopped based on signal information transmitted from the transmitting device on the road side. An in-vehicle device for performing at least one of automatic stop control and automatic start control for performing automatic start.
9. The automatic stop control according to claim 1, wherein when the vehicle stops, if the time until the advance of the vehicle is permitted is equal to or less than a first determination time, the execution of the automatic stop control is prohibited. 9. The in-vehicle device according to 8.
10. The method according to claim 1, wherein when the vehicle is stopped, if the time until the advance of the vehicle is permitted is equal to or less than a second determination time, execution of the automatic start control is permitted. The in-vehicle device according to claim 8.
11. The on-vehicle device used in the communication system according to any one of claims 1 to 7, further comprising a notifying unit that notifies a driver of signal information transmitted from the transmitting device on the road side. An in-vehicle device characterized by the above-mentioned.
12. A recording medium storing means for realizing the function of the in-vehicle device according to any one of claims 8 to 11.
JP2001036836A 2001-02-14 2001-02-14 Communication system, on-vehicle device and recording medium Pending JP2002245587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001036836A JP2002245587A (en) 2001-02-14 2001-02-14 Communication system, on-vehicle device and recording medium

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Application Number Priority Date Filing Date Title
JP2001036836A JP2002245587A (en) 2001-02-14 2001-02-14 Communication system, on-vehicle device and recording medium

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Publication Number Publication Date
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JP2008242569A (en) * 2007-03-26 2008-10-09 Sumitomo Electric Ind Ltd Vehicle control system, in-vehicle device and vehicle
JP4715788B2 (en) * 2007-03-26 2011-07-06 住友電気工業株式会社 Vehicle control system, in-vehicle device, and vehicle
JP2010062731A (en) * 2008-09-02 2010-03-18 Nec Corp Device for measuring telephone call quality, and system, method and program of same
JP2010134851A (en) * 2008-12-08 2010-06-17 Toyota Motor Corp Driving support device
JP2010146547A (en) * 2008-12-17 2010-07-01 Korea Electronics Telecommun Device and method for processing traffic signal information for idling stop
KR101118947B1 (en) * 2009-01-13 2012-02-27 도요타 지도샤(주) Driving assistance device
WO2010082302A1 (en) * 2009-01-13 2010-07-22 トヨタ自動車株式会社 Driving assistance device
JP5041076B2 (en) * 2009-01-13 2012-10-03 トヨタ自動車株式会社 Driving assistance device
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US8917189B2 (en) 2009-01-13 2014-12-23 Toyota Jidosha Kabushiki Kaisha Driving assistance Device
JP2010198197A (en) * 2009-02-24 2010-09-09 Toyota Motor Corp Driving support device and method
JP2010282421A (en) * 2009-06-04 2010-12-16 Toyota Motor Corp Driving support device
JP2011129089A (en) * 2009-12-21 2011-06-30 Korea Electronics Telecommun Control device and method for active idle stop of route bus
JP2012003351A (en) * 2010-06-14 2012-01-05 Sanyo Electric Co Ltd Terminal device
JP2012031818A (en) * 2010-08-02 2012-02-16 Denso Corp Engine automatic control system
US8532843B2 (en) 2010-08-02 2013-09-10 Denso Corporation Engine automatic control system
KR101799410B1 (en) * 2011-05-20 2017-12-20 삼성전자주식회사 Apparatus and method for controlling automobile in portable terminal

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