JP2003063274A - Control system for distance between two vehicles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control system for a distance between two vehicles capable of controlling a stop lamp with high reliability by an inexpensive configuration. SOLUTION: When a distance between two vehicles detected by a sensor 1 for distance between two vehicles is shorter than a target distance between two vehicles, a brake start demand signal is transmitted to a brake control ECU 6 by a control ECU 5 for distance between two vehicles, a brake means is pressurized and controlled by the brake control ECU 6, and a brake operation signal is sent at the same time, the brake operation signal is received by the control ECU 5 for distance between two vehicles, and the stop lamp 8 is lit. On the other hand, when a distance between two vehicles detected by the sensor 1 for distance between two vehicles is longer than the target distance between two vehicles, a brake release demand signal is transmitted to the brake control ECU 6 by the control ECU 5 for distance between two vehicles, pressurization and control of the brake means are stopped by the brake control ECU 6, a brake operation stop signal is transmitted at the same time, the brake operation stop signal is received by the control ECU 5 for distance between two vehicles, and the stop lamp 8 is turned off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects an inter-vehicle distance between a host vehicle and a preceding vehicle traveling in the same lane, and controls acceleration / deceleration means to control the inter-vehicle distance to be equal to or greater than a target inter-vehicle distance according to the own vehicle speed. The present invention relates to an inter-vehicle distance control system.

[0002]

2. Description of the Related Art In general, an inter-vehicle distance control system mounted as an aid for safe running of an automobile has a vehicle speed of 5
60m at 0km / h, 1 at 100km / h
A target inter-vehicle distance is determined according to the own vehicle speed, which is the speed of the own vehicle, such as 00m, and the inter-vehicle distance between the own vehicle and a preceding vehicle traveling in the same lane is detected by an inter-vehicle distance detecting means including an inter-vehicle distance sensor. However, if the detected inter-vehicle distance is smaller than the target inter-vehicle distance, the braking means is forcibly activated and the braking pressure is automatically applied to the wheels to decelerate to maintain the actual detected inter-vehicle distance at the target inter-vehicle distance. It is designed to be controlled.

As such a braking means, for example,
Some include an actuator having a pressurizing source, which controls the actuator by a control signal based on an inter-vehicle distance or the like, supplies brake oil to the wheel cylinder from the actuator, and applies a braking pressure to the wheel cylinder.

On the other hand, as an aid to safe running of an automobile, a side-slip control system has also been proposed which detects the side-slip of the vehicle and pressurizes the brake means to prevent the side-slip, and such a side-slip control system is already installed. In such a vehicle, it is considered that the above-mentioned inter-vehicle distance control can be performed by utilizing the pressurizing control function of the brake means in the side slip control system.

[0005]

However, when the brake means is pressure-controlled by the driver's operation of the brake pedal, the operation of the brake pedal is detected by turning on the brake pedal switch, and the stop lamp is turned on. Whereas the control can be performed, when the pressurization control of the brake means is performed in the side slip control system, the brake pedal switch is not turned on and the stop lamp is not turned on.

Moreover, in the case of the side slip control, since the operation notification of the brake means is not basically required for the following vehicle, the ECU for the side slip control system is usually provided with
The stop lamp drive control function is not added, and the stop lamp does not light up even if the braking means operates based on the side slip control system.

Therefore, it is conceivable to add to the brake control device for controlling the braking means a function of detecting that a command for pressurizing the braking means is issued by the inter-vehicle distance control system and turning on the stop lamp. However, adding such a function to the brake control device causes a problem that the cost of the brake control device increases.

Further, it is also considered to independently control the stop lamp in the inter-vehicle distance control system. For example, the stop lamp is turned on by the inter-vehicle distance control system while the inter-vehicle distance control system issues a command to press the brake means to the brake control device.

However, in this case, even if the inter-vehicle distance control system issues a pressurizing command, it is not known whether or not the brake means is actually pressurizing controlled in accordance with the command.
In reality, the stop lamp may light up even if the brake is not applied, which is unreliable.

Therefore, it is an object of the present invention to provide a system for controlling a stop lamp in an inter-vehicle distance control system, which is inexpensive and can control a stop lamp with high reliability.

[0011]

In order to achieve the above object, the present invention detects an inter-vehicle distance between an own vehicle and a preceding vehicle traveling in the same lane by an inter-vehicle distance detecting means and a vehicle speed detecting means. The vehicle speed is detected by the vehicle-to-vehicle distance detection means, the inter-vehicle distance detected by the vehicle-interval distance detecting means derives the relative speed from the preceding vehicle, and the relative speed thus derived and the vehicle speed by the vehicle-speed detecting means determine the inter-vehicle distance. An inter-vehicle distance for deriving a target acceleration / deceleration for maintaining the target inter-vehicle distance or more according to the own vehicle speed, and controlling the pressurization of the brake means by the brake control device when decelerating to the derived target acceleration / deceleration. In the control system, when the inter-vehicle distance detected by the inter-vehicle distance detecting means becomes shorter than the target inter-vehicle distance, a brake start request to the brake control device. A brake request unit which generates a No.,
A communication unit that transmits the brake start request signal from the brake request unit to the brake control device, and receives a brake actuation signal transmitted from the brake control device in response to the brake start request signal, and the communication unit. And a lamp driving unit that lights a stop lamp when the brake operation signal is received.

According to this structure, when the inter-vehicle distance detected by the inter-vehicle distance detecting means becomes shorter than the target inter-vehicle distance, the brake request request signal is generated by the brake request section, and the brake start request signal is sent by the communication section. Sent.

Then, when the brake operating signal transmitted from the brake control device in response to the brake start request signal is received by the communication section, the lamp drive section
The stop lamp is turned on.

Therefore, the stop lamp can be turned on by the lamp driving unit after surely recognizing that the brake means is operated by the brake control device in response to the brake start request signal.

Further, according to the present invention, the brake request unit is
When the detected inter-vehicle distance by the inter-vehicle distance detecting means becomes longer than the target inter-vehicle distance, a brake release request signal for the brake control device is generated, and the communication unit causes the brake release request signal by the brake request unit. To the brake control device, and receives a brake operation stop signal transmitted from the brake control device in response to the release request, and the lamp drive unit,
The stop lamp is turned off when the brake operation stop signal is received by the communication unit.

With such a configuration, when the inter-vehicle distance detected by the inter-vehicle distance detecting means becomes longer than the target inter-vehicle distance, the brake release request signal is generated by the brake request section, and the brake release request signal is sent by the communication section. On the other hand, when the communication unit receives the brake operation stop signal transmitted from the brake control device in response to the brake release request signal, the lamp driving unit turns off the stop lamp.

Therefore, it is possible to turn off the stop lamp by the lamp drive unit after surely recognizing that the braking means has been deactivated by the brake control device in response to the brake release request signal, and control the lighting of the stop lamp. In addition to this, it is possible to reliably control the turning off of the stop lamp.

Further, according to the present invention, the lamp drive unit has a predetermined time elapsed after the communication unit transmits the brake start request signal or the brake release request signal to the brake control device. Even if the brake operation signal or the brake operation stop signal from the brake control device is not received, the stop lamp is held in the off state.

According to this structure, the communication section allows
If the brake control device does not transmit the brake operation signal or the brake operation stop signal even if a predetermined time has elapsed after the brake start request signal or the brake release request signal is transmitted, the brake control device It is possible to determine that a side abnormality or a communication abnormality between the communication unit and the brake control device has occurred. Furthermore, when it can be determined that such an abnormality has occurred, it is possible to take measures such as canceling the system operation.

Further, according to the present invention, the brake control is performed even if a predetermined time has elapsed from the transmission of the brake start request signal or the brake release request signal to the brake control device by the communication unit. When the brake actuation signal or the brake actuation stop signal from the device is not received, an announcing unit is provided for notifying as an abnormality of the brake control device or a communication error between the communication unit and the brake control device. It is characterized by

According to such a configuration, the driver has some abnormality in the brake control device or the communication abnormality between the communication unit and the brake control device based on the notification from the notification unit. You can recognize that.

Further, according to the present invention, there is provided a brake control device for pressurizing and controlling the brake means, and the brake control for detecting an event such as a side slip of the vehicle which requires pressurizing control of the brake means and preventing the event. A system provided with a command device for giving a control command to the device, and a vehicle-interval distance detecting means for detecting an inter-vehicle distance between the own vehicle and a preceding vehicle traveling in the same lane, and a vehicle speed detecting means for detecting the own vehicle speed. The command device generates a brake start request signal to the brake control device when the detected inter-vehicle distance by the inter-vehicle distance detecting means becomes shorter than the target inter-vehicle distance, and the detected inter-vehicle distance is the target. A brake request unit that generates a brake release request signal to the brake control device when the vehicle distance becomes longer than the inter-vehicle distance, and the brake request unit outputs the brake release request signal. A brake start request signal and the brake release request signal to the brake control device, and the brake operation signal and the brake release request signal sent from the brake control device in response to the brake start request signal. Accordingly, a communication unit that receives a brake operation stop signal transmitted from the brake control device, and a stop lamp is turned on when the brake operation signal is received by the communication unit, and the brake operation stop signal is received. And a vehicle speed detecting means for deriving the relative speed between the own vehicle and the preceding vehicle from the inter-vehicle distance detected by the inter-vehicle distance detecting means. In order to keep the detected inter-vehicle distance from the vehicle speed of Deriving a target deceleration, it is characterized in that Gosuru pressurization of the brake means by the brake control apparatus such that the derived the target deceleration.

According to this structure, when the command device detects a phenomenon such as a side slip of the own vehicle that requires pressurization control of the brake means and gives a control command to the brake control device, this command is issued. The inter-vehicle distance can be controlled by utilizing the pressurizing control function of the braking means by the brake control device of the device. In this case, by communication between the communication unit of the command device and the brake control device, it is possible to reliably recognize whether the braking means has operated or stopped,
It is possible to provide a system capable of reliably controlling the stop lamp with an inexpensive configuration without adding a new function to the brake control device and increasing the cost as in the prior art.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Regarding one embodiment of the present invention,
Description will be made with reference to FIGS. 1 to 3. However, FIG. 1 is a block diagram, and FIGS. 2 and 3 are flowcharts for explaining the operation. The vehicle in this embodiment is intended for an automobile equipped with a sideslip control system.

As shown in FIG. 1, an inter-vehicle distance sensor 1 serving as an inter-vehicle distance detecting means composed of, for example, a scanning laser radar irradiates a laser beam in front of the own vehicle and at a predetermined angle (for example, 0.1 °). The vehicle is scanned in the horizontal direction, the reflected light is received by the light receiver, and the distance between the vehicle and the preceding vehicle traveling in the same lane is detected from the time from the irradiation of the laser light to the reception of the reflected light. The time required to perform such a single inter-vehicle distance detection process is approximately 100 m.
This is a short time of about s, and this detection operation is repeated at regular intervals.

Further, a wheel speed sensor 2 as a vehicle speed detecting means for detecting the own vehicle speed is provided corresponding to each wheel, and various operation switches 3 such as a setting switch for follow-up running control are provided. Then, signals from the sensors 1 and 2 and the operation switch 3 are taken in by an electronic control unit (hereinafter, referred to as an inter-vehicle distance control ECU) 5 for inter-vehicle distance control, and the inter-vehicle distance control ECU 5 controls each part.

Further, a brake control ECU 6 is provided,
The brake control ECU 6 constitutes a side slip control system together with a command device that detects a side slip from the rotational speed difference of the wheel speed sensor 2 provided on each wheel and gives a pressure command to the brake control ECU 6 to suppress the side slip. In response to this pressurizing command, the brake control ECU 6 forcibly pressurizes the braking means (not shown) to apply a predetermined braking force to the wheels to be controlled to prevent side slip.

By the way, the inter-vehicle distance control ECU 5 is the brake control ECU 6 in such a side slip control system.
Using the pressure control function for the braking means by
Holds and controls the inter-vehicle distance from the preceding vehicle. That is, from the detected inter-vehicle distance from the preceding vehicle detected by the inter-vehicle distance sensor 1,
In addition to deriving the relative speed between the own vehicle and the preceding vehicle, deriving the target inter-vehicle distance according to the own vehicle speed by the wheel speed sensor 2 at that time, and calculating the inter-vehicle distance from the derived relative speed and the own vehicle speed by the wheel speed sensor 2. A target acceleration / deceleration (in this case, a target deceleration in particular) for maintaining the inter-vehicle distance actually detected by the sensor 1 at the target inter-vehicle distance is derived, and a brake control ECU, which is a brake control device, so that the derived target deceleration is achieved.
6 and the brake control ECU 6 controls the pressurization of the brake means.

Here, the braking means is provided with an actuator having a pressurizing source, and the actuator is controlled by a control signal from the brake control ECU 6 to supply the brake oil to the wheel cylinders and apply the braking pressure to the wheel cylinders. It is desirable to have a configuration that does.

The inter-vehicle distance control ECU 5 generates a brake start request signal to the brake control ECU 6 when the inter-vehicle distance detected by the inter-vehicle distance sensor 1 becomes shorter than the target inter-vehicle distance. When it becomes longer, a brake release request signal to the brake control ECU 6 is generated.

Further, the headway distance control ECU 5 transmits the brake start request signal and the brake release request signal to the brake control ECU 6, and the brake actuation signal and the brake which are transmitted from the brake control ECU 6 in response to the brake start request signal. The brake operation stop signal transmitted from the brake control ECU 6 is received in response to the release request signal.

The generation processing of the brake start request signal and the brake release request signal by the vehicle distance control ECU 5 corresponds to the brake request section, and the communication processing with the brake control ECU 6 corresponds to the communication section.

By the way, the inter-vehicle distance control ECU 5 controls the lighting of the stop lamp 8 when it receives a brake operation signal from the brake control ECU 6, and when it receives a brake operation stop signal from the brake control ECU 6.
Turn off the light. The process of turning on and off the stop lamp 8 by the inter-vehicle distance control ECU 5 corresponds to the lamp driving unit.

Further, as shown in FIG. 1, an alarm buzzer, an alarm lamp, etc. are provided to provide an alarm unit 9, and the inter-vehicle distance control ECU 5 operates when the inter-vehicle distance from the preceding vehicle is too close to the target inter-vehicle distance. The notifying unit 9 is controlled, the notifying unit 9 is activated to issue an alarm to the driver, and the brake control ECU 6
Even if a predetermined time t has elapsed since the brake start request signal or the brake release request signal was transmitted to
If no brake operation signal or brake operation stop signal from the brake control ECU 6 is received, it is determined that an abnormality of the brake control ECU 6 or an abnormality in communication with the brake control ECU 6 has occurred, and the notifying unit 9 is controlled to notify that effect. Notify me.

At this time, it is preferable to change the notification method for such an abnormality and the notification method for the inter-vehicle distance. For example, the notification sound pattern is changed for notification by the alarm buzzer, and the blinking pattern is changed for the alarm lamp. It is possible to change it.

Next, the operation will be described with reference to the flow charts of FIGS. As shown in FIG. 2, the inter-vehicle distance control ECU 5 takes in the inter-vehicle distance detected by the inter-vehicle distance sensor 1 and derives the relative speed between the host vehicle and the preceding vehicle from the detected inter-vehicle distance (S1).
The vehicle speed by the wheel speed sensor 2 is taken in (S2), the target inter-vehicle distance according to this vehicle speed is derived, and actual detection by the inter-vehicle distance sensor 1 is performed from the derived relative speed and the vehicle speed by the wheel speed sensor 2. A target deceleration for maintaining the inter-vehicle distance at the target inter-vehicle distance is derived (S3).

Then, as shown in FIG. 2, it is judged whether deceleration control is necessary or not depending on whether the inter-vehicle distance detected by the inter-vehicle distance sensor 1 is shorter or longer than the target inter-vehicle distance (S).
4) If the result of this determination is YES, the headway control ECU
A brake start request signal is transmitted from 5 to the brake control ECU 6 (S5), and the brake means is pressurized by the brake control ECU 6 in response to the brake start request signal.

Then, the information from the brake control ECU 6 is received by the inter-vehicle distance control ECU 5 (S6), and based on whether the information is a brake actuation signal due to pressurization control of the brake means in response to the brake start request signal. It is determined whether there is brake start information (S7).

If the determination result of this step S7 is YES, the inter-vehicle control ECU 5 controls the lighting of the stop lamp 8 (S8), and then returns to the start, and the step S
If the determination result of 7 is NO, it is possible to determine that the brake operation signal is not received from the brake control ECU 6 and the braking means is not under pressure control.
It is determined whether or not a predetermined time t has elapsed since the brake start request signal was transmitted from U5 to the brake control ECU 6 (S9). If the determination result is NO, the stop lamp 8 is controlled to be turned off (S10). ), Then return to the start.

On the other hand, if the decision result in the above-mentioned step S9 is YES, no brake actuation signal is received from the brake control ECU 6 even after the elapse of the predetermined time t. Therefore, abnormality of the brake control ECU 6 or inter-vehicle distance control EC
Since it can be determined that a communication abnormality between the U5 and the brake control ECU 6 has occurred, the operation of the entire system is canceled (S11), and the abnormality is notified by the notification unit 9.
After the stop lamp 8 is held in the off state (S1
2) Return to the start.

By the way, if the decision result in the above-mentioned step S4 is NO, as shown in FIG.
A brake release request signal is transmitted from 5 to the brake control ECU 6 (S13), and pressurization control of the brake means by the brake control ECU 6 is stopped in response to the brake release request signal.

Then, the information from the brake control ECU 6 is received by the inter-vehicle distance control ECU 5 (S14), and whether the information is a brake operation stop signal due to stopping the pressurization control of the brake means in response to the brake request signal. Based on the above, it is determined whether or not there is brake stop information (S15).

If the decision result in the step S15 is NO, it can be judged that the brake operation stop signal is not received from the brake control ECU 6 and the pressurization control of the brake means is not stopped. It is determined whether or not a predetermined time t has elapsed since the brake release request signal was transmitted to the brake control ECU 6 (S1).
6) If the result of this determination is NO, the stop lamp 8
Since it is necessary to turn on the
The stop lamp 8 is controlled to be lit by (S17), and then the process returns to the start.

On the other hand, if the decision result in the above-mentioned step S15 is YES, it is necessary to turn off the stop lamp 8 by receiving a brake operation stop signal from the brake control ECU 6, so that the stop lamp 8 is turned off by the inter-vehicle distance control ECU 5. The turn-off control is performed (S18), and then the process returns to the start.

If the determination result of step 16 is YES, the determination result of step 9 is YE.
Similar to the case of S, since the brake operation stop signal is not received from the brake control ECU 6 even after the elapse of the predetermined time t, the brake control ECU 6 has an abnormality, or the communication error between the vehicle distance control ECU 5 and the brake control ECU 6 has occurred. Since it can be determined that the error occurs, the operation proceeds to step S11 and the operation of the entire system is canceled (S1
1) After the abnormality is notified by the notification unit 9 and the stop lamp 8 is held in the off state (S12), the process returns to the start.

Thus, when the inter-vehicle distance detected by the inter-vehicle distance sensor 1 becomes shorter than the target inter-vehicle distance, the inter-vehicle distance control E
A brake start request signal is generated by the CU 5 and is transmitted to the brake control ECU 6. The brake control ECU 6 controls the pressurization of the brake means in response to the brake start request signal, and at the same time, a brake actuation signal is transmitted and the brake is activated. When the operation signal is received by the inter-vehicle distance control ECU 5, the inter-vehicle distance control ECU 5 causes the stop lamp 8
Is lit.

On the other hand, when the inter-vehicle distance detected by the inter-vehicle distance sensor 1 becomes longer than the target inter-vehicle distance, the inter-vehicle control ECU 5
Generates a brake release request signal and transmits it to the brake control ECU 6. In response to this brake release request signal, the brake control ECU 6 stops the pressurization control of the brake means, and at the same time, transmits a brake operation stop signal. This brake operation stop signal is sent to the inter-vehicle control ECU 5
Is received, the stop lamp 8 is turned off by the inter-vehicle distance control ECU 5.

Therefore, according to the above embodiment, when the side slip control ECU is also used as the headway distance control ECU 5,
In response to the brake start request signal and the brake release request signal, the brake control ECU 6 can surely recognize that the brake means has been activated and stopped, and then the inter-vehicle control ECU 5 can turn on and off the stop lamp 8. It is possible to provide a system capable of reliably controlling the stop lamp 8 with an inexpensive configuration without adding a new function to the brake control ECU 6 and increasing the cost as in the conventional case.

Furthermore, the driver easily recognizes that some abnormality has occurred in the brake control ECU 6 or communication abnormality between the inter-vehicle distance control ECU 5 and the brake control ECU 6 based on the notification from the notification unit 9. can do.

In the above embodiment, the inter-vehicle distance control E
CU5 and brake control ECU of the sideslip control system
6 (brake control device) has been described above, but in the case of a vehicle that does not have a skid control system, the brake control ECU 6 is a brake control device dedicated to the inter-vehicle distance control that is unrelated to the skid control. Needless to say, it does not matter.

Further, in the above-described embodiment, the case where the command device constitutes the side slip control system together with the brake control ECU 6 is taken as an example, but the command device according to the present invention is not limited to the side slip control, and in short, the command The device may be any device as long as it gives a control command to the brake control ECU 6 in order to prevent an event of the own vehicle that requires pressure control of the brake means.

Further, in the above embodiment, the inter-vehicle distance control E
Even if a predetermined time t has elapsed since the brake start request signal or the brake release request signal was transmitted from the CU 5, when the brake operation signal or the brake operation stop signal is not received from the brake control ECU 6, the alarm unit 9 notifies that an abnormality has occurred. Although the case has been described where the notification is made, it is not always necessary to make such an abnormality notification.

Further, in the above-described embodiment, the case where the inter-vehicle distance detecting means is the inter-vehicle distance sensor 1 composed of the scan laser radar has been described, but the inter-vehicle distance detecting means is limited to such inter-vehicle distance sensor 1. Of course not. In addition, the notification unit 9 may be configured by a voice synthesizer that issues a predetermined voice message.

The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

[0055]

As described above, according to the first aspect of the present invention, the lamp drive unit is surely recognized after the brake control device recognizes that the brake means is operated in response to the brake start request signal. Thus, the stop lamp can be turned on, and it is possible to provide an inter-vehicle distance control system that can reliably control the stop lamp with an inexpensive configuration.

According to the second aspect of the present invention, the brake driving device surely recognizes that the brake means has been deactivated in response to the brake release request signal, and then the lamp driving unit operates the stop lamp. It is possible to turn off the light, and in addition to controlling the lighting of the stop lamp, it is possible to reliably perform the light-off control of the stop lamp.

Further, according to the invention described in claim 3, even if a predetermined time elapses after the brake start request signal or the brake release request signal is transmitted by the communication unit, the brake control device transmits the signal. If no brake operation signal or brake operation stop signal is sent,
It is possible to determine that there is an abnormality on the brake control device side or an abnormality in communication between the communication unit and the brake control device.

Further, when it is possible to judge the occurrence of such an abnormality, it becomes possible to take measures such as canceling the system operation.

Further, according to the invention described in claim 4, the driver causes some abnormality in the brake control device based on the notification from the notification unit, or the communication error occurs between the communication unit and the brake control device. It becomes possible to recognize that is occurring.

According to the fifth aspect of the present invention, the command device detects an event that requires pressurization control of the brake means such as a side slip of the vehicle and gives a control command to the brake control device. At this time, the inter-vehicle distance control can be performed by utilizing the pressurization control function of the brake means by the brake control device of the command device. In this case, communication between the communication unit of the command device and the brake control device can be performed. This makes it possible to reliably recognize whether the braking means has been activated or deactivated, without adding a new function to the brake control device as in the past and incurring an increase in cost. It becomes possible to provide an inter-vehicle distance control system capable of controlling a stop lamp well.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment of the present invention.

FIG. 3 is a flowchart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

1 Inter-vehicle distance sensor (inter-vehicle distance detection means) 2 Wheel speed sensor (vehicle speed detection means) 5 Inter-vehicle control ECU 6 Brake control ECU (brake control device) 8 stop lamps 9 Notification section

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B60T 7/12 B60T 7/12 C F02D 29/02 301 F02D 29/02 301D G08G 1/16 G08G 1/16 EF Term (Reference) 3D044 AA25 AA35 AB01 AC26 AC28 AC59 AD21 AE01 AE04 AE07 AE14 AE21 3D046 BB01 BB18 CC02 HH20 HH23 HH26 HH36 JJ01 MM10 MM34 CC04 FA14 FA01 DB12 FA04 DB12 FA02 DB01 FA02 DB02 DB02 DB02 DB02 DB23 LL04 LL07 LL09

Claims (5)

[Claims] 1. An inter-vehicle distance detecting means detects an inter-vehicle distance from a preceding vehicle traveling in the same lane as the own vehicle, a vehicle speed detecting means detects an own vehicle speed, and the inter-vehicle distance detecting means detects the inter-vehicle distance. A relative speed with respect to the preceding vehicle is derived from the vehicle, and based on the derived relative speed and the own vehicle speed by the vehicle speed detecting means, a target adjustment for maintaining the detected inter-vehicle distance at a target inter-vehicle distance or more according to the own vehicle speed. In the inter-vehicle distance control system for deriving the speed and decelerating to the derived target acceleration / deceleration, in the inter-vehicle distance control system for pressurizing and controlling the brake means by the brake control device, the inter-vehicle distance detected by the inter-vehicle distance detecting means is A brake request unit that generates a brake start request signal to the brake control device when the distance becomes shorter than the target inter-vehicle distance; And a communication unit that transmits the brake start request signal to the brake control device and receives a brake operation signal transmitted from the brake control device in response to the brake start request signal, and the brake operation by the communication unit. An inter-vehicle distance control system, comprising: a lamp driving unit that lights a stop lamp when a signal is received. 2. The brake request unit generates a brake release request signal to the brake control device when the detected inter-vehicle distance by the inter-vehicle distance detecting means becomes longer than the target inter-vehicle distance, the communication unit. Transmits the brake release request signal by the brake request unit to the brake control device, and receives a brake operation stop signal transmitted from the brake control device in response to the brake release request signal to drive the lamp. The inter-vehicle distance control system according to claim 1, wherein the unit turns off the stop lamp when the brake operation stop signal is received by the communication unit. 3. The lamp driving unit, even if a predetermined time has elapsed after the brake start request signal or the brake release request signal is transmitted to the brake control device by the communication unit, The inter-vehicle distance control system according to claim 2, wherein the stop lamp is held in an off state when the brake actuation signal or the brake actuation stop signal from the brake control device is not received. 4. The brake control device outputs the brake start request signal or the brake release request signal to the brake control device by the communication unit even after a predetermined time has elapsed. When a brake actuation signal or the brake actuation stop signal is not received, a notification unit is provided to notify the abnormality as an abnormality of the brake control device or a communication error between the communication unit and the brake control device. The inter-vehicle distance control system according to claim 3, which is characterized in that. 5. A brake control device for pressurizing and controlling the brake means, and a control command for the brake controller to detect an event that requires pressurization control of the brake means such as a side slip of the vehicle and prevent the event. And a vehicle speed detecting means for detecting a vehicle speed, and a vehicle distance detecting means for detecting a vehicle distance between the vehicle and a preceding vehicle traveling in the same lane, The command device generates a brake start request signal to the brake control device when the detected inter-vehicle distance by the inter-vehicle distance detecting means becomes shorter than the target inter-vehicle distance, and the detected inter-vehicle distance is greater than the target inter-vehicle distance. A brake request unit that generates a brake release request signal to the brake control device when the time becomes too long, and the brake start by the brake request unit. Each of the request signal and the brake release request signal is transmitted to the brake control device, and the brake operation signal transmitted from the brake control device in response to the brake start request signal, and the brake release request signal in response to the brake release request signal. A communication unit that receives a brake operation stop signal transmitted from the brake control device, a stop lamp is lit when the brake operation signal is received by the communication unit, and a stop is received when the brake operation stop signal is received. A lamp driving unit that turns off the lamp, and derives the relative speed between the own vehicle and the preceding vehicle from the inter-vehicle distance detected by the inter-vehicle distance detecting means, and derives the relative speed and the own vehicle speed by the vehicle speed detecting means. From the target deceleration for maintaining the detected inter-vehicle distance to be equal to or greater than the target inter-vehicle distance according to the own vehicle speed. An inter-vehicle distance control system is characterized in that the brake control device pressurizes and controls the brake means so that the degree is derived and the derived target deceleration is achieved.