JP6241139B2 - Emergency brake indicator control device - Google Patents

Description

  The present invention relates to an emergency braking indicator light control device.

  In the case of a vehicle, it is considered that a hazard lamp is turned on (flashed) to alert a succeeding vehicle when the vehicle decelerates more than a predetermined threshold. Japanese Patent Application Laid-Open No. H10-260260 discloses a device that performs hazard lamp automatic lighting control using three parameters of vehicle speed, vehicle deceleration, and deceleration width. Specifically, when all the conditions that the vehicle speed is equal to or higher than a predetermined vehicle speed, the vehicle deceleration is equal to or higher than a predetermined threshold (predetermined deceleration), and the vehicle deceleration width is equal to or higher than a predetermined value, the hazard is A device for automatically lighting a lamp is disclosed.

JP 7-125572 A

  By the way, if the predetermined threshold value (predetermined deceleration) is set to a small value, the deceleration increases even with a small brake operation at high vehicle speeds, so the chance that the hazard lamps are automatically turned on increases unnecessarily. This causes annoyance. For this reason, it is conceivable to set the predetermined threshold value to a large value. However, simply increasing the threshold value greatly reduces the chances that the hazard lamp is automatically turned on. In particular, in situations where the vehicle becomes unstable or likely to become unstable, it is desirable to actively alert the following vehicle, but there is also a situation where the hazard lamps are not automatically turned on. It will be easier.

  The present invention has been made in view of the above circumstances, and its purpose is to use a hazard lamp to alert the following vehicle when the vehicle becomes unstable or likely to become unstable. It is an object of the present invention to provide an emergency braking indicator light control device that can sufficiently secure an opportunity for arousing.

In order to achieve the above object, the following solution is adopted in the present invention. That is, as described in claim 1, that is,
A control device for an emergency brake indicator light that automatically lights a hazard lamp when the vehicle suddenly decelerates,
Deceleration detection means for detecting the deceleration of the vehicle;
A lighting control means for turning on a hazard lamp when the deceleration detected by the deceleration detecting means exceeds a predetermined threshold;
ABS control means for preventing wheel locking ;
A threshold value changing means for changing the predetermined threshold value to be smaller when the ABS control means is operating than when it is not operating ;
It is supposed to be equipped with.

According to the above solution, the threshold value is set to a large value during normal times, and it is possible to prevent or suppress a situation in which the hazard lamp is automatically turned on accidentally by a small brake operation at a high vehicle speed. On the other hand, when the ABS control means is in operation, that is , when the vehicle is likely to be unstable or unstable, an opportunity to call attention by automatically turning on the hazard lamp with a small threshold value Can be secured sufficiently.

In particular, when the road surface is likely to slip such that the ABS control means is operated, it is preferable to increase the chance that the hazard lamp is automatically turned on to alert the following vehicle.

  According to the present invention, in a situation where the vehicle becomes unstable or highly likely to become unstable, it is possible to sufficiently secure an opportunity to alert the following vehicle using a hazard lamp.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The block diagram which shows the example of a control system of this invention. The figure which shows the example of a setting of a predetermined threshold value (predetermined deceleration). The flowchart which shows the example of control of this invention.

  In FIG. 1, a preceding vehicle as the own vehicle is indicated by 1, and a succeeding vehicle is indicated by 3. When the preceding vehicle 1 decelerates rapidly, the hazard lamp 2 is automatically turned on (becomes blinking display), and a warning for preventing a rear-end collision or the like is performed on the following vehicle 3. The hazard lamp 2 is composed of left and right direction indicator lamps.

  FIG. 2 shows an example of a control system that is configured in the preceding vehicle 1 and controls the lighting of the hazard lamp 2 automatically. In FIG. 2, reference numeral 10 denotes a drive circuit for the hazard lamp 2. As is known, when the hazard switch 11, which is manually operated by the driver, is turned on, the drive circuit 10 has a hazard lamp 2 (that is, left and right). Both direction indicators) are lit (blinking display). Further, when the turn switch 12 is operated, the left and right hazard lamps 2 (direction indicator lamps) corresponding to the operation direction are turned on (blinking display).

  The drive circuit 10 further turns on the hazard lamp 2 when receiving a lighting command from a controller (control unit) 21 configured using a microcomputer. A vehicle speed signal from the vehicle speed sensor 22 is input to the controller 21. The controller 21 calculates the vehicle deceleration (deceleration detecting means) based on the vehicle speed detected by the vehicle speed sensor 22 (by differentiating the vehicle speed).

  In addition to the vehicle speed signal, the controller 21 receives a signal from the ABS control means 23, a signal from the brake assist control means 24, and a signal from the ESC control means 25. The ABS control means 23 performs control for automatically adjusting the braking force so as to prevent the wheel from being locked (slip) during braking. When the ABS control means 23 is activated, an operation signal is input to the controller 21. The The brake assist control means 24 automatically applies a braking force larger than the braking force corresponding to the brake depression force when it is determined that the driver requests sudden braking (compensates for insufficient braking force). Control), the operation signal is input to the controller 21. The ESC control means 25 is called electric stability control and automatically controls the braking force (distribution) of each wheel in order to stabilize the posture of the vehicle, and the operation signal is input to the controller 21.

  A lighting command from the controller 21 to the drive circuit 10 is issued when the deceleration of the vehicle is equal to or greater than a predetermined threshold G (predetermined deceleration). The predetermined threshold G is normally set as a large value G1 (for example, 0.7 g, g is gravitational acceleration) as shown by a solid line in FIG. This predetermined threshold value G1 corresponds to the case where each of the control means 23, 24, 25 described above is inactive.

  When at least one of the ABS control means 23, the brake assist control means 24, and the ESC control means 25 is operated, the predetermined threshold G is changed to a small value G2 as shown by a broken line in FIG. Corrected). For example, G2 is set to a value that is a predetermined amount or a predetermined percentage smaller than G1 (for example, set to 0.6 g that is 0.1 g smaller than G1). The solid line in FIG. 3 is the basic setting characteristic, and only this basic characteristic is stored in the storage means in the controller 21, and the broken line characteristic is corrected to a value smaller than the basic characteristic by a predetermined amount (for example, 0.1 g). It is made to calculate by. Of course, the characteristics indicated by the broken line can be stored in the storage means separately.

  In FIG. 3, the solid line is typically shown as “when the ABS is not operating”, but is actually “when the ABS is not operating”, “when the brake assist is not operating”, and “when the ESC is not operating”. . Similarly, the broken line in FIG. 3 is representatively shown as “at the time of ABS operation”, but is actually “at the time of ABS operation” or “at the time of brake assist operation” or “at the time of ESC operation”.

  The automatic lighting control of the hazard lamp 2 by the controller 21 is performed as follows, for example. First, basically, the predetermined threshold G is set to G1, which is a large value. As a result, a situation in which the hazard lamp 2 is automatically turned on unnecessarily when a small brake operation is performed at a high vehicle speed is avoided. On the other hand, when at least one of the ABS control means 23, the brake assist control means 24, and the ESC control means 25 is operated, the predetermined threshold value is set to a small value G2. As a result, when the control means 23, 24 or 25 is activated, the hazard lamp 2 is easily turned on, and the opportunity for alerting the following vehicle 3 is increased.

  Next, the control contents of the controller 21 will be described with reference to the flowchart of FIG. Note that the control in FIG. 4 is executed on the assumption that the vehicle speed is greater than or equal to a predetermined vehicle speed (for example, 50 km / h) set in advance during braking (when the vehicle speed is less than the predetermined vehicle speed, the hazard lamp 2 Without automatic lighting). In the following description, Q indicates a step.

  First, at Q1, the vehicle speed V detected by the vehicle speed sensor 22 is read. Next, in Q2, a predetermined threshold G is set based on the vehicle speed V read in Q1, but is initially set as a large value G1 (setting based on the characteristics of the solid line in FIG. 3).

  After Q2, it is determined at Q3 whether or not the ABS control means 23 is operating. If NO in Q3, it is determined in Q4 whether the brake assist control means 24 is operating. If the determination in Q4 is NO, it is determined in Q5 whether or not the ESC control means 25 is operating. If the determination in Q5 is NO, the process proceeds to Q7. On the other hand, if YES in Q3, YES in Q4, or YES in Q5, the process proceeds to Q6 and the predetermined threshold G is set to a small value G2. The Then, after Q6, the process proceeds to Q7.

  In Q7, the actual deceleration β of the vehicle is calculated by differentiating the vehicle speed detected by the vehicle speed sensor 22. Thereafter, at Q8, it is determined whether or not the actual deceleration β is equal to or greater than a predetermined threshold value G. If NO in Q8, the process returns to Q1 (no hazard lamp 2 is automatically turned on). If YES in Q8, the hazard lamp 2 is automatically turned on in Q9 (a lighting command signal is output from the controller 21 to the drive circuit 10).

  After Q9, at Q10, it is determined whether or not a predetermined time (for example, 3 to 5 seconds) set in advance has elapsed since the hazard lamp 2 was automatically turned on. If the determination in Q10 is NO, the process returns to Q9 (continuation of automatic lighting of the hazard lamp 2). If YES in Q10, the hazard lamp 2 is turned off in Q11.

  Although the embodiments have been described above, the present invention is not limited to the embodiments, and appropriate modifications can be made within the scope of the claims. You may make it perform the automatic lighting control of the hazard lamp 2 in all the vehicle speed areas during driving | running | working. The vehicle is not limited to a vehicle having all of the ABS control means 23, the brake assist control means 24, and the ESC control means 25, and may be a vehicle having any one or any two combinations. As the control means for changing the predetermined threshold G to a small value at the time of operation, any one or any two of the ABS control means 23, the brake assist control means 24, and the ESC control means 25 are used. There may be. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention provides a safety alert using automatic lighting of a hazard lamp, which is preferable for safety.

1: preceding vehicle 2: hazard lamp 3: following vehicle 10: drive circuit 21: controller 22: vehicle speed sensor 23: ABS control means 24: brake assist control means 25: ESC control means

Claims (1)

A control device for an emergency brake indicator light that automatically lights a hazard lamp when the vehicle suddenly decelerates,
Deceleration detection means for detecting the deceleration of the vehicle;
A lighting control means for turning on a hazard lamp when the deceleration detected by the deceleration detecting means exceeds a predetermined threshold;
ABS control means for preventing wheel locking ;
A threshold value changing means for changing the predetermined threshold value to be smaller when the ABS control means is operating than when it is not operating ;
An emergency braking indicator light control device comprising:

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