JPH07251674A - Brake display device for vehicle - Google Patents

Abstract

PURPOSE:To make a driver of the following vehicle recognize a degree of deceleration of the self vehicle by lighting the second brake lamp when a car speed is decreased to prescribed ratio of that when started applying a brake. CONSTITUTION:When a brake pedal 8 is stepped on, a signal of closing the first switch 5 is fed by a brake sensor 10, to light ordinary brake lamps 2. An electronic control unit 11 continues reading a car speed, decreased in accordance with braking, from a signal of a car speed sensor 12, and in the case that this car speed is decreased to prescribed ratio of a car speed when started applying a brake, a signal of closing the second switch 6 is fed to light the second brake lamp 3. Accordingly, advancing into a braking condition first by lighting the ordinary brake lamps and considerably advancing deceleration by lighting the second brake lamp 3 can be respectively known to a driver of the following vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking display device for a vehicle, which is provided with a braking light which is lit in association with the operation of the braking device at the rear of the vehicle body.

[0002]

2. Description of the Related Art Such a brake display device is generally and widely used as a device for causing a driver of a following vehicle to recognize that a vehicle is being braked by constantly lighting a brake light during braking.

[0003]

In the conventional braking display device, it is possible to inform the driver of the following vehicle that the vehicle is being braked by turning on the brake light. You can't let us know the strength of.
If the driver of the following vehicle can recognize them, the driver will be able to perform braking and steering operations more accurately.

The present invention has been made in view of the above points, and an object thereof is to provide a braking display device which allows a driver of a succeeding vehicle to recognize the degree of deceleration of the vehicle and the strength of the braking during braking. And

[0005]

In order to achieve the above object, the present invention provides a second brake light at the rear end of a vehicle body, and the second brake light has a vehicle speed during braking at the start of braking. The first feature is that a control device that lights the brake light when the vehicle speed decreases to a predetermined rate is connected.

Further, according to the present invention, a second brake light is attached to the tail of the vehicle body, and when the brake hydraulic pressure becomes a predetermined value or more during the operation of the braking device, the second brake light is attached to the second brake light. The second feature is that a control device for lighting is connected.

Further, according to the present invention, a second brake light is attached to the rear end of the vehicle body, and the second brake light is turned on when the deceleration of the vehicle body exceeds a predetermined value during braking. The third feature is that a control device is connected.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

First, the first embodiment shown in FIGS. 1 and 2 will be described. As shown in FIG. 1, a pair of normal left and right brake lights 2 and 2 defined by law are attached to the lower part and a second brake light 3 is attached to the upper part at the rear of the body of an automobile.

As shown in FIG. 2, the ordinary brake lights 2, 2 and the second brake light 3 are connected to the battery 4 in parallel with each other, and energization common to all the brake lights 2, 2, 3 is carried out. A first switch 5 is provided in the circuit, and a second switch 6 is provided in an energizing circuit dedicated to the second brake light 3.

As is well known in the art, the braking system 7 for an automobile has a brake pedal 8, a brake master cylinder 9 that is actuated by depression of the brake pedal 8 to raise the pressure in the hydraulic chamber 9a, and the hydraulic pressure generated in the hydraulic chamber 9a. A brake (not shown), which is actuated in response to the operation, is provided behind the brake pedal 8. A brake sensor 10 is installed behind the brake pedal 8 to detect the stepping operation of the brake pedal 8, that is, the operation of the braking device 7.

The first switch 5 is adapted to be closed by a signal generated when the brake sensor 10 detects the depression of the brake pedal 8.

The second switch 6 is controlled by an electronic control unit 11, and this electronic control unit 11 is
Upon receiving signals from the brake sensor 10 and a vehicle speed sensor 12 that detects the vehicle speed, when the vehicle speed decreases to a predetermined rate of the vehicle speed at the start of braking, for example, 50%, a signal for closing the second switch 6 is issued. ing.

In the above, the second switch 6, the electronic control unit 11, the brake sensor 10 and the vehicle speed sensor 12
Constitutes a control device 13 for the second brake light 3.

Next, the operation of this embodiment will be described. When the driver depresses the brake pedal 8 while the vehicle is traveling, the brake master cylinder 9 operates and its output hydraulic pressure is transmitted to each wheel brake to operate it. At this time, the brake sensor 10 first detects the depression of the brake pedal 8 and sends a closing signal to the first switch 5, so that the first switch 5 is immediately closed to turn on the normal brake lights 2 and 2.

The signal of the brake sensor 10 is also sent to the electronic control unit 11, which reads the vehicle speed at that time, that is, the vehicle speed at the start of braking from the output signal of the vehicle speed sensor 12 and multiplies it by a predetermined ratio. The set speed is set as the reference vehicle speed. For example, the braking start vehicle speed is 100 km / h
If the predetermined ratio is 50%, the standard vehicle speed is 50 km / h
Becomes

Then, the electronic control unit 11 continues to read the vehicle speed that decreases with braking from the signal of the vehicle speed sensor 12, and when it becomes less than the reference vehicle speed, that is, less than 50 km / h, the second switch 6 is closed. The second brake light 3 is turned on because it is sent and closed.

Therefore, the driver of the succeeding vehicle is informed that the vehicle is in the braking state by the normal lighting of the brake light 2, and the deceleration of the own vehicle is considerably advanced by lighting the second brake light 6. It is possible to let the driver of the following vehicle recognize that he is leaving.

When the pedal effort is released from the brake pedal 8 to release the braking, the brake pedal 8 returns to the rest position by the elastic force of the return spring.
Is detected, the first switch 5 opens and all the brake lights 2,
2 and 3 are turned off.

FIG. 3 and FIG. 4 show a second embodiment of the present invention, in which a plurality of second braking lights 3 are arranged in a row.
3b and 3c, the lamps are connected in parallel to each other to the battery 4, and during braking, as the vehicle speed decreases to, for example, 70%, 50% or 30% of the braking start vehicle speed, a plurality of second switches 6a, 6b, 6c are sequentially closed, and the lamps 3a, 3b,
3c is sequentially turned on. Since other configurations are similar to those of the previous embodiment, the portions corresponding to those of the previous embodiment are designated by the same reference numerals.

According to this embodiment, the driver of the following vehicle can accurately recognize the speed change of the own vehicle due to braking.

FIG. 5 shows a third embodiment of the present invention.
The brake master cylinder 9 is provided with a pressure sensor 14 for detecting that the hydraulic pressure in the hydraulic chamber 9a has risen to a predetermined value higher than that under normal conditions, and the signal from the pressure sensor 14 closes the second switch 6. It is the one.
Thus, the second switch 6 and the pressure sensor 14 form a control device 23 for the second brake light 3. The rest of the configuration is the same as that of the first embodiment, and in the figure, parts corresponding to the first embodiment are assigned the same reference numerals.

According to this embodiment, when the pedaling force applied to the brake pedal 8 becomes stronger than usual, the second brake light 3 is lit after the normal brake light 2 to confirm that the strong braking state has been entered. It can be recognized by the driver of the following vehicle.

FIG. 6 shows a fourth embodiment of the present invention.
A deceleration sensor 15 for detecting a deceleration of a predetermined value or more is installed at an appropriate place on the vehicle body 1, and the second switch 6 is closed by a signal from the deceleration sensor 15. Thus, the second switch 6 and the deceleration sensor 14 form a control device 33 for the second brake light 3. The other structure is the same as that of the above-mentioned third embodiment.
The same reference numerals are given.

According to this embodiment, when a large deceleration exceeding a predetermined value occurs in the vehicle due to sudden braking, the normal braking light 2
After that, the second brake light 3 is turned on, so that the driver of the following vehicle can recognize the sudden braking state of the vehicle.

In addition to the above-mentioned automobile, the present invention is
Of course, it can also be applied to motorcycles.

[0027]

As described above, according to the first feature of the present invention, the second brake light is attached to the rear end of the vehicle body, and the second brake light is used when the vehicle speed during braking starts. Since the control device for turning on the brake light when the vehicle speed drops to a predetermined rate is connected, the driver of the following vehicle can recognize the deceleration degree of the own vehicle by turning on the second brake light during braking.

According to the second feature of the present invention, a second brake light is attached to the rear of the vehicle body, and the second brake light has a braking hydraulic pressure equal to or higher than a predetermined value during operation of the braking device. When
Since the control device for turning on the brake light is connected, the driver of the following vehicle can recognize the forced operation state of the own vehicle by turning on the second brake light during braking.

According to the third feature of the present invention, a second brake light is attached to the rear of the vehicle body, and the deceleration of the vehicle body becomes a predetermined value or more during braking by the second brake light. Since the control device for turning on the brake light is connected at this time, the driver of the following vehicle can recognize the sudden braking state of the own vehicle by turning on the second brake light during braking.

[Brief description of drawings]

FIG. 1 is a rear view of an automobile including a braking display device according to a first embodiment of the present invention.

FIG. 2 is an electric circuit diagram of the braking display device of FIG.

FIG. 3 is a rear view of an automobile including a braking display device according to a second embodiment of the present invention.

FIG. 4 is an electric circuit diagram of the braking display device of FIG.

FIG. 5 is an electric circuit diagram of a braking display device according to a third embodiment of the present invention.

FIG. 6 is an electric circuit diagram of a braking display device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1 vehicle body 2 normal braking light 3 second braking light 7 braking device 13, 23, 33 control device

Claims (3)

[Claims] 1. A braking display device for a vehicle, comprising a braking light (2) which is lit in association with the operation of a braking device (7) at the rear of the vehicle body (1), wherein a second vehicle is provided at the rear of the vehicle body (1). A control device (1) which is provided with the brake light (3), and turns on the second brake light (3) when the vehicle speed during braking decreases to a predetermined rate of the vehicle speed at the start of braking. 13) A braking display device for a vehicle, characterized in that the braking display device is connected. 2. A braking display device for a vehicle, comprising a braking light (2) which lights up in association with the operation of a braking device (7) at the rear of the vehicle body (1), wherein The second brake light (3) is attached to the second brake light (3) and the brake light (3) is turned on when the braking hydraulic pressure becomes a predetermined value or more during the operation of the braking device (7). A control device (23) is connected,
Vehicle braking display. 3. A braking display device for a vehicle, comprising a braking light (2) which is lit in conjunction with the operation of a braking device (7) at the rear of the vehicle body (1), wherein a second vehicle is provided at the rear of the vehicle body (1). A control device for attaching a brake light (3) to the second brake light (3) and turning on the brake light (3) when the deceleration of the vehicle body (1) reaches a predetermined value or more during braking. A braking display device for a vehicle, characterized in that (33) is connected.