JPH0747879A - Rear end collision preventing system - Google Patents

Abstract

PURPOSE:To prevent a collision from behind at the time of running particularly at a high speed by mounting a deceleration display lamp, lighted when a running speed is decelerated, to the rear part of a vehicle of automobile, motorcycle, etc., so as to quickly predict a decelerating condition of a preceding vehicle. CONSTITUTION:A brake lamp 3 concurrently serving as a deceleration lamp is provided in the rear part of an automobile 1, to detect its speed by a control circuit, and in the case of detecting going into a decelerating condition even a little from the present, the brake lamp 3 is controlled so as to be lighted. That is, in the case of transfer to the decelerating condition even a little by operation except operating a brake pedal such as, for instance, when detached a foot from an accelerator pedal, this decelerating condition is displayed to a driver of the following vehicle by lighting the lamp, so as to inform the driver of the following vehicle of action till its transfer to braking, and a collision from behind is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear-end collision prevention system for automobiles and motorcycles.

[0002]

2. Description of the Related Art As a rear-end collision prevention device for an automobile, a brake lamp is mainly lit and other accessory lamps are generally attached.

[0003]

However, since the brake lamp only lights up red when the brake is applied,
There are the following problems.

A. Since there are individual differences in braking operation, it may not be possible to make the brakes depending on the speed and the distance between vehicles if the brakes are applied after checking the brake lights of the vehicle ahead.

B. When driving a car, predict the danger ahead, take your foot off the accelerator pedal for other reasons,
You may be seeing the situation before you release the accelerator and start braking. Since such a state of the preceding vehicle is often unknown to the succeeding vehicle, the timing of shifting to the braking of the following vehicle may be delayed especially on an expressway. These things run the risk of a rear-end collision.

[0006] An object of the present invention is to provide a system for preventing a rear-end collision accident by allowing the following vehicle to know the operation especially before shifting to the braking by a lamp display.

[0007]

The rear-end collision prevention system according to the present invention is as follows.

A rear-end collision prevention system in which a deceleration display lamp is attached to the rear of an automobile or a motorcycle to light up when the traveling speed is reduced.

The deceleration indicator lamp may be shared with the brake lamp. Also, when the speed enters the deceleration state without stepping on the brake, the deceleration indicator lamp blinks, and when the brake is stepped on, a control circuit is provided to switch to the lighting state, so that the deceleration state and the actual braking can be changed. It may be configured to be distinguishable.

[0010]

[Function] As long as the driver is accelerating or equilibrating by depressing the accelerator pedal while driving, the deceleration lamp does not light.

Next, when the driver releases the accelerator pedal and the speed is reduced from 85 km / h running to 85 km / h by natural deceleration, the deceleration lamp is turned on. By visually recognizing this light, it is possible to judge that there is a possibility that the following vehicle may brake, and as a result, caution, that is, the driver is ready to step on the brake pedal.

Next, when the brake pedal is depressed, the brake lamp is lit in any case.

From the above lamp display, unless the brake lamp is lit up until now, it is not known whether or not the vehicle in front is in a braking posture, and braking is performed only by the visual sense of speed and behavior of the vehicle in front. Compared with the conventional example in which the timing of braking is predicted, the specific behavior can be surely understood, so that an accident of a rear-end collision with a delayed timing of braking can be prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes an automobile, 2 denotes a brake lamp also serving as a deceleration lamp, and 3 denotes a control circuit.
When the speed is detected and the vehicle enters a deceleration state even a little from the current state, the brake lamp 3 is turned on.

In the embodiment, the speed is input from the speedometer 4 to the control circuit 2.

[0016]

As described above, the present invention has the following effects because the driver of the succeeding vehicle can recognize it by decelerating the vehicle even if the vehicle is decelerated by a small amount in addition to the operation of the brake pedal.

A. If there is time until the accelerator pedal is released and the brake pedal is depressed, the following driver can predict the possibility of braking as long as the vehicle decelerates within this time. As a result, the timing of braking is not delayed and a rear-end collision does not occur.

B. The lamp lights up when the vehicle decelerates from the equilibrium speed even a little, so that the following driver can see that the driver in front of the vehicle predicts the danger and takes his foot off the accelerator pedal, or is watching the situation. As a result, it is particularly effective in preventing a rear-end collision during high-speed traveling.

[Brief description of drawings]

FIG. 1 is a front view showing a rear portion of an automobile equipped with a system of the present invention.

FIG. 2 is an explanatory diagram of a system.

[Explanation of symbols]

 1 Car 2 Control circuit 3 Brake lamp 4 Speedometer

Claims (3)

[Claims] 1. A rear-end collision prevention system comprising a deceleration indicator lamp which is lit at the rear of an automobile or a motorcycle when the traveling speed is reduced. 2. The rear-end collision prevention system according to claim 1, wherein the deceleration indicating lamp and the brake lamp are shared. 3. The control circuit according to claim 1 or 2, further comprising a control circuit which flashes a deceleration indicator lamp when the speed enters a decelerating state without stepping on the brake and shifts to a lighting state when the brake is stepped on. Rear-end collision prevention system.