JPH01218935A - Head lamp driving method for automobile - Google Patents

Abstract

PURPOSE:To drive a head lamp following an advancing direction by constituting a device actuating a wheel by a handle control while detecting the wheel for its steering direction and angle and turning the head lamp by a predetermined angle being based on the detected turning angle data. CONSTITUTION:When a turning angle data of effect with a wheel steered angle 0 in a predetermined direction is input from an angle detecting sensor 1 to a CPU3 in its arithmetic processing part, the data is processed to be compared one after another with a head lamp driving control data in a memory 2, and a driving time control data of turning reference angle data agreeing with the turning angle data is output to a driving time converter circuit 4. While when a turning angle data of effect smaller than the preceding input turning angle data is input, a driving time control data in a reverse direction is output. The driving time converter circuit 4, when it inputs the driving time control data from the CPU3, allows an electric current to flow in a driving means 5 only for the electrification time band in accordance with a content of the control data, and the driving means 5 is actuated only for the electrification time band, turning a head lamp in a car body by a predetermined angle in a horizontal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for driving a headlamp in a motor vehicle.

Conventional technology Conventionally, automobile headlamps are fixed to the vehicle body.

Therefore, when turning right or left at an intersection, etc. at night, the beam light irradiation direction (
P) is in the straight direction of the vehicle (C), that is, the same direction as the tangential direction of the curve in the own lane.

Problems to be Solved by the Invention From this point of view, the area (A) other than the straight direction of the automobile (C)
), the beam light (P) is not irradiated, and therefore, at intersections, pedestrians crossing the road from the area (A) side may be slow to be detected, and in mountainous areas with many sharp curves, the curves may be difficult to detect. There was a problem in that it was difficult to understand, making it impossible to ensure safe driving.

The present invention has been made in view of the above-mentioned problems, and provides a method for driving a headlamp of an automobile in which the headlamp is driven to follow the direction of movement of the automobile so as to enable safe driving. The purpose is to

Means for Solving the Problems According to the present invention, the above-mentioned problems can be solved by detecting the steering direction and steering angle of the wheels operated by the steering wheel operation of the steering device, and adjusting the steering direction and steering angle of the wheels based on the detected turning angle data. This is achieved by a method for driving an automobile headlamp, which comprises operating a driving means for horizontally rotating the lamp by a predetermined angle.

Operation: By operating the handle of the steering device, the steering direction of the wheels and the color of the steering wheel are detected, and the headlamp driving means is operated based on the detected turning angle data.

This causes the headlamp to rotate by a predetermined angle in the horizontal direction in the direction of rotation of the handle.

Example The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 shows a block diagram for implementing a method for driving a headlamp of an automobile according to the present invention.

In FIG. 1, reference numeral (1) is an angle detection sensor that detects the steering direction of the wheels and the color of the steering wheel operated by the vehicle's tear-off device. The angle detection sensor (1) is composed of, for example, an optical sensor, and is attached to the steering shaft or tie rod of the steering device at the position before turning the steering wheel, that is, at the position where the wheel's steering angle is 0 degrees. The barcode data is read and the read information is transferred to a microprocessor or microcomputer (3) (hereinafter referred to as CPU).
). The barcode data has data content that indicates the turning direction of the handle as well as the turning color of the wheel. For example, when the paddle is turned clockwise by a predetermined angle from the above-mentioned position, the wheel will turn clockwise and in that state. The turning angle data of the steering angle is read by the angle detection sensor (1), and conversely, when the /X handle is turned counterclockwise by a predetermined angle from the above-mentioned position, the steering angle of the wheels in the left direction and in that state is determined. Turning angle data is read by an angle detection sensor (1).

(2) is a memory, and this memory (2) stores headlamp drive control data for controlling a headlamp drive means (5), which will be described later. This headlamp drive control data consists of turning reference angle data and drive time control data set based on this turning reference angle data. The turning reference angle data is set so that the steering angle gradually increases in the rightward and leftward directions starting from the steering angle of 0 degrees within the steering angle permissible range of the wheels. The time control data is set so that the driving time becomes longer as the steering angle of the turning reference angle data becomes larger. Note that the stepwise setting of the steering angle in the turning reference angle data does not make much of a difference in the effect obtained even if the headlamp is driven in too many subdivisions. It is sufficient to set the degree. The memory (2) sequentially outputs headlamp drive control data to the CPU (3) in response to an output command signal from the CPU (3).

The CPU (3) includes an arithmetic processing section and a control section. When turning angle data indicating that the steering angle of the wheels is 0 in a predetermined direction is input from the angle detection sensor (1) to the arithmetic processing section, the arithmetic processing section receives the turning angle data and the information stored in the memory (2). A successive comparison process is performed on the headlamp drive control data, and as a result, the drive time control data of the turning reference angle data that matches the turning angle data is outputted from the control section to the drive time conversion circuit (4). In addition, the CPU (3
), the angle detection sensor (
1), the driving time control data in the turning reference angle data in the opposite direction to the turning reference angle data matched by the comparison process is outputted to the driving time conversion circuit (4). In addition, if the turning angle data input earlier is the first stage, the turning angle data of the previous stage will be set to 0 when the wheel steering color is 0.
This is the turning angle data for the position.

When drive time control data is input from the CPU (3), the drive time conversion circuit (4) causes current to flow through the drive means (5) only during a time period corresponding to the content of this data.

The drive means (5) is constituted by, for example, a reversible motor capable of forward and reverse rotation. And drive time conversion circuit (4
), each headlamp rotatably supported on the vehicle body is rotated by a predetermined angle in the water direction.

Next, the procedure of a method for driving a headlamp of an automobile will be explained based on FIG.

First, when the steering wheel is turned in a predetermined direction from a state where the degree of color failure of the wheel is 0 degrees (step 1), the turning angle data of the barcode data read by the angle detection sensor (1) is input (step 2). ). The CPU (3) determines drive time control data of turning reference angle data that matches the turning angle data from the headlamp drive control data and (
Step 3), this drive time control data is output to the drive time conversion circuit (4) (Step 4). As a result, the drive means (5) operates only during the time period specified by the drive time control data (Step 5), and the headlamp rotates in the direction in which the handle is turned by the turning reference angle data (Step 6).
).

Next, when the steering wheel is returned (step 7), turning angle data indicating that the degree of rudder failure is smaller than the previously manually input turning angle data is input from the angle detection sensor (1) (step 8). As a result, the CPU (3) converts the drive time control data of the turning reference angle data that matched through the comparison process and the turning reference angle data in the opposite direction to the drive time conversion circuit (4).
), and (step 9), the driving means (5) operates only during the time period of the driving time control data (step 1).
0), the headlamp returns to its original position, that is, the position where the wheel steering angle is 0 degrees (step 11).

Note that the method according to the above embodiment can be used appropriately by turning on and off a changeover switch provided inside the vehicle.

Effects of the Invention As described above, according to the present invention, the steering direction and the color of the steering wheel operated by the handle operation of the steering device are detected, and the headlamp is adjusted horizontally based on the detected turning angle data. Since the driving means for rotating the vehicle by a predetermined angle operates, the headlamp follows the direction of travel of the vehicle and rotates by a predetermined angle in the horizontal direction. In addition, in mountainous areas where there are many sharp curves, the curves can be clearly seen and safe driving can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a block diagram for implementing the method for driving a headlamp of an automobile according to the present invention, FIG. 2 is a flowchart showing the procedure of the method, and FIG. 3 is for explaining the problems of the prior art. FIG. Figure 1

Claims (1)

[Scope of Claims] [1] Detecting the steering direction and steering angle of the wheels operated by the handle operation of the steering device, and rotating the headlamp by a predetermined angle in the horizontal direction based on the detected turning angle data. A method for driving a headlamp of an automobile, comprising operating a driving means for driving a headlamp.