KR100747249B1 - Coupled torsion beam axle suspension of an automobile - Google Patents

Abstract

A Coupled Torsion Beam Axle Suspension of a vehicle is provided to change a tow property and a roll center by automatically changing the position of a torsion beam axle according to driving conditions such as the rotation or the bump of a vehicle. A central process unit is connected to a steering angle sensor, a vehicle speed sensor, and a roll sensor. The steering angle sensor detects a steering angle of a vehicle. The vehicle speed sensor detects the speed of the vehicle. The roll sensor detects a roll center. A reversible motor(400) is a linear motor to provide great driving force and accurate position control with less power consumption. A guide hole(210) passes through to a position corresponding to the range of 0.25 to 0.5 on the assumption that the total length of a trailing arm(200) is 1, and a distance between the front end of the trailing arm(200) and the center of a torsion beam axle is represented as a ratio.

Description

Coupled Torsion Beam Axle Suspension of an Automobile}

1 is a perspective view showing a coupled torsion beam axle suspension of a typical vehicle

2 is a front view showing a state where a conventional torsion beam axle is coupled to a trailing arm;

Figure 3 is a perspective view showing a state in which the torsion beam axle of the present invention is coupled to the trailing arm

4 is a side view showing a state in which the torsion beam axle of the present invention is coupled to a trailing arm;

5 is a block diagram showing the operating state of the inventors coupled torsion beam axle suspension

Explanation of symbols on the main parts of the drawings

100: torsion beam axle 110: coupling protrusion

200: trailing arm 210: guide ball

400: forward and reverse motor

 A: Steering angle sensor B: Vehicle speed sensor

 C: Roll Sensor D: Central Processing Unit

The present invention relates to a coupled torsion beam axle suspension of a vehicle. More specifically, the position of the torsion beam axle is varied according to the steering angle and the vehicle speed input to the central processing unit, so that the tow value is appropriate to the driving state of the vehicle. It relates to a coupled torsion beam axle suspension of a vehicle which is to be adjusted.

In general, the torsion beam type suspesion is also called a semi-rigid axle type. It is a trailing arm type suspension, which is a type of suspension in which a left and right trailing arm is connected to a cross beam. Therefore, there are axle beam type, pivot beam type and coupled beam type, and they are widely used in the rear wheels of small FF cars.

Since the arm is connected to the left and right, the beam is twisted according to the rolling of the vehicle body, which brings about the effect of the stabilizer.

In addition, a torsion beam type axle is often used in combination with a spindle, which refers to a short axis such as a main shaft of a machine tool or a part where a hub is installed to install an automobile front wheel.

In another configuration, the coupled torsion beam axle suspension is also referred to as 'Coppel-Lankel-Axe' as an intermediate being between the axle beam and the pivot beam.

This method combines the advantages of both because the movement at the time of bound is the same as the full trailing type, but the semi-trailing trajectory is taken on the roll type.

As shown in FIG. 1, the coupled torsion beam axle suspension is provided with a torsion beam axle 100 disposed transversely on the bottom of the vehicle, and both left and right sides of the torsion beam axle 100. It consists of a pair of trailing arm 200 respectively provided in the trailing arm 200, and trailing arm bush 300 is provided in front of the trailing arm (200).

However, the conventional coupled torsion beam type axle suspension has a total length of the trailing arm 200 as shown in FIG. 2, and is extended from the front end of the trailing arm 200 to the center of the torsion beam axle 100. When the distance is expressed as a ratio, the torsion beam axle 100 is fixedly welded at 0.35 with the torsion arm 200 positioned on the trailing arm 200. In the event of a turn, etc., the response is not actively made according to the driving state of the vehicle.

Therefore, when cornering is performed while the vehicle is in operation, a toe-out characteristic appears due to bumps or rebounds of tires, and an oversteer appears, thereby preventing the vehicle from stabilizing.

Of course, conventionally, the trailing arm bush 300 is used to induce the tow-in as much as possible in order to solve the conventional problems as described above, but this is also a bump rebound and a full turn while driving the vehicle. When a back occurs, the vehicle is not actively responded to, depending on the driving state of the vehicle, of course, when too much toe-in has a problem in that the steering force is increased and the driver who operates the vehicle has difficulty in steering.

An object of the present invention is to solve the problem as described above, when the total length of the trailing arm is 1 and the distance from the front end of the trailing arm to the center of the torsion beam axle is 0.25 to 0.25. The torsion beam axle is moved to the trailing arm according to the driving state of the vehicle to the 0.5 position, and the tow characteristic is changed according to the driving state of the vehicle. It is to provide a coupled torsion beam axle suspension of a vehicle to improve the adjustment stability of the vehicle at the same time.

The object of the present invention is a torsion beam axle 100 which is provided in the transverse direction on the bottom of the vehicle, a pair of trailing arms 200 which are respectively provided on the left and right sides of the torsion beam axle 100, and the trail Comprising a trailing arm bush installed in front of the ring arm 200, the trailing arm 200 has a total length of the trailing arm 200 to 1 and the torsion beam at the front end of the trailing arm When the distance to the center of the axle is expressed as a ratio, the guide hole 210 is formed to penetrate to 0.25 to 0.5 position, and the guide hole 210 slides to one side and the other side by the driving force of the stationary motor 400. The engaging projection 110 is formed to protrude outward on the left and right sides of the torsion beam axle 100, respectively, and the stationary motor 400 is to determine the proper position of the torsion beam axle 100 according to the driving state of the vehicle. Central Processing Unit (D) It is achieved by the operation in forward and reverse directions according to the signal of.

Meanwhile, the central processing unit (D) is connected to a steering angle sensor (A) for detecting a steering angle, a vehicle speed sensor (B) for detecting a vehicle speed, and a roll sensor (C) for detecting a roll center, respectively, and the central processing unit ( When the state of driving the vehicle at D) is sensed by each of the sensors A, B, and C and is input to the central processing unit D, the central processing unit D is the respective sensors A, B, and C. Calculate the proper position of the torsion beam axle 100 according to the value sensed by) or send a signal to the stationary motor 400 according to the mapped information, and the stationary motor 400 is generated in the central processing unit (D). It turns out that the position of the torsion beam axle 100 is moved while operating in one direction and the other direction according to the received signal.

In addition, the stationary motor 400 is most preferably to apply a linear motor capable of high driving force and accurate position control while low power consumption.

Hereinafter, the technical configuration of the present invention with reference to the accompanying drawings in detail as follows.

Figure 3 is a perspective view showing a state in which the torsion beam axle of the present invention is coupled to the trailing arm

4 is a side view showing a state in which a torsion beam axle of the present invention is coupled to a trailing arm, and FIG. 5 is a block diagram showing an operating state of a coupled torsion beam axle suspension of the present invention.

Coupled torsion beam axle suspension of the vehicle of the present invention, as shown in Figures 3, 4 and 5, so as to protrude outward on both the left and right sides of the torsion beam axle 100 is installed in the transverse direction on the bottom of the vehicle. Each coupling protrusion 110 is formed, and the coupling protrusion 110 is formed in the tracking arm 200 by a guide hole 210 to be movable to one side and the other side by the driving force of the stationary motor 400. It is.

Of course, when the guide hole 210 represents the total length of the trailing arm 200 as 1 and the distance from the front end of the trailing arm 200 to the center of the torsion beam axle 100 is 0.25, Only up to 0.5 position is formed.

On the other hand, the stationary motor 400 is operated in one direction and the other direction according to the signal generated from the central processing unit (D) to change the position of the torsion beam axle (100), the steering angle in the central processing unit (D) Steering angle sensor (A) for detecting the vehicle speed sensor (B) for detecting the vehicle speed and the roll sensor (C) for detecting the roll center are connected, respectively, the state when driving the vehicle to the central processing unit (D) When detected by each sensor (A, B, C) and input to the central processing unit (D), the central processing unit (D) is a torsion beam according to the value detected by each sensor (A, B, C) The proper position of the axle 100 is calculated or a signal is transmitted to the stationary motor 400 according to the mapped information.

When the coupled torsion beam axle suspension of the vehicle of the present invention configured as described above performs a turning or the like while driving the vehicle, the steering angle, the vehicle speed sensor (B), and the roll sensor (C) are used for steering angle, vehicle speed, and roll center. Values are respectively detected, the steering angle, the vehicle speed and the roll center value detected by the steering angle sensor (A), the vehicle speed sensor (B) and the roll sensor (C) are input to the central processing unit (D), the central processing unit (D) calculates the optimal position of the torsion beam axle 100 when turning the vehicle by using the information or the operation mapped thereto.

After the central processing unit (D) calculates the optimal position of the torsion beam axle (100) suitable for the driving state, the signal is transferred to the stationary motor (400) to be driven in one side and the other direction, and the stationary motor ( As the coupling protrusion 110 of the torsion beam axle 100 is guided along the guide hole 210 formed in the trailing arm 200 in the direction in which the 400 is driven, the coupling protrusion 110 is moved in one side and the other direction. The torsion beam axle 100 is moved by the amount by which the 110 is moved.

At this time, when the position of the torsion beam axle 100 changes from 0.25 to 0.5, the height of the roll center is increased by about 50 mm.

That is, when the position of the torsion beam axle 100 is moved to 0.5 at the time of turning, the roll center increases with the toe-in effect, so as to be closer to the center of gravity of the vehicle, and the movement of the vehicle is reduced, thereby increasing turning stability.

In addition, the steering angle sensor (A), the vehicle speed sensor (B) and the roll sensor (C) detects the steering angle, the vehicle speed and the roll center value, respectively, during the straight running, and the steering angle sensor (A) and the vehicle speed sensor (B) and The steering angle, vehicle speed, and roll center value detected by the roll sensor C are input to the central processing unit D, and the central processing unit D is optimal torsion when the vehicle is turned by the mapped information or calculation. After calculating the position of the beam axle 100 and driving the stationary motor 400, the position of the torsion beam axle 100 is moved from 0.5 to 0.25 direction, thereby lowering the roll center with the toe-out and ensuring the straight stability. To lose.

Thus this invention is the turning of the vehicle. By changing the position of the torsion beam axle automatically according to the driving conditions such as bumps and the like, the characteristics of the roll center and the tow are changed, which improves the driving stability of the vehicle and reduces the steering force of the steering wheel and the steering stability. The adjustment stability of the driver is improved, as well as to improve the riding comfort of the occupant in the cabin is very useful invention.

Claims (4)

The torsion beam axle 100 which is installed in the transverse direction on the bottom of the vehicle, a pair of trailing arms 200 which are respectively provided on the left and right sides of the torsion beam axle 100, and the front of the trailing arm 200 In the configuration consisting of a trailing arm bush installed in, the trailing arm 200 is formed so that the guide hole 210 penetrates, the guide hole 210 by the driving force of the stationary motor 400 on one side And a coupling protrusion 110 to be slidably moved to the other side so as to protrude outwardly on both the left and right sides of the torsion beam axle 100, and the stationary motor 400 is torsion beam axle 100 according to the driving state of the vehicle. Coupled torsion beam axle suspension of a vehicle, characterized in that the operation is performed in the forward and reverse directions according to the signal of the central processing unit (D) for calculating the proper position. The method according to claim 1, wherein the central processing unit (D) is connected to the steering angle sensor (A) for detecting the steering angle, the vehicle speed sensor (B) for detecting the vehicle speed and the roll sensor (C) for detecting the roll center, respectively. Coupled torsion beam axle suspension of a car. The coupled torsion beam axle suspension according to claim 1, wherein the stationary motor 400 is a linear motor capable of high driving force and accurate position control with low power consumption. The method of claim 1, wherein the guide hole 210 is the length of the trailing arm 200 is 1, when the ratio from the front end of the trailing arm to the center of the torsion beam axle as a ratio, up to 0.25 to 0.5 position Coupled torsion beam axle suspension of a vehicle, characterized in that it is formed through.

Images