KR19990020673A - Spur weight variable system of automobile - Google Patents

Abstract

The present invention relates to a suspension system of a vehicle, in particular a sprung weight variable system to be able to vary the weight of the sprue of the vehicle.

An object of the present invention is to provide a variable vehicle sprung weight variable system to improve the riding comfort of the vehicle during straight driving by varying the weight of the upper suspension spring of the vehicle, and to improve the turning performance of the vehicle during turning. do.

According to an aspect of the present invention, there is provided a suspension system for an automobile, comprising: a turning check means for checking a turning state of the vehicle; a weight reciprocating in the shock absorber; a weight abstract movement means for vertically moving the weight; During the straight run, the weight abstraction movement means is operated to move the weight upward in the vehicle body direction, and when the turning check means instructs the vehicle to turn, the operation of the weight abstraction movement means stops the weight. Provided is a sprue weight variable system for a vehicle, comprising an electronic control unit for returning the weight downward.

Description

Spur weight variable system of automobile

The present invention relates to a suspension system of an automobile, and more particularly, to a sprung weight variable system that enables to vary the weight of the sprung of the vehicle.

An object of the present invention is to provide a variable weight of the sprue weight of the vehicle to be able to vary the weight of the top of the current gas spring of the vehicle to improve the ride comfort of the vehicle during the straight run, and to improve the turning performance of the vehicle during the turn. do.

In general, the weight of the vehicle can be divided into the weight of the engine, the body, the frame that is supported by the suspension of the vehicle, and the weight of the lower portion of the suspension.

The weight of the upper part supported by the suspension spring is called Sprung Weight (Sprung Weight), and the weight of the lower part of the spring is called Unsprung Weight (Unsprung Weight).

The reason why the weight of the vehicle is divided in this way is that the ride comfort of the vehicle, that is, the vibration absorbing ability of the suspension device, changes according to the weight of the upper portion (sprung weight) supported by the spring. The larger the weight, the greater the stiffness and the less the influence from vibration, resulting in better ride comfort.

On the other hand, when the vehicle turns, instead of improving the riding comfort, the effect of the centrifugal force is increased, so the turning characteristics are worse.

Therefore, if you can increase the vehicle's sprung weight while driving and reduce the sprung weight while turning (increase the unsprung weight), you can improve your riding comfort while driving and improve your turning performance while turning. There is a need.

However, the general vehicle has been designed to distribute the weight of the vehicle in consideration of the above two, but once designed, it has been considered that the sprue weight and the unsprung weight of such a vehicle cannot be changed.

The present invention intends to change the above-described conventional idea, and has a device that can change the spool weight through the hydraulic control around the shock absorber used in the suspension of the vehicle, and go straight when the vehicle is turning It is a technical object of the present invention to provide a variable vehicle sprung weight system for controlling the above-described devices by varying the driving time to secure ride comfort and turning stability of the vehicle.

1 is a view showing in detail the driving unit of the sprung weight variable system of a vehicle according to the present invention;

2 is a diagram illustrating a control system for controlling a sprung weight variable system of a vehicle according to the present invention.

Explanation of symbols on the main parts of the drawing

1: external appearance 2: weight

3: Upper oil pressure chamber 4: Lower oil pressure chamber

5: Pressure tube 6: Recovery tube

7: Strut bar 8: Suspension coil spring

9; turning confirmation means 10: electronic control device

11: Comparators 12, 13: Semiconductor switch

14: oil reservoir 15: pressure pump

16: drive motor 17: control valve

The present invention provides a vehicle suspension system as a means for solving the above-described technical problems, comprising: a turning check means for checking a turning state of the vehicle; A weight reciprocating in the shock absorber; Weight upward movement means for moving the weight up and down; During the straight driving, the weight upward movement means is operated to move the weight upward in the direction of the vehicle body, and when the turning confirmation means instructs the vehicle to turn, the operation of the weight upward movement means stops and the weight Provided is a sprue weight variable system for a vehicle, comprising an electronic control unit for returning the weight downward.

Preferably, the turning check means is provided with a sprue weight variable system of the vehicle, characterized in that the lateral acceleration detection sensor, or steering wheel sensor.

Further preferably, the weight abstraction moving means comprises: an upper hydraulic chamber and a lower hydraulic chamber formed with the weight interposed in the shock absorber; A pressure pump for supplying hydraulic pressure to the lower hydraulic chamber; A pressure tube connecting the pressure pump and the lower hydraulic chamber; A recovery tube for recovering the hydraulic oil of the upper hydraulic chamber; It provides a sprue weight variable system of the vehicle, characterized in that it comprises a control valve for controlling the hydraulic oil supply to the pressure tube or the hydraulic oil recovery from the pressure tube.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operating state of the sprung weight variable system of the vehicle according to the present invention.

1 is a view illustrating an operating part of a sprung weight variable system of a vehicle according to the present invention, in which a weight 2 is installed around a strut bar 7 of a shock absorber, which is a main component of a suspension device of a vehicle, and the upper and lower weights thereof are installed. It is provided with a shandong movement means which can control the spool weight to increase or decrease by the moving method.

Normally, the upward movement of the Shanghai movement means should be forced from the outside, but since the downward movement is returned by the natural force, only the upward movement means needs to be provided.

As described above, the weight abstraction movement means includes a weight (2) inside the outer cylinder (1), an upper hydraulic chamber (3) and a lower hydraulic chamber (4) formed up and down by the weight. And a pressurized tube 5 to the lower hydraulic chamber shown in FIG. 1 as a mechanism for supplying hydraulic pressure to the lower hydraulic chamber, and a recovery tube 6 for recovering hydraulic oil from the upper hydraulic chamber to the oil reservoir.

At this time, the external forcing force for the upward movement of the weight is made by the pressure pump 15 shown in Figure 2 and the downward movement is made automatically through the process of recovering the hydraulic oil of the lower hydraulic chamber to the oil reservoir (14).

On the other hand, when the hydraulic oil is collected by using the control valve 17, the operating oil can be supplied to the lower hydraulic chamber when the supply is carried out, and when the hydraulic oil is recovered, the control valve 17 can be switched on and off in order to recover the hydraulic oil of the lower hydraulic chamber to the oil reservoir. Make sure

At this time, the control valve 17 is configured to change the flow path by using a needle valve, or consists of a solenoid valve installed in the recovery flow path to block the recovery passage when the oil is pressurized, and to block the pressurized passage when the recovery. Configure in the way.

Therefore, in the above-described configuration, it is sufficient to supply oil to the lower hydraulic chamber 4 using the pressure pump 15 of FIG. 2 to increase the sprue weight of the vehicle, and to reduce the sprue weight of the vehicle, It is naturally done by recovering hydraulic oil.

On the other hand, in the above-described configuration, the means using the hydraulic pressure is used, but not limited to using the hydraulic pressure, it is also possible to configure using pneumatic pressure.

At this time, the weight upward movement means is the upper pneumatic chamber and the lower pneumatic chamber provided in the housing with the weight interposed between, the air tank for supplying pneumatic to the lower pneumatic chamber, the pneumatic supply from the air tank or It is configured to include a control valve for discharging the air pressure of the lower pneumatic chamber to the atmosphere.

In such a case, it is not necessary to put a control air into the upper pneumatic chamber in particular, but it is sufficient if only the compressed air of the lower pneumatic chamber can be airtight and the pressure can be controlled.

FIG. 2 illustrates a case in which the hydraulic circuit is applied with reference to the control circuit for controlling the spool weight variable system of the vehicle according to FIG. 1 as an example.

As described above, the electronic controller 10 uses the motor 16, which is the power source of the oil pump 15, which generates the compressed oil, and the control valve 17, which controls the path of the hydraulic oil, as the control circuit. And semiconductor switches 12 and 13.

Further, as a sensor for feedback for control in the electronic control apparatus, a turning check means 9 for judging whether the current vehicle is traveling straight or turning is provided.

To check the turning status, if the lateral acceleration exceeds a certain level (for example, 0.4g) using the lateral acceleration sensor as the turning confirmation means, determine that it is turning, or use the steering wheel sensor as the turning confirmation means. It can be judged whether the rotation angle exceeds a certain level.

It looks at the operation of the sprue weight variable system of the vehicle as described above.

If the vehicle is running straight, the larger the sprung weight of the vehicle is suitable for improving the riding comfort, the pressure in the lower oil pressure chamber is increased to adjust the weight upward.

On the other hand, if it is determined that the vehicle is turning from the turning condition checking means, it is advantageous to reduce the sprung weight (larger to the unsprung weight) for the turning performance and the turning stability of the vehicle. Lower the weight to the lower part by gravity.

By providing a sprung weight variable system of a vehicle operating in the above-described configuration, it is possible to raise the sprung weight of the vehicle when driving in a straight line without losing the turning stability by returning to the original state during the turning. It is to improve the ride comfort of the vehicle.

Claims (6)

A suspension system of a vehicle, comprising: turning checking means for checking a turning state of a vehicle; A weight reciprocating in the absorber; Weight abstract movement means for vertically moving the weight; During the straight driving, the weight abstraction movement means is operated to move the weight upward in the vehicle body direction, and when the turning check means instructs the vehicle to turn, the operation of the weight abstraction movement means stops the weight. Spur weight variable system of a vehicle comprising an electronic control unit for returning the weight downward 2. The spool weight variable system of claim 1, wherein the turning check means is a lateral acceleration sensor. The sprung weight variable system of claim 2, wherein the electronic controller is an electronic controller that determines that the vehicle is turning when the output of the lateral acceleration sensor is 0.4g or more. 2. The sprung weight variable system of claim 1, wherein the turning check means is a steering wheel sensor. 2. The apparatus of claim 1, wherein the weight abstraction moving means comprises: an upper hydraulic chamber and a lower hydraulic chamber formed in the shock absorber with the weight interposed therebetween; A pressure pump for supplying hydraulic pressure to the lower hydraulic chamber; A pressure tube connecting the pressure pump and the lower hydraulic chamber; A recovery tube for recovering the hydraulic oil of the upper hydraulic chamber; Spur weight variable system of the vehicle, characterized in that it comprises a control valve for controlling the operating oil supply to the pressurized tube or the hydraulic oil recovery from the pressurized tube According to claim 1, wherein the weight upward movement means comprises an upper pneumatic chamber and a lower pneumatic chamber provided in the housing with the weight interposed therebetween; An air tank for supplying air pressure to the lower pneumatic chamber; Sprinkling weight variable system of the vehicle, characterized in that the weight upward movement means including a control valve for supplying air pressure from the air tank or discharge the air pressure of the lower pneumatic chamber to the atmosphere