KR880002344B1 - Oil pressure suspension device for a vehicle - Google Patents

Abstract

This invention is an automobile suspension system which consists of four hydraulic cylinders, four solenoid valves, four limit switches and a sensing device. The hydraulic cylinders installed and each wheel is connected to the installed four valves respectively in the sensing device. A pendulum hung in the center of the sensing device keeps in touch with each valves in a horizontal plane on its surface symmetrically. The pendulum is fixed on the cover of the sensing device by use of a rod bearing and a pint. The pendulum moves freely in accordence with the inertia of the car by centrifugal force in the event of ill-balanced turning and by vibration and inpact caused by the road surface.

Description

Automobile hydraulic suspension

1 (a) is a hydraulic circuit diagram according to the present invention, 1 (b) is a working state diagram showing the hydraulic flow according to the present invention.

2 is a block diagram of the control of the present invention.

3 is a partial cutaway perspective view of a sensing device for balance using a pendulum of the invention.

4 is a plan sectional view of the main part of FIG.

5 is a main cross-sectional view of FIG.

FIG. 6 (a) is another embodiment in which the apparatus according to the present invention is installed between the vehicle body and the wheel shaft, and in FIG. 6 (b) and FIG. 6 (c).

7 (a) and 7 (b) is an operation of the uapp cylinder according to the position change of the pendulum according to the present invention.

8 (a), 8 (b) and 8 (c) are views showing the action of the change of the vehicle according to the direction of inertia according to the present invention.

* Explanation of symbols for main parts of the drawings

1: sensing device 2: circular groove

3: pendulum 4: loading

5 pin 6 upper cover

7: body 8: euro

9: Valve 9 ": Euro groove

10: detection rod 11: dog

12: spring 13: screw

14: lot bearing 15: coupling groove

16: Lower cover L ₁ , L ₂ , L ₃ , L ₄ : Limit switch

C ₁ , C ₂ , C ₃ , C ₄ : Solenoid valve S ₁ , S ₂ , S ₃ , S ₄ : Cylinder

P, P ': Pump T: Tank

The present invention relates to a vehicle suspension device that can be compensated for the imbalance of the vehicle body by controlling the wheels by means of a pendulum against the imbalance of the vehicle body generated by the inertial force and the centrifugal force inclined surface generated while driving the vehicle. The suspension system transmits the driving force and braking force of the wheels to the frame while driving the vehicle, and overcomes the worm core force and inertia when turning, ensuring that the wheels are in the correct position with respect to the vehicle body, and at the same time absorbing the impact of the road surface. The ride is good. The driving and the effects on various vehicles have been developed by making efforts to cushion and stop the vehicle, such as stop and start, curvature and slope of the ground, inertia, centrifugal force, and speed and vibration. However, conventionally, in order to absorb the vibrations and shocks generated in the curvature of the ground, the plate-shaped spring and the air-over bellows in the coil spring, etc. are fragmented to alleviate the shock applied to the installation vehicle body.

In the conventional suspension system, a plate-shaped spring, a coil spring, a deep over-the-air air bellows, etc. are installed between the vehicle body and the wheel shaft to attenuate the impact between the vehicle body and the wheel shaft against impact caused by road curvature and obstacles. However, this has a limited buffering force against the surface curvature. Such a shock absorber is badly rolled and does not have a preservation ability against tilting or tilting due to inertia and centrifugal inclination, but rather is unbalanced due to the elasticity of the shock absorber when turning. Such a conventional suspension device is only a damping effect of the up and down shock and vibration, which is a fragmentary function, and cannot be operated in response to the inertia and centrifugal force or inclined surface necessary to form a suspension device that can give a comfortable ride.

The object of the present invention is to solve this deficiency of the prior art and at the same time install a hydraulic device between the vehicle body and the wheel axle by using the hydraulic device operated by the control device and the control of the detection device and parallel to the existing suspension device as necessary. By reducing the impact and vibration on the wheels so as not to reach the car body, the wheels are controlled and flexibly offset by the control device that detects the action of the force on the inclined surface or inertia and centrifugal force. By using a pendulum that can sense the imbalance and the centrifugal force during rotation, it acts to adjust the height and height of the car body by actively responding naturally to any shape of the road surface, impact and changes of the car body. In addition, the vehicle body is always balanced in various situations that occur during driving, so the ride is comfortable and the vehicle body is always balanced, so it is possible to reduce the accident of the car by driving in a stable posture even on road conditions and mechanical changes.

The effect of the configuration and operation that can achieve the object of the present invention in detail by the drawings as follows.

1 is a hydraulic circuit diagram according to the present invention, a hydraulic cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) between the respective wheel axle and the vehicle body, and corresponding to the solenoid valve, (C ₁ The hydraulic system is configured by installing the tank (1) and the pump (P) (P ") at the same time as installing the (C ₂ ) (C ₃ ) (C ₄ ) and the hydraulic cylinders (S ₁ ) (S ₂ ). (S ₃ ) (S ₄ ) A solenoid valve (C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ) can be detected according to the vehicle body condition and (1) A limit switch (L ₁ ) (L ₂ ) (L ₃ ) (L ₄ ) can be installed to convert the signal to the solenoid valve (C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ).

As shown in FIG. 3, a circular groove 2 is formed in the center of the body 7 of the sensing device 1, so that the rod bearing 14 is mounted on the upper cover 6 so as to be able to move freely inside the circular groove 2. ) And a flow path (8) for fixing the pendulum (3) and controlling the respective cylinders (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) inside the body (7). The sensing device 1 is configured to secure the body 7 to the vehicle body by coupling the valve 9 having the formation flow path groove 9 ″ to the coupling groove 15 and then fixing the body 7 to the vehicle body. As shown in Fig. 2, the valve 9 is installed so that the flow path 8 flows to the rod 3 of the pendulum 3 with a spring 12 elastically with the screw 13 as the pendulum 3 moves. Limit dogs (L ₁ ) (L ₂ ) (L ₃ ) (L ₄ ) respectively installed on the outer surface of the sensing device (1) by the dog (11) of the sensing rod (10) protruding at the end of the valve (9) Connected to and configured to control solenoid valve C ₁ (C ₂ ) (C ₃ ) (C ₄ ). The solenoid valve (C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ) is equipped with a pump (P) (P ") to maintain proper hydraulic pressure at all times and the cylinder (S ₁ ) (S ₂ ) (S ₃ ) The tank (T) is installed to recover the hydraulic flow discharged from (S ₄ ), and the hydraulic flow introduced into the tank (T) is circulated again through the pump (P) (P ″).

Each cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) is installed between the vehicle body and the wheel axle so as to be operated as the pumping and discharging of the hydraulic flow by the control of the sensing device (1). S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) is balanced at the same time as the vehicle body is raised and lowered under the control of the pendulum 3. Hydraulic cylinders (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) are preferably installed between the body and the wheel axle and used in combination with known coil springs, leaf springs, and speed-up pneumatic bellows. That is, the pendulum 3 changes the position of the pendulum due to the state of the driving vehicle generated in the vehicle, that is, the inertia by the speed, the centrifugal force by the rotation, and the impact by the oblique obstruction. The limit switch (L ₁ ) (L ₂ ) (L ₃ ) is transmitted to the valve (9) elastically connected with the spring (12) and the screw (13) and again by the dog (11) installed on the sensing rod of the valve (9). ) (soon as connected to L ₄₎ at the same time the limit switch _{(L 1) (L 2)} (L 3) ( solenoid valve receives an electrical signal of _{L 4) (C 1) (} C 2) (C 3) (C 4) By forming the up flow path (8) and the down flow path to control the cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) will also be able to balance the car body appropriately corresponding to the inertial centrifugal force shock.

In addition, the slight vibration of the wheel due to the road surface state can be offset by the present invention, but by using the existing coil spring and leaf spring or speed up, air bellows, etc. can increase the function of the suspension device.

According to the operation flow of the suspension according to the present invention, when the vehicle body is raised by the sensing device, the sensing device (moving pendulum)-limit switch-solenoid valve (switching to pump)-pump (hydraulic oil supply)-sensing device (flow control )-Cylinder-wheel shaft ascends, detects when the vehicle is lowered (moving of pendulum)-Limit switch- Solenoid valve (to switch to tank)-Tank-detector (flow control)-Cylinder (hydraulic oil discharge)-Wheel As the body descends from the axle, the cylinders S ₁ , S ₂ , S ₃ , and S ₄ are installed at the same time, and ascending and descending of the body is rapidly performed by supplying and discharging hydraulic oil. The sensing device 1 may be installed by supporting the lower cover 16 without restriction in the installation position in the vehicle body so that the pendulum 3 is located in the center of the circular groove 2 while the vehicle is in equilibrium. (P ") is installed at the position where the vehicle body can be rotated by driving force, and at the same time, solenoid valve (C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ) should be installed close to the sensing arch (1). desirable.

In the present invention, it is very important to control the height of each wheel, which means that the pendulum (when the vehicle runs on an inclined road surface as shown in FIG. 8 (a) automatically according to the position of the pendulum 3 of the sensing device 1) Since 3) is directed downward, the lower pendulum 3 is pushed by the spring 12 into the lower side while the pendulum 3 position changes toward the lower side according to the inclination angle. At this time, the valve 9 located at the lower side opens the flow path 8 by the movement of the flow path groove 9 ", and the limit switches L ₂ and L ₄ are connected to the dog 11 installed on the sensing rod 10 to limit the limit. By transmitting the electrical signal of the switch to the solenoid valve (C ₂ ) (C ₄ ), the flow path (8) is again the solenoid valve (C ₂ ) (C ₄ with hydraulic pressure formed in the flow path of the pump (P) (P ") side ), the hydraulic pressure is supplied through the supply doemeuro the sensing device (1) cylinders (S ₂₎ (S ₄₎ through the valve 9 is the higher of the lower body. It is connected to the in valve 9 is also a limit switch (L ₁₎ (L ₃₎ in the dog (11) installed on the sensing bar (10) while opening the flow passage (8) side relative to the high limit switch (L ₁₎ (L ₃ ) By transmitting the electrical signal of the solenoid valve (C ₁ ) (C ₃ ), the flow path (8) is connected to the tank (T) while the hydraulic oil in the cylinder (S ₁ ) (S ₃ ) is detected by the sensing device (1). And the solenoid valve (C ₁ ) (C ₃ ) is discharged to the tank (T) and at the same time the car body is horizontally different from the wheel angle. As shown in FIG. 8 (b), when the vehicle rotates while driving, the passenger inside the vehicle is leaned out of the vehicle due to the centrifugal force caused by the speed of the vehicle. At this time, the position of the pendulum 3 is also centered on the axis rotated by the centrifugal force. To act outwards.

Therefore, the outer valve 9 elastically installed on the rod 4 of the pendulum 3 as the spring 12 is pushed outward and moved together with the sensing rod 10 to the valve 9 located on the inner side thereof. 9 is applied to the flow path (8) and at the same time the dog (11) installed on the sensing rod of the valve (9) is connected to the limit switch (L ₁ ) (L ₂ ) (L ₃ ) (L ₄ ) and the solenoid valve ( The flow path 8 of C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ) is set. In other words, the limit switch (L ₁ ) (L ₃ ) connected to the outer valve (9) in the rotating direction connects the flow path of the solenoid valve (C ₁ ) (C ₃ ) to the (8) pump side according to the force of inertia. Supplying the hydraulic pressure of the cylinder (S ₁ ) (S ₃ ) to raise the outer vehicle body, the limit switch (L ₂ ) (L ₄ ) connected to the corresponding inner valve 9 is a solenoid valve (C ₂ ) (C The flow path 8 of ₄ ) is connected to the tank T side, and the hydraulic oil of the inner cylinders S ₂ and S ₄ is discharged back to the tank T, thereby lowering the vehicle body to be balanced.

If the pendulum (3) is in a normal position after rotation, the pendulum (3) is normally positioned and the vehicle body is also kept horizontally free from the influence of the centrifugal force.The sensor (1) detects the centrifugal force in proportion to the speed, regardless of the speed of rotation. By controlling, it can rotate flexibly without losing balance. As shown in 8 (c), even when sudden braking while driving, the position of the pendulum 3 is moved forward by the inertia force, and the valve 9 located at the front side is pushed forward and the upper valve 9 is also pendulum 93. Is connected to the rod 4 and is moved. In this case, too, as described above, the limit switch (L ₁ ) (L ₂ ) (L ₃ ) (L ₄ ) solenoid valve (C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ), cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) acts as the front body ascends and the rear body descends to prevent the passenger's body from forwarding.

By using the principle of the pendulum (3), it is possible to control the distance between the vehicle body and the wheels actively according to the conditions given to the vehicle body, that is, the inertia by the speed of the vehicle body, and the slope of the centrifugal force during rotation. We have developed a completely different type of suspension. That is, the inertia centrifugal force on the car body is not considered, and the balance is maintained by the weight of the car body, but due to the suspension of the present invention, the load is biased due to the suspension and the inertia of the force due to the centrifugal force during the change of direction. It automatically maintains the horizontal and stable imbalances of the body and at the same time contributes to safe driving as well as reducing fatigue caused by long rides with a comfortable ride.

Claims (5)

A hydraulic cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) between the wheel axle and the body of each wheel is correspondingly applied to the solenoid valve (C ₁ ) (C ₂ ) (C ₃ ) (C ₄ ) And the tank (1) and the pump (P) (P ") and the hydraulic system (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) and solenoid valve (C _{1), respectively.} ) (C ₂₎ (C ₃₎ (C _4), the centrifugal force at the time of unbalance rotation by inertia, the inclined surface by a running speed of the vehicle, detected to automatically detect control the vibration and impact of the road device and the (first) sensor device changing the signal of (1) to electrical signals the solenoid valve (C ₁₎ (C ₂₎ (C ₃₎ (C _4), the limit switch (L ₁₎ which can be passed to the _{(L 2) (L 3)} (L 4) Automobile hydraulic suspension configured by installing the. According to claim 1, a circular groove (2) is formed in the center of the body (7) of the sensing device (1) and the rod bearing (14) and the pin on the upper cover (6) to be able to move freely inside the circular groove (2) (5) and the pendulum (3) is installed in the body (7) to form a flow path (8) for controlling the respective cylinders (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) flow path groove A sensing device (1) configured to couple a valve (9 ") formed therein to a coupling groove (15) and then secure the body (7) to the vehicle body with a lower cover (16). The valve (9) according to claim 1 is controlled by a valve (9) installed so that the flow path (8) flows in the rod (4) of the electron (3) by a spring (12) elastically with a screw (13) in accordance with the movement of the pendulum (3), The limiting switches L ₁ , L ₂ , L ₃ and L ₄ respectively installed on the outer surface of the sensing device 1 are connected by the dog 11 of the sensing rod 10 protruding from the end of the valve 9. solenoid valve _{(C 1) (C 2)} (C 3) pump that is configured to control the (C ₄₎ the solenoid valves _{(C 1) (C 2)} (C 3) (C 4) is maintained at all times an appropriate hydraulic ( Install P) (P ") and connect the pump (P) (P") when supplying hydraulic oil to the cylinders S ₁ (S ₂ ) (S ₃ ) (S ₄ ) along the connection flow path. The installation system of the tank (T) to recover the hydraulic oil introduced into the tank (T) is to be re-circulated back through the pump (P) (P ") to the vehicle yuapp suspension control system. According to claim 1, the cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) between the vehicle body and the wheel shaft to be operated as the pumping and discharge of the hydraulic flow under the control of the sensing device (1). Each cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) is installed, the hydraulic suspension device, characterized in that the vehicle body is raised and lowered under the control of the pendulum (3). The hydraulic cylinder (S ₁ ) (S ₂ ) (S ₃ ) (S ₄ ) is installed between the vehicle body and the wheel axle, and is used in parallel with a known coil spring and a speed up-over pneumatic bellows. An automobile hydraulic suspension system.

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