KR20150100441A - Suspension apparatus for vehicle - Google Patents
Suspension apparatus for vehicle Download PDFInfo
- Publication number
- KR20150100441A KR20150100441A KR1020140022266A KR20140022266A KR20150100441A KR 20150100441 A KR20150100441 A KR 20150100441A KR 1020140022266 A KR1020140022266 A KR 1020140022266A KR 20140022266 A KR20140022266 A KR 20140022266A KR 20150100441 A KR20150100441 A KR 20150100441A
- Authority
- KR
- South Korea
- Prior art keywords
- cylinder
- hydraulic line
- hydraulic
- vehicle
- piston
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
- B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
- B60G15/062—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper the spring being arranged around the damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
- B60G17/0157—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/016—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by their responsiveness, when the vehicle is travelling, to specific motion, a specific condition, or driver input
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/0416—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions
- B60G17/0432—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics regulated by varying the resiliency of hydropneumatic suspensions by varying the number of accumulators connected to the hydraulic cylinder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/048—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics with the regulating means inside the fluid springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
- B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
- B60G17/056—Regulating distributors or valves for hydropneumatic systems
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
An invention for a vehicle suspension device is disclosed. A suspension system for a vehicle according to the present invention includes: a piston installed on a cross member connected to front and rear wheels; A suspension spring installed to support both ends of the piston; A first cylinder installed between the piston and the vehicle body to adjust the height of the vehicle body; A second cylinder connected to both ends of the suspension spring and stretched and contracted together with the suspension spring; A hydraulic pressure correction device connected to the vehicle body and the cross member; A hydraulic line connecting the first cylinder, the second cylinder and the hydraulic pressure compensating device; And a flow control valve installed on the hydraulic line for regulating the flow of the fluid to or from the first cylinder, the second cylinder, and the hydraulic pressure compensating device.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a suspension system for a vehicle, and more particularly, to a suspension system for a vehicle capable of improving the dynamic performance of the vehicle.
Generally, the vehicle travels in various driving environments. The vehicle is provided with a shock absorber to absorb the impact of the vehicle. As the stiffness of the shock absorber is weakened, the impact from the road surface is more absorbed and the ride comfort is improved. However, as the stiffness of the shock absorber increases, the ride comfort is improved because the vehicle tends to sag when the vehicle brakes, accelerates or turns.
BACKGROUND OF THE INVENTION [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2007-0080028 (published on Mar. 08, 2007, entitled "Vehicle MacPherson Strut Suspension System").
Conventionally, as the stiffness of the shock absorber weakens, the riding comfort of the vehicle is improved at the time of straight running in the middle and lower range. However, when the vehicle brakes, accelerates and turns, the dynamic performance of the vehicle deteriorates as the vehicle tends to lean. Also, as the stiffness of the shock absorber increases, the riding feel of the vehicle is lowered at the time of straight running in the middle and lower range. However, when the braking, acceleration and turning of the vehicle are performed, the dynamic performance of the vehicle is improved. Also, if the load of the vehicle is biased to a specific position according to the number of passengers and the loading position of the cargo, the dynamic performance may deteriorate as the load of the vehicle is deviated to one side.
Therefore, there is a need to improve this.
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a vehicle stability control system, which can maintain a constant dynamic performance even in a normal straight- And a suspension system for a vehicle.
Another object of the present invention is to provide a vehicle suspension device capable of improving the dynamic performance of a vehicle by alleviating the load of the vehicle to one side even if the load of the vehicle is doubled depending on the number of passengers and the loading position of the cargo .
Another object of the present invention is to provide a vehicle suspension device capable of removing a heavy stabilizer bar of an existing vehicle and improving the dynamic performance and fuel consumption performance due to the weight reduction of the vehicle due to the effect of replacing this role.
A suspension system for a vehicle according to the present invention includes: a piston installed on a cross member connected to a front wheel and a rear wheel; A suspension spring installed to support both ends of the piston; A first cylinder disposed between the piston and the vehicle body to adjust a height of the vehicle body; A second cylinder connected to both ends of the suspension spring and expanded / contracted together with the suspension spring; A hydraulic pressure correction device connected to the vehicle body and the cross member; A hydraulic line connecting the first cylinder, the second cylinder, and the hydraulic pressure correction device; And a flow control valve installed on the hydraulic line for regulating a flow path for supplying or blocking fluid to the first cylinder, the second cylinder, and the hydraulic pressure correction device.
The hydraulic pressure correction device includes a housing installed in the vehicle body and having one side connected to the hydraulic line; A floating member that divides an internal space of the housing into a hydraulic chamber and a pneumatic chamber and is movably installed in an inner space of the housing; An air piston capable of compressing and expanding air in the pneumatic chamber; And an actuator capable of operating the piston. The actuator that actuates the air piston is driven by a device such as a step motor or the like and has a role of screwing or otherwise operating the air piston to compress and expand the air.
The hydraulic line may include: a first hydraulic line connected to the hydraulic chamber; A second hydraulic line connected to the first cylinder and the first hydraulic line; And a third hydraulic line connected to the second cylinder and the first hydraulic line.
The flow control valve may be a three-way valve installed at a portion where the first hydraulic line, the second hydraulic line and the third hydraulic line are connected.
The first cylinder and the second cylinder must have different areas so that they can operate with each other on the principle of Pascal.
According to the present invention, it is possible to maintain a constant dynamic performance even when the vehicle is normally running straight, and to improve the dynamic performance of the vehicle even when the vehicle is braking, accelerating, or turning.
In addition, according to the present invention, it is possible to improve the dynamic performance of a vehicle by alleviating the load of the vehicle to one side even if the load of the vehicle is reduced depending on the number of passengers and the loading position of the cargo.
Further, according to the present invention, since the role of the stabilizer bar of the vehicle can be substituted, the dynamic performance and the fuel consumption performance due to the weight reduction of the vehicle due to the heavy stabilizer replacement effect can be improved.
1 is a block diagram schematically showing a suspension system for a vehicle according to a first embodiment of the present invention.
2 is an enlarged view schematically showing a suspension system for a vehicle according to a first embodiment of the present invention.
Fig. 3 is a flowchart showing how the suspension system for a vehicle according to the first embodiment of the present invention is operated in the load unbalance reduction mode.
4 is an operational state view showing a state in which a vehicle suspension apparatus according to the first embodiment of the present invention is operated in a load unbalance dissipation mode.
5 is a flowchart showing that the vehicle suspension device according to the first embodiment of the present invention is operated in the swing motion mode in the straight run mode.
6 is an operational state diagram showing a state in which the vehicle suspension device according to the first embodiment of the present invention is operated in the swing motion mode in the linear travel mode.
7 is a flowchart showing that the vehicle suspension device according to the first embodiment of the present invention is operated in the acceleration running mode in the control running mode.
8 is an operational state view showing a state in which the vehicle suspension device according to the first embodiment of the present invention is operated in the control running mode in the acceleration running mode.
9 is an operational state view showing a state in which the vehicle suspension device according to the first embodiment of the present invention is operated in the control running mode in the acceleration running mode.
10 is an operational state view showing a state in which the vehicle suspension device according to the first embodiment of the present invention is operated in the braking mode in the control running mode.
11 is a schematic view showing a suspension system for a vehicle according to a second embodiment of the present invention.
12 is a configuration diagram schematically showing a suspension system for a vehicle according to a third embodiment of the present invention.
Hereinafter, embodiments of a vehicle suspension device according to the present invention will be described with reference to the accompanying drawings. In the course of describing the suspension device for a vehicle, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.
First, a vehicle suspension system according to a first embodiment of the present invention will be described.
FIG. 1 is a schematic view showing a suspension system for a vehicle according to a first embodiment of the present invention, and FIG. 2 is an enlarged view schematically showing a suspension system for a vehicle according to a first embodiment of the present invention.
1 and 2, a vehicle suspension system according to a first embodiment of the present invention includes a
The
The
Both ends of the
The
The
The hydraulic
The
The floating
The
The
The
The operation of the suspension system for a vehicle according to the first embodiment of the present invention will be described.
FIG. 3 is a flowchart showing that the vehicle suspension system according to the first embodiment of the present invention is operated in the load unbalance dissipation mode, and FIG. 4 is a flowchart showing the operation of the vehicle suspension system according to the first embodiment of the present invention, As shown in Fig.
3 and 4, when a passenger or a cargo is mounted on a vehicle, the load is concentrated on one side of the vehicle. At this time, as one side of the vehicle is tilted by the load, the garage is relatively lowered.
A sensor unit (not shown) senses loading of a passenger or loading of a cargo (S11). The sensor unit transmits a signal relating to the height of the garage to the
The
The
The
If the
As described above, when the load of the vehicle is unbalanced due to the loading of the passenger and the cargo, the height of the portion where the load is concentrated on the vehicle can be uniformly adjusted. Therefore, when the vehicle is running, .
FIG. 5 is a flowchart showing that the vehicle suspension device according to the first embodiment of the present invention is operated in the swing motion mode in the straight running mode, and FIG. 6 is a flowchart showing the operation of the vehicle suspension device according to the first embodiment of the present invention, And the vehicle is operated in the revolving motion mode in the running mode.
5 and 6, the vehicle is operated in the normal straight traveling mode (S21). The normal straight run mode means that the vehicle runs on a flat road at a constant speed. The
In the sensor part, it is possible to detect the turning amount by measuring the amount of displacement of the vehicle (the height of the four parts near the wheel) or the gyro sensor and the acceleration sensor or the steering angle of the vehicle, or to estimate the turning situation using GPS and road information And detects whether the vehicle is turning (S22). The sensor unit transmits a signal relating to the speed of the vehicle to the
When the vehicle performs a swing motion to one side (the right side in Fig. 6), the load is concentrated on one side of the vehicle. At this time, as the fluid is supplied to the
As described above, by increasing the height of the
FIG. 7 is a flowchart showing how the suspension system for a vehicle according to the first embodiment of the present invention is operated in the acceleration running mode in the control running mode, and FIG. 8 is a flowchart showing the operation of the vehicle suspension system according to the first embodiment of the present invention, 9 is an operational state diagram showing a state in which the vehicle suspension device according to the first embodiment of the present invention is operated in the deceleration running mode in the control running mode .
Referring to Figs. 7 to 9, the vehicle is operated in the straight running mode (S31).
The sensor unit measures the speed of the vehicle and detects whether the vehicle is decelerating or not (S32). The sensor unit transmits a signal relating to the speed of the vehicle to the
When it is determined that the vehicle is decelerating, the
The fluid in the
At this time, since the height of the
10 is an operational state diagram showing a state in which the vehicle suspension device according to the first embodiment of the present invention is operated in the acceleration running mode in the control running mode.
Referring to FIG. 10, when the vehicle is accelerated, the load is applied to the rear side of the vehicle. A fluid is supplied to the
Since the process of supplying the fluid to the
Next, a vehicle suspension system according to a second embodiment of the present invention will be described.
11 is a schematic view showing a suspension system for a vehicle according to a second embodiment of the present invention.
11, the vehicle suspension system according to the first embodiment of the present invention includes a
The
The
Both ends of the
The
The
The hydraulic
The
The floating
The
The
The
The second embodiment differs from the first embodiment in that the
Next, a vehicle suspension system according to a third embodiment of the present invention will be described.
11 is a schematic view showing a suspension system for a vehicle according to a second embodiment of the present invention.
12, a vehicle suspension system according to the first embodiment of the present invention includes a
The
The
The
The hydraulic
The
The floating
The
The
The
The third embodiment is different from the first embodiment in that the
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand.
Accordingly, the true scope of protection of the present invention should be defined by the claims.
10: Body 110: Cross member
120: Piston 121: Suspension cylinder
122: Lower plate 125: Suspension rod
126: upper plate 130: suspension spring
140: first cylinder 150: second cylinder
160: Hydraulic pressure compensating device 161: Housing
161a:
163: Floating member 165: Air piston
170: hydraulic line 171: first hydraulic line
172: second hydraulic line 173: third hydraulic line
180: flow control valve 180: control part
Claims (12)
A suspension spring installed to support both ends of the piston;
A first cylinder disposed between the piston and the vehicle body to adjust a height of the vehicle body;
A second cylinder connected to both ends of the suspension spring and expanded / contracted together with the suspension spring;
A hydraulic pressure correction device connected to the vehicle body and the cross member;
A hydraulic line connecting the first cylinder, the second cylinder, and the hydraulic pressure correction device; And
And a flow control valve installed in the hydraulic line for regulating a flow path for supplying or blocking fluid to the first cylinder, the second cylinder, and the hydraulic pressure compensating device.
The hydraulic pressure correcting device comprises:
A housing installed in the vehicle body and having one side connected to the hydraulic line;
A floating member that divides an internal space of the housing into a hydraulic chamber and a pneumatic chamber and is movably installed in an inner space of the housing;
An air piston installed on the other side of the housing for compressing and expanding the air in the pneumatic chamber to move the floating member; And
And a step motor provided below the housing to allow the air piston to move up and down.
The hydraulic line may include:
A first hydraulic line connected to the hydraulic chamber;
A second hydraulic line connected to the first cylinder and the first hydraulic line; And
And a third hydraulic line connected to the second cylinder and the first hydraulic line.
Wherein the flow control valve is a three-way valve provided at a portion to which the first hydraulic line, the second hydraulic line and the third hydraulic line are connected.
A suspension spring installed to support both ends of the piston;
A first cylinder disposed between the piston and the vehicle body to adjust a height of the vehicle body;
A second cylinder connected to the vehicle body and the cross member and stretched and contracted together with the suspension spring;
A hydraulic pressure correction device connected to the vehicle body and the cross member;
A hydraulic line connecting the first cylinder, the second cylinder, and the hydraulic pressure correction device; And
And a flow control valve installed in the hydraulic line for regulating a flow path for supplying or blocking fluid to the first cylinder, the second cylinder, and the hydraulic pressure compensating device.
The hydraulic pressure correcting device comprises:
A housing installed in the vehicle body and having one side connected to the hydraulic line;
A floating member that divides an internal space of the housing into a hydraulic chamber and a pneumatic chamber and is movably installed in an inner space of the housing;
An air piston installed on the other side of the housing for compressing and expanding the air in the pneumatic chamber to move the floating member; And
And a step motor provided below the housing to allow the air piston to move up and down.
The hydraulic line may include:
A first hydraulic line connected to the hydraulic chamber;
A second hydraulic line connected to the first cylinder and the first hydraulic line; And
And a third hydraulic line connected to the second cylinder and the first hydraulic line.
Wherein the flow control valve is a three-way valve provided at a portion to which the first hydraulic line, the second hydraulic line and the third hydraulic line are connected.
A cylinder disposed between the piston and the vehicle body to adjust a height of the vehicle body;
A hydraulic pressure correction device connected to the vehicle body and the cross member;
A hydraulic line connecting the piston, the cylinder, and the hydraulic pressure compensating device; And
And a flow control valve installed on the hydraulic line to regulate a flow path for supplying or blocking fluid to the piston, the cylinder, and the hydraulic pressure correcting device.
The hydraulic pressure correcting device comprises:
A housing installed in the vehicle body and having one side connected to the hydraulic line;
A floating member that divides an internal space of the housing into a hydraulic chamber and a pneumatic chamber and is movably installed in an inner space of the housing;
An air piston installed on the other side of the housing for compressing and expanding the air in the pneumatic chamber to move the floating member; And
And a step motor provided below the housing to allow the air piston to move up and down.
The hydraulic line may include:
A first hydraulic line connected to the hydraulic chamber;
A second hydraulic line connected to the cylinder and the first hydraulic line; And
And a third hydraulic line connected to the piston and the first hydraulic line.
Wherein the flow control valve is a three-way valve provided at a portion to which the first hydraulic line, the second hydraulic line and the third hydraulic line are connected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140022266A KR20150100441A (en) | 2014-02-25 | 2014-02-25 | Suspension apparatus for vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020140022266A KR20150100441A (en) | 2014-02-25 | 2014-02-25 | Suspension apparatus for vehicle |
Publications (1)
Publication Number | Publication Date |
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KR20150100441A true KR20150100441A (en) | 2015-09-02 |
Family
ID=54242160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020140022266A KR20150100441A (en) | 2014-02-25 | 2014-02-25 | Suspension apparatus for vehicle |
Country Status (1)
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KR (1) | KR20150100441A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102239457B1 (en) * | 2020-01-08 | 2021-04-14 | 아주대학교산학협력단 | Method for maintaining horizontal posture and control system thereof |
-
2014
- 2014-02-25 KR KR1020140022266A patent/KR20150100441A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102239457B1 (en) * | 2020-01-08 | 2021-04-14 | 아주대학교산학협력단 | Method for maintaining horizontal posture and control system thereof |
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