CN107284174B - Automatic side-tipping automobile suspension system - Google Patents
Automatic side-tipping automobile suspension system Download PDFInfo
- Publication number
- CN107284174B CN107284174B CN201710347655.XA CN201710347655A CN107284174B CN 107284174 B CN107284174 B CN 107284174B CN 201710347655 A CN201710347655 A CN 201710347655A CN 107284174 B CN107284174 B CN 107284174B
- Authority
- CN
- China
- Prior art keywords
- valve
- suspension
- oil
- cylinder
- rodless cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 182
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 238000013016 damping Methods 0.000 claims description 110
- 238000007599 discharging Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 10
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000005096 rolling process Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 230000003068 static effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2500/00—Indexing codes relating to the regulated action or device
- B60G2500/30—Height or ground clearance
- B60G2500/32—Height or ground clearance of only one vehicle part or side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
- B60G2800/24—Steering, cornering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention discloses an automatic side-tipping automobile suspension system, which comprises a suspension oil cylinder, an energy accumulator, a power source, an oil tank, a first proportional valve, a zero leakage valve, a reversing valve and a controller, wherein the energy accumulator is arranged on the suspension oil cylinder; a switch valve is connected between a rod cavity and a rodless cavity of the suspension cylinder; the energy accumulator is connected with the rodless cavity through the valve block; the power source is connected with the oil tank, and the output end of the power source and the input end of the oil tank are respectively connected with the reversing valve, the zero leakage valve and the first proportional valve in series and are connected with the rodless cavity; the reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve at one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve at one side of the suspension cylinder in a compression state is communicated with the power source. The invention can quickly and accurately adjust the up-and-down displacement of the left and right suspension cylinders, realize the automatic inclination and the side tilting of the vehicle body in the same direction of steering, and ensure that the gravity of the vehicle counteracts the centrifugal inertia force during steering, thereby improving the side turning threshold value of the vehicle and increasing the running stability.
Description
Technical Field
The invention relates to the technical field of hydro-pneumatic suspensions, in particular to an automatic side-tipping automobile suspension system.
Background
With the increasing of the vehicle preservation amount in China, the urban traffic jam problem is serious, and the traffic jam problem is prominent in large and medium cities, especially at peak of business hours, so that some narrow-body vehicles with small vehicle body width appear, are light and flexible, can effectively avoid the jam, have the flexibility of motorcycles and the safety and stability of the vehicles, but are easy to turn on one's side when the vehicle body is in a small width, high speed or rapid steering.
The active suspension system with the automatic side-tipping of the vehicle body can enable the vehicle to tilt towards the same steering direction like a motorcycle and the like according to the information such as the vehicle speed, the steering wheel rotation angle, the vehicle body side-tipping angle, the side-tipping angle speed and the side-tipping angle acceleration, so that the gravity of the vehicle counteracts the centrifugal inertia force during steering, the side-tipping threshold of the vehicle is improved, and the running stability and the driving pleasure are improved. The main purpose of the active suspension system in China at present is to improve the driving comfort and the operation stability of the vehicle by adjusting the damping and the rigidity of the suspension, and part of the suspension has the function of raising or lowering the vehicle, but no active suspension system which can automatically roll the vehicle according to the driving working condition exists.
Disclosure of Invention
The invention mainly solves the technical problem of providing an automatic rolling automobile suspension system which can realize the automatic rolling function of a small automobile.
In order to solve the technical problems, the invention adopts a technical scheme that: there is provided an automatic roll automotive suspension system comprising: the device comprises a suspension oil cylinder, an energy accumulator, a power source, an oil tank, a first proportional valve, a zero leakage valve, a reversing valve and a controller; a switch valve is connected between the rod cavity and the rodless cavity of the suspension cylinder; an oil port of the energy accumulator is connected with a rodless cavity of the suspension oil cylinder through a valve block; the power source is connected with the oil tank, wherein the output end of the power source and the input end of the oil tank are respectively connected with the reversing valve, the zero leakage valve and the first proportional valve in series and are connected with the rodless cavity of the suspension oil cylinder; the reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve on one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve on one side of the suspension cylinder in a compression state is communicated with the power source.
In a preferred embodiment of the present invention, a valve assembly connected in series with the switch valve is further connected between the rod cavity and the rodless cavity of the suspension cylinder; the valve assembly comprises a one-way valve, a damping hole, a switching valve and a damping hole which are connected in series.
In a preferred embodiment of the present invention, the valve block includes a check valve and a damping orifice, a relief valve and a second proportional valve connected in parallel.
In a preferred embodiment of the invention, the valve block comprises a check valve, a damping hole, a relief valve, a switching valve and a damping hole connected in series with the check valve.
In a preferred embodiment of the invention, the rod cavity of the suspension cylinder is internally provided with a pressure sensor.
In a preferred embodiment of the present invention, the bottom of the suspension cylinder is provided with overload protection.
The beneficial effects of the invention are as follows: the automatic rolling automobile suspension system has the advantages that the structure is simple, the riding comfort is effectively improved, the automatic rolling automobile suspension system is communicated with the reversing valve through the proportional valve, the non-leakage valve and the like, the vertical displacement of the left suspension cylinder and the right suspension cylinder is quickly and accurately regulated under the action of a power source, the automatic inclination and rolling of the automobile body in the same direction of steering are realized, the gravity of the automobile counteracts the centrifugal inertia force during steering, the rollover threshold of the automobile is improved, the running stability and the driving fun are improved, meanwhile, the oil pressure in the suspension cylinder is kept stable when the rolling is not needed, and the problems of sinking of the automobile body due to leakage and the like are avoided.
Drawings
FIG. 1 is a schematic perspective view of an embodiment 1 of an automatic roll automotive suspension system according to the present invention;
FIG. 2 is a schematic perspective view of an embodiment 2 of an auto-roll automotive suspension system according to the present invention;
the components in the drawings are marked as follows: 1. the hydraulic control system comprises a suspension oil cylinder, an accumulator, a power source, a fuel tank, a first proportional valve, a zero leakage valve, a reversing valve, a switching valve, a valve block, a check valve, a damping hole, a relief valve, a second proportional valve, a valve assembly, an overload protection valve and a pressure sensor.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention includes:
example 1
An automatic roll automotive suspension system comprising: suspension cylinder 1, accumulator 2, power source 3, oil tank 4, first proportional valve 5, zero leakage valve 6, reversing valve 7, and controller (not shown). And a switch valve 8 is connected between the rod cavity and the rodless cavity of the suspension cylinder 1. The bottom of the suspension cylinder is provided with an overload protection 15, and a rod cavity is provided with a pressure sensor 16.
The oil port of the energy accumulator 2 is connected with the rodless cavity of the suspension cylinder 1 through a valve block 9. The valve block 9 comprises a check valve 10, a damping hole 11, a load release valve 12 and a second proportional valve 13 which are connected in parallel, wherein the check valve 10 and the damping hole 11 are connected in series, and only oil liquid is allowed to flow to the energy accumulator in one direction. The damping hole in series connection with the check valve in the valve block can play a role in shunting when the check valve is opened during suspension compression, and the check valve is closed when the suspension system stretches, so that compression damping is smaller than stretching damping under the condition that the opening degree of the second proportional valve is not changed, frequent adjustment of the proportional valve is avoided, comfort of running of a vehicle on an uneven road surface is improved, and overlarge impact is avoided during suspension compression. If the second proportional valve is in a normally open state during damage, the damping of the vehicle is minimum, and if the second proportional valve is in a normally closed state, oil in the energy accumulator cannot flow back to the suspension cylinder during suspension extension, so that the second proportional valve is prevented from being in the normally closed state during damage.
The power source 3 is connected with the oil tank 4, wherein the output end of the power source 3 and the input end of the oil tank 4 are respectively connected with the reversing valve 7, the zero leakage valve 6 and the first proportional valve 5 in series, and are connected with the rodless cavity of the suspension oil cylinder 1. The reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve on one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve on one side of the suspension cylinder in a compression state is communicated with the power source.
The suspension system of this embodiment operates on the principle that:
the vehicle normally runs on a horizontal straight road surface, a switching valve of a rod cavity and a rodless cavity which are communicated with the suspension oil cylinder is opened, oil liquid of the rod cavity and the rodless cavity is the same, and the rodless cavity bears the load of the vehicle and the pressure load of the rod cavity.
If the straight-line driving road section encounters a road bulge, the suspension is compressed, part of oil in the rodless cavity flows to the rod-containing cavity through the switch valve, and the part of oil flowing is not damped, so that negative pressure and cavitation damage of the rod-containing cavity are avoided; and one part of the damping fluid flows to the energy accumulator through the valve block, specifically, flows to the energy accumulator through the one-way valve, the damping hole and the second proportional valve in the valve block, wherein the one-way valve is opened, the damping is small, and the second proportional valve controls compression damping in real time through adjusting the opening degree, so that the vehicle achieves optimal damping under all working conditions, and vibration is effectively damped.
If the straight-line driving road section meets a road pit, the suspension stretches, part of oil in the rod cavity flows to the rodless cavity through the switch valve, in addition, part of oil in the energy accumulator flows to the rodless cavity through the valve block, specifically, flows to the rodless cavity through the second proportional valve, and stretching damping is controlled in real time by adjusting the opening of the proportional valve, so that the damping of the vehicle is optimal under all working conditions, and vibration is effectively attenuated. Although the damping of the oil flowing from the accumulator to the rodless cavity is larger, the extension speed of the general vehicle suspension is smaller than the compression speed, and the size of the damping hole can be reasonably designed according to the movement speed of the piston of the suspension cylinder so as to avoid cavitation damage in the rodless cavity.
The vehicle turns to the side, the outside suspension rises, the inside suspension lowers, the vehicle body rotates around the central axis, the outside suspension rises, a first proportional valve and a zero leakage valve which are connected with an outside suspension cylinder are opened, a reversing valve is communicated with a power source (a high-pressure oil pump), the controller can calculate and control the opening degree of the first proportional valve through the speed, the turning angle, the vehicle body side-rolling angle and the suspension displacement, the length and the speed of the suspension stretching are accurately controlled, high-pressure oil from the power source flows into a rodless cavity of the outside suspension cylinder through the first proportional valve, meanwhile, a switching valve between the rod cavity and the rodless cavity is opened, and part of oil in the rod cavity enters the rodless cavity; the inner side suspension is reduced, a first proportional valve and a zero leakage valve connected with an inner side suspension cylinder are opened, the reversing valve oil tank is communicated, part of oil in the rodless cavity enters the oil tank (low-pressure oil tank) through the first proportional valve, part of oil in the rodless cavity flows into the rod cavity, and the controller can calculate and control the opening of the first proportional valve through the speed, the steering angle, the body roll angle and the suspension displacement, so that the height and the speed of suspension reduction are accurately controlled. The suspension system inclines towards the same direction of steering, so that the gravity of the vehicle counteracts the centrifugal inertia force during steering, the rollover threshold of the vehicle is improved, and the running stability and the driving pleasure are improved.
Under the static working condition of the vehicle, a switching valve between a rod cavity and a rodless cavity which are communicated with the suspension oil cylinder is closed, the oil is incompressible, the suspension oil cylinder is specially locked, the vehicle body of a small-sized vehicle provided with the suspension system is kept horizontal in a static state, the vehicle body cannot shake left and right, and the vehicle is prevented from tilting due to excessive load.
Example 2
An automatic roll automotive suspension system comprising: suspension cylinder 1, accumulator 2, power source 3, oil tank 4, first proportional valve 5, zero leakage valve 6, reversing valve 7, and controller (not shown). A switching valve 8 and a valve assembly 14 which are connected in series are connected between the rod cavity and the rodless cavity of the suspension cylinder 1; the valve assembly 14 comprises a check valve 10, a damping hole 11, a switching valve 8 and a damping hole 11 connected in series, wherein the check valve 10 only allows oil to flow from a rodless cavity to a rod-free cavity, two damping holes in the valve assembly are connected in parallel, one damping hole is controlled by the switching valve to realize 2-level damping adjustment, in the stretching stroke, if the switching valve connected in series with the damping hole is closed, oil can only flow from one normally-open damping hole to the rodless cavity to realize large damping, and if the switching valve connected in series with the damping hole is opened, oil can flow to the rodless cavity through the two parallel damping holes to realize small damping.
The bottom of the suspension cylinder is provided with an overload protection 15, and a rod cavity is provided with a pressure sensor 16.
The oil port of the energy accumulator 2 is connected with the rodless cavity of the suspension cylinder 1 through a valve block 9. The valve block 9 comprises a check valve 10, a damping hole 11, a load release valve 12, a switch valve 8 and a damping hole 11 connected in series with the check valve, wherein the check valve 10 can only allow oil to flow from the energy accumulator to the rodless cavity; the switch valve is opened, oil can flow to the energy accumulator through the two parallel damping holes, and small damping is realized; when the suspension is in a running process, larger impact is generated, the pressure in the suspension cylinder exceeds the set pressure of the relief valve, and the relief valve is opened, so that the cylinder is prevented from being damaged by the excessive pressure.
The power source 3 is connected with the oil tank 4, wherein the output end of the power source 3 and the input end of the oil tank 4 are respectively connected with the reversing valve 7, the zero leakage valve 6 and the first proportional valve 5 in series, and are connected with the rodless cavity of the suspension oil cylinder 1. The reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve on one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve on one side of the suspension cylinder in a compression state is communicated with the power source.
The working principle of the hydro-pneumatic suspension system of the embodiment is as follows:
the vehicle normally runs on a horizontal straight road surface, a switching valve (positioned at the lower part of a one-way valve) which is communicated with a rod cavity and a rodless cavity of the suspension cylinder is opened, the rod cavity is communicated with oil in the rodless cavity, and the rodless cavity bears the load of the vehicle and the pressure load of the rod cavity.
If the straight-line driving road section encounters the road bulge, the suspension compresses, one part of oil liquid in the rodless cavity flows to the rod-containing cavity through the switch valve (positioned at the lower part of the one-way valve) and the one-way valve, the flow of the part of oil liquid is not damped, the negative pressure and cavitation damage of the rod-containing cavity are avoided, and one part of oil liquid flows to the energy accumulator through the valve block, specifically, flows to the energy accumulator through two parallel damping holes in the valve block, wherein one damping hole is controlled through the switch valve, so that the level 2 damping is adjustable. If the switch valve is closed, the oil can flow to the energy accumulator only through one normally-open damping hole to realize large damping, if the switch valve is opened, the oil can flow to the energy accumulator through two parallel damping holes to realize small damping, and when the oil runs, larger impact is encountered, the pressure in the oil cylinder exceeds the set pressure of the relief valve, and the relief valve is opened to avoid the damage of the oil cylinder due to the overlarge pressure.
If the straight-line driving road section meets a road pit, the suspension stretches, part of oil in the rod cavity flows to the rodless cavity through a switching valve (positioned below the one-way valve) and two parallel damping holes, wherein the two damping holes are connected in parallel, one damping hole is controlled by the switching valve, 2-level damping is adjustable, and if the switching valve connected with the damping hole in series is closed, the oil can only flow to the rodless cavity from one normally-open damping hole, so that large damping is realized; if the switching valve connected in series with the damping holes is opened, oil can flow to the rodless cavity through the two parallel damping holes, so that small damping is realized; in addition, part of oil in the energy accumulator flows to the rodless cavity through the valve block, specifically, the oil flows to the rodless cavity through the one-way valve, the flowing process is undamped, and negative pressure and cavitation damage of the rodless cavity are avoided.
The vehicle turns to the side, the outside suspension rises, the inside suspension lowers, the vehicle body rotates around the central axis, the outside suspension rises, a first proportional valve and a zero leakage valve which are connected with an outside suspension cylinder are opened, a reversing valve is communicated with a power source (a high-pressure oil pump), the controller can calculate and control the opening degree of the first proportional valve through the speed, the turning angle, the vehicle body side-rolling angle and the suspension displacement, the length and the speed of the suspension stretching are accurately controlled, high-pressure oil from the power source flows into a rodless cavity of the outside suspension cylinder through the first proportional valve, meanwhile, a switching valve (positioned below the one-way valve) between the rod cavity and the rodless cavity is opened, the switching valve which is connected with a damping hole in series in the valve assembly is opened, and part of oil in the rod cavity enters the rodless cavity; the inner side suspension is reduced, a first proportional valve and a zero leakage valve connected with an inner side suspension cylinder are opened, an oil tank of the reversing valve is communicated, part of oil in the rodless cavity enters the oil tank (low-pressure oil tank) through the first proportional valve, part of oil in the rodless cavity flows to the rod-shaped cavity through a switch valve (positioned below the one-way valve) and the one-way valve, and a controller can calculate and control the opening of the first proportional valve through the speed, the steering angle, the side-tipping angle of the vehicle body and the suspension displacement, so that the height and the speed of the suspension reduction are accurately controlled. The suspension system inclines towards the same direction of steering, so that the gravity of the vehicle counteracts the centrifugal inertia force during steering, the rollover threshold of the vehicle is improved, and the running stability and the driving pleasure are improved.
Under the static working condition of the vehicle, a switching valve (positioned at the lower part of a one-way valve) between a rod cavity and a rodless cavity of the communicated suspension cylinder is closed, so that the suspension cylinder is locked by incompressible oil, the vehicle body of a small-sized vehicle provided with the suspension system is kept horizontal under the static state, the vehicle body cannot shake left and right, and the vehicle is prevented from tilting due to excessive load.
Example 3
An automatic roll automotive suspension system comprising: suspension cylinder 1, accumulator 2, power source 3, oil tank 4, first proportional valve 5, zero leakage valve 6, reversing valve 7, and controller (not shown). And a switch valve 8 is connected between the rod cavity and the rodless cavity of the suspension cylinder 1. The bottom of the suspension cylinder is provided with an overload protection 15, and a rod cavity is provided with a pressure sensor 16.
The oil port of the energy accumulator 2 is connected with the rodless cavity of the suspension cylinder 1 through a valve block 9. The valve block 9 comprises a check valve 10, a damping hole 11, a load release valve 12, a switching valve 8 and a damping hole 11 connected in series with the check valve, wherein the check valve 10 only allows oil to flow in one direction from the accumulator to the rodless cavity. In addition, two damping holes are connected in parallel, one of the damping holes is controlled by a switch valve, 2-level damping adjustment is realized, in a compression stroke, the switch valve is closed, oil can only flow to the energy accumulator from one common damping hole, large damping is realized, the switch valve is opened, oil can flow to the energy accumulator through the two parallel damping holes, small damping is realized, large impact is encountered in the driving process, the pressure in the suspension oil cylinder exceeds the set pressure of the load release valve, and the load release valve is opened, so that the oil cylinder is prevented from being damaged by excessive pressure.
The power source 3 is connected with the oil tank 4, wherein the output end of the power source 3 and the input end of the oil tank 4 are respectively connected with the reversing valve 7, the zero leakage valve 6 and the first proportional valve 5 in series, and are connected with the rodless cavity of the suspension oil cylinder 1. The reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve on one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve on one side of the suspension cylinder in a compression state is communicated with the power source.
The working principle of the embodiment is as follows:
the vehicle normally runs on a horizontal straight road surface, a switch valve which is communicated with a rod cavity and a rodless cavity of the suspension cylinder is opened, the rod cavity is communicated with oil in the rodless cavity, and the rodless cavity bears the load of the vehicle and the pressure load of the rod cavity.
If the straight-line driving road section encounters a road bulge, the suspension is compressed, part of oil in the rodless cavity flows to the rod-containing cavity through the switch valve, and the part of oil flowing is not damped, so that negative pressure and cavitation damage of the rod-containing cavity are avoided; part of oil flows to the energy accumulator through the valve block, specifically, flows to the energy accumulator through two parallel damping holes in the valve block, wherein one damping hole is controlled through the switch valve, and 2-level damping is adjustable. If the switch valve is closed, the oil can flow to the energy accumulator only through one normally-open damping hole to realize large damping, if the switch valve is opened, the oil can flow to the energy accumulator through two parallel damping holes to realize small damping, and when the oil runs, larger impact is encountered, the pressure in the oil cylinder exceeds the set pressure of the relief valve, and the relief valve is opened to avoid the damage of the oil cylinder due to the overlarge pressure.
If the straight-line driving road section meets the road pit, the suspension stretches, part of oil in the rod cavity flows to the rodless cavity through the switch valve, in addition, part of oil in the energy accumulator flows to the rodless cavity through the valve block, specifically, the oil flows to the rodless cavity through the one-way valve, the flowing process is undamped, and negative pressure and cavitation damage of the rodless cavity are avoided.
The vehicle turns to the side, the outside suspension rises, the inside suspension lowers, the vehicle body rotates around the central axis, the outside suspension rises, a first proportional valve and a zero leakage valve which are connected with an outside suspension cylinder are opened, a reversing valve is communicated with a power source (a high-pressure oil pump), the controller can calculate and control the opening degree of the first proportional valve through the speed, the turning angle, the vehicle body side-rolling angle and the suspension displacement, the length and the speed of the suspension stretching are accurately controlled, high-pressure oil from the power source flows into a rodless cavity of the outside suspension cylinder through the first proportional valve, meanwhile, a switching valve between the rod cavity and the rodless cavity is opened, and part of oil in the rod cavity enters the rodless cavity; the inner side suspension is reduced, a first proportional valve and a zero leakage valve connected with an inner side suspension cylinder are opened, the reversing valve oil tank is communicated, part of oil in the rodless cavity enters the oil tank (low-pressure oil tank) through the first proportional valve, part of oil in the rodless cavity flows into the rod cavity, and the controller can calculate and control the opening of the first proportional valve through the speed, the steering angle, the body roll angle and the suspension displacement, so that the height and the speed of suspension reduction are accurately controlled. The suspension system inclines towards the same direction of steering, so that the gravity of the vehicle counteracts the centrifugal inertia force during steering, the rollover threshold of the vehicle is improved, and the running stability and the driving pleasure are improved.
Under the static working condition of the vehicle, a switching valve between a rod cavity and a rodless cavity which are communicated with the suspension oil cylinder is closed, the oil is incompressible, the suspension oil cylinder is specially locked, the vehicle body of a small-sized vehicle provided with the suspension system is kept horizontal in a static state, the vehicle body cannot shake left and right, and the vehicle is prevented from tilting due to excessive load.
Example 4
An automatic roll automotive suspension system comprising: suspension cylinder 1, accumulator 2, power source 3, oil tank 4, first proportional valve 5, zero leakage valve 6, reversing valve 7, and controller (not shown). A switching valve 8 and a valve assembly 14 which are connected in series are connected between the rod cavity and the rodless cavity of the suspension cylinder 1; the valve assembly 14 comprises a check valve 10, a damping hole 11, a switching valve 8 and a damping hole 11 connected in series, wherein the check valve only allows oil to flow from a rodless cavity to a rod cavity, two damping holes in the valve assembly are connected in parallel, one damping hole is controlled by the switching valve to realize 2-level damping adjustment, in the stretching stroke, if the switching valve connected in series with the damping hole is closed, the oil can only flow from one normally-open damping hole to the rodless cavity to realize large damping, and if the switching valve connected in series with the damping hole is opened, the oil can flow to the rodless cavity through the two parallel damping holes to realize small damping.
The bottom of the suspension cylinder is provided with an overload protection 15, and a rod cavity is provided with a pressure sensor 16.
The oil port of the energy accumulator 2 is connected with the rodless cavity of the suspension cylinder 1 through a valve block 9. Wherein the valve block 9 comprises a check valve 10 and a damping hole 11, a relief valve 12 and a second proportional valve 13 which are connected in parallel.
The power source 3 is connected with the oil tank 4, wherein the output end of the power source 3 and the input end of the oil tank 4 are respectively connected with the reversing valve 7, the zero leakage valve 6 and the first proportional valve 5 in series, and are connected with the rodless cavity of the suspension oil cylinder 1. The reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve on one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve on one side of the suspension cylinder in a compression state is communicated with the power source.
The suspension system of this embodiment operates on the principle that:
the vehicle normally runs on a horizontal straight road surface, a switching valve (positioned at the lower part of a one-way valve) which is communicated with a rod cavity and a rodless cavity of the suspension cylinder is opened, the rod cavity is communicated with oil in the rodless cavity, and the rodless cavity bears the load of the vehicle and the pressure load of the rod cavity.
If the straight-line driving road section encounters the road bulge, the suspension compresses, part of oil liquid in the rodless cavity flows to the rod-containing cavity through the switch valve (positioned at the lower part of the one-way valve) and the one-way valve, the part of oil liquid flow is not damped, negative pressure and cavitation damage of the rod-containing cavity are avoided, part of oil liquid flows to the energy accumulator through the valve block, and flows to the energy accumulator through the one-way valve, the damping hole and the second proportional valve in the valve block, wherein, as the one-way valve is opened, the damping is small, the second proportional valve controls compression damping in real time through adjusting the opening degree, so that the vehicle achieves optimal damping under all working conditions, and vibration is effectively attenuated.
If the straight-line driving road section meets a road pit, the suspension stretches, part of oil in the rod cavity flows to the rodless cavity through two parallel damping holes and a switching valve (positioned below the one-way valve), wherein the two damping holes are connected in parallel, one damping hole is controlled by the switching valve, 2-level damping is adjustable, if the switching valve is closed, the oil can only flow to the rodless cavity from one normally-open damping hole, large damping is realized, and if the switching valve is opened, the oil can flow to the rodless cavity through the two parallel damping holes, and small damping is realized; in addition, part of oil in the energy accumulator flows to the rodless cavity through the valve block, specifically flows to the rodless cavity through the second proportional valve, and the stretching damping is controlled in real time by adjusting the opening degree of the proportional valve, so that the damping of the vehicle is optimal under all working conditions, and vibration is effectively attenuated. Although the damping of the oil flowing from the accumulator to the rodless cavity is larger, the extension speed of the general vehicle suspension is smaller than the compression speed, and the size of the damping hole can be reasonably designed according to the movement speed of the piston of the suspension cylinder so as to avoid cavitation damage in the rodless cavity.
The vehicle turns to the side, the outside suspension rises, the inside suspension lowers, the vehicle body rotates around the central axis, the outside suspension rises, a first proportional valve and a zero leakage valve which are connected with an outside suspension cylinder are opened, a reversing valve is communicated with a power source (a high-pressure oil pump), the controller can calculate and control the opening degree of the first proportional valve through the speed, the turning angle, the vehicle body side-rolling angle and the suspension displacement, the length and the speed of the suspension stretching are accurately controlled, high-pressure oil from the power source flows into a rodless cavity of the outside suspension cylinder through the first proportional valve, meanwhile, a switching valve (positioned below the one-way valve) between the rod cavity and the rodless cavity is opened, the switching valve which is connected with a damping hole in series in the valve assembly is opened, and part of oil in the rod cavity enters the rodless cavity; the inner side suspension is reduced, a first proportional valve and a zero leakage valve connected with an inner side suspension cylinder are opened, the reversing valve oil tank is communicated, part of oil in the rodless cavity enters the oil tank (low-pressure oil tank) through the first proportional valve, part of oil in the rodless cavity flows into the rod cavity, the opening degree of the first proportional valve can be calculated and controlled through the speed, the steering angle, the body roll angle and the suspension displacement by the controller, the height and the speed of the suspension are accurately controlled, the suspension system is inclined towards the same steering direction, the gravity of the vehicle counteracts the centrifugal inertia force during steering, the vehicle rollover threshold value is improved, and the running stability and the driving fun are increased.
Under the static working condition of the vehicle, a switching valve between a rod cavity and a rodless cavity which are communicated with the suspension oil cylinder is closed, the oil is incompressible, the suspension oil cylinder is specially locked, the vehicle body of a small-sized vehicle provided with the suspension system is kept horizontal in a static state, the vehicle body cannot shake left and right, and the vehicle is prevented from tilting due to excessive load.
The invention has the following characteristics:
firstly, through the connection mode between the rod cavity and the rodless cavity of the suspension cylinder and the connection mode between the rodless cavity and the energy accumulator, variable damping can be provided under the state that the suspension is compressed and stretched, optimal damping is provided for a vehicle under different road surfaces and running working conditions, riding comfort of the vehicle is greatly provided, and cavitation damage of the cylinder is avoided. In addition, the proportional valve is used, and in the compression and extension stages of the suspension cylinder, real-time variable optimal damping can be respectively provided through one valve block (comprising the proportional valve, the switch valve, the one-way valve and the like), so that the system structure is greatly simplified, and the riding comfort of the suspension system is improved.
The left suspension cylinder and the right suspension cylinder are quickly and accurately adjusted to move up and down under the action of a high-pressure oil power source ready at any time through the proportional valve, the non-leakage valve and the like to realize automatic rolling of a vehicle body, so that the stability of the vehicle in steering running is improved, meanwhile, the stability of the oil pressure in the suspension cylinders is kept when the vehicle does not need to roll, the problems of sinking of the vehicle body and the like caused by leakage are avoided, the structure is simple, the post-measurement cost is low, and the performance is reliable.
And thirdly, a switching valve between a rod cavity and a rodless cavity of the suspension cylinder is closed when the vehicle is stopped, and the combination of the zero leakage valve can keep the stability of the body of the small-sized vehicle, prevent the body from tilting when passengers get on or get off or bear larger unbalanced load, namely, the vehicle has a parking locking function and ensures the stability of the small-sized vehicle.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (3)
1. An automatic roll automotive suspension system comprising: the device comprises a suspension oil cylinder, an energy accumulator, a power source, an oil tank, a first proportional valve, a zero leakage valve, a reversing valve and a controller; a switch valve is connected between the rod cavity and the rodless cavity of the suspension cylinder; an oil port of the energy accumulator is connected with a rodless cavity of the suspension oil cylinder through a valve block; the power source is connected with the oil tank, wherein the output end of the power source and the input end of the oil tank are respectively connected with the reversing valve, the zero leakage valve and the first proportional valve in series and are connected with the rodless cavity of the suspension oil cylinder; the reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve at one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve at one side of the suspension cylinder in a compression state is communicated with the power source; a valve assembly connected in series with the switch valve is also connected between the rod cavity and the rodless cavity of the suspension cylinder; the valve assembly comprises a one-way valve, a damping hole, a switching valve and a damping hole which are connected in series; the valve block comprises a load release valve, a second proportional valve, a one-way valve and a damping hole connected in series with the load release valve, the second proportional valve and the one-way valve which are connected in parallel; and a pressure sensor is arranged in a rod cavity of the suspension cylinder.
2. An automatic roll automotive suspension system comprising: the device comprises a suspension oil cylinder, an energy accumulator, a power source, an oil tank, a first proportional valve, a zero leakage valve, a reversing valve and a controller; a switch valve is connected between the rod cavity and the rodless cavity of the suspension cylinder; an oil port of the energy accumulator is connected with a rodless cavity of the suspension oil cylinder through a valve block; the power source is connected with the oil tank, wherein the output end of the power source and the input end of the oil tank are respectively connected with the reversing valve, the zero leakage valve and the first proportional valve in series and are connected with the rodless cavity of the suspension oil cylinder; the reversing valve is a two-position three-way valve, when the vehicle body is in a steering state, the reversing valve at one side of the suspension cylinder in a stretching state is communicated with the oil tank, and the reversing valve at one side of the suspension cylinder in a compression state is communicated with the power source; a valve assembly connected in series with the switch valve is also connected between the rod cavity and the rodless cavity of the suspension cylinder; the valve assembly comprises a one-way valve, a damping hole, a switching valve and a damping hole which are connected in series; the valve block comprises a one-way valve, a damping hole, a load-discharging valve, a switch valve and a damping hole which are connected in series with the valve block; and a pressure sensor is arranged in a rod cavity of the suspension cylinder.
3. An automatic roll automotive suspension system according to claim 1 or 2, characterized in that the bottom of the suspension cylinder is provided with overload protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710347655.XA CN107284174B (en) | 2017-05-17 | 2017-05-17 | Automatic side-tipping automobile suspension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710347655.XA CN107284174B (en) | 2017-05-17 | 2017-05-17 | Automatic side-tipping automobile suspension system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107284174A CN107284174A (en) | 2017-10-24 |
| CN107284174B true CN107284174B (en) | 2023-05-23 |
Family
ID=60093980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710347655.XA Active CN107284174B (en) | 2017-05-17 | 2017-05-17 | Automatic side-tipping automobile suspension system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107284174B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109703314A (en) * | 2017-10-26 | 2019-05-03 | 郑州宇通客车股份有限公司 | The vehicle and its suspension system that anti-side is turned over |
| CN109624636B (en) * | 2018-12-12 | 2020-11-17 | 中联重科股份有限公司 | Oil gas suspension system and vehicle |
| CN113085467B (en) * | 2021-04-15 | 2023-01-06 | 安徽华菱汽车有限公司 | Automobile, suspension and anti-roll device |
| CN113928074B (en) * | 2021-11-26 | 2023-06-02 | 广东汇天航空航天科技有限公司 | Suspension system, aerocar, method and device for controlling aerocar |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3443183A1 (en) * | 1984-11-27 | 1986-05-28 | Robert Bosch Gmbh, 7000 Stuttgart | METHOD AND DEVICE FOR CONTROLLING THE SHOCK ABSORBER OF A SHOCK ABSORBER FOR VEHICLES |
| CN2811043Y (en) * | 2005-06-24 | 2006-08-30 | 浙江大学 | Damp active adjustable hydraulic vibration reducer for automobiles semi-active suspension |
| CN104401198B (en) * | 2014-09-23 | 2016-10-05 | 东北农业大学 | Hydraulic vehicle active suspension system |
| CN106394159B (en) * | 2016-10-25 | 2018-12-21 | 张家口舒狮汽车科技有限公司 | Vehicle suspension and vehicle |
| CN206938377U (en) * | 2017-05-17 | 2018-01-30 | 苏州舒狮汽车科技有限公司 | A kind of automatic roll automobile suspension system |
-
2017
- 2017-05-17 CN CN201710347655.XA patent/CN107284174B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107284174A (en) | 2017-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107284174B (en) | Automatic side-tipping automobile suspension system | |
| CN102596697B (en) | Tilt control for tilting vehicles | |
| RU2268160C2 (en) | Amphibian | |
| CN107379910B (en) | Hydro-pneumatic suspension hydraulic system | |
| CN109624636B (en) | Oil gas suspension system and vehicle | |
| CN107116985B (en) | Large-stroke suspension system for multi-axle heavy vehicle | |
| RU166778U1 (en) | HYDRO-PNEUMATIC SUSPENSION OF A VEHICLE | |
| CN103863050A (en) | Vehicle suspension system and motor vehicle | |
| CN103879260B (en) | Vehicle suspension system and motor vehicles | |
| CN203920324U (en) | Vehicle suspension system and self-propelled vehicle | |
| CN205009910U (en) | Anti hydraulic system that heels, leans forward of initiative | |
| CN106394159A (en) | Vehicle suspension frame and vehicle | |
| CN205170223U (en) | Full ground hoist chassis hang hydraulic control system | |
| WO2020157664A1 (en) | Hydropneumatic system for controlling the tilting of two wheels of a vehicle and a vehicle equipped with said system | |
| CN105346351A (en) | Control device for inhibiting automobile side turning and control method for inhibiting automobile side turning | |
| CN206938377U (en) | A kind of automatic roll automobile suspension system | |
| CN206841113U (en) | Hydro pneumatic suspension bidirectional hydraulic blocking device | |
| CN210343903U (en) | Active control valve group of thrust wheel and thrust wheel system | |
| CN110847278B (en) | Loader vibration damper | |
| CN110722955A (en) | Vehicle and stabilizer bar system thereof | |
| KR102416935B1 (en) | Active suspension system for vehicle | |
| CN110683484B (en) | Vibration damper for telescopic arm forklift | |
| CN110878777B (en) | Pressure control valve | |
| RU2149106C1 (en) | Combination suspension | |
| CN110847279B (en) | Loader buffer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231214 Address after: Room 422, 4th Floor, Building B, Building 1, Zhongke Innovation Plaza, Huaqiao Town, Kunshan City, Suzhou City, Jiangsu Province, 215332 Patentee after: Suzhou Kunlong New Energy Technology Co.,Ltd. Address before: No. 333, Southeast Avenue, High tech Industrial Development Zone, Changshu City, Suzhou City, Jiangsu Province, 215500, 201 Patentee before: SUZHOU SHUSHI AUTOMOBILE TECHNOLOGY CO.,LTD. |
|
| TR01 | Transfer of patent right |