CN109703316B - High, medium and low three-level composite quick response suspension device - Google Patents
High, medium and low three-level composite quick response suspension device Download PDFInfo
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- CN109703316B CN109703316B CN201910067812.0A CN201910067812A CN109703316B CN 109703316 B CN109703316 B CN 109703316B CN 201910067812 A CN201910067812 A CN 201910067812A CN 109703316 B CN109703316 B CN 109703316B
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Abstract
The invention relates to the field of suspension devices of vehicles, in particular to a high-level, middle-level and low-level composite quick response suspension device. Hydraulic oil is filled in each hydraulic cylinder rodless cavity, a distance sensor is installed on each hydraulic cylinder, a four-way connector is installed in each hydraulic cylinder rodless cavity, one of the four-way connectors is communicated with the corresponding hydraulic cylinder rodless cavity, a low-pressure electromagnetic valve, a medium-pressure electromagnetic valve and a high-pressure electromagnetic valve are installed on the other three-way pipes of each four-way connector, all the low-pressure electromagnetic valves are communicated with the outside air, all the medium-pressure electromagnetic valves are connected to a medium-pressure pipeline together, and all the high-pressure electromagnetic valves are connected to a high-pressure pipeline together. The invention adopts a high, medium and low three-stage air pressure pipeline compound mode, and realizes quick air release from high pressure to medium pressure and from medium pressure to low pressure through pressure difference so as to solve the problem of actively controlling the response speed of air suspension.
Description
Technical Field
The invention relates to the field of suspension devices of vehicles, in particular to a high-level, middle-level and low-level composite quick response suspension device.
Background
The automobile suspension in the current market mostly adopts air suspension to keep the automobile body stable and increase driving comfort. The air suspension has the advantages that the air suspension can be used as an air spring for damping, the mass center of the vehicle can be reduced, the driving stability can be improved, the mass center of the vehicle can be increased, and the off-road capability of the vehicle can be improved. Although the advantages are obvious, certain defects exist, the air suspension on the market can meet the regulation speed of the vehicle running on a common road surface, and the regulation capability of the vehicle running on a cross-country road surface at a high speed is obviously insufficient.
Analysis from the principle, air suspension on the market mainly comprises middling pressure and low pressure two-stage atmospheric pressure, opens the middling pressure valve when needing to aerify, opens the bleed valve door when needing to lose heart and lets gas escape to the atmosphere or through recovery unit recovery. Aiming at the problem of quick response of suspension, the invention provides a technology innovation of high, medium and low pressure three-stage composite quick response suspension to improve the response speed of air suspension so as to meet the trafficability and stability of vehicles running on complex road conditions.
Disclosure of Invention
The invention provides a high-level, medium-level and low-level composite quick response suspension device for solving the problem of adaptability of the existing mobile platform to complex road conditions.
The invention is realized by the following technical scheme: a high, middle and low three-level composite quick response suspension device comprises a plurality of hydraulic cylinders, piston rods matched with the insides of cylinder bodies of the hydraulic cylinders, a controller,
every pneumatic cylinder rodless intracavity all is filled with hydraulic oil, all installs distance sensor on every pneumatic cylinder, and four-way connection ware is all installed in every pneumatic cylinder rodless chamber, and one of them logical of every four-way connection ware is linked together with corresponding pneumatic cylinder rodless chamber respectively, equally divide on other tee joints of every four-way connection ware and do not install low pressure solenoid valve, middling pressure solenoid valve and high pressure solenoid valve, and all low pressure solenoid valves are linked together with the outside air, and all middling pressure solenoid valves are connected in the middling pressure pipeline jointly, and all high pressure solenoid valves are connected on high pressure pipeline jointly, the both ends of middling pressure pipeline are enclosed construction, high pressure pipeline's one end is linked together for enclosed construction and other end and the high-pressure gas cylinder that has the switch.
As a further improvement of the technical scheme of the invention, a hydraulic oil splash cover is arranged between the hydraulic oil and the compressed air in the rodless cavity of the hydraulic cylinder, and a sealing ring in interference fit with the inner wall of the rodless cavity of the hydraulic cylinder is arranged at the edge of the hydraulic oil splash cover.
The invention further provides a vehicle comprising the high, medium and low three-level composite quick response suspension device.
As a further improvement of the technical scheme of the vehicle, the end parts of rodless cavities of all hydraulic cylinders are supported below a vehicle bottom plate, the end parts of all piston rods are rotatably connected with wheels, and the distance sensor is positioned on one side in front of the hydraulic cylinders.
The invention has the beneficial effects that:
(1) compared with the traditional air suspension which adopts the easily damaged material of the air bag, the invention adopts the hydraulic cylinder as the air chamber, and the durability of the material is improved;
(2) according to the invention, a certain amount of hydraulic oil is added into the hydraulic cylinder to serve as an auxiliary sealing material, so that the complex structure increased for air tightness can be effectively reduced;
(3) the invention adopts a high, medium and low three-stage air pressure pipeline compound mode, and realizes quick air release from high pressure to medium pressure and from medium pressure to low pressure through pressure difference so as to solve the problem of actively controlling the response speed of air suspension.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hydraulic cylinder in a high-medium-low three-stage composite quick response suspension device.
Fig. 2 is a schematic structural diagram of a high, medium and low three-level composite quick response suspension device according to the present invention.
Fig. 3 is a front view of the vehicle when passing through a rough road.
FIG. 4 is a schematic diagram of the operation of a vehicle traversing a steep grade.
In the figure: the device comprises a high-pressure pipeline 1, a vehicle wheel 2, a high-pressure gas cylinder 3, a distance sensor 4, an air compressor 5, a piston rod 6, a hydraulic cylinder 7, hydraulic oil 8, compressed air 9, a four-way connector 10, a high-pressure electromagnetic valve 11, a medium-pressure electromagnetic valve 12, a low-pressure electromagnetic valve 13, a hydraulic hose 14, a hydraulic oil anti-splash cover 15 and a medium-pressure pipeline 16.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
A high, middle and low three-level composite quick response suspension device comprises a plurality of hydraulic cylinders 7, piston rods 6 matched with the insides of cylinder bodies of the hydraulic cylinders 7, a controller,
every pneumatic cylinder 7 does not have the pole intracavity and all fills and to have hydraulic oil 8, all installs distance sensor 4 on every pneumatic cylinder 7, and four-way connector 10 is all installed in every pneumatic cylinder 7 does not have the pole chamber, and one of them logical of every four-way connector 10 is linked together with corresponding pneumatic cylinder 7 does not have the pole chamber respectively, equally divide on other tee joints of every four-way connector 10 and do not install low pressure solenoid valve 13, medium pressure solenoid valve 12 and high pressure solenoid valve 11, and all low pressure solenoid valves 13 are linked together with the outside air, and all medium pressure solenoid valves 12 are connected in medium pressure pipeline 16 jointly, and all high pressure solenoid valves 11 are connected on high pressure pipeline 1 jointly, the both ends of medium pressure pipeline 16 are enclosed construction, the one end of high pressure pipeline 1 is linked together for enclosed construction and the other end and high pressure gas cylinder 3 that has the switch.
In order to avoid in the use, in partial hydraulic oil 8 got into four-way connection ware 10 and then got into the solenoid valve, be equipped with hydraulic oil splashproof lid 15 between the hydraulic oil 8 and the compressed air 9 in the no pole chamber of pneumatic cylinder 7, the edge of hydraulic oil splashproof lid 15 be equipped with the no pole intracavity wall interference fit's of pneumatic cylinder 7 sealing washer. In specific implementation, the four-way connector 10 is connected with each solenoid valve through a hydraulic hose 14. When the hydraulic oil splash cover is used specifically, the hydraulic oil splash cover 15 can slide up and down along the inner wall of the rodless cavity of the hydraulic cylinder 7 under the action of hydraulic oil 8 and compressed air 9.
The invention further provides a vehicle comprising the high, medium and low three-level composite quick response suspension device.
During specific implementation, the end parts of the rodless cavities of all the hydraulic cylinders 7 are supported below a vehicle bottom plate, the end parts of all the piston rods 6 are rotatably connected with wheels 2, and the distance sensor 4 is positioned on one side in front of the hydraulic cylinders 7 (the direction is consistent with the running direction of a vehicle).
In the invention, the controller is used for realizing intelligent control management of each electromagnetic valve and the high-pressure gas cylinder 3 and the air compressor 5 according to the real-time information of the distance sensor 4. In particular, all the hydraulic cylinders 7 and the piston rods 6 have the same specification (i.e., the same structure and dimensions). In the present invention, the specific operation of the wheel 2 is common knowledge in the art, and since the object of the present invention is to provide a hydraulic suspension device, the operation of the wheel 2 will not be described in detail.
The invention further provides a control method for the high, medium and low three-level composite quick response suspension of the vehicle, which adopts the vehicle and comprises the following steps: the distance sensor 4 transmits the distance information from the ground to the hydraulic cylinder 7 to the controller in real time, the controller controls the amount of compressed air 9 in a rodless cavity of the hydraulic cylinder 7, so that the expansion and contraction of each piston rod 6 are controlled, and the piston rods 6 operate according to the expansion of a groove road surface, the contraction of a convex road surface and the middle position of a flat road surface.
In the invention, the distance sensor 4 transmits the information of the road condition of the wheel 2 to the controller in real time, and the controller judges whether the road surface has concave-convex condition; further, whether the road surface has concave-convex conditions or not is judged by adopting a distance sensor 4 (an ultrasonic ranging sensor, an infrared ranging sensor, a laser ranging sensor, a radar ranging sensor and the like), and also can adopt a visual sensor such as a camera and other sensors capable of identifying the concave-convex conditions of the road surface, the sensors provide information input of the road surface conditions for a controller, the road surface identification technology of the unmanned vehicles is well known in the field, and the purpose of the invention is to provide a hydraulic suspension device, so the specific sensors and the working mode of identifying the concave-convex conditions of the road surface are not repeated.
The control method for the high, middle and low three-level composite quick response suspension of the vehicle comprises the following specific steps:
(1) under the general conditions:
when the vehicle runs on a flat road, the medium-pressure electromagnetic valve 12 is opened, the high-pressure electromagnetic valve 11 and the low-pressure electromagnetic valve 13 are closed, and at the moment, the rodless cavity of each hydraulic cylinder 7 is communicated with the medium-pressure pipeline 16 to form a communicating vessel, so that the vehicle is equivalently suspended on medium-pressure gas. When a small-amplitude bulge is encountered, the bulge jacks up the piston rod 6, namely the compressed air 9 is compressed to the medium-pressure pipeline 16, the height of the vehicle body is unchanged, and the damping effect is achieved; when a small depression is encountered, the piston rod 6 will move downwards due to the dual action of gravity and compressed air 9 so that the supporting force of the wheel with the ground is not reduced, i.e. the power of the wheel is not lost.
(2) In off-road situations (as shown in fig. 3):
① the piston rod 6 extends on the groove road, the distance sensor 4 transmits the distance information from the front ground to the hydraulic cylinder 7 to the controller in real time, then the corresponding medium pressure electromagnetic valve 12 and low pressure electromagnetic valve 13 are selected to close, the high pressure electromagnetic valve 11 and the high pressure gas cylinder 3 are opened, the high pressure gas cylinder 3 fills the corresponding compressed air 9 into the rodless cavity of the hydraulic cylinder 7 according to the distance information, the piston rod 6 is pushed to extend under the combined action of the compressed air 9 and gravity until the wheels 2 are matched with the groove road in a rolling way, the adhesive force and the friction force when the wheels pass the pit are improved, the switch of the high pressure gas cylinder 3 is closed, and the stability of the vehicle is kept.
② piston rod 6 retracts on the convex road surface, distance sensor 4 transmits the distance information from the front ground to hydraulic cylinder 7 to the controller in real time, then selects to close corresponding medium pressure electromagnetic valve 12 and high pressure electromagnetic valve 11, opens low pressure electromagnetic valve 13, according to the distance information, low pressure electromagnetic valve 13 discharges the corresponding amount of compressed air 9 in the rodless cavity of hydraulic cylinder 7 to the atmosphere, piston rod 6 retracts to make wheel 2 roll and match with the convex road surface, then closes low pressure electromagnetic valve 13, keeps the vehicle passing the convex road surface smoothly.
(3) In a steep slope situation (as shown in fig. 4):
because the invention adopts the compressed air 9 to control the expansion and contraction of the piston rod 6, the excessive compression of the air in front of the wheel 2 can cause the front of the vehicle to bump into a steep slope when the vehicle ascends the slope at full speed. When the vehicle passes through a steep slope in a manual mode or an automatic mode, the high-pressure electromagnetic valve 11 on the front wheel 2 is opened, the medium-pressure electromagnetic valve 12 and the low-pressure electromagnetic valve 13 are closed, so that the piston rod 6 in the hydraulic cylinder 7 on the front wheel 2 cannot move upwards, the vehicle cannot collide with the slope, meanwhile, the middle wheel 2 is suspended due to the inclination of the vehicle body, in order to increase the ground adhesion of the wheel 2, the high-pressure electromagnetic valve 11 of the corresponding middle wheel is opened immediately after the suspension of the tire is detected by the distance sensor 4 on the middle wheel, and the medium-pressure electromagnetic valve 12 and the low-pressure electromagnetic valve 13 are closed, so that the.
In order to ensure the response speed of air suspension of a vehicle in high-speed running, the method is realized by firstly installing a pressure sensor in the high-pressure air bottle 3 in order to ensure the pressure of the high-pressure air bottle 3, starting the air compressor 5 if the pressure in the high-pressure air bottle 3 is lower than a preset value, stopping the operation of the air compressor 5 when the pressure in the high-pressure air bottle 3 reaches the preset value, and then closing the switch of the high-pressure air bottle 3. Because under complicated road conditions, compressed air 9 is discharged to the atmosphere, so in order to ensure the pressure in the medium-pressure pipeline 16, the low-pressure electromagnetic valve 13 can be closed under ordinary conditions, the high-pressure electromagnetic valve 11, the high-pressure gas cylinder 3 and the medium-pressure electromagnetic valve 12 are opened at the same time, the high-pressure gas in the high-pressure gas cylinder 3 enters the medium-pressure pipeline 16 through the rodless cavity of the hydraulic cylinder 7, and the high-pressure electromagnetic valve 11 and the high-pressure gas cylinder 3 are closed after the preset value is reached.
By analyzing the fact that the air quantity discharged in the air discharging process is smaller than the air quantity charged in the non-air discharging process of the air compressor 5 in the whole running process of the vehicle, the vehicle can normally work, so that the air supply device can work on a normal road surface for a long time, work on a special road condition for a short time, or work on the normal road surface and the special road condition alternately to ensure the sufficient air supply quantity.
Given the application of the invention to high pressure gas supply, a general feasibility analysis is given as well as the specific model and performance parameters of some specific components. (1) Low pressure refers to atmospheric pressure, known as standard atmospheric pressure of 0.1 MPa; (2) the pressure value of the medium-pressure pipeline 16 is specifically calculated according to the specific vehicle weight, the number of the hydraulic cylinders 7 and the force bearing area of the piston rods, and the calculation standard is that the resultant force of medium-pressure gas acting on all the piston rods 6 is balanced with the vehicle body weight. Taking a common household car as an example to calculate and obtain a specific medium-pressure value, wherein the weight of the general four-wheel car is 2 tons, four standard hydraulic cylinders with the inner diameter of 45mm are arranged (the hydraulic cylinders can bear 60MPa of pressure intensity), and the car body can be supported by calculating the pressure intensity of about 5MPa required by the medium-pressure pipeline 16; (3) theoretically, the piston rod 6 can be pushed to move downwards to lift the whole vehicle body by the fact that the gas pressure value in the high-pressure gas cylinder 3 is larger than the medium-pressure value, but in order to meet the requirement of quick response, the gas pressure in the high-pressure gas cylinder 3 is set to be 30Mpa, and therefore an industrial-grade air compressor 5 (such as a Bailey high-pressure compressor BW300 high-pressure air compressor) is selected. The pressure intensity of high-pressure gas in the high-pressure gas bottle 3 and compressed air in the hydraulic cylinder 7 after the vehicle body is impacted is very high, so that an industrial special high-pressure-resistant normally-closed electromagnetic valve (which can stably work under the pressure intensity of 100MPa and can refer to Chongqing Ming electromagnetic valve-ZCFK 51-DHBXS in detail) can be selected.
It is of course possible to determine the pressure in the medium pressure pipe 16 or the high pressure pipe 1 according to the weight of the actual vehicle and the number and type of the hydraulic cylinders 7, i.e. the aforementioned 5MPa and 30MPa are only suitable for the aforementioned vehicle use, and in the present invention the pressure in the medium pressure pipe 16 is greater than the atmospheric pressure and the pressure in the high pressure pipe 1 is greater than the pressure in the medium pressure pipe 16.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (1)
1. A high, medium and low three-level composite quick response suspension device is characterized by comprising a plurality of hydraulic cylinders (7), piston rods (6) matched with the insides of cylinder bodies of the hydraulic cylinders (7), a controller,
hydraulic oil (8) is filled in a rodless cavity of each hydraulic cylinder (7), a distance sensor (4) is installed on each hydraulic cylinder (7), a four-way connector (10) is installed on the rodless cavity of each hydraulic cylinder (7), one of the three-way connectors (10) is respectively communicated with the rodless cavity of the corresponding hydraulic cylinder (7), other three-way connectors of each four-way connector (10) are respectively provided with a low-pressure electromagnetic valve (13), a medium-pressure electromagnetic valve (12) and a high-pressure electromagnetic valve (11), all the low-pressure electromagnetic valves (13) are communicated with the outside air, all the medium-pressure electromagnetic valves (12) are connected to a medium-pressure pipeline (16), all the high-pressure electromagnetic valves (11) are connected to a high-pressure pipeline (1), both ends of the medium-pressure pipeline (16) are of a closed structure, one end of the high-pressure pipeline (1) is of a closed structure, and the other end of, an air compressor (5) is installed on the high-pressure pipeline (1); the end parts of rodless cavities of all hydraulic cylinders (7) are supported below a vehicle bottom plate, the end parts of all piston rods (6) are rotatably connected with wheels (2), and the distance sensor (4) is positioned on one side in front of the hydraulic cylinders (7);
the control method of the suspension device comprises the following steps: the distance sensor (4) transmits the distance information from the ground to the hydraulic cylinder (7) to the controller in real time, the controller controls the amount of compressed air (9) in a rodless cavity of the hydraulic cylinder (7) so as to control the extension and retraction of each piston rod (6), and the piston rods (6) operate according to the extension of a groove road surface, the contraction of a convex road surface and the middle position of a flat road surface;
the control method of the suspension device further includes:
scattered under the general condition:
when the vehicle runs on a flat road, the medium-pressure electromagnetic valve (12) is opened, the high-pressure electromagnetic valve (11) and the low-pressure electromagnetic valve (13) are closed, and at the moment, the rodless cavity of each hydraulic cylinder (7) is communicated with the medium-pressure pipeline (16) to form a communicating vessel, so that the vehicle is equivalent to be suspended on medium-pressure gas;
waste rock is in off-road conditions:
① the piston rod (6) extends on the groove road, the distance sensor (4) transmits the distance information from the front ground to the hydraulic cylinder (7) to the controller in real time, then the corresponding medium pressure solenoid valve (12) and the low pressure solenoid valve (13) are selected to be closed, the high pressure solenoid valve (11) and the high pressure gas cylinder (3) are opened, the high pressure gas cylinder (3) fills the corresponding compressed air (9) into the rodless cavity of the hydraulic cylinder (7) according to the distance information, the piston rod (6) is pushed to extend under the combined action of the compressed air (9) and gravity until the wheel (2) is in rolling fit with the groove road, the switch of the high pressure gas cylinder (3) is closed, and the stability of the vehicle is kept;
② piston rod (6) retracts on the convex road surface, the distance sensor (4) transmits the distance information from the front ground to the hydraulic cylinder (7) to the controller in real time, then selects to close the corresponding medium pressure electromagnetic valve (12) and high pressure electromagnetic valve (11), opens the low pressure electromagnetic valve (13), according to the distance information, the low pressure electromagnetic valve (13) discharges the corresponding amount of compressed air (9) in the rod-free cavity of the hydraulic cylinder (7) to the atmosphere, the piston rod (6) retracts to make the wheel (2) and the convex road surface roll and cooperate, then closes the low pressure electromagnetic valve (13), keeps the vehicle passing the convex road surface smoothly;
⑴ in case of steep slopes:
when passing through a steep slope, a high-pressure electromagnetic valve (11) on the front wheel (2) is opened, a medium-pressure electromagnetic valve (12) and a low-pressure electromagnetic valve (13) are closed, so that a piston rod (6) in a hydraulic cylinder (7) on the front wheel (2) cannot move upwards, the vehicle cannot collide with the slope, meanwhile, the middle wheel (2) is suspended due to the inclination of the vehicle body, in order to increase the ground adhesion of the wheel (2), the high-pressure electromagnetic valve (11) of the corresponding middle wheel is opened immediately by detecting that a tire is suspended through a distance sensor (4) on the middle wheel, the medium-pressure electromagnetic valve (12) and the low-pressure electromagnetic valve (13) are closed, and compressed air (9) pushes the piston.
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| CN201910067812.0A CN109703316B (en) | 2019-01-24 | 2019-01-24 | High, medium and low three-level composite quick response suspension device |
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| CN201910067812.0A CN109703316B (en) | 2019-01-24 | 2019-01-24 | High, medium and low three-level composite quick response suspension device |
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| CN109703316A CN109703316A (en) | 2019-05-03 |
| CN109703316B true CN109703316B (en) | 2020-07-31 |
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| CN111536082A (en) * | 2020-04-28 | 2020-08-14 | 中车青岛四方车辆研究所有限公司 | Hydraulic control system of supporting wheel based on magnetic levitation vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080107171A (en) * | 2007-06-05 | 2008-12-10 | 현대자동차주식회사 | An electronic stability program for a vehicle |
| CN206201897U (en) * | 2016-09-26 | 2017-05-31 | 郑州宇通客车股份有限公司 | One kind is automatically controlled can on-off type airsuspension system, air spring and auxiliary chamber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7195250B2 (en) * | 2000-03-27 | 2007-03-27 | Bose Corporation | Surface vehicle vertical trajectory planning |
| CN103182916B (en) * | 2011-12-28 | 2016-11-02 | 长春孔辉汽车科技股份有限公司 | Multiple-axle vehicle hydro pneumatic suspension levelling device and method |
| AT514458B1 (en) * | 2013-06-20 | 2015-05-15 | Siemens Ag Oesterreich | Air suspension device for a rail vehicle |
| US9517674B2 (en) * | 2014-06-24 | 2016-12-13 | Hendrickson Usa, L.L.C. | Pneumatic control system for a heavy-duty vehicle |
| CN105351421A (en) * | 2015-11-19 | 2016-02-24 | 成都九十度工业产品设计有限公司 | Hydro-pneumatic suspension device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080107171A (en) * | 2007-06-05 | 2008-12-10 | 현대자동차주식회사 | An electronic stability program for a vehicle |
| CN206201897U (en) * | 2016-09-26 | 2017-05-31 | 郑州宇通客车股份有限公司 | One kind is automatically controlled can on-off type airsuspension system, air spring and auxiliary chamber |
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