CN115782499A - Multi-shaft suspension lifting hydraulic system, control method and automobile - Google Patents
Multi-shaft suspension lifting hydraulic system, control method and automobile Download PDFInfo
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- CN115782499A CN115782499A CN202211518836.1A CN202211518836A CN115782499A CN 115782499 A CN115782499 A CN 115782499A CN 202211518836 A CN202211518836 A CN 202211518836A CN 115782499 A CN115782499 A CN 115782499A
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Abstract
The invention relates to a multi-shaft suspension lifting hydraulic system, a control method and an automobile. In the application, a hydraulic oil tank is communicated with a hydraulic oil pump, the hydraulic oil pump is connected with a rear vehicle posture valve through two hydraulic oil paths, and is connected with a front vehicle posture valve through the other two hydraulic oil paths; the rear vehicle posture valve is respectively connected with the right rear manual locking valve and the left rear manual locking valve; the front vehicle attitude valve is respectively connected with a right front manual locking valve and a left front manual locking valve, wherein the right rear manual locking valve and the left rear manual locking valve are respectively connected with each rear axle hydro-pneumatic spring through hydraulic oil paths provided with the axle manual locking valve and the axle electric control locking valve, and the right front manual locking valve and the left front manual locking valve are respectively connected with each front axle hydro-pneumatic spring through hydraulic oil paths provided with the axle manual locking valve and the axle electric control locking valve. The front, rear, left and right independent hydraulic oil paths can conveniently adjust the front, rear, left and right heights; the height is adaptively adjusted according to the conditions of empty and heavy load, the comfort is good, and the reliability is high under the heavy load condition.
Description
Technical Field
The invention relates to the technical field of suspension lifting hydraulic systems, in particular to a multi-shaft suspension lifting hydraulic system, a control method and an automobile.
Background
Vehicles with adjustable suspension height are generally equipped with air suspensions. The air spring adopted by the air suspension has higher cost, and parts such as an inflating pump, an air compressor, an air storage cylinder and the like are added, so that the cost and the weight are increased. The air spring is mainly made of rubber materials which can age after a long time, so that the air spring can be replaced when the vehicle is used for 5-10 years under the common condition, and the use cost of a user is increased. The air spring is not beneficial to being used under severe working conditions for a long time, and fine sand and dust can enter the air spring to damage the air spring. And the air suspension system that present vehicle was equipped with can only the whole height-adjusting, can't be preceding, back, left and right independently adjustable height, has reduced user convenience.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the invention provides a multi-shaft suspension lifting hydraulic system, a control method and an automobile.
In a first aspect, the present invention provides a multi-axle suspension lifting hydraulic system, comprising: the hydraulic oil pump is connected with the rear vehicle posture valve through two hydraulic oil paths and is connected with the front vehicle posture valve through the other two hydraulic oil paths;
the rear vehicle posture valve is respectively connected with a right rear manual locking valve and a left rear manual locking valve; the front vehicle posture valve is respectively connected with a right front manual locking valve and a left front manual locking valve, wherein the right rear manual locking valve and the left rear manual locking valve are respectively connected with each rear axle hydro-pneumatic spring through hydraulic oil paths provided with the axle manual locking valve and the axle electric control locking valve, and the right front manual locking valve and the left front manual locking valve are respectively connected with each front axle hydro-pneumatic spring through hydraulic oil paths provided with the axle manual locking valve and the axle electric control locking valve;
and each two axles are provided with a pair of accumulators, and the accumulators are connected with axle manual locking valves on the corresponding two axles through hydraulic oil lines.
Furthermore, a filter is arranged at the oil outlet end of the hydraulic oil pump, the filter outputs four hydraulic oil paths, two paths of the filters are connected with the rear vehicle posture valve, and the other two paths of the filters are connected with the front vehicle posture valve.
Furthermore, the output of the right rear manual locking valve is divided into two hydraulic oil paths, one hydraulic oil path is connected with the combination of the three-bridge right manual locking valve, the three-bridge right electric control locking valve and the three-bridge right oil-gas spring, and is connected with the combination of the four-bridge right manual locking valve, the four-bridge right electric control locking valve and the four-bridge right oil-gas spring, the other hydraulic oil path is connected with the combination of the five-bridge right manual locking valve, the five-bridge right electric control locking valve and the five-bridge right oil-gas spring, and is connected with the combination of the six-bridge right manual locking valve, the six-bridge right electric control locking valve and the six-bridge right oil-gas spring.
Furthermore, right middle accumulators are correspondingly arranged on the right sides of the three bridge and the four bridge, and right rear accumulators are correspondingly arranged on the right sides of the five bridge and the six bridge, wherein the right middle accumulators are connected with hydraulic oil paths connected with the three-bridge right manual locking valve and the four-bridge right manual locking valve, and the right rear accumulators are connected with hydraulic oil paths connected with the five-bridge right manual locking valve and the six-bridge right manual locking valve.
Furthermore, the output of the left rear manual locking valve is divided into two hydraulic oil paths, one hydraulic oil path is connected with the combination of the three-bridge left-hand locking valve, the three-bridge left electric control locking valve and the three-bridge left oil-gas spring, and is connected with the combination of the four-bridge left-hand locking valve, the four-bridge left electric control locking valve and the four-bridge left oil-gas spring, the other hydraulic oil path is connected with the combination of the five-bridge left-hand locking valve, the five-bridge left electric control locking valve and the five-bridge left oil-gas spring, and is connected with the combination of the six-bridge left-hand locking valve, the six-bridge left electric control locking valve and the six-bridge left oil-gas spring.
Furthermore, a left middle accumulator is correspondingly arranged on the left sides of the three bridge and the four bridge, and a left rear accumulator is correspondingly arranged on the left sides of the five bridge and the six bridge, wherein the left middle accumulator is connected with a hydraulic oil path connected with the left manual locking valve of the three bridge and the left manual locking valve of the four bridge, and the left rear accumulator is connected with a hydraulic oil path connected with the left manual locking valve of the five bridge and the left manual locking valve of the six bridge.
Furthermore, the right front manual locking valve is connected with a combination of the one-bridge right manual locking valve, the one-bridge right electric control locking valve and the one-bridge right oil-gas spring through a hydraulic oil path, and is connected with a combination of the two-bridge right manual locking valve, the two-bridge right electric control locking valve and the two-bridge right oil-gas spring, and the hydraulic oil path is communicated with a right front accumulator arranged on the right side of the one-bridge and the two-bridge.
Furthermore, the left front manual locking valve is connected with a combination of the one-bridge left manual locking valve, the one-bridge left electric control locking valve and the one-bridge left oil-gas spring through a hydraulic oil path, and is connected with a combination of the two-bridge left manual locking valve, the two-bridge left electric control locking valve and the two-bridge left oil-gas spring, and the hydraulic oil path is communicated with a left front accumulator arranged on the left side of the one-bridge and the two-bridge.
In a second aspect, the present invention provides a control method, which applies the multi-axle suspension lifting hydraulic system, including: responding to a front axle attitude adjustment request, controlling to open a front vehicle attitude valve, a right front manual locking valve, a left front manual locking valve, an axle manual locking valve on a front axle and an axle electric control locking valve, closing a rear vehicle attitude valve, controlling a hydraulic oil pump to work if the front axle attitude adjustment request is to lift the front axle, and controlling the hydraulic oil pump to stop if the front axle attitude adjustment request is to lower the front axle;
responding to a rear axle attitude adjustment request, controlling to open a rear axle attitude valve, a right rear manual locking valve, a left rear manual locking valve, an axle manual locking valve on a rear axle and an axle electric control locking valve, closing a front axle attitude valve, controlling a hydraulic oil pump to work if the rear axle attitude adjustment request is to lift the rear axle, and controlling the hydraulic oil pump to stop if the rear axle attitude adjustment request is to lower the rear axle;
and responding to the integral attitude adjustment request, controlling and opening a front vehicle attitude valve, a right front manual locking valve, a left front manual locking valve, an axle manual locking valve and an axle electric control locking valve on a front shaft, a rear vehicle attitude valve, a right rear manual locking valve, a left rear manual locking valve, an axle manual locking valve on a rear shaft and an axle electric control locking valve, controlling the hydraulic oil pump to work if the integral attitude adjustment request is ascending, and controlling the hydraulic oil pump to stop if the integral attitude adjustment request is descending.
In a third aspect, the invention provides a multi-axle vehicle comprising a vehicle body having a front axle and a rear axle, said vehicle body employing said multi-axle suspension lift hydraulic system.
Compared with the prior art, the technical scheme provided by the embodiment of the invention has the following advantages:
in the multi-shaft suspension lifting hydraulic system, a hydraulic oil tank is communicated with a hydraulic oil pump, the hydraulic oil pump is connected with a rear vehicle posture valve through two hydraulic oil paths, and is connected with a front vehicle posture valve through the other two hydraulic oil paths; the rear vehicle posture valve is respectively connected with the right rear manual locking valve and the left rear manual locking valve; the front vehicle posture valve is respectively connected with a right front manual locking valve and a left front manual locking valve, wherein the right rear manual locking valve and the left rear manual locking valve are respectively connected with each rear axle hydro-pneumatic spring through hydraulic oil paths provided with the axle manual locking valve and the axle electric control locking valve, and the right front manual locking valve and the left front manual locking valve are respectively connected with each front axle hydro-pneumatic spring through hydraulic oil paths provided with the axle manual locking valve and the axle electric control locking valve. In the design, the front, rear, left and right independent hydraulic oil paths adjust the front, rear, left and right heights of the vehicle, and the convenience of height adjustment is improved. The structure is simple, the manufacturing cost and the maintenance cost are low, and the economical efficiency is high. The height is adjusted adaptively according to the conditions of empty and heavy load, the comfort of a driver is good, the bearing capacity is strong under the heavy load condition, and the reliability is high.
When the vehicle runs on a cross-country road surface, the hydro-pneumatic spring can be instantly shortened after receiving instant impact on the ground, hydraulic oil in the hydro-pneumatic spring is instantly pressed into the corresponding energy accumulator, the energy accumulator instantly absorbs the hydraulic pressure and then rebounds, so that the impact force on the ground is indirectly absorbed, the hydraulic oil is reversely pressed into the hydro-pneumatic spring, the normal length of the hydro-pneumatic spring is recovered, and the running smoothness of the vehicle is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
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, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of a multi-axis suspension lift hydraulic system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an architecture of a virtualized operating system including a real-time Linux kernel and a real-time virtual machine monitor kernel according to an embodiment of the present invention.
The reference numbers and meanings in the drawings are as follows:
1. a right bridge hydro-pneumatic spring; 2. a bridge right electrically controlled latching valve; 3. a right bridge manual latching valve; 4. a second-bridge right manual locking valve; 5. a second bridge right electric control locking valve; 6. a second bridge right hydro-pneumatic spring; 7. a right front accumulator; 8. a right-center accumulator; 9. a three-bridge right hand-operated latching valve; 10. a three-bridge right electric control locking valve; 11. a three-bridge right hydro-pneumatic spring; 12. a four-bridge right hand-operated latching valve; 13. a four-bridge right electrically controlled latching valve; 14. a four-bridge right hydro-pneumatic spring; 15. a rear right accumulator; 16. a five-bridge right manual locking valve; 17. a five-bridge right electric control locking valve; 18. a five-bridge right hydro-pneumatic spring; 19. a six-bridge right hand-operated latching valve; 20. a six-bridge right electric control locking valve; 21. a six-bridge right hydro-pneumatic spring; 22. a hydraulic oil tank; 23. a filter; 24. a hydraulic oil pump; 25. a rear vehicle attitude valve; 26. a front attitude valve; 27. a left front manual latching valve; 28. a left rear manual latching valve; 29. six-bridge left-hand-operated locking valve; 30. a six-bridge left electrically controlled latching valve; 31. a six-bridge left hydro-pneumatic spring; 32. five-bridge left-hand-operated locking valve; 33. a five-bridge left electric control locking valve; 34. a five-bridge left hydro-pneumatic spring; 35. a left rear accumulator; 36. a four-bridge left-hand-operated latching valve; 37. a four-bridge left electrically controlled latching valve; 38. a four-bridge left hydro-pneumatic spring; 39. a three-bridge left-hand-operated latching valve; 40. a three-bridge left electrically controlled latching valve; 41. a three-bridge left hydro-pneumatic spring; 42. a left-middle accumulator; 43. a left front accumulator; 44. two-bridge left-hand-operated locking valve; 45. a two-bridge left electric control locking valve; 46. a two-bridge left hydro-pneumatic spring; 47. a bridge left hand-actuated latching valve; 48. a bridge left electrically controlled latching valve; 49. a bridge left hydro-pneumatic spring; 50. a right front manual latching valve; 51. right rear manual latching valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Example 1
As shown in fig. 1, the present application provides a multi-axle suspension fork lift hydraulic system comprising: the hydraulic oil tank 22 is communicated with a hydraulic oil pump 24, and the hydraulic oil pump 24 is connected with a rear vehicle posture valve 25 through two hydraulic oil lines and is connected with a front vehicle posture valve 26 through the other two hydraulic oil lines; specifically, a filter 23 is arranged at an oil outlet end of the hydraulic oil pump 24, and the filter 23 outputs four hydraulic oil paths, wherein two paths are connected with the rear vehicle posture valve 25, and the other two paths are connected with the front vehicle posture valve 26.
The rear vehicle posture valve 25 is respectively connected with a right rear manual locking valve 51 and a left rear manual locking valve 28, and the right rear manual locking valve 51 and the left rear manual locking valve 28 are respectively connected with each rear axle hydro-pneumatic spring through a hydraulic oil path provided with an axle manual locking valve and an axle electric control locking valve. The corresponding axle manual locking valve, the axle electric control locking valve and the rear axle hydro-pneumatic spring form a combination, and the axle manual locking valve, the axle electric control locking valve and the rear axle hydro-pneumatic spring in the combination are sequentially connected in series through a hydraulic oil circuit.
In a specific implementation process, the output of the right rear manual locking valve 51 is divided into two hydraulic oil paths, wherein one hydraulic oil path is connected with the combination of the three-bridge right manual locking valve 9, the three-bridge right electric control locking valve 10 and the three-bridge right oil-gas spring 11, and is connected with the combination of the four-bridge right manual locking valve 12, the four-bridge right electric control locking valve 13 and the four-bridge right oil-gas spring 14; the other path is connected with the combination of a five-bridge right manual locking valve 16, a five-bridge right electric control locking valve 17 and a five-bridge right oil gas spring 18, and is connected with the combination of a six-bridge right manual locking valve 19, a six-bridge right electric control locking valve 20 and a six-bridge right oil gas spring 21.
And each two axles are provided with a pair of energy accumulators, and the energy accumulators are connected with the axle manual locking valves on the corresponding two axles through hydraulic oil lines. For the three-bridge and the four-bridge, right middle energy accumulators 8 are correspondingly arranged at the right sides of the three-bridge and the four-bridge; for the five-bridge and the six-bridge, right rear accumulators 15 are correspondingly arranged on the right sides of the five-bridge and the six-bridge, wherein the right middle accumulator 8 is connected with a hydraulic oil path connected with the three-bridge right manual locking valve 9 and the four-bridge right manual locking valve 12, and the right rear accumulator 15 is connected with a hydraulic oil path connected with the five-bridge right manual locking valve 16 and the six-bridge right manual locking valve 19.
In the specific implementation process, the output of the left rear manual locking valve 28 is divided into two hydraulic oil paths, one hydraulic oil path is connected with the combination of the three-bridge left manual locking valve 39, the three-bridge left electric control locking valve 40 and the three-bridge left oil-gas spring 41, the combination of the four-bridge left manual locking valve 36, the four-bridge left electric control locking valve 37 and the four-bridge left oil-gas spring 38, the other hydraulic oil path is connected with the combination of the five-bridge left manual locking valve 32, the five-bridge left electric control locking valve 33 and the five-bridge left oil-gas spring 34, and the combination of the six-bridge left manual locking valve 29, the six-bridge left electric control locking valve 30 and the six-bridge left oil-gas spring 31.
And each two axles are provided with a pair of accumulators, and the accumulators are connected with axle manual locking valves on the corresponding two axles through hydraulic oil lines. For the three-bridge and the four-bridge, the left middle accumulator 42 is correspondingly arranged on the left sides of the three-bridge and the four-bridge. For the five-bridge and the six-bridge, a left rear accumulator 35 is correspondingly arranged on the left sides of the five-bridge and the six-bridge, wherein the left middle accumulator 42 is connected with the hydraulic oil passages connected with the three-bridge left manual locking valve 39 and the four-bridge left manual locking valve 36, and the left rear accumulator 35 is connected with the hydraulic oil passages connected with the five-bridge left manual locking valve 32 and the six-bridge left manual locking valve 29.
The front vehicle posture valve 26 is respectively connected with a right front manual locking valve 50 and a left front manual locking valve 27, and the right front manual locking valve 50 and the left front manual locking valve 27 are respectively connected with front axle hydro-pneumatic springs through hydraulic oil paths of an axle manual locking valve and an axle electric control locking valve. The corresponding axle manual locking valve, the axle electric control locking valve and the front axle hydro-pneumatic spring form a combination, and the axle manual locking valve, the axle electric control locking valve and the front axle hydro-pneumatic spring in the combination are sequentially connected in series through a hydraulic oil circuit.
In a specific implementation process, the right front manual locking valve 50 is connected with a combination of the one-bridge right manual locking valve 3, the one-bridge right electric control locking valve 2 and the one-bridge right hydro-pneumatic spring 1 through a hydraulic oil path, and is connected with a combination of the two-bridge right manual locking valve 4, the two-bridge right electric control locking valve 5 and the two-bridge right hydro-pneumatic spring 6, and a right front energy accumulator 7 arranged on the right side of the one bridge and the two bridges is communicated with the hydraulic oil path.
In the specific implementation process, the left front manual locking valve 27 is connected with the combination of the one-bridge left manual locking valve 47, the one-bridge left electric control locking valve 48 and the one-bridge left oil-gas spring 49 through a hydraulic oil path, and is connected with the combination of the two-bridge left manual locking valve 44, the two-bridge left electric control locking valve 45 and the two-bridge left oil-gas spring 46, and the hydraulic oil path is communicated with the left front accumulator 43 arranged on the left side of the one-bridge and the two-bridge.
Example 2
Referring to fig. 2, the present invention provides a control method applied to the multi-axle suspension lifting hydraulic system, including:
responding to the posture adjustment request of the front axle of the automobile, controlling to open a front automobile posture valve, a right front manual locking valve, a left front manual locking valve, an axle manual locking valve on the front axle and an axle electric control locking valve, closing a rear automobile posture valve, controlling a hydraulic oil pump to work if the posture adjustment request of the front axle is to lift the front axle, controlling the hydraulic oil pump to stop if the posture adjustment request of the front axle is to lower the front axle, and shortening a corresponding oil-gas spring by depending on the self gravity of the front axle at the moment; and when the front axle attitude is raised or lowered to the target height, closing and opening the front vehicle attitude valve, the right front manual locking valve, the left front manual locking valve, the axle manual locking valve on the front axle and the axle electric control locking valve.
Responding to a rear axle attitude adjustment request, controlling to open a rear axle attitude valve, a right rear manual locking valve, a left rear manual locking valve, an axle manual locking valve on a rear axle and an axle electric control locking valve, closing a front axle attitude valve, controlling a hydraulic oil pump to work if the rear axle attitude adjustment request is to lift the rear axle, controlling the hydraulic oil pump to stop if the rear axle attitude adjustment request is to lower the rear axle, and shortening a corresponding oil-gas spring by depending on the self gravity of the rear axle; and when the rear axle attitude is raised or lowered to the target height, closing the rear vehicle attitude valve, the right rear manual locking valve, the left rear manual locking valve, the axle manual locking valve on the rear axle and the axle electric control locking valve.
And responding to the integral attitude adjustment request, controlling and opening a front vehicle attitude valve, a right front manual locking valve, a left front manual locking valve, an axle manual locking valve and an axle electric control locking valve on a front shaft, a rear vehicle attitude valve, a right rear manual locking valve, a left rear manual locking valve, an axle manual locking valve on a rear shaft and an axle electric control locking valve, controlling the hydraulic oil pump to work if the integral attitude adjustment request is ascending, and controlling the hydraulic oil pump to stop if the integral attitude adjustment request is descending. And when the overall attitude is raised or lowered to the target height, closing the front vehicle attitude valve, the right front manual locking valve, the left front manual locking valve, the axle manual locking valve and the axle electric control locking valve on the front shaft, the rear vehicle attitude valve, the right rear manual locking valve, the left rear manual locking valve, the axle manual locking valve on the rear shaft and the axle electric control locking valve.
Example 3
The embodiment of the invention provides a multi-axle automobile which comprises an automobile body with a front axle and a rear axle, wherein the automobile body is provided with the multi-axle suspension lifting hydraulic system.
In the embodiments provided herein, it should be understood that the disclosed structures and methods may be implemented in other ways. For example, the above-described structural embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and there may be other divisions when the actual implementation is performed, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, structures or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A multi-axle suspension lift hydraulic system, comprising: the hydraulic oil tank (22) is communicated with a hydraulic oil pump (24), and the hydraulic oil pump (24) is connected with a rear vehicle posture valve (25) through two hydraulic oil paths and is connected with a front vehicle posture valve (26) through the other two hydraulic oil paths;
the rear vehicle posture valve (25) is respectively connected with a right rear manual locking valve (51) and a left rear manual locking valve (28); the front vehicle posture valve (26) is respectively connected with a right front manual locking valve (50) and a left front manual locking valve (27), wherein the right rear manual locking valve (51) and the left rear manual locking valve (28) are respectively connected with each rear axle oil-gas spring through a hydraulic oil line provided with an axle manual locking valve and an axle electric control locking valve, and the right front manual locking valve (50) and the left front manual locking valve (27) are respectively connected with each front axle oil-gas spring through a hydraulic oil line provided with an axle manual locking valve and an axle electric control locking valve;
and each two axles are provided with a pair of accumulators, and the accumulators are connected with axle manual locking valves on the corresponding two axles through hydraulic oil lines.
2. The multi-axle suspension lifting hydraulic system according to claim 1, characterized in that a filter (23) is arranged at the oil outlet end of the hydraulic oil pump (24), and the filter (23) outputs four hydraulic oil paths, wherein two paths are connected with the rear vehicle posture valve (25) and the other two paths are connected with the front vehicle posture valve (26).
3. The multi-axle suspension lifting hydraulic system according to claim 1, wherein the output of the right rear manual locking valve (51) is divided into two hydraulic oil lines, one hydraulic oil line is connected with the combination of the three-axle right manual locking valve (9), the three-axle right electric control locking valve (10) and the three-axle right hydro-pneumatic spring (11), and is connected with the combination of the four-axle right manual locking valve (12), the four-axle right electric control locking valve (13) and the four-axle right hydro-pneumatic spring (14), the other hydraulic oil line is connected with the combination of the five-axle right manual locking valve (16), the five-axle right electric control locking valve (17) and the five-axle right hydro-pneumatic spring (18), and is connected with the combination of the six-axle right manual locking valve (19), the six-axle right electric control locking valve (20) and the six-axle right hydro-pneumatic spring (21).
4. The multi-axle suspension lifting hydraulic system according to claim 3, characterized in that a right middle accumulator (8) is correspondingly arranged on the right side of the three-axle and the four-axle, and a right rear accumulator (15) is correspondingly arranged on the right side of the five-axle and the six-axle, wherein the right middle accumulator (8) is connected with the hydraulic oil circuit connected with the three-axle right manual locking valve (9) and the four-axle right manual locking valve (12), and the right rear accumulator (15) is connected with the hydraulic oil circuit connected with the five-axle right manual locking valve (16) and the six-axle right manual locking valve (19).
5. The multi-axle suspension lifting hydraulic system according to claim 1, characterized in that the output of the left rear manual latching valve (28) is divided into two hydraulic oil lines, one hydraulic oil line is connected with a combination of a three-axle left manual latching valve (39), a three-axle left electrically controlled latching valve (40) and a three-axle left hydro-pneumatic spring (41), and is connected with a combination of a four-axle left manual latching valve (36), a four-axle left electrically controlled latching valve (37) and a four-axle left hydro-pneumatic spring (38), and the other hydraulic oil line is connected with a combination of a five-axle left manual latching valve (32), a five-axle left electrically controlled latching valve (33) and a five-axle left hydro-pneumatic spring (34), and is connected with a combination of a six-axle left manual latching valve (29), a six-axle left electrically controlled latching valve (30) and a six-axle left hydro-pneumatic spring (31).
6. Multiaxial suspension fork lifting hydraulic system according to claim 5 where a left middle accumulator (42) is provided for each of the three and four bridge left sides and a left rear accumulator (35) is provided for each of the five and six bridge left sides, where the left middle accumulator (42) connects the hydraulic lines to which the three-bridge left manual latching valve (39) and the four-bridge left manual latching valve (36) are connected and the left rear accumulator (35) connects the hydraulic lines to which the five-bridge left manual latching valve (32) and the six-bridge left manual latching valve (29) are connected.
7. The multi-axle suspension lifting hydraulic system according to claim 1, characterized in that the right front manual locking valve (50) is connected with a combination of a bridge right manual locking valve (3), a bridge right electric control locking valve (2) and a bridge right hydro-pneumatic spring (1) through a hydraulic oil circuit, and is connected with a combination of a two-bridge right manual locking valve (4), a two-bridge right electric control locking valve (5) and a two-bridge right hydro-pneumatic spring (6), and a right front accumulator (7) arranged on the right side of the two bridges of the one bridge is communicated with the hydraulic oil circuit.
8. The multi-axle suspension lifting hydraulic system according to claim 1, characterized in that the left front manual latching valve (27) is connected with a combination of a left axle left manual latching valve (47), a left axle electrically controlled latching valve (48) and a left axle hydro-pneumatic spring (49) through a hydraulic oil circuit, and is connected with a combination of a left axle left manual latching valve (44), a left axle electrically controlled latching valve (45) and a left axle hydro-pneumatic spring (46), and a left front accumulator (43) arranged on the left side of the two axles of the one axle is communicated with the hydraulic oil circuit.
9. A control method applied to the multi-axis suspension lifting hydraulic system according to any one of claims 1 to 8, characterized by comprising: responding to a front axle attitude adjustment request, controlling to open a front vehicle attitude valve, a right front manual locking valve, a left front manual locking valve, an axle manual locking valve on a front axle and an axle electric control locking valve, closing a rear vehicle attitude valve, controlling a hydraulic oil pump to work if the front axle attitude adjustment request is to lift the front axle, and controlling the hydraulic oil pump to stop if the front axle attitude adjustment request is to lower the front axle;
responding to a rear axle attitude adjustment request, controlling to open a rear axle attitude valve, a right rear manual locking valve, a left rear manual locking valve, an axle manual locking valve on a rear axle and an axle electric control locking valve, closing a front axle attitude valve, controlling a hydraulic oil pump to work if the rear axle attitude adjustment request is to lift the rear axle, and controlling the hydraulic oil pump to stop if the rear axle attitude adjustment request is to lower the rear axle;
and responding to the integral attitude adjustment request, controlling and opening a front vehicle attitude valve, a right front manual locking valve, a left front manual locking valve, an axle manual locking valve and an axle electric control locking valve on a front shaft, a rear vehicle attitude valve, a right rear manual locking valve, a left rear manual locking valve, an axle manual locking valve on a rear shaft and an axle electric control locking valve, controlling the hydraulic oil pump to work if the integral attitude adjustment request is ascending, and controlling the hydraulic oil pump to stop if the integral attitude adjustment request is descending.
10. A multi-axle vehicle comprising a vehicle body having a front axle and a rear axle, wherein the vehicle body employs the multi-axle suspension raising and lowering hydraulic system of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518836.1A CN115782499A (en) | 2022-11-30 | 2022-11-30 | Multi-shaft suspension lifting hydraulic system, control method and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211518836.1A CN115782499A (en) | 2022-11-30 | 2022-11-30 | Multi-shaft suspension lifting hydraulic system, control method and automobile |
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| CN115782499A true CN115782499A (en) | 2023-03-14 |
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| CN202211518836.1A Pending CN115782499A (en) | 2022-11-30 | 2022-11-30 | Multi-shaft suspension lifting hydraulic system, control method and automobile |
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| CN (1) | CN115782499A (en) |
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Effective date of registration: 20230419 Address after: No. 583, Jiyan Road, Huaiyin District, Jinan City, Shandong Province, 250117 Applicant after: China National Heavy Duty Truck Group Ji'nan Special Vehicle Co.,Ltd. Address before: Shengjing tangwangshan Road North Panwang Road West, Zhangqiu District, Jinan City, Shandong Province 250200 Applicant before: China National Heavy Duty Truck Group Jinan Power Co.,Ltd. |