CN115257918A - Electronic hydraulic power steering system, vehicle and control method - Google Patents
Electronic hydraulic power steering system, vehicle and control method Download PDFInfo
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- CN115257918A CN115257918A CN202211084150.6A CN202211084150A CN115257918A CN 115257918 A CN115257918 A CN 115257918A CN 202211084150 A CN202211084150 A CN 202211084150A CN 115257918 A CN115257918 A CN 115257918A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 30
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 166
- 239000007788 liquid Substances 0.000 description 16
- 230000005611 electricity Effects 0.000 description 10
- 239000010720 hydraulic oil Substances 0.000 description 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
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Abstract
The application provides an electronic hydraulic power steering system, a vehicle and a control method. The electronic hydraulic power-assisted steering system comprises a steering device, an electro-hydraulic power-assisted steering device assembly, a steering oil pump assembly, an energy supply assembly and a redundant assembly. The steering device is in driving connection with the wheels. The electro-hydraulic power steering gear component comprises a first electro-hydraulic power steering gear and a second electro-hydraulic power steering gear which are respectively connected with the steering device. The steering oil pump assembly comprises a first steering oil pump for supplying oil to the first electro-hydraulic power steering gear and a second steering oil pump for supplying oil to the second electro-hydraulic power steering gear. The energy supply subassembly includes a plurality of energy supplies, and redundant subassembly includes a plurality of redundant energy supplies with a plurality of energy supplies one-to-one, and each redundant energy supply is configured as and each other is the backup with the energy supply that corresponds to when the energy supply that corresponds breaks down, take over the work of the energy supply that corresponds, thereby make the steering ability of electron hydraulic power assisted steering system can not receive the influence, reduce the potential safety hazard that the vehicle exists.
Description
Technical Field
The present application relates to the field of vehicle steering technologies, and in particular, to an electronic hydraulic power steering system, a vehicle, and a control method.
Background
Steering is one of the most common operations in vehicle driving, and is very dangerous when there is a problem in steering of the vehicle, so that stability of the steering ability of the vehicle is very important. In some vehicles, an electronic hydraulic power steering system is adopted to improve the stability and operability during steering, but after long-time driving, some parts in the electronic hydraulic power steering system inevitably break down, the steering capacity of the vehicle is greatly influenced, and certain potential safety hazards exist.
Disclosure of Invention
In view of the above, it is necessary to provide an electronic hydraulic power steering system, a vehicle and a control method, which can solve the problem that the steering capability of the vehicle is greatly affected when some components in the electronic hydraulic power steering system are failed.
According to a first aspect of the present application, there is provided an electro-hydraulic power steering system including:
the steering device is in driving connection with the wheels;
the electro-hydraulic power steering gear assembly comprises a first electro-hydraulic power steering gear and a second electro-hydraulic power steering gear, and the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear are respectively connected with the steering device so as to drive the wheels to steer;
the steering oil pump assembly comprises a first steering oil pump and a second steering oil pump, and the first steering oil pump is connected with the first electro-hydraulic power steering gear and used for supplying oil to the first electro-hydraulic power steering gear; the second steering oil pump is connected with the second electro-hydraulic power steering gear and used for supplying oil to the second electro-hydraulic power steering gear;
the energy supply assembly comprises a plurality of energy supply pieces, and the plurality of energy supply pieces are used for respectively supplying energy to the first electro-hydraulic power steering gear, the second electro-hydraulic power steering gear, the first steering oil pump and the second steering oil pump so as to respectively enable the first electro-hydraulic power steering gear, the second electro-hydraulic power steering gear, the first steering oil pump and the second steering oil pump to work; and the number of the first and second groups,
the redundancy assembly comprises a plurality of redundancy energy supply pieces in one-to-one correspondence with the energy supply pieces, each redundancy energy supply piece is configured to be backup with the corresponding energy supply piece, and when the corresponding energy supply piece fails, the redundancy energy supply piece takes over the work of the corresponding energy supply piece.
In one embodiment, the plurality of energy supply parts comprise two first power supplies and two high-voltage power supplies, wherein the two first power supplies are used for respectively supplying power to the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear;
the two high-voltage power supplies are used for respectively providing electric power for the first steering oil pump and the second steering oil pump;
the plurality of redundant energy supply pieces comprise two second power supplies in one-to-one correspondence with the first power supplies and two low-voltage power supplies in one-to-one correspondence with the high-voltage power supplies;
each second power supply is used for supplying power to the first electro-hydraulic power steering gear or the second electro-hydraulic power steering gear when the corresponding first power supply fails;
each of the low voltage power supplies is configured to supply electric power to the first steering oil pump or the second steering oil pump when the corresponding high voltage power supply fails.
In one embodiment, the plurality of energy supply parts further comprise two first motors, and the two first motors are used for being respectively connected with the worm of the first electro-hydraulic power steering gear and the worm of the second electro-hydraulic power steering gear in a driving mode;
the plurality of redundant energy supply parts comprise two second motors which are arranged corresponding to the two first motors, and each second motor is used for driving the worm of the first electro-hydraulic power steering gear or the worm of the second electro-hydraulic power steering gear to rotate when the corresponding first motor fails.
In one embodiment, a first oil supply pipeline is arranged between the first steering oil pump and the first electro-hydraulic power steering gear;
a second oil supply pipeline is arranged between the second steering oil pump and the second electro-hydraulic power steering gear;
redundant subassembly is still including the intercommunication first supply oil pipe way with the second supplies oil pipe way the intercommunication pipeline and locates electromagnetism proportional valve on the intercommunication pipeline, electromagnetism proportional valve is used for first turn to the oil pump and open when the second turns to arbitrary trouble in the oil pump, with the intercommunication first supply oil pipe way with the second supplies oil pipe way.
In one embodiment, the energy supply device further comprises a controller, a communication line is arranged between the controller and each energy supply piece, the controller is used for receiving the working information of each energy supply piece and controlling the corresponding redundant energy supply piece to work when the working information is abnormal;
redundant subassembly still include with many redundant communication lines that communication line one-to-one set up, each redundant communication line is used for corresponding when communication line trouble make the correspondence energy supply piece with keep being connected between the controller.
In one embodiment, the steering device includes a first steering axle, a first steering drive axle, a second steering axle and a second steering drive axle, and the first steering axle, the first steering drive axle, the second steering axle and the second steering drive axle are respectively in driving connection with the wheels;
the electro-hydraulic power steering gear component further comprises a third electro-hydraulic power steering gear and a fourth electro-hydraulic power steering gear, and the first electro-hydraulic power steering gear is in driving connection with the first steering axle; the second electro-hydraulic power steering gear is in driving connection with the first steering drive axle; the third electro-hydraulic power-assisted steering gear is in driving connection with the second steering axle, and the fourth electro-hydraulic power-assisted steering gear is in driving connection with the second steering axle;
the steering oil pump assembly further comprises a third steering oil pump and a fourth steering oil pump, and the third steering oil pump is communicated with the third electro-hydraulic power steering gear so as to supply oil to the third electro-hydraulic power steering gear; and the fourth steering oil pump is communicated with the fourth electro-hydraulic power steering gear to supply oil to the fourth electro-hydraulic power steering gear.
According to a second aspect of the present application, a vehicle is proposed, the vehicle comprising an electro-hydraulic power steering system as described above, the electro-hydraulic power steering system:
the steering device is in driving connection with the wheels;
the electro-hydraulic power steering gear assembly comprises a first electro-hydraulic power steering gear and a second electro-hydraulic power steering gear, and the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear are respectively connected with the steering device so as to drive the wheels to steer;
the steering oil pump assembly comprises a first steering oil pump and a second steering oil pump, and the first steering oil pump is connected with the first electro-hydraulic power steering gear and used for supplying oil to the first electro-hydraulic power steering gear; the second steering oil pump is connected with the second electro-hydraulic power steering gear and used for supplying oil to the second electro-hydraulic power steering gear;
an energizing assembly comprising a plurality of energizing members for energizing the first electro-hydraulic power steering gear, the second electro-hydraulic power steering gear, the first steering oil pump, and the second steering oil pump, respectively, to enable operation of the first electro-hydraulic power steering gear, the second electro-hydraulic power steering gear, the first steering oil pump, and the second steering oil pump, respectively; and (c) a second step of,
the redundant assembly comprises a plurality of redundant energy supply pieces in one-to-one correspondence with the energy supply pieces, each redundant energy supply piece is configured to be a backup for the corresponding energy supply piece, and when the corresponding energy supply pieces fail, the redundant energy supply pieces take over the work of the corresponding energy supply pieces.
According to a third aspect of the present application, there is provided a control method applied to a vehicle as described above, the control method including:
monitoring the working state of each energy supply part;
and when the energy supply part fails, controlling the corresponding redundant energy supply part to work.
In one embodiment, the plurality of energy supply parts comprise two first power supplies and two high-voltage power supplies, and the two first power supplies are used for respectively supplying power to the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear; the two high-voltage power supplies are used for respectively supplying power to the first steering oil pump and the second steering oil pump; the redundant energy supply pieces comprise two second power supplies which correspond to the two first power supplies one by one and two low-voltage power supplies which correspond to the two high-voltage power supplies one by one;
when energy supply spare is trouble, control corresponds redundant energy supply spare work specifically includes:
when the first power supply fails, controlling the second power supply corresponding to the failed first power supply to work;
and when the high-voltage power supply fails, controlling the low-voltage power supply corresponding to the failed high-voltage power supply to work.
In one embodiment, a first oil supply pipeline is arranged between the first steering oil pump and the first electro-hydraulic power steering gear; a second oil supply pipeline is arranged between the second steering oil pump and the second electro-hydraulic power steering gear; the redundancy assembly further comprises a communication pipeline for communicating the first oil supply pipeline and the second oil supply pipeline and an electromagnetic proportional valve arranged on the communication pipeline;
after the operating condition of monitoring each energy supply piece, still include:
when any one of the first steering oil pump and the second steering oil pump fails, controlling the electromagnetic proportional valve to be opened;
and adjusting the opening degree of the electromagnetic proportional valve to enable the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear to work normally.
In the technical scheme of this application, first steering oil pump supplies oil to first electricity liquid power assisted steering ware, and the second steering oil pump supplies oil to second electricity liquid power assisted steering ware to make first electricity liquid power assisted steering ware and second electricity liquid power assisted steering ware pass through oil pressure drive steering device, make the wheel accomplish to turn to. It should be noted that a plurality of energy supply pieces in this application all are provided with the redundant energy supply piece of backup, and this makes when energy supply piece breaks down, and the work of the energy supply piece that breaks down can be taken over rapidly to the redundant energy supply piece to guarantee first electric liquid power assisted steering ware, second electric liquid power assisted steering ware, first steering oil pump and second steering oil pump normal work. Therefore, when the energy supply part has an unexpected fault, the redundant energy supply part can take over the work in time, so that the steering capacity of the electronic hydraulic power-assisted steering system cannot be influenced, and the potential safety hazard of the vehicle is reduced.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an electro-hydraulic power steering system provided herein;
FIG. 2 is a schematic flow chart diagram illustrating an embodiment of a control method provided herein;
fig. 3 is a schematic flowchart of another embodiment of the control method provided in the present application.
The reference numbers indicate:
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Steering is one of the most common operations in vehicle driving, and is very dangerous when there is a problem in steering of the vehicle, so that stability of the steering ability of the vehicle is very important. In some vehicles, an electronic hydraulic power steering system is adopted to improve the stability and operability during steering, but after long-time driving, some parts in the electronic hydraulic power steering system are difficult to avoid to break down, the steering capacity of the vehicle is greatly influenced, and certain potential safety hazards exist.
In view of this, the present application proposes a vehicle comprising an electro-hydraulic power steering system, as long as the vehicle comprises the electro-hydraulic power steering system. Fig. 1 is a schematic structural diagram of an embodiment of an electro-hydraulic power steering system according to the present disclosure.
Referring to fig. 1, the present application provides an electro-hydraulic power steering system 100, in which the electro-hydraulic power steering system 100 includes a steering apparatus 1, an electro-hydraulic power steering assembly 2, a steering oil pump assembly 3, an energy supply assembly, and a redundancy assembly 4. The steering device 1 is intended to be in driving connection with a wheel. The electro-hydraulic power steering gear component 2 comprises a first electro-hydraulic power steering gear 21 and a second electro-hydraulic power steering gear 22, and the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 are respectively connected with the steering device 1 to drive wheels to steer.
The steering oil pump assembly 3 comprises a first steering oil pump 31 and a second steering oil pump 32, wherein the first steering oil pump 31 is connected with the first electro-hydraulic power steering gear 21 and is used for supplying oil to the first electro-hydraulic power steering gear 21; the second steering oil pump 32 is connected to the second electro-hydraulic power steering gear 22 to supply oil to the second electro-hydraulic power steering gear 22.
The energy supply assembly comprises a plurality of energy supply pieces, and the plurality of energy supply pieces are used for respectively supplying energy to the first electro-hydraulic power steering gear 21, the second electro-hydraulic power steering gear 22, the first steering oil pump 31 and the second steering oil pump 32 so as to respectively enable the first electro-hydraulic power steering gear 21, the second electro-hydraulic power steering gear 22, the first steering oil pump 31 and the second steering oil pump 32 to work.
The redundant assembly 4 comprises a plurality of redundant energy supplying pieces in one-to-one correspondence with the plurality of energy supplying pieces, each redundant energy supplying piece is configured to be a backup for the corresponding energy supplying piece, and when the corresponding energy supplying piece fails, the corresponding energy supplying piece is taken over for work.
In the technical scheme of this application, first steering oil pump 31 supplies oil to first electric liquid power steering gear 21, and second steering oil pump 32 supplies oil to second electric liquid power steering gear 22 to make first electric liquid power steering gear 21 and second electric liquid power steering gear 22 pass through oil pressure drive steering device 1, make the wheel accomplish to turn to. It should be noted that, in the present application, a plurality of energy supply units are provided with redundant energy supply units, which makes it possible for the redundant energy supply units to quickly take over the operation of a failed energy supply unit when the energy supply unit fails, thereby ensuring that the first electro-hydraulic power steering gear 21, the second electro-hydraulic power steering gear 22, the first steering oil pump 31, and the second steering oil pump 32 operate normally. Therefore, when the power supply part has an unexpected fault, the redundant power supply part can take over the work in time, so that the steering capacity of the electronic hydraulic power steering system 100 cannot be influenced, and the potential safety hazard of the vehicle is reduced.
In a specific application, the energy supplying members in the electronic hydraulic power steering system 100 can work independently, and when the energy supplying members have faults, the corresponding redundant energy supplying members are opened and replace the work of the faulty energy supplying members. The energy supply part can work together with the redundant energy supply part, so that the working efficiency can be increased, when the energy supply part fails and one of the redundant energy supply parts fails, the other one of the redundant energy supply parts can continue to work, and the steering capacity of the electronic hydraulic power-assisted steering system 100 is not influenced.
In some embodiments, the plurality of power supply units includes two first power supplies and two high voltage power supplies, and the two first power supplies are used for respectively providing power for the first electro-hydraulic power steering unit 21 and the second electro-hydraulic power steering unit 22. Two high-voltage power supplies are used to supply electric power to the first steering oil pump 31 and the second steering oil pump 32, respectively. The plurality of redundant energy supply pieces comprise two second power supplies in one-to-one correspondence with the first power supplies and two low-voltage power supplies in one-to-one correspondence with the high-voltage power supplies. Each second power source is configured to provide power to the first electro-hydraulic power steering gear 21 or the second electro-hydraulic power steering gear 22 when the corresponding first power source fails. Each low-voltage power source is used to supply electric power to the first steering oil pump 31 or the second steering oil pump 32 when the corresponding high-voltage power source fails.
In the present embodiment, the first electro-hydraulic power steering gear 21, the second electro-hydraulic power steering gear 22, the first steering oil pump 31 and the second steering oil pump 32 all need electric power to work normally, and therefore the plurality of energy supplying components include two first power supplies and two high voltage power supplies. When the first power supply fails, the first electro-hydraulic power steering device 21 and the second electro-hydraulic power steering device 22 may not work properly. However, in this embodiment, the two second power sources may replace the two first power sources to supply power to the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22, so that the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 are not affected when the first power sources are damaged, and the normal operation is maintained.
When the high-voltage power supply fails, the first steering oil pump 31 and the second steering oil pump 32 may not operate normally. However, in this embodiment, the two low-voltage power supplies can replace the two high-voltage power supplies to supply power to the first steering oil pump 31 and the second steering oil pump 32, so as to ensure that the first steering oil pump 31 and the second steering oil pump 32 are not affected when the high-voltage power supplies are damaged, and maintain normal operation.
In some embodiments, the plurality of energy supply components further includes two first motors configured to be in driving connection with the worm of the first electro-hydraulic power steering gear 21 and the worm of the second electro-hydraulic power steering gear 22, respectively. The plurality of redundant power supply components comprise two second motors which are arranged corresponding to the two first motors, and each second motor is used for driving the worm of the first electro-hydraulic power steering gear 21 or the worm of the second electro-hydraulic power steering gear 22 to rotate when the corresponding first motor fails.
In a specific application, the electronic hydraulic power steering system 100 may be applied to an unmanned vehicle, and the unmanned vehicle does not have a driver to rotate a steering wheel during driving, so that the vehicle control unit 5 is required to control the two first motors to rotate, so that the first electric-hydraulic power steering unit 21 and the second electric-hydraulic power steering unit 22 are enabled to steer.
In this embodiment, the energy supply unit further includes two first motors for driving the first electro-hydraulic power steering device 21 and the second electro-hydraulic power steering device 22 to steer, and when the two first motors fail, the first electro-hydraulic power steering device 21 and the second electro-hydraulic power steering device 22 cannot normally start to steer, so that an accident may occur in the unmanned vehicle. However, in this embodiment, the plurality of redundant energy supply units include two second motors corresponding to the two first motors, and the two second motors are used for driving the first electro-hydraulic power steering unit 21 or the second electro-hydraulic power steering unit 22 to steer in time when the first motors fail, so as to ensure normal driving of the unmanned vehicle.
In some embodiments, a first oil supply line is provided between the first steering oil pump 31 and the first electro-hydraulic power steering gear 21. A second oil supply line is arranged between the second steering oil pump 32 and the second electro-hydraulic power steering gear 22. The redundant assembly 4 further includes a communication pipeline 41 for communicating the first oil supply pipeline with the second oil supply pipeline, and an electromagnetic proportional valve 42 disposed on the communication pipeline 41, wherein the electromagnetic proportional valve 42 is configured to open when any one of the first steering oil pump 31 and the second steering oil pump 32 fails, so as to communicate the first oil supply pipeline with the second oil supply pipeline.
The first steering oil pump 31 and the second steering oil pump 32 have the same risk of failure, and when the first steering oil pump 31 and the second steering oil pump 32 have the failure, the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 cannot obtain hydraulic oil, and thus cannot work normally. Therefore, in the present embodiment, the redundant module 4 further includes a communication pipeline 41 for communicating the first oil supply pipeline with the second oil supply pipeline, and an electromagnetic proportional valve 42 installed on the communication pipeline 41, wherein when any one of the first steering oil pump 31 and the second steering oil pump 32 fails, the electromagnetic proportional valve 42 is opened to communicate the first oil supply pipeline with the second oil supply pipeline, so that the other one of the first steering oil pump 31 and the second steering oil pump 32 supplies oil to the first electric-hydraulic power steering gear 21 and the second electric-hydraulic power steering gear 22 at the same time.
It should be noted that the electromagnetic proportional valve 42 can adjust the flow rate and the opening degree, so that the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 can obtain a proper amount of hydraulic oil, thereby ensuring that the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 keep working normally when any one of the first steering oil pump 31 and the second steering oil pump 32 fails.
In some embodiments, the electronic hydraulic power steering system 100 further includes a controller 5, a communication line is provided between the controller 5 and each energy supplying member, and the controller 5 is configured to receive operation information of each energy supplying member and control a corresponding redundant energy supplying member to operate when the operation information is abnormal. The redundant assembly 4 further comprises a plurality of redundant communication lines arranged in one-to-one correspondence with the communication lines, each redundant communication line being configured to maintain a connection between a corresponding energizing member and the controller 5 in the event of a failure of the corresponding communication line.
When some of the energy supply units fail, the controller 5 needs to control the corresponding redundant energy supply unit to take over the work. In this process, the controller 5 needs to determine whether the operating state of the power supply member is normal. Therefore, a communication line is arranged between the controller 5 and each energy supply piece, so that the working state of the energy supply pieces is judged through the working information, and the redundant energy supply pieces can be timely made to take over the work of the energy supply pieces with faults.
When the communication line is in fault, the controller 5 cannot receive the working information, and the working state of the energy supply part cannot be accurately judged. Therefore, the redundant assembly 4 is also provided with a redundant communication line, so that stable connection between the energy supply part and the controller 5 is ensured, and the redundant energy supply part can timely and accurately take over the work of the energy supply part with faults.
In some embodiments, the steering device 1 includes a first steering axle 11, a first steering driving axle 12, a second steering axle 13, and a second steering driving axle 14, and the first steering axle 11, the first steering driving axle 12, the second steering axle 13, and the second steering driving axle 14 are respectively configured to be in driving connection with wheels.
The electro-hydraulic power steering gear component 2 further comprises a third electro-hydraulic power steering gear 23 and a fourth electro-hydraulic power steering gear 24, the first electro-hydraulic power steering gear 21 is in driving connection with the first steering axle 11, and the second electro-hydraulic power steering gear 22 is in driving connection with the first steering drive axle 12. The third electro-hydraulic power steering gear 23 is in driving connection with the second steering axle 13, and the fourth electro-hydraulic power steering gear 24 is in driving connection with the second steering drive axle 14.
The steering oil pump assembly 3 further includes a third steering oil pump 33 and a fourth steering oil pump 34, and the third steering oil pump 33 is communicated with the third electro-hydraulic power steering gear 23 to supply oil to the third electro-hydraulic power steering gear 23. The fourth steering oil pump 34 communicates with the fourth electro-hydraulic power steering gear 24 to supply oil to the fourth electro-hydraulic power steering gear 24.
In specific application, the vehicle can be provided with single-shaft steering and can also be provided with multi-shaft cooperative steering. When multi-axle cooperative steering is provided, the steering device 1 includes a first steer axle 11, a first steer-drive axle 12, a second steer axle 13, and a second steer-drive axle 14. The steering capability of multi-shaft cooperative steering is more excellent, and more use requirements can be met.
When the steering device 1 comprises a first steering axle 11, a first steering drive axle 12, a second steering axle 13 and a second steering drive axle 14, the electro-hydraulic power steering gear component 2 is correspondingly provided with a first electro-hydraulic power steering gear 21, a second electro-hydraulic power steering gear 22, a third electro-hydraulic power steering gear 23 and a fourth electro-hydraulic power steering gear 24, and the steering oil pump component 3 is correspondingly provided with a first steering oil pump 31, a second steering oil pump 32, a third steering oil pump 33 and a fourth steering oil pump 34. In the embodiment, four steering axles are matched by setting four groups of electro-hydraulic power steering gears corresponding to each other and a steering oil pump, so that multi-axis cooperative steering of the vehicle is realized, and the steering capacity of the electro-hydraulic power steering system 100 is more excellent.
The application also provides a control method, which is applied to a vehicle, and the vehicle comprises the electronic hydraulic power steering system 100 of any one of the above embodiments. Fig. 2 to fig. 3 are schematic flow charts of an embodiment of a control method provided in the present application. Referring to fig. 2, the control method includes:
s10: the working state of each energy supply part is monitored.
S20: when the energy supply part fails, the corresponding redundant energy supply part is controlled to work.
In this embodiment, the controller 5 determines whether each energy supplying member is out of order by monitoring the operating state of each energy supplying member in real time, and when there is a failure in an energy supplying member, the controller 5 controls the corresponding redundant energy supplying member to take over. The controller 5 can monitor the working state of each energy supply part in real time, so that the redundant energy supply parts can timely take over the work of the failed energy supply part, the gap of alternate work is reduced, and the steering capacity of the vehicle is kept stable.
In some embodiments, the plurality of power supply units includes two first power supplies and two high voltage power supplies, and the two first power supplies are used for respectively supplying power to the first electro-hydraulic power steering unit 21 and the second electro-hydraulic power steering unit 22. The two high-voltage power supplies are used to supply power to the first steering oil pump 31 and the second steering oil pump 32, respectively. The plurality of redundant energy supply pieces comprise two second power supplies which are in one-to-one correspondence with the two first power supplies and two low-voltage power supplies which are in one-to-one correspondence with the two high-voltage power supplies.
Step S20 specifically includes:
s21: and when the first power supply fails, controlling a second power supply corresponding to the failed first power supply to work.
S22: and when the high-voltage power supply fails, controlling the low-voltage power supply corresponding to the failed high-voltage power supply to work.
In this embodiment, when the first power fails, the first electro-hydraulic power steering device 21 or the second electro-hydraulic power steering device 22 cannot work normally, and the controller 5 immediately controls the corresponding second power to take over working, so as to ensure that the first electro-hydraulic power steering device 21 or the second electro-hydraulic power steering device 22 works stably. When the high-voltage power supply fails, the first steering oil pump 31 or the second oil pump cannot work normally, and then the first electro-hydraulic power steering gear 21 or the second electro-hydraulic power steering gear 22 cannot receive hydraulic oil normally, so that normal work is affected. The control unit 5 will therefore control the corresponding low-voltage power supply to take over, so that on the other hand a stable operation of the first electro-hydraulic power steering system 21 or the second electro-hydraulic power steering system 22 is ensured.
In some embodiments, a first oil supply line is provided between the first steering oil pump 31 and the first electro-hydraulic power steering gear 21. A second oil supply line is arranged between the second steering oil pump 32 and the second electro-hydraulic power steering gear 22. The redundant assembly 4 further includes a communication line 41 for communicating the first oil supply line with the second oil supply line, and an electromagnetic proportional valve 42 provided on the communication line 41.
Referring to fig. 3, after step S10, the method further includes:
s11: when any one of the first steering oil pump 31 and the second steering oil pump 32 fails, the control electromagnetic proportional valve 42 is opened.
S12: the opening degree of the electromagnetic proportional valve 42 is adjusted so that the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 work normally.
When the first steering oil pump 31 and the second steering oil pump 32 fail, the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 cannot obtain hydraulic oil, and thus cannot work normally. Therefore, in the present embodiment, when one of the first steering oil pump 31 and the second steering oil pump 32 fails, the electromagnetic proportional valve 42 is controlled to open, so as to communicate the first oil supply line with the second oil supply line, so that the other one of the first steering oil pump 31 and the second steering oil pump 32 supplies oil to the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 at the same time, and it is ensured that the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22 work normally.
In this application, make first electricity liquid power assisted steering ware 21 through setting up the energy supply piece, second electricity liquid power assisted steering ware 22, first oil pump 31 and the second oil pump 32 that turns to can work of turning to, when the energy supply piece breaks down, first electricity liquid power assisted steering ware 21, second electricity liquid power assisted steering ware 22, first oil pump 31 and the second oil pump 32 that turns to will be unable work equally, consequently still be provided with corresponding redundant energy supply piece in this application, thereby guarantee first electricity liquid power assisted steering ware 21, second electricity liquid power assisted steering ware 22, first oil pump 31 and the second oil pump 32 that turns to work's stability of turning to. The energy supply parts include, but are not limited to, the first electro-hydraulic power steering gear 21, the second electro-hydraulic power steering gear 22, the motors and power supplies of the first steering oil pump 31 and the second steering oil pump 32, and the like, and the redundant energy supply parts can be specifically adjusted according to the energy supply parts.
In addition, redundant subassembly 4 still includes redundant communication line to guarantee that controller 5 can stable control energy supply spare and redundant energy supply spare, guarantee that redundant energy supply spare can in time take over the work of energy supply spare. The redundant assembly 4 is further communicated with oil supply pipelines of the first steering oil pump 31 and the second steering oil pump 32 through a communication pipeline 41 and an electromagnetic proportional valve 42, so that when any one of the first steering oil pump 31 and the second steering oil pump 32 fails, the other one of the first steering oil pump 31 and the second steering oil pump 32 can simultaneously supply oil to the first electro-hydraulic power steering gear 21 and the second electro-hydraulic power steering gear 22, and normal operation of the electro-hydraulic power steering system 100 is ensured.
The electronic hydraulic power-assisted steering system 100 provided by the application is designed redundantly on a plurality of layers, so that the working stability of the electronic hydraulic power-assisted steering system 100 is greatly improved, and the potential safety hazards when a vehicle runs are greatly reduced.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An electro-hydraulic power steering system, comprising:
a steering device for driving connection with the wheels;
the electro-hydraulic power steering gear assembly comprises a first electro-hydraulic power steering gear and a second electro-hydraulic power steering gear, and the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear are respectively connected with the steering device so as to drive the wheels to steer;
the steering oil pump assembly comprises a first steering oil pump and a second steering oil pump, and the first steering oil pump is connected with the first electro-hydraulic power steering gear and used for supplying oil to the first electro-hydraulic power steering gear; the second steering oil pump is connected with the second electro-hydraulic power steering gear and used for supplying oil to the second electro-hydraulic power steering gear;
the energy supply assembly comprises a plurality of energy supply pieces, and the plurality of energy supply pieces are used for respectively supplying energy to the first electro-hydraulic power steering gear, the second electro-hydraulic power steering gear, the first steering oil pump and the second steering oil pump so as to respectively enable the first electro-hydraulic power steering gear, the second electro-hydraulic power steering gear, the first steering oil pump and the second steering oil pump to work; and the number of the first and second groups,
the redundancy assembly comprises a plurality of redundancy energy supply pieces in one-to-one correspondence with the energy supply pieces, each redundancy energy supply piece is configured to be backup with the corresponding energy supply piece, and when the corresponding energy supply piece fails, the redundancy energy supply piece takes over the work of the corresponding energy supply piece.
2. The electro-hydraulic power steering system of claim 1, wherein the plurality of power supply members includes two first power supplies and two high voltage power supplies, the two first power supplies being configured to provide power to the first electro-hydraulic power steering device and the second electro-hydraulic power steering device, respectively;
the two high-voltage power supplies are used for respectively providing electric power for the first steering oil pump and the second steering oil pump;
the plurality of redundant energy supply pieces comprise two second power supplies in one-to-one correspondence with the first power supplies and two low-voltage power supplies in one-to-one correspondence with the high-voltage power supplies;
each second power supply is used for supplying power to the first electro-hydraulic power steering gear or the second electro-hydraulic power steering gear when the corresponding first power supply fails;
each of the low-voltage power supplies is configured to supply electric power to the first steering oil pump or the second steering oil pump when the corresponding high-voltage power supply fails.
3. The electro-hydraulic power steering system of claim 1, wherein the plurality of energy supply members further comprises two first motors, and the two first motors are used for being in driving connection with the worm of the first electro-hydraulic power steering gear and the worm of the second electro-hydraulic power steering gear respectively;
the plurality of redundant energy supply parts comprise two second motors which are arranged corresponding to the two first motors, and each second motor is used for driving the worm of the first electro-hydraulic power steering gear or the worm of the second electro-hydraulic power steering gear to rotate when the corresponding first motor fails.
4. The electro-hydraulic power steering system of claim 1, wherein a first oil supply line is provided between the first steering oil pump and the first electro-hydraulic power steering gear;
a second oil supply pipeline is arranged between the second steering oil pump and the second electro-hydraulic power steering gear;
redundant subassembly is still including the intercommunication first supply oil pipe way with the second supplies oil pipe way the intercommunication pipeline and locates electromagnetism proportional valve on the intercommunication pipeline, electromagnetism proportional valve is used for first turn to the oil pump and open when the second turns to arbitrary trouble in the oil pump, with the intercommunication first supply oil pipe way with the second supplies oil pipe way.
5. The electro-hydraulic power steering system according to claim 1, further comprising a controller, wherein a communication line is provided between the controller and each of the energy supplying members, the controller is configured to receive operation information of each of the energy supplying members and control the corresponding redundant energy supplying member to operate when the operation information is abnormal;
the redundant subassembly still include with many redundant communication lines that communication line one-to-one set up, each redundant communication line is used for making when corresponding communication line trouble makes the correspondence energy supply spare with keep being connected between the controller.
6. The electro-hydraulic power steering system of claim 1, wherein the steering device comprises a first steering axle, a first steering drive axle, a second steering axle and a second steering drive axle, the first steering drive axle, the second steering axle and the second steering drive axle being configured to be drivingly connected to the wheels, respectively;
the electro-hydraulic power steering gear assembly further comprises a third electro-hydraulic power steering gear and a fourth electro-hydraulic power steering gear, and the first electro-hydraulic power steering gear is in driving connection with the first steering axle; the second electro-hydraulic power steering gear is in driving connection with the first steering drive axle; the third electro-hydraulic power steering gear is in driving connection with the second steering axle, and the fourth electro-hydraulic power steering gear is in driving connection with the second steering drive axle;
the steering oil pump assembly further comprises a third steering oil pump and a fourth steering oil pump, and the third steering oil pump is communicated with the third electro-hydraulic power steering gear so as to supply oil to the third electro-hydraulic power steering gear; and the fourth steering oil pump is communicated with the fourth electro-hydraulic power steering gear to supply oil to the fourth electro-hydraulic power steering gear.
7. A vehicle characterized by comprising an electro-hydraulic power steering system according to any one of claims 1 to 6.
8. A control method, applied to a vehicle according to claim 7, comprising:
monitoring the working state of each energy supply part;
when the energy supply parts are in failure, the corresponding redundant energy supply parts are controlled to work.
9. The control method according to claim 8, wherein the plurality of energy supply members includes two first power sources and two high-voltage power sources, the two first power sources are used for respectively supplying power to the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear; the two high-voltage power supplies are used for respectively supplying power to the first steering oil pump and the second steering oil pump; the redundant energy supply pieces comprise two second power supplies which correspond to the two first power supplies one by one and two low-voltage power supplies which correspond to the two high-voltage power supplies one by one;
when energy supply spare trouble, control corresponds redundancy energy supply spare work specifically includes:
when the first power supply fails, controlling the second power supply corresponding to the failed first power supply to work;
and when the high-voltage power supply fails, controlling the low-voltage power supply corresponding to the failed high-voltage power supply to work.
10. The control method according to claim 8, characterized in that a first oil supply line is provided between the first steering oil pump and the first electro-hydraulic power steering gear; a second oil supply pipeline is arranged between the second steering oil pump and the second electro-hydraulic power steering gear; the redundant assembly further comprises a communication pipeline for communicating the first oil supply pipeline with the second oil supply pipeline and an electromagnetic proportional valve arranged on the communication pipeline;
after the operating condition of monitoring each energy supply piece, still include:
when any one of the first steering oil pump and the second steering oil pump fails, controlling the electromagnetic proportional valve to be opened;
and adjusting the opening degree of the electromagnetic proportional valve so as to enable the first electro-hydraulic power steering gear and the second electro-hydraulic power steering gear to work normally.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372022A (en) * | 2010-08-26 | 2012-03-14 | 长沙中联重工科技发展股份有限公司 | Multi-axle vehicle as well as electro-hydraulic servo steering system and steering control method thereof |
| CN102490781A (en) * | 2011-12-01 | 2012-06-13 | 中联重科股份有限公司 | Steering system and steering method of engineering vehicle |
| CN202518339U (en) * | 2012-01-13 | 2012-11-07 | 中联重科股份有限公司 | Engineering machinery vehicle and vehicle steering system |
| CN109305219A (en) * | 2018-09-27 | 2019-02-05 | 安徽德孚转向系统股份有限公司 | Electric hydraulic power-assisted steering system suitable for new-energy automobile |
| CN209241163U (en) * | 2018-11-21 | 2019-08-13 | 比亚迪股份有限公司 | Steering boost system and electric car |
| US20190329819A1 (en) * | 2016-12-27 | 2019-10-31 | Xuzhou Heavy Machinery Co., Ltd. | Steering control system and method as well as crane |
| CN209870491U (en) * | 2019-02-02 | 2019-12-31 | 北京奥特尼克科技有限公司 | Electrohydraulic steering gear with redundant motor for advanced automatic driving tool |
| CN112208631A (en) * | 2020-10-22 | 2021-01-12 | 北京航天发射技术研究所 | Electro-hydraulic steering system with double oil sources |
| CN112793659A (en) * | 2021-03-05 | 2021-05-14 | 南京经纬达汽车科技有限公司 | Redundant steering system with dual purposes of autonomous steering and power assisting and control method thereof |
| CN112918552A (en) * | 2021-03-25 | 2021-06-08 | 福州大学 | Heavy multi-axle vehicle steering system based on hydraulic transformer and control method thereof |
| CN213534838U (en) * | 2020-09-28 | 2021-06-25 | 何姗 | New energy commercial vehicle steering power-assisted redundancy device |
| CN113788068A (en) * | 2021-09-07 | 2021-12-14 | 北京航天发射技术研究所 | Multimode electro-hydraulic all-wheel steering system for special vehicle and control method |
| WO2021249223A1 (en) * | 2020-06-11 | 2021-12-16 | 中国第一汽车股份有限公司 | Redundant mechanism steer-by-wire device and control method |
-
2022
- 2022-09-06 CN CN202211084150.6A patent/CN115257918B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372022A (en) * | 2010-08-26 | 2012-03-14 | 长沙中联重工科技发展股份有限公司 | Multi-axle vehicle as well as electro-hydraulic servo steering system and steering control method thereof |
| CN102490781A (en) * | 2011-12-01 | 2012-06-13 | 中联重科股份有限公司 | Steering system and steering method of engineering vehicle |
| CN202518339U (en) * | 2012-01-13 | 2012-11-07 | 中联重科股份有限公司 | Engineering machinery vehicle and vehicle steering system |
| US20190329819A1 (en) * | 2016-12-27 | 2019-10-31 | Xuzhou Heavy Machinery Co., Ltd. | Steering control system and method as well as crane |
| CN109305219A (en) * | 2018-09-27 | 2019-02-05 | 安徽德孚转向系统股份有限公司 | Electric hydraulic power-assisted steering system suitable for new-energy automobile |
| CN209241163U (en) * | 2018-11-21 | 2019-08-13 | 比亚迪股份有限公司 | Steering boost system and electric car |
| CN209870491U (en) * | 2019-02-02 | 2019-12-31 | 北京奥特尼克科技有限公司 | Electrohydraulic steering gear with redundant motor for advanced automatic driving tool |
| WO2021249223A1 (en) * | 2020-06-11 | 2021-12-16 | 中国第一汽车股份有限公司 | Redundant mechanism steer-by-wire device and control method |
| CN213534838U (en) * | 2020-09-28 | 2021-06-25 | 何姗 | New energy commercial vehicle steering power-assisted redundancy device |
| CN112208631A (en) * | 2020-10-22 | 2021-01-12 | 北京航天发射技术研究所 | Electro-hydraulic steering system with double oil sources |
| CN112793659A (en) * | 2021-03-05 | 2021-05-14 | 南京经纬达汽车科技有限公司 | Redundant steering system with dual purposes of autonomous steering and power assisting and control method thereof |
| CN112918552A (en) * | 2021-03-25 | 2021-06-08 | 福州大学 | Heavy multi-axle vehicle steering system based on hydraulic transformer and control method thereof |
| CN113788068A (en) * | 2021-09-07 | 2021-12-14 | 北京航天发射技术研究所 | Multimode electro-hydraulic all-wheel steering system for special vehicle and control method |
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