CN205168619U - Car front wheel independent control hydrostatic steering system with redundant function - Google Patents
Car front wheel independent control hydrostatic steering system with redundant function Download PDFInfo
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- CN205168619U CN205168619U CN201520922695.9U CN201520922695U CN205168619U CN 205168619 U CN205168619 U CN 205168619U CN 201520922695 U CN201520922695 U CN 201520922695U CN 205168619 U CN205168619 U CN 205168619U
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Abstract
The utility model discloses a car front wheel independent control hydrostatic steering system with redundant function. The device is by steering wheel module (21), hydraulic transmission system (18), hydrostatic steering executable module (15), electronic control module (13), steering wheel (1), steering spindle (2), gear (19), rack (3), piston (20), hydraulic cylinder (4), oil pipe (6), flow control valve (17), electric T -shaped valve (7), carry out hydro -cylinder (8), electromagnetic control device (9), compensation oil tank (10), bang -bang control valve (14), tie rod (16), ecu (12), rotary angle transmitter (22), torque sensor (5), automatically controlled pencil (11) are constituteed. The changeable advantage of device make full use of hydraulic drive direction has realized that the front wheel independently turns to and the accurate control. Control system produces the trouble, controls the directive wheel through the connection messenger steering wheel power of hydraulic pressure route is direct, has fault -tolerant function.
Description
Technical field
The utility model belongs to Automotive Steering Technology field.Be specifically related to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature.Specifically can apply but not only be applied to the Heavy Duty Commercial Cars such as SUV or heavy motor vehicle.
Background technology
Wire-controlled steering system has that speed of response is fast, traveling comfort good, control is accurate, takies the advantages such as interior space is few.
Fault Tolerance Control Technology and road feel analog technology are two large gordian techniquies of current wire-controlled steering system.For faults-tolerant control, existing wire-controlled steering system generally takes the method for hardware and software to realize redundancy feature, namely by backing up vitals and easy et out of order parts, and is undertaken fault-tolerant by software control.But although a set of steering swivel system for subsequent use can realize redundancy feature, its hardware layout is complicated, and cost is higher, and hardware utilization is low.For road feel simulation, existing wire-controlled steering system takes motor simulation road feel more, but steering wheel return positive moment power of motor about 50 ~ 80W, power supply load is heavier.
It take hydraulic pressure as the wire-controlled steering system of medium that the utility model discloses a kind of.Having steer by wire apparatus variable-speed ratio, be easy to arrange, traveling comfort is good etc. that advantage simultaneously, also having hydraulic efficiency pressure system can relax impact, and application force such as to stablize at the advantage.The function that electronic control unit controls two-wheeled corner independently can be realized, reduce the sideslip of tire when turning to.
The flow-controlling gate that road feel when native system normally works feds back through in hydraulic circuit controls, and compares traditional feedback motor less energy intensive, reduces the load of battery.Steering wheel torque then is directly passed to wheel flutter to realize by hydraulic efficiency pressure system by the functions of redundancy and fault tolerance of native system.And the oil circuit of two kinds of functions shares, and is switched mutually by electric T-shaped valve.While guarantee systemic-function and reliability, simplified structure, convenient layout, improves part degree of utilization.
Utility model content
The purpose of this utility model is accurately controlled to realize the independent of automobile steering front wheel deflection angle by following measure, and the redundancy feature when steering swivel system fault occurs.For realizing above-mentioned functions, be independently provided with fluid-link steering execution module (15) at left and right wheel flutter place, its main drive element is electromagnetic control apparatus (9), piston and execution oil cylinder (8).When wire-controlled steering system normally works, chaufeur is by bearing circle module (21) input angular signal, analyze among signal input electronic control unit (12), process, and the stroke of independently control plunger, drive the movement of tierod (16), complete the accurate control of wheel flutter drift angle.And when wire-controlled steering system produces fault, under the control action of electric T-shaped valve (7), make the power of bearing circle (1) by power hydraulic system (18) access fluid-link steering execution module (15) by the connection of oil circuit, directly wheel flutter is controlled, to complete the realization of redundancy feature.
This has the vehicle front independence hydraulic control steering swivel system of redundancy feature, its composition comprises bearing circle module (21), power hydraulic system (18), fluid-link steering execution module (15), ECU electronic control unit (13), bearing circle (1), steering shaft (2), gear (19), tooth bar (3), piston (20), hydraulic ram (4), oil pipe (6), flow-controlling gate (17), electric T-shaped valve (7), perform oil cylinder (8), electromagnetic control apparatus (9), compensate fuel tank (10), on-off control valve (14), tierod (16), electronic control unit (12), rotary angle transmitter (22), torque sensor (5), automatically controlled wire harness (11).Bearing circle module (21) is connected with torque sensor (5) and rotary angle transmitter (22), in order to accept angle signal that bearing circle (1) inputs and moment size.The signal of torque sensor (5) and rotary angle transmitter (22) is entered electronic control unit (12) by automatically controlled wire harness (11) transmission and is carried out analytical calculation, and then import in fluid-link steering execution module (15), it is controlled, completes the accurate control to left and right two-wheeled corner.Bearing circle module (21) is connected by the cooperation of piston (20) with hydraulic ram (4) with power hydraulic system (18), realizes the input of hydraulic power.Meanwhile, power hydraulic system (18) is connected with fluid-link steering execution module (15) by oil pipe (6).
In some embodiments, wherein in bearing circle module (21), comprise steering shaft (2), gear (19), tooth bar (3), piston (20); Steering shaft (2) is connected by welding process with gear (19), and gear (19) is meshed with tooth bar (3); Two pistons (20) in left and right are connected by screw thread, and along with the rotation of gear (19), tooth bar (3) cross travel, drives the side-to-side movement of two pistons (20) simultaneously.By bearing circle module (21), gyroscopic movement is changed into the movement of rectilinear direction, achieve the input of signal, power in whole process and feed back stressed output.
In some embodiments, wherein power hydraulic system (18) is a C/LOOP; Pass through oil pipe (6) in hydraulic circuit by hydraulic ram (4), electric T-shaped valve (7), flow-controlling gate (17) are connected; Completed the realization of two kinds of functions by this device: when separate control lines control steering swivel system normally works, bearing circle (1) rotates, and makes gear (19) be with carry-over bar (3) to promote piston (20) mobile.Set up oil pressure in loop in power hydraulic system (18), hydraulic oil flows wherein.At this moment, by the control of electronic control unit (12) to the aperture of flow-controlling gate (17), oil pressure resistance is regulated, feedback hand-power is provided.When wire-controlled steering system et out of order, control electric T-shaped valve (7), power hydraulic system (18) is made to access in fluid-link steering execution module (15), oil pressure is had owing to setting up in loop when bearing circle (1) rotates, power directly inputs and performs in oil cylinder (8), complete the control to wheel flutter, ensure that system continues trouble free service.
In some embodiments, wherein fluid-link steering execution module (15) comprises left and right two execution oil cylinder (8).Be equipped with piston in oil cylinder and be divided into two parts, being wherein full of hydraulic oil in the corresponding execution oil cylinder partly of piston crown.Electromagnetic control apparatus (9) and piston head are threaded connection, and the displacement of both transverse shiftings is identical.The principle of electromagnetic control apparatus (9) is: when by the curent change of electromagnetic control apparatus (9), and in device, the suction size of electromagnet, direction change, and the stroke of device is changed, realizes adjustable function.Electronic control unit (12) is connected with electromagnetic control apparatus (9) by automatically controlled wire harness (11), the optimum deflection angle that computing obtains and best stroke are converted to electric signal by it and input in electromagnetic control apparatus (9), realize the accurate control to it.
Left and right two execution oil cylinders are connected to and compensate fuel tank (10).Connecting valve formula control cock (14) between execution oil cylinder (8) and compensation fuel tank (10).Along with piston is along the movement performed in oil cylinder (8), compensate the hydraulic oil turnover oil cylinder in fuel tank (10), with the volume change of hydraulic oil in compensating cylinder; When redundancy feature realizes, on-off control valve (14) cuts out, and the compensating action compensating fuel tank (10) disappears, and the piston performed in oil cylinder (8) is promoted by oil pressure, stroke is changed, realizes faults-tolerant control.
In some embodiments, wherein fluid-link steering execution module (15), the piston rod in piston is connected with tierod (16) by ball pivot; Tierod (16) is connected by ball pivot with track arm simultaneously; When piston rod transverse shifting, drive tierod (16) mobile, promote steering swivel simultaneously and rotate, to realize steering procedure.When redundancy feature realizes, more smooth-going for making in the process that turns to, the length of the position of execution module (15), tierod (16) is turned to during design, the length of track arm should by Ackermann steering geometric design, make its keep when wire-controlled steering system lost efficacy ideal in foreign steamer angle relation.
In some embodiments, wherein ECU electronic control unit (13), when separate control lines control steering swivel system normally works, electronic control unit (12) accepts the signal from rotary angle transmitter (22) and torque sensor (5); By the process to rotary angle transmitter (22) signal, and the analytical calculation of data with existing, obtain the stroke of the electromagnetic control apparatus (9) of fluid-link steering execution module (15), and it is controlled, and then complete the independent accurately control of wheel flutter deflection angle; By the process to torque sensor (5) signal, the size of chaufeur hand-power feedback moment is obtained by analytical calculation, control flow check control valve (17) aperture regulates the adjustment realized the oil pressure in power hydraulic system (18), and then simulates feedback hand-power.
Accompanying drawing explanation
Drawings illustrate a kind of structure and the principle schematic with the vehicle front independence hydraulic control steering swivel system of redundancy feature.
Fig. 1 is the general illustration that the utility model has the vehicle front independence hydraulic control steering swivel system of redundancy feature.
Fig. 2 is the graphics that the utility model has the vehicle front independence hydraulic control steering swivel system of redundancy feature.
Fig. 3 is the graphics that the utility model has fluid-link steering execution module in the vehicle front independence hydraulic control steering swivel system of redundancy feature.
Fig. 4 is that the utility model has wire-controlled apparatus operating diagram in the vehicle front independence hydraulic control steering swivel system of redundancy feature.
Fig. 5 is the vehicle front independence hydraulic control steering swivel system oil circuit schematic diagram in normal operation that the utility model has redundancy feature.
Fig. 6 is the oil circuit schematic diagram of vehicle front independence hydraulic control steering swivel system under redundancy feature that the utility model has redundancy feature.
Fig. 7 is the Dominating paths line chart that the utility model has electronic control unit in the vehicle front independence hydraulic control steering swivel system of redundancy feature.
Detailed description of the invention
Shown in accompanying drawing 1 and accompanying drawing 2, the utility model is a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature.This system is by bearing circle module (21), power hydraulic system (18), fluid-link steering execution module (15), ECU electronic control unit (13), bearing circle (1), steering shaft (2), gear (19), tooth bar (3), piston (20), hydraulic ram (4), oil pipe (6), flow-controlling gate (17), electric T-shaped valve (7), perform oil cylinder (8), electromagnetic control apparatus (9), compensate fuel tank (10), on-off control valve (14), tierod (16), electronic control unit (12), rotary angle transmitter (22), torque sensor (5), automatically controlled wire harness (11) forms.Wherein electric T-shaped valve, on-off control valve (14), rotary angle transmitter, torque sensor can directly be bought from the market and apply.
With reference to shown in accompanying drawing 3, it is the graphics of fluid-link steering execution module (15).Fluid-link steering execution module (15) is made up of execution oil cylinder (8), oil pipe (6), compensation fuel tank (10), electromagnetic control apparatus (9), piston.As accompanying drawing 3, one end of oil pipe (6) is connected with compensation fuel tank (10), and other end access performs in oil cylinder (8), and hydraulic oil flows by oil pipe.Region 1 shown in accompanying drawing 3 is hydraulic oil and is full of region.Electromagnetic control apparatus (9) is designed to be controlled its sense of motion and stroke by electric current, concrete operations for arranging two electromagnet, i.e. electromagnet 1 and electromagnet 2 as shown in the figure.Wherein electromagnet 2 and vehicle frame are connected.By to the control passing into wherein sense of current and size, to change polarity and the size in magnetic field, and then complete the accurate control to stroke directions and size.
With reference to shown in accompanying drawing 4, it is wire-controlled apparatus operating diagram.When bearing circle (1) rotates, rotary angle transmitter (22) receives the angular signal transmitted, and passed through automatically controlled wire harness (11) and import in electronic control unit (12), simultaneously by electronic control unit (12) comprehensive data analysis, the best drift angle calculating steering front wheel, and promote the stroke needed for tierod.Signal is passed in electromagnetic control apparatus (9) by automatically controlled wire harness (11) by electronic control unit (12), realizes the accurate control to miles of relative movement.Meanwhile, obtained the stressed size of feedback of now bearing circle (1) by torque sensor (5), and the flow-controlling gate (17) on this basis in control loop, to change drag size, realize the simulation of road feel feedback.When wire-controlled steering system et out of order, electronic control unit (12) controls electric T-shaped valve (7), power hydraulic system is accessed and performs in oil cylinder (8), directly oil pressure is accessed wherein, and control and compensation fuel tank (10) place's on-off control valve (14) closes.
With reference to shown in accompanying drawing 5, it is system oil circuit schematic diagram in normal operation.Power hydraulic system (18) is made up of hydraulic ram (4), electric T-shaped valve (7), flow-controlling gate (17), oil pipe (6).The adapter path of closed circuit is: the hydraulic ram on the hydraulic ram in left side, left side electric T-shaped valve, flow-controlling gate (17), right side electric T-shaped valve, right side.Beat for bearing circle (1) right side, tooth bar (3) moves right, piston promotes the running of hydraulic power oil in hydraulic ram (4), and in accompanying drawing 5, arrow is running of hydraulic power oil route, through path 2 when hydraulic oil flow to electric T-shaped valve (7).When flow-controlling gate (17) does not work, because load in loop is very little, so feedback hand-power is very little.By the control to flow-controlling gate (17) aperture, oil pressure resistance is changed, realize the control to feedback hand-power.
With reference to shown in accompanying drawing 6, be the oil circuit schematic diagram of system under redundancy feature.When wire-controlled steering system et out of order, when beating with bearing circle (1) right side, the process of right-hand wheel deflection is example, and when redundancy feature realizes, electronic control unit controls electric T-shaped valve (7), and path 2 is disconnected, and path 1 connects.For preventing the hydraulic oil compensated in fuel tank (10), oil pressure foundation is had an impact, on-off control valve (14) is closed, the oil pressure now being moved foundation by piston is accessed through path 1 and performs in oil cylinder (8), perform the stressed movement of oil cylinder (8) piston, realize the control to right hand steering wheel.In like manner, the principle of left side wheels deflection is identical with it, is only the difference in running of hydraulic power oil direction, as shown in accompanying drawing 6 arrow.By the direct control of bearing circle (1) to wheel flutter, to realize functions of redundancy and fault tolerance.In this process, the oil circuit of two kinds of functions shares, and is switched mutually by triple valve.While guarantee systemic-function and reliability, simplified structure, convenient layout, improves part degree of utilization.
With reference to shown in accompanying drawing 7, it is the Dominating paths line chart of System Electronic Control Unit.Electronic control unit receives the signal from steering wheel angle sensor, and by car speed sensor, lateral acceleration sensor, yaw-rate sensor, real-time detection is carried out to vehicle condition, the optimum deflection angle of two wheel flutters is obtained by analytical calculation, control left and right electromagnetic control apparatus of taking turns respectively, complete the control to wheel flutter.Electronic control unit obtains chaufeur hand-power size at a time by steering wheel torque sensor, by analyzing and processing, controls volume control device, to control to adjust chaufeur hand-power feedback.When electronic control unit is by obtaining data analysis process to the sensor, and when finding that electric-control system breaks down, changing pressure direction in hydraulic circuit by controlling electric T-shaped valve, and controlling the closed on-off control valve compensating fuel tank place in time.The realization maintaining turning function is directly controlled, to realize redundancy feature by hydraulicdriven.
Claims (7)
1. one kind has the vehicle front independence hydraulic control steering swivel system of redundancy feature, its composition comprises bearing circle module (21), power hydraulic system (18), fluid-link steering execution module (15), ECU electronic control unit (13), bearing circle (1), steering shaft (2), gear (19), tooth bar (3), piston (20), hydraulic ram (4), oil pipe (6), flow-controlling gate (17), electric T-shaped valve (7), perform oil cylinder (8), electromagnetic control apparatus (9), compensate fuel tank (10), on-off control valve (14), tierod (16), electronic control unit (12), rotary angle transmitter (22), torque sensor (5), automatically controlled wire harness (11), bearing circle module (21) is connected by axle sleeve with torque sensor (5) and rotary angle transmitter (22), elastic conjunction, torque sensor (5) and rotary angle transmitter (22) are connected with electronic control unit (12) by automatically controlled wire harness (11), are entered by signal transmission wherein and carry out analytical calculation, by automatically controlled wire harness (11), electronic control unit (12) is connected with fluid-link steering execution module (15), completes the accurate control to left and right two-wheeled corner, bearing circle module (21) is connected by the cooperation of piston (20) with hydraulic ram (4) with power hydraulic system (18), realizes the input of hydraulic power, meanwhile, power hydraulic system (18) is connected with fluid-link steering execution module (15) by oil pipe (6).
2. according to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature according to claim 1, it is characterized in that: in described bearing circle module (21), comprise steering shaft (2), gear (19), tooth bar (3), piston (20); Steering shaft (2) is connected by welding process with gear (19), and gear (19) is meshed with tooth bar (3); Two pistons (20) in left and right are connected by screw thread, and along with the rotation of gear (19), tooth bar (3) cross travel, drives the side-to-side movement of two pistons (20) simultaneously.
3., according to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature according to claim 1, it is characterized in that: described power hydraulic system (18) is a C/LOOP; Pass through oil pipe (6) in hydraulic circuit by hydraulic ram (4), electric T-shaped valve (7), flow-controlling gate (17) are connected; The realization of two kinds of functions is completed: when separate control lines control steering swivel system normally works by this device, controlled by the aperture of electronic control unit (12) to flow-controlling gate (17), to regulate the size of oil pressure resistance, to play a part to provide feedback hand-power; When wire-controlled steering system et out of order, control electric T-shaped valve (7), power hydraulic system (18) is made to access in fluid-link steering execution module (15), by the control that the power input of bearing circle (1) directly completes wheel flutter, ensure that system continues trouble free service.
4. according to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature according to claim 1, it is characterized in that: described fluid-link steering execution module (15) is made up of execution oil cylinder (8), piston, electromagnetic control apparatus (9), compensation fuel tank (10), on-off control valve (14); Be equipped with piston in left and right two execution oil cylinder (8) and be divided into two parts, being wherein full of hydraulic oil in the corresponding execution oil cylinder (8) partly of piston head; Electromagnetic control apparatus (9) and piston crown are threaded connection, and will together carry out if both carry out transverse shifting; The action principle of this electromagnetic control apparatus (9) is: when the size of current controlling it changes, the stroke of control setup changes; Electronic control unit (12) is attached thereto by automatically controlled wire harness (11), is controlled by it, electromagnetic control apparatus (9) the i.e. accurate control of piston stroke can be realized.
5. according to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature according to claim 4, it is characterized in that: in described fluid-link steering execution module (15), left and right two execution oil cylinder (8) are connected to and compensate fuel tank (10); Connecting valve formula control cock (14) between execution oil cylinder (8) and compensation fuel tank (10); Along with piston is along the movement performed in oil cylinder (8), compensate the hydraulic oil turnover oil cylinder in fuel tank (10), with the volume change of hydraulic oil in compensating cylinder; When redundancy feature realizes, on-off control valve (14) cuts out, and the compensating action compensating fuel tank (10) disappears, and the piston performed in oil cylinder (8) is promoted by oil pressure, realizes the change of stroke, realizes faults-tolerant control.
6. according to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature according to claim 4, it is characterized in that: in described fluid-link steering execution module (15), the piston rod in piston is connected with tierod (16) by ball pivot; Tierod (16) is connected by ball pivot with track arm simultaneously; When piston rod transverse shifting, drive tierod (16) mobile, promote steering swivel simultaneously and rotate, to realize steering procedure.
7. according to a kind of vehicle front independence hydraulic control steering swivel system with redundancy feature according to claim 1, it is characterized in that: in described ECU electronic control unit (13), when separate control lines control steering swivel system normally works, electronic control unit (12) accepts the signal from rotary angle transmitter (22) and torque sensor (5); By the process to rotary angle transmitter (22) signal, and the analytical calculation of data with existing, obtain the stroke of electromagnetic control apparatus (9) in fluid-link steering execution module (15), and it is controlled, and then complete the independent accurately control of wheel flutter deflection angle; By the process to torque sensor (5) signal, the size of chaufeur hand-power feedback moment is obtained by analytical calculation, by the control of flow-controlling gate (17) aperture, realize the adjustment to oil pressure in power hydraulic system (18), and then complete the simulation of road feel feedback.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520922695.9U CN205168619U (en) | 2015-11-18 | 2015-11-18 | Car front wheel independent control hydrostatic steering system with redundant function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520922695.9U CN205168619U (en) | 2015-11-18 | 2015-11-18 | Car front wheel independent control hydrostatic steering system with redundant function |
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| Publication Number | Publication Date |
|---|---|
| CN205168619U true CN205168619U (en) | 2016-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520922695.9U Withdrawn - After Issue CN205168619U (en) | 2015-11-18 | 2015-11-18 | Car front wheel independent control hydrostatic steering system with redundant function |
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| CN (1) | CN205168619U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105313956A (en) * | 2015-11-18 | 2016-02-10 | 吉林大学 | Automotive front wheel independent-control and hydraulic-steering system having redundancy function |
| EP3428050A3 (en) * | 2017-06-22 | 2019-04-03 | Robert Bosch GmbH | Bicycle comprising a hydraulic steering system and method |
| CN110696912A (en) * | 2019-11-22 | 2020-01-17 | 吉林大学 | Multi-mode motor drive steer-by-wire system of passenger vehicle and steering control method thereof |
-
2015
- 2015-11-18 CN CN201520922695.9U patent/CN205168619U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105313956A (en) * | 2015-11-18 | 2016-02-10 | 吉林大学 | Automotive front wheel independent-control and hydraulic-steering system having redundancy function |
| EP3428050A3 (en) * | 2017-06-22 | 2019-04-03 | Robert Bosch GmbH | Bicycle comprising a hydraulic steering system and method |
| CN110696912A (en) * | 2019-11-22 | 2020-01-17 | 吉林大学 | Multi-mode motor drive steer-by-wire system of passenger vehicle and steering control method thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160420 Effective date of abandoning: 20171201 |
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| AV01 | Patent right actively abandoned |