CN105235741A - Automotive variable transmission ratio steering system based on hydraulic system - Google Patents
Automotive variable transmission ratio steering system based on hydraulic system Download PDFInfo
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- CN105235741A CN105235741A CN201510765435.XA CN201510765435A CN105235741A CN 105235741 A CN105235741 A CN 105235741A CN 201510765435 A CN201510765435 A CN 201510765435A CN 105235741 A CN105235741 A CN 105235741A
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Abstract
The invention designs an automotive variable transmission ratio steering system based on a hydraulic system. The system has the advantage of accurate control and can obtain hand power feedback in time. The system is composed of a steering wheel (1), a steering shaft (2), a mechanical driving input module (5), a hydraulic loop module (20), an electromagnetic shunt device assembly (13), an oil way pipeline (17), a steering oil pump (19), an oil pressure sensor (22), an electromagnetic flow control valve (21), a steering execution module (15), a wheel angle sensor (16), an electronic control unit (10), a gear shaft (4), a rack (23), a rotary valve (3), a left power cylinder (18), a right power cylinder (6), a left second-level oil cylinder (14), a right second-level oil cylinder (9), an electromagnetic control device (11), a shunt pot (12), a steering transverse pull rod (8) and a piston (7). By means of control of the electronic control unit and implementation of the electromagnetic shunt device, hydraulic oil amount is adjusted to change the steering transmission ratio, and accurate steering control is achieved.
Description
Technical field
The present invention relates to a kind of steering swivel system based on line control system and hydraulic efficiency pressure system, and transmission ratio-variable, belong to Automotive Steering Technology field.
Background technology
Electronically controlled steering-by-wire has control precisely, is quick on the draw, responds the advantages such as fast, effectively can improve driving performance, improves road-holding property, increases the safety performance of automobile.But due to the restriction of mechanical input, make hand-power feed back the simulation needing additional motor.Therefore the real-time accurate simulation of road feel is become to a large difficult point of steering-by-wire development.
The present invention devises a kind of variable ratio steering system based on hydraulic efficiency pressure system, is combined with hydraulic efficiency gear by mechanical system, obtains accurately abundant ground feedback in time, makes up the deficiency that existing electric line control turns to.By electronic control unit by the control realization Stroke Control independently and accurately to hydraulic circuit oil mass, to play the advantage of steering-by-wire.Hydraulic power system in this device has the advantages that size is little, compact conformation, quality are little, and the shock damping action of fluid can absorb road shocks, improves service life.Obtained popularizing due to hydraulic power-assist steering system and used extensively, relevant production technology and design standard comparatively complete, thus to have higher market realisation in the present invention.
Summary of the invention
The object of the invention is the realization being completed novel variable ratio steering by following measure.Namely making full use of steering-by-wire can the preceence of the force transfering characteristic that turns to of free design vehicle and angle transmission characteristic, and stablize in conjunction with hydrostatic drive, can to go smoothly the advantage of force feedback, control stroke to realize the optimization of two wheel flutters steering wheel angle under any operating mode by electromagnetism part flow arrangement, obtain suitable force feedback simultaneously.Wearing and tearing when turning to can be reduced by this device, reduce resistance, the final road-holding property improving driving.
Should based on the variable ratio steering system of hydraulic efficiency pressure system, its composition comprises bearing circle (1), steering shaft (2), Mechanical Driven load module (5), hydraulic circuit module (20), electromagnetism part flow arrangement assembly (13), oil line pipe (17), power steerig pump (19), oil pressure sensor (22), electromagnetic flow control valve (21), turn to execution module (15), wheel steering angle sensor (16) electronic control unit (10), gear wheel shaft (4), tooth bar (23), rotary valve (3), left power cylinder (18), right power cylinder (6), left two-level oil cylinder (14), right two-level oil cylinder (9), electromagnetic control apparatus (11), dividing pot (12), tierod (8), piston (7) is formed, wherein, bearing circle (1), steering shaft (2) carries out axle with Mechanical Driven load module (5) by spline and is connected, and hydraulic circuit module (20) is connected with Mechanical Driven load module (5) by oil line pipe, turn to one end of execution module (15) to be bolted on vehicle frame, power steerig pump (19) is connected with hydraulic circuit, is bolted on vehicle frame, piston rod in electromagnetism part flow arrangement assembly (13) is connected with turning to execution module (15) by screw thread, and undertaken locking by screw thread fastening glue, be connected with Mechanical Driven load module (5) by two oil line pipes (17).
In some embodiments, wherein in Mechanical Driven load module (5), by spline, steering shaft (2) is connected with gear wheel shaft (4), its middle rack (23) engages with gear (4), and is connected with piston (7) by tooth bar (23) by interference fit; Device has left power cylinder (18) and right power cylinder (6), and hydraulic piston is assemblied among power cylinder, and is designed to given shape and size; Oil line pipe (17) is connected with left and right power cylinder (18) (6) and is fixed by oil pipe geometrical clamp.
In some embodiments, wherein hydraulic circuit module (20) is made up of 7 oil line pipes and oil pipe 1 to oil pipe 7, and wherein 3 form complete C/LOOP; C/LOOP adapter path is: power steerig pump (19), oil pressure sensor (22), rotary valve (3), power steerig pump (19).From rotary valve (3), connect two oil pipes be connected with left power cylinder (18) and right power cylinder (6) respectively; Separately connect two oil pipes from left power cylinder (18) and right power cylinder (6) to be connected with the execution module (15) that turns to of arranged on left and right sides respectively; All oil circuits connect all to be fixed by geometrical clamp; Oil circuit fuel feeding is permanent current state.The converting electric energy of input, using power steerig pump (19) as the energy supply device of system power-assisted, is mechanical energy by motor, the oil in hydraulic circuit module (20) is circulated by this system.Rotated by bearing circle (1) and control rotary valve, realize the control to oil circuit opening and closing, make to produce pressure in oil circuit, promote piston (7) motion to realize power-steering effect.Controlled the aperture of electromagnetic flow control valve (21) by ECU electronic control unit (10), with the flow of fuel feeding in oil circuit control, and then realize the control to power-assisted size, to obtain excellent force transfering characteristic
In some embodiments, wherein electromagnetism part flow arrangement assembly (13) is by electromagnetic control apparatus (11), dividing pot (12), two-level oil cylinder (9) (14), piston forms, controlled by electronic control unit (10), electronic control unit (10) passes through associated sensor (wheel steering angle sensor (16), oil pressure sensor (22) etc.) the data analysis process that obtains, determine the size obtaining electromagnetism part flow arrangement fractional flow, control stroke size, finally to realize the accurate control of steering swivel system transmission ratio-variable and wheel steering angle.When this device is not had an effect, piston in Mechanical Driven load module (5) is on a left side, the stroke of right two power cylinders is identical, piston in the two-level oil cylinder (14) of thus side is upheld, and the piston simultaneously in opposite side two-level oil cylinder (9) shrinks with identical displacement.In this process, steering swivel system completes main turning function with the will of chaufeur.Hydraulic oil in normal pressure oil circuit can flow in electromagnetism part flow arrangement assembly (13).Device accepts the control signal that electronic control unit (10) transmits, dividing pot (12) volume is changed by electromagnetic control apparatus (11), thus the hydraulic oil delivery quality in two-level oil cylinder is regulated, namely regulate the stroke of the piston in cylinder
In some embodiments, wherein turn to execution module (15) to adopt two-level oil cylinder to promote vehicle wheel rotation, wherein two-level oil cylinder is as a part for electromagnetism part flow arrangement assembly (13); Two-level oil cylinder and wheel are connected by tierod (8), and two place's joints use ball pivots and plug to play the be connected change of stroke of bolt the displacement of intermediate rod is changed, and then realization controls the independence of two-wheeled deflection angle.The Secondary Control that this device coordinates electromagnetism part flow arrangement to carry out makes to obtain best interior foreign steamer angle relation in motor turning process, makes to turn to smooth-going, to improve the road-holding property that vehicle travels.Due to the restriction breaking away from physical construction, thus one-sided corner of taking turns can reach ± 70 degree.Vehicular turn is more flexible
Accompanying drawing explanation
Drawings illustrate a kind of structural representation of the variable automobile transmitting ratio steering swivel system based on hydraulic efficiency pressure system
Fig. 1 is the general illustration of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Fig. 2 is the part sectional view of the Mechanical Driven load module of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Fig. 3 is the hydraulic circuit module 3-D view of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Fig. 4 is the hydraulic circuit module schematic diagram of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Fig. 5 is the part sectional view of the electromagnetism part flow arrangement of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Fig. 6 be the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system turn to execution module 3-D view, it is for Length discrepancy double wishbone suspension
Fig. 7 is the power transmission line schematic diagram of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Fig. 8 is the electronic control system Dominating paths line chart of the variable automobile transmitting ratio steering swivel system that the present invention is based on hydraulic efficiency pressure system
Detailed description of the invention
With reference to shown in accompanying drawing 1, the present invention is the variable automobile transmitting ratio steering swivel system based on hydraulic efficiency pressure system.This device forms by with lower part: bearing circle (1), steering shaft (2), Mechanical Driven load module (5), hydraulic circuit module (20), electromagnetism part flow arrangement assembly (13), oil line pipe (17), power steerig pump (19), oil pressure sensor (22), electromagnetic flow control valve (21), turn to execution module (15), wheel steering angle sensor (16) electronic control unit (10), gear wheel shaft (4), tooth bar (23), rotary valve (3), left power cylinder (18), right power cylinder (6), left two-level oil cylinder (14), right two-level oil cylinder (9), electromagnetic control apparatus (11), dividing pot (12), tierod (8), piston (7) is formed.Wherein bearing circle, power steerig pump and related sensor can commercially be purchased.
With reference to shown in accompanying drawing 2, Mechanical Driven load module (5) is by gear wheel shaft (4), and tooth bar (23), left power cylinder (18), right power cylinder (6), piston (7) forms.Torque, by steering wheel rotation, is passed through in steering shaft (2) input media by chaufeur.By gear (4) band carry-over bar (23), make it produce the motion of rectilinear direction, drive piston rod to promote piston (7) motion.By above process, thus power is made to spread out of this device by oil pressure.Power cylinder is provided with into and out of hydraulic fluid port, by the foundation of oil pressure, realizes power-steering afterburner process.
Shown in accompanying drawing 3 and accompanying drawing 4, hydraulic circuit module (20) is made up of 7 oil line pipes and oil pipe 1 to oil pipe 7, and wherein 3 form complete C/LOOP; C/LOOP adapter path is: power steerig pump (19), oil pipe 2, oil pressure sensor (22), oil pipe 3, rotary valve (3), oil pipe 1, power steerig pump (19).From rotary valve (3), connect oil pipe 4 be connected with left power cylinder (18), connect oil pipe 5 and be connected with right power cylinder (6); Connect oil pipe 6, oil pipe 7 from left power cylinder (18) and right power cylinder (6) to be connected with two-level oil cylinder (9) (14) of arranged on left and right sides respectively; All oil circuits connect all to be fixed by geometrical clamp; Oil circuit fuel feeding is permanent current state.When rotary valve (3) rotates with bearing circle (1), by the opening and closing of oil circuit control, build-up pressure is poor, and piston is moved in the horizontal direction, to play power steering.Controlled the aperture of electromagnetic flow control valve by ECU electronic control unit, with the flow of fuel feeding in oil circuit control, and then realize the control to power-assisted size.
With reference to shown in accompanying drawing 5, electromagnetism part flow arrangement (13) is by electromagnetic control apparatus (11), and dividing pot (12), two-level oil cylinder (9) (14), piston (7) forms.Electronic control unit, by the data analysis process obtained associated sensor (comprising steering wheel angle variable quantity, the speed of a motor vehicle and engine speed, working oil path mode of operation etc.), determines the shift motion obtaining electromagnetic control apparatus (11).As figure, electromagnetic control apparatus is by current control, and shift motion size is determined by size of current.By changing stroke adjustment dividing pot (12) internal volume size, and then shunting oil mass size in control setup.The final purpose of this device is the control realized piston stroke in two-level oil cylinder (9) (14), realizes Secondary Control.
With reference to shown in accompanying drawing 6, turn to execution module (15) to adopt two-level oil cylinder (9) (14) to promote vehicle wheel rotation, wherein two-level oil cylinder (9) (14) are as a part for electromagnetism part flow arrangement assembly (13).Two-level oil cylinder (9) (14) are connected by tierod (8) with wheel, and two place's joints use ball pivot and plug to play bolt and are connected.When piston is promoted to produce mobile by oil pressure, piston rod transverse shifting, drive tierod (8) mobile, thus promote track arm, wheel flutter is deflected, handling maneuver realizes.
With reference to shown in accompanying drawing 7, it is the power transmission line schematic diagram of this device.Electronic control unit accepts the signal (comprising steering wheel angle variable quantity, the speed of a motor vehicle and engine speed, working oil path mode of operation etc.) that each sensor transmits, control, change the aperture of electromagnetic flow control valve accordingly, thus the size of the middle power steering of adjustment Mechanical Driven load module (5).When bearing circle (1) is turned right, rotary valve (3) controls to produce difference of pressure, high pressure on the right side of oil line pipe, left side low pressure, high pressure oil injects, normal pressure wet goods amount flows out and makes left and right two power cylinders (18) (6) stroke identical, and the difference of pressure that two power cylinders (18) (6) produce is sent to via oil line pipe (17) two-level oil cylinder (9) (14) of system end.Piston movement under force in two-level oil cylinder (9) (14), drives tierod to complete and turns to.
With reference to shown in accompanying drawing 8, it is electronic control unit Dominating paths line chart.Now the expectation direction information comprehensive end rotation angular sensing information calculated is carried out analytic operation by electronic control unit, draws Liang Ge two-level oil cylinder best stroke separately.By controlling the volume of dividing pot in electromagnetism part flow arrangement assembly, to interfere the stroke of piston in Liang Ge two-level oil cylinder, control wheel turning angle.By realizing the optimization of two wheel flutters steering wheel angle under any operating mode, to reduce wear on tyres and waste of power.Simultaneously by the control to electromagnetic flow control valve, to realize the control to power-assisted size.
Claims (6)
1. the variable automobile transmitting ratio steering swivel system based on hydraulic efficiency pressure system, comprise bearing circle (1), steering shaft (2), Mechanical Driven load module (5), hydraulic circuit module (20), electromagnetism part flow arrangement assembly (13), oil line pipe (17), power steerig pump (19), oil pressure sensor (22), electromagnetic flow control valve (21), turn to execution module (15), wheel steering angle sensor (16) electronic control unit (10), gear wheel shaft (4), tooth bar (23), rotary valve (3), left power cylinder (18), right power cylinder (6), left two-level oil cylinder (14), right two-level oil cylinder (9), electromagnetic control apparatus (11), dividing pot (12), tierod (8), piston (7) is formed, it is characterized in that, bearing circle (1), steering shaft (2) carries out axle with Mechanical Driven load module (5) by spline and is connected, and hydraulic circuit module (20) is connected with Mechanical Driven load module (5) by oil line pipe, turn to one end of execution module (15) to be bolted on vehicle frame, power steerig pump (19) is connected with hydraulic circuit, is bolted on vehicle frame, piston rod in electromagnetism part flow arrangement assembly (13) is connected with turning to execution module (15) by screw thread, and undertaken locking by screw thread fastening glue, be connected with Mechanical Driven load module (5) by two oil line pipes (17).
2. according to variable automobile transmitting ratio steering swivel system according to claim 1, it is characterized in that: in described Mechanical Driven load module (5), by spline, steering shaft (2) is connected with gear wheel shaft (4), its middle rack (23) engages with gear (4), and is connected with piston (7) by tooth bar (23) by interference fit; Device has left power cylinder (18) and right power cylinder (6), and hydraulic piston is assemblied among power cylinder, and is designed to given shape and size; Oil line pipe (17) is connected with left and right power cylinder and is fixed by oil pipe geometrical clamp.
3. according to variable automobile transmitting ratio steering swivel system according to claim 1, it is characterized in that: described hydraulic circuit module (20) is made up of 7 oil line pipes (17), wherein 3 form complete C/LOOP; C/LOOP adapter path is: power steerig pump (19), oil pressure sensor (22), rotary valve (3), power steerig pump (19); From rotary valve (3), connect two oil pipes be connected with left power cylinder (18) and right power cylinder (6) respectively; Separately connect two oil pipes from left power cylinder (18) and right power cylinder (6) to be connected with the execution module (15) that turns to of arranged on left and right sides respectively; All oil circuits connect all to be fixed by geometrical clamp; Oil circuit fuel feeding is permanent current state.
4. according to variable automobile transmitting ratio steering swivel system according to claim 1, it is characterized in that: described electromagnetism part flow arrangement assembly (13) comprises two-level oil cylinder (9) (14) that can hold reciprocating motion of the pistons; Its with turn to execution module (15) combined action, make wheel hard-over scope to ± 70 ° owing to there is no steering hardware structural limitations.
5. according to variable automobile transmitting ratio steering swivel system according to claim 4, it is characterized in that: described electromagnetism part flow arrangement assembly (13) is by electromagnetic control apparatus (11), dividing pot (12), two-level oil cylinder (9) (14), piston (7) forms, controlled by electronic control unit (10), electronic control unit (10) passes through associated sensor (wheel steering angle sensor (16), oil pressure sensor (22) etc.) the data analysis process that obtains, determine the size obtaining electromagnetism part flow arrangement fractional flow, control stroke size, finally to realize the accurate control of steering swivel system transmission ratio-variable and wheel steering angle.
6. according to variable automobile transmitting ratio steering swivel system according to claim 1, it is characterized in that: the described execution module (15) that turns to adopts two-level oil cylinder to promote vehicle wheel rotation, and wherein two-level oil cylinder (9) (14) are as a part for electromagnetism part flow arrangement assembly (13); Two-level oil cylinder (9) (14) are connected by tierod (8) with wheel, and two place's joints use ball pivot and plug to play bolt and are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765435.XA CN105235741B (en) | 2015-11-11 | 2015-11-11 | A kind of variable automobile gearratio steering based on hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510765435.XA CN105235741B (en) | 2015-11-11 | 2015-11-11 | A kind of variable automobile gearratio steering based on hydraulic system |
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| Publication Number | Publication Date |
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| CN105235741A true CN105235741A (en) | 2016-01-13 |
| CN105235741B CN105235741B (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510765435.XA Expired - Fee Related CN105235741B (en) | 2015-11-11 | 2015-11-11 | A kind of variable automobile gearratio steering based on hydraulic system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107310674A (en) * | 2017-06-23 | 2017-11-03 | 山东巴士新能源车业有限公司 | A kind of steering control system applied to electric vehicle |
| CN108896425A (en) * | 2018-05-14 | 2018-11-27 | 吉林大学 | A kind of high-speed overload friction-wear detecting apparatus and its test 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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| JP2008094288A (en) * | 2006-10-13 | 2008-04-24 | Hitachi Ltd | Steering device |
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| CN103481944A (en) * | 2013-09-23 | 2014-01-01 | 湖南南车时代电动汽车股份有限公司 | Power-assisted steering system for new energy bus and control method of power-assisted steering system |
| CN103496396A (en) * | 2013-10-12 | 2014-01-08 | 浙江科技学院 | Novel energy-saving differential power-assisted steering system of electric wheel automobile and control method thereof |
| CN205113432U (en) * | 2015-11-11 | 2016-03-30 | 吉林大学 | Car variable gear ratio a steering system based on hydraulic system |
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2015
- 2015-11-11 CN CN201510765435.XA patent/CN105235741B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008094288A (en) * | 2006-10-13 | 2008-04-24 | Hitachi Ltd | Steering device |
| WO2009000985A1 (en) * | 2007-06-27 | 2008-12-31 | Renault S.A.S. | Power-assisted steering hydraulic actuating circuit and motor vehicle provided therewith |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107310674A (en) * | 2017-06-23 | 2017-11-03 | 山东巴士新能源车业有限公司 | A kind of steering control system applied to electric vehicle |
| CN108896425A (en) * | 2018-05-14 | 2018-11-27 | 吉林大学 | A kind of high-speed overload friction-wear detecting apparatus and its test method |
| CN108896425B (en) * | 2018-05-14 | 2024-04-02 | 吉林大学 | High-speed heavy-load friction and wear testing device and testing method thereof |
| 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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| CN105235741B (en) | 2018-05-04 |
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Granted publication date: 20180504 Termination date: 20181111 |