CN203854716U - Automotive electric hydraulic power-assisted steering mechanism - Google Patents
Automotive electric hydraulic power-assisted steering mechanism Download PDFInfo
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- CN203854716U CN203854716U CN201420257754.0U CN201420257754U CN203854716U CN 203854716 U CN203854716 U CN 203854716U CN 201420257754 U CN201420257754 U CN 201420257754U CN 203854716 U CN203854716 U CN 203854716U
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- intermediate rod
- chamber
- steering
- ecu
- piston
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Abstract
The utility model discloses an automotive electric hydraulic power-assisted steering mechanism controllable in steering radius of a left-side front wheel and a right-side front wheel. The automotive electric hydraulic power-assisted steering mechanism comprises the left-side front wheel, the right-side front wheel, a steering wheel and an electronic control unit (ECU), the left-side front wheel is connected with the left end of a left cross pull rod, the right-side front wheel is connected with the right end of a right cross pull rod, and the left cross pull rod and the right cross pull rod are connected through an oil cylinder. The automotive electric hydraulic power-assisted steering mechanism has the advantages that the steering radiuses of the left-side front wheel and the right-side front wheel can be controlled according to steering degree of an automobile, traveling resistance and tire wear during steering of the wheels are reduced, operating stability of the automobile is improved, and the automotive electric hydraulic power-assisted steering mechanism is an ideal steering system and has wide application prospect.
Description
Technical field
The utility model belongs to a kind of steering mechanism of motor vehicle, relates in particular to a kind of motorcar electric hydraulic power-assisted steering mechanism.
Background technology
During Vehicle Driving Cycle, chaufeur steering wheel rotation, bearing circle is realized wheel steering by a set of steering hardware, completes vehicle by the direction running of chaufeur driving intention.Desirable wheel steering should be Vehicular turn while travelling wheel be pure rolling, the Turning radius difference of left and right front-wheel also meets desirable Turning radius value, the axes intersect of all wheels, in same point, just can prevent the quick-wearing of crossing that Vehicular turn time channel is faced the additional resistance of running car and caused tire.But the steering hardware of existing vehicle transmits by intermediate rod, intermediate rod is a rigid material, need by changing the geometric parameter of steering trapezium in car steering linkage mechanism, make steering trapezium within the scope of certain wheel angle of inclination, the relation of both sides wheel angle of inclination is just substantially close to ideal relationship.Due to the non-telescoping property of intermediate rod, existing this steering hardware still cannot change axes intersect that himself defect realizes all wheels in same point, cannot meet desirable turn radius.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of left and right sides front-wheel steering radius controlled motorcar electric hydraulic power-assisted steering mechanism.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: motorcar electric hydraulic power-assisted steering mechanism, comprise: left front wheel, right side front vehicle wheel, bearing circle and ECU (Electrical Control Unit) ECU, described left front wheel is connected with the left end of left intermediate rod, described right side front vehicle wheel is connected with the right-hand member of right intermediate rod, between described left intermediate rod and right intermediate rod, by oil cylinder, connect, in described oil cylinder, be respectively arranged with left piston and right piston, described left piston and right piston are separated into A chamber by oil cylinder, B chamber and C chamber, in B chamber between described left piston and right piston, be provided with spring, the two ends of described spring are connected with right piston with left piston respectively, described A chamber and the oil pressure in C chamber are controlled by A chamber switch valve and C chamber switch valve respectively, on described left intermediate rod, be provided with tooth bar, described tooth bar cooperatively interacts with the gear that is arranged on deflecting bar lower end, described bearing circle is by turning to speed reduction gearing to be connected with the upper end of deflecting bar, on the side of described left intermediate rod and right intermediate rod, be respectively arranged with the left intermediate rod displacement pickup and the right intermediate rod displacement pickup that cooperatively interact with it, described left intermediate rod displacement transducer signal, right intermediate rod displacement transducer signal, steering wheel angle signal, steering wheel torque signal, lateral angle acceleration signal, vehicle speed signal, A chamber switch valve and C chamber switch valve are all connected with described ECU (Electrical Control Unit) ECU.
The utility model has the advantages that: above-mentioned motorcar electric hydraulic power-assisted steering mechanism, can be according to turn inside diameter extent control left and right sides front-wheel steering radius, resistance to motion and wear on tyres while reducing wheel steering, improved the road-holding property of automobile, be a kind of desirable steering swivel system, have broad application prospects.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model motorcar electric hydraulic power-assisted steering mechanism.
In figure: 1, left front wheel, 2, right side front vehicle wheel, 3, bearing circle, 4, ECU (Electrical Control Unit) ECU, 5, left intermediate rod, 6, right intermediate rod, 7, oil cylinder, 8, left piston, 9, right piston, 10, A chamber, 11, B chamber, 12, C chamber, 13, spring, 14, A chamber switch valve, 15, C chamber switch valve, 16, tooth bar, 17, deflecting bar, 18, gear, 19, turn to speed reduction gearing, 20, left intermediate rod displacement pickup, 21, right intermediate rod displacement pickup.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, describe in detail particular content of the present utility model.
As shown in Figure 1, motorcar electric hydraulic power-assisted steering mechanism, comprise: left front wheel 1, right side front vehicle wheel 2, bearing circle 3 and ECU (Electrical Control Unit) ECU4, described left front wheel 1 is connected with the left end of left intermediate rod 5, described right side front vehicle wheel 2 is connected with the right-hand member of right intermediate rod 6, between described left intermediate rod 5 and right intermediate rod 6, by oil cylinder 7, connect, in described oil cylinder 7, be respectively arranged with left piston 8 and right piston 9, described left piston 8 and right piston 9 are separated into A chamber 10 by oil cylinder 7, B chamber 11 and C chamber 12, in B chamber 11 between described left piston 8 and right piston 9, be provided with spring 13, the two ends of described spring 13 are connected with right piston 9 with left piston 8 respectively, described A chamber 10 and the oil pressure in C chamber 12 are controlled by A chamber switch valve 14 and C chamber switch valve 15 respectively, on described left intermediate rod 5, be provided with tooth bar 16, described tooth bar 16 cooperatively interacts with the gear 18 that is arranged on deflecting bar 17 lower ends, described bearing circle 3 is by turning to speed reduction gearing 19 to be connected with the upper end of deflecting bar 17, on the side of described left intermediate rod 5 and right intermediate rod 6, be respectively arranged with left intermediate rod displacement pickup 20 and the right intermediate rod displacement pickup 21 cooperatively interacting with it, described left intermediate rod displacement transducer signal, right intermediate rod displacement transducer signal, steering wheel angle signal, steering wheel torque signal, lateral angle acceleration signal, vehicle speed signal, A chamber switch valve 14 and C chamber switch valve 15 are all connected with described ECU (Electrical Control Unit) ECU4.
Above-mentioned motorcar electric hydraulic power-assisted steering mechanism, oil cylinder 7 connects left intermediate rod 5 and right intermediate rod 6, between left piston 8 in oil cylinder 7 and right piston 9, by spring 13, connect, left front wheel 1, right side front vehicle wheel 2 when straight-line travelling state spring in free state.On left intermediate rod 5 and right intermediate rod 6, be mounted with respectively left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21, detect the displacement of left intermediate rod 5 and right intermediate rod 6.ECU (Electrical Control Unit) CEU4 detects the go forward side by side dutycycle of row operation processing controls A chamber switch valve 14 and C chamber switch valve 15 of each sensor signal, realize oil pressure difference in interior each chamber of oil cylinder 7, promote the displacement of left intermediate rod 5 and right intermediate rod 6, complete the different rotational angle of left and right turn wheel, realizing left and right sides wheel flutter can turn to according to theoretical Turning radius, by the thrust of oil cylinder 7, for turning to, provide power-assisted simultaneously.
One, bearing circle 3 turns left
Bearing circle 3 is by turning to speed reduction gearing 19 to drive deflecting bar 17 to rotate, and the pinion and rack of deflecting bar 17 lower ends drives left intermediate rod 5 to move right.ECU (Electrical Control Unit) ECU4 detects dtc signal and the angular signal of bearing circle 3 simultaneously.
When the steering torque of bearing circle 3 is non-vanishing, ECU (Electrical Control Unit) ECU4 is according to the dtc signal of the angular signal of bearing circle 3, bearing circle 3, vehicle speed signal and lateral angle acceleration signal, by ECU (Electrical Control Unit) ECU4's
Internal arithmetic, ECU (Electrical Control Unit) ECU4 output duty cycle is given A chamber 10 fuel feeding of oil cylinder 7 to A chamber switch valve 14, for turning to, provide power-assisted.When the power steering providing when oil cylinder 7 is less than predetermined value, increase the dutycycle that ECU (Electrical Control Unit) ECU4 exports to A chamber switch valve 14, increase the oil pressure in the A chamber 10 of oil cylinder 7; When the power steering providing when oil cylinder 7 is greater than predetermined value, reduce the dutycycle that ECU (Electrical Control Unit) ECU4 exports to A chamber switch valve 14, reduce the oil pressure in the A chamber 10 of oil cylinder 7.
Left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21 detect respectively the displacement of left intermediate rod 5, right intermediate rod 6, the numerical value of left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21 passes to ECU (Electrical Control Unit) ECU4, and by computing, draws the steering angle of left front wheel 1, right side front vehicle wheel 2.When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are greater than that left front takes turns that 1 steering angle calculates predetermined right side, it is too fast to be that right side front vehicle wheel 2 turns to, increase the dutycycle of ECU (Electrical Control Unit) ECU4 output to C chamber switch valve 15, the oil pressure that increases the C chamber 12 of oil cylinder 7, reduces right side front vehicle wheel 2 steering angles; When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are less than that left front takes turns that 1 steering angle calculates predetermined right side, it is slow to be that right side front vehicle wheel 2 turned to, reduce the dutycycle of ECU (Electrical Control Unit) ECU4 output to C chamber switch valve 15, reduce the oil pressure in the C chamber 12 of oil cylinder 7, increase the steering angle of right side front vehicle wheel 2.
When bearing circle 3 steering torques are zero, and when steering angle is non-vanishing, now vehicle is back positive status, ECU (Electrical Control Unit) ECU4 closes the dutycycle of A chamber switch valve 14, C chamber switch valve 15, making the oil pressure in the interior A of oil cylinder 7 chamber 10, C chamber 12 is normal pressure, utilizes the spring 13 spring return left front wheels 1 in the interior B of oil cylinder 7 chamber 11, time positive-angle of right side front vehicle wheel 2.Left intermediate rod displacement pickup 20, right intermediate rod position
Displacement sensor 21 detects respectively the displacement of left intermediate rod 5, right intermediate rod 6, the numerical value of left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21 passes to ECU (Electrical Control Unit) ECU4, and by computing, draws the steering angle of left front wheel 1, right side front vehicle wheel 2.When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are greater than that left front takes turns that 1 steering angle calculates predetermined right side, be that left front wheel 1 time is just too fast, increase the dutycycle that ECU (Electrical Control Unit) ECU4 exports to A chamber switch valve 14, the oil pressure that increases the interior A of oil cylinder 7 chamber 10, reduces left front and takes turns 1 steering angle; When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are less than that left front takes turns that 1 steering angle calculates predetermined right side, it is slow to be that right side front vehicle wheel 2 turned to, increase the dutycycle that ECU (Electrical Control Unit) ECU4 exports to C chamber switch valve 15, increase the oil pressure in the interior C of oil cylinder 7 chamber 12, reduce the steering angle of right side front vehicle wheel 2.
Two, bearing circle 3 turning clockwises
Bearing circle 3 is by turning to speed reduction gearing 19 to drive deflecting bar 17 to rotate, and the pinion and rack of deflecting bar 17 lower ends drives left intermediate rod 5 to be moved to the left.ECU (Electrical Control Unit) ECU4 detects dtc signal and the angular signal of bearing circle 3 simultaneously.
When bearing circle 3 steering torques are when non-vanishing, ECU (Electrical Control Unit) ECU4 is according to bearing circle 3 angular signals, bearing circle 3 dtc signals, vehicle speed signal and lateral angle acceleration signal, by the internal arithmetic of ECU (Electrical Control Unit) ECU4, ECU (Electrical Control Unit) ECU4 output duty cycle is given C chamber 12 fuel feeding of oil cylinder 7 to C chamber switch valve 15, for turning to, provide power-assisted.When the power steering providing when oil cylinder 7 is less than predetermined value, increase the dutycycle that ECU (Electrical Control Unit) ECU4 exports to C chamber switch valve 15, increase the oil pressure in the C chamber 12 of oil cylinder 7; When oil cylinder 7 provides
Power steering while being greater than predetermined value, reduce the dutycycle that ECU (Electrical Control Unit) ECU4 exports to C chamber switch valve 15, reduce the oil pressure in the C chamber 12 of oil cylinder 7.
Left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21 detect respectively the displacement of left intermediate rod 5, right intermediate rod 6, the numerical value of left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21 passes to ECU (Electrical Control Unit) ECU4, and by computing, draws the steering angle of left front wheel 1, right side front vehicle wheel 2.When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are greater than that left front takes turns that 1 steering angle calculates predetermined right side, it is too fast to be that right side front vehicle wheel 2 turns to, increase the dutycycle of ECU (Electrical Control Unit) ECU4 output to A chamber switch valve 14, the oil pressure that increases the interior A of oil cylinder 7 chamber 10, reduces right side front vehicle wheel 2 steering angles; When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are less than that left front takes turns that 1 steering angle calculates predetermined right side, it is slow to be that right side front vehicle wheel 2 turned to, reduce the dutycycle of ECU (Electrical Control Unit) ECU4 output to A chamber switch valve 14, reduce the oil pressure in the interior A of oil cylinder 7 chamber 10, increase the steering angle of right side front vehicle wheel 2.
When bearing circle 3 steering torques are zero, and when steering angle is non-vanishing, now vehicle is back positive status, ECU (Electrical Control Unit) ECU4 closes the dutycycle of A chamber switch valve 14, C chamber switch valve 15, making the oil pressure in the interior A of oil cylinder 7 chamber 10, C chamber 12 is normal pressure, utilizes the spring 13 spring return left front wheels 1 in the interior B of oil cylinder 7 chamber 11, time positive-angle of right side front vehicle wheel 2.Intermediate rod displacement pickup 5,8 detects respectively the displacement of arranged on left and right sides intermediate rod 6, the numerical value of left intermediate rod displacement pickup 20, right intermediate rod displacement pickup 21 passes to ECU (Electrical Control Unit) ECU4, and by computing, draws the steering angle of left front wheel 1, right side front vehicle wheel 2.When being greater than left front, front vehicle wheel 2 steering angles in right side take turns predetermined that 1 steering angle calculates
During right side front vehicle wheel 2 steering angle, left front wheel 1 time is just too fast, increases the dutycycle that ECU (Electrical Control Unit) ECU4 exports to C chamber switch valve 15, increases the oil pressure in the interior C of oil cylinder 7 chamber 12, increases right side front vehicle wheel 2 steering angles; When front vehicle wheel 2 steering angle of front vehicle wheel 2 steering angles in right side are less than that left front takes turns that 1 steering angle calculates predetermined right side, it is slow to be that right side front vehicle wheel 2 turned to, increase the dutycycle that ECU (Electrical Control Unit) ECU4 exports to A chamber switch valve 14, increase the oil pressure in the interior A of oil cylinder 7 chamber 10, increase the steering angle of left front wheel 1.
Claims (1)
1. motorcar electric hydraulic power-assisted steering mechanism, it is characterized in that: comprising: left front wheel (1), right side front vehicle wheel (2), bearing circle (3) and ECU (Electrical Control Unit) ECU(4), described left front wheel (1) is connected with the left end of left intermediate rod (5), described right side front vehicle wheel (2) is connected with the right-hand member of right intermediate rod (6), between described left intermediate rod (5) and right intermediate rod (6), by oil cylinder (7), connect, in described oil cylinder (7), be respectively arranged with left piston (8) and right piston (9), described left piston (8) and right piston (9) are separated into A chamber (10) by oil cylinder (7), B chamber (11) and C chamber (12), in B chamber (11) between described left piston (8) and right piston (9), be provided with spring (13), the two ends of described spring (13) are connected with right piston (9) with left piston (8) respectively, described A chamber (10) and the oil pressure of C chamber (12) are controlled by A chamber switch valve (14) and C chamber switch valve (15) respectively, on described left intermediate rod (5), be provided with tooth bar (16), described tooth bar (16) cooperatively interacts with the gear (18) that is arranged on deflecting bar (17) lower end, described bearing circle (3) is by turning to speed reduction gearing (18) to be connected with the upper end of deflecting bar (17), on the side of described left intermediate rod (5) and right intermediate rod (6), be respectively arranged with left intermediate rod displacement pickup (20) and the right intermediate rod displacement pickup (21) cooperatively interacting with it, described left intermediate rod displacement transducer signal, right intermediate rod displacement transducer signal, steering wheel angle signal, steering wheel torque signal, lateral angle acceleration signal, vehicle speed signal, A chamber switch valve (14) and C chamber switch valve (15) all with described ECU (Electrical Control Unit) ECU(4) be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257754.0U CN203854716U (en) | 2014-05-20 | 2014-05-20 | Automotive electric hydraulic power-assisted steering mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420257754.0U CN203854716U (en) | 2014-05-20 | 2014-05-20 | Automotive electric hydraulic power-assisted steering mechanism |
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| Publication Number | Publication Date |
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| CN203854716U true CN203854716U (en) | 2014-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420257754.0U Expired - Fee Related CN203854716U (en) | 2014-05-20 | 2014-05-20 | Automotive electric hydraulic power-assisted steering mechanism |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103963834A (en) * | 2014-05-20 | 2014-08-06 | 盐城振宇科技发展有限公司 | Electro-hydraulic power steering mechanism for cars |
| CN105840902A (en) * | 2015-07-30 | 2016-08-10 | 荣成华泰汽车有限公司 | Flow control valve, steering device and car |
| CN106741168A (en) * | 2016-11-25 | 2017-05-31 | 合肥工业大学 | Automotive steering structure with deflecting roller anti-attrition adjustment mechanism |
| CN108644176A (en) * | 2018-04-02 | 2018-10-12 | 李 | A kind of heavy－duty autonomous operation vehicle high-precision steering driving hydraulic cylinder |
-
2014
- 2014-05-20 CN CN201420257754.0U patent/CN203854716U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103963834A (en) * | 2014-05-20 | 2014-08-06 | 盐城振宇科技发展有限公司 | Electro-hydraulic power steering mechanism for cars |
| CN105840902A (en) * | 2015-07-30 | 2016-08-10 | 荣成华泰汽车有限公司 | Flow control valve, steering device and car |
| CN106741168A (en) * | 2016-11-25 | 2017-05-31 | 合肥工业大学 | Automotive steering structure with deflecting roller anti-attrition adjustment mechanism |
| CN106741168B (en) * | 2016-11-25 | 2018-09-07 | 合肥工业大学 | Automotive steering structure with deflecting roller anti-attrition adjustment mechanism |
| CN108644176A (en) * | 2018-04-02 | 2018-10-12 | 李 | A kind of heavy－duty autonomous operation vehicle high-precision steering driving hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20170520 |