CN202098457U - Electrical control hydraulic four-wheel steering system - Google Patents
Electrical control hydraulic four-wheel steering system Download PDFInfo
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- CN202098457U CN202098457U CN 201120209147 CN201120209147U CN202098457U CN 202098457 U CN202098457 U CN 202098457U CN 201120209147 CN201120209147 CN 201120209147 CN 201120209147 U CN201120209147 U CN 201120209147U CN 202098457 U CN202098457 U CN 202098457U
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- ecu
- electromagnetic valve
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Abstract
The utility model relates to an electrical control hydraulic four-wheel steering system for a two-axle or three-axle vehicle, which comprises a front wheel steering mechanism, a rear wheel steering mechanism, a steering wheel rotating angle sensor, a rear wheel rotating angle sensor and an M-shaped three-position four-way electromagnetic valve. The steering wheel rotating angle sensor is mounted on a steering shaft of a steering wheel; the rear wheel rotating angle sensor is mounted on a rear wheel steering knuckle; a vehicle speed sensor is mounted near a rotor of a vehicle speed milometer; a yaw velocity sensor is mounted on a vehicle body at the part of the mass center of the vehicle; a pinion and rack steering mechanism is used as the front wheel steering mechanism; and a double-rod hydraulic cylinder in which a return spring is arranged is used as the rear wheel steering mechanism. When the vehicle turns, sensed signals are transmitted to a controller (ECU Electrical Conversion Unit) by all the sensors; after the sensed signals are analyzed and calculated, a signal is output to the electromagnetic valve by the controller (ECU); the movement direction and the position of the electromagnetic valve are determined by the electromagnetic valve according to the signal received by the controller (ECU); a corresponding hydraulic circuit is conducted; and the double-rod hydraulic cylinder is driven to move, so that rear wheels deflect by a certain angles.
Description
Technical field
The utility model belongs to the Manufacturing Technology for Automotive Parts field, is specifically related to the electric-controlled hydraulic formula four-wheel steering system of a kind of diaxon or six-wheeler.
Background technology
Traditional two-wheel front-axle steering system since speed of response slow, turn to dumb, directional balance difference and can't satisfy people gradually when running at high speed to the increasingly high requirement of vehicle active safety, press for a kind of steering swivel system efficiently and realize good Vehicular turn safety.Under these circumstances, four-wheel steering (Four-Wheel Steering is called for short 4WS) system arises at the historic moment, and four-wheel steering automobile is equipped with a cover steering hardware on rear suspension, be referred to as rear-axle steering mechanism.When chaufeur rotated steering handwheel, foresteerage gear and rear-axle steering mechanism moved simultaneously.Adopt the 4WS mode, trailing wheel is called same-phase when identical with front-wheel steering and turns to, and trailing wheel and front-wheel steering are called phase reversal when opposite and turn to.The major advantage of four-wheel steering automobile is when high speed, to adopt same-phase to turn to can improve vehicle handling stability, adopts phase reversal to turn to the turn radius that can reduce automobile during low speed, makes running car more flexible.
At present in the 4WS of usefulness system; Majority is a mechanical type 4WS system; This system is because front and rear wheel steering system machinery links, and operational forces is big, reliable transmission, but because the shortcoming that aspect structure design and car load layout, exists; And in the automobile sport process, have vibration and cause defective such as noise, make mechanical type 4WS system be difficult to adapt to the requirement of modern automobile lightweight and travelling comfort aspect.
The utility model content
Traditional mechanical formula four-wheel steering system is arranged in structure, car load in order to overcome, the defective of aspect such as aspect the vehicle ride comfort, and the utility model provides a kind of arrangement convenience, electric-controlled hydraulic formula four-wheel steering system little, that mainly be made up of Hydraulic Elements takes up room.
The technical solution that realizes above-mentioned purpose is following: electric-controlled hydraulic formula four-wheel steering system; Comprise foresteerage gear, rear-axle steering mechanism, steering wheel angle sensor, trailing wheel rotary angle transmitter, electromagnetic valve, car speed sensor and yaw-rate sensor; Said steering wheel angle sensor; Be installed on the steering shaft of steering handwheel, adopt the inductance type angular-motion transducer.
Said trailing wheel rotary angle transmitter is installed on the rear-axle steering joint, adopts the inductance type angular-motion transducer.
Said foresteerage gear adopts rack and pinion steering mechanism.
Said electromagnetic valve adopts M type three position four-way electromagnetic control valve.
Said rear-axle steering mechanism is a dual-rod hydraulic cylinder, and two chambeies of hydraulic actuating cylinder respectively establish a pull back spring, and the hydraulic oil in the hydraulic actuating cylinder is from hydraulic oil pump, and Hydraulic Pump is by engine drive.
Said car speed sensor is installed near the rotor of car speed mileage table, adopts the photo-electric car speed sensor.
Said yaw-rate sensor is installed on the vehicle body at automobile barycenter place, adopts piezoelectricity efflux angle speed sensor.
The perceptual signal of described steering wheel angle sensor, trailing wheel rotary angle transmitter, car speed sensor and yaw-rate sensor is all passed to controller (ECU) through lead; The CPU of described controller (ECU) is 16 micro controller systems with 256 byte RAM; Adopt the 80C196KB micro controller system of the MCS-96 of Intel Company series, extend out the 27128EPROM program store.
Said electromagnetic valve receives the output signal of controller (ECU), and according to the indication of control signal, does the motion of corresponding orientation, with the different hydraulic circuit of conducting, makes trailing wheel deflection to the left or to the right.
Compare with traditional mechanical formula four-wheel steering system, the useful technique effect of the utility model embodies in the following areas:
(1) helps the calculation for layout of car load.Because the utility model has used the hydraulic pressure components and parts, has reduced mechanical connection morely, parts are few, in light weight, and are compact to design, and shared space is less relatively, can more help the calculation for layout of car load.
(2) do not influence the travelling comfort of car load.Since the utility model do not adopt mechanical drive, therefore the vibration, the noise problem that do not have the vibration of transmission shaft and cause car load can not influence the travelling comfort of car load.
Description of drawings
Fig. 1 is the utility model general arrangement.
Fig. 2 is the utility model control system schematic circuit diagram.
Mark among the above-mentioned figure is: 1,3 front-wheels, 2 foresteerage gears, 4 steering wheel angle sensors, 5 steering handwheels, 6 car speed sensor 7 Vehicular yaw angular velocity sensoies, 8 controllers (ECU), 9 hydraulic oil pumps, 10 reducing valves, 11 fuel tanks, 12 electromagnetic valves, 13 trailing wheel rotary angle transmitters, 14,17 trailing wheels, 15 rear-axle steering mechanisms, 16 pull back springs, 18 external power supplys
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done to describe further.
As shown in Figure 1, electric-controlled hydraulic formula four-wheel steering system comprises foresteerage gear 2, steering wheel angle sensor 4, trailing wheel rotary angle transmitter 13, electromagnetic valve 12, rear-axle steering mechanism (15); Said foresteerage gear 2 adopts rack and pinion steering mechanism; Said steering wheel angle sensor 4 is installed on the steering shaft of steering handwheel 5, adopts the inductance type angular-motion transducer; Said trailing wheel rotary angle transmitter 12 is installed on the rear-axle steering joint, adopts the inductance type angular-motion transducer, and car speed sensor 6 is installed near the rotor of car speed mileage table, adopts the photo-electric car speed sensor; Said yaw-rate sensor 7 is installed on the vehicle body at automobile barycenter place, adopts piezoelectricity efflux angle speed sensor.
Said rear-axle steering mechanism 15 is a dual-rod hydraulic cylinder, and two chambeies of hydraulic actuating cylinder respectively establish a pull back spring 16, and the hydraulic oil in the hydraulic actuating cylinder is from hydraulic oil pump 9, and Hydraulic Pump 9 connects fuel tank and rear-axle steering mechanisms 15, by engine drive.On the hydraulic tubing between Hydraulic Pump 9 and the rear-axle steering mechanism 15 and connect a reducing valve 10, with restriction pipeline top pressure.
The perceptual signal of described steering wheel angle sensor 4, trailing wheel rotary angle transmitter 13, car speed sensor 6 and yaw-rate sensor 7 is all passed to controller (ECU) 8 through lead; Described controller (ECU) 8 is 16 micro controller systems with 256 byte RAM; Adopt the 80C196KB micro controller system of the MCS-96 of Intel Company series, extend out the 27128EPROM program store.
Said electromagnetic valve 12 adopts M type three position four-way electromagnetic valves, and it receives the output signal of controller (ECU) 8, and according to the indication of control signal, does the motion of corresponding orientation, with the different hydraulic circuit of conducting.
See shown in Figure 2, said controller (ECU) the 8th, the core of total system partly is made up of 80C196KB micro controller system 8-3, EPROM8-2, signal conditioning circuit 8-1, interior power supply circuit 8-4, motor drive circuit 8-5, display output circuit 8-6 etc.Described controller (ECU) 8 also is built-in with the self-diagnostic function of the system failure, and can be with diagnostic result through failure screen 20 drivers.System is provided with two kinds and turns to pattern; And turn to Pattern Select Switch 17 and turn to mode switch indicator lamp 19; Chaufeur can select traditional 2WS to turn to pattern, also can select 4WS to turn to pattern, and the micro controller system plug-in can be according to breakdown signal automatically to turning to mode switch to select; When four-wheel steering system breaks down, be the 2WS pattern with steering swivel system by the 4WS mode converting automatically promptly.
When Vehicular turn; Steering wheel angle sensor 4 with the turn sign of steering handwheel 5 import controller (ECU) 8 into, car speed sensor 6 imports the speed signal of vehicle into (ECU) 8, (ECU) 8 analyze after the computing, to electromagnetic valve 12 output signals; The signal value that electromagnetic valve 12 transmits according to (ECU) is confirmed the movement position of electromagnetic valve; Through the corresponding pipeline of conducting, drive dual-rod hydraulic cylinder motion, and then make trailing wheel produce the deflection of certain angle as rear-axle steering mechanism 15.(ECU) 8 also monitor in real time simultaneously through the state of yaw- rate sensor 7,13 pairs of vehicles of trailing wheel rotary angle transmitter; With the ideal value of trailing wheel corner and the difference between the actual rotational angle; Feed back to electromagnetic valve 12, with real-time adjustment trailing wheel corner, thus the four-wheel steering of realization automobile.Total system is by external power supply 18 power supplies, and said external power supply 18 is a Vehicular accumulator cell.
The speed of a motor vehicle changes very fast (turning all is attended by moderating process usually) during owing to automobile turning in actual travel; So the control policy that adopts is: front and back wheel backward rotation when the speed of a motor vehicle is lower than 40km/h; Rear-axle steering mechanism is almost motionless during 40km/h～60km/h; And front and back wheel is rotated in the same way when being higher than 60km/h, and the size and Orientation of action is then according to the ideal value of setting that turns to, fully by (ECU) 8 controls.
Combine accompanying drawing that the utility model has been carried out exemplary description above; Obviously the concrete realization of the utility model does not receive the restriction of aforesaid way; As long as adopted the method design of the utility model and the improvement of the various unsubstantialities that technical scheme is carried out; Or the design of the utility model and technical scheme are directly applied to other occasion without improving, all within the protection domain of the utility model.
Claims (3)
1. electric-controlled hydraulic formula four-wheel steering system comprises foresteerage gear (2), steering wheel angle sensor (4), trailing wheel rotary angle transmitter (13), electromagnetic valve (12) and rear-axle steering mechanism (15), and said steering wheel angle sensor (4) is installed on the steering shaft of steering handwheel (5); Adopt the inductance type angular-motion transducer; Said trailing wheel rotary angle transmitter (13) is installed on the rear-axle steering joint, adopts the inductance type angular-motion transducer, and said foresteerage gear (2) adopts rack and pinion steering mechanism; Said electromagnetic valve (12) is a M type three position four-way electromagnetic control valve; Said rear-axle steering mechanism (15) is a dual-rod hydraulic cylinder, and two chambeies of hydraulic actuating cylinder respectively establish a pull back spring (16), and the hydraulic oil in the hydraulic actuating cylinder is from hydraulic oil pump (9); Hydraulic Pump (9) is characterized in that by engine drive:
Also comprise car speed sensor (6) and yaw-rate sensor (7); Said car speed sensor (6) is installed near the rotor of car speed mileage table; Adopt the photo-electric car speed sensor; Said yaw-rate sensor (7) is installed on the vehicle body at automobile barycenter place, adopts piezoelectricity efflux angle speed sensor.
2. electric-controlled hydraulic formula four-wheel steering system according to claim 1; It is characterized in that: the perceptual signal of described steering wheel angle sensor (4), trailing wheel rotary angle transmitter (13), car speed sensor (6) and yaw-rate sensor (7) is all passed to controller (ECU) (8) through lead; The CPU of described controller (ECU) (8) is 16 micro controller systems with 256 byte RAM; Adopt the 80C196KB micro controller system of the MCS-96 of Intel Company series, extend out the 27128EPROM program store.
3. electric-controlled hydraulic formula four-wheel steering system according to claim 1 and 2; It is characterized in that: said electromagnetic valve (12) receives the output signal of controller (ECU) (8); And, do the motion of corresponding orientation, with the different hydraulic circuit of conducting according to the indication of control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120209147 CN202098457U (en) | 2011-06-11 | 2011-06-11 | Electrical control hydraulic four-wheel steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120209147 CN202098457U (en) | 2011-06-11 | 2011-06-11 | Electrical control hydraulic four-wheel steering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202098457U true CN202098457U (en) | 2012-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120209147 Expired - Fee Related CN202098457U (en) | 2011-06-11 | 2011-06-11 | Electrical control hydraulic four-wheel steering system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202098457U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103625532A (en) * | 2012-08-20 | 2014-03-12 | 绵阳师范学院 | Automobile steering-by-wire system for achieving aligning and road feel based on fluid power |
| CN103895699A (en) * | 2012-12-28 | 2014-07-02 | 比亚迪股份有限公司 | Steering device and remote-control steering system |
| CN104960570A (en) * | 2015-07-13 | 2015-10-07 | 厦门理工学院 | Steering controller based on GMM, and steering system of rear driving wheels of forklift |
| CN107150718A (en) * | 2017-06-06 | 2017-09-12 | 吉林大学 | Multi-mode automobile steer-by-wire system |
-
2011
- 2011-06-11 CN CN 201120209147 patent/CN202098457U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103625532A (en) * | 2012-08-20 | 2014-03-12 | 绵阳师范学院 | Automobile steering-by-wire system for achieving aligning and road feel based on fluid power |
| CN103625532B (en) * | 2012-08-20 | 2016-01-13 | 绵阳师范学院 | A kind of based on fluid power realize back just with the automobile steer-by-wire system of road feel |
| CN103895699A (en) * | 2012-12-28 | 2014-07-02 | 比亚迪股份有限公司 | Steering device and remote-control steering system |
| CN103895699B (en) * | 2012-12-28 | 2016-03-09 | 比亚迪股份有限公司 | A kind of steering hardware and unmanned steering system |
| CN104960570A (en) * | 2015-07-13 | 2015-10-07 | 厦门理工学院 | Steering controller based on GMM, and steering system of rear driving wheels of forklift |
| CN107150718A (en) * | 2017-06-06 | 2017-09-12 | 吉林大学 | Multi-mode automobile steer-by-wire system |
| CN107150718B (en) * | 2017-06-06 | 2018-04-06 | 吉林大学 | Multi-mode automobile steer-by-wire system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20120611 |