CN202449057U - Electronic control hydraulic power-assisted steering system for vehicles - Google Patents
Electronic control hydraulic power-assisted steering system for vehicles Download PDFInfo
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- CN202449057U CN202449057U CN2012200568463U CN201220056846U CN202449057U CN 202449057 U CN202449057 U CN 202449057U CN 2012200568463 U CN2012200568463 U CN 2012200568463U CN 201220056846 U CN201220056846 U CN 201220056846U CN 202449057 U CN202449057 U CN 202449057U
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- throttle valve
- electromagnetic throttle
- automobile
- pressure bypass
- steering system
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Abstract
The utility model relates to an electronic control hydraulic power-assisted steering system for vehicles. The system comprises a steering oil tank, a steering oil pump, an electromagnetic throttle valve, a steering gear, a vehicle body controller, a vehicle speed sensor and a pressure bypass valve, wherein an output port of the steering oil tank is connected with an input port of the steering gear through the steering oil pump, an output port of the steering gear is connected with an input port of the steering oil tank, and the vehicle body controller controls the opening of the electromagnetic throttle valve by means of signals input by the vehicle speed sensor; the pressure bypass valve is provided with two input ports and an output port; the electromagnetic throttle valve is arranged between the steering oil tank and the steering gear, an output port of the steering oil pump is connected with an input port of the electromagnetic throttle valve, and an output port of the electromagnetic throttle valve is connected with the input port of the steering gear; and the output port of the steering oil pump is connected with one input port of the pressure bypass valve, the output port of the electromagnetic throttle valve is connected with the other input port of the pressure bypass valve, and the output port of the pressure bypass valve is connected with an input port of the steering oil pump.
Description
Technical field
The vehicle that the utility model relates in a kind of automobile mechanical hydraulic pressure electron controls technology field is used steering swivel system, relates in particular to a kind of automobile-used electric-controlled hydraulic servo steering system that is integrated in vehicle interior.
Background technology
Growing automotive technology has proposed increasingly high requirement to the steering swivel system of vehicle.For commercial vehicle/comm..vehicle, great majority have adopted the circulating ball type hydraulic power steering gear.In order to guarantee enough steering efforts and short time to turn, power steerig pump need provide sufficient pressure and flow to promote the piston motion in the deflector, accomplishes turning to of vehicle.When guaranteeing ease of steering, also can bring some problems, when running at high speed, this ease of steering can bring to chaufeur and turn to unstable sensation, has increased the sense of discomfort of chaufeur.If but turn to traveling comfort when guaranteeing high speed, and can sacrifice ease of steering again, for traditional power steering mechanism, the choice relation that turns to traveling comfort and portability to become can not to satisfy simultaneously.
Be illustrated in figure 1 as existing a kind of automobile interior and use automatically controlled hydraulic power-assist steering system: the hydraulic oil in the steering oil reservoir 1 inputs to deflector 6 after pressurizeing through power steerig pump 2; The aperture that an electromagnetic throttle valve 10 can be regulated bypass circulation in the process; Regulate the high pressure oil flow that gets into deflector 6; Electromagnetic throttle valve 10 is controlled through car body controller 11, and the signal of car body controller 11 is by car speed sensor 9 and the input of assist characteristic select switch 12 signals.
The automobile interior of said structure is used automatically controlled hydraulic power-assist steering system; The mouth of electromagnetic throttle valve 10 directly links to each other with the input end of steering oil reservoir 1, belongs to the open loop system of carrying out flow regulating through electromagnetic throttle valve 10, when vehicle is in when running at high speed; When especially running into emergency case and needing the racing bearing circle; The instantaneous velocity at electromagnetic throttle valve 10 two ends increases, and the difference of pressure at two ends increases, and this has just caused flow and the pressure in the control process to be difficult to slowly change; Bring the pause and transition in rhythm or melody sense to chaufeur, driving experience is bad.
In addition; When electric control function is opened high-revolving the time; If thereby the heavy accident risk that makes of burst unsafe condition steering swivel system strengthens, the releasing of electric-controlled hydraulic flow can not guarantee that electromagnetic throttle valve 10 standard-sized sheets provide supply with full flow to deflector when system should not consider the burst unsafe condition; Make to turn to lightly inadequately, also cannot say for sure the card safety of driving.
The utility model content
To deficiency of the prior art; The utility model aims to provide a kind of automobile-used electric-controlled hydraulic servo steering system of closed loop of carrying out flow regulating through electromagnetic throttle valve; This system can so that automobile no matter at low speed when running at high speed, the flow at electromagnetic throttle valve two ends and pressure can change slowly, and enough driving portabilities can be provided; Also can eliminate the moment pause and transition in rhythm or melody sense of motor turning dish simultaneously, improve driving experience.
On the basis of the problems referred to above, the utility model also can solve the automobile of running at high speed when being in an emergency, and under the situation of chaufeur racing bearing circle, can improve and turns to hand-held design, guarantees the safety of driving.
In order to address the above problem, the utility model provides a kind of automobile-used electric-controlled hydraulic servo steering system, comprising: steering oil reservoir, power steerig pump, electromagnetic throttle valve, deflector, car body controller and car speed sensor; The delivery port of steering oil reservoir is connected with the input port of deflector via power steerig pump; The delivery port of deflector is connected with the input port of steering oil reservoir; Car body controller is through the aperture of the signal input control electromagnetic throttle valve of car speed sensor; Said automobile-used electric-controlled hydraulic servo steering system is characterised in that: also comprise a pressure bypass disc, this pressure bypass disc has two input ports and a delivery port; Said electromagnetic throttle valve is set between said power steerig pump and the deflector, and the delivery port of power steerig pump is connected with the input port of electromagnetic throttle valve, and the delivery port of electromagnetic throttle valve is connected with the input port of deflector; The delivery port of power steerig pump is connected with an input port of pressure bypass disc, and the delivery port of electromagnetic throttle valve is connected with another input port of pressure bypass disc, and the delivery port of pressure bypass disc is connected with the input port of power steerig pump.
Preferably, between said electromagnetic throttle valve and the said pressure bypass disc flow regulating valve is set.Said flow regulating valve is a flow regulating valve open in usual.
Preferably, said car body controller is through the aperture of output PWM ripple control electromagnetic throttle valve.
Preferably, the signal input part of said car body controller connects a steering wheel angle sensor, and when vehicle was in high speed driving, car body controller was controlled the folding of electromagnetic throttle valve through the bearing circle relative speed variation of steering wheel angle sensor input.
Preferably, when said bearing circle relative speed variation is 180 °/second to 720 °/second, said car body controller control electromagnetic throttle valve complete opening.
Preferably, said electromagnetic throttle valve and pressure bypass disc and steering oil reservoir close on setting.
The algorithm that this automobile-used electric-controlled hydraulic servo steering system is used has guaranteed vehicle when high speed, and according to the change of the speed of a motor vehicle, the aperture of electromagnetic throttle valve changes; Make the instantaneous velocity of electromagnetic throttle valve increase; Difference of pressure increases, and promotes the pressure bypass disc and opens, and a part of high-pressure and hydraulic oil flows away through bypass circulation; Reduce flow velocity and flow, thereby form stable closed loop control through electromagnetic throttle valve.Enough driving portabilities can be provided, also can eliminate moment pause and transition in rhythm or melody sense simultaneously, improve driving experience.
When high speed, when chaufeur twirl steering handwheel, the steering wheel angle sensor measures angular signal; Obtain the corner variable gradient through handling, when this value surpasses certain value, think to run into emergency situation, do not export the PWM ripple this moment; The electromagnetic throttle valve standard-sized sheet guarantees that all hydraulic oil all flow to deflector, thereby reduces steering effort; Ease of steering when guaranteeing emergency situation improves drive safety.
Description of drawings
Fig. 1 is an automobile-used electric-controlled hydraulic servo steering system scheme drawing of the prior art;
Fig. 2 is the automobile-used electric-controlled hydraulic servo steering system scheme drawing of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done explanation further.
As shown in Figure 2, a kind of automobile-used electric-controlled hydraulic servo steering system of the utility model, the communication interface that this system adopts is a CAN procotol interface.This system comprises steering oil reservoir 1, power steerig pump 2, electromagnetic throttle valve 3, pressure bypass disc 4, flow regulating valve 5, deflector 6, car body controller (BCM) 7, steering wheel angle sensor 8, car speed sensor 9.Steering oil reservoir 1 links to each other with the input port of power steerig pump 2, and to power steerig pump 2 fuel feeding, another interface links to each other with deflector 6, and the oil return of deflector 6 gets into steering oil reservoir 1.Car body controller 7 is through the aperture size of the signal input control electromagnetic throttle valve 3 of car speed sensor 9; Said electromagnetic throttle valve 3 is set between said power steerig pump 2 and the deflector 6; The delivery port of power steerig pump 2 is connected with the input port of electromagnetic throttle valve 3, and the delivery port of electromagnetic throttle valve 3 is connected with the input port of deflector 6; The delivery port of the delivery port of power steerig pump 2 and electromagnetic throttle valve 3 is connected with two input ports of pressure bypass disc 4 respectively, and the delivery port of pressure bypass disc 4 is connected with the input port of power steerig pump 2.Electromagnetic throttle valve 3 control flows are to the flow of deflector 6 and pressure bypass disc 4, and the outlet of pressure bypass disc 4 links to each other with the oil inlet pipeline of power steerig pump 2, with steering oil reservoir 1 to power steerig pump 2 fuel feeding.The hydraulic tubing delivery port of electromagnetic throttle valve 3 links to each other with the hydraulic tubing of flow regulating valve 5 with deflector 6, to pressure control bypass disc 4 comparative pressure is provided through flow regulating valve 5 on the one hand, to deflector 6 the high pressure oil flow is provided through pipeline on the one hand.The PWM of the circuit of electromagnetic throttle valve 3 and car body controller 7 (Pulse WidthModulation; Pulse duration modulation) output port of ripple links to each other; Aperture size by car body controller 7 control electromagnetic throttle valves 3; The input port of car body controller 7 (I/O port) links to each other with car speed sensor 9 with steering wheel angle sensor 8 respectively, and the incoming signal of steering wheel angle sensor 8 and car speed sensor 9 is handled, and exports specific PWM ripple.
Preferably, said flow regulating valve 5 is a flow regulating valve open in usual.Through a flow regulating valve is set between electromagnetic throttle valve 3 and pressure bypass disc 5, can be so that the hydraulic oil flow velocity that is flow in the pressure bypass disc 4 by electromagnetic throttle valve 3 be more stable, and flow velocity is controlled.Make pressure bypass disc 4 obtain the comparative pressure of both sides more easily.
In this automobile-used electric-controlled hydraulic servo steering system, electromagnetic throttle valve 3 is controlled through the PWM ripple, controls the power of importing electromagnetic throttle valve according to the dutycycle difference of PWM ripple, realizes that the aperture of electromagnetic throttle valve is different.
In this automobile-used electric-controlled hydraulic servo steering system; Pressure bypass disc 4 has two input ports and a delivery port, and the flexible original paper of its set inside (like spring) is a kind of difference of pressure through the valve both sides; Overcome the elastic force of elastic element (like spring), thereby reach the device of certain valve opening.
In the automatically controlled hydraulic power-assist steering system of this integrated form, the electronic control module of hydraulic booster that car body controller 7 is integrated through the algorithm computing, is exported specific PWM ripple.Car body controller is connected with electromagnetic throttle valve, through the PWM ripple of output electromagnetic throttle valve is controlled.Electromagnetic throttle valve and pressure bypass disc arranged adjacent guarantee that at the oil pump periphery on-way resistance of by passage is less, make this system can play energy-conservation effect when moving.
When system works:
1, during low vehicle speeds, car speed sensor 9 passes to car body controller 7 with GES, and car body controller 7 is judged the vehicle running state of this moment through calculating; Control electromagnetic throttle valve 3 with the pipeline standard-sized sheet through the PWM ripple; This moment, electromagnetic throttle valve 3 inputs equated that with the pressure at delivery conduit two ends pressure bypass disc 4 two ends do not have pressure reduction, and the in-to-in elastic element is closed bypass disc; All hydraulic oil flows to deflector 6; Thereby guarantee sufficient hydraulic fluid flow rate, make under this situation, to have enough hydraulic fluid flow rates and pressure, guarantee ease of steering.
2, vehicle is stablized when going at a high speed; Car speed sensor 9 passes to car body controller 7 with GES; Car body controller 7 is judged at this moment through calculating, and vehicle goes under fast state; Begin to judge the incoming signal of steering wheel angle sensor 8 simultaneously, judge whether chaufeur has anxious operation of beating bearing circle.When stable going at a high speed (the not anxious direction of not beating of chaufeur), the dutycycle of the PWM of car body controller 7 control outputs, thus control the power of PWM ripple; So that control the aperture of electromagnetic throttle valve 3 valve bodies, thereby reasonably control the flow of electromagnetic throttle valve 3, because the variation of flow and flow velocity; Make that the pressure at electromagnetic throttle valve 3 two ends is different, produce difference of pressure, this difference of pressure is as the input of pressure bypass disc 4; When difference of pressure reaches certain value, overcome the elastic force of the elastic element (like spring) in the pressure control bypass disc 4, make bypass disc that a controlled rational aperture arranged; Part high-pressure and hydraulic oil flows away from bypass circulation; Thereby reduced the flow and the difference of pressure of electromagnetic throttle valve 3, mechanical closed loop control has been accomplished in whole loop, and this makes whole dynamic adjustments process mild, stable, reliable.In the process that the flow and the pressure of electromagnetic throttle valve 3 reduces, the input pressure and the flow of deflector 6 reduce, and chaufeur is just experienced the increase of steering effort, has increased the high speed road feel.
3, vehicle high speed emergency situation is anxious when beating direction, and car speed sensor 9 passes to car body controller 7 with GES, and car body controller 7 judges at this moment through calculating that vehicle goes under fast state.When vehicle high speed emergency situation is suddenly beaten direction; When for example detecting the bearing circle relative speed variation and being 180 °/second to 720 °/second; Car body controller 7 receives the incoming signal of steering wheel angle sensor 8 and judges chaufeur has anxious operation of beating bearing circle, controls electromagnetic throttle valve 3 with the pipeline complete opening through the PWM ripple, thereby guarantees sufficient hydraulic fluid flow rate; Make under this situation, to have enough hydraulic fluid flow rates and pressure, guarantee ease of steering.
Claims (7)
1. an automobile-used electric-controlled hydraulic servo steering system comprises: steering oil reservoir (1), power steerig pump (2), electromagnetic throttle valve (3), deflector (6), car body controller (7) and car speed sensor (9); The delivery port of steering oil reservoir (1) is connected via the input port of power steerig pump (2) with deflector (6); The delivery port of deflector (6) is connected with the input port of steering oil reservoir (1); Car body controller (7) is through the aperture of the signal input control electromagnetic throttle valve (3) of car speed sensor (9); Said automobile-used electric-controlled hydraulic servo steering system is characterised in that: also comprise a pressure bypass disc (4), this pressure bypass disc (4) has two input ports and a delivery port; Between said power steerig pump (2) and the deflector (6) said electromagnetic throttle valve (3) is set, the delivery port of power steerig pump (2) is connected with the input port of electromagnetic throttle valve (3), and the delivery port of electromagnetic throttle valve (3) is connected with the input port of deflector (6); The delivery port of power steerig pump (2) is connected with an input port of pressure bypass disc (4), and the delivery port of electromagnetic throttle valve (3) is connected with another input port of pressure bypass disc (4), and the delivery port of pressure bypass disc (4) is connected with the input port of power steerig pump (2).
2. automobile-used electric-controlled hydraulic servo steering system according to claim 1 is characterized in that: between said electromagnetic throttle valve (3) and the said pressure bypass disc (4) flow regulating valve (5) is set.
3. automobile-used electric-controlled hydraulic servo steering system according to claim 2 is characterized in that: said flow regulating valve (5) is a flow regulating valve open in usual.
4. automobile-used electric-controlled hydraulic servo steering system according to claim 1 is characterized in that: said car body controller (7) is through the aperture of output PWM ripple control electromagnetic throttle valve (3).
5. automobile-used electric-controlled hydraulic servo steering system according to claim 1; It is characterized in that: the signal input part of said car body controller (7) connects a steering wheel angle sensor (8); When vehicle is in high speed driving; Car body controller (7) is controlled the folding of electromagnetic throttle valve (3) through the bearing circle relative speed variation of steering wheel angle sensor (8) input.
6. automobile-used electric-controlled hydraulic servo steering system according to claim 5 is characterized in that: when said bearing circle relative speed variation is 180 °/second to 720 °/second, and said car body controller (7) control electromagnetic throttle valve (3) complete opening.
7. automobile-used electric-controlled hydraulic servo steering system according to claim 1 is characterized in that: said electromagnetic throttle valve (3) and pressure bypass disc (4) close on setting with steering oil reservoir (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200568463U CN202449057U (en) | 2012-02-21 | 2012-02-21 | Electronic control hydraulic power-assisted steering system for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200568463U CN202449057U (en) | 2012-02-21 | 2012-02-21 | Electronic control hydraulic power-assisted steering system for vehicles |
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| Publication Number | Publication Date |
|---|---|
| CN202449057U true CN202449057U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200568463U Expired - Fee Related CN202449057U (en) | 2012-02-21 | 2012-02-21 | Electronic control hydraulic power-assisted steering system for vehicles |
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| Country | Link |
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| CN (1) | CN202449057U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435758A (en) * | 2018-05-02 | 2019-11-12 | 郑州宇通客车股份有限公司 | The adjusting method of wheel steering system, vehicle and power steering |
-
2012
- 2012-02-21 CN CN2012200568463U patent/CN202449057U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110435758A (en) * | 2018-05-02 | 2019-11-12 | 郑州宇通客车股份有限公司 | The adjusting method of wheel steering system, vehicle and power steering |
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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: 20120926 Termination date: 20180221 |