CN110435759B - Vehicle, steering system and steering valve - Google Patents
Vehicle, steering system and steering valve Download PDFInfo
- Publication number
- CN110435759B CN110435759B CN201810411699.9A CN201810411699A CN110435759B CN 110435759 B CN110435759 B CN 110435759B CN 201810411699 A CN201810411699 A CN 201810411699A CN 110435759 B CN110435759 B CN 110435759B
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- valve
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- groove
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- 239000003921 oil Substances 0.000 claims abstract description 151
- 239000010727 cylinder oil Substances 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims 1
- 239000010720 hydraulic oil Substances 0.000 description 17
- 230000007246 mechanism Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
Abstract
The present invention relates to a vehicle, a steering system, and a steering valve. The steering system comprises a power cylinder, a bypass valve and a steering valve for controlling the power cylinder to act, wherein the steering valve comprises a valve sleeve and a valve core, an oil inlet is formed in the valve sleeve, power cylinder oil ports which are respectively communicated with pressure cavities on two sides of a piston in the power cylinder are formed in two circumferential sides of the oil inlet, an oil inlet groove and an oil return groove are formed in the valve core, bypass valve ports which are respectively communicated with oil inlet and outlet openings of the bypass valve are respectively formed in the valve sleeve, the two bypass valve ports are respectively arranged on one side, away from the oil inlet, of the two power cylinder oil ports, a bypass valve groove corresponding to the bypass valve ports is formed in the valve core between the oil inlet groove and the oil return groove, and in a unidirectional rotation stroke of the valve core, the bypass valve groove is communicated with the power cylinder oil ports to enable the bypass valve to be connected with the power cylinder in parallel, and a closed state which is isolated from an inlet in the power cylinder oil ports is formed. When the vehicle turns at a large angle, larger steering assistance can be obtained, and the safety of vehicle driving is improved.
Description
Technical Field
The present invention relates to a vehicle, a steering system, and a steering valve.
Background
With the improvement of living standard, people have put higher demands on the operability and safety of passenger cars during driving, especially for vehicle power steering systems, which require both steering stability at high speeds and steering portability at low speeds.
The Chinese patent application with publication number of CN102336216A and publication day of 2012.02.01 discloses a normal pressure type hydraulic steering valve and a steering system, the steering system comprises a steering valve, the steering valve comprises a valve sleeve and a valve core, an oil inlet hole and an upper cavity groove and a lower cavity groove which are respectively communicated with an upper cavity and a lower cavity of a power-assisted cylinder are formed in the valve sleeve, an oil inlet groove and an oil return communication groove are formed in the side wall of the valve core, the oil inlet groove corresponds to the position and the width of the oil inlet hole in the valve sleeve and is used as an oil inlet communication oil way, the oil return communication groove corresponds to the position and the width of the upper cavity groove and the lower cavity groove of the valve sleeve and is used as an oil return communication oil way, when a vehicle runs at a low speed, the steering system has lighter steering wheel stress and better steering portability, but when the vehicle speed is higher, the engine drives a steering oil pump to run at a high speed, the hydraulic power-assisted steering system can generate larger power, the steering wheel has smaller hand force, the vehicle easily loses sense of road, and the problem of 'drifting' of the vehicle is reduced.
The Chinese patent with the bulletin number of CN201890263U and the bulletin day of 2011.07.06 discloses an electric control hydraulic power-assisted steering system for a vehicle, which comprises a steering oil pump, a steering valve, a power cylinder, a controller, an oil tank, a vehicle speed sensor, a steering angular velocity sensor, an oil outlet pipe and an oil return pipe, wherein the power cylinder and the steering valve form a steering mechanism for providing steering power for the vehicle, an oil outlet of the steering oil pump is connected with the oil outlet pipe and is connected with the oil return pipe through the steering valve to be connected with the oil tank, the steering system also comprises a bypass channel provided with two or more electromagnetic valves, the diameters of the electromagnetic valves are different, the control signal input ends of the electromagnetic valves are respectively connected with the signal output ends of the controller, the opening and the closing of the electromagnetic valves are respectively controlled by the controller, so that the variable flow control under various modes can be realized, and the vehicle has good power-assisted characteristics in the whole driving process. However, when the vehicle turns or changes lanes in emergency, the electromagnetic valve with larger path on the bypass path fails and cannot be closed, so that the flow rate flowing into the steering valve is small, the hydraulic power is small, a driver cannot easily rotate the steering wheel, and traffic accidents are likely to be caused by untimely steering.
Disclosure of Invention
The invention aims to provide a steering system which solves the problem that traffic accidents can be caused when a bypass valve of an electric control hydraulic power steering system for a vehicle in the prior art fails; the invention also aims to provide a steering valve; the invention also aims to provide a vehicle.
In order to achieve the above purpose, the technical scheme of the steering system of the invention is as follows: the steering system comprises a power cylinder, a bypass valve and a steering valve for controlling the power cylinder to act, wherein the steering valve comprises a valve sleeve and a valve core, an oil inlet is formed in the valve sleeve, power cylinder oil ports which are respectively communicated with pressure cavities on two sides of a piston in the power cylinder are formed in two circumferential sides of the oil inlet, an oil inlet groove and an oil return groove are formed in the valve core, bypass valve ports which are respectively communicated with oil inlet and outlet ports of the bypass valve are respectively formed in the valve sleeve, the two bypass valve ports are respectively arranged on one side, away from the oil inlet, of each power cylinder oil port, a bypass valve groove corresponding to the bypass valve ports is formed in the valve core between the oil inlet groove and the oil return groove, and in a unidirectional rotation stroke of the valve core, the bypass valve groove is communicated with the power cylinder oil ports to enable the bypass valve to be connected with the power cylinder in parallel, and is in a closed state isolated from an inlet in the power cylinder oil ports.
The beneficial effects are as follows: when the steering valve of the vehicle steering system turns at a large angle, the bypass valve groove of the steering valve is isolated from the inlet in the oil port of the power-assisted cylinder, so that an oil way leading to the bypass valve port is cut off, even if the electromagnetic valve fails in the turning process, the steering system of the vehicle obtains larger steering power, and the driving safety of the vehicle is improved.
The center of the valve core is provided with an oil return port, and the oil return groove is communicated with the oil return port through an oil return channel arranged in the valve core.
And in the initial state of the steering valve, the oil ports of the two power-assisted cylinders are communicated with the oil inlet groove.
The oil inlets are arranged at equal intervals along the circumferential direction of the valve sleeve.
The bypass valve spool has a triangular cross-sectional shape.
The beneficial effects are as follows: the cross section of the bypass valve port is triangular, and the cross section can correspond to the valve sleeve direction through the deep front change of the bypass valve port, but not through changing the width change of the blade, so that the structural requirement of the steering valve is met.
The technical scheme of the steering valve is as follows: the steering valve comprises a valve sleeve and a valve core, wherein an oil inlet is formed in the valve sleeve, booster cylinder oil ports which are used for being communicated with pressure cavities on two sides of a piston in a booster cylinder respectively are formed in two circumferential sides of the oil inlet, an oil inlet groove and an oil return groove are formed in the valve core, bypass valve ports which are used for being communicated with oil inlet and outlet ports of a bypass valve respectively are formed in the valve sleeve, the two bypass valve ports are respectively arranged on one side, far away from the oil inlet, of the two booster cylinder oil ports, a bypass valve groove corresponding to the bypass valve ports is formed in the valve core between the oil inlet grooves and the oil return groove, and in a unidirectional rotation stroke of the valve core, the bypass valve groove is provided with a parallel stroke which is used for being communicated with the booster cylinder oil ports to enable the bypass valve to be connected with the booster cylinder in parallel, and a closed state which is isolated from an inlet in the booster cylinder oil ports is formed.
The center of the valve core is provided with an oil return port, and the oil return groove is communicated with the oil return port through an oil return channel arranged in the valve core.
And in the initial state of the steering valve, the oil ports of the two power-assisted cylinders are communicated with the oil inlet groove.
The oil inlets are arranged at equal intervals along the circumferential direction of the valve sleeve.
The bypass valve spool has a triangular cross-sectional shape.
The technical scheme of the vehicle is as follows: the vehicle comprises a steering system, wherein the steering system comprises a power cylinder, a bypass valve and a steering valve used for controlling the power cylinder to act, the bypass valve is connected with a control device, the steering valve comprises a valve sleeve and a valve core, an oil inlet is formed in the valve sleeve, power cylinder oil ports which are respectively communicated with pressure cavities on two sides of a piston in the power cylinder are formed in two circumferential sides of the oil inlet, an oil inlet groove and an oil return groove are formed in the valve core, bypass valve ports which are respectively communicated with the oil inlet and the oil outlet of the bypass valve are formed in the valve sleeve, two bypass valve ports are respectively arranged on one side, far away from the oil inlet, of the two power cylinder oil ports, a bypass valve groove corresponding to the bypass valve ports is formed in the valve core between the oil inlet groove and the oil return groove, and in a unidirectional rotation stroke of the valve core, the bypass valve groove is communicated with the power cylinder oil port to enable the bypass valve to be connected with the power cylinder in parallel connection stroke, and a closed state which is isolated from an inlet in the power cylinder oil port.
The center of the valve core is provided with an oil return port, and the oil return groove is communicated with the oil return port through an oil return channel arranged in the valve core.
And in the initial state of the steering valve, the oil ports of the two power-assisted cylinders are communicated with the oil inlet groove.
The oil inlets are arranged at equal intervals along the circumferential direction of the valve sleeve.
The bypass valve spool has a triangular cross-sectional shape.
Drawings
Fig. 1 is a schematic view of a steering system of an embodiment 1 of a vehicle of the present invention on a vehicle;
FIG. 2 is a schematic illustration of the operation of the steering system of the vehicle shown in FIG. 1;
FIG. 3 is a logic control of the steering system of embodiment 1 of the vehicle of the present invention FIG. 1;
FIG. 4 is a logic control of the steering system of embodiment 1 of the vehicle of the present invention FIG. 2;
fig. 5 is a schematic structural view of a steering valve of a steering system of embodiment 1 of the vehicle of the present invention;
FIG. 6 is a schematic view of the oil path of the steering valve of FIG. 5 when the vehicle is traveling straight;
FIG. 7 is a schematic view of the oil passage of the steering valve of FIG. 5 during a small angle turn of the vehicle;
fig. 8 is a schematic view of the oil passage of the steering valve shown in fig. 5 when the vehicle makes a sharp turn or changes lanes.
Reference numerals illustrate: 1. a steering oil pump; 2. a hydraulic oil tank; 3. torque, rotation angle and pressure signals; ecu;5. an overflow valve; 6. a pressure stabilizing valve; 7. a magneto-rheological solenoid valve; 8. a steering valve; 80. a valve sleeve; 81. a valve core; 82. an oil inlet; 83. an oil port of the power cylinder; 84. a bypass valve port; 85. an oil inlet groove; 86. an oil return groove; 87. an oil return port; 88. an oil return passage; 89. a bypass valve spool; 9. a booster cylinder; 10. a hydraulic line; 11. a vehicle speed signal; 12. a steering column; 13. a steering rocker arm; 14. a steering wheel; 15. a steering tie rod; 16. steering knuckle arm; 17. a steering wheel; 18. a steering system.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
In an embodiment 1 of the vehicle of the present invention, as shown in fig. 1 to 8, the arrow direction in the drawing is the flow direction of hydraulic oil, the steering wheel 14 of the vehicle is connected with the steering column 12, the steering column 12 is connected with the steering system 18, the steering system 18 is connected with the steering rocker 13, the steering rocker 13 is connected with the steering straight pull rod 15, the steering straight pull rod 15 is connected with the knuckle arm 16, the knuckle arm 16 is connected with the steering wheel 17, wherein the steering system 18 comprises a steering mechanism for outputting steering assistance and a steering oil pump 1 for providing hydraulic oil to the steering mechanism, the steering mechanism comprises a steering valve 8 and a booster cylinder 9, the steering oil pump 1 is connected with a hydraulic oil tank 2 through a hydraulic pipeline 10, the steering system 18 further comprises a bypass valve for changing the flow rate of hydraulic oil entering the steering valve 8, the bypass valve and the steering mechanism are connected in parallel to form a bypass circuit, and the bypass valve is a magneto-rheological valve 7.
The steering valve 8 comprises a valve sleeve 80 and a valve core 81, wherein an oil inlet 82 is arranged on the valve sleeve 80, a power cylinder oil port 83 which is respectively communicated with pressure cavities on two sides of a piston in a power cylinder is arranged on two circumferential sides of the oil inlet 82, an oil inlet groove 85 and an oil return groove 86 are arranged on the valve core 81, a bypass valve port 84 which is respectively communicated with oil inlet and outlet ports of the magnetic current variable valve 7 is also arranged on the valve sleeve 80, the two bypass valve ports 84 are respectively arranged on one side of the two power cylinder oil ports 83 away from the oil inlet 82, a bypass valve groove 89 which corresponds to the bypass valve port 84 is arranged on the valve core 81 between the oil inlet 82 and the oil return groove 86, and in the unidirectional rotation stroke of the valve core 81, the bypass valve groove 89 is provided with a parallel stroke which is communicated with the power cylinder oil port 83 to enable the magnetic current variable valve 7 to be connected with the power cylinder 9 in parallel, and also provided with a closed state which is isolated from an inlet in the power cylinder oil port 83. The center of the valve spool 81 is provided with an oil return port 87 communicating with the hydraulic oil tank 2, and an oil return groove 86 communicates with the oil return port 87 through an oil return passage 88 provided in the valve spool 81. In the initial state of the steering valve 8, both the cylinder ports 83 are communicated with the oil inlet groove 85. The bypass valve spool 89 has a triangular cross-sectional shape. The oil inlets 82 are equally spaced apart in the circumferential direction of the valve housing 80.
The magneto-rheological valve 7 is connected with a control device for controlling the opening degree of the magneto-rheological valve 7, and the control device is connected with a sensor for detecting the working condition of the vehicle in a signal way. The sensors include a vehicle speed sensor for detecting the vehicle speed, a rotation angle sensor for detecting the weighing rotation angle, a torque sensor for detecting the torque of the steering wheel 14, and a pressure signal sensor for detecting the pressure of the booster cylinder 9, and the torque sensor and the rotation angle sensor are integrally provided in the steering column 12.
The control device is an ECU4, and the ECU4 includes a PID controller and a current controller. The hydraulic loop is connected with an overflow valve 5 in parallel, the bypass loop is provided with a pressure stabilizing valve 6 connected with a magneto-rheological electromagnetic valve 7 in series, and the pressure stabilizing valve 6 can ensure the pressure stability of hydraulic oil entering the magneto-rheological electromagnetic valve 7. The relationship between the opening h of the magneto-rheological solenoid valve 7 and the current I in the control logic of the ECU4 is: h=k×i (k is the effective rigidity of the magneto-rheological valve), when the vehicle speed is greater than 90 ㎞/h, the current is controlled to be 1.28A, and the magneto-rheological valve 7 has a corresponding opening degree; when the vehicle speed is less than 20 ㎞/h, the current is controlled to be 0.63A, and the magneto-rheological solenoid valve 7 has corresponding opening; when the speed of the vehicle is between 20 ㎞/h and 90 ㎞/h, the current is regulated at a speed according to the speed of the vehicle, so that the driver obtains the optimal hand force. The control device also comprises a program module for monitoring whether the electromagnetic valve operates normally or not and an alarm device for alarming when the electromagnetic valve fails, wherein the alarm device is a buzzer arranged on an instrument desk of the vehicle.
The steering wheel 14 is connected with the steering valve 8 through a torsion bar, and the larger the rotation speed of the steering wheel 14 is, the larger the torsion bar torque is, and the larger the relative rotation angle of the steering valve 8 is, so that the corresponding relation between the torsion bar torque and the rotation angle of the steering valve 8 is the prior art and is not described in detail.
When the vehicle runs straight, two booster cylinder oil ports 83 and two bypass valve ports of the steering valve 8 are opened, hydraulic oil enters an oil inlet groove 85 of the steering valve 8 through an oil inlet 82, pressure cavities on two sides of a piston of the booster cylinder 9 are communicated with the hydraulic oil tank 2 through the bypass valve groove, the bypass valve ports, the magneto-rheological solenoid valve 7 and an oil return groove, and the pressure of the pressure cavities on two sides of the piston of the booster cylinder 9 is balanced.
When the vehicle turns in situ or turns at a low speed, the valve core 81 of the steering valve 8 rotates by a small angle, one of the power-assisted cylinder oil ports and a bypass valve port beside the power-assisted cylinder oil port are opened, hydraulic oil respectively enters a pressure cavity at one side of a piston of the power-assisted cylinder 9 and a bypass valve groove communicated with the magneto-rheological valve 7 through the opened power-assisted cylinder oil port, a vehicle speed sensor, a torque sensor and a rotation angle sensor acquire the torque of the steering wheel 14 and the rotation angle of the steering wheel 14 and transmit the torque and rotation angle signals to the ECU4, the ECU4 analyzes the vehicle speed signals 11 and the torque, rotation angle and pressure signals 3, a current controller of the ECU4 combines a steering power characteristic curve database (a plurality of drivers perform real vehicle tests to verify the optimal steering force of the drivers in different vehicle speeds, acquire the optimal steering force and perform curve fitting to obtain the steering power characteristic curve database), and then the opening degree of the magneto-rheological valve 7 is controlled by a proper current is output to be reduced, so that the flow of the hydraulic oil entering the pressure cavity at one side of the piston of the power-assisted cylinder 9 is increased, and the steering power assistance of the hydraulic system is increased.
When the vehicle turns at a high speed and a small angle, the valve core 81 of the steering valve 8 rotates by a small angle, one of the power cylinder oil ports and the bypass valve port beside the power cylinder oil port are opened, hydraulic oil enters a pressure cavity at one side of a piston of the power cylinder 9 and a bypass valve groove communicated with the magnetic flow solenoid valve 7 respectively through the opened power cylinder oil ports, a vehicle speed sensor, a torque sensor and a rotation angle sensor acquire the torque of the steering wheel 14 and the rotation angle signal of the steering wheel 14 and transmit the torque and the rotation angle signal to the ECU4, a current controller of the ECU4 controls the opening of the magnetic flow solenoid valve 7 to be increased by analyzing the vehicle speed signal 11 and the torque, the rotation angle and the pressure signal 3 and combining a steering power characteristic curve database, so that the opening of the magnetic flow solenoid valve 7 is controlled to be increased, the flow of hydraulic oil entering the upper cavity of the power cylinder 9 is reduced, the steering power of a hydraulic system is reduced, the steering power is reduced, the steering arm 13 transmits the hand power to the steering system 18 through the steering arm 16 and the steering straight pull rod 15, the steering arm 13 transmits the hand power to the steering system 18 through the rotating motion, and the steering system 18 transmits the hand power to the steering wheel 14 through the steering column 12, and the hand power to the steering column 14, and the driver can obviously feel the safety and stability of the vehicle.
When the vehicle suddenly changes a road or turns, the valve core 81 of the steering valve 8 rotates by a larger angle, one of the booster cylinder oil ports and the bypass valve ports beside the booster cylinder oil port are closed, the upper cavity valve port 82 is opened, hydraulic oil completely enters the pressure cavity on one side of the piston of the booster cylinder 9 through the upper cavity valve port 82, the ECU4 converts a corner signal fed back by the corner sensor into a rotating speed signal and processes the rotating speed signal, and the current is increased to control the magneto-rheological valve 7 to be closed, so that the flow of the hydraulic oil entering the upper cavity of the booster cylinder 9 is increased, and the steering booster of the hydraulic system is increased. If the magneto-rheological electromagnetic valve 7 fails, hydraulic oil cannot enter the bypass valve port because the bypass valve port is in a closed state, at the moment, the magneto-rheological electromagnetic valve 7 does not work any more, and the hydraulic oil completely enters a pressure cavity at one side of a piston of the booster cylinder 9, so that larger steering booster is provided for a driver; in addition, if the magneto-rheological electromagnetic valve 7 fails, the ECU detects that the current of the magneto-rheological electromagnetic valve is unstable or suddenly changed, and the ECU sends a command to the buzzer of the instrument desk to remind a driver of needing to repair the magneto-rheological electromagnetic valve 7, so that the safety of vehicle driving is improved.
Embodiment 2 of the vehicle of the present invention is different from embodiment 1 in that both the cylinder ports 83 are isolated from the oil feed groove 85 and are not communicated in the initial state of the steering valve 8.
In other embodiments, the bypass valve may be a solenoid valve in an electrically controlled hydraulic power steering system for vehicles in the prior art, or the bypass valve may be a solenoid proportional valve.
In other embodiments, the bypass valve spool may have other cross-sectional shapes, such as arcuate, rectangular, or trapezoidal, as long as the valve spool of the diverter valve is capable of cutting off the bypass valve port when the angle of rotation is large.
An embodiment of the steering system of the present invention is the same as the steering system of any of the embodiments of the vehicle of the present invention described above, and will not be described again.
The steering valve embodiment of the present invention is the same as the steering valve in any of the embodiments of the vehicle of the present invention described above, and the description thereof will not be repeated.
Claims (15)
1. The steering system comprises a power cylinder, a bypass valve and a steering valve for controlling the power cylinder to act, wherein the steering valve comprises a valve sleeve and a valve core, an oil inlet is formed in the valve sleeve, power cylinder oil ports which are respectively communicated with pressure cavities on two sides of a piston in the power cylinder are formed in two circumferential sides of the oil inlet, and an oil inlet groove and an oil return groove are formed in the valve core, and the steering system is characterized in that: the valve sleeve is provided with bypass valve ports which are respectively communicated with oil inlet and outlet ports of the bypass valve, the two bypass valve ports are respectively arranged on one side of the two booster cylinder oil ports away from the oil inlet, a bypass valve groove corresponding to the bypass valve ports is arranged between the oil inlet groove and the oil return groove on the valve core, and in the unidirectional rotation stroke of the valve core, the bypass valve groove is provided with a parallel stroke which is communicated with the booster cylinder oil ports to enable the bypass valve to be connected with the booster cylinder in parallel, and is also provided with a closing state which is isolated from an inlet in the booster cylinder oil ports.
2. The steering system of claim 1, wherein: the center of the valve core is provided with an oil return port, and the oil return groove is communicated with the oil return port through an oil return channel arranged in the valve core.
3. Steering system according to claim 1 or 2, characterized in that: and in the initial state of the steering valve, the oil ports of the two power-assisted cylinders are communicated with the oil inlet groove.
4. Steering system according to claim 1 or 2, characterized in that: the bypass valve spool has a triangular cross-sectional shape.
5. Steering system according to claim 1 or 2, characterized in that: the oil inlets are arranged at equal intervals along the circumferential direction of the valve sleeve.
6. The steering valve comprises a valve sleeve and a valve core, wherein an oil inlet is formed in the valve sleeve, booster cylinder oil ports which are used for being respectively communicated with pressure cavities on two sides of a piston in a booster cylinder are formed in two circumferential sides of the oil inlet, and an oil inlet groove and an oil return groove are formed in the valve core, and the steering valve is characterized in that: the valve sleeve is provided with bypass valve ports which are respectively communicated with oil inlet and outlet ports of the bypass valve, the two bypass valve ports are respectively arranged on one side of the two booster cylinder oil ports away from the oil inlet, a bypass valve groove corresponding to the bypass valve ports is arranged between the oil inlet groove and the oil return groove on the valve core, and in the unidirectional rotation stroke of the valve core, the bypass valve groove is provided with a parallel stroke which is communicated with the booster cylinder oil ports to enable the bypass valve to be connected with the booster cylinder in parallel, and is also provided with a closing state which is isolated from an inlet in the booster cylinder oil ports.
7. The steering valve of claim 6, wherein: the center of the valve core is provided with an oil return port, and the oil return groove is communicated with the oil return port through an oil return channel arranged in the valve core.
8. The steering valve according to claim 6 or 7, characterized in that: and in the initial state of the steering valve, the oil ports of the two power-assisted cylinders are communicated with the oil inlet groove.
9. The steering valve according to claim 6 or 7, characterized in that: the oil inlets are arranged at equal intervals along the circumferential direction of the valve sleeve.
10. The steering valve according to claim 6 or 7, characterized in that: the bypass valve spool has a triangular cross-sectional shape.
11. The utility model provides a vehicle, includes a steering system, and a steering system includes helping hand jar, bypass valve and is used for controlling the steering valve of helping hand jar action, the bypass valve is connected with controlling means, the steering valve includes valve barrel and case, is equipped with the oil inlet on the valve barrel, and the circumference both sides of oil inlet are equipped with the helping hand jar hydraulic fluid port that communicates with each other respectively with the pressure chamber of helping hand jar interior piston both sides, be equipped with oil inlet groove and oil return groove on the case, its characterized in that: the valve sleeve is provided with bypass valve ports which are respectively communicated with oil inlet and outlet ports of the bypass valve, the two bypass valve ports are respectively arranged on one side of the two booster cylinder oil ports away from the oil inlet, a bypass valve groove corresponding to the bypass valve ports is arranged between the oil inlet groove and the oil return groove on the valve core, and in the unidirectional rotation stroke of the valve core, the bypass valve groove is provided with a parallel stroke which is communicated with the booster cylinder oil ports to enable the bypass valve to be connected with the booster cylinder in parallel, and is also provided with a closing state which is isolated from an inlet in the booster cylinder oil ports.
12. The vehicle according to claim 11, characterized in that: the center of the valve core is provided with an oil return port, and the oil return groove is communicated with the oil return port through an oil return channel arranged in the valve core.
13. The vehicle according to claim 11 or 12, characterized in that: and in the initial state of the steering valve, the oil ports of the two power-assisted cylinders are communicated with the oil inlet groove.
14. The vehicle according to claim 11 or 12, characterized in that: the oil inlets are arranged at equal intervals along the circumferential direction of the valve sleeve.
15. The vehicle according to claim 11 or 12, characterized in that: the bypass valve spool has a triangular cross-sectional shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411699.9A CN110435759B (en) | 2018-05-02 | 2018-05-02 | Vehicle, steering system and steering valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810411699.9A CN110435759B (en) | 2018-05-02 | 2018-05-02 | Vehicle, steering system and steering valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110435759A CN110435759A (en) | 2019-11-12 |
| CN110435759B true CN110435759B (en) | 2024-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810411699.9A Active CN110435759B (en) | 2018-05-02 | 2018-05-02 | Vehicle, steering system and steering valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110435759B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2406896Y (en) * | 2000-02-16 | 2000-11-22 | 荆州恒隆汽车零部件制造有限公司 | Two characteristic rotary valve for powered steering of vehicle |
| CN208360298U (en) * | 2018-05-02 | 2019-01-11 | 郑州宇通客车股份有限公司 | A kind of vehicle, steering system and switching valve |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0834361A (en) * | 1994-07-21 | 1996-02-06 | Jidosha Kiki Co Ltd | Power steering device |
| JP3494768B2 (en) * | 1995-09-04 | 2004-02-09 | ユニシア ジェーケーシー ステアリングシステム株式会社 | Power steering device |
| JPH10258755A (en) * | 1997-03-21 | 1998-09-29 | Koyo Seiko Co Ltd | Power steering device |
| CN200964129Y (en) * | 2006-10-26 | 2007-10-24 | 江门市兴江转向器有限公司 | Electric control hydraulic pressure power steering device assembly |
-
2018
- 2018-05-02 CN CN201810411699.9A patent/CN110435759B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2406896Y (en) * | 2000-02-16 | 2000-11-22 | 荆州恒隆汽车零部件制造有限公司 | Two characteristic rotary valve for powered steering of vehicle |
| CN208360298U (en) * | 2018-05-02 | 2019-01-11 | 郑州宇通客车股份有限公司 | A kind of vehicle, steering system and switching valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110435759A (en) | 2019-11-12 |
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Country or region after: China Address after: No. 6, Yutong Road, Guancheng Hui District, Zhengzhou, Henan 450061 Applicant after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Road, Guancheng District, Zhengzhou City, Henan Province Applicant before: ZHENGZHOU YUTONG BUS Co.,Ltd. Country or region before: China |
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