CN106882264B - Electric control variable flow steering power assisting system - Google Patents
Electric control variable flow steering power assisting system Download PDFInfo
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- CN106882264B CN106882264B CN201710199879.0A CN201710199879A CN106882264B CN 106882264 B CN106882264 B CN 106882264B CN 201710199879 A CN201710199879 A CN 201710199879A CN 106882264 B CN106882264 B CN 106882264B
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- 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
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- 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
- B62D5/065—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 specially adapted means for varying pressurised fluid supply based on need, e.g. on-demand, variable assist
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- 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
- B62D5/10—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 power unit
- B62D5/12—Piston and cylinder
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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 invention relates to the technical field of vehicle power-assisted steering, in particular to an electric control variable flow steering power-assisted system which comprises a gear pump, a flow regulating unit, a steering regulating unit and an EHPS electronic control unit, wherein the gear pump is driven to rotate by a motor, the motor is in communication connection with the EHPS electronic control unit, an oil inlet of the gear pump is connected with a liquid storage tank, an oil outlet of the gear pump is connected with the steering regulating unit, the flow regulating unit regulates the engagement length of a piston gear and a fixed gear of the gear pump, and the hydraulic oil flow entering the steering regulating unit is regulated to change the power-assisted steering. The system does not provide assistance when the vehicle is in a straight line, provides larger assistance when the vehicle is in low-speed steering, is convenient for a driver to lightly operate the steering wheel, provides smaller assistance when the vehicle is in high-speed steering, and realizes road feel of driving of the driver.
Description
Technical Field
The invention relates to the technical field of vehicle power-assisted steering, in particular to an electric control variable flow power-assisted steering system.
Background
Vehicle steering systems can be classified into power-free steering systems and power-assisted steering systems.
With technological development and adoption of new technologies, there are power steering systems gradually evolving from conventional Hydraulic Power Steering (HPS) (Hydraulic Power Steering) systems to electro-hydraulic power steering (EHPS) (Electronic Hydrautic Power Steering) systems and Electric Power Steering (EPS) (Etectronic Power Steering) systems.
When the vehicle is turned, the front axle load can reach thousands of newtons due to the friction between the wheels and the ground, and the steering wheel is perceived to be heavier by rotating the steering wheel with the arm without assistance, so that the problem of steering portability needs to be solved by adopting the assistance steering.
With the increase of the vehicle speed, the friction force between the wheels and the ground is reduced, under the condition of providing the same assistance, the steering wheel is felt to fly at a high speed, and in addition, when the steering wheel rotates at a high speed, the assistance is easy to have serious hysteresis, so that the problems of steering wheel fly and assistance following performance are required to be solved by adopting assistance adjustment.
In a conventional hydraulic power-assisted steering system, an engine is used for driving a steering oil pump to work, the flow rate and the pressure of the oil pump are increased along with the increase of the rotating speed of the engine, when steering, hydraulic oil flows into one cylinder, and part of oil flows back into the other cylinder. Thus, a pressure difference is generated between the two cylinders, thereby generating power assistance. The higher the flow and pressure of the oil pump, the greater the assistance force that is generated. For vehicles, the higher the speed of the vehicle, the faster the speed of the engine, and thus the greater the flow and pressure of the oil pump, and the corresponding power assist generated, resulting in steering wheel drift at high speeds, the hydraulic power assisted steering system needs to control the flow rate into the oil cylinder so that the flow rate does not change as the speed of the oil pump changes.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an electric control variable flow steering power assisting system which does not provide power when a vehicle is in a straight direction, provides larger power when the vehicle is in low-speed steering, is convenient for a driver to operate a steering wheel lightly, provides smaller power when the vehicle is in high-speed steering, and realizes road feel of driving of the driver.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides an automatically controlled variable flow power assisted steering system, includes gear pump, flow control unit, turns to the adjustment unit and EHPS electronic control unit, and the gear pump is rotated by motor drive, and motor and EHPS electronic control unit communication connection, the oil inlet of gear pump link to each other with a liquid storage pot, and the oil-out of gear pump is connected with turning to the adjustment unit, and the engagement length of the piston gear and the fixed gear of flow control unit regulation gear pump adjusts the hydraulic oil flow that gets into the adjustment unit and changes the size of power assisted steering.
The flow regulating unit comprises a flow regulating hydraulic cylinder, a floating piston is arranged in the flow regulating hydraulic cylinder, and the floating piston divides the flow regulating hydraulic cylinder into a left flow regulating cylinder and a right flow regulating cylinder; a piston gear of the gear pump is arranged on the floating piston, and a control device controls the left and right movement of the floating piston.
And an adjusting spring is arranged in the left flow adjusting cylinder, one end of the adjusting spring is connected with the floating piston, and the other end of the adjusting spring is propped against the inner wall of the left flow adjusting cylinder.
The control device is a control electromagnetic valve, the control electromagnetic valve is in communication connection with the EHPS electronic control unit, the control electromagnetic valve is a three-position five-way electromagnetic valve, the control electromagnetic valve is respectively connected with the left flow regulating cylinder, the right flow regulating cylinder and the liquid storage tank, and the oil outlet of the gear pump is connected with the steering regulating unit through the control electromagnetic valve.
The steering adjusting unit comprises a steering power cylinder, a steering pull rod and a steering distributing valve; a power-assisted piston is arranged in the power-assisted steering cylinder, and divides the power-assisted steering cylinder into a left power-assisted adjusting cylinder and a right power-assisted adjusting cylinder; the steering pull rod is arranged in the steering power-assisted cylinder, and two ends of the steering pull rod extend out of the steering power-assisted cylinder respectively and are connected with the wheel steering knuckle; the booster piston is fixedly connected with the steering pull rod; the steering distributing valve is connected with the control electromagnetic valve; the steering distribution valve is respectively connected with the left power-assisted adjusting cylinder and the right power-assisted adjusting cylinder; the steering distributing valve is connected with the liquid storage tank.
The steering distribution valve is connected with the control electromagnetic valve through an oil inlet pipe, the steering distribution valve is connected with the liquid storage tank through an oil return pipe, a bypass pipe is arranged between the oil inlet pipe and the oil return pipe, and a pressure limiting valve is arranged on the bypass pipe.
The invention has the following beneficial effects:
1. when the vehicle runs straight, the gear pump is at the minimum meshing position, the hydraulic oil flow is minimum, and no assistance is provided.
2. When the vehicle runs in low-speed steering, the meshing length of the piston gear of the gear pump and the fixed gear is gradually increased, the hydraulic oil flow is also gradually increased until the maximum power required by steering is increased, the maximum power for steering the vehicle is provided, the problem that the steering wheel is heavy when the steering wheel is manually rotated under the condition of no power or small power is solved, the operation of a driver is facilitated, and the portability is provided for the operation of the driver in low-speed steering running.
3. In the invention, in order to meet the road feel of a driver in high-speed steering running, the meshing length of the piston gear and the fixed gear of the gear pump is gradually reduced, the hydraulic oil flow is also gradually reduced, and the steering power is gradually reduced, so that the driver needs larger steering control force in high-speed steering running operation, and the road feel of high-speed driving is realized.
Drawings
FIG. 1 is a schematic view showing the structure of the present invention in a straight running;
FIG. 2 is a schematic view showing the structure of the present invention during low-speed steering;
fig. 3 is a schematic view showing the structure of the present invention during high-speed steering running.
Reference numerals illustrate:
1-flow regulating unit, 11-flow regulating hydraulic cylinder, 111-floating piston, 112-left flow regulating cylinder, 113-right flow regulating cylinder, 114-regulating spring, 12-gear pump, 121-fixed gear, 122-piston gear, 13-control solenoid valve, 2-steering regulating unit, 21-steering booster cylinder, 211-booster piston, 212-left booster regulating cylinder, 213-right booster regulating cylinder, 22-steering pull rod, 23-steering distributing valve, 3-EHPS electronic control unit, 31-ECU electronic control unit, 4-motor, 5-liquid storage tank, 6-pressure limiting valve, 101-first oil inlet pipe, 102-left flow regulating oil pipe, 103-right flow regulating oil pipe, 104-first oil return pipe, 105-second oil inlet pipe, 106-left booster regulating oil pipe, 107-right booster regulating oil pipe, 108-second oil return pipe and 109-bypass pipe.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
referring to fig. 1 to 3, an electrically controlled variable flow steering assist system includes a gear pump 12, a flow adjustment unit 1, a steering adjustment unit 2, and an EHPS electronic control unit 3;
the flow regulating unit 1 comprises a flow regulating hydraulic cylinder 11 and a control electromagnetic valve 13;
a floating piston 111 is arranged in the flow regulating hydraulic cylinder 11, and the floating piston 111 divides the flow regulating hydraulic cylinder 11 into a left flow regulating cylinder 112 and a right flow regulating cylinder 113; an adjusting spring 114 is arranged in the left flow adjusting cylinder 112, one end of the adjusting spring 114 is connected with the floating piston 111, and the other end of the adjusting spring is propped against the inner wall of the left flow adjusting cylinder 112;
the gear pump 12 comprises a fixed gear 121 and a piston gear 122 which are meshed with each other, and the fixed gear 121 is driven to rotate by a motor 4; the piston gear 122 is mounted on the floating piston 111 through a rotating shaft, and the floating piston 111 is controlled to move left and right by a control device so as to adjust the meshing length of the piston gear 122 and the fixed gear 121; an oil inlet of the gear pump 12 is connected with a liquid storage tank 5, and an oil outlet of the gear pump 12 is connected with a control electromagnetic valve 13 through a first oil inlet pipe 101;
the control device is a control electromagnetic valve 13, and in this embodiment, the control electromagnetic valve 13 is a three-position five-way electromagnetic valve; the control electromagnetic valve 13 is connected with a left flow regulating cylinder 112 and a right flow regulating cylinder 113 through a left flow regulating oil pipe 102 and a right flow regulating oil pipe 103 respectively; the control electromagnetic valve 13 is connected with the liquid storage tank 5 through a first oil return pipe 104;
the steering adjustment unit 2 includes a steering cylinder 21, a tie rod 22, and a steering distributing valve 23;
a booster piston 211 is arranged in the steering booster cylinder 21, and the booster piston 211 divides the steering booster cylinder 21 into a left booster regulating cylinder 212 and a right booster regulating cylinder 213; the steering tie rod 22 is arranged in the steering cylinder 21 in parallel with the length direction of the steering cylinder 21, and two ends of the steering tie rod extend out of the steering cylinder 21 respectively to be connected with wheel knuckles so as to adjust the steering of wheels; the booster piston 211 is fixedly connected to the middle part of the steering tie rod 22;
the steering distribution valve 23 is connected with the control electromagnetic valve 13 through a second oil inlet pipe 105; the steering distribution valve 23 is connected to the left and right assist adjustment cylinders 212 and 213 through the left and right assist adjustment oil pipes 106 and 107, respectively; the steering distributing valve 23 is connected with the liquid storage tank 5 through a second oil return pipe 108;
a bypass pipe 109 is provided between the second oil intake pipe 105 and the second oil return pipe 108, and a pressure limiting valve 6 is provided on the bypass pipe 109 to limit the excessive pressure of the oil flowing into the steering cylinder 21 through the steering distributing valve 23.
The EHPS electronic control unit 3 comprises an ECU electronic control unit 31, a vehicle speed sensor and a torque sensor, wherein the ECU electronic control unit 31 is respectively in communication connection with the vehicle speed sensor, the torque sensor and the motor 4, the vehicle speed sensor is used for detecting the speed of the vehicle and feeding back detected vehicle speed data to the ECU electronic control unit 31, the torque sensor is used for detecting the steering angle of the steering wheel and feeding back steering data to the ECU electronic control unit 31, the ECU electronic control unit 31 receives signals sent by the vehicle speed sensor and the torque sensor, and after conversion, the corresponding electric signals are sent to the control electromagnetic valve 13 and the motor 4 so as to control the speed of the rotating speed of the motor 4 and control the opening and closing of the electromagnetic valve 13.
The workflow of the above system is as follows:
when the vehicle runs straight, referring to fig. 1, the ecu electronic control unit 31 receives signals sent by a vehicle speed sensor and a torque sensor and converts the signals into corresponding electric signals to be sent to the control motor 4 and the control electromagnetic valve 13, at the moment, the meshing length of the fixed gear 121 and the piston gear 122 is at the minimum value, the valve core of the control electromagnetic valve 13 is at the middle position, the first oil inlet pipe 101 is communicated with the second oil inlet pipe 105, and the left flow regulating oil pipe 102 and the right flow regulating oil pipe 103 are not communicated with the control electromagnetic valve 13; the second oil inlet pipe 105 is respectively communicated with the left power-assisted adjusting oil pipe 106 and the right power-assisted adjusting oil pipe 107, and the steering distributing valve 23 is communicated with the liquid storage tank 5 through a second oil return pipe 108;
the motor 4 rotates to drive the fixed gear 121 to rotate, the fixed gear 121 drives the piston gear 122 to rotate, oil in the liquid storage tank 5 is pumped out, hydraulic oil sequentially flows into the control electromagnetic valve 13 through the oil inlet and the oil outlet of the gear pump 12 and the first oil inlet pipe 101, flows into the steering distribution valve 23 through the second oil inlet pipe 105, flows into the steering power cylinder 21 through the left power-assisted adjusting oil pipe 106 and the right power-assisted adjusting oil pipe 107 respectively, and is respectively filled with the left power-assisted adjusting cylinder 212 and the right power-assisted adjusting cylinder 213, and at the moment, the pressure of the two cylinders is equal, because the gear pump 12 is at the minimum meshing position, the hydraulic oil flow is minimum, no power assistance is generated, and the oil consumption of a vehicle during running is reduced; after hydraulic oil fills the left power assist adjustment cylinder 212 and the right power assist adjustment cylinder 213, the hydraulic oil flows back to the reservoir tank 5 through the second oil return pipe 108.
When the vehicle runs in a low-speed steering mode, referring to fig. 2, the ecu electronic control unit 31 receives signals sent by a vehicle speed sensor and a torque sensor, converts the signals into corresponding electric signals and sends the corresponding electric signals to the control electromagnetic valve 13, and at the moment, the valve core of the control electromagnetic valve 13 moves rightwards, and the first oil inlet pipe 101 is respectively communicated with the second oil inlet pipe 105 and the right flow regulating oil pipe 103; the second oil inlet pipe 105 is communicated with a left power-assisted adjusting oil pipe 106 or a right power-assisted adjusting oil pipe 107, and the steering distributing valve 23 is communicated with the liquid storage tank 5 through a second oil return pipe 108;
the explanation will now be made taking, as an example, a left assist adjustment oil pipe 106 in which the second oil feed pipe 105 communicates with the steering distributing valve 23:
the motor 4 rotates to drive the fixed gear 121 to rotate, the fixed gear 121 drives the piston gear 122 to rotate, oil in the liquid storage tank 5 is pumped out, hydraulic oil sequentially flows into the control electromagnetic valve 13 through the oil inlet and the oil outlet of the gear pump 12 and the first oil inlet pipe 101, flows into the steering distribution valve 23 through the second oil inlet pipe 105, simultaneously, flows into the right flow regulating cylinder 113 through the right flow regulating oil pipe 103, pushes the floating piston 111 to overcome the pressure of the regulating spring 114 to move leftwards and reversely compress the regulating spring 114, thereby driving the piston gear 122 to move leftwards, gradually increasing the engagement length of the piston gear 122 and the fixed gear 121, and gradually increasing the flow of the hydraulic oil pumped by the gear pump 12 to the steering distribution valve 23 until the requirement of maximum power steering is met;
hydraulic oil flows into a left power-assisted adjusting cylinder 212 through a left power-assisted adjusting oil pipe 106, pushes a power-assisted piston 211 to move right, the power-assisted piston 211 pulls a steering pull rod 22 to provide power for steering of wheels, and oil in a right power-assisted adjusting cylinder 213 flows back into a steering distributing valve 23 through a right power-assisted adjusting oil pipe 107 and then flows back into the liquid storage tank 5 through a second oil return pipe 108. As the engagement length of the gear pump 12 is gradually increased, the hydraulic oil flow rate of the cylinder flowing into the side of the steering assist cylinder 21 is also gradually increased, and the assist force provided for the wheel steering is also gradually increased until the maximum assist force required for the low-speed running steering is provided, so that the driver can operate the steering wheel conveniently, and the portability of operation is realized.
If the pressure of the hydraulic oil flow exceeds the steering maximum power requirement, the pressure limiting valve 6 will be opened, and part of the hydraulic oil flows from the pressure limiting valve 6 into the second oil return pipe 108 and flows back into the reservoir 5.
When the vehicle runs in high-speed steering, referring to fig. 3, the ecu electronic control unit 31 receives signals sent by a vehicle speed sensor and a torque sensor and converts the signals into corresponding electric signals to be sent to the control electromagnetic valve 13, at the moment, the valve core of the control electromagnetic valve 13 moves leftwards, the first oil inlet pipe 101 is respectively communicated with the second oil inlet pipe 105 and the left flow regulating oil pipe 102, and the right flow regulating oil pipe 103 is communicated with the first oil return pipe 104 through a hollow oil cavity of the valve core of the control electromagnetic valve 13; the second oil inlet pipe 105 is communicated with a left power-assisted adjusting oil pipe 106 or a right power-assisted adjusting oil pipe 107, and the steering distributing valve 23 is communicated with the liquid storage tank 5 through a second oil return pipe 108;
the explanation will now be made taking, as an example, a left assist adjustment oil pipe 106 in which the second oil feed pipe 105 communicates with the steering distributing valve 23:
the motor 4 rotates to drive the fixed gear 121 to rotate, the fixed gear 121 drives the piston gear 122 to rotate, oil in the liquid storage tank 5 is pumped out, hydraulic oil sequentially flows into the control electromagnetic valve 13 through the oil inlet and the oil outlet of the gear pump 12 and the first oil inlet pipe 101, flows into the steering distributing valve 23 through the second oil inlet pipe 105, simultaneously, oil flows into the left flow regulating cylinder 112 through the left flow regulating oil pipe 102, the oil pressure and the elastic force of the regulating spring 114 jointly push the floating piston 111 to move rightwards, so that the piston gear 122 is driven to move rightwards, the meshing length of the piston gear 122 and the fixed gear 121 is gradually reduced, and the flow of the oil pumped by the gear pump 12 to the steering distributing valve 23 is gradually reduced; the oil in the right flow regulating cylinder 113 flows back to the liquid storage tank 5 through the right flow regulating oil pipe 103, the hollow oil cavity of the valve core of the control electromagnetic valve 13 and the first oil return pipe 104;
the hydraulic oil flowing into the steering distributing valve 23 flows into the left power-assisted adjusting cylinder 212 through the left power-assisted adjusting oil pipe 106 to push the power-assisted piston 211 to move right, at the moment, the meshing length of the gear pump 12 is gradually reduced, the hydraulic oil flow is also gradually reduced, the steering power is also gradually reduced, and at the moment, a driver needs larger steering operating force to realize road feel during high-speed driving; hydraulic oil in the right assist adjustment cylinder 213 flows back to the steering distribution valve 23 through the right assist adjustment oil pipe 107, and then flows back to the reservoir tank 5 through the second oil return pipe 108.
The foregoing description is only specific embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.
Claims (3)
1. An electronically controlled variable flow steering assist system, characterized by: the automatic steering device comprises a gear pump (12), a flow regulating unit (1), a steering regulating unit (2) and an EHPS electronic control unit (3), wherein the gear pump (12) is driven to rotate by a motor (4), the motor (4) is in communication connection with the EHPS electronic control unit (3), and an oil inlet of the gear pump (12) is connected with a liquid storage tank (5);
the flow regulating unit (1) comprises a flow regulating hydraulic cylinder (11), a floating piston (111) is arranged in the flow regulating hydraulic cylinder (11), and the floating piston (111) divides the flow regulating hydraulic cylinder (11) into a left flow regulating cylinder (112) and a right flow regulating cylinder (113); a piston gear (122) of the gear pump (12) is mounted on the floating piston (111); the control device controls the left and right movement of the floating piston (111), the control device is a control electromagnetic valve (13), the control electromagnetic valve (13) is in communication connection with the EHPS electronic control unit (3), the control electromagnetic valve (13) is a three-position five-way electromagnetic valve, the control electromagnetic valve (13) is respectively connected with the left flow regulating cylinder (112), the right flow regulating cylinder (113) and the liquid storage tank (5), and an oil outlet of the gear pump (12) is connected with the control electromagnetic valve (13);
the steering adjustment unit (2) comprises a steering cylinder (21), a steering rod (22) and a steering distributing valve (23); a power-assisted piston (211) is arranged in the steering power-assisted cylinder (21), the power-assisted piston (211) divides the steering power-assisted cylinder (21) into a left power-assisted adjusting cylinder (212) and a right power-assisted adjusting cylinder (213), a steering pull rod (22) is arranged in the steering power-assisted cylinder (21) and two ends of the steering pull rod extend out of the steering power-assisted cylinder (21) respectively to be connected with wheel knuckles, and the power-assisted piston (211) is fixedly connected with the steering pull rod (22); the steering distribution valve (23) is connected with the control electromagnetic valve (13), the steering distribution valve (23) is respectively connected with the left power-assisted adjusting cylinder (212) and the right power-assisted adjusting cylinder (213), and the steering distribution valve (23) is connected with the liquid storage tank (5);
the flow rate adjusting unit (1) adjusts the engagement length of a piston gear (122) and a fixed gear (121) of the gear pump (12), and adjusts the hydraulic oil flow rate entering the steering adjusting unit (2) to change the magnitude of steering assistance.
2. The electrically controlled variable flow steering assist system of claim 1 wherein: an adjusting spring (114) is arranged in the left flow adjusting cylinder (112), one end of the adjusting spring (114) is connected with the floating piston (111), and the other end of the adjusting spring is abutted against the inner wall of the left flow adjusting cylinder (112).
3. The electrically controlled variable flow steering assist system of claim 2 wherein: the steering distribution valve (23) is connected with the control electromagnetic valve (13) through an oil inlet pipe (105), the steering distribution valve (23) is connected with the liquid storage tank (5) through an oil return pipe (108), a bypass pipe (109) is arranged between the oil inlet pipe (105) and the oil return pipe (108), and a pressure limiting valve (6) is arranged on the bypass pipe (109).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199879.0A CN106882264B (en) | 2017-03-30 | 2017-03-30 | Electric control variable flow steering power assisting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710199879.0A CN106882264B (en) | 2017-03-30 | 2017-03-30 | Electric control variable flow steering power assisting system |
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| CN106882264A CN106882264A (en) | 2017-06-23 |
| CN106882264B true CN106882264B (en) | 2023-05-02 |
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| CN201710199879.0A Active CN106882264B (en) | 2017-03-30 | 2017-03-30 | Electric control variable flow steering power assisting system |
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| CN109955897B (en) * | 2019-03-11 | 2020-06-30 | 河南交通职业技术学院 | Hydraulic control system for intelligent mobile vehicle |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2066515U (en) * | 1990-04-15 | 1990-11-28 | 河北机电学院 | Energy conversion mechanism for variable gear type hydraulic system |
| CN2547911Y (en) * | 2002-04-01 | 2003-04-30 | 杨立忠 | Variable gear pump |
| CN101397031A (en) * | 2007-09-27 | 2009-04-01 | 比亚迪股份有限公司 | Hydraulic power-assisted steering system |
| CN101975161A (en) * | 2010-11-04 | 2011-02-16 | 奇瑞汽车股份有限公司 | Gear pump |
| CN102556148A (en) * | 2010-12-08 | 2012-07-11 | 江苏罡阳动力转向器厂 | Vehicular electrically-controlled hydraulic power steering system |
| CN102152809B (en) * | 2011-03-09 | 2014-04-09 | 大连瑞谷科技有限公司 | Structure for controlling mounting force of locating pin of automobile hydraulic power steering gear |
| CN202827719U (en) * | 2012-10-17 | 2013-03-27 | 王添辉 | Automotive electronic hydraguide |
| 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 |
| CN103552598B (en) * | 2013-10-31 | 2016-02-10 | 合肥正威液压科技有限公司 | Intelligent electric-controlled hydraulic power-assist steering system |
| CN103738395B (en) * | 2014-01-15 | 2016-08-31 | 厦门金龙旅行车有限公司 | A kind of integral new-energy passenger electric-controlled hydraulic power-assisted steering control system and control method |
| CN104742962B (en) * | 2015-03-30 | 2016-10-26 | 安徽德孚转向系统股份有限公司 | A kind of electric-controlled hydraulic power-assisted steering control method |
| CN206589954U (en) * | 2017-03-30 | 2017-10-27 | 福建船政交通职业学院 | A kind of automatically controlled variable-flow steering boost system |
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