CN111301519A - Anti-drop high-pressure steering auxiliary device - Google Patents
Anti-drop high-pressure steering auxiliary device Download PDFInfo
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- CN111301519A CN111301519A CN201911259624.4A CN201911259624A CN111301519A CN 111301519 A CN111301519 A CN 111301519A CN 201911259624 A CN201911259624 A CN 201911259624A CN 111301519 A CN111301519 A CN 111301519A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 15
- 238000004146 energy storage Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 62
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- B62D5/062—Details, component parts
- B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention relates to an anti-drop high-pressure steering auxiliary device, which comprises a rotating oil can, an electric steering pump, a steering gear, a steering transmission device, a steering wheel, an energy accumulator and a DCU controller, wherein the rotating oil can is connected with the steering transmission device; the energy accumulator is connected to a high-pressure oil pipe between the electric steering pump and the steering gear, and an air outlet of the energy accumulator is matched with the high-pressure oil pipe through a three-way joint and is respectively connected with the electric steering pump and the steering gear; a one-way valve is connected in series on a high-pressure oil pipe between an oil outlet of the electric steering pump and the three-way joint; a high-pressure pipeline between the air outlet of the energy accumulator and the three-way joint is connected with an electromagnetic valve; the electromagnetic valve is connected to a main CAN line of the DCU controller through an electromagnetic valve line; an electromagnetic regulating valve is connected on an oil return pipe between an oil return port of the steering gear and an oil return port of the rotating oil can; the electromagnetic regulating valve is connected to a main CAN line of the DCU controller through an electromagnetic regulating valve line. The invention has safe and reliable use and can ensure that the vehicle can be normally stopped after the electric steering pump is powered off.
Description
Technical Field
The invention relates to the technical field of high-pressure rotating pumps, in particular to an anti-dropping high-pressure steering auxiliary device.
Background
With the development of the new energy industry greatly promoted by the country and the implementation of the 'blue sky plan' for environmental protection, the yield of new energy automobiles is gradually improved, and the design quality problems of the new energy automobiles gradually emerge from the water surface.
The connection mode of more electric vehicle steering systems is that a power-driven oil pot → a power-driven pump → a steering booster → a power-driven oil pot, when a vehicle runs at present, high voltage power is cut off, high voltage components (particularly the power-driven pump) stop working when the vehicle runs at high speed, the phenomena of direction failure and direction return can occur, and the life safety of passengers in the whole vehicle is seriously threatened. When the rotary pump suddenly loses high voltage electricity during running and stops working, the phenomenon that the steering gear lacks oil pressure and the direction returns to the right direction during running is caused, the steering wheel is driven to rotate, the phenomenon of steering wheel beating is caused, steering is in a no-power-assisted state at the moment, the steering of a vehicle with a heavy front axle load is difficult at the moment, and a driver cannot control the running direction of the vehicle in an emergency.
For this situation, the following measures may be taken:
firstly, the power-driven rotary pump uses a dual-power-driven rotary pump; the low voltage can continue to operate after the high voltage is powered down; however, the price of the state rotating pump of the scheme is higher and is twice of the price of other rotating pumps, and a set of additional controller is added, so that the cost is too high;
secondly, a low-pressure rotating pump is used; after the high voltage of the whole vehicle is dropped, the storage battery can still provide the electric quantity for the rotating pump, so that the normal work can be ensured after the high voltage is dropped; however, the low-voltage motor in the scheme is large, the cost of the wire harness is high, and the low-voltage motor of a vehicle type with the length of more than 8 meters is not used at present;
thirdly, an energy storage device is added in the power steering system; an energy storage device is additionally arranged between the rotary pump and the steering gear to ensure that the rotary pump is supplied with short energy to the steering booster after power failure, so that the vehicle can be normally stopped.
The power steering system is feasible to increase the energy storage device, and has more practical significance especially for the vehicle type with the length of more than 8 meters. Therefore, how to add an energy storage device to a power steering system to realize that when the electric rotary pump stops working under high pressure, such as during high-speed running of a vehicle, a short amount of energy is supplied to a steering gear to ensure that the steering gear can be normally stopped is a technical problem to be solved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a high-voltage-drop-prevention steering auxiliary device which can ensure that energy can be supplied to a steering gear for a short time when an electric steering pump does not work after power failure so as to normally stop the steering gear.
The invention is realized by the following technical scheme:
the anti-drop high-pressure steering auxiliary device comprises a rotating oil can, an electric steering pump, a steering gear, a steering transmission device and a steering wheel; an oil inlet of the electric steering pump is connected to an oil outlet of the rotating oil can through a rotating pump oil inlet pipe, and an oil outlet of the electric steering pump is connected to the steering gear through a high-pressure oil pipe; an oil return port of the steering gear is connected to an oil return port of the rotating oil can through an oil return pipe; the steering transmission device is arranged at the upper end of the steering gear, and the steering wheel is arranged at the upper end of the steering transmission device; the anti-drop high-pressure steering auxiliary device further comprises an energy storage device and a DCU controller; the energy accumulator is connected to a high-pressure oil pipe between the electric steering pump and the steering gear, and an air outlet of the energy accumulator is matched with the high-pressure oil pipe through a three-way joint and is respectively connected with the electric steering pump and the steering gear; a one-way valve is also connected in series on a high-pressure oil pipe between the oil outlet of the electric steering pump and the three-way joint; a high-pressure pipeline between the air outlet of the energy accumulator and the three-way joint is also connected with an electromagnetic valve; the electromagnetic valve is connected to a main CAN line of the DCU controller through an electromagnetic valve line; an electromagnetic regulating valve is connected on an oil return pipe between an oil return port of the steering gear and an oil return port of the rotating oil can; and the electromagnetic regulating valve is connected to a main CAN line of the DCU controller through an electromagnetic regulating valve line.
The anti-drop high-pressure steering assist device, wherein: and a pressure sensor is further installed at the air outlet of the energy accumulator and is connected to a main CAN line of the DCU controller through a pressure sensor line.
The anti-drop high-pressure steering assist device, wherein: and a steering angle sensor is further installed at the connecting part of the steering transmission device and the steering gear, and the steering angle sensor is connected to a main CAN line of the DCU controller through an angle sensor line.
Has the advantages that:
the anti-drop high-pressure steering auxiliary device has simple and reasonable structural design, an energy accumulator and a DCU controller are additionally arranged between a rotary pump and a steering gear, an air outlet of the energy accumulator is respectively connected with an electric steering pump and the steering gear through a three-way joint and a high-pressure oil pipe, a one-way valve is connected on the high-pressure oil pipe between an oil outlet of the electric steering pump and the three-way joint in series, a high-pressure pipeline between the air outlet of the energy accumulator and the three-way joint is also connected with an electromagnetic valve, an electromagnetic regulating valve is connected on an oil return pipe between an oil return port of the steering gear and an oil return port of a rotary oil can, the DCU controller controls the opening and closing of the electromagnetic valve and the electromagnetic regulating valve, so that the flow of hydraulic oil is controlled by the combination of control valves and the DCU, the anti-drop high-pressure steering auxiliary device is operated under each working state of a vehicle, and the electric steering pump, the steering gear is supplied with transient energy, so that the vehicle can be normally stopped, the problems that the electric rotary pump is dropped at high pressure to stop working when the vehicle runs at high speed in the prior art, the direction is out of order and the direction returns to the right are effectively solved, potential safety hazards possibly occurring in the running process of the vehicle are eliminated, and the safety in the running process of the vehicle is effectively guaranteed.
The anti-drop high-pressure steering auxiliary device can be applied to vehicles and all products applying high-pressure rotating pumps.
Drawings
Fig. 1 is a schematic structural view of the anti-drop high pressure steering assist device of the present invention.
Detailed Description
As shown in fig. 1, the anti-drop high-pressure steering auxiliary device of the invention comprises a rotating oil can 1, an electric steering pump 2, an energy accumulator 3, a steering gear 4, a steering transmission device 5, a steering wheel 6, a DCU controller 7, an electromagnetic regulating valve 8 and a steering angle sensor 9.
The rotating oil pot 1 is provided with an oil inlet and an oil return port.
An oil inlet of the electric steering pump 2 is connected to an oil outlet of the rotating oil pot 1 through an oil inlet pipe of the rotating oil pot, an oil outlet of the electric steering pump 2 is connected with a check valve 21 in series through a high-pressure oil pipe, and the check valve 21 is connected to the steering gear box 4 through the high-pressure oil pipe.
The energy accumulator 3 is connected to a high-pressure oil pipe between the one-way valve 21 of the electric steering pump 2 and the steering gear 4, an oil outlet of the energy accumulator 3 is connected with a three-way joint 31 through the high-pressure oil pipe and is matched with the high-pressure oil pipe through the three-way joint 31 to be respectively connected with the one-way valve 21 of the electric steering pump 2 and the steering gear 4; wherein, a pressure sensor 32 is further installed at the oil outlet of the energy storage 3, and the pressure sensor 32 is connected to a main CAN line of the DCU controller 7 through a pressure sensor line; meanwhile, a high-pressure pipeline between the oil outlet of the energy accumulator 3 and the three-way joint 31 is also connected with an electromagnetic valve 33; the solenoid valve 33 is connected to the main CAN line of the DCU controller 7 by a solenoid valve line.
The oil return port of the steering gear 4 is connected to the oil return port of the rotating oil can 1 through an oil return pipe; wherein, an electromagnetic regulating valve 8 is connected on an oil return pipe between an oil return port of the steering gear 4 and an oil return port of the rotating oil can 1; the solenoid valve 8 is connected to a main CAN line of the DCU controller 7 through a solenoid valve line.
The steering transmission device 5 is arranged at the upper end of the steering gear 4, a steering angle sensor 9 is further arranged at the connecting part of the steering transmission device 5 and the steering gear 4, and the steering angle sensor 9 is connected to a main CAN line of the DCU controller 7 through an angle sensor line.
The steering wheel 6 is mounted on the upper end of the steering gear 5.
The working process of the anti-drop high-pressure steering auxiliary device of the invention is further explained by combining the conditions of the vehicle in each working state:
(1) normal driving state of vehicle
The power-assisted oil is provided for the steering gear 4 to achieve the power-assisted effect, and the power-assisted oil of the steering gear 4 flows into the power-assisted oil pot 1 through the electromagnetic regulating valve 8 (in an open state).
(2) State of stored energy
When the vehicle normally runs, the anti-drop high-pressure steering auxiliary device does not participate in working, only when the pressure sensor 32 monitors that the pressure of the energy storage device 3 is lower than a required value, the electromagnetic valve 33 is opened, meanwhile, the electromagnetic regulating valve 8 is closed to store the pressure for the energy storage device 3, when the pressure reaches the required value, the electromagnetic valve 33 is closed, the electromagnetic regulating valve 8 is opened, and the normal working state is recovered.
(3) System operating state
When the high pressure of the vehicle is in fault and the high pressure is interrupted, the DCU controller 7 transmits a signal to the electromagnetic valve 33, the electromagnetic valve 33 is opened, if the steering angle sensor 9 is in a 0-scale state (a direction straight-going state), the electromagnetic regulating valve 8 is closed, and the vehicle is in a deceleration state at the same time; when a vehicle turns, the steering wheel 6 is rotated, the steering wheel 6 drives the steering transmission device 5, the steering transmission device 5 rotates, the angle of the steering angle sensor 9 changes, the steering angle sensor 9 transmits a steering angle signal to the DCU controller 7, different angle changes correspond to different voltage signals, the DCU controller 7 feeds a corresponding result back to the electromagnetic regulating valve 8, the electromagnetic regulating valve 8 makes opening states of different degrees according to the change of the input result, and the steering system is guaranteed to normally work; the oil return amount is minimized to meet the requirement, and the effective working time of the system is prolonged.
If the steering angle sensor 9 is in a scaled state, the electromagnetic regulating valve 8 is opened to a corresponding opening degree according to a value fed back to the DCU controller 7 by the steering angle sensor 9.
The invention has simple and reasonable structural design, can solve the problems of direction failure and direction return caused by the loss of steering power assistance when a vehicle runs in the prior art, ensures that the power of a rotary pump is temporarily supplied to a steering booster after power failure, and ensures that the vehicle can normally stop.
The following explains the effect calculation of the anti-drop high-voltage steering auxiliary device in practical application, taking an electric bus of 8 meters as an example:
the maximum required pressure of the steering gear 4 is 13Mpa, and the flow rate is 20L/min; when a vehicle is in a driving process and a vehicle abnormal condition that the whole vehicle needs to actively break B-level high-voltage electricity is generated, a steering system is kept in a power-assisted state or at least kept in a power-assisted steering state for 30s and then the B-level electricity is broken when the vehicle speed is more than 5 km/h, so that high-voltage oil for 30s can be provided after an electric steering pump 2 is powered off for meeting the requirement of stopping the whole vehicle, and in order to ensure that the vehicle can still run to the normal stop after a fault, the condition needs to ensure that a steering wheel 6 can rotate for 2 times at a limit position after power failure, and the steering force after two times of rotation is less than 350N; the volume of the steering gear 4, i.e., the number of turns, is equal to the amount of oil supplied by the energy storage device during operation, so that the volume of the energy storage device 3 needs to be greater than the amount of oil supplied by the energy storage device during operation.
The above embodiments are merely illustrative, and the present invention is not limited thereto, and the anti-dropping high pressure steering assist device of the present invention can be applied to any product using a high pressure rotary pump.
Claims (3)
1. An anti-drop high-pressure steering auxiliary device comprises a rotating oil can, an electric steering pump, a steering gear, a steering transmission device and a steering wheel; an oil inlet of the electric steering pump is connected to an oil outlet of the rotating oil can through a rotating pump oil inlet pipe, and an oil outlet of the electric steering pump is connected to the steering gear through a high-pressure oil pipe; an oil return port of the steering gear is connected to an oil return port of the rotating oil can through an oil return pipe; the steering transmission device is arranged at the upper end of the steering gear, and the steering wheel is arranged at the upper end of the steering transmission device; the method is characterized in that: the anti-drop high-pressure steering auxiliary device further comprises an energy storage device and a DCU controller;
the energy accumulator is connected to a high-pressure oil pipe between the electric steering pump and the steering gear, and an air outlet of the energy accumulator is matched with the high-pressure oil pipe through a three-way joint and is respectively connected with the electric steering pump and the steering gear; a one-way valve is also connected in series on a high-pressure oil pipe between the oil outlet of the electric steering pump and the three-way joint; a high-pressure pipeline between the air outlet of the energy accumulator and the three-way joint is also connected with an electromagnetic valve; the electromagnetic valve is connected to a main CAN line of the DCU controller through an electromagnetic valve line;
an electromagnetic regulating valve is connected on an oil return pipe between an oil return port of the steering gear and an oil return port of the rotating oil can; and the electromagnetic regulating valve is connected to a main CAN line of the DCU controller through an electromagnetic regulating valve line.
2. The drop-proof high-pressure steering assist device according to claim 1, wherein: and a pressure sensor is further installed at the air outlet of the energy accumulator and is connected to a main CAN line of the DCU controller through a pressure sensor line.
3. The drop-proof high-pressure steering assist device according to claim 1, wherein: and a steering angle sensor is further installed at the connecting part of the steering transmission device and the steering gear, and the steering angle sensor is connected to a main CAN line of the DCU controller through an angle sensor line.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019218402591 | 2019-10-30 | ||
| CN201921840259 | 2019-10-30 |
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| Publication Number | Publication Date |
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| CN111301519A true CN111301519A (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911259624.4A Pending CN111301519A (en) | 2019-10-30 | 2019-12-10 | Anti-drop high-pressure steering auxiliary device |
| CN201922200966.0U Active CN211494217U (en) | 2019-10-30 | 2019-12-10 | Anti-drop high-pressure steering auxiliary device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922200966.0U Active CN211494217U (en) | 2019-10-30 | 2019-12-10 | Anti-drop high-pressure steering auxiliary device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111301519A (en) * | 2019-10-30 | 2020-06-19 | 东风特汽(十堰)客车有限公司 | Anti-drop high-pressure steering auxiliary device |
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| CN106541987A (en) * | 2015-09-17 | 2017-03-29 | 东风特汽（十堰）专用车有限公司 | A kind of electric hydraulic power-assisted steering system |
| CN107235074A (en) * | 2017-05-09 | 2017-10-10 | 深圳市沃特玛电池有限公司 | Electric motor coach steering boost system |
| CN206719318U (en) * | 2017-04-18 | 2017-12-08 | 清华大学 | A kind of electric hydraulic power-assisted steering system that there is power-off to keep assist function in short-term |
| CN107891910A (en) * | 2017-12-19 | 2018-04-10 | 石家庄旭特压缩机有限公司十堰分公司 | A kind of automobile-used steering boost system of electric |
| CN107985397A (en) * | 2017-12-27 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of emergency vehicles steering, new-energy automobile and forward method |
| CN211494217U (en) * | 2019-10-30 | 2020-09-15 | 东风特汽(十堰)客车有限公司 | Anti-drop high-pressure steering auxiliary device |
-
2019
- 2019-12-10 CN CN201911259624.4A patent/CN111301519A/en active Pending
- 2019-12-10 CN CN201922200966.0U patent/CN211494217U/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11180332A (en) * | 1997-12-18 | 1999-07-06 | Kayaba Ind Co Ltd | Motor-driven, oil-hydraulic power steering device |
| CN202624354U (en) * | 2012-05-30 | 2012-12-26 | 潍柴动力股份有限公司 | Hydraulic power steering system of hybrid vehicle |
| CN203158069U (en) * | 2013-04-08 | 2013-08-28 | 郑州宇通客车股份有限公司 | New energy vehicle and hybrid driving electric-hydraulic power-assisted steering system thereof |
| CN103523080A (en) * | 2013-10-23 | 2014-01-22 | 东风商用车有限公司 | Double-power power-assisted steering system of hybrid electric vehicle |
| CN203651883U (en) * | 2013-10-28 | 2014-06-18 | 龙工(上海)机械制造有限公司 | Wheel-type loader hydraulic system with emergency steering function |
| CN204605931U (en) * | 2015-03-04 | 2015-09-02 | 淮安信息职业技术学院 | A kind of emergent electrobus electric hydraulic power-assisted steering system |
| CN106541987A (en) * | 2015-09-17 | 2017-03-29 | 东风特汽（十堰）专用车有限公司 | A kind of electric hydraulic power-assisted steering system |
| CN206719318U (en) * | 2017-04-18 | 2017-12-08 | 清华大学 | A kind of electric hydraulic power-assisted steering system that there is power-off to keep assist function in short-term |
| CN107235074A (en) * | 2017-05-09 | 2017-10-10 | 深圳市沃特玛电池有限公司 | Electric motor coach steering boost system |
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| CN107985397A (en) * | 2017-12-27 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of emergency vehicles steering, new-energy automobile and forward method |
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| CN211494217U (en) | 2020-09-15 |
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