CN109305219A - Electric hydraulic power-assisted steering system suitable for new-energy automobile - Google Patents
Electric hydraulic power-assisted steering system suitable for new-energy automobile Download PDFInfo
- Publication number
- CN109305219A CN109305219A CN201811129835.1A CN201811129835A CN109305219A CN 109305219 A CN109305219 A CN 109305219A CN 201811129835 A CN201811129835 A CN 201811129835A CN 109305219 A CN109305219 A CN 109305219A
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- Prior art keywords
- new
- mounting hole
- energy automobile
- steering system
- hydraulic power
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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
- B62D5/062—Details, component parts
- B62D5/064—Pump driven independently from vehicle engine, e.g. electric driven pump
-
- 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
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
Abstract
The invention discloses a kind of electric hydraulic power-assisted steering systems suitable for new-energy automobile, low-tension supply including electrohydraulic steering boost pump, for driving the electrohydraulic steering boost pump and for providing the high voltage power supply of electric energy to low-tension supply.The present invention is suitable for the electric hydraulic power-assisted steering system of new-energy automobile, electrohydraulic steering boost pump obtains electric energy from low-tension supply, it can ensure that power steering is unaffected when automobile high-voltage electricity gas system breaks down, and improves reliability, to also significantly increase safety concerns.
Description
Technical field
The invention belongs to wheel steering system technical fields, specifically, the present invention relates to one kind to be suitable for new-energy automobile
Electric hydraulic power-assisted steering system.
Background technique
It is different according to the source of electrohydraulic steering boost pump electric energy, it is divided into high-voltage electric hydraulic steering pump and low pressure
Electrohydraulic steering boost pump.High-voltage electric hydraulic steering pump electric energy is turned by single power battery through DC/AC converter
It is changed to alternating current, for driving high pressure steering assist motor to drive steering pump work, provides power steering；Low-pressure electric is hydraulic
Power assistance pump for steering obtains electric energy from DC/DC converter or A-battery, controls low pressure steering assist motor through motor driven systems
Steering pump work is driven, power steering is provided.
Currently, high-voltage electric hydraulic steering pump is powered by single power battery, once high-pressure system occurs suddenly
The failures such as power-off or power loss will result directly in power steering missing, influence normal vehicle operation, jeopardize passenger safety.Vapour
Main Engine factory is to improve to turn to safety, is started using double source electrohydraulic steering boost pump.That is electrohydraulic steering boost pump
Electric energy is provided by high-voltage electric system, when high-voltage electric system occurs abnormal, can be realized and be turned to by low-voltage electrical apparatus system power supply
Power-assisted will not disappear immediately.But this approach increases electrohydraulic steering boost pump weight and control difficulty, purchase cost increases.
Low-pressure electric hydraulic steering pump obtains electric energy by DC/DC converter or A-battery, will not be because of high-voltage electricity
The road system failure causes power steering to lack.But the existing low-pressure electric hydraulic steering pump in market has the disadvantage that one, electricity
Machine output torque is small, mostly uses ferrite permanent-magnet materials, and the power steering provided is smaller, using being confined to kart；Two, defeated
Outflow is small, and size is mostly steady state value, cannot be adjusted in real time, be caused according to the vehicle bodies such as speed, steering angular velocity signal
It is poor to turn to feel；Three, noise is larger, influences customer experience.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of fit
In the electric hydraulic power-assisted steering system of new-energy automobile, it is therefore an objective to improve reliability.
To achieve the goals above, the technical scheme adopted by the invention is as follows: the electric hydaulic power-assisted suitable for new-energy automobile
Steering system, including electrohydraulic steering boost pump, low-tension supply and use for driving the electrohydraulic steering boost pump
In the high voltage power supply to low-tension supply offer electric energy.
The low-tension supply is low tension battery.
The high voltage power supply is electrically connected with high-tension distribution box, and high-tension distribution box is electrically connected with DC/AC converter, and DC/AC turns
Parallel operation is electrically connected with the low-tension supply.
The high voltage power supply is the power battery pack on new-energy automobile.
The electrohydraulic steering boost pump includes assist motor and hydraulic pump, and the motor shaft of assist motor passes through shaft coupling
It is connect with the main shaft of hydraulic pump, the material of shaft coupling is plastics.
The shaft coupling has the first mounting hole for allowing the motor shaft of the assist motor to be inserted into and allows the hydraulic pump
Second mounting hole of main shaft insertion, the main shaft of the motor shaft and hydraulic pump of shaft coupling and assist motor are interference fit.
The shaft coupling has the first double wedge contacted with the motor shaft of the assist motor and the master with the hydraulic pump
Second double wedge of axis contact, the first double wedge is set on the inner wall of first mounting hole, and the second double wedge is set to described the
On the inner wall of two mounting holes.
First mounting hole is rectangular opening, and first double wedge is set in two opposite long sides of the first mounting hole
On wall surface；Second mounting hole is rectangular opening, and the length direction of the first mounting hole and the length direction of the second mounting hole mutually hang down
Directly, second double wedge is set on two opposite long side inner walls of the second mounting hole.
The electrohydraulic steering boost pump includes electric machine controller, and electric machine controller includes the first pcb board, the 2nd PCB
Plate and the heat sink for being bonded and be used to conduct heat to the assist motor with the second pcb board, the material of heat sink are aluminium.
Heat conductive silica gel is coated between the heat sink and second pcb board.
The present invention is suitable for the electric hydraulic power-assisted steering system of new-energy automobile, and electrohydraulic steering boost pump is from low tension
Source obtains electric energy, it can be ensured that and power steering is unaffected when automobile high-voltage electricity gas system breaks down, and improves reliability, thus
Also significantly increase safety concerns.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is the electrical structure schematic diagram for the electric hydraulic power-assisted steering system that the present invention is suitable for new-energy automobile；
Fig. 2 is the structural schematic diagram of electrohydraulic steering boost pump；
Fig. 3 is the perspective view of the explosion of electrohydraulic steering boost pump；
Fig. 4 is the structural schematic diagram of shaft coupling；
Fig. 5 is the structural schematic diagram of another angle of shaft coupling；
Fig. 6 is the structural schematic diagram of electric machine controller；
In the figure, it is marked as 1, oil can；2, hydraulic pump；3, assist motor；4, support；5, electric machine controller；501, the first PCB
Plate；502, the second pcb board；503, heat sink；6, shaft coupling；601, the first mounting hole；602, the second mounting hole；603, first is convex
Tooth；604, the second double wedge；605, long side inner wall；606, short side inner wall；607, long side inner wall；608, short side inner wall.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.
It should be noted that in embodiment disclosed below, " first " and " second " not representative structure and/or
Absolute differentiation relationship functionally, does not represent the successive sequence that executes yet, and merely for convenience of description.
As shown in Figure 1, the present invention provides a kind of electric hydraulic power-assisted steering system suitable for new-energy automobile, including electricity
Hydrodynamic pressure power assistance pump for steering, the low-tension supply for driving electrohydraulic steering boost pump and for low-tension supply provide electric energy
High voltage power supply.
Specifically, as shown in Figure 1, electrohydraulic steering boost pump is low-pressure electric hydraulic steering pump, by low pressure
Power supply is that assist motor 3 directly provides electric energy, and then assist motor 3 can drive 2 output hydraulic pressure of hydraulic pump oily, be Vehicular turn
Power-assisted is provided.Low-tension supply is low tension battery, and low tension battery is set on new-energy automobile, and high voltage power supply is new energy vapour
Power battery pack on vehicle.High voltage power supply is electrically connected with high-tension distribution box, and high-tension distribution box is to be electrically connected with DC/AC converter,
DC/AC converter is to be electrically connected with low-tension supply, and low-tension supply is to be electrically connected with assist motor 3, and high voltage power supply is for low
It charges when voltage source power shortage to low-tension supply.In entire vehicle electrical system, when main contactor is attracted, DC/DC converter will be high
The high-voltage electricity of voltage source is converted to 12V or 24V, and output works to vehicle electrical appliance, and in A-battery power shortage to low tension
Source charging, it is ensured that low-tension supply is stored with quantitative electric energy.Therefore, when vehicle high-pressure system exception, in the work of low-tension supply
Under, electric hydraulic power-assisted steering pumps sustainable operating certain time, realizes vehicle safety pulling over observing, it is ensured that driver and passenger people
Body safety.
It is same on the assist motor of double source electrohydraulic steering boost pump in existing double source electrohydraulic steering boost pump
When there are high-voltage windings and two kinds of low pressure winding, and high-voltage winding obtains electricity from power battery by high pressure DC/AC converter
Can, low pressure winding obtains electric energy from A-battery by low voltage DC/AC converter.The electrohydraulic steering boost pump of the application with
Double source electrohydraulic steering boost pump is compared, and the structure of the assist motor of use is simpler, without in addition using DC/AC converter
It is connect with power battery, so that significantly save the cost, mitigates complete vehicle weight.
As shown in Figures 2 and 3, electrohydraulic steering boost pump includes assist motor 3, hydraulic pump 2, oil can 1 and support 4,
Hydraulic pump 2 is gear pump, and oil can 1 and the setting of hydraulic pump 2 are on the carrier 4 and oil can 1 and hydraulic pump 2 are fixedly connected with support 4, liquid
Press pump 2 and the inside for being located at oil can 1, assist motor 3 is fixedly connected with support 4, support 4 be located at assist motor 3 and oil can 1 it
Between, assist motor 3 is for driving hydraulic pump 2 to be operated.Electrohydraulic steering boost pump is by assist motor 3, hydraulic pump 2 and oil
The fully-integrated one of components such as pot 1, small product size is small, occupies little space, and easy for installation, environmental suitability is more preferable, do not need into
Row special dust-proof, water-proofing treatment.
As shown in Figures 2 to 5, the motor shaft of assist motor 3 is connect by shaft coupling 6 with the main shaft of hydraulic pump 2, shaft coupling
6 for transmitting torque, and the motor shaft of assist motor 3 drives the main shaft of hydraulic pump 2 to be rotated by shaft coupling 6.Shaft coupling 6
Material is plastics, and the material of shaft coupling 6 is preferably PA6-GF60 composite material, this material strong, tensile strength with impact resistance
Greatly, the advantages that corrosion resistance is good, heat-resist, high mechanical strength, can extend product while guaranteeing mechanical mechanism intensity
Service life reduces noise, mitigates vibration, improves driver comfort.Shaft coupling 6 is cylindrical body, and support 4, which has, allows shaft coupling 6
The avoid holes passed through, shaft coupling 6 are sheathed on the motor shaft of assist motor 3 and the main shaft of hydraulic pump 2.Using the connection of plastic material
Axis device 6 can effectively reduce because of the main shaft of motor shaft and hydraulic pump 2 noise because of caused by concentricity difference.
As shown in Figures 2 to 5, shaft coupling 6 has the first mounting hole 601 for allowing the motor shaft of assist motor 3 to be inserted into and allows
Second mounting hole 602 of the main shaft insertion of hydraulic pump 2, shaft coupling 6 are with the motor shaft of assist motor 3 and the main shaft of hydraulic pump 2
Interference fit.First mounting hole 601 is rectangular opening, and the second mounting hole 602 is also rectangular opening, the length side of the first mounting hole 601
To perpendicular with the length direction of the second mounting hole 602.First mounting hole 601 is at the center of the first end face of shaft coupling 6
Start along the hole that the axis of shaft coupling 6 is formed towards the internal stretch of shaft coupling 6, the second mounting hole 602 is the of shaft coupling 6
Start the hole that the axis along shaft coupling 6 is formed towards the internal stretch of shaft coupling 6 at the center of biend, the first of shaft coupling 6
End face and second end face are the end face of opposite end in the axial direction of shaft coupling 6,602 phase of the first mounting hole 601 and the second mounting hole
(depth of the first mounting hole 601 and the second mounting hole 602 is the depth of connection and the first mounting hole 601 and the second mounting hole 602
Referring to size in the axial direction of shaft coupling 6) size is identical, the length scale phase of the first mounting hole 601 and the second mounting hole 602
Together, the width size of the first mounting hole 601 and the second mounting hole 602 is also identical.The insertion first of the motor shaft of assist motor 3 is pacified
Filling the part in hole 601 is flat structure, and the part in the second mounting hole of insertion 602 of the main shaft of hydraulic pump 2 is also flat knot
Structure.
As shown in Figures 2 to 5, preferably, shaft coupling 6 has first contacted with the motor shaft of assist motor 3 convex
Tooth 603 and the second double wedge 604 contacted with the main shaft of hydraulic pump 2, the first double wedge 603 are set to the inner wall of the first mounting hole 601
On face, and the first double wedge 603 is set on two opposite long side inner walls 605 of the first mounting hole 601, the first installation
There are four inner walls for the tool of hole 601, and four inner walls are respectively two long side inner walls 605 and two short side inner walls 606, long side
Inner wall 605 and short side inner wall 606 are the plane parallel with the axis of shaft coupling 6, and two long side inner walls 605 are opposite
The length direction of arrangement and two long side inner walls 605 is parallel, and two short side inner walls 606 are positioned opposite and two short sides
The length direction of inner wall 606 is parallel, the length direction of long side inner wall 605 and the length direction with short side inner wall 606
Perpendicular and long side inner wall 605 length is greater than the length of short side inner wall 606, and two short side inner walls 606 are located at two
Between the long side inner wall 605 and both ends of two short side inner walls 606 are respectively arc transition with one end of long side inner wall 605
Connection.Multiple first double wedges 603 are set on the long side inner wall 605 of first mounting hole 601, and two of the first mounting hole 601 are long
First double wedge 603 of equivalent amount is set on side inner wall 605, all the on the long side inner wall 605 of the first mounting hole 601
One double wedge 603 is sequentially arranged for the length direction along long side inner wall 605 and to be equally spaced, and the first double wedge 603 is edge and length
The perpendicular direction of side inner wall 605 is stretched out towards the side of long side inner wall 605, and the first double wedge 603 is used for and assist motor 3
Motor shaft appearance face contact, long side inner wall 605 with the appearance face contact of the motor shaft of assist motor 3, can not drop effectively
The low noise because of caused by machine shaft and pump shaft concentricity difference.First double wedge 603 has certain length, the first double wedge 603
Length direction it is parallel with the axis of shaft coupling 6, the depth size phase of the length of the first double wedge 603 and the first mounting hole 601
Together.Second double wedge 604 is set on the inner wall of the second mounting hole 602, and the second double wedge 604 is to be set to the second mounting hole 602
Two opposite long side inner walls 607 on, for the second mounting hole 602 tool there are four inner wall, four inner walls are respectively two
Long side inner wall 607 and two short side inner walls 608, long side inner wall 607 and short side inner wall 608 are the axis with shaft coupling 6
The parallel plane of line, two long side inner walls 607 are that length direction positioned opposite and two long side inner walls 607 is equal
Row, two short side inner walls 608 are that length direction positioned opposite and two short side inner walls 608 is parallel, long side inner wall
607 length direction and perpendicular with the length direction of short side inner wall 608 and long side inner wall 607 length are greater than in short side
The length of wall surface 608, two short side inner walls 608 are located between two long side inner walls 607 and two short side inner walls 608
Both ends are respectively that arc transition is connect with one end of long side inner wall 607, the length direction and long side inner wall of long side inner wall 607
The length direction in face 608 is spatially perpendicular, the length direction of short side inner wall 608 and the length side of short side inner wall 606
To spatially perpendicular.Multiple second double wedges 604, the second mounting hole are set on the long side inner wall 607 of the second mounting hole 602
Second double wedge 604 of equivalent amount, the long side inner wall of the second mounting hole 602 are set on 602 two long side inner walls 607
All second double wedges 604 on 607 are sequentially arranged for the length direction along long side inner wall 607 and to be equally spaced, and second is convex
Tooth 604 is to stretch out along the direction perpendicular with long side inner wall 607 towards the side of long side inner wall 607, and the second double wedge 604 is used
In the appearance face contact of the motor shaft with assist motor 3, the not outer surface with the motor shaft of assist motor 3 of long side inner wall 607
Contact can effectively reduce the noise because of caused by machine shaft and pump shaft concentricity difference.Second double wedge 604 has certain length
Degree, the length direction of the second double wedge 604 is parallel with the axis of shaft coupling 6, the length and the second mounting hole of the second double wedge 604
602 depth size is identical.
As shown in Figure 4 and Figure 5, in the present embodiment, setting three the on the long side inner wall 605 of the first mounting hole 601
Three the second double wedges 604 are arranged on the long side inner wall 607 of second mounting hole 602 for one double wedge 603.
Preferably, assist motor 3 is permanent magnet synchronous motor with high-power density, have power factor big, it is high-efficient, it bears
The features such as loading capability is strong.As shown in Fig. 2, Fig. 3 and Fig. 6, electrohydraulic steering boost pump includes electric machine controller 5, motor control
Device 5 is to be electrically connected with assist motor 3, and electric machine controller 5 is arranged between support 4 and assist motor 3, is had inside assist motor 3
There is the cavity for accommodating electric machine controller 5, electric machine controller 5 issues instruction, controls the revolving speed size of assist motor 3.Motor control
Device 5 includes the first pcb board 501 (circuit board), the second pcb board 502 (circuit board) and is bonded with the second pcb board 502 and is used to incite somebody to action
Heat is conducted to the heat sink 503 of assist motor 3, and the material of heat sink 503 is aluminium, and heat sink 503 simultaneously connects with assist motor 3
Touching conducts heat to assist motor 3 by heat sink 503, improves heat dissipation effect.First pcb board 501 and the second pcb board 502
Parallel, the first pcb board 501 is fixedly connected with the second pcb board 502, and the second pcb board 502 is located at the second pcb board 502 and heat dissipation
Between plate 503.
As shown in fig. 6, design method of the electric machine controller 5 using the superposition of two pieces of pcb boards, the first pcb board 501 is Metal Substrate
Copper-clad plate, be disposed on the first pcb board 501 master chip, IC chip, inductance, capacitor, resistance, small-power metal-oxide-semiconductor, diode and
The low electronic component of the calorific values such as triode is disposed with the biggish electricity of the calorific values such as high-power MOS tube on the second pcb board 502
Sub- component, the power of high-power MOS tube are greater than the power of small-power metal-oxide-semiconductor.Therefore in order to improve the heat dissipation of electric machine controller 5
Heat sink 503 is arranged in performance on the second pcb board 502, and the one side of heat sink 503 is fitted closely with the second pcb board 502, dissipates
The another side of hot plate 503 is bonded with assist motor 3, is coated with heat conductive silica gel between heat sink 503 and the second pcb board 502, can
It is conducted by heat sink 503 into assist motor 3 with the heat for effectively generating electronic component in the second pcb board 502, most
It is transferred heat in air by assist motor 3 afterwards, to reduce the temperature of product.Electric machine control system is using big current-carrying capacity
Mos pipe, is designed with the use of aluminium base power amplifier board, effectively increases system heat-conductive characteristic, High-current output is realized, so that it is guaranteed that low
Piezoelectricity hydrodynamic pressure power assistance pump for steering has relatively high power output, so that electro-hydraulic pump assembly is applicable in vehicle range more extensive.
The permanent magnet of assist motor 3 uses rare-earth permanent magnet material-neodymium iron boron, has magnetic hysteresis compared to common ferrite
The advantages that loop line is wider, coercivity is high, remanence strength is high.Remanence strength is high, generates big output torque and big function
Rate.The stator of assist motor 3 uses short distance distribution fractional-slot winding (4 pole, 6 slot structure), can effectively weaken slot ripples, electricity
Kinetic potential and armature reaction harmonics component reduce eddy-current loss, improve electric efficiency, save a large amount of electricity in the case of long-term use
Energy.The three-phase windings of assist motor 3 use triangle connection type, compared with star-like connection, in the identical situation of power of motor
Lower winding current is smaller, reduces heating loss.The revolving speed of assist motor 3 is higher, to ensure Nd-Fe-B permanent magnet in high speed rotation
When do not destroyed by centrifugal force, be provided with the protective jacket of high-intensitive non-magnetic conductive steel material in permanent magnet periphery, protective jacket is sheathed on forever
On magnet and protective jacket and permanent magnet are interference fit, apply certain precompression to permanent magnet.
The present invention be suitable for new-energy automobile electric hydraulic power-assisted steering system, be with the key signal of new-energy automobile,
Gearbox-gear signal and begin can signal be determine, determine electrohydraulic steering boost pump whether electrifying startup.According to anti-electronic
Gesture current waveform calculates actual speed and rotor-position by MCU (single-chip microcontroller), adjusts PWM duty cycle by pid algorithm,
According to the rotating speed of target that the tach signal of assist motor 3, angular velocity signal and other system signal COMPREHENSIVE CALCULATINGs go out, compare this mesh
Revolving speed and actual speed are marked, closed-loop control is carried out to assist motor 3, to realize the output stream to electrohydraulic steering boost pump
The control of amount.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (10)
1. being suitable for the electric hydraulic power-assisted steering system of new-energy automobile, including electrohydraulic steering boost pump, it is characterised in that:
It further include low-tension supply for driving the electrohydraulic steering boost pump and for providing the high pressure of electric energy to low-tension supply
Power supply.
2. the electric hydraulic power-assisted steering system according to claim 1 suitable for new-energy automobile, it is characterised in that: described
Low-tension supply is low tension battery.
3. the electric hydraulic power-assisted steering system according to claim 1 or 2 suitable for new-energy automobile, it is characterised in that:
The high voltage power supply is electrically connected with high-tension distribution box, and high-tension distribution box is electrically connected with DC/AC converter, DC/AC converter and institute
State low-tension supply electrical connection.
4. the electric hydraulic power-assisted steering system according to any one of claims 1 to 3 suitable for new-energy automobile, feature exist
In: the high voltage power supply is the power battery pack on new-energy automobile.
5. the electric hydraulic power-assisted steering system according to any one of claims 1 to 4 suitable for new-energy automobile, feature exist
In: the electrohydraulic steering boost pump includes assist motor and hydraulic pump, and the motor shaft of assist motor passes through shaft coupling and liquid
The main shaft of press pump connects, and the material of shaft coupling is plastics.
6. the electric hydraulic power-assisted steering system according to claim 5 suitable for new-energy automobile, it is characterised in that: described
Shaft coupling there is the first mounting hole for allowing the motor shaft of the assist motor to be inserted into and allow the main shaft of the hydraulic pump is inserted into the
The motor shaft of two mounting holes, shaft coupling and assist motor and the main shaft of hydraulic pump are interference fit.
7. the electric hydraulic power-assisted steering system according to claim 6 suitable for new-energy automobile, it is characterised in that: described
Shaft coupling has the first double wedge contacted with the motor shaft of the assist motor and contact with the main shaft of the hydraulic pump second
Double wedge, the first double wedge are set on the inner wall of first mounting hole, and the second double wedge is set to the interior of second mounting hole
On wall surface.
8. the electric hydraulic power-assisted steering system according to claim 7 suitable for new-energy automobile, it is characterised in that: described
First mounting hole is rectangular opening, and first double wedge is set on two opposite long side inner walls of the first mounting hole；It is described
Second mounting hole is rectangular opening, and the length direction of the first mounting hole and the length direction of the second mounting hole are perpendicular, described second
Double wedge is set on two opposite long side inner walls of the second mounting hole.
9. according to any electric hydraulic power-assisted steering system suitable for new-energy automobile of claim 5 to 8, feature exists
In: the electrohydraulic steering boost pump include electric machine controller, electric machine controller include the first pcb board, the second pcb board and with
The fitting of second pcb board and the heat sink for conducting heat to the assist motor, the material of heat sink are aluminium.
10. the electric hydraulic power-assisted steering system according to claim 9 suitable for new-energy automobile, it is characterised in that: institute
It states and is coated with heat conductive silica gel between heat sink and second pcb board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811129835.1A CN109305219A (en) | 2018-09-27 | 2018-09-27 | Electric hydraulic power-assisted steering system suitable for new-energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811129835.1A CN109305219A (en) | 2018-09-27 | 2018-09-27 | Electric hydraulic power-assisted steering system suitable for new-energy automobile |
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| CN109305219A true CN109305219A (en) | 2019-02-05 |
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| CN201811129835.1A Pending CN109305219A (en) | 2018-09-27 | 2018-09-27 | Electric hydraulic power-assisted steering system suitable for new-energy automobile |
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| CN103625544A (en) * | 2013-11-04 | 2014-03-12 | 北京理工大学 | Oil pump dual-motor drive device with electric-hydraulic power steering function |
| KR20160049594A (en) * | 2014-10-27 | 2016-05-10 | 현대모비스 주식회사 | Power transmission apparatus of motor for electro-hydraulic power steering |
| CN204659812U (en) * | 2015-03-18 | 2015-09-23 | 苏州舜唐新能源电控设备有限公司 | The electric hydaulic force aid system of new-energy automobile |
| CN105109546A (en) * | 2015-08-21 | 2015-12-02 | 郑州宇通客车股份有限公司 | Dual-energy-source electric hydraulic power steering system, control method and electric coach |
| CN107054457A (en) * | 2017-04-01 | 2017-08-18 | 厦门市福工动力技术有限公司 | A kind of control system and its control method of new-energy automobile hydraulic power-assisted steering |
| CN208715284U (en) * | 2018-09-27 | 2019-04-09 | 安徽德孚转向系统股份有限公司 | Electric hydraulic power-assisted steering system suitable for new-energy automobile |
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