CN109249986A - A kind of double source electric hydraulic power-assisted steering system and vehicle - Google Patents
A kind of double source electric hydraulic power-assisted steering system and vehicle Download PDFInfo
- Publication number
- CN109249986A CN109249986A CN201710574567.3A CN201710574567A CN109249986A CN 109249986 A CN109249986 A CN 109249986A CN 201710574567 A CN201710574567 A CN 201710574567A CN 109249986 A CN109249986 A CN 109249986A
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- Prior art keywords
- conversion module
- vehicle
- pressure side
- low
- battery
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Classifications
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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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Power Steering Mechanism (AREA)
Abstract
The present invention provides a kind of double source electric hydraulic power-assisted steering system and vehicle, double source electric hydraulic power-assisted steering system includes DC-AC conversion module, the steering motor of the exchange side connection vehicle of DC-AC conversion module, DC side connects high input voltage interface, and high input voltage interface is for connecting vehicle power battery；The controller is also connected with DC-dc conversion module, and the low-pressure side of DC-dc conversion module is equipped with the low pressure, input end mouth for connecting the battery of vehicle, and high-pressure side connects the DC side of the DC-AC conversion module；When the electric voltage exception of high input voltage interface, the low-pressure side of DC-dc conversion module takes electricity from low pressure input interface, the DC side of DC-AC conversion module is output to as steering motor power supply from high-pressure side after boosting, so that solution vehicle when power battery breaks down does not have the problem of power steering.
Description
Technical field
The invention belongs to technical field of vehicle control, and in particular to a kind of double source electric hydraulic power-assisted steering system and vehicle
?.
Background technique
Electric vehicle, either hybrid vehicle or pure electric vehicle, are designed with high-voltage energy storage unit and low pressure stores
Battery, high-voltage energy storage unit are mainly the power battery of vehicle, higher voltage are capable of providing, for driving vehicle；Low pressure stores
The voltage class that battery is capable of providing is relatively low, predominantly the various controllers of vehicle, car light, the power supply of the low-voltage devices such as instrument.
DC-AC conversion module and DC-dc conversion module are hybrid vehicle and the common device of pure electric vehicle, wherein
Direct current can be converted to alternating current by DC-AC conversion module, and DC-dc conversion module is equipped with high-pressure side and low pressure
Side can convert the voltage class of direct current.
Currently, the steering system of electric vehicle is mainly electric hydraulic power-assisted steering system, power source is mainly vehicle
The high-voltage electricity that power battery provides.But the stability of power battery can not show a candle to the traditional vehicles energy storage equipment such as fuel tank, air accumulator, no
Only to the requirement with higher such as waterproof, solar heat protection, resisting cold, and high failure rate, poor reliability.If vehicle is because of high-tension battery
System failure reason powers off suddenly, and vehicle is due also to inertia is sliding, but electric hydraulic power-assisted steering system is because of no high pressure
Input and it is out of service, for vehicle without power steering, driver cannot easily manipulate vehicle, cause vehicle to face and hand at any time
Interpreter thus wait security hidden troubles.
Summary of the invention
The purpose of the present invention is to provide a kind of double source electric hydraulic power-assisted steering system and vehicles, for solving in power
Vehicle is not due to having the problem of power steering when battery breaks down.
To achieve the above object, present invention provide the technical scheme that
A kind of double source electric hydraulic power-assisted steering system, including DC-AC conversion module, DC-AC conversion module
Exchange side connection vehicle steering motor, DC side connects high input voltage interface, and high input voltage interface is dynamic for connecting vehicle
Power battery；The controller is also connected with DC-dc conversion module, and the low-pressure side of DC-dc conversion module, which is equipped with, to be used for
The low pressure, input end mouth of the battery of vehicle is connected, high-pressure side connects the DC side of the DC-AC conversion module；
When the electric voltage exception of high input voltage interface, the low-pressure side of DC-dc conversion module takes from low pressure input interface
Electricity is output to the DC side of DC-AC conversion module after boosting from high-pressure side.
Further, the DC-AC conversion module and DC-dc conversion module are integrally disposed.
Further, the DC-dc conversion module is two-way DC-DC conversion module, when high input voltage interface
Voltage when not occurring abnormal, the high-pressure side of DC-dc conversion module takes electricity from the High voltage output interface, defeated to low pressure
Incoming interface exports low-voltage DC, for the battery charging for vehicle.
A kind of vehicle, including double source electric hydraulic power-assisted steering system；The double source electric hydraulic power-assisted steering system packet
DC-AC conversion module, the steering motor of the exchange side connection vehicle of DC-AC conversion module are included, DC side connects vehicle
Power battery；It is characterized in that, the controller is also connected with DC-dc conversion module, DC-dc conversion module
Low-pressure side connection vehicle battery, high-pressure side connects the DC side of the DC-AC conversion module；
When the power battery of vehicle occurs abnormal, the low-pressure side of DC-dc conversion module takes from the battery of vehicle
Electricity is output to the DC side of DC-AC conversion module after boosting from high-pressure side.
Further, the DC-AC conversion module and DC-dc conversion module are integrally disposed.
Further, the vehicle control unit controls of vehicle connect the DC-dc conversion module, control its Working mould
Formula.
Further, the DC-dc conversion module is two-way DC-DC conversion module, when the power electric of vehicle
When pond does not occur abnormal, the high-pressure side of DC-dc conversion module takes electricity from the power battery of vehicle, and low-pressure side is vehicle
Battery charging.
The beneficial effects of the present invention are: technical solution provided by the present invention, is additionally arranged on electric hydraulic power-assisted steering
DC-dc conversion module, when the power battery of vehicle breaks down, DC-dc conversion module can be from the low of vehicle
Pressure battery takes electricity, by low pressure electric boost and by powering for steering motor, so that solution exists after DC-AC conversion inversion
Vehicle does not have the problem of power steering when power battery breaks down.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of double source electric hydraulic power-assisted steering system in vehicle embodiments；
Fig. 2 is the schematic diagram of bidirectional DC-DC converter module in vehicle embodiments；
Equivalent circuit diagram when Fig. 3 is bidirectional DC-DC converter module decompression in vehicle embodiments；
Equivalent circuit diagram when Fig. 4 is bidirectional DC-DC converter module boosting in vehicle embodiments.
Specific embodiment
The purpose of the present invention is to provide a kind of double source electric hydraulic power-assisted steering system and vehicles, for solving in power
Vehicle is not due to having the problem of power steering when battery breaks down.
A kind of vehicle, including double source electric hydraulic power-assisted steering system；The double source electric hydraulic power-assisted steering system packet
DC-AC conversion module, the steering motor of the exchange side connection vehicle of DC-AC conversion module are included, DC side connects vehicle
Power battery；It is characterized in that, the controller is also connected with DC-dc conversion module, DC-dc conversion module
Low-pressure side connection vehicle battery, high-pressure side connects the DC side of the DC-AC conversion module；
When the power battery of vehicle occurs abnormal, the low-pressure side of DC-dc conversion module takes from the battery of vehicle
Electricity is output to the DC side of DC-AC conversion module after boosting from high-pressure side.
Embodiments of the present invention are described further with reference to the accompanying drawing.
Vehicle embodiments:
The present embodiment provides a kind of vehicle, which is the electric vehicle using double source electric hydraulic power-assisted steering system.
The structural schematic diagram of double source electric hydraulic power-assisted steering system is as shown in Figure 1, include integrally disposed DC-AC conversion module and double
To DC-DC module.The DC side of DC-AC conversion module passes through the power high voltage power supply of high voltage connector KM2 connection vehicle, i.e. vehicle
Power battery, exchange side connection vehicle steering motor；The low-pressure side of bidirectional DC-DC converter module passes through lv contactor
The low tension battery of KM1 connection vehicle, high-pressure side connect the DC side of DC-AC conversion module.The vehicle control unit controls of vehicle
Connect lv contactor KM1, high voltage connector KM2, DC-AC conversion module and bidirectional DC-DC converter module.
For the schematic diagram of bidirectional DC-DC converter module as shown in Fig. 2, wherein U2 is low-pressure side, U1 is that high-pressure side passes through control
Thyristor T1's and T2 cut-offs, and can increase the voltage of low-pressure side, or on high-tension side voltage is reduced.
Under normal circumstances, lv contactor KM1 coil when key is got to ACC grades by vehicle, in vehicle low-voltage electrical apparatus box
Must be electric, normally opened contact KM1 is attracted, and the low-pressure side of bidirectional DC-DC converter module is connect with low tension battery；Continue to get to key
At ON grades, high voltage connector KM2 coil obtains electric, normally opened contact KM2 actuation.
When the power battery of vehicle can work normally, the power battery of vehicle is the DC side of DC-AC conversion module
Power supply；The DC inverter inputted from DC side is alternating current by DC-AC conversion module, is exported from exchange side, is turning for vehicle
It powers to motor, steering motor drives Vehicular turn.If necessary to charge for the low tension battery of vehicle, then entire car controller control
Bidirectional DC-DC converter module processed, the high-voltage electricity of vehicle power battery, which is reduced to, to be the low tension of low tension battery charging.It is double
When being depressured to DC-DC conversion module, control thyristor T1 movement, T2 cut-off, its equivalent circuit is as shown in figure 3, two-way at this time
DC-DC conversion module works in Buck state, its on high-tension side voltage U1 is reduced to the voltage U2 of low-pressure side.
When the power battery of vehicle occurs abnormal, the low-pressure side of bidirectional DC-DC converter module takes electricity from low tension battery,
The low voltage of its low-pressure side is upgraded to high tension voltage by vehicle control unit controls bidirectional DC-DC converter module, converts mould for DC-AC
The DC side of block is powered；The DC inverter inputted from DC side is alternating current by DC-AC conversion module, is exported from exchange side,
It powers for the steering motor of vehicle, steering motor drives Vehicular turn.When bidirectional DC-DC converter module is boosted, thyristor is controlled
T2 movement, T1 cut-off, at this time its equivalent circuit as shown in figure 4, the work of bidirectional DC-DC converter module in Boost state, its is low
The voltage U2 boosting for pressing side is on high-tension side voltage U1.
Double source electric hydraulic power-assisted steering system embodiment:
It is electronic with the double source in above-mentioned vehicle embodiments the present embodiment provides a kind of double source electric hydraulic power-assisted steering system
Hydraulic power-assist steering system is identical, before be discussed in detail, seldom explain here.
Claims (7)
1. a kind of double source electric hydraulic power-assisted steering system, including DC-AC conversion module, DC-AC conversion module
The steering motor of side connection vehicle is exchanged, DC side connects high input voltage interface, and high input voltage interface is for connecting vehicle power
Battery；It is characterized in that, the controller is also connected with DC-dc conversion module, the low-pressure side of DC-dc conversion module
Low pressure, input end mouth equipped with the battery for connecting vehicle, high-pressure side connect the direct current of the DC-AC conversion module
Side；
When the electric voltage exception of high input voltage interface, the low-pressure side of DC-dc conversion module takes electricity from low pressure input interface, warp
Cross the DC side for being output to DC-AC conversion module after boosting from high-pressure side.
2. a kind of double source electric hydraulic power-assisted steering system according to claim 1, which is characterized in that the direct current-friendship
It flows conversion module and DC-dc conversion module is integrally disposed.
3. a kind of double source electric hydraulic power-assisted steering system according to claim 1, which is characterized in that the direct current-is straight
Stream conversion module is two-way DC-DC conversion module, and when the voltage of high input voltage interface does not occur abnormal, direct current-is straight
Stream conversion module high-pressure side take electricity from the High voltage output interface, to low pressure input interface export low-voltage DC, for for
The battery of vehicle charges.
4. a kind of vehicle, which is characterized in that including double source electric hydraulic power-assisted steering system；The double source electric hydaulic power-assisted turns
It include DC-AC conversion module, the steering motor of the exchange side connection vehicle of DC-AC conversion module, direct current to system
The power battery of side connection vehicle；It is characterized in that, the controller is also connected with DC-dc conversion module, DC-DC
The battery of the low-pressure side connection vehicle of conversion module, high-pressure side connects the DC side of the DC-AC conversion module；
When the power battery of vehicle occurs abnormal, the low-pressure side of DC-dc conversion module takes electricity from the battery of vehicle, warp
Cross the DC side for being output to DC-AC conversion module after boosting from high-pressure side.
5. a kind of vehicle according to claim 4, which is characterized in that the DC-AC conversion module and DC-DC
Conversion module is integrally disposed.
6. a kind of vehicle according to claim 4, which is characterized in that the vehicle control unit controls connection of vehicle is described straight
Stream-DC converting module, controls its operating mode.
7. a kind of vehicle according to claim 4, which is characterized in that the DC-dc conversion module is bidirectional, dc-
DC converting module, when the power battery of vehicle does not occur abnormal, the high-pressure side of DC-dc conversion module is from vehicle
Power battery takes electricity, and low-pressure side is that the battery of vehicle charges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574567.3A CN109249986A (en) | 2017-07-14 | 2017-07-14 | A kind of double source electric hydraulic power-assisted steering system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710574567.3A CN109249986A (en) | 2017-07-14 | 2017-07-14 | A kind of double source electric hydraulic power-assisted steering system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109249986A true CN109249986A (en) | 2019-01-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710574567.3A Pending CN109249986A (en) | 2017-07-14 | 2017-07-14 | A kind of double source electric hydraulic power-assisted steering system and vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112959A (en) * | 2019-05-09 | 2019-08-09 | 赣州时代新能源动力系统有限公司 | It is a kind of can two-way charging double source motor low voltage control system |
| CN112298340A (en) * | 2019-07-25 | 2021-02-02 | 郑州宇通客车股份有限公司 | Power-assisted steering system and vehicle |
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| US20150042159A1 (en) * | 2013-08-12 | 2015-02-12 | Hyundai Motor Company | Converter apparatus and method of electric vehicle |
| WO2016015329A1 (en) * | 2014-08-01 | 2016-02-04 | 冷再兴 | Dc-ac bi-directional power converter topology |
| CN105584520A (en) * | 2014-11-17 | 2016-05-18 | 比亚迪股份有限公司 | Steering power system of electric vehicle and control method for steering power system |
| CN106541830A (en) * | 2015-09-21 | 2017-03-29 | 比亚迪股份有限公司 | The steering control system and method for electric automobile |
| CN207466761U (en) * | 2017-07-14 | 2018-06-08 | 郑州宇通客车股份有限公司 | Double source electric hydraulic power-assisted steering system and vehicle |
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2017
- 2017-07-14 CN CN201710574567.3A patent/CN109249986A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150042159A1 (en) * | 2013-08-12 | 2015-02-12 | Hyundai Motor Company | Converter apparatus and method of electric vehicle |
| WO2016015329A1 (en) * | 2014-08-01 | 2016-02-04 | 冷再兴 | Dc-ac bi-directional power converter topology |
| CN105584520A (en) * | 2014-11-17 | 2016-05-18 | 比亚迪股份有限公司 | Steering power system of electric vehicle and control method for steering power system |
| CN106541830A (en) * | 2015-09-21 | 2017-03-29 | 比亚迪股份有限公司 | The steering control system and method for electric automobile |
| CN207466761U (en) * | 2017-07-14 | 2018-06-08 | 郑州宇通客车股份有限公司 | Double source electric hydraulic power-assisted steering system and vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110112959A (en) * | 2019-05-09 | 2019-08-09 | 赣州时代新能源动力系统有限公司 | It is a kind of can two-way charging double source motor low voltage control system |
| CN112298340A (en) * | 2019-07-25 | 2021-02-02 | 郑州宇通客车股份有限公司 | Power-assisted steering system and vehicle |
| CN112298340B (en) * | 2019-07-25 | 2021-11-26 | 郑州宇通客车股份有限公司 | Power-assisted steering system and vehicle |
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