CN205524208U - Electronic round of hydraulic pressure of drive -by -wire for car parking braking system of all wheel steering - Google Patents
Electronic round of hydraulic pressure of drive -by -wire for car parking braking system of all wheel steering Download PDFInfo
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- CN205524208U CN205524208U CN201620306518.2U CN201620306518U CN205524208U CN 205524208 U CN205524208 U CN 205524208U CN 201620306518 U CN201620306518 U CN 201620306518U CN 205524208 U CN205524208 U CN 205524208U
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Abstract
The utility model discloses an electronic round of hydraulic pressure of drive -by -wire for car parking braking system of all wheel steering, consecutive through the pipeline including electronic hydraulic pump (2), energy storage ware (4) and relief pressure valve (5), relief pressure valve (5) link to each other with parking braking valve (6), manual parking valve (7) respectively through the pipeline, then parking braking valve (6), manual parking valve (7) are continuous with driving / parking diverter valve (10) respectively through the pipeline, driving / parking diverter valve (10) are continuous with vehicle wheel brake (18) of front and back wheel respectively through the pipeline, this system includes still that parking braking switch (8) and the automatically controlled unit of parking braking (9) link to each other, the automatically controlled unit of parking braking (9) is used for acquisition sensor information and each electronic executive component of control. The utility model discloses a drive -by -wire hydraulic pressure parking braking scheme adapts to the characteristics that the wheel independently turned to, adopt pressurization, pressurize and the pressure release of drive -by -wire electromagnetic hydraulic valve control parking pressure, the response rapidly, parking braking hydraulic pressure force is produced by electronic hydraulic pump cooperation energy storage ware and air -vent valve, and brake force can be adjusted in a flexible way, the utility model discloses system can integrate ABS and ESP function.
Description
Technical field
This utility model relates to electric automobile hydraulic parking brake field, specifically a kind of all-wheel steering electric wheel truck use, electrohydraulic units provide the line traffic control hydraulic parking braking system of parking braking power.
Background technology
In order to enable the vehicle to be parked in safely on tilted road surface by means of parking brake, holding brake device is required to the parking braking power enough by the wheel on an axletree or whole wheel offer.In order to make vehicle brake can not only use as running brake, and can use as parking brake, holding brake device needs to take into account the service brake of vehicle brake and parking braking.
The each wheel of all-wheel steering electric wheel truck can independent steering and driving, there is good dynamic control performance, be a focus of following Development of Electric Vehicles.Due to each of which wheel all can independent steering, the holding brake device for orthodox car cannot adapt to the feature of whole wheel independent steering, the most applicable.
Utility model content
The purpose of this utility model is the deficiency overcoming prior art to exist, it is provided that a kind of all-wheel steering electric wheel truck line traffic control hydraulic parking braking system.
Operation principle of the present utility model is: utilizes electric hydraulic pump to coordinate accumulator to produce hydraulic brake pressure, provides parking hydraulic coupling to brake after pressure regulation.When carrying out parking braking, open park brake switch, parking braking ECU controls traveling/parking switching Vavle switching to parked state, braking valve for vehicle works in high-pressure side and parking hydraulic coupling is introduced four wheel drags, after setting up parking pressure, braking valve for vehicle works in middle position, and each pipeline is all closed, and pressure keeps.During parking, parking braking loine pressure is monitored by parking pressure transducer, maintains parking braking pressure in set point.
This utility model one all-wheel steering electric wheel truck line traffic control hydraulic parking braking system, it is sequentially connected by pipeline including electric hydraulic pump 2, accumulator 4 and air relief valve 5, air relief valve 5 is connected with braking valve for vehicle 6, manual parking valve 7 respectively by pipeline, and braking valve for vehicle 6, manual parking valve 7 are connected with traveling/parking switching valve 10 respectively by pipeline then；Traveling/parking switching valve 10 is connected with the wheel drag 18 of front and back wheel respectively by pipeline；
This system also includes that park brake switch 8 is connected with parking braking ECU 9, and described parking braking ECU 9 is used for gathering sensor information and controlling each electric executing part.
Described electric hydraulic pump 2, braking valve for vehicle 6, manual parking valve 7 are connected with brake fluid fuel tank respectively.
It is provided with the first pressure transducer 11 on pipeline between described accumulator 4 and air relief valve 5, is used for monitoring energy storage pressure, maintain Braking system pressure in the scope of application.
It is provided with the first bypass valve 14 and the second pressure transducer 12 on pipeline between described traveling/parking switching valve 10 and a road wheel drag 18；It is provided with the second bypass valve 15 and the 3rd pressure transducer 13 on pipeline between described traveling/parking switching valve 10 and another road wheel drag 18；Second pressure transducer 12 and the 3rd pressure transducer 13 are for monitoring wheel brake pressure, and during maintaining parking, brake pressure is in the scope of application.
Described braking valve for vehicle 6 is three electirc controlling hydraulic reversing valves, and middle position keeps for parking braking hydraulic line pressure, and other two position communicates with pressure piping and hydraulic pressure bleed-off circuit respectively, for producing the release of parking braking and parking braking.
Described bypass valve 14,15 is dual circuit arranged crosswise branch road stop valve.
Described manual parking valve 7, under malfunction, emergent parking braking.
Compared with prior art, the beneficial effects of the utility model are: this utility model uses line traffic control hydraulic parking braking scheme, adapt to the feature of wheel independent steering；Using line traffic control electromagnetic hydraulic valve to control the pressurization of parking pressure, pressurize and pressure release, response is rapidly；Parking braking hydraulic coupling accumulator and pressure regulator valve with electric hydraulic pump produce, and brake force can be adjusted flexibly；By using hydraulic accumulator can reduce the usage frequency of electric hydraulic pump, beneficially battery power supply system is energy-conservation；Hydraulic system is by switching Vavle switching service brake and parking braking, and two systems work alone；Using dual circuit arranged crosswise, reliability is high；This utility model system can be with integrated ABS and ESP function.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is workflow diagram of the present utility model.
In figure, 1 is brake fluid fuel tank, and 2 is electric hydraulic pump, 3 is check valve, and 4 is accumulator, and 5 is air relief valve, 6 is braking valve for vehicle, and 7 is manual parking valve, and 8 is park brake switch, 9 is parking braking ECU, and 10 switch valve for traveling/parking, and 11,12,13 is first, second, third pressure transducer, 14,15 is first, second bypass valve, 16 is normally-on two-position two-way electromagnetic valve, and 17 is normally closed two-position two-way solenoid valve, and 18 is wheel drag.
Detailed description of the invention
Below by embodiment, and the utility model is described in further detail to combine accompanying drawing.
As it is shown in figure 1, a kind of all-wheel steering electric wheel truck line traffic control hydraulic parking braking system, including:
Electric hydraulic pump 2, accumulator 4, air relief valve 5, produce the hydraulic pressure for parking braking；
Braking valve for vehicle 6, manual parking valve 7, traveling/parking switching valve 10, for being controlled parking hydraulic circuit；
Park brake switch 8, pressure transducer 11,12,13, monitor for line traffic control hydraulic parking device Working mode set and system pressure；
Parking braking ECU (ECU) 9, for sensor information collection and the control of electric execution element of parking braking system.
By using hydraulic accumulator 4 to reduce the usage frequency of electric hydraulic pump 2, it is beneficial to the energy-conservation of battery power supply system.
By using adjustable pressure-reducing valve 5 to regulate parking braking power in the scope of application.
Braking valve for vehicle 6, by wheel drag pressurization, pressurize and pressure release, carries out parking braking and releases parking braking.
Described braking valve for vehicle 6 is three electirc controlling hydraulic reversing valves, and middle position keeps for parking braking hydraulic line pressure, and other two position communicates with pressure piping and hydraulic pressure bleed-off circuit respectively, for producing the release of parking braking and parking braking.
Manual parking valve 7, under malfunction, emergent parking braking.
Traveling/parking switching valve 10, is used for switching brakes to parking mode of operation；
Park brake switch 8, uses maintenance switch, is used for starting parking or releasing parking.
Described bypass valve 14,15 is dual circuit arranged crosswise branch road stop valve, improves system reliability.
This utility model parking braking system can ensure the function of service braking system, particularly anti-lock braking system ABS and electronics vehicle body stabilising arrangement ESP.
As in figure 2 it is shown, be the workflow of parking braking.The connection when driver carries out parking of described park brake switch 8, after parking braking ECU 9 receives park brake switch 8 parking instruction, read pressure transducer 11 information, when pressure transducer 11 force value is less than preset range, drive electric hydraulic pump 2 to work, after pressure reaches preset upper limit value, stop electric hydraulic pump 2 work；Simultaneously, parking braking ECU 9 sends control signal to traveling/parking switching valve 10, drive and work in parking position to traveling/parking switching valve 10, then parking braking ECU 9 sends control signal to braking valve for vehicle 6, braking valve for vehicle 6 is driven to work in left position, all wheel drag 18 is connected with adjustable pressure-reducing valve 5 by pipeline, begins setting up pressure；In pressurization, parking braking ECU 9 receives pressure transducer 12,13 information, it may be judged whether normally build pressure；As normally set up parking pressure, parking braking ECU 9 sends control signal to braking valve for vehicle 6, drives braking valve for vehicle 6 to work in middle position, and whole wheel drag 18 pipeline lockings carry out pressurize.Hereafter, during parking, electric hydraulic pump 2 start and stop are entered to control by parking braking ECU 9 according to pressure transducer 11 signal, keep accumulator 4 pressure in normal range, according to pressure transducer 12,13 signal, wheel drag 18 pressure is monitored, drives when low pressure braking valve for vehicle 6 to work in left position and carry out ftercompction.If can not normally set up parking pressure during parking, after delay time to preset value, parking braking ECU 9 will carry out fault alarm.When driver releases parking, after parking braking ECU 9 detects that park brake switch 8 disconnects, control signal is sent to braking valve for vehicle 6, braking valve for vehicle 6 is driven to work in right position, all wheel drag 18 pipeline is connected with pressure relief pipe, and parking pressure discharges, and releases parking braking, then parking braking ECU 9 sends control signal to traveling/parking switching valve 10, drives and works in road location to traveling/parking switching valve 10.
Claims (4)
1. an all-wheel steering electric wheel truck line traffic control hydraulic parking braking system, it is characterised in that:
It is sequentially connected by pipeline including electric hydraulic pump (2), accumulator (4) and air relief valve (5), air relief valve (5)
Be connected with braking valve for vehicle (6), manual parking valve (7) respectively by pipeline, then braking valve for vehicle (6),
Manual parking valve (7) is connected with traveling/parking switching valve (10) respectively by pipeline；Traveling/parking switches
Valve (10) is connected with the wheel drag (18) of front and back wheel respectively by pipeline；
It is provided with the first pressure transducer on pipeline between described accumulator (4) and air relief valve (5)
(11), it is used for monitoring energy storage pressure, maintains Braking system pressure in the scope of application；
Arrange on pipeline between described traveling/parking switching valve (10) and a road wheel drag (18)
There are the first bypass valve (14) and the second pressure transducer (12)；Described traveling/parking switching valve (10) is with another
It is provided with the second bypass valve (15) and the 3rd pressure sensing on pipeline between No. one wheel drag (18)
Device (13)；Second pressure transducer (12) and the 3rd pressure transducer (13) are for monitoring wheel brake
Pressure, during maintaining parking, brake pressure is in the scope of application；
Described bypass valve (14,15) is dual circuit arranged crosswise branch road stop valve；
This system also includes that park brake switch (8) is connected with parking braking ECU (9), parking system
Dynamic ECU (9) switches valve with electric hydraulic pump (2), braking valve for vehicle (6), traveling/parking respectively
(10), the first pressure transducer (11), the second pressure transducer (12), the 3rd pressure transducer (13),
First bypass valve (14) and the second bypass valve (15) electrical connection, described parking braking ECU (9) is used for
Gather sensor information and control each electric executing part.
2. brakes as claimed in claim 1, it is characterised in that: described electric hydraulic pump (2),
Braking valve for vehicle (6), manual parking valve (7) are connected with brake fluid fuel tank respectively.
3. brakes as claimed in claim 1, it is characterised in that: described braking valve for vehicle (6)
Being three electirc controlling hydraulic reversing valves, middle position keeps for parking braking hydraulic line pressure, other two
Position communicates with pressure piping and hydraulic pressure bleed-off circuit respectively, is used for producing parking braking and parking braking
Release.
4. brakes as claimed in claim 1, it is characterised in that: described manual parking valve (7),
Under malfunction, emergent parking braking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620306518.2U CN205524208U (en) | 2016-04-13 | 2016-04-13 | Electronic round of hydraulic pressure of drive -by -wire for car parking braking system of all wheel steering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620306518.2U CN205524208U (en) | 2016-04-13 | 2016-04-13 | Electronic round of hydraulic pressure of drive -by -wire for car parking braking system of all wheel steering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205524208U true CN205524208U (en) | 2016-08-31 |
Family
ID=56790731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620306518.2U Withdrawn - After Issue CN205524208U (en) | 2016-04-13 | 2016-04-13 | Electronic round of hydraulic pressure of drive -by -wire for car parking braking system of all wheel steering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205524208U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105667477A (en) * | 2016-04-13 | 2016-06-15 | 武汉科技大学 | Wire driven hydraulic parking braking system for full-wheel steering electric-wheel car |
| CN107842531A (en) * | 2016-09-21 | 2018-03-27 | 比亚迪股份有限公司 | The hydraulic integrated control system and vehicle of vehicle |
| CN109591785A (en) * | 2018-11-30 | 2019-04-09 | 三汽车起重机械有限公司 | Automatic driving vehicle brake circuit system and automatic driving vehicle |
| CN110588617A (en) * | 2019-09-02 | 2019-12-20 | 中国煤炭科工集团太原研究院有限公司 | Control system for realizing driving and emergency parking braking functions of front wheels and rear wheels of explosion-proof vehicle |
-
2016
- 2016-04-13 CN CN201620306518.2U patent/CN205524208U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105667477A (en) * | 2016-04-13 | 2016-06-15 | 武汉科技大学 | Wire driven hydraulic parking braking system for full-wheel steering electric-wheel car |
| CN105667477B (en) * | 2016-04-13 | 2018-01-23 | 武汉科技大学 | A kind of all-wheel steering electric wheel truck line traffic control hydraulic parking braking system |
| CN107842531A (en) * | 2016-09-21 | 2018-03-27 | 比亚迪股份有限公司 | The hydraulic integrated control system and vehicle of vehicle |
| CN107842531B (en) * | 2016-09-21 | 2019-11-22 | 比亚迪股份有限公司 | The hydraulic integrated control system and vehicle of vehicle |
| CN109591785A (en) * | 2018-11-30 | 2019-04-09 | 三汽车起重机械有限公司 | Automatic driving vehicle brake circuit system and automatic driving vehicle |
| CN110588617A (en) * | 2019-09-02 | 2019-12-20 | 中国煤炭科工集团太原研究院有限公司 | Control system for realizing driving and emergency parking braking functions of front wheels and rear wheels of explosion-proof vehicle |
| CN110588617B (en) * | 2019-09-02 | 2021-11-12 | 中国煤炭科工集团太原研究院有限公司 | Control system for realizing driving and emergency parking braking functions of front wheels and rear wheels of explosion-proof vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160831 Effective date of abandoning: 20180123 |