CN208842388U - A kind of automatic breaking system for automatic driving car - Google Patents
A kind of automatic breaking system for automatic driving car Download PDFInfo
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- CN208842388U CN208842388U CN201821117923.5U CN201821117923U CN208842388U CN 208842388 U CN208842388 U CN 208842388U CN 201821117923 U CN201821117923 U CN 201821117923U CN 208842388 U CN208842388 U CN 208842388U
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Abstract
The utility model belongs to Pneumatic braking system, specifically a kind of automatic breaking system for automatic driving car.The braking system includes electric air compressor, automatically controlled air conditioner unit, electronic parking memory valve, preceding air tank, rear air tank, pressure sensor, electric control braking solenoid valve, spring brake cylinder, anti-lock solenoid valve, urgent exhaust solenoid valve, manual exhaust valve, wheel speed sensors, brake monitor and preceding brake chamber；The utility model is a kind of vehicle for non-driver operating mechanism, and the directionless disk of the vehicle, braking and gas pedal, variable-speed manipulator etc. meet the automatic breaking system for automatic driving car of the actual demand of braking system control；The system is able to achieve automatic braking function under non-driver input condition, optimization system structure, reduction development cost it is insufficient can to solve existing automatic breaking system to greatest extent.
Description
Technical field
The utility model belongs to Pneumatic braking system, specifically a kind of automatic braking system for automatic driving car
System.
Background technique
With the continuous improvement of vehicle technology level, unmanned technology in automotive field using more and more extensive.
For commercial vehicle, unmanned technology can not only mitigate driver's driving fatigue, improve driving safety, and can be effectively excellent
Change vehicle motor or motor load, achievees the effect that energy-saving and emission-reduction.
When the vehicle front in traveling encounters barrier etc., driver to vehicle can slow down according to traffic information to stop
Vehicle or lane change avoiding operation；And automatic driving vehicle, it needs to perceive road conditions letter according to realizations such as vehicle itself camera and radars
Function is ceased, and automatic braking and/or auto-steering are applied to vehicle, is realized to pro-active intervention, to ensure traffic safety.Vehicle is certainly
Turn to when, real-time road condition information is had certain limitations, only under the premise of ensuring lane change safety, just allows auto-steering
Intervene, use condition has certain limitation.In comparison, the limitation of vehicle active brake requires less, therefore, most cases
Under, it should preferentially select automatic braking function.The structure of automatic breaking system determines controllability, the part life of deceleration
It is most important to traffic safety with the parameters such as development cost.
Currently, the existing Intelligent commercial vehicle majority in market is in manned conventional braking system, using existing antilock
Dead solenoid valve increases the automatic braking function that the components such as electromagnetic relay valve obtain unmanned mode, though such Intelligent commercial vehicle
Manned and unmanned mode is had both, can need switch over according to driver, but there are under unmanned mode, it is antilock
The dead solenoid valve service life is low and electromagnetic relay valve haves the shortcomings that structure is complicated, at high cost.For what is used under certain specific operations
For commercial vehicle, for example, the special operation vehicle of long-time fixed course traveling, the portions such as brake pedal, brake valve in existing system
Part, structural redundancy be easy to cause the arrangement space of the equipment such as power battery or upper dress nervous, and most main engine plants are often through reduction
The methods of container sizes exchange function realization for sacrifice use space.
Summary of the invention
The utility model provides a kind of vehicle for non-driver operating mechanism, the directionless disk of the vehicle, braking and
Gas pedal, variable-speed manipulator etc. meet the automatic braking system for automatic driving car of the actual demand of braking system control
System；The system is able to achieve automatic braking function under non-driver input condition, can optimization system structure to greatest extent, reduce
Development cost solves the above-mentioned deficiency of existing automatic breaking system.
Technical solutions of the utility model are described with reference to the drawings as follows:
A kind of automatic breaking system for automatic driving car, the braking system include electric air compressor 1, automatically controlled sky
Gas disposal unit 2, electronic parking memory valve 3, preceding air tank 4, rear air tank 5, pressure sensor 6, electric control braking solenoid valve 7,
Spring brake cylinder 8, anti-lock solenoid valve 9, urgent exhaust solenoid valve 10, manual exhaust valve 11, wheel speed sensors 12, control for brake
Device 13 and preceding brake chamber 14；The air inlet of the gas outlet of the electric air compressor 1 and automatically controlled air conditioner unit 2
It is connected；There are four gas outlet, respectively 21 mouthfuls, 22 mouthfuls, 23 mouthfuls and 24 mouthfuls for the automatically controlled air conditioner unit 2；The electricity
21 mouthfuls of control air conditioner unit 2 are connected with the air inlet of rear air tank 5；22 mouthfuls of the automatically controlled air conditioner unit 2 with
The air inlet of preceding air tank 4 is connected；The gas outlet of the preceding air tank 4 and rear air tank 5 is separately connected two electric control brakings
The air inlet of solenoid valve 7；The gas outlet of the electric control braking solenoid valve 7 respectively with two anti-lock solenoid valves 9 into
Port is connected；The gas outlet of anti-lock solenoid valve 9 described in two is connected with preceding brake chamber 14；It is antilock described in other two
The dead gas outlet of solenoid valve 9 is connected with 11 mouthfuls of spring brake cylinder 8；23 mouthfuls and electronics of the automatically controlled air conditioner unit 2
The air inlet of parking memory valve 3 is connected；The electronic parking memory valve 3 is vented electricity with urgent respectively by tee pipe coupling
Magnet valve 10,12 mouthfuls of manual exhaust valve 11 and spring brake cylinder 8 be connected；24 mouthfuls of the automatically controlled air conditioner unit 2 with it is auxiliary
It helps and is connected with device of air；The pressure sensor 6 is connected with preceding air tank 4 and rear air tank 5 respectively；The wheel speed sensing
Device 12 is mounted on wheel, and is connected with brake monitor 13；The brake monitor 13 and electric air compressor 1,
Automatically controlled air conditioner unit 2, electronic parking memory valve 3, electric control braking solenoid valve 7, anti-lock solenoid valve 9, wheel speed sensors 12
It is connected.
The brake monitor 13 is also connected by CAN bus with entire car controller, is received and is executed entire car controller
Deceleration request.
The urgent exhaust solenoid valve 10 is connect and is controlled by it by rigid line with entire car controller.
The electric air compressor 1 is gas source, the gas outlet of electric air compressor 1 with CAN communication function
Automatically controlled air conditioner unit 2 connects.
The electric control braking solenoid valve 7 is normally closed solenoid valve.
The utility model has the following beneficial effects:
1, the Pneumatic braking system is adjusted, entire car controller meter by pressure of the electric control braking solenoid valve to brake chamber
Deceleration size required for calculating, brake monitor controls electric control braking solenoid valve according to deceleration request, with wheel speed
The reference deceleration degree that sensor obtains forms pressure closed loop feedback, realizes the linear regulating function of vehicle service brake deceleration；
Electronic parking memory valve used by the system realizes vehicle parking braking function according to the instruction of brake monitor, works as braking
When controller or electronic parking memory defective valve, entire car controller controls urgent exhaust solenoid valve, to guarantee emergency brake function
Energy；When the failure of vehicle electric-control system, manual exhaust valve artificially can implement urgent parking to vehicle, guarantee traffic safety.
2, the utility model can guarantee that automatic driving vehicle can obtain good service brake performance under any operating condition
And performance of parking brake, air chamber pressure when using electric control braking solenoid valve control routine service brake obtain entire car controller
Desired deceleration, and it is mutually indepedent with anti-lock solenoid valve, the service life of anti-lock solenoid valve can not only be extended, guarantee control
Effect processed can also avoid that the excessive problem of anti-lock solenoid valve control bring pressure oscillation is used alone；
3, the utility model controls electronic parking memory valve and urgent row using brake monitor and entire car controller respectively
Pneumoelectric magnet valve can guarantee the traffic safety during electric control braking to the maximum extent, and when brake monitor being made to fail, vehicle still may be used
Emergency brake function is obtained, meanwhile, mechanical redundancy function is obtained by manual exhaust valve, guarantees the special circumstances such as debugging, maintenance
Under traffic safety.
Detailed description of the invention
Fig. 1 is the air braking system principle assumption diagram of the utility model；
Fig. 2 is electric control braking electromagnetic valve structure schematic diagram；
Fig. 3 is electronic parking memory valve structure chart.
In figure: 1, electric air compressor；2, automatically controlled air conditioner unit；3, electronic parking memory valve；4, preceding air tank；
5, rear air tank；6, pressure sensor；7, electric control braking solenoid valve；8, spring brake cylinder；9, anti-lock solenoid valve；10, urgent
Exhaust solenoid valve；11, manual exhaust valve；12, wheel speed sensors；13, brake monitor；14, preceding brake chamber；15, first into
Port；16, the first gas outlet；17, first row port；18, the second air inlet；19, the second gas outlet；20, third exhaust outlet；
21, exhaust solenoid valve；22, intake solenoid valve；5.1, it is vented coil；5.2, it is grounded 1；5.3,2 are grounded；5.4, the first air inlet
Coil；6.1, it is vented coil；6.2, it is grounded；6.3, the second air inlet coil.
Specific embodiment
Refering to fig. 1, a kind of automatic breaking system for automatic driving car, the braking system include electric air compressor
1, automatically controlled air conditioner unit 2, electronic parking memory valve 3, preceding air tank 4, rear air tank 5, pressure sensor 6, electric control braking
Solenoid valve 7, spring brake cylinder 8, anti-lock solenoid valve 9 are ABS solenoid valve, urgent exhaust solenoid valve 10, manual exhaust valve 11, wheel
Fast sensor 12, brake monitor 13 and preceding brake chamber 14.
Electric air compressor 1 provides air pressure for entire braking system, is gas source；The gas outlet of electric air compressor 1
It is connect with the automatically controlled air conditioner unit 2 with CAN communication function.Specifically: the gas outlet of the electric air compressor 1
It is connected with the air inlet of automatically controlled air conditioner unit 2.
There are four gas outlet, respectively 21 mouthfuls, 22 mouthfuls, 23 mouthfuls and 24 mouthfuls for the automatically controlled air conditioner unit 2；Described
21 mouthfuls of automatically controlled air conditioner unit 2 are connected with the air inlet of rear air tank 5；22 mouthfuls of the automatically controlled air conditioner unit 2
It is connected with the air inlet of preceding air tank 4；The gas outlet of the preceding air tank 4 and rear air tank 5 is separately connected two electric control
The air inlet of moving electromagnetic valve 7；The gas outlet of the electric control braking solenoid valve 7 respectively with two anti-lock solenoid valves 9
Air inlet is connected；The gas outlet of anti-lock solenoid valve 9 described in two is connected with preceding brake chamber 14；It is anti-described in other two
11 mouthfuls of the gas outlet of locking solenoid valve 9 and spring brake cylinder 8 are connected.22 mouthfuls of automatically controlled air conditioner unit 2 are to preceding braking gas
Device between room 14 constitutes front brake circuit, and 21 mouthfuls of automatically controlled air conditioner unit 2 to the device structure between spring brake cylinder 8
At rear brake circuit.Front brake circuit and rear brake circuit collectively form service brake circuit.
23 mouthfuls of the automatically controlled air conditioner unit 2 are connected with the air inlet of electronic parking memory valve 3；The electronics
Parking memory valve 3 by tee pipe coupling respectively with urgent exhaust solenoid valve 10, manual exhaust valve 11 and spring brake cylinder 8
12 mouthfuls be connected；Compressed air from 23 mouthfuls of automatically controlled air conditioner unit through electronic parking memory valve 3 to 12 mouthfuls of spring brake cylinder, structure
At parking brake loop.
24 mouthfuls of the automatically controlled air conditioner unit 2 are connected with auxiliary with device of air；
The automatically controlled air conditioner unit 2 is air filtration and the drying device of whole system, passes through real-time monitoring
The integral pressure level of system carry out the off-load of itself, blowback movement, meanwhile, may occur for a long time can not off-load work
Condition, such as long descent run can carry out off-load, blowback, according to maximum time threshold value to guarantee automatically controlled air conditioner unit
2 service life and using effect.After off-load, off-load signal is sent to vehicle CAN by the automatically controlled air conditioner unit 2
Bus, control electric air compressor 1 stall；In addition, when electric under vehicle, the automatically controlled voluntarily off-load of air conditioner unit 2, with
Air compressor machine band is avoided to carry starting.The gas outlet phase of the air inlet of the automatically controlled air conditioner unit 2 and electric air compressor 1
Even, the gas outlet of automatically controlled air conditioner unit 2,21 mouthfuls are connected with rear air tank, and 22 mouthfuls are connected with preceding air tank, 23 mouthfuls and electricity
The air inlet of sub- parking memory valve 3 is connected, and 24 mouthfuls are connected with auxiliary with device of air.
The auxiliary is user's external equipment with device of air, and gas equipment can be installed according to actual use demand, such as
Repacking air horn takes the equipment such as air cock.
The preceding air tank 4, rear air tank 5 are connected with pressure sensor 6 respectively；The wheel speed sensors 12 are installed
On wheel.
The electric control braking solenoid valve 7 is normally closed solenoid valve.
The brake monitor 13 receives by CAN bus and executes the deceleration request of entire car controller.
The brake monitor 13 and electric air compressor 1, automatically controlled air conditioner unit 2, electronic parking memory valve
3, electric control braking solenoid valve 7, anti-lock solenoid valve 9, wheel speed sensors 12 are connected.In addition, the brake monitor 13 also passes through
CAN bus is connect and is controlled by it by rigid line with entire car controller, is not controlled by brake monitor 13, is received and executed vehicle
Signal and the failure for reporting brake monitor 13.
The working principle of the braking system is: for service brake circuit, brake monitor 13, which receives, comes from full-vehicle control
The deceleration request signal that device is issued and transmitted through CAN bus acts electric control braking solenoid valve 7, makes compressed gas through automatically controlled
Braking electromagnetic valve 7, brake chamber 14 and spring brake cylinder 8 before being transmitted to through anti-lock solenoid valve 9, and generate brake
Power, meanwhile, monitor the signal and the received deceleration request signal of CAN bus of wheel speed sensors 12 in real time.In the process, altogether
There are three types of working conditions, are acted and are completed by electric control braking solenoid valve 7.
Referring to Fig.2, the electric control braking solenoid valve 7 is a kind of normally closed solenoid valve, there is pressurization, pressure maintaining and decompression function
Can, specific work process is as follows:
Pressurized state, when the vehicle reference deceleration obtained by 12 signal estimation of wheel speed sensors is received less than CAN bus
Deceleration target value when, continue to the power supply of the exhaust coil 6.1 and air inlet coil 6.3 of electric control braking solenoid valve 7, at this point, electric
Control moving electromagnetic valve 7 first row port 17 block, compressed air flow to the first gas outlet 16 through the first air inlet 15, continue to
Preceding brake chamber 14 and spring brake cylinder 8 supply, and brake generates bigger braking moment, and vehicle reference deceleration further increases
Add.
State of pressure keeping, when the vehicle reference deceleration obtained by 12 signal estimation of wheel speed sensors is received equal to CAN bus
Deceleration target value when, to the power supply of the exhaust coil 6.1 of electric control braking solenoid valve 7 and air inlet coil 6.3 is not powered, at this point,
15 pressure of the first air inlet of electric control braking solenoid valve 7 does not enter back into valve body, and compressed air can not be from first row port in valve body
17 discharges, 16 outlet pressure of the first gas outlet remain unchanged, and the braking moment that brake generates is constant, and vehicle reference deceleration is not
Become.
It is received to be greater than CAN bus by the vehicle reference deceleration that 12 signal estimation of wheel speed sensors obtains for decompression state
When deceleration target value, do not power to the exhaust coil 6.1 and air inlet coil 6.3 of electric control braking solenoid valve 7, at this point, electric control
15 pressure of the first air inlet of moving electromagnetic valve 7 can not enter back into valve body, 16 phase of the first gas outlet with electric control braking solenoid valve 7
Compressed gas in brake chamber even is discharged through the first gas outlet 16, and the braking moment that brake generates reduces, vehicle reference
Deceleration reduces.
In above-mentioned service braking operation, the electric control braking solenoid valve 7 of front and back braking is issued according to brake monitor 13
Instruction self contained function, front and back braking force distribution can be optimized to the maximum extent, meanwhile, electric control braking solenoid valve 7 is only receiving
It is acted when braking instruction, when effectively preventing that anti-lock solenoid valve 9 is used alone, needs to act for a long time in driving,
The problem of causing early stage in service life to be lost.When vehicle is in low attachment road surface emergency braking, it is easy to appear electric control braking solenoid valve 7
Wheel lock up phenomenon occurs under pressurized state, at this point, electric control braking solenoid valve 7 maintains original state, by anti-lock solenoid valve 9
The pressure of 8 air inlet of preceding brake chamber 14 and spring brake cylinder is adjusted, insensitivity can be effectively improved, and will be antilock
Dead system (ABS system) triggering information reports entire car controller through CAN bus, avoids wrong report of breaking down.
For parking brake loop, compressed gas flows into electronic parking note from 23 mouthfuls of outflows of automatically controlled air conditioner unit 2
Recall valve 3, the second gas outlet 19 of electronic parking memory valve 3 is connected with 12 mouthfuls of spring brake cylinder 8, the parking to gas chamber spring cylinder
Brake chamber is controlled, and is realized parking braking and is released parking braking function.Meanwhile second in electronic parking memory valve 3 goes out
Between port 19 and 12 mouthfuls of spring brake cylinder 8, arranged using tee pipe coupling by pipeline and urgent exhaust solenoid valve 10 and manually
The air inlet of air valve 11 is connected.Under nominal situation, vehicle start, which releases parking, parking applies parking and parking is used to be used as is answered
Anxious braking function is completed by electronic parking memory valve 3.When brake monitor 13 or electronic parking memory valve 3 break down, nothing
When method realizes above-mentioned parking and emergency brake function, urgent exhaust solenoid valve 10 can be acted by entire car controller, be realized urgent
In the case of emergency brake and parking function, the urgent exhaust solenoid valve 10 is only by vehicle control unit controls；When vehicle control
When device or CAN line processed breaks down, artificial emergency brake and parking function can be realized using manual exhaust valve 11.
Refering to Fig. 3, the electronic parking memory valve 3 is a kind of two-bit triplet solenoid valve, exhaust solenoid valve 21 and air inlet electricity
The every movement of magnet valve 22 is primary, just changes the operating position of a valve body, due in electronic parking memory valve 3 without return spring, because
This, after exhaust solenoid valve 21 or each movement of intake solenoid valve 22, valve body keeps the position after electromagnetism valve events, under solenoid valve
Before one-off, work on hand state is maintained, there is memory function.Second air inlet 18 is the air inlet of electronic parking memory valve 3
Valve port, the second gas outlet 19 are the outlet valve port of electronic parking memory valve 3, and third exhaust outlet 20 is electronic parking memory valve 3
Exhaust valve port.
In attached drawing 5.1 be exhaust solenoid valve 21 exhaust coil, 5.4 be intake solenoid valve 22 the first air inlet coil, 5.2
It is ground line 2 for ground line 1,5.3.When exhaust coil 5.1 is connected with the 5.2 of ground line 1, the second gas outlet 19 and third row
Port 20 is connected, and electronic parking remembers valve exhaust, and vehicle applies parking braking；When the first air inlet coil 5.4 and ground line 1
When 5.2 connection, the second air inlet 18 is connected with the second gas outlet 19, and electronic parking memory valve inflation, vehicle releases parking braking.
The gas source of electric air compressor 1 and automatically controlled air conditioner unit 2 as system can be used in above-described embodiment,
Standard machinery formula air compressor and pressure discharging type air conditioner unit can be used or volume discharging type air conditioner unit is made
For the gas source of system.
Claims (5)
1. a kind of automatic breaking system for automatic driving car, which is characterized in that the braking system includes electric air compression
Machine (1), automatically controlled air conditioner unit (2), electronic parking memory valve (3), preceding air tank (4), rear air tank (5), pressure sensing
Device (6), electric control braking solenoid valve (7), spring brake cylinder (8), anti-lock solenoid valve (9), urgent exhaust solenoid valve (10), manually
Exhaust valve (11), wheel speed sensors (12), brake monitor (13) and preceding brake chamber (14)；The electric air compressor
(1) gas outlet is connected with the air inlet of automatically controlled air conditioner unit (2)；There are four the automatically controlled air conditioner units (2)
Gas outlet, respectively 21 mouthfuls, 22 mouthfuls, 23 mouthfuls and 24 mouthfuls；21 mouthfuls of the automatically controlled air conditioner unit (2) and rear air tank
(5) air inlet is connected；22 mouthfuls of the automatically controlled air conditioner unit (2) are connected with the air inlet of preceding air tank (4)；It is described
Preceding air tank (4) and the gas outlet of rear air tank (5) be separately connected the air inlets of two electric control braking solenoid valves (7)；Each
The gas outlet of the electric control braking solenoid valve (7) is connected with the air inlet of two anti-lock solenoid valves (9) respectively；Described in two
The gas outlet of anti-lock solenoid valve (9) be connected with preceding brake chamber (14)；Anti-lock solenoid valve (9) described in other two
11 mouthfuls of gas outlet and spring brake cylinder (8) are connected；23 mouthfuls of the automatically controlled air conditioner unit (2) are remembered with electronic parking
The air inlet of valve (3) is connected；The electronic parking memory valve (3) by tee pipe coupling respectively with urgent exhaust solenoid valve
(10), 12 mouthfuls of manual exhaust valve (11) and spring brake cylinder (8) are connected；24 mouthfuls of the automatically controlled air conditioner unit (2)
It is connected with auxiliary with device of air；The pressure sensor (6) is connected with preceding air tank (4) and rear air tank (5) respectively；Described
Wheel speed sensors (12) are mounted on wheel, and are connected with brake monitor (13)；The brake monitor (13) and electricity
It is engine-driven air compressor (1), automatically controlled air conditioner unit (2), electronic parking memory valve (3), electric control braking solenoid valve (7), antilock
Dead solenoid valve (9), wheel speed sensors (12) are connected.
2. a kind of automatic breaking system for automatic driving car according to claim 1, which is characterized in that the system
Movement controller (13) is also connected by CAN bus with entire car controller, and the deceleration request of entire car controller is received and execute.
3. a kind of automatic breaking system for automatic driving car according to claim 1, which is characterized in that described is tight
Anxious exhaust solenoid valve (10) is connect and is controlled by it by rigid line with entire car controller.
4. a kind of automatic breaking system for automatic driving car according to claim 1, which is characterized in that described electronic
Air compressor (1) is gas source, the gas outlet of electric air compressor (1) and the automatically controlled air-treatment for having CAN communication function
Unit (2) connection.
5. a kind of automatic breaking system for automatic driving car according to claim 1, which is characterized in that the electricity
Controlling moving electromagnetic valve (7) is normally closed solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821117923.5U CN208842388U (en) | 2018-07-16 | 2018-07-16 | A kind of automatic breaking system for automatic driving car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821117923.5U CN208842388U (en) | 2018-07-16 | 2018-07-16 | A kind of automatic breaking system for automatic driving car |
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| Publication Number | Publication Date |
|---|---|
| CN208842388U true CN208842388U (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821117923.5U Active CN208842388U (en) | 2018-07-16 | 2018-07-16 | A kind of automatic breaking system for automatic driving car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803147A (en) * | 2019-11-27 | 2020-02-18 | 一汽解放汽车有限公司 | Air braking system and braking method thereof |
-
2018
- 2018-07-16 CN CN201821117923.5U patent/CN208842388U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110803147A (en) * | 2019-11-27 | 2020-02-18 | 一汽解放汽车有限公司 | Air braking system and braking method thereof |
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