CN106515696A - Air-pressure-adjustable electronic braking system for medium-duty/heavy-duty vehicle - Google Patents
Air-pressure-adjustable electronic braking system for medium-duty/heavy-duty vehicle Download PDFInfo
- Publication number
- CN106515696A CN106515696A CN201611201737.5A CN201611201737A CN106515696A CN 106515696 A CN106515696 A CN 106515696A CN 201611201737 A CN201611201737 A CN 201611201737A CN 106515696 A CN106515696 A CN 106515696A
- Authority
- CN
- China
- Prior art keywords
- valve
- air
- electromagnetic valve
- duty
- output end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000004146 energy storage Methods 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 21
- 230000009977 dual effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/70—Electrical control in fluid-pressure brake systems by fluid-controlled switches
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses an air-pressure-adjustable electronic braking system for a medium-duty/heavy-duty vehicle. The air-pressure-adjustable electronic braking system for the medium-duty/heavy-duty vehicle comprises an air storage tank (1), a two-position three-way double-coil electromagnetic valve (3), an electromagnetic valve (4), left and right rear wheel spring energy-storage brake cylinders (7), and an electric control unit (10), wherein the air storage tank (1), the two-position three-way double-coil electromagnetic valve (3), the electromagnetic valve (4), and the left and right rear wheel spring energy-storage brake cylinders (7) are sequentially connected through an air circuit, and the electric control unit (10) is electrically connected with the two-position three-way double-coil electromagnetic valve (3) and the electromagnetic valve (4). A relay valve (5) is connected to the portion, between the electromagnetic valve (4) and the left and right rear wheel spring energy-storage brake cylinders (7), of the air circuit in series. The control input end of the relay valve (5) is connected with the output end of the electromagnetic valve (4), the air pressure input end of the relay valve (5) is directly connected with the output end of the air storage tank (1), and the output end of the relay valve (5) is connected with the input ends of the left and right rear wheel spring energy-storage brake cylinders (7). According to the air-pressure-adjustable electronic braking system for the medium-duty/heavy-duty vehicle, the parking brake control sensitivity is high, the structure is simple, and the cost is low.
Description
Technical field
The invention belongs to brake system of car technical field, particularly a kind of air pressure adjustable electricity for medium-weight vehicle
Sub- brakes.
Background technology
Medium-weight vehicle, i.e. commercial car, as the personnel of transport and the vehicles of goods, play the part of emphatically in Modern Traffic
The role for wanting.Which is often travelled under complicated road conditions, and especially on mountain area and hills Deng Po roads road surface, this is with regard to centering heavy goods vehicles
Brakes and the driving technology of driver propose extremely strict requirements, once parking brake control is improper will slip
The phenomenon on slope.The safety of vehicle is largely dependent upon the technical merit of driver and the experience accumulated in driving procedure.With
Traditional Manual air-pressure parking, it is operationally complex, especially during uphill starting, if parking brake is put too early
And driving force is then easily caused when being not enough to overcome resistance and slipped by slope, cannot start immediately if parking brake is put late and make engine
It is flame-out.
To overcome inadequate, bad adaptability of processing safety of medium-heavy automobile air-pressure type electronic parking braking system presence etc.
Shortcoming, Chinese invention patent application " air pressure adjustable holding brake device " (application number：201410026018.9, publication date：
On April 30th, 2014) a kind of air pressure adjustable holding brake device is disclosed, the device includes the gas storage being sequentially connected by gas circuit
Tank, baroceptor and spring-loaded brake cylinder, and the ECU electrically connected with baroceptor, the air accumulator with
Two-bit triplet Double coil electromagnetic valve, relay valve and magnetic valve have been sequentially connected in series in gas circuit between baroceptor also.The invention
In, the output end of relay valve is connected with the input of 2/2-way magnetic valve, due to the ventilation aperture of 2/2-way magnetic valve it is little,
The time of the release and applying of parking braking can be postponed.
In a word, the problem of prior art presence is：Parking braking system braking for medium-weight vehicle applies and discharges
Time lengthening, reduces control effect, or needs the passage of 2/2-way magnetic valve to become big, increase cost.
The content of the invention
It is an object of the invention to provide a kind of air pressure adjustable electric brake system for medium-weight vehicle, parking system
Dynamic control sensitivity is high, simple structure, low cost.
The technical solution for realizing the object of the invention is：
A kind of air pressure adjustable electric brake system for medium-weight vehicle, including the gas storage being sequentially connected by gas circuit
Tank, two-bit triplet Double coil electromagnetic valve, magnetic valve and left and right rear wheel spring-loaded brake cylinder, and respectively with described two three
Logical Double coil electromagnetic valve, the ECU of magnetic valve electrical connection, go here and there in the gas circuit between magnetic valve and spring-loaded brake cylinder
Relay valve is connected to, the control signal of the relay valve is connected with the output end of magnetic valve, its air pressure input and air accumulator
Output end is joined directly together, and its output end is connected with the input of spring-loaded brake cylinder.
Compared with prior art, its remarkable advantage is the present invention：
1st, brake timely：2/2-way magnetic valve is put into into the control end of relay valve, original device can be lowered to braking gas
The impact of pipeline inflation/deflation speed, does not extend the reaction time of parking braking, and function is reliable, braking is timely；
2nd, reduce the requirement to magnetic valve：The little problem in the ventilation aperture of 2/2-way magnetic valve is which solves, because
This can also improve requirement of the original device to magnetic valve throughput, it is not necessary to propose excessive demand to magnetic valve, reduce magnetic valve
Cost.
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Description of the drawings
Fig. 1 is structural representation (embodiment of the present invention for the air pressure adjustable electric brake system of medium-weight vehicle
One, using relay valve).
Fig. 2 is that embodiment one releases parking braking and keeps the fundamental diagram of non-parked state.
Fig. 3 is that embodiment one applies parking braking and keeps the fundamental diagram of parked state.
Fig. 4 is structural representation (embodiment of the present invention for the air pressure adjustable electric brake system of medium-weight vehicle
Two, using differential type relay valve).
Structural representations of the Fig. 5 for relay valve.
Structural representations of the Fig. 6 for differential type relay valve.
In figure,
1 air accumulator, 2 first baroceptors, 3 two-bit triplet Double coil electromagnetic valves, 4 2/2-way normally open solenoid valves, 5 after
Dynamic valve, 6 second baroceptors, 7 spring-loaded brake cylinders, 8 automobile left rear wheels, 9 automobile off hind wheels, 10 ECUs, 11 is poor
Dynamic formula relay valve, 31 two-bit triplet dual coil electromagnetic valve coils one, 32 two-bit triplet dual coil electromagnetic valve coils two, P two three
Logical Double coil electromagnetic valve air inlet, A two-bit triplet dual coil electromagnetic valve air gates, R two-bit triplet dual coil electromagnetic valve outlets.
Specific embodiment
As shown in figure 1, the present invention for medium-weight vehicle air pressure adjustable electric brake system, including by gas circuit successively
The air accumulator 1 of connection, two-bit triplet Double coil electromagnetic valve 3, magnetic valve 4 and left and right rear wheel spring-loaded brake cylinder 7, Yi Jifen
The ECU 10 not electrically connected with the two-bit triplet Double coil electromagnetic valve 3, magnetic valve 4, in magnetic valve 4 and spring energy-storage system
Relay valve 5 is serially connected with gas circuit between dynamic cylinder 7, the control signal of the relay valve 5 is connected with the output end of magnetic valve 4,
Its air pressure input is joined directly together with the output end of air accumulator 1, and its output end is connected with the input of spring-loaded brake cylinder 7.
The magnetic valve 4 is 2/2-way normally open solenoid valve.
The relay valve 5 can be differential type relay valve 11.
The first baroceptor 2 is provided with 1 output end of air accumulator, second is provided with the input of spring-loaded brake cylinder 7
Baroceptor 6, first baroceptor 2, the second baroceptor 6 are electrically connected with ECU 10 respectively.
Two-bit triplet Double coil electromagnetic valve operation principle is as follows：
When coil 31 is powered, magnetic valve is in exhaust condition " I "：Air inlet P ends, gas outlet A connection exhaust outlet R,
Relay valve 5 controls air pressure and discharges from exhaust outlet R, discharges 7 air pressure Jing servos valve outlet of spring-loaded brake cylinder then, coil
After power-off, magnetic valve maintains state before power-off, and now vehicle can apply state in parking braking for a long time；
When coil 32 is powered, magnetic valve is in air-suction state " II "：Exhaust outlet R ends, air inlet P connection gas outlet A,
5 control mouth of relay valve is inflated, and inflates spring-loaded brake cylinder 7 then, equally, after coil blackout, before magnetic valve maintains power-off
State, now vehicle can for a long time in parking braking releasing state.
One embodiment of medium-weight vehicle air pressure adjustable electric brake system of the present invention is illustrated in figure 1, wherein
Gas circuit annexation between each part is：
The air pressure input of the output end of air accumulator 1 input respectively with two-bit triplet Double coil electromagnetic valve 3, relay valve 5
End is connected, and the output end of two-bit triplet Double coil electromagnetic valve 3 is connected with the input of 2/2-way normally open solenoid valve 4, two two
The output end of generally open electromagnetic valve 4 is connected with the control signal of relay valve 5, output end and the left and right rear wheel bullet of relay valve 5
The input of spring loaded brake cylinder 7 is connected.
As shown in Fig. 2 medium-weight vehicle of the present invention with air pressure adjustable electric brake system (adopt common relay valve, its
Structure is as shown in figure 5, when 4) only one of which control mouth releases parking braking, ECU 10 controls 2/2-way normally open solenoid valve
4 power-off are opened, and make which be switched to the second state while controlling two-bit triplet Double coil electromagnetic valve 3, and gases at high pressure are logical from air accumulator 1
Cross two-bit triplet Double coil electromagnetic valve 3,2/2-way normally open solenoid valve 4 and enter into the control signal of relay valve 5, so as to open
Relay valve 5 so that the gases at high pressure in air accumulator 1 are entered in spring-loaded brake cylinder 7 by relay valve 5.Now automatically controlled list
Signal of the unit 10 by the second baroceptor 6 of detection, monitors the atmospheric pressure value in spring-loaded brake cylinder 7, and according to the second gas
The signal of pressure sensor 6 is closed to 2/2-way normally open solenoid valve 4 and the high frequency opened quickly is controlled.When spring energy-storage system
When in dynamic cylinder 7 full of gases at high pressure, energy-storaging spring is compressed, and parking braking is released therewith.
After the pressure in spring-loaded brake cylinder 7 reaches its setting upper limit, the control two-bit triplet two-wire of ECU 10
Circle magnetic valve 3 keeps it in the second state, while control 4 power-off of 2/2-way normally open solenoid valve opening, maintains spring energy-storage
High pressure in checking cylinder 7, parking braking release state and keep.
As Fig. 3 shows, medium-weight vehicle of the present invention is applied with air pressure adjustable electric brake system (adopting common relay valve)
During parking braking, 4 power-off of the control 2/2-way of ECU 10 normally open solenoid valve is opened, while controlling two-bit triplet twin coil electricity
Magnet valve 3 makes which be switched to first state, and gases at high pressure enter air from 7 Jing relay valves 5 of spring-loaded brake cylinder.Now automatically controlled list
Signal of the unit 10 by the second baroceptor 6 of detection, monitors the atmospheric pressure value in spring-loaded brake cylinder 7, and according to the second gas
The signal of pressure sensor 6 is closed to 2/2-way normally open solenoid valve 4 and the high frequency opened quickly is controlled, so as to according to reality
Demand in time applies brake force.
When 7 inner high voltage gas of spring-loaded brake cylinder is discharged, the control two-bit triplet of ECU 10 Double coil electromagnetic valve 3 makes
Which is maintained at first state, while control 4 power-off of 2/2-way normally open solenoid valve opening, parking braking state keeps.
As shown in figure 4, the relay valve 5 is differential type relay valve (its structure is as shown in Figure 6), which has two control mouths
41st, 42, it is connected with driving gas circuit, parking gas circuit respectively.Common relay valve is replaced using differential type relay valve, driving is prevented from
And parking brake system is while when operating, the power in arrester is overlapped, so as to avoid mechanical transfer element excess load, prolonged mechanical
The transmitting element life-span.
Present invention employing " two-bit triplet Double coil electromagnetic valve+2/2-way normally open solenoid valve+relay valve (or differential servo
Valve) " structure, the power-off of 2/2-way normally open solenoid valve open in the case of, two shapes of two-bit triplet Double coil electromagnetic valve
State " I " and " II " correspond to the applying and releasing of parking braking respectively, while by pressure monitoring, reaching setting limit value in pressure
Afterwards, ECU gives two-bit triplet Double coil electromagnetic valve power-off, and after power-off, two-bit triplet dual coil electromagnetic valve core remains to keep
Position before power-off, realizes state memorization, and reliability is high.
2/2-way magnetic valve is put into the present invention control end of relay valve, solves the logical of 2/2-way normally open solenoid valve
The little problem for reducing flow velocity in pore footpath, does not affect the reaction time of parking braking, and function is reliable, braking is timely, improves original-pack
Put the requirement to 2/2-way normally open solenoid valve throughput, it is not necessary to excessive demand is proposed to magnetic valve, cost has been saved.
Claims (4)
1. a kind of air pressure adjustable electric brake system for medium-weight vehicle, including the air accumulator being sequentially connected by gas circuit
(1), two-bit triplet Double coil electromagnetic valve (3), magnetic valve (4) and left and right rear wheel spring-loaded brake cylinder (7), and respectively with
The ECU (10) that the two-bit triplet Double coil electromagnetic valve (3), magnetic valve (4) are electrically connected, it is characterised in that：
Relay valve (5) is serially connected with gas circuit between magnetic valve (4) and spring-loaded brake cylinder (7), the relay valve (5)
Control signal is connected with the output end of magnetic valve (4), and its air pressure input is joined directly together with the output end of air accumulator (1), its
Output end is connected with the input of spring-loaded brake cylinder (7).
2. brakes according to claim 1, it is characterised in that：The magnetic valve (4) is the normally opened electromagnetism of 2/2-way
Valve.
3. brakes according to claim 1, it is characterised in that：The relay valve (5) can be differential type relay valve
(11)。
4. brakes according to claim 1, it is characterised in that：The first air pressure transmission is provided with air accumulator (1) output end
Sensor (2), is provided with the second baroceptor (6), first baroceptor in the input of spring-loaded brake cylinder (7)
(2), the second baroceptor (6) is electrically connected with ECU (10) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611201737.5A CN106515696A (en) | 2016-12-23 | 2016-12-23 | Air-pressure-adjustable electronic braking system for medium-duty/heavy-duty vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611201737.5A CN106515696A (en) | 2016-12-23 | 2016-12-23 | Air-pressure-adjustable electronic braking system for medium-duty/heavy-duty vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106515696A true CN106515696A (en) | 2017-03-22 |
Family
ID=58337382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611201737.5A Pending CN106515696A (en) | 2016-12-23 | 2016-12-23 | Air-pressure-adjustable electronic braking system for medium-duty/heavy-duty vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106515696A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738634A (en) * | 2017-11-13 | 2018-02-27 | 赖沙杰 | Lorry Pneumatic multifunctional electronics parking brake |
| CN109353325A (en) * | 2018-11-14 | 2019-02-19 | 南京理工大学 | A kind of air-pressure type electronic parking braking system |
| CN110103927A (en) * | 2019-04-19 | 2019-08-09 | 南京金龙客车制造有限公司 | A kind of electronic parking control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006125615A2 (en) * | 2005-05-25 | 2006-11-30 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Parking brake mechanism of a vehicle comprising an electro-pneumatic emergency release mechanism |
| EP2133250A1 (en) * | 2008-06-11 | 2009-12-16 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Park brake valve assembly for a braking system of a commercial vehicle |
| EP2133247A2 (en) * | 2008-06-11 | 2009-12-16 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Parking brake valve assembly |
| CN106170421A (en) * | 2014-04-09 | 2016-11-30 | 克诺尔商用车制动系统有限公司 | Device is controlled for controlling the electric braking of spring power-storing brake |
| CN206344798U (en) * | 2016-12-23 | 2017-07-21 | 南京理工大学 | Air pressure adjustable electric brake system for medium-weight vehicle |
-
2016
- 2016-12-23 CN CN201611201737.5A patent/CN106515696A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006125615A2 (en) * | 2005-05-25 | 2006-11-30 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Parking brake mechanism of a vehicle comprising an electro-pneumatic emergency release mechanism |
| EP2133250A1 (en) * | 2008-06-11 | 2009-12-16 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Park brake valve assembly for a braking system of a commercial vehicle |
| EP2133247A2 (en) * | 2008-06-11 | 2009-12-16 | KNORR-BREMSE Systeme für Nutzfahrzeuge GmbH | Parking brake valve assembly |
| CN106170421A (en) * | 2014-04-09 | 2016-11-30 | 克诺尔商用车制动系统有限公司 | Device is controlled for controlling the electric braking of spring power-storing brake |
| CN206344798U (en) * | 2016-12-23 | 2017-07-21 | 南京理工大学 | Air pressure adjustable electric brake system for medium-weight vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107738634A (en) * | 2017-11-13 | 2018-02-27 | 赖沙杰 | Lorry Pneumatic multifunctional electronics parking brake |
| CN109353325A (en) * | 2018-11-14 | 2019-02-19 | 南京理工大学 | A kind of air-pressure type electronic parking braking system |
| CN110103927A (en) * | 2019-04-19 | 2019-08-09 | 南京金龙客车制造有限公司 | A kind of electronic parking control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206598840U (en) | A kind of Pneumatic braking system with active brake function | |
| CN205417585U (en) | Commercial vehicle's automatic parking control system | |
| CN103770770B (en) | Integrated form automatic parking brake device | |
| CN106627535A (en) | Air braking system with active braking function and control method | |
| CN105313868A (en) | Service braking system based on intelligent hill-start assist | |
| CN106515696A (en) | Air-pressure-adjustable electronic braking system for medium-duty/heavy-duty vehicle | |
| CN101913351B (en) | Pneumatic braking system, crane with pneumatic braking system and pneumatic braking method | |
| CN203920726U (en) | Integrated form automatic parking brake device | |
| CN205168477U (en) | Service braking system all based on intelligence hill start is supplementary | |
| CN103754211B (en) | Air pressure adjustable holding brake device | |
| CN206344798U (en) | Air pressure adjustable electric brake system for medium-weight vehicle | |
| CN110816502A (en) | Intelligent parking EPB valve system, EPB valve assembly and intelligent parking control method for commercial vehicle | |
| CN110341675A (en) | A kind of interim parking system of commercial vehicle and its control method | |
| CN101244685B (en) | Electric control device of air chamber for air suspension follow-up bridge and control method | |
| CN108501922B (en) | Pneumatic electronic parking system | |
| CN205168478U (en) | Vapour -pressure type service braking system all with hill start miscellaneous function | |
| CN110371095A (en) | A kind of service braking system and vehicle | |
| CN105235672B (en) | Vapour-pressure type service braking system with uphill starting miscellaneous function | |
| CN212073995U (en) | Unmanned new forms of energy passenger train drive-by-wire air brake system | |
| CN108327696B (en) | Gas-electricity hybrid control braking system of rubber-tyred train | |
| CN114030451B (en) | Electric control air pressure braking system and method | |
| CN109677386A (en) | Unmanned and manned line traffic control gas braking system can be switched | |
| CN212386470U (en) | Intelligent digital electric control air brake valve for automobile | |
| CN209813969U (en) | Electronic parking system | |
| CN220974144U (en) | Hand brake unit and electronic brake control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |
|
| RJ01 | Rejection of invention patent application after publication |