CN201136416Y - Modeling central charging and deflating control device for off road vehicle tyres - Google Patents
Modeling central charging and deflating control device for off road vehicle tyres Download PDFInfo
- Publication number
- CN201136416Y CN201136416Y CNU2007200880859U CN200720088085U CN201136416Y CN 201136416 Y CN201136416 Y CN 201136416Y CN U2007200880859 U CNU2007200880859 U CN U2007200880859U CN 200720088085 U CN200720088085 U CN 200720088085U CN 201136416 Y CN201136416 Y CN 201136416Y
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- China
- Prior art keywords
- bridge
- valve
- tire
- discharge
- central authorities
- 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.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
- B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
- B60C23/00372—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres characterised by fluid diagrams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/001—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving
- B60C23/003—Devices for manually or automatically controlling or distributing tyre pressure whilst the vehicle is moving comprising rotational joints between vehicle-mounted pressure sources and the tyres
- B60C23/00354—Details of valves
Abstract
The utility model discloses a central air charging and deflating control device of a modular cross-country car tyre, which relates to the vehicle air charging and deflating technology. The central air charging and deflating control device has a structure as follows: tyres (C) are respectively arranged on a first bridge, a second bridge, a third bridge and a fourth bridge of a cross-country car; an air supply (D), a control valve assembly (A), an air deflating electromagnetic valve (G), a rotary sealing air chamber (H), a car wheel valve (F), a car tyre locking valve (E) and typres (D) are communicated in sequence by pipelines (I); a controller (B) is connected with the central air charging and deflating control valve assembly (A); the modular control of charging air, deflating air, measuring the pressure and protecting the pressure on the tyres (C) is realized through the controller (B). The central air charging and deflating control device is a modular structure and a modular control method, has good performance and convenient operation and guarantees the safety traffic of the car in various bad environments.
Description
Technical field
The utility model relates to a kind of vehicle and charges and discharge the gas technology, relates in particular to the central air inflation discharging control device of a kind of medelling cross-country vehicle tire.
Background technology
The motor tire central air-charging and air-discharging system be a cover automobile under steam when stagnation of movement (or) can detect system with the adjusting knurl air pressure at any time; Its main effect is: when automobile during by soft terrain such as desert, coastal beach, marsh, marshy area and ice and snow road, can reduce tire pressure apace by this system, increase the ground contact area of tire, on the one hand tire sinkage and soil resistance force are reduced; On the other hand,, increase the propulsive force of soil, increase tractive force significantly, improve the crossing ability of automobile owing to increasing of decorative pattern number in the tire embedding soil.
When the height of transporting cars is limited by bridge opening, culvert, mother aircraft hatch door etc., in certain scope,, the automobile bottom-to-top-height is suitably reduced, just can pass through smoothly if reduce tire pressure.
When motor tire is punctured with quilt that attack is worn,, can make automobile leave the danger zone as early as possible or arrive the destination if can give in the process of moving automobile tyre inflation in real time.
When the higher and automobile long-distance of road environment temperature travels continuously,, may cause tyre break because the tire heating raises the tire internal gas pressure; If can give the venting of motor tire in the process of moving in real time, can avoid the generation of dangerous situation.
Military cross country car is when transporting weaponry, vehicular weapons system, traffic guidance system and the battlefield wounded, slow down impact and vibration if can adjust tire pressure in real time, can strengthen manoevreability, safety and the viability of military supplies according to different condition of road surfaces.
The motor tire central air-charging and air-discharging system adopts rocker switch control more at present, and inconvenient operation need have the chaufeur of consummate technology to operate.And present motor tire central air-charging and air-discharging system can not be implemented in to charge and discharge and turn-off the tire air-flow in the gas process at any time, plays the effect of protection tire.
By retrieval, in present motor tire central air-charging and air-discharging system, Shang Weiyou finds to adopt the structure and the method for medelling control.
Summary of the invention
The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect that prior art exists, and provides a kind of medelling cross-country vehicle tire central air inflation discharging control device.
The purpose of this utility model is achieved in that
One, medelling cross-country vehicle tire central authorities air inflation discharging control device (being called for short this device)
As Fig. 1,2,3,4,5,
This device comprises that central authorities charge and discharge gas control valve assembly (A), controller (B), tire (C), source of the gas (D), automobile tyre locking-valve (E), automobile tyre valve (F), pressure-releasing electromagnetic valve (G), rotary seal air chamber (H) and pipeline (I);
On first, second, third and fourth bridge of cross country car, be separately installed with tire (C); By pipeline (I), source of the gas (D), control valve assembly (A), pressure-releasing electromagnetic valve (G), rotary seal air chamber (H), automobile tyre valve (F), automobile tyre locking-valve (E), tire (C) are communicated with successively; Controller (B) charges and discharge gas control valve assembly (A) with central authorities and is connected;
By controller (B), realize tire (C) is charged and discharged the medelling control of gas, pressure measurement, pressurize;
Described central authorities charge and discharge gas control valve assembly (A) and comprise module (2) and be installed in first, second, third and fourth bridge electromagnetic valve (3,4,6,7) on the module (2), charge and discharge pneumoelectric magnet valve (5), first, second, third and fourth bridge sensor (16,17,13,10), first, second, third and fourth axle relay valve (23,22,19,18) and overflow shuttle valve (21).
The principle of work of this device is:
1, inflation
1) first bridge inflation
Pressure gas enters the 1st passage (2.1) of module (2) by source of the gas (D) through the straight-through interface (1) of source of the gas air inlet, open and charge and discharge pneumoelectric magnet valve (5), pressure gas flows into the 2nd passage (2.2) from the 1st passage (2.1) through overflow shuttle valve (21) back, open the first bridge electromagnetic valve (3) again, pressure gas is just pushed first axle relay valve (23) open, make pressure gas enter the 3rd passage (2.3) from the 2nd passage (2.2), export by the first bridge ell interface (15) again, entering rotary seal air chamber (H) back flows into automobile tyre valve (F) and automobile tyre valve (F) is opened, afterwards, pressure gas enters the first bridge tire through automobile tyre locking-valve (E), thereby reaches the gas filed purpose of first bridge; Close the first bridge electromagnetic valve (3), the inflation of first bridge stops.
2) first bridge, second bridge, third axle, the 4th bridge are identical with the complete gas filed principle of car.
2, venting
1) first bridge venting
Carry out first bridge inflation action earlier, make tire and central authorities charge and discharge gas control valve assembly airflow connection.Close the first bridge electromagnetic valve (3) more immediately and charge and discharge pneumoelectric magnet valve (5), and then open the first bridge electromagnetic valve (3), gas flows out through automobile tyre locking-valve (E), automobile tyre valve (F), the first bridge ell interface (15), the 3rd passage (2.3), the 2nd passage (2.2), overflow shuttle valve (21) successively in the first bridge tire, thereby reach the purpose of first bridge venting, close the first bridge electromagnetic valve (3), the venting of first bridge stops.
2) first bridge, second bridge, third axle, the 4th bridge are identical with the principle of full car venting.
3, pressure measurement
1) the first bridge pressure measurement
Carry out first bridge inflation action earlier, make tire and central authorities charge and discharge gas control valve assembly airflow connection.Close the first bridge electromagnetic valve (3) more immediately and charge and discharge pneumoelectric magnet valve (5), tire pressure can be reflected on the control panel (25.1) by the first bridge baroceptor (16), thereby reaches the purpose of the first bridge pressure measurement.
2) first bridge, second bridge, third axle, the 4th bridge are identical with the principle of full car pressure measurement.
4, pressurize
1) the first bridge pressurize
Carry out first bridge inflation action earlier, make tire and central authorities charge and discharge gas control valve assembly airflow connection.Close the first bridge electromagnetic valve (3) more immediately and charge and discharge pneumoelectric magnet valve (5), close it immediately after then opening pressure-releasing electromagnetic valve (G), thereby reach the purpose of the first bridge pressurize.
2) first bridge, second bridge, third axle, the 4th bridge are identical with the principle of full car pressurize.
Two, medelling cross-country vehicle tire central authorities charge and discharge gas control system method (abbreviation this method)
1, SCM program design
Micro controller system (25.2) the employing method of calculation of this controller (B) is determined the relation between pressure and voltage.Method of calculation is the functional relation V=f (P) that at first determines pressure and voltage, (generally adopts linear relationship: V=a*P+b).Calculate corresponding pressure according to different potentiometers then.The advantage of this mode is need not that each magnitude of voltage is all done experiment and draws force value, only needs to determine that an electrical voltage point gets final product.
2, control flow
As Fig. 8, control flow is followed successively by:
Beginning (A), initial configuration (B) by ADC gaging pressure voltage (C), calculates atmospheric pressure value (D), judges whether to reach regulation atmospheric pressure value (E);
As satisfying regulation atmospheric pressure value (E), then carry out " pressurize " operation (F);
As less than regulation atmospheric pressure value (E), then carry out " inflation " operation (G), by ADC gaging pressure voltage (H), calculate atmospheric pressure value (I), reach regulation air pressure (J); As reach regulation air pressure (J), then carry out " pressurize " operation (K); As less than regulation atmospheric pressure value (J), return execution " inflation " operation (G) again;
As greater than regulation atmospheric pressure value (E), then carry out " venting " operation (L), by ADC gaging pressure voltage (M), calculate atmospheric pressure value (N), reach regulation atmospheric pressure value (O); As reach regulation atmospheric pressure value (O), then carry out " pressurize " operation (P); As greater than regulation atmospheric pressure value (O), return execution " inflation " operation (L) again.
Specifically:
Beginning (A) is carried out initial configuration (B) to micro controller system then, comprises port, clock etc.; Enter normal operation then.At first by ADC gaging pressure voltage (C), calculate concrete force value (D) according to corresponding pressure and voltage corresponding relation then, judge by comparing tire is carried out " pressurize " operation (F) or carried out " inflation " operation (G) or execution " venting " operation (L) with the atmospheric pressure value of stipulating.As carrying out " inflation " operation (G), in gas replenishment process, pass through ADC gaging pressure voltage (H), calculate concrete atmospheric pressure value (I) according to corresponding pressure and voltage corresponding relation again then, judge that by comparing tire is carried out " pressurize " to be operated (F) or carry out " inflation " operation (G), reaches the regulation atmospheric pressure value until tire pressure with the atmospheric pressure value of regulation; As carrying out " venting " operation (L), in deflation course, pass through ADC gaging pressure voltage (M), calculate concrete atmospheric pressure value (N) according to corresponding pressure and voltage corresponding relation again then, judge that by comparing tire is carried out " pressurize " to be operated (P) or carry out " venting " operation (L), reaches the regulation atmospheric pressure value until tire pressure with the atmospheric pressure value of regulation.
The utlity model has following advantage and good effect:
1, adopt the medelling control method, chaufeur can be realized control to tire pressure by selecting button on the control panel;
2, adopt the medelling control method, the air pressure of each bridge tire is presented on the control panel intuitively, makes things convenient for the control of chaufeur to tire pressure;
3, adopt the medelling structure, can be according to the control unit on the vehicle axle quantity increase and decrease module, to be adapted to the needs of each vehicle;
4, each valve is installed on the module, the integrated level height, simple in structure, piping layout is few, can alleviate tare, makes things convenient for installation and maintenance;
5, fast discharge magnet valve (G) and automobile tyre valve (F) are housed in the system, can turn-off the tire air-flow at any time, play the effect of protection tire;
6, manual lock valve (E) is housed on the tire, in the time of can breaking down in system, it does not leak manual-lock with the assurance tire pressure, has guaranteed vehicle safety.
In a word, the utility model is a kind of medelling structure and medelling control method thereof, and performance is good, and is easy to operate, guarantees the safety traffic of automobile under various harsies environment.
Description of drawings
Fig. 1 is this apparatus structure scheme drawing;
Wherein:
A-central authorities charge and discharge the gas control valve assembly; The B-controller; The C-tire;
The D-source of the gas; The E-automobile tyre locking-valve; The F-automobile tyre valve;
The G-pressure-releasing electromagnetic valve; H-rotary seal air chamber; The I-pipeline.
Fig. 2-central authorities charge and discharge gas control valve assembly composition frame chart;
Fig. 3-modular construction figure;
Fig. 4-central authorities charge and discharge gas control valve assembly structure birds-eye view;
Fig. 5-central authorities charge and discharge gas control valve assembly structure upward view;
Fig. 6-control panel front view;
Fig. 7-controller architecture functional block diagram;
Fig. 8-control flow chart.
Wherein:
Interface is led directly in the air inlet of 1-source of the gas; The 2-module;
The 3-first bridge electromagnetic valve; The 4-second bridge electromagnetic valve;
5-charges and discharge the pneumoelectric magnet valve; 6-third axle electromagnetic valve;
7-the 4th bridge electromagnetic valve; 8-seals plug screw;
9-first hexagon socket cap head screw; 10-the 4th bridge sensor;
11-the 4th bridge charges and discharge gas right angle interface; The 12-third axle charges and discharge gas right angle interface;
13-third axle sensor; 14-second bridge charges and discharge gas right angle interface;
15-first bridge charges and discharge gas right angle interface; 16-first bridge sensor;
17-second bridge sensor; 18-the 4th axle relay valve;
19-third axle relay valve; 20-second hexagon socket cap head screw;
21-overflow shuttle valve; 22-second axle relay valve;
23-first axle relay valve; 24-the 3rd hexagon socket cap head screw.
(B-controller)
25.1-control panel; 25.2-micro controller system;
25.3-A and D converter (being called for short ADC); 25.4-relay controller;
A～each step of P-control flow.
The specific embodiment
Describe in detail below in conjunction with drawings and Examples:
1, overall
The vehicle bridge number of the cross country car that the utility model relates to comprises Bridge 2,3 bridges and 4 bridges, and modular construction, principle that its central authorities charge and discharge gas control valve assembly (A) are identical; In view of the difference of bridge number, can be designed to by the passage and the valve thereof of increase and decrease on the module that Bridge 2 central authorities charge and discharge the gas control valve assembly, 3 bridge central authorities charge and discharge the gas control valve assembly and 4 bridge central authorities charge and discharge the gas control valve assembly.Above-mentioned assembly is that 4 bridge central authorities charge and discharge the gas control valve assembly.
2, central authorities charge and discharge gas control valve assembly (A)
As Fig. 2,3,4,5, central authorities charge and discharge gas control valve assembly (A) and have declared patent of invention, and its applying date is: on November 6th, 2007; Application number is: 200710053768.5.
3, controller (B)
As Fig. 7, controller (B) is made up of control panel (25.1), micro controller system (25.2), A and D converter (25.3) and relay controller (25.4);
Near its annexation: control panel (25.1) is arranged micro controller system (25.2), A and D converter (25.3), micro controller system (25.2), relay controller (25.4) connect successively, A and D converter (25.3) links to each other by electric wire with first, second, third and fourth bridge sensor (16,17,13,10) respectively, relay controller (25.4) respectively with first, second, third and fourth bridge electromagnetic valve (3,4,6,7), charge and discharge pneumoelectric magnet valve (5) and link to each other by electric wire with pressure-releasing electromagnetic valve (G).
Control panel (25.1) is one and comprises a plurality of buttons, has the operation plate of read-out, belongs to conventional general part, as Fig. 6;
" propons highway 430 " is that the propons air pressure that shows on the read-out reaches state in advance, and wherein " 430 " are that the propons air pressure that last system detects is 430KPa;
" jackshaft highway 430 " is that the jackshaft air pressure that shows on the read-out reaches state in advance, and wherein " 430 " are that the jackshaft air pressure that last system detects is 430KPa;
" back axle highway 425 " is that the propons air pressure that shows on the read-out reaches state in advance, and wherein " 425 " are that the back axle air pressure that last system detects is 425KPa;
" opening " the key effect is to open the control panel power supply;
" pass " key effect is a closing control panel power supply;
The effect of " parameter " key is to be used for the parameter setting;
The effect of " blank " key is after full car air pressure is detected, to carry out pressurize;
" returning " the key effect is in the input command process, not by before " determining " key, cancels previous action;
The effect of " affirmation " key is to determine executive command;
The effect of " propons " key is to switch to preceding bridge mode;
The effect of " jackshaft " key is to switch to middle bridge mode;
The effect of " back axle " key is to switch to the back bridge mode;
" full car " key effect is to switch to full car pattern;
The effect of " highway " key is to switch to the highway pattern;
The effect of " cross-country " key is to switch to cross-country pattern;
" silt snow " key effect is to switch to silt snow pattern;
The effect of " pressure regulation " key is to switch to the pressure regulation pattern, must cooperate " ↑ " and " ↓ " key to use;
The effect of " pressurize " key is to switch to the pressurize pattern;
The effect of " detection " key is to switch to detecting pattern;
The effect of " ↑ " key is to adjust upward numerical value;
The effect of " ↓ " key is to adjust numerical value downwards.
Micro controller system (25.2) is a gauge member, selects the PIC16F877A of Microchip company for use;
A and D converter (25.3) is integrated among the PIC16F877A, and precision is 10;
Relay controller (25.4) is used to drive electromagnetic valve, is general part, selects grand HDF3 type relay for use.
Its principle of work is:
After carrying out a certain operation by control panel (25.1), first, two, three, four bridge sensors (16,17,13,10) earlier pressure is converted into voltage signal and delivers to A and D converter (25.3), A and D converter (25.3) is converted into digital quantity with voltage again, by calculating the atmospheric pressure value that can obtain when front tyre, by with the regulation atmospheric pressure value comparison, micro controller system (25.2) connects relay controller (25.4), make its control first, two, three, four bridge electromagnetic valves (3,4,6,7), charge and discharge the switch of pneumoelectric magnet valve (5) and pressure-releasing electromagnetic valve (G), reach the result who is consistent with this operation.
4, tire (C)
Described tire (C) is the tire that a kind of cross country car is used, and belongs to conventional general part.
5, source of the gas (D)
Described source of the gas (D) is the vehicle-mounted gas feeder of a kind of cross country car, and its effect is the pressurized air that cleaning, drying are provided for automobile, belongs to conventional general part.
6, automobile tyre locking-valve (E)
Described automobile tyre locking-valve (E) has been declared patent of invention, and its applying date is: on October 30th, 2007, application number is: 200710053682.2.
7, automobile tyre valve (F)
Described automobile tyre valve (F) has been declared patent of invention, and its applying date is: on October 30th, 2007, application number is: 200710053683.7.
8, pressure-releasing electromagnetic valve (G)
Described pressure-releasing electromagnetic valve (G) is a kind of 2/2-way solenoid directional control valve, belongs to conventional general part.
9, rotary seal air chamber (H)
Described rotary seal air chamber (H) is a kind ofly to be made up of rotating seal ring, spacer ring washer, is installed between wheel hub and the central siphon or between central siphon and the semiaxis, is used to solve the parts by pressed gas transmission between vehicle bridge and the swivel wheel, belongs to conventional general part.
10, pipeline (I)
Described pipeline (I) is a kind of steel wire establishment flexible pipe that above-mentioned each parts are used that connects, and belongs to conventional general part.
Claims (3)
1, the central air inflation discharging control device of a kind of medelling cross-country vehicle tire is characterized in that:
Comprise that central authorities charge and discharge gas control valve assembly (A), controller (B), tire (C), source of the gas (D), automobile tyre locking-valve (E), automobile tyre valve (F), pressure-releasing electromagnetic valve (G), rotary seal air chamber (H) and pipeline (I);
On first, second, third and fourth bridge of cross country car, be separately installed with tire (C); By pipeline (I), source of the gas (D), central authorities charge and discharge gas control valve assembly (A), pressure-releasing electromagnetic valve (G), rotary seal air chamber (H), automobile tyre valve (F), automobile tyre locking-valve (E), tire (C) and are communicated with successively; Controller (B) charges and discharge gas control valve assembly (A) with central authorities and is connected;
By controller (B), realize tire (C) is charged and discharged the medelling control of gas, pressure measurement, pressurize;
Described central authorities charge and discharge gas control valve assembly (A) and comprise module (2) and be installed in first, second, third and fourth bridge electromagnetic valve (3,4,6,7) on the module (2), charge and discharge pneumoelectric magnet valve (5), first, second, third and fourth bridge sensor (16,17,13,10), first, second, third and fourth axle relay valve (23,22,19,18) and overflow shuttle valve (21).
2, by the central air inflation discharging control device of the described a kind of medelling cross-country vehicle tire of claim 1, it is characterized in that:
Central authorities charge and discharge gas control valve assembly (A) or for Bridge 2 central authorities charge and discharge the gas control valve assembly, or are that 3 bridge central authorities charge and discharge the gas control valve assembly, or are that 4 bridge central authorities charge and discharge the gas control valve assembly.
3, by the central air inflation discharging control device of the described a kind of cross-country vehicle tire of claim 1, it is characterized in that:
Controller (B) is made up of control panel (25.1), micro controller system (25.2), A and D converter (25.3) and relay controller (25.4);
Control panel (25.1) is arranged near micro controller system (25.2), A and D converter (25.3), micro controller system (25.2), relay controller (25.4) connect successively, A and D converter (25.3) links to each other by electric wire with first, second, third and fourth bridge sensor (16,17,13,10) respectively, relay controller (25.4) respectively with first, second, third and fourth bridge electromagnetic valve (3,4,6,7), charge and discharge pneumoelectric magnet valve (5) and link to each other by electric wire with pressure-releasing electromagnetic valve (G).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200880859U CN201136416Y (en) | 2007-11-09 | 2007-11-09 | Modeling central charging and deflating control device for off road vehicle tyres |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200880859U CN201136416Y (en) | 2007-11-09 | 2007-11-09 | Modeling central charging and deflating control device for off road vehicle tyres |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201136416Y true CN201136416Y (en) | 2008-10-22 |
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ID=40037107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200880859U Expired - Lifetime CN201136416Y (en) | 2007-11-09 | 2007-11-09 | Modeling central charging and deflating control device for off road vehicle tyres |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201136416Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104802606A (en) * | 2015-05-21 | 2015-07-29 | 天津市航翔科技发展有限公司 | Civil-military dual use novel central tire inflation/deflation system |
-
2007
- 2007-11-09 CN CNU2007200880859U patent/CN201136416Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104802606A (en) * | 2015-05-21 | 2015-07-29 | 天津市航翔科技发展有限公司 | Civil-military dual use novel central tire inflation/deflation system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081022 |