CN111169452A - Prevent frozen new forms of energy passenger train braking system of main line - Google Patents
Prevent frozen new forms of energy passenger train braking system of main line Download PDFInfo
- Publication number
- CN111169452A CN111169452A CN201811338690.6A CN201811338690A CN111169452A CN 111169452 A CN111169452 A CN 111169452A CN 201811338690 A CN201811338690 A CN 201811338690A CN 111169452 A CN111169452 A CN 111169452A
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- air
- condenser
- dryer
- storage tank
- braking
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- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
- B60T17/004—Draining and drying devices
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/002—Air treatment devices
- B60T17/006—Anti-frost devices
-
- 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
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/06—Applications or arrangements of reservoirs
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to a new energy passenger car braking system for preventing a main pipeline from being frozen, which comprises a VCU vehicle control unit, an air compressor, a condenser, a regenerative air storage tank and a dryer, wherein the VCU vehicle control unit is connected with the air compressor through a CAN control bus and is connected with the condenser through a signal control line, an air outlet of the air compressor is connected with an air inlet joint of the condenser through a radiating copper pipe, the top end of the condenser is connected with the input end of a pressure regulating valve arranged at the bottom of the dryer through a vacuum hose, a first output end of the pressure regulating valve is connected with the regenerative air storage tank through an air pipe, a second output end of the pressure regulating valve is connected with an air storage cylinder through an air pipe, the air storage cylinder is connected with a, and pressure sensors arranged on other gas-using equipment are connected with the VCU vehicle control unit through a signal feedback bus. Compared with the prior art, the invention has the advantages of simple and convenient maintenance, high drainage efficiency, long service life and the like.
Description
Technical Field
The invention relates to a braking system, in particular to a new energy passenger car braking system for preventing a main pipeline from being frozen.
Background
A vehicle brake system refers to a series of special devices that apply a certain force to certain parts of the vehicle (mainly the wheels) so as to apply a certain degree of forced braking thereto. The braking system has the following functions: the running automobile is forced to decelerate or even stop according to the requirement of a driver; stably parking a stopped vehicle under various road conditions (including on a slope); the speed of the vehicle running on the downhill is kept stable. Fuel cell cars can also count as electric cars, but you can fill the cell with fuel in five minutes instead of waiting for several hours to become fully charged. Fuel cell vehicles are also electric vehicles, except that the "battery" is a hydrogen-oxygen hybrid fuel cell. In contrast to conventional chemical cells, fuel cells can be replenished with fuel, typically hydrogen. Some fuel cells can use methane and gasoline as fuel, but are generally limited to industrial fields such as power plants and forklifts.
In recent years, the country encourages the development of new energy automobiles, and strong policy support is given to the development of the new energy automobiles, so that the new energy passenger cars have higher and higher market share. With the continuous adjustment of national policies, pure electric drive application areas in the field of new energy automobiles are more and more extensive, and each bus factory actively pushes the market of northern severe cold weather areas in two years, so that the requirement on the working of each system in the severe cold areas is increased, wherein the largest problem encountered by a brake system in the north is that pipelines in the severe cold areas are frozen, and therefore the new energy automobile brake system suitable for the working conditions of the northern severe cold areas is urgently required to be developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a new energy bus braking system for preventing a main pipeline from being frozen.
The purpose of the invention can be realized by the following technical scheme:
a new energy passenger car braking system for preventing the main pipeline from icing comprises a VCU vehicle control unit, an air compressor, a condenser, a regenerative air storage tank and a dryer, the VCU vehicle controller is connected with the air compressor through a CAN control bus and is connected with the condenser through a signal control line, the air outlet of the air compressor is connected with the air inlet joint of the condenser through a radiating copper pipe, the top end of the condenser is connected with the input end of a pressure regulating valve arranged at the bottom of the dryer through a vacuum hose, the first output end of the pressure regulating valve is connected with the regeneration gas storage tank through a gas pipe, the second output end of the pressure regulating valve is connected with the gas storage tank through the gas pipe, the air cylinder is connected with a differential pneumatic valve through the air pipe, the air cylinder is also connected with other gas equipment through the air pipe, and the pressure sensors arranged on the other gas-using equipment are connected with the VCU vehicle control unit through a signal feedback bus.
Furthermore, the length of the heat dissipation copper pipe is 1500 mm-2000 mm.
Further, a dryer shell container is arranged at the top of the dryer and is in sealing connection with the pressure regulating valve in an integrated forming mode, a molecular sieve is arranged at the top in the dryer shell container, and an organic felt is arranged at the bottom in the dryer shell container.
Further, a pressure sensor is arranged at the top of the regeneration gas storage tank, a water discharge electromagnetic valve is arranged at the bottom of the regeneration gas storage tank, and the regeneration gas storage tank is made of silicon steel or stainless steel.
Furthermore, the VCU vehicle controller is provided with 4 shaping pulse input ports, 4 analog output ports, 10 AD acquisition ports, 1 CAN bus vehicle monitoring port, 5 vehicle CAN communication ports, 2 CANBootLoader program download ports and a display instrument.
Furthermore, the condenser is composed of a horizontal spiral air inlet arranged at the top end of the condenser, a spiral sleeve, a cooling radiator shell, a drainage heater, a drainage action valve core, an operation switch and a thermal power over-current relay.
Furthermore, the rest of the gas equipment comprises a passenger car brake valve, a hand brake release valve, a brake quick release valve, a brake relay valve, a composite brake chamber and a brake gas cylinder with a gas sensor.
Compared with the prior art, the invention has the following advantages:
(1) the VCU vehicle control unit is connected with the air compressor through the CAN control bus and is connected with the condenser through the signal control line, the air outlet of the air compressor is connected with the air inlet joint of the condenser through the heat radiation copper pipe, the top end of the condenser is connected with the input end of the pressure regulating valve arranged at the bottom of the dryer through the vacuum hose, the first output end of the pressure regulating valve is connected with the regeneration air storage tank through the air pipe, the second output end of the pressure regulating valve is connected with the air storage cylinder through the air pipe, the air storage cylinder is connected with the differential pneumatic valve through the air pipe, the air storage cylinder is also connected, the pressure sensors arranged on other gas-using equipment are connected with a VCU vehicle control unit through a signal feedback bus, the air compressor can be protected from being frozen and damaged, accumulated water in the condenser is reduced, and the maintenance cost of the brake part of the new energy bus is reduced.
(2) By adopting the technical scheme that the VCU vehicle controller is provided with 4 shaping pulse input ports, 4 analog output ports, 10 AD acquisition ports, 1 CAN bus vehicle monitoring port, 5 vehicle CAN communication ports, 2 CANBootLoader program downloading ports and a display instrument, the braking system has stronger expansibility, CAN be added with more external auxiliary controls for the braking system, and improves the safety performance of the braking system.
(3) The technical scheme that the top of the regeneration gas storage tank is provided with a pressure sensor, the bottom of the regeneration gas storage tank is provided with a water drainage electromagnetic valve, the regeneration gas storage tank is made of silicon steel or stainless steel, the top of the dryer is provided with a dryer shell container, the dryer shell container is connected with a pressure regulating valve in an integrated and sealed manner, the top of the dryer shell container is provided with a molecular sieve, the bottom of the dryer shell container is provided with an organic felt, the condenser consists of a horizontal spiral air inlet arranged at the top end of the condenser, a spiral sleeve, a cooling radiator shell, a water drainage heater, a water drainage action valve core, an operating switch and a thermal power overcurrent relay, can reduce the fatigue strength of a driver, does not need to deliberately go to frequently brake and drain water, realizes automatic and effective drainage by control, improves the drainage efficiency, ensures the temperature of the air inlet water, cooling, providing braking efficiency, and prolonging the service life of valves of the braking system.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
the reference numbers illustrate:
1 is a VCU integral controller; 2, an air compressor; 3 is a condenser; 4 is a regeneration gas storage tank; 5 is a dryer; 6 is a heat dissipation copper pipe; 7 is a trachea; 8 is a control bus; 9 is a vacuum hose; 10 is CAN signal control bus; and 11 is a signal feedback line.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
Examples
FIG. 1 is a schematic diagram of the overall structure of a new energy passenger car braking system for preventing the main pipeline from freezing, which includes a VCU vehicle controller 1, an air compressor 2, a condenser 3, a regenerative air storage tank 4 and a dryer 5, wherein the VCU vehicle controller 1 is provided with 4 shaping pulse input ports, 4 analog output ports, 10 AD acquisition ports, 1 CAN bus vehicle monitoring port, 5 CAN vehicle communication ports, 2 CANBootLoader program downloading ports and a display instrument, the condenser 3 is composed of a horizontal spiral air inlet, a spiral sleeve, a cooling radiator shell, a drainage heater, a drainage action valve core, an operation switch and a thermal power overcurrent relay which are arranged at the top end of the condenser, the VCU vehicle controller 1 is connected with the air compressor 2 through a CAN control bus 10 and is connected with the condenser 3 through a signal control line 8, an air outlet of the air compressor 2 is connected with an air inlet joint of the condenser 3 through a heat dissipation copper pipe 6, the length of the heat dissipation copper pipe 6 is 1500 mm-2000 mm, generally 1500mm, the top end of the condenser 3 is connected with the input end of a pressure regulating valve arranged at the bottom of the dryer 5 through a vacuum hose 9, the top of the dryer 5 is provided with a dryer shell container, the dryer shell container is connected with the pressure regulating valve in an integrated and sealed manner, the top in the dryer shell container is provided with a molecular sieve, the bottom in the dryer shell container is provided with an organic felt, the first output end of the pressure regulating valve is connected with a regeneration gas storage tank 4 through a gas pipe 7, the second output end of the pressure regulating valve is connected with a gas storage cylinder through the gas pipe 7, the gas storage cylinder is connected with a differential pneumatic valve through the gas pipe 7 and is also connected with other gas equipment through the gas pipe 7, pressure sensors arranged on the other gas equipment are connected with a VCU vehicle control unit 1 through a signal feedback bus 11, the brake system comprises a hand brake release valve, a brake quick release valve, a brake relay valve, a composite brake air chamber and a brake air cylinder with a gas sensor.
The occurrence reason analysis of the main pipeline of the braking system in the severe cold area is as follows:
due to the low ambient temperature, the intake air temperature of the condenser is low, and the cooling of the condenser is added, so that the moisture in the air is rapidly changed from a gaseous state to a liquid state in the condenser and finally condensed into ice. The condenser can efficiently drain water only when the inflating pump works and the brake action (air brake is needed) is carried out at the same time. The working time of the electric inflating pump is short, so that the air entering the condenser is short; in addition, the driver has more electric brakes, so that the condenser can not efficiently drain water, and the water condensed by the condenser can not be timely drained, and can be condensed into ice along the spiral pipeline wall. So for a long time, lead to the helical piping jam, ice progressively extends to the condenser import, and air inlet blocks up at last, leads to inflating pump work load to increase, and the coupling of weakest damages.
From the data of the test result of the fault vehicle, the copper pipe is wrapped, so that the air inlet temperature of the condenser can be effectively improved, and in the half-wrapping process, the air inlet temperature is basically equivalent to that of the vehicle in the same industry; the full package effect is best. The combination of the use frequency of vehicle braking and the ambient temperature can solve the problems that firstly, the temperature of an air inlet of the condenser is improved, secondly, accumulated water in the condenser is reduced, and water is drained in time; firstly, the copper pipe is wrapped, so that the condition that air inlet of the condenser is improved and icing is improved, and the arrangement position cannot be changed temporarily according to the requirement that the condenser of a customer is arranged at the position outside a vehicle for convenient maintenance; secondly through adjustment control strategy, reduce ponding, improve the operating time of pump of inflating and improve the drainage efficiency of condenser, the jam that freezes that can be better like this.
The brake control strategy idea of the new energy bus corresponding to the invention is as follows:
in order to protect the over-pressure work of the air compressor and reduce the accumulated water, an improvement test is proposed in the two aspects of mechanical protection and arrangement position, meanwhile, the chassis puts forward the requirement of increasing the drainage times to reduce the accumulated water of the condenser, so the requirement of increasing the drainage times is met in the aspect of control strategy, and finally the following five aspects are considered, and the designed improvement solution is proposed:
1. mechanical overvoltage protection: for the locked-rotor protection, a mechanical safety valve is added in series between the air outlet of the air compressor and the main pipeline of the braking system, and an overvoltage working protection rectification scheme is added.
2. Vehicle arrangement position: the condenser is arranged to move near the air compressor, the length of the air outlet copper pipe is controlled to be about 1500-2000 mm, the temperature of the air inlet is improved, and the testing effect is achieved.
3. Control strategy aspect (hardware function): the VCU can control the air compressor to start working every time, and in the process of inflating from 0.68 to 1.0MPa, the VCU can control exhaust twice according to the pressure value of the air storage cylinder fed back by the instrument, and when the pressure value is 0.9MPa and 0.95MPa, the VCU directly controls the output signal line of the condenser to finish the actions.
4. Control strategy aspect (software function): the VCU detects the continuous working time of the inflating pump, stops working and gives an alarm when the continuous working time exceeds 10 minutes, so that the condition of air leakage of a pipeline is prevented, and the air compressor works and inflates all the time to protect the air compressor. The strategy of linkage work of the inflating pump and the condenser is adopted, the condenser can drain water when the work of the inflating pump is finished, the linkage function of a manual valve is added, the inflating is forced when the hand brake is pulled up and the air pressure of the air storage barrel is lower than 0.85MPa, and the working frequency of the inflating pump is improved;
5. the electric appliance increases power: the condenser is heated below 5 ℃, a temperature switch is triggered, a key is turned ON to start heating, and the heating power is increased to 10W.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A new energy bus braking system for preventing a main pipeline from being frozen is characterized by comprising a VCU (vehicle control unit) (1), an air compressor (2), a condenser (3), a regenerative air storage tank (4) and a dryer (5), wherein the VCU (vehicle control unit) (1) is connected with the air compressor (2) through a CAN (controller area network) control bus (10) and is connected with the condenser (3) through a signal control line (8), an air outlet of the air compressor (2) is connected with an air inlet joint of the condenser (3) through a heat dissipation copper pipe (6), the top end of the condenser (3) is connected with an input end of a pressure regulating valve arranged at the bottom of the dryer (5) through a vacuum hose (9), a first output end of the pressure regulating valve is connected with the regenerative air storage tank (4) through an air pipe (7), and a second output end of the pressure regulating valve is connected with an air storage tank through the air pipe (, the air storage cylinder is connected with a differential pneumatic valve through the air pipe (7), the air storage cylinder is further connected with other air equipment through the air pipe (7), and pressure sensors arranged on the other air equipment are connected with the VCU vehicle control unit (1) through a signal feedback bus (11).
2. The new-energy passenger car braking system for preventing the main pipeline from being frozen according to claim 1, wherein the length of the heat dissipation copper pipe (6) is 1500-2000 mm.
3. The new energy passenger car braking system for preventing the main pipeline from being frozen according to claim 1, wherein a dryer shell container is arranged at the top of the dryer (5), the dryer shell container is connected with the pressure regulating valve in an integrally formed and sealed mode, a molecular sieve is arranged at the top in the dryer shell container, and an organic felt is arranged at the bottom in the dryer shell container.
4. The system for braking a new-energy passenger car to prevent the main pipeline from being frozen according to claim 1, wherein a pressure sensor is arranged at the top of the regenerative air storage tank (4), a water discharge solenoid valve is arranged at the bottom of the regenerative air storage tank, and the regenerative air storage tank (4) is made of silicon steel or stainless steel.
5. The system of claim 1, wherein the VCU vehicle controller (1) is provided with 4 shaping pulse input ports, 4 analog output ports, 10 AD acquisition ports, 1 CAN bus vehicle monitoring port, 5 vehicle CAN communication ports, 2 CANBootLoader program download ports, and a display instrument.
6. The new-energy passenger car braking system for preventing the main pipeline from being frozen as claimed in claim 1, wherein the condenser (3) is composed of a horizontal spiral air inlet, a spiral sleeve, a cooling radiator shell, a drainage heater, a drainage action valve core, an operation switch and a thermal power over-current relay which are arranged at the top end of the condenser.
7. The new-energy bus braking system for preventing the main pipeline from being frozen as claimed in claim 1, wherein the rest of the gas-using equipment comprises a bus braking valve, a hand braking release valve, a braking quick release valve, a braking relay valve, a composite braking air chamber and a braking air cylinder with a gas sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338690.6A CN111169452A (en) | 2018-11-12 | 2018-11-12 | Prevent frozen new forms of energy passenger train braking system of main line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338690.6A CN111169452A (en) | 2018-11-12 | 2018-11-12 | Prevent frozen new forms of energy passenger train braking system of main line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111169452A true CN111169452A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811338690.6A Pending CN111169452A (en) | 2018-11-12 | 2018-11-12 | Prevent frozen new forms of energy passenger train braking system of main line |
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| Country | Link |
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| CN (1) | CN111169452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113511178A (en) * | 2021-04-28 | 2021-10-19 | 瑞安市宇天汽车部件有限公司 | Intelligent brake air management system |
| CN114194168A (en) * | 2022-01-06 | 2022-03-18 | 江苏大学 | All-condition commercial vehicle braking auxiliary safety system and control method thereof |
-
2018
- 2018-11-12 CN CN201811338690.6A patent/CN111169452A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113511178A (en) * | 2021-04-28 | 2021-10-19 | 瑞安市宇天汽车部件有限公司 | Intelligent brake air management system |
| CN114194168A (en) * | 2022-01-06 | 2022-03-18 | 江苏大学 | All-condition commercial vehicle braking auxiliary safety system and control method thereof |
| CN114194168B (en) * | 2022-01-06 | 2023-11-10 | 江苏大学 | Full-working-condition commercial vehicle braking auxiliary safety system and control method thereof |
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