CN112550260A - Control method and system for compressed air and new energy automobile - Google Patents
Control method and system for compressed air and new energy automobile Download PDFInfo
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- CN112550260A CN112550260A CN202011594235.XA CN202011594235A CN112550260A CN 112550260 A CN112550260 A CN 112550260A CN 202011594235 A CN202011594235 A CN 202011594235A CN 112550260 A CN112550260 A CN 112550260A
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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
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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
- 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
- B60T13/26—Compressed-air systems
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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
- B60T17/02—Arrangements of pumps or compressors, or control devices therefor
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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
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The utility model provides a control system, method and new energy automobile of compressed air relates to new energy automobile technical field, the system includes desicator, second baroceptor and second controller. The dryer includes: a first air pressure sensor configured to detect a first pressure of a passage between the electric air compressor and the at least one air reservoir; and a first controller electrically connected to the first pressure sensor and configured to output a control signal corresponding to the first pressure. A second air pressure sensor configured to detect a second pressure of a passage between the electric air compressor and the at least one air tank. The second controller is electrically connected with the first controller and the second air pressure sensor and is configured to control the electric air compressor to start or stop according to the control signal under the condition of receiving the control signal; and under the condition that the second pressure is not in the preset range and the control signal is not received, controlling the electric air compressor to start or stop according to the second pressure.
Description
Technical Field
The disclosure relates to the technical field of new energy vehicles, in particular to a control method and system for compressed air and a new energy vehicle.
Background
In a vehicle having an electronically controlled dryer, the electronically controlled dryer can achieve unloading, regeneration, and air supply. The electronically controlled dryer may malfunction during actual use of the vehicle due to reliability problems of electrical components in the electronically controlled dryer.
Disclosure of Invention
The inventor notices that once the electric control dryer breaks down, the electric air compressor can not supply air to the brake system, so that the brake system can not be normally used. At the moment, the vehicle can only be parked on site, and the normal use of the vehicle is greatly influenced.
In order to solve the above problem, the embodiments of the present disclosure provide the following technical solutions.
According to an aspect of an embodiment of the present disclosure, there is provided a control system of compressed air, including: a dryer, comprising: a first air pressure sensor configured to detect a first pressure of a passage between the electric air compressor and the at least one air reservoir; and a first controller electrically connected to the first air pressure sensor and configured to output a control signal corresponding to the first pressure; a second air pressure sensor configured to detect a second pressure of a passage between the electric air compressor and the at least one air cylinder; the second controller is electrically connected with the first controller and the second air pressure sensor and is configured to control the electric air compressor to start or stop according to the control signal under the condition of receiving the control signal; and under the condition that the second pressure is not in a preset range and the control signal is not received, controlling the electric air compressor to start or stop according to the second pressure.
In some embodiments, the control signal comprises a first control signal and a second control signal; the first controller is configured to output the first control signal if the first pressure is greater than or equal to a first preset pressure; outputting the second control signal when the first pressure is less than or equal to a second preset pressure, wherein the second preset pressure is less than the first preset pressure; the second controller is configured to control the electric air compressor to stop under the condition of receiving the first control signal; and controlling the electric air compressor to start under the condition of receiving the second control signal.
In some embodiments, the upper limit of the preset range is a third preset pressure greater than the first preset pressure, and the lower limit of the preset range is a fourth preset pressure less than the second preset pressure; the second controller is also configured to control the electric air compressor to start or stop according to the second pressure when the second pressure is greater than or equal to the third preset pressure and the first control signal is not received; and under the condition that the second pressure is less than or equal to the fourth preset pressure and the second control signal is not received, controlling the electric air compressor to start or stop according to the second pressure.
In some embodiments, the controlling the electric air compressor to start or stop according to the second pressure includes: controlling the electric air compressor to stop under the condition that the second pressure is greater than or equal to a fifth preset pressure; and controlling the electric air compressor to start under the condition that the second pressure is less than or equal to a sixth preset pressure.
In some embodiments, the second air pressure sensor is disposed on a path between the dryer and the at least one air reservoir.
In some embodiments, the second air pressure sensor is disposed on the at least one air reservoir.
In some embodiments, the at least one air reservoir comprises a plurality of air reservoirs, the second air pressure sensor comprises a plurality of second air pressure sensors, and different second air pressure sensors are disposed on different air reservoirs.
In some embodiments, the second pressure comprises a plurality of second pressures; the second controller is configured to control the electric air compressor to start or stop according to a maximum value in the plurality of second pressures when the maximum value is not in the preset range and the control signal is not received.
In some embodiments, the dryer further comprises: a first port of the filter screen is communicated with the electric air compressor through a first port of the dryer; a one-way valve, a first port of the one-way valve being in communication with a second port of the filter screen, the second port of the one-way valve being in communication with the at least one air reservoir via a second port of the dryer; a first solenoid valve, wherein a first port of the first solenoid valve is communicated with a second port of the filter screen, a second port of the first solenoid valve is communicated with a second port of the one-way valve and the second interface, and a control port of the first solenoid valve is electrically connected with the first controller; a first port of the exhaust valve is communicated with the first port and the first port of the filter screen, and a second port of the exhaust valve is communicated with the third port of the dryer; a second solenoid valve, a first port of the second solenoid valve being in communication with a second port of the first solenoid valve and the second interface, a second port of the second solenoid valve being in communication with a control port of the exhaust valve, a control port of the second solenoid valve being electrically connected to the first controller; the first port of the third electromagnetic valve is communicated with the second port of the second electromagnetic valve and the control port of the exhaust valve, the second port of the third electromagnetic valve is communicated with the fourth interface of the dryer, and the control port of the third electromagnetic valve is electrically connected with the first controller; the first controller is further configured to control the first port and the second port of the second solenoid valve to communicate for a first preset time period to communicate the first port and the second port of the exhaust valve and to control the first port and the second port of the first solenoid valve to communicate for a second preset time period including a sub-time period after the first preset time period, in a case where the first pressure is greater than or equal to the first preset pressure; and under the condition that the first pressure is smaller than or equal to the second preset pressure, controlling the first port and the second port of the third electromagnetic valve to be communicated within a third preset time period so that the first port and the second port of the exhaust valve are not communicated, wherein the third preset time period is after the second preset time period.
In some embodiments, the dryer further comprises: and the safety valve is arranged between the first interface and the fifth interface of the dryer.
In some embodiments, the filter screen comprises: a first filter screen disposed between the first port of the one-way valve and the first interface, and between the first port of the one-way valve and the first port of the vent valve, configured to filter one of water and oil; and a second filter screen disposed between the first filter screen and the first port, and between the first filter screen and the first port of the exhaust valve, configured to filter the other of water and oil.
In some embodiments, a protection valve is disposed between the dryer and the at least one air reservoir.
In some embodiments, the second barometric pressure sensor is further configured to transmit the detected second pressure to a display device for display.
According to another aspect of the embodiments of the present disclosure, there is provided a new energy vehicle including: the control system for compressed air according to any of the above embodiments.
According to still another aspect of the embodiments of the present disclosure, there is provided a control method of compressed air, including: a first air pressure sensor in a dryer detects a first pressure of a passage between an electric air compressor and the at least one air reservoir, the dryer being disposed between the electric air compressor and the at least one air reservoir; a first controller in the dryer outputs a control signal corresponding to the first pressure; a second air pressure sensor detects a second pressure of a passage between the electric air compressor and the at least one air reservoir; the second controller controls the electric air compressor to start or stop according to the control signal under the condition of receiving the control signal; and the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is not in a preset range and the control signal is not received.
In some embodiments, the control signal comprises a first control signal and a second control signal; the first controller outputting a control signal corresponding to the first pressure includes: the first controller outputs the first control signal when the first pressure is greater than or equal to a first preset pressure; the first controller outputs the second control signal when the first pressure is smaller than or equal to a second preset pressure, wherein the second preset pressure is smaller than the first preset pressure; the second controller controls the electric air compressor to start or stop according to the control signal under the condition that the second controller receives the control signal, and the second controller comprises: the second controller controls the electric air compressor to stop under the condition of receiving the first control signal; and the second controller controls the electric air compressor to start under the condition of receiving the second control signal.
In some embodiments, the upper limit of the preset range is a third preset pressure greater than the first preset pressure, and the lower limit of the preset range is a fourth preset pressure less than the second preset pressure; the second controller controls the electric air compressor to start or stop according to the second pressure under the condition that the second pressure is not in a preset range and the control signal is not received, and the second controller comprises: the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is greater than or equal to the third preset pressure and the first control signal is not received; and the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is less than or equal to the fourth preset pressure and the second control signal is not received.
In some embodiments, the controlling the electric air compressor to start or stop according to the second pressure includes: controlling the electric air compressor to stop under the condition that the second pressure is greater than or equal to a fifth preset pressure; and controlling the electric air compressor to start under the condition that the second pressure is less than or equal to a sixth preset pressure.
In some embodiments, the dryer further comprises: a first port of the filter screen is communicated with the electric air compressor through a first port of the dryer; a one-way valve, a first port of the one-way valve being in communication with a second port of the filter screen, the second port of the one-way valve being in communication with the at least one air reservoir via a second port of the dryer; a first solenoid valve, wherein a first port of the first solenoid valve is communicated with a second port of the filter screen, a second port of the first solenoid valve is communicated with a second port of the one-way valve and the second interface, and a control port of the first solenoid valve is electrically connected with the first controller; a first port of the exhaust valve is communicated with the first port and the first port of the filter screen, and a second port of the exhaust valve is communicated with the third port of the dryer; a second solenoid valve, a first port of the second solenoid valve being in communication with a second port of the first solenoid valve and the second interface, a second port of the second solenoid valve being in communication with a control port of the exhaust valve; a third solenoid valve, a first port of the third solenoid valve being in communication with a second port of the second solenoid valve and a control port of the exhaust valve, a second port of the third solenoid valve being in communication with a fourth port of the dryer; the method further comprises the following steps: the first controller controls the first port and the second port of the second solenoid valve to communicate within a first preset time period so that the first port and the second port of the exhaust valve communicate, and controls the first port and the second port of the first solenoid valve to communicate within a second preset time period including a sub-time period after the first preset time period, in a case where the first pressure is greater than or equal to the first preset pressure; the first controller controls the first port and the second port of the third solenoid valve to be communicated within a third preset time period after the second preset time period so that the first port and the second port of the exhaust valve are not communicated when the first pressure is less than or equal to the second preset pressure.
The control system of compressed air provided by the embodiment of the disclosure comprises a first air pressure sensor positioned in the dryer and a second air pressure sensor positioned outside the dryer. The second controller controls the electric air compressor to start or stop according to a control signal which is output by the first controller and corresponds to the first pressure detected by the first air pressure sensor and the second pressure detected by the second air pressure sensor. In such a way, under the condition that the dryer has a fault, the electric air compressor can still be controlled to start or stop so that the vehicle can still run normally, and the reliability of a control system for compressing air and the running safety of the vehicle are improved.
Other features, aspects, and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments thereof, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:
FIG. 1 is a block diagram illustrating a control system for compressing air according to some embodiments of the present disclosure;
fig. 2 is a flow diagram illustrating a control method of compressing air according to some embodiments of the present disclosure.
It should be understood that the dimensions of the various parts shown in the figures are not necessarily drawn to scale. Further, the same or similar reference numerals denote the same or similar components.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be intervening components between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without having an intervening component, or may be directly connected to the other components without having an intervening component.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
Fig. 1 is a schematic diagram illustrating a control system for compressing air according to some embodiments of the present disclosure.
As shown in fig. 1, the control system of the compressed air may include a dryer 11, a second air pressure sensor 12, and a second controller 13.
The dryer 11 includes a first air pressure sensor 111 and a first controller 112. The first air pressure sensor 111 is configured to detect a first pressure of a passage between the electric air compressor 21 and the at least one air tank 22.
In some embodiments, a protection valve 23 may be provided between the dryer 11 and the at least one air reservoir 22. For example, fig. 1 schematically shows 4 air reservoirs 22. In this case, the protection valve 23 may be a four-circuit protection valve, for example, which may include a first circuit 231, a second circuit 232, a third circuit 234, and a fourth circuit 235. The dryer 11 communicates with a corresponding one of the air cylinders 22 via each circuit. In addition, fig. 1 also schematically shows a water discharge valve 221 of the air reservoir 22.
The first controller 112 is electrically connected to the first air pressure sensor 111, and is configured to output a control signal corresponding to the first pressure detected by the first air pressure sensor 111. For example, the first controller 112 outputs a control signal via the output terminal OUT. As an example, the first controller 112 may be an Electronic Control Unit (ECU). In some embodiments, the first controller 112 may alert a user, such as by way of an alarm light or the like, to replace the dryer 11 in the event of a failure of the dryer 11.
The second air pressure sensor 12 is configured to detect a second pressure of a passage between the electric air compressor 21 and the at least one air tank 22. In some embodiments, the second barometric pressure sensor 12 is further configured to send the detected second pressure to a display device (e.g., a dashboard of the vehicle) for display.
For example, the second air pressure sensor 12 may be provided on a passage between the electric air compressor 21 and the dryer 11. For another example, the second air pressure sensor 12 may be disposed on a path between the dryer 11 and the air reservoir 22 to avoid inaccurate pressure detected by the second air pressure sensor 12 due to the second air pressure sensor 12 being too close to the electric air compressor 21. It is to be understood that the passage provided between the dryer 11 and the air cylinder 22 includes the case provided on the air cylinder 22. In some embodiments, a second air pressure sensor 12 may be provided on the air reservoir 22 to more accurately detect the pressure provided to the brake system.
The second controller 13 is electrically connected to the first controller 112 and the second air pressure sensor 12. The second controller 13 is configured to control the electric air compressor 21 to start or stop according to the control signal output from the first controller 112 in case of receiving the control signal output from the first controller 112. The second controller 13 is further configured to control the electric air compressor 21 to start or stop according to the second pressure detected by the second air pressure sensor 12 when the second pressure detected by the second air pressure sensor 12 is not within the preset range and the control signal output by the first controller 112 is not received.
Fig. 1 also schematically shows an input terminal IN of the first controller for receiving an input signal, spare signal terminals TX and RX, and a power supply 24 for supplying power to the first controller 112.
In the above embodiment, the control system of the compressed air includes the first air pressure sensor 111 located in the dryer 11 and the second air pressure sensor 12 located outside the dryer 11. The second controller 13 controls the electric air compressor 21 to start or stop according to the control signal corresponding to the first pressure detected by the first air pressure sensor 111 and the second pressure detected by the second air pressure sensor 12, which are output by the first controller 112. In this way, in the case of a failure of the dryer 11, the electric air compressor 21 can still be controlled to start or stop, so that the vehicle can still run normally, and the reliability of the compressed air control system and the running safety of the vehicle are improved.
In some embodiments, the control system for compressed air includes a plurality of second air pressure sensors 12, and different second air pressure sensors 12 may be disposed on different air reservoirs 22. In this case, for example, the second controller 13 may control the electric air compressor 21 to start or stop according to the second pressure detected by one second air pressure sensor 12 of the plurality of second air pressure sensors 12, and the second pressure detected by the other second air pressure sensors 12 may be in standby.
In some embodiments, it may be determined which of the second pressures detected by the second air pressure sensors 12 controls the electric air compressor 21 to be started or stopped according to a plurality of second pressures detected by two or more of the second controllers 13 of the second air pressure sensors 12. For example, the electric air compressor 21 may be controlled to start or stop according to a maximum value of the plurality of second pressures, so as to better ensure the safety of the vehicle running.
Some implementations in which the second controller 13 controls the electric air compressor 21 to start or stop will be described below. In these implementations, the control signal includes a first control signal and a second control signal. For example, the first control signal is a low level signal, such as 0V; the second control signal is a high level signal, for example, 24V.
The first controller 112 is configured to output a first control signal in a case where the first pressure detected by the first air pressure sensor 111 is greater than or equal to a first preset pressure; and outputting a second control signal under the condition that the first pressure is less than or equal to a second preset pressure, wherein the second preset pressure is less than the first preset pressure. As an example, the first preset pressure is 1Mpa and the second preset pressure is 0.8 Mpa.
Accordingly, the second controller 13 is configured to control the electric air compressor 21 to stop in case of receiving the first control signal; and controlling the electric air compressor 21 to start under the condition of receiving the second control signal.
Other implementations in which the second controller 13 controls the electric air compressor 21 to start or stop will be described. In these implementations, the upper limit of the preset range is a third preset pressure, and the lower limit of the preset range is a fourth preset pressure.
For example, the second controller 13 is configured to control the electric air compressor 21 to start or stop according to the second pressure detected by the second air pressure sensor 12 when the second pressure detected by the second air pressure sensor 12 is greater than or equal to the third preset pressure and the first control signal output by the first controller 112 is not received.
In the case where the second pressure is greater than or equal to the third preset pressure and the first control signal is not received, it may be considered that the dryer 11 is out of order. For example, when the second pressure is greater than or equal to the third preset pressure and the second control signal output by the first controller 112 is received, the dryer 11 may be considered to be malfunctioning.
For another example, the second controller 13 is further configured to control the electric air compressor 21 to start or stop according to the second pressure detected by the second air pressure sensor 12 when the second pressure detected by the second air pressure sensor 12 is less than or equal to the fourth preset pressure and the second control signal output by the first controller 112 is not received.
In the case where the second pressure is less than or equal to the fourth preset pressure and the second control signal is not received, it may be considered that the dryer 11 is out of order. For example, when the second pressure is less than or equal to the fourth preset pressure and the first control signal output from the first controller 112 is received, it may be considered that the dryer 11 is out of order.
In some embodiments, the third predetermined pressure is greater than the first predetermined pressure and the fourth predetermined pressure is less than the second predetermined pressure. As an example, the third preset pressure is 1.1Mpa and the fourth preset pressure is 0.7 Mpa.
In this way, on the one hand, it is ensured that the electric air compressor 21 is controlled to start or stop according to the second pressure only in case of a failure of the dryer 11; on the other hand, in the case where the display device displays the second pressure detected by the second air pressure sensor 12, the user may be prompted that there is a possible problem with the vehicle at present, so that the user can check parking in time.
Some implementations in which the second controller 13 controls the electric air compressor 21 to start or stop according to the second pressure detected by the second air pressure sensor 12 will be described below.
The second controller 13 is configured to control the electric air compressor 21 to stop in a case where the second pressure detected by the second air pressure sensor 12 is greater than or equal to a fifth preset pressure; and controlling the electric air compressor 21 to start under the condition that the second pressure detected by the second air pressure sensor 12 is less than or equal to the sixth preset pressure.
Some specific implementations of the dryer 11 are described below in conjunction with fig. 1.
As shown in fig. 1, in some embodiments, the dryer 11 may include a filter screen 113, a check valve 114, a first solenoid valve 115, a second solenoid valve 116, a third solenoid valve 117, and an exhaust valve 118, in addition to the first air pressure sensor 111 and the first controller 112.
The first port of the filter screen 113 communicates with the electric air compressor 21 via the first port P1 of the dryer 11. For example, the filter screen 113 may be used to filter water and oil. For example, the filter screens 113 include a first filter screen 1131 configured to filter one of water and oil and a second filter screen 1132 configured to filter the other of water and oil. For example, second filter sieve 1132 is a molecular sieve. A first filter screen 1131 is disposed between the first port of the check valve 114 and the first port P1, and between the first port of the check valve 114 and the first port of the bleed valve 118. The second filter screen 1132 is disposed between the first filter screen 1131 and the first port P1, and between the first filter screen 1131 and the first port of the exhaust valve 118. Where filter screen 113 includes a first filter screen 1131 and a second filter screen 1132, the first port of filter screen 113 may be understood as the first port of second filter screen 1132 and the second port of filter screen 113 may be understood as the second port of first filter screen 1131.
The first port of the check valve 114 communicates with the second port of the filter sieve 113, and the second port of the check valve 114 communicates with the at least one air receiver 22 via the second port P2 of the dryer 11. It will be appreciated that gas passing through the filter screen 113 flows sequentially through the first and second ports of the check valve 114 to the second port P2, whereas gas from the second port P2 cannot flow from the second port to the first port of the check valve 114.
A first port of the first solenoid valve 115 communicates with a second port of the filter screen 113, a second port of the first solenoid valve 115 communicates with a second port of the check valve 114 and the second port P2, and a control port of the first solenoid valve 115 is electrically connected with the first controller 112. The first controller 112 may control whether the first port and the second port of the first solenoid valve 115 communicate.
A first port of the exhaust valve 118 communicates with the first port P1 and a first port of the filter screen 113, and a second port of the exhaust valve 118 communicates with the third port P3 of the dryer 11. With the first and second ports of the exhaust valve 118 in communication, gas may flow through the exhaust valve 118 to the third port P3.
The first port of the second solenoid valve 116 communicates with the second port of the first solenoid valve 115 and the second port P2, the second port of the second solenoid valve 116 communicates with the control port of the exhaust valve 118, and the control port of the second solenoid valve 116 is electrically connected to the first controller 112. The first controller 112 may control whether the first and second ports of the second solenoid valve 116 communicate.
The first port of the third solenoid valve 117 communicates with the second port of the second solenoid valve 116 and the control port of the exhaust valve 118, the second port of the third solenoid valve 117 communicates with the fourth port P4 of the dryer 11, and the control port of the third solenoid valve 117 is electrically connected to the first controller 112. The first controller 112 may control whether the first port and the second port of the third solenoid valve 117 communicate.
Some implementations of the first controller 112 controlling three solenoid valves are described below.
The first controller 112 is configured to control the first port and the second port of the second solenoid valve 116 to communicate for a first preset time period (e.g., 2 seconds) to communicate the first port and the second port of the exhaust valve 118 and the first port and the second port of the first solenoid valve 115 to communicate for a second preset time period (e.g., 8 seconds) in a case where the first pressure detected by the first air pressure sensor 111 is greater than or equal to the first preset pressure.
Here, the second preset time period includes a sub-time period after the first preset time period. For example, the second preset time period is entirely after the first preset time period; for another example, the second preset time period includes the first preset time period and a sub-time period after the first preset time period.
It will be appreciated that, for example, outside a first preset time period, the first and second ports of the first solenoid valve 115 are controlled to be not open; for example, outside of a second preset period of time, the first and second ports of the second solenoid valve 116 are controlled to be not open.
In this manner, during the first preset period of time, the gas in the air reservoir 22 may sequentially flow through the first port and the second port of the second solenoid valve 116 to the control port of the exhaust valve 118, so that the exhaust valve 118 is opened, i.e., the first port and the second port of the exhaust valve 118 are communicated. In a second preset time period, the gas in the air receiver 22 may sequentially flow to the filter sieve 113 through the first port and the second port of the first solenoid valve 115, so that the water and the oil in the filter sieve 113 are discharged through the exhaust valve 118, and the regeneration function of the filter sieve 113 is realized.
The first controller 112 is further configured to control the first port and the second port of the third solenoid valve 117 to communicate for a third preset time period such that the first port and the second port of the exhaust valve 118 do not communicate, in a case where the first pressure detected by the first air pressure sensor 111 is less than or equal to a second preset pressure. Here, the third preset time period is after the second preset time period.
In this way, the exhaust valve 118 can be closed, and after the electric air compressor 21 is started, air can enter the air reservoir 22 through the dryer 11 and the protection valve 23 to supply air to the brake system.
In some embodiments, referring to fig. 1, the dryer 11 further includes a relief valve 119 disposed between the first port P1 and a fifth port P5 of the dryer 11. The relief valve 119 ensures that the system pressure does not rise indefinitely in the event of a functional failure of the electronically controlled dryer.
In some embodiments, referring to fig. 1, the dryer 11 further includes a heater 120 disposed around the passage between the first port P1 and the filter screen 113 to prevent freezing of the water and oil returned by the filter screen 113 in the line. For example, the first controller 112 may control whether the heater 120 is operated.
The embodiment of the present disclosure further provides a new energy automobile, including: the control system for compressed air of any of the above embodiments. For example, the new energy automobile may be a car, a truck, or the like.
Fig. 2 is a flow diagram illustrating a control method of compressing air according to some embodiments of the present disclosure.
At step 202, a first pressure sensor in the dryer detects a first pressure of a passage between the electric air compressor and the at least one air reservoir. Here, the dryer is disposed between the electric air compressor and the at least one air reservoir.
In step 204, a first controller in the dryer outputs a control signal corresponding to a first pressure.
In some embodiments, the control signal includes a first control signal and a second control signal. Under the condition that the first pressure is greater than or equal to a first preset pressure, outputting a first control signal; and outputting a second control signal under the condition that the first pressure is less than or equal to a second preset pressure, wherein the second preset pressure is less than the first preset pressure.
In step 206, the second controller controls the electric air compressor to start or stop according to the control signal under the condition of receiving the control signal.
At step 208, a second air pressure sensor detects a second pressure of a passage between the electric air compressor and the at least one air reservoir.
For example, the second controller controls the electric air compressor to stop under the condition of receiving the first control signal; the second controller controls the electric air compressor to start under the condition of receiving the second control signal;
in step 210, the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is not in the preset range and the control signal is not received.
As some implementations, the upper limit of the preset range is a third preset pressure that is greater than the first preset pressure, and the lower limit of the preset range is a fourth preset pressure that is less than the second preset pressure. And the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is greater than or equal to the third preset pressure and the first control signal is not received, or when the second pressure is less than or equal to the fourth preset pressure and the second control signal is not received.
For example, in the case that the second pressure is greater than or equal to a fifth preset pressure, the electric air compressor is controlled to stop; and controlling the electric air compressor to start under the condition that the second pressure is less than or equal to the sixth preset pressure.
In the case that the dryer 11 further includes a filter screen 113, a check valve 114, a first solenoid valve 115, a second solenoid valve 116, a third solenoid valve 117, and an exhaust valve 118, the first controller may control the first solenoid valve 115, the second solenoid valve 116, and the third solenoid valve 117 according to the above-described manner, which will not be described herein again.
Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (19)
1. A control system for compressed air comprising:
a dryer, comprising:
a first air pressure sensor configured to detect a first pressure of a passage between the electric air compressor and the at least one air reservoir; and
a first controller electrically connected to the first pressure sensor and configured to output a control signal corresponding to the first pressure;
a second air pressure sensor configured to detect a second pressure of a passage between the electric air compressor and the at least one air cylinder;
the second controller is electrically connected with the first controller and the second air pressure sensor and is configured to control the electric air compressor to start or stop according to the control signal under the condition of receiving the control signal; and under the condition that the second pressure is not in a preset range and the control signal is not received, controlling the electric air compressor to start or stop according to the second pressure.
2. The control system of compressed air of claim 1, wherein the control signal comprises a first control signal and a second control signal;
the first controller is configured to output the first control signal if the first pressure is greater than or equal to a first preset pressure; outputting the second control signal when the first pressure is less than or equal to a second preset pressure, wherein the second preset pressure is less than the first preset pressure;
the second controller is configured to control the electric air compressor to stop under the condition of receiving the first control signal; and controlling the electric air compressor to start under the condition of receiving the second control signal.
3. The control system of compressed air according to claim 2, wherein the upper limit of the preset range is a third preset pressure greater than the first preset pressure, and the lower limit of the preset range is a fourth preset pressure less than the second preset pressure;
the second controller is also configured to control the electric air compressor to start or stop according to the second pressure when the second pressure is greater than or equal to the third preset pressure and the first control signal is not received; and under the condition that the second pressure is less than or equal to the fourth preset pressure and the second control signal is not received, controlling the electric air compressor to start or stop according to the second pressure.
4. The control system of compressed air according to any one of claims 1 to 3, wherein said controlling the electric air compressor to start or stop according to the second pressure comprises:
controlling the electric air compressor to stop under the condition that the second pressure is greater than or equal to a fifth preset pressure;
and controlling the electric air compressor to start under the condition that the second pressure is less than or equal to a sixth preset pressure.
5. The compressed air control system of claim 1, wherein the second air pressure sensor is disposed on a path between the dryer and the at least one air reservoir.
6. The compressed air control system of claim 5, wherein the second air pressure sensor is disposed on the at least one air reservoir.
7. The compressed air control system of claim 6, wherein the at least one air reservoir comprises a plurality of air reservoirs, the second air pressure sensor comprises a plurality of second air pressure sensors, and different second air pressure sensors are disposed on different air reservoirs.
8. The control system of compressed air of claim 7, wherein the second pressure comprises a plurality of second pressures;
the second controller is configured to control the electric air compressor to start or stop according to a maximum value in the plurality of second pressures when the maximum value is not in the preset range and the control signal is not received.
9. The compressed air control system of claim 2, wherein the dryer further comprises:
a first port of the filter screen is communicated with the electric air compressor through a first port of the dryer;
a one-way valve, a first port of the one-way valve being in communication with a second port of the filter screen, the second port of the one-way valve being in communication with the at least one air reservoir via a second port of the dryer;
a first solenoid valve, wherein a first port of the first solenoid valve is communicated with a second port of the filter screen, a second port of the first solenoid valve is communicated with a second port of the one-way valve and the second interface, and a control port of the first solenoid valve is electrically connected with the first controller;
a first port of the exhaust valve is communicated with the first port and the first port of the filter screen, and a second port of the exhaust valve is communicated with the third port of the dryer;
a second solenoid valve, a first port of the second solenoid valve being in communication with a second port of the first solenoid valve and the second interface, a second port of the second solenoid valve being in communication with a control port of the exhaust valve, a control port of the second solenoid valve being electrically connected to the first controller; and
a third solenoid valve, wherein a first port of the third solenoid valve is communicated with a second port of the second solenoid valve and a control port of the exhaust valve, a second port of the third solenoid valve is communicated with the fourth interface of the dryer, and a control port of the third solenoid valve is electrically connected with the first controller;
the first controller is further configured to control the first port and the second port of the second solenoid valve to communicate for a first preset time period to communicate the first port and the second port of the exhaust valve and to control the first port and the second port of the first solenoid valve to communicate for a second preset time period including a sub-time period after the first preset time period, in a case where the first pressure is greater than or equal to the first preset pressure; and under the condition that the first pressure is smaller than or equal to the second preset pressure, controlling the first port and the second port of the third electromagnetic valve to be communicated within a third preset time period so that the first port and the second port of the exhaust valve are not communicated, wherein the third preset time period is after the second preset time period.
10. The compressed air control system of claim 9, wherein the dryer further comprises:
and the safety valve is arranged between the first interface and the fifth interface of the dryer.
11. A control system for compressed air according to claim 9 or 10, wherein the filter screen comprises:
a first filter screen disposed between the first port of the one-way valve and the first interface, and between the first port of the one-way valve and the first port of the vent valve, configured to filter one of water and oil; and
a second filter screen disposed between the first filter screen and the first port and between the first filter screen and the first port of the exhaust valve, configured to filter the other of water and oil.
12. The compressed air control system of claim 1, wherein a protection valve is disposed between the dryer and the at least one air reservoir.
13. The control system of compressed air according to claim 1, wherein the second air pressure sensor is further configured to send the detected second pressure to a display device for display.
14. A new energy automobile comprises: a system for controlling compressed air according to any one of claims 1 to 13.
15. A method of controlling compressed air, comprising:
a first air pressure sensor in a dryer detects a first pressure of a passage between an electric air compressor and the at least one air reservoir, the dryer being disposed between the electric air compressor and the at least one air reservoir;
a first controller in the dryer outputs a control signal corresponding to the first pressure;
a second air pressure sensor detects a second pressure of a passage between the electric air compressor and the at least one air reservoir;
the second controller controls the electric air compressor to start or stop according to the control signal under the condition of receiving the control signal;
and the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is not in a preset range and the control signal is not received.
16. The control method of compressed air according to claim 15, wherein the control signal comprises a first control signal and a second control signal;
the first controller outputting a control signal corresponding to the first pressure includes:
the first controller outputs the first control signal when the first pressure is greater than or equal to a first preset pressure;
the first controller outputs the second control signal when the first pressure is smaller than or equal to a second preset pressure, wherein the second preset pressure is smaller than the first preset pressure;
the second controller controls the electric air compressor to start or stop according to the control signal under the condition that the second controller receives the control signal, and the second controller comprises:
the second controller controls the electric air compressor to stop under the condition of receiving the first control signal;
and the second controller controls the electric air compressor to start under the condition of receiving the second control signal.
17. The control method of compressed air according to claim 16, wherein an upper limit of the preset range is a third preset pressure that is greater than the first preset pressure, and a lower limit of the preset range is a fourth preset pressure that is less than the second preset pressure;
the second controller controls the electric air compressor to start or stop according to the second pressure under the condition that the second pressure is not in a preset range and the control signal is not received, and the second controller comprises:
the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is greater than or equal to the third preset pressure and the first control signal is not received;
and the second controller controls the electric air compressor to start or stop according to the second pressure when the second pressure is less than or equal to the fourth preset pressure and the second control signal is not received.
18. The method for controlling compressed air according to any one of claims 15 to 17, wherein the controlling the electric air compressor to be started or stopped according to the second pressure comprises:
controlling the electric air compressor to stop under the condition that the second pressure is greater than or equal to a fifth preset pressure;
and controlling the electric air compressor to start under the condition that the second pressure is less than or equal to a sixth preset pressure.
19. The compressed air control method according to claim 16, wherein the dryer further comprises:
a first port of the filter screen is communicated with the electric air compressor through a first port of the dryer;
a one-way valve, a first port of the one-way valve being in communication with a second port of the filter screen, the second port of the one-way valve being in communication with the at least one air reservoir via a second port of the dryer;
a first solenoid valve, wherein a first port of the first solenoid valve is communicated with a second port of the filter screen, a second port of the first solenoid valve is communicated with a second port of the one-way valve and the second interface, and a control port of the first solenoid valve is electrically connected with the first controller;
a first port of the exhaust valve is communicated with the first port and the first port of the filter screen, and a second port of the exhaust valve is communicated with the third port of the dryer;
a second solenoid valve, a first port of the second solenoid valve being in communication with a second port of the first solenoid valve and the second interface, a second port of the second solenoid valve being in communication with a control port of the exhaust valve;
a third solenoid valve, a first port of the third solenoid valve being in communication with a second port of the second solenoid valve and a control port of the exhaust valve, a second port of the third solenoid valve being in communication with a fourth port of the dryer;
the method further comprises the following steps:
the first controller controls the first port and the second port of the second solenoid valve to communicate within a first preset time period so that the first port and the second port of the exhaust valve communicate, and controls the first port and the second port of the first solenoid valve to communicate within a second preset time period including a sub-time period after the first preset time period, in a case where the first pressure is greater than or equal to the first preset pressure;
the first controller controls the first port and the second port of the third solenoid valve to be communicated within a third preset time period after the second preset time period so that the first port and the second port of the exhaust valve are not communicated when the first pressure is less than or equal to the second preset pressure.
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| CN112550260B (en) | 2023-08-08 |
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