CN116221083A - Control method and system for air compressor and electric vehicle - Google Patents
Control method and system for air compressor and electric vehicle Download PDFInfo
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- CN116221083A CN116221083A CN202211104631.9A CN202211104631A CN116221083A CN 116221083 A CN116221083 A CN 116221083A CN 202211104631 A CN202211104631 A CN 202211104631A CN 116221083 A CN116221083 A CN 116221083A
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- pressure value
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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
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/16—Filtration; Moisture separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/10—Other safety measures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention relates to the technical field of electric vehicles, and discloses a control method and a control system for an air compressor and an electric vehicle, wherein the control method and the control system are applied to a pneumatic braking system of the electric vehicle, the pneumatic braking system comprises the air compressor, a dryer and a braking loop, the braking loop comprises a braking air chamber, an air storage cylinder and a braking pedal, and the control method comprises the following steps: acquiring a gas storage pressure value of a gas storage cylinder, sending a starting instruction of the air compressor under the condition that the gas storage pressure value is lower than a first pressure value so as to start the air compressor, acquiring an unloading signal of a dryer and a starting state of the air compressor, and judging whether the air compressor is abnormal or not according to the gas storage pressure value, the unloading signal and the starting state.
Description
Technical Field
The invention relates to the technical field of electric vehicles, in particular to a control method and system for an air compressor and an electric vehicle.
Background
The pneumatic braking of the electric vehicle takes compressed air as a braking source, a braking pedal controls the compressed air to enter a front braking air chamber and a rear braking air chamber, the front braking air chamber and the rear braking air chamber can generate different thrust according to different air pressures of the input compressed air, and the front and the rear axles are braked with different intensities by a braking cam. The air compressor is an air source of a whole vehicle brake loop, the existing control method for the brake air compressor usually does not consider potential safety hazards caused by abnormality such as failure and incapability of working of the air compressor and air leakage of the brake loop, and related detection means and corresponding measures are not arranged.
Disclosure of Invention
The invention aims to solve the problem that detection and countermeasures related to abnormal occurrence of a brake system are not arranged in the existing brake air compressor control method, and provides a control method and system for an air compressor and an electric vehicle.
In order to achieve the above object, a first aspect of the present application provides a control method for an air compressor, applied to a pneumatic braking system of an electric vehicle, the pneumatic braking system including an air compressor, a dryer, and a brake circuit including a brake air chamber, an air reservoir, and a brake pedal, the control method comprising:
acquiring a gas storage pressure value of a gas storage cylinder;
under the condition that the air storage pressure value is smaller than the first air pressure value, sending an air compressor starting instruction to start the air compressor;
acquiring unloading signals of a dryer and a starting state of an air compressor;
and judging whether the air compressor is abnormal or not according to the air storage pressure value, the unloading signal and the starting state.
In one embodiment of the present application, the control method further includes:
and under the condition that the air compressor is abnormal, indicating the whole vehicle controller to intervene in service braking.
In one embodiment of the present application, the control method further includes:
and under the condition that the air compressor is abnormal, sending out an abnormal prompt signal of the air compressor.
In one embodiment of the present application, determining whether an abnormality occurs in an air compressor according to a gas storage pressure value, an unloading signal, and a start state includes:
and determining that the air compressor is abnormal under the condition that the air storage air pressure value is smaller than the first air pressure value, the unloading signal is in a non-unloading state and the air compressor is not started.
In one embodiment of the present application, indicating that the vehicle controller is involved in service braking includes:
the whole vehicle controller is instructed to acquire the braking depth of a brake pedal, the braking air pressure value of a braking air chamber and the running speed of the vehicle, so that the whole vehicle controller instructs the driving motor controller to control the motor to perform reverse dragging braking according to the braking depth, the braking air pressure value and the running speed.
In one embodiment of the present application, the control method further includes:
and setting the working state of the air compressor according to the air storage pressure value and the unloading signal.
In one embodiment of the present application, the control method further includes:
acquiring the braking depth of a brake pedal and the braking air pressure value of a braking air chamber;
determining that the air tightness of the brake loop is abnormal under the condition that the air storage pressure value is larger than or equal to the first air pressure value, the brake depth is 0 and the difference value between the air storage pressure value and the brake pressure value is larger than the third air pressure value;
and when the air tightness is abnormal, sending an abnormal prompt signal.
In one embodiment of the present application, setting an operating state of the air compressor according to the air storage pressure value and the unloading signal includes:
under the condition that the air storage pressure value is smaller than the first air pressure value and the unloading signal is in an unloading state, controlling the air compressor to stop after working for a first time period;
when the air storage pressure value is smaller than the first pressure value and the unloading signal is in a non-unloading state, controlling the air compressor to work infinitely;
under the condition that the air storage pressure value is larger than the second air pressure value and the unloading signal is in an unloading state, controlling the air compressor to continue to work for a second period of time and then stopping the air compressor, wherein the first air pressure value is smaller than the second air pressure value;
and under the condition that the air storage pressure value is larger than the second pressure value and the unloading signal is in a non-unloading state, controlling the air compressor to continue working for a first period of time and stopping the air compressor.
The second method of the present application provides a control system for an air compressor, applied to a pneumatic braking system of an electric vehicle, the pneumatic braking system including an air compressor, a dryer, and a brake circuit including a brake chamber, an air reservoir, and a brake pedal, the control system including:
a plurality of sensors configured to respectively collect a gas storage pressure value and a brake chamber pressure value;
a dryer pressure switch configured to output an unloading signal;
the air compressor controller is configured to execute the control method of the brake air compressor;
the whole vehicle controller is configured to intervene in service braking according to the instruction of the air compressor controller;
a third aspect of the present application provides an electric vehicle, including the control system for an air compressor described above.
Through the technical scheme, the air compressor controller combines the pressure value of the air reservoir and the unloading state of the dryer to perform starting control of the air compressor, and combines the pressure value of the brake air chamber, the state of the brake pedal and the starting state of the air compressor on the basis of the starting control to judge whether the air tightness of the brake loop is abnormal or not and whether the air compressor is abnormal or not. And under the condition that the air tightness of the brake loop or the air compressor is abnormal, a warning prompt is sent out, and the whole vehicle controller intervenes in the braking of the vehicle, so that enough safety redundancy is reserved for the air pressure braking of the vehicle.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
fig. 1 schematically shows a flow diagram of a control method for an air compressor according to an embodiment of the present application;
fig. 2 schematically illustrates a logic diagram of an air compressor controller controlling an air compressor to start and set an operating state according to an embodiment of the present application;
fig. 3 schematically illustrates a logic diagram of an air compressor controller for determining whether an abnormality occurs in the air compressor according to an embodiment of the present application;
fig. 4 schematically illustrates a logic diagram of an air compressor controller for judging whether the air tightness of a brake circuit is abnormal according to an embodiment of the present application; and
fig. 5 schematically illustrates a structural diagram of a control system for an air compressor according to an embodiment of the present application.
Detailed Description
The following detailed description of specific embodiments of the present application refers to the accompanying drawings. It should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application.
It should be noted that, in the embodiment of the present application, directional indications (such as up, down, left, right, front, and rear … …) are referred to, and the directional indications are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.
Fig. 1 schematically illustrates a flowchart of a control method of a brake air compressor according to an embodiment of the present application, as shown in fig. 1, in an embodiment of the present application, there is provided a control method of a brake air compressor, which may include the steps of:
step S101: acquiring a gas storage pressure value of a gas storage cylinder;
step S102: under the condition that the air storage pressure value is smaller than the first air pressure value, sending an air compressor starting instruction to start the air compressor;
step S103: and acquiring unloading signals of the dryer and the starting state of the air compressor.
The prior air brake system of the electric vehicle mainly comprises an air compressor, a dryer and a brake loop. The brake circuit includes front and rear air reservoirs, a brake pedal, and front and rear brake chambers. The air compressor inputs compressed air into the dryer, and the dryer absorbs moisture in the compressed air to provide clean and dry compressed air for the brake loop. Compressed air processed by the dryer enters the front air storage cylinder and the rear air storage cylinder through the braking loop, and the compressed air in the front air storage cylinder and the rear air storage cylinder enters the front braking air chamber and the rear braking air chamber according to the braking depth of the braking pedal to generate braking thrust to finish braking. The front and rear air cylinders respectively correspond to the front and rear braking air chambers, and the front and rear air cylinders and the front and rear braking air chambers cooperatively control braking of the front axle and the rear axle. Therefore, whether the air storage cylinder needs to be filled with more compressed air or not can be judged according to the air storage pressure value of the air storage cylinder, namely, whether the air compressor needs to be started to charge the air storage cylinder or not.
Fig. 2 schematically illustrates a logic diagram of an air compressor controller controlling an air compressor to start and set a working state according to an embodiment of the present application, as shown in fig. 2, in an embodiment of the present application, since an existing air compressor needs to be started to operate under a condition of having a high voltage input, when a control flow of the air compressor controller starts, the air compressor controller may determine whether a secondary driving relay is closed and whether a voltage input to the air compressor is greater than a required operation voltage value of the air compressor, and the air compressor controller may start the air compressor under a condition that the input voltage is greater than the required operation voltage of the air compressor, otherwise, does not respond to directly end the control flow. In one embodiment of the present application, the operating voltage required by the air compressor may be 450 volts, and the specific operating voltage may depend on the design parameters of the automobile, which is not limited in this application.
As shown in fig. 2, in one embodiment of the present application, after determining whether the sub-driving relay is closed and whether the voltage input to the air compressor is greater than the operation voltage value required by the air compressor, the air compressor controller determines whether to start the air compressor according to the air pressure value of the air reservoir. If the air storage pressure value reaches a preset first air pressure value, the air pressure of the compressed air in the brake loop meets the requirement of brake operation, and the air compressor is not required to be inflated, so that the air compressor controller judges that the air compressor is not started, and the control flow is ended; if the air storage pressure value does not reach the preset first air pressure value, the air storage pressure value indicates that the air pressure of the compressed air in the brake loop does not meet the requirement of brake operation, and the air compressor is required to be inflated, so that the air compressor controller judges that the air compressor is started. In one embodiment of the present application, the first voltage value may be set to 0.9MPa, and the specific first voltage value may be determined according to design parameters of the automobile, which is not limited in this application.
In one embodiment of the present application, the control method of the brake air compressor further includes:
step S210: setting the working state of the air compressor according to the air storage pressure value and the unloading signal;
the dryer is connected with the air compressor, when the air pressure in the dryer is increased to a preset unloading value, an unloading valve in the dryer is opened to discharge the internal compressed air to the atmosphere, meanwhile, a pressure switch in the dryer outputs an unloading signal which indicates that the dryer is in an unloading state, and in the case that the dryer is not opened by the unloading valve, the unloading signal output by the pressure switch is not in an unloading state, and in one embodiment of the application, the unloading signal in the unloading state is 1, and the unloading signal in the non-unloading state is 0.
In one embodiment of the present application, step S210 includes:
step S211: under the condition that the air storage pressure value is smaller than the first air pressure value and the unloading signal is in an unloading state, controlling the air compressor to stop after working for a first time period;
step S212: when the air storage pressure value is smaller than the first pressure value, the unloading signal is in a non-unloading state, and the air compressor is controlled to work infinitely;
step S213: under the condition that the air storage pressure value is larger than the second air pressure value and the unloading signal is in an unloading state, controlling the air compressor to continue to work for a second period of time and stopping the air compressor;
step S214: and under the condition that the air storage pressure value is larger than the second pressure value and the unloading signal is in a non-unloading state, controlling the air compressor to continue working for a first period of time and stopping the air compressor.
As shown in fig. 2, in one embodiment of the present application, the air compressor controller performs setting of the operation state of the air compressor according to the unloading state expressed by the unloading signal output from the dryer pressure switch. Because the air compressor controller has already judged in the previous control flow whether the air pressure value in the air receiver reaches the first air pressure value, the first air pressure value is only the air pressure value that the air pressure of the compressed air in the brake circuit meets the requirement of braking operation, and a certain gap exists necessarily in comparison with the preset brake circuit unloading value, if the unloading signal obtained at this time is in an unloading state (the unloading signal is 1), the fact that the dryer is in the unloading state cannot be explained, the air compressor controller judges that the dryer pressure switch has a fault or the sensitivity is insufficient, and the air compressor controller is stopped after the first time period of operation of the air compressor is controlled on the premise that the air pressure safety of the brake circuit and the braking air pressure requirement of the brake circuit are required to be balanced. In one embodiment of the present application, the first duration may be set to 45 seconds, and a specific value of the first duration may be set according to design parameters of an automobile and safety redundancy requirements, which is not limited in this application. Further, if the unloading signal obtained at this time is in a non-unloading state (the unloading signal is 0), that is, the pressure switch of the dryer is not abnormal, the air compressor controller controls the air compressor to work normally and does not limit time.
As shown in fig. 2, in one embodiment of the present application, when the air pressure value of the air reservoir obtained by the air compressor controller is greater than the second air pressure value, that is, the unloading value of the preset brake circuit, it is indicated that the unloaded valve of the dryer is opened to unload, if the unloading signal obtained at this time is in the unloading state, it is indicated that the dryer pressure switch has no fault, and the air compressor is controlled to continue to operate for the second duration, that is, to stop after delaying for the second duration, in consideration of the reaction duration of the dryer pressure switch, and the air compressor is inflated. In one embodiment of the present application, the second time period may be set to 1 second, and the specific value of the second time period may be determined according to the test data of the dryer pressure switch, which is not limited in the present application. Further, if the unloading signal obtained at the moment is in a non-unloading state, the air compressor controller judges that the pressure switch of the dryer has a fault or insufficient sensitivity, and the air compressor is controlled to stop after continuously working for a first time.
In one embodiment of the present application, as shown in fig. 1, the control method of the brake air compressor provided in the present application further includes:
step S104: and judging whether the air compressor is abnormal or not according to the air storage pressure value, the unloading signal and the starting state.
Fig. 3 schematically illustrates a logic diagram of an air compressor controller according to an embodiment of the present application to determine whether an abnormality occurs in the air compressor, as shown in fig. 3, in an embodiment of the present application, the air compressor controller determines that an air reservoir air pressure value does not reach a preset first air pressure value, issues an air compressor starting instruction, and determines that an unloading signal output by a dryer pressure switch is not in an unloading state, that is, after the working state of the air compressor is set to be infinite, in order to determine whether the air compressor is started according to the starting instruction, the starting state of the air compressor is obtained, and if the air compressor is not started, the air compressor controller determines that the air compressor is abnormal.
In an embodiment of the application, after determining that the air compressor is abnormal, the air compressor controller sends out an abnormal prompting signal of the air compressor, so as to prompt a driver to make relevant safety guarantee actions (such as timely stopping by the side), and the abnormal prompting signal of the air compressor can be transmitted to an instrument of an automobile for display.
In one embodiment of the present application, the control method of the brake air compressor provided in the present application further includes:
step S105: and under the condition that the air compressor is abnormal, indicating the whole vehicle controller to intervene in service braking.
The air compressor controller sends out an abnormal prompt signal of the air compressor and simultaneously sends out a braking instruction to the whole Vehicle Controller (VCU), and the whole vehicle controller starts to intervene in service braking, so that the service safety is ensured.
In one embodiment of the application, the whole vehicle controller instructs the driving motor controller to control the motor to perform reverse braking, the motor is subjected to reverse braking, the motor originally serving as an engine is used as a generator to charge a battery, and meanwhile the effect of vehicle braking is achieved. The whole vehicle controller intervenes in the service braking, namely the motor reverse braking is coupled with the air braking, and part of the air braking is changed into the motor reverse braking. The vehicle controller obtains the braking depth of the brake pedal, the braking air pressure value of the brake air chamber and the running speed of the vehicle, calculates the braking thrust required by the braking of the vehicle according to the running speed, calculates the braking thrust required by the anti-dragging braking of the motor according to the existing braking air pressure value of the brake air chamber, and instructs the motor controller to control the motor to perform the anti-dragging braking according to the calculation result, so that the interaction between the vehicle controller and the air pressure braking system is realized, and the greater safety redundancy is set for the air pressure braking of the vehicle.
In one embodiment of the present application, the control method of the brake air compressor further includes:
step S220: acquiring the braking depth of a brake pedal and the braking air pressure value of a braking air chamber;
step S230: judging whether the air tightness of the brake loop is abnormal or not according to the brake depth, the brake air pressure value and the air storage air pressure value;
step S240: and when the air tightness is abnormal, sending out an air tightness abnormal prompt signal.
Under the condition that the brake circuit does not brake, the air pressure of each part of the whole air circuit is equal, so if the air pressure difference value between two component parts of the brake circuit, namely the air reservoir and the brake air chamber, reaches a certain value, the air tightness of the brake circuit is inevitably abnormal, namely an air leakage phenomenon exists in a certain part of the brake circuit.
Fig. 4 schematically illustrates a logic diagram of the air compressor controller for judging whether the air tightness of the brake circuit is abnormal according to the embodiment of the present application, as shown in fig. 4, in one embodiment of the present application, when the air reservoir air pressure value reaches the preset first air pressure value, the air compressor controller judges that the air compressor does not need to be started, the air compressor controller judges whether the air tightness of the brake circuit is abnormal according to the braking depth of the brake pedal, the difference value between the front and rear air reservoir air pressure values and the front and rear brake air chamber air pressure values, if the braking depth of the brake pedal is 0, that is, the braking loop does not brake, and the difference value between the air storage pressure values of the front air storage cylinder and the rear air storage cylinder and the braking pressure values of the front braking air chamber and the rear braking air chamber is larger than a preset third air pressure value, the air compressor controller judges that the braking loop is abnormal in air tightness and sends out an abnormal air tightness prompt signal. In one embodiment of the present application, the third air pressure value may be set to 20KPa, and the specific third air pressure value may be set according to the design parameters of the automobile and the safety redundancy requirement, which is not limited in this application.
Fig. 5 schematically illustrates a structural diagram of a control system for an air compressor according to an embodiment of the present application, as shown in fig. 5, in an embodiment of the present application, there is provided a control system for braking an air compressor, an air pressure control system applied to an electric vehicle, an air pressure brake system including an air compressor, a dryer, and a brake circuit including a brake air chamber, an air receiver, and a brake pedal, the control system including:
the sensors comprise an air storage cylinder pressure sensor 1 and a brake air chamber pressure sensor 2, and are respectively used for collecting the air storage pressure value of the air storage cylinder and the brake air pressure value of the brake air chamber;
a dryer pressure switch 3, which is arranged in the dryer and is used for outputting unloading signals;
an air compressor controller 4 for executing the control method for the air compressor in the above-described embodiment;
the whole vehicle controller 5 is used for intervening in service braking according to the instruction of the air compressor controller;
the instrument 6 is used for displaying an air tightness abnormality prompting signal of the brake circuit and an air compressor abnormality prompting signal;
and the driving motor controller 7 is used for controlling the motor to carry out reverse dragging braking.
In one embodiment of the present application, the instrument 6, the whole vehicle controller 5, the driving motor controller 7 and the air compressor controller 4 are in communication through a CAN bus network connection, and the air compressor controller 4 is in hard wire connection with the air reservoir pressure sensor 1, the dryer pressure switch 3 and the brake air chamber pressure sensor 2, so that signal transmission is realized.
In one embodiment of the present application, an electric vehicle is provided that includes the control system for an air compressor of the above embodiment.
In one embodiment of the present application, there is provided a machine-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, cause the processor to implement the control method for an air compressor in the above embodiment.
In one embodiment of the present application, there is also provided a computer program product comprising a computer program which, when executed by a processor, implements the fault detection method for an ultrasonic water dispenser according to the above-described embodiments.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (10)
1. A control method for an air compressor, characterized by being applied to a pneumatic braking system of an electric vehicle, the pneumatic braking system including an air compressor, a dryer, and a brake circuit including a brake air chamber, an air reservoir, and a brake pedal, the control method comprising:
acquiring a gas storage pressure value of the gas storage cylinder;
sending an air compressor starting instruction to start the air compressor under the condition that the air storage pressure value is smaller than a first air pressure value;
acquiring unloading signals of the dryer and a starting state of the air compressor;
judging whether the air compressor is abnormal or not according to the air storage pressure value, the unloading signal and the starting state.
2. The control method according to claim 1, characterized by further comprising:
and under the condition that the air compressor is abnormal, indicating the whole vehicle controller to intervene in service braking.
3. The control method according to claim 1, characterized by further comprising:
and sending out an air compressor abnormity prompt signal under the condition that the air compressor is abnormal.
4. The control method according to claim 1, wherein the determining whether the air compressor is abnormal according to the air storage pressure value, the unloading signal, and the start state includes:
and determining that the air compressor is abnormal under the condition that the air storage pressure value is smaller than the first air pressure value, the unloading signal is in a non-unloading state and the air compressor is not started.
5. The control method according to claim 1, characterized in that the instructing the vehicle controller to intervene in service braking includes:
and the whole vehicle controller is instructed to acquire the braking depth of the brake pedal, the braking air pressure value of the braking air chamber and the running speed of the vehicle, so that the whole vehicle controller instructs the driving motor controller to control the motor to perform reverse dragging braking according to the braking depth, the braking air pressure value and the running speed.
6. The control method according to claim 1, characterized by further comprising:
and setting the working state of the air compressor according to the air storage pressure value and the unloading signal.
7. The control method according to claim 1, characterized by further comprising:
acquiring the braking depth of the brake pedal and the braking air pressure value of the braking air chamber;
determining that the air tightness of the brake loop is abnormal under the condition that the air storage pressure value is larger than or equal to the first air pressure value, the brake depth is 0 and the difference value between the air storage pressure value and the brake air pressure value is larger than a third air pressure value;
and sending out an air tightness abnormality prompt signal under the condition that the air tightness is abnormal.
8. The control method according to claim 6, wherein the setting the operation state of the air compressor according to the air storage pressure value and the unloading signal includes:
when the air storage pressure value is smaller than the first air pressure value and the unloading signal is in an unloading state, controlling the air compressor to stop after working for a first time period;
when the air storage pressure value is smaller than the first air pressure value and the unloading signal is in a non-unloading state, controlling the air compressor to work infinitely;
under the condition that the air storage pressure value is larger than a second air pressure value and the unloading signal is in an unloading state, controlling the air compressor to stop after continuously working for a second period of time, wherein the second air pressure value is larger than the first air pressure value;
and under the condition that the air storage pressure value is larger than the second air pressure value and the unloading signal is in a non-unloading state, controlling the air compressor to stop after continuously working for a first period of time.
9. A control system for an air compressor, characterized by being applied to an air brake system of an electric vehicle, the air brake system comprising an air compressor, a dryer, and a brake circuit comprising a brake chamber, an air reservoir, and a brake pedal, the control system comprising:
the sensors are configured to acquire the air storage pressure value of the air storage cylinder and the braking air pressure value of the braking air chamber respectively;
a dryer pressure switch configured to output an unloading signal;
an air compressor controller configured to perform the control method for an air compressor according to any one of claims 1 to 8; and
and the whole vehicle controller is configured to intervene in service braking according to the instruction of the air compressor controller.
10. An electric vehicle characterized by comprising a control system for an air compressor according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211104631.9A CN116221083A (en) | 2022-09-09 | 2022-09-09 | Control method and system for air compressor and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211104631.9A CN116221083A (en) | 2022-09-09 | 2022-09-09 | Control method and system for air compressor and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116221083A true CN116221083A (en) | 2023-06-06 |
Family
ID=86585979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211104631.9A Pending CN116221083A (en) | 2022-09-09 | 2022-09-09 | Control method and system for air compressor and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116221083A (en) |
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2022
- 2022-09-09 CN CN202211104631.9A patent/CN116221083A/en active Pending
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