Method and device for determining energy consumption of air compressor of commercial vehicle

Abstract

The invention discloses a commercial vehicle air compressor energy consumption determination method and device, and the method comprises the steps: exporting test data generated by a commercial vehicle in a road test process, and the test data at least comprise brake cylinder pressure data; according to the pressure data of the brake cylinder at the current moment and the pressure data of the brake cylinder at the next moment, the unloading starting time and the unloading ending time of the air compressor are determined; after unloading of the air compressor is finished, operation data of the air compressor are obtained, and the operation data comprise unloading data and working data; when the air compressor works, a current state signal of the commercial vehicle is obtained; determining the working state of the commercial vehicle according to the current state signal; and when the commercial vehicle works, the energy consumption of the air compressor is determined according to the rotating speed signal during operation of the air compressor. By utilizing the method, the determination of the unloading data of the air compressor, the determination of the working state of the whole vehicle when the air compressor works and the determination of the energy consumption of the air compressor are realized, and the energy-saving property and the safety of the commercial vehicle are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of commercial vehicles, in particular to a method and device for determining the energy consumption of an air compressor of a commercial vehicle. BACKGROUND

[0002] During the whole vehicle road test verification phase of a commercial vehicle, the air compressor, as one of the key components, directly affects the safety, efficiency and overall operation experience of the vehicle. For most commercial vehicles, especially trucks and buses, they rely on a pneumatic braking system. The air compressor is responsible for generating and maintaining the pressure in the air tank to ensure that the brake responds in time.

[0003] Currently, there is only a method for calculating the air intake of the air compressor. The unloading data and working data of the air compressor are not involved at the same time in terms of the working state of the whole vehicle and the energy consumption of the air compressor when the air compressor is working. Therefore, a method is needed to simultaneously achieve the above functions and determine the energy-saving effect of the air compressor. SUMMARY

[0004] The present application provides a method and device for determining the energy consumption of an air compressor of a commercial vehicle to determine the unloading data of the air compressor, the working state of the whole vehicle and the energy consumption of the air compressor when the air compressor is working according to test data, and to ensure the energy-saving and safety of the commercial vehicle.

[0005] In a first aspect, the present application provides a method for determining the energy consumption of an air compressor of a commercial vehicle, comprising:

[0006] deriving test data generated by the commercial vehicle during a road test, the test data at least including brake cylinder pressure data;

[0007] determining the start time and end time of air compressor unloading according to the brake cylinder pressure data at the current time and the brake cylinder pressure data at the next time;

[0008] after the air compressor unloading is completed, obtaining running data of the air compressor, the running data including unloading data and working data;

[0009] when the air compressor is working, obtaining a current state signal of the commercial vehicle;

[0010] determining the working state of the commercial vehicle according to the current state signal;

[0011] determining the energy consumption of the air compressor according to the rotational speed signal of the air compressor when the commercial vehicle is working.

[0012] Optionally, determining the start time and end time of air compressor unloading according to the brake cylinder pressure data at the current time and the brake cylinder pressure data at the next time, comprises:

[0013] If the brake cylinder pressure data at the current moment is greater than or equal to the brake cylinder pressure data at the next moment, then the current moment is determined as the start time for unloading the air compressor.

[0014] If the brake cylinder pressure data at the previous moment is less than the brake cylinder pressure data at the next moment within a preset time period, the previous moment is determined as the end time of air compressor unloading.

[0015] Optionally, the current status signals of commercial vehicles include gear position signal, current speed signal, and accelerator pedal signal;

[0016] Based on the current status signals, determine the operating status of the commercial vehicle, including:

[0017] Based on the gear position signal, accelerator pedal signal and current speed signal, determine whether the commercial vehicle is in a coasting state or a normal driving state.

[0018] Based on the gear position signal and the current speed signal, determine whether the commercial vehicle is in neutral coasting or idling.

[0019] Optionally, based on the gear position signal, accelerator pedal signal, and current speed signal, determine whether the commercial vehicle is in a coasting state or a normal driving state, including:

[0020] When the gear signal is not in neutral, the accelerator pedal signal is 0, and the current speed signal is not 0, it is determined that the commercial vehicle is in a coasting state with gear.

[0021] When the gear position signal is not in neutral, the accelerator pedal signal is not 0, and the current speed signal is not 0, the commercial vehicle is determined to be in normal driving condition.

[0022] Optionally, based on the gear position signal and the current speed signal, determine whether the commercial vehicle is in neutral coasting or idling, including:

[0023] When the gear signal is in neutral and the current speed signal is not 0, it is determined that the commercial vehicle is in neutral coasting mode.

[0024] When the gear signal is in neutral and the current speed signal is 0, it is determined that the commercial vehicle is in an idling state.

[0025] Optionally, the energy consumption of the air compressor can be determined based on the speed signal during operation, including:

[0026] The total power of the air compressor is determined based on the speed signal during operation.

[0027] The energy consumption of the air compressor is determined based on the total power of the air compressor and the output power of the engine.

[0028] Optionally, the total power of the air compressor can be determined based on the speed signal during operation, including:

[0029] Determine the unloading power of the air compressor based on the speed signal when the air compressor is unloaded;

[0030] Determine the unloading power of the air compressor based on its unloading power.

[0031] The working power of the air compressor is determined based on the speed signal during operation.

[0032] Determine the working power of the air compressor based on its working power.

[0033] The total power of the air compressor is determined based on the unloading work and the working work.

[0034] Optionally, before determining the energy consumption of the air compressor based on its total power and the engine's output power, the following steps may also be taken:

[0035] Acquire engine speed and engine torque signals;

[0036] The engine output power is determined based on the speed and torque signals.

[0037] Optionally, the energy consumption of the air compressor can be determined based on the total power of the air compressor and the output power of the engine, including:

[0038] The ratio of the total output power of the air compressor to that of the engine is defined as the energy consumption of the air compressor.

[0039] Secondly, the present invention provides a device for determining the energy consumption of an air compressor in a commercial vehicle, comprising:

[0040] The data export module is used to export test data generated during road testing of commercial vehicles. The test data includes at least brake cylinder pressure data.

[0041] The unloading time determination module is used to determine the start and end times of unloading the air compressor based on the brake cylinder pressure data at the current moment and the brake cylinder pressure data at the next moment.

[0042] The data acquisition module is used to acquire the operating data of the air compressor after the air compressor is unloaded. The operating data includes unloading data and working data.

[0043] The signal acquisition module is used to acquire the current status signal of the commercial vehicle when the air compressor is working;

[0044] The status determination module is used to determine the operating status of the commercial vehicle based on the current status signal.

[0045] The energy consumption determination module is used to determine the energy consumption of the air compressor based on the speed signal of the air compressor during operation when the commercial vehicle is working.

[0046] The technical solution of this invention involves deriving test data generated during road testing of a commercial vehicle. This test data includes at least brake cylinder pressure data. Based on the current and next brake cylinder pressure data, the start and end times of air compressor unloading are determined. After air compressor unloading, operating data is acquired, including unloading data and working data. While the air compressor is operating, the current status signal of the commercial vehicle is acquired. Based on the current status signal, the operating status of the commercial vehicle is determined. While the commercial vehicle is operating, the energy consumption of the air compressor is determined based on the air compressor's rotational speed signal. Using this method, based on the test data, the determination of air compressor unloading data, the determination of the vehicle's operating status during air compressor operation, and the determination of air compressor energy consumption are achieved, thus providing energy efficiency and safety for commercial vehicles.

[0047] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 A flowchart illustrating a method for determining the energy consumption of an air compressor in a commercial vehicle, provided by an embodiment of the present invention;

[0050] Figure 2 A dot plot of air compressor unloading data provided in an embodiment of the present invention;

[0051] Figure 3 A flowchart illustrating another method for determining the energy consumption of an air compressor in a commercial vehicle, provided by an embodiment of the present invention;

[0052] Figure 4 A percentage diagram illustrating the states of an air compressor and a commercial vehicle, provided as an embodiment of the present invention;

[0053] Figure 5 This is a schematic diagram of a device for determining the energy consumption of an air compressor in a commercial vehicle, provided in an embodiment of the present invention. Detailed Implementation

[0054] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0056] In one embodiment, Figure 1 This is a flowchart illustrating a method for determining the energy consumption of an air compressor in a commercial vehicle, provided by an embodiment of the present invention. Figure 2 This invention provides a dot plot of air compressor unloading data. This embodiment is applicable to situations where air compressor operating data, vehicle operating status, and air compressor energy consumption are simultaneously determined during road testing of commercial vehicles. This method can be executed by a commercial vehicle air compressor energy consumption determination device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 and Figure 2 As shown, the method includes:

[0057] S110, Export test data generated during road testing of commercial vehicles.

[0058] Specifically, during road tests of commercial vehicles, test data is generated and exported. This data includes at least brake cylinder pressure data, and may also include vehicle speed, environmental conditions, and engine data. The exported test data is then iterated to determine the brake cylinder pressure data at different times. The brake cylinder pressure data represents the real-time pressure value in each air reservoir of the braking system.

[0059] S120. Based on the current brake cylinder pressure data and the next brake cylinder pressure data, determine the start and end times of unloading the air compressor.

[0060] Unloading refers to an operating mode adopted when the system does not require more compressed air, in order to prevent the air compressor from continuously running under load, which would lead to energy waste and overheating. During unloading, the air compressor will stop compressing air but continue to operate.

[0061] Specifically, after obtaining the brake cylinder pressure data, based on the brake cylinder pressure data at each time point, if the brake cylinder pressure data at the current time point is greater than or equal to the brake cylinder pressure data at the next time point, it indicates that unloading has begun. After unloading begins, the air compressor is still in the unloading process if the brake cylinder pressure data at the current time point decreases or remains constant at the next time point. Additionally, if it is determined that the pressure data at the previous time point is less than the pressure data at the next time point, but the pressure data at the time point after that is less than the pressure data at the previous time point, it indicates an abnormal rise during the unloading process, but the overall trend is still downward. In this case, it can be determined that the air compressor is still in the unloading process. If it is determined that the pressure data at the previous time point is consistently greater than the pressure data at the next time point for a certain period of time, it indicates that unloading has ended, and the time of the end of unloading is the time of the previous time point. For example, if the time interval is 1 second, and the pressure data at 1 second is greater than the pressure data at 2 seconds, then 1 second can be determined as the unloading start time. After the unloading starts, if the pressure data of the first 1 second is greater than the pressure data of the second 1 second in adjacent 1-second intervals within a 10-second interval, then it is determined that the unloading process is in progress for 10 seconds. If the pressure data at 11 seconds is greater than the pressure data at 10 seconds, and the pressure data of the first 1 second is less than the pressure data of the second 1 second in the following 5 seconds, then the unloading is determined to be over, and the end time is 10 seconds.

[0062] S130. After the air compressor is unloaded, acquire the air compressor's operating data, which includes unloading data and working data.

[0063] Specifically, after the air compressor is unloaded, its operating data is acquired. Since the air compressor only exists in two states after the vehicle starts: unloading and operation, the acquired operating data includes only unloading data and operation data. The unloading data represents the data generated by the air compressor during the unloading process, while the operation data represents the data generated by the air compressor during operation. The differentiated unloading data is then integrated and plotted. (Refer to...) Figure 2 As shown in the figure, the horizontal axis represents time and the vertical axis represents the brake cylinder pressure data. This is a dot plot, and the brake cylinder pressure data corresponding to each point represents the air compressor unloading data.

[0064] S140. When the air compressor is working, acquire the current status signal of the commercial vehicle.

[0065] Specifically, after obtaining the air compressor's operating data, it can be determined that the air compressor is in normal operating condition. In this state, the current status signal during the commercial vehicle test is acquired. This current status signal may include, but is not limited to, the current speed signal and the vehicle's gear position signal. Furthermore, the methods for acquiring the commercial vehicle's current status signal may include, but are not limited to, real-time acquisition using corresponding sensors. For example, the current speed signal can be acquired using a speed sensor, and the vehicle's gear position signal can be acquired using a gear position sensor.

[0066] S150. Determine the operating status of the commercial vehicle based on the current status signal.

[0067] Specifically, after acquiring the current status signal of the commercial vehicle, the operating status of the commercial vehicle is determined based on the different forms of the current status signal. The operating status of the commercial vehicle may include, but is not limited to, coasting in gear, coasting in neutral, normal operation, and idling.

[0068] S160. When the commercial vehicle is in operation, determine the energy consumption of the air compressor based on the speed signal of the air compressor during operation.

[0069] Specifically, when the commercial vehicle is determined to be in normal working condition, the speed signal of the air compressor is received, and the air compressor power corresponding to the speed is determined based on the speed signal, thereby determining the total power of the air compressor. Then, based on the total power of the air compressor and the output power of the engine, the energy consumption of the air compressor can be determined.

[0070] The technical solution of this invention involves deriving test data generated during road testing of a commercial vehicle. This test data includes at least brake cylinder pressure data. Based on the current and next brake cylinder pressure data, the start and end times of air compressor unloading are determined. After air compressor unloading, operating data is acquired, including unloading data and working data. While the air compressor is operating, the current status signal of the commercial vehicle is acquired. Based on the current status signal, the operating status of the commercial vehicle is determined. While the commercial vehicle is operating, the energy consumption of the air compressor is determined based on the air compressor's rotational speed signal. Using this method, based on the test data, the determination of air compressor unloading data, the determination of the vehicle's operating status during air compressor operation, and the determination of air compressor energy consumption are achieved, thus providing energy efficiency and safety for commercial vehicles.

[0071] In another alternative embodiment, Figure 3 This is a flowchart of another method for determining the energy consumption of an air compressor in a commercial vehicle, provided by an embodiment of the present invention. Figure 4This embodiment of the invention provides a percentage diagram of the air compressor status and the commercial vehicle status. The specific implementation of S120 in the above embodiment, which determines the air compressor unloading start and end times based on the current brake cylinder pressure data and the next brake cylinder pressure data, is refined as follows:

[0072] If the brake cylinder pressure data at the current moment is greater than or equal to the brake cylinder pressure data at the next moment, then the current moment is determined as the start time for unloading the air compressor.

[0073] If the brake cylinder pressure data at the previous moment is less than the brake cylinder pressure data at the next moment within a preset time period, the previous moment is determined as the end time of air compressor unloading.

[0074] Furthermore, the specific implementation method for S150 to determine the operating status of the commercial vehicle based on the current status signal is refined as follows:

[0075] Based on the gear position signal, accelerator pedal signal and current speed signal, determine whether the commercial vehicle is in a coasting state or a normal driving state.

[0076] Based on the gear position signal and the current speed signal, determine whether the commercial vehicle is in neutral coasting or idling.

[0077] Furthermore, the specific implementation method for determining the energy consumption of the air compressor based on the speed signal during operation (S160) is refined as follows:

[0078] The total power of the air compressor is determined based on the speed signal during operation.

[0079] The energy consumption of the air compressor is determined based on the total power of the air compressor and the output power of the engine.

[0080] For details not covered in this embodiment, please refer to the above embodiments, which will not be repeated here.

[0081] refer to Figure 3 and Figure 4 As shown, the method includes:

[0082] S210, Export test data generated during road testing of commercial vehicles.

[0083] S220. When the brake cylinder pressure data at the current moment is greater than or equal to the brake cylinder pressure data at the next moment, determine the current moment as the start time of air compressor unloading.

[0084] S230. If the brake cylinder pressure data at the previous moment is less than the brake cylinder pressure data at the next moment within a preset time period, the previous moment is determined as the end time of air compressor unloading.

[0085] Specifically, when determining the start and end times of air compressor unloading, the current and next moment's brake cylinder pressure data are compared based on the acquired brake cylinder pressure data. If the current brake cylinder pressure is greater than or equal to the next moment's pressure, it indicates that the air compressor's brake cylinder pressure is decreasing or leveling off, thus determining that moment as the start time for air compressor unloading. After unloading begins, the previous and next moment's brake cylinder pressure data are compared again. If, within a preset time period, the previous moment's brake cylinder pressure is less than the next moment's pressure, it indicates that the air compressor's brake cylinder pressure is rising, signifying the end of air compressor unloading. The moment when the pressure begins to rise is determined as the end time for air compressor unloading.

[0086] S240. After the air compressor is unloaded, acquire the air compressor's operating data, which includes unloading data and working data.

[0087] S250: When the air compressor is working, acquire the current status signal of the commercial vehicle.

[0088] The current status signals for commercial vehicles include gear position signal, current speed signal, and accelerator pedal signal. The current speed signal can be obtained through a speed sensor, the gear position signal through a gear position sensor, and the accelerator pedal signal through an accelerator pedal sensor. Of course, other methods can also be used, depending on the actual situation, and are not limited here.

[0089] S260: Based on the gear position signal, accelerator pedal signal, and current speed signal, determine whether the commercial vehicle is in a coasting state or a normal driving state.

[0090] This step can be further broken down as follows: when the gear position signal is not in neutral, the accelerator pedal signal is 0, and the current speed signal is not 0, the commercial vehicle is determined to be in a coasting state; when the gear position signal is not in neutral, the accelerator pedal signal is not 0, and the current speed signal is not 0, the commercial vehicle is determined to be in a normal driving state.

[0091] Specifically, after acquiring the gear position signal, accelerator pedal signal, and current speed signal of the commercial vehicle, if the gear position signal is not in neutral, the accelerator pedal signal is 0, and the current speed signal is not 0, it indicates that the vehicle is in motion and the driver has released the accelerator but not the brake, and the transmission is in a non-neutral gear. In this case, the vehicle is coasting in gear. The engine speed will naturally decrease with the vehicle speed and the current gear, and the vehicle moves forward due to inertia. In this situation, the engine remains connected to the transmission and may continue to drive the air compressor, but the load is relatively small. If the gear position signal is not in neutral, the accelerator pedal signal is not 0, and the current speed signal is not 0, it indicates that the commercial vehicle is accelerating or traveling at a stable speed. In this case, the commercial vehicle is in a normal driving state. In this state, the engine needs to output corresponding power according to the vehicle's speed and load, which may include providing power to the air compressor.

[0092] S270: Based on the gear position signal and the current speed signal, determine whether the commercial vehicle is in neutral coasting or idling.

[0093] This step can be further broken down as follows: when the gear signal is in neutral and the current speed signal is not 0, the commercial vehicle is determined to be in neutral coasting mode; when the gear signal is in neutral and the current speed signal is 0, the commercial vehicle is determined to be in idling mode.

[0094] Specifically, when the gear signal is determined to be neutral and the current speed signal is not 0, it indicates that the driver has placed the transmission in neutral while the vehicle is in motion, allowing it to move forward solely by inertia. This indicates the commercial vehicle is in a coasting state. In this state, the engine is disengaged from the drive wheels, and the engine speed drops to idle or lower. Because the engine is disconnected from the transmission system, the air compressor will not be driven by the engine unless there is an independent power source. When the gear signal is determined to be neutral and the current speed signal is 0, it indicates the vehicle is stationary, but the engine is still running at its lowest speed (i.e., idling), such as when stopped waiting at a traffic light. In this case, the commercial vehicle is in an idling state. Although the engine does not generate propulsion at this time, it can still supply power or energy to auxiliary equipment such as the air compressor.

[0095] It is understandable that, after determining the operating status of a commercial vehicle, this operating status can be considered, to some extent, the operating status of an air compressor; therefore, they are integrated and plotted as follows: Figure 4 The bar chart shows that during the commercial vehicle road test, the percentage of the air compressor unloaded state was the highest, meaning the longest duration. When the air compressor was working, the vehicle was in neutral for the highest percentage of time, followed by normal operation (i.e., non-coasting operation) and coasting in gear. The percentage of the idling state was 0, meaning the commercial vehicle was always in a forward-moving state.

[0096] S280. When the commercial vehicle is working, determine the total power of the air compressor based on the speed signal of the air compressor during operation.

[0097] This step can be further broken down as follows: when the commercial vehicle is working, determine the unloading power of the air compressor based on the speed signal when the air compressor is unloading; determine the unloading work of the air compressor based on the unloading power; determine the working power of the air compressor based on the speed signal when the air compressor is working; determine the working work of the air compressor based on the working power; and determine the total power of the air compressor based on the unloading work and the working work.

[0098] Specifically, when a commercial vehicle is in normal operating condition, the air compressor's operating speed signal is used. This operating condition includes unloading and operating states, and the speed in the unloading state differs from that in the operating state. This speed signal can be obtained through methods including, but not limited to, speed sensors. After determining the speed in the unloading and operating states, a preset correspondence exists between the speed in the unloading state and the air compressor's unloading power. Therefore, after determining the speed signal during unloading, the air compressor's unloading power can be determined based on this correspondence. Similarly, a preset correspondence exists between the speed in the operating state and the air compressor's operating power. Therefore, after determining the speed signal during operating states, the air compressor's operating power can be determined based on this correspondence. Multiplying the air compressor's unloading power by the corresponding time yields the air compressor's unloading work, and multiplying the air compressor's operating power by the corresponding time yields the air compressor's operating work. The time can be obtained by multiplying the duration between the next and previous moments by the number of moments. In addition, after determining the unloading work and the working work, the total power of the air compressor can be obtained by adding the unloading work and the working work of the air compressor.

[0099] S290: Obtain the engine speed signal and the engine torque signal.

[0100] The engine speed signal can be acquired, but is not limited to, through a speed sensor. The torque signal can be acquired, but is not limited to, through a torque sensor.

[0101] S300 determines the engine's output power based on the speed and torque signals.

[0102] Specifically, after determining the engine speed and torque signals, the engine output power can be determined based on the map diagram, i.e., the correspondence diagram, between engine speed, torque, and output power.

[0103] S310. Determine the energy consumption of the air compressor based on the total power of the air compressor and the output power of the engine.

[0104] This step can be further broken down as follows: the ratio of the total output power of the air compressor to that of the engine is determined as the energy consumption of the air compressor.

[0105] Specifically, after determining the total power of the air compressor and the output power of the engine, the energy consumption of the air compressor can be obtained by dividing the total power of the air compressor by the output power of the engine. The method is simple and easy to operate.

[0106] The technical solution of this invention determines the air compressor unloading start time by comparing the brake cylinder pressure data at the current moment with the brake cylinder pressure data at the next moment; and determines the previous moment as the air compressor unloading end time by comparing the brake cylinder pressure data at the previous moment with the brake cylinder pressure data at the next moment within a preset time period. It also determines whether the commercial vehicle is in a coasting state or a normal driving state based on the gear position signal, accelerator pedal signal, and current speed signal; whether the commercial vehicle is in a coasting state or an idling state based on the gear position signal and current speed signal; the total power of the air compressor is determined based on the air compressor's operating speed signal; and the energy consumption of the air compressor is determined based on the total power of the air compressor and the engine's output power. By comparing the brake cylinder pressure data at the previous and next moments, the unloading and end times of the air compressor are accurately determined, as are the vehicle's operating state and the air compressor's energy consumption. This improves the energy efficiency and safety of the air compressor and provides a good foundation for the subsequent formal operation of the commercial vehicle.

[0107] Based on the same inventive concept Figure 5 This is a schematic diagram of a device for determining the energy consumption of an air compressor in a commercial vehicle, provided in an embodiment of the present invention. This device is used to execute the aforementioned method for determining the energy consumption of an air compressor in a commercial vehicle. (Refer to...) Figure 5 As shown, the method includes:

[0108] Data export module 110 is used to export test data generated during road testing of commercial vehicles. The test data includes at least brake cylinder pressure data.

[0109] The unloading time determination module 120 is used to determine the start and end times of unloading the air compressor based on the brake cylinder pressure data at the current moment and the brake cylinder pressure data at the next moment.

[0110] The data acquisition module 130 is used to acquire the operating data of the air compressor after the air compressor is unloaded. The operating data includes unloading data and working data.

[0111] The signal acquisition module 140 is used to acquire the current status signal of the commercial vehicle when the air compressor is working;

[0112] The status determination module 150 is used to determine the working status of the commercial vehicle based on the current status signal;

[0113] The energy consumption determination module 160 is used to determine the energy consumption of the air compressor based on the speed signal of the air compressor during operation when the commercial vehicle is working.

[0114] The commercial vehicle air compressor energy consumption determination device provided in this embodiment of the invention can execute the commercial vehicle air compressor energy consumption determination method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0115] Optionally, the unloading time determination module 120 can also be configured to: determine the current time as the start time of air compressor unloading when the brake cylinder pressure data at the current time is greater than or equal to the brake cylinder pressure data at the next time; and determine the previous time as the end time of air compressor unloading when the brake cylinder pressure data at the previous time is less than the brake cylinder pressure data at the next time within a preset time period.

[0116] Optionally, when the current status signal of the commercial vehicle includes the gear position signal, the current speed signal, and the accelerator pedal signal, the status determination module 150 can also be configured to: determine whether the commercial vehicle is in a coasting state or a normal driving state based on the gear position signal, the accelerator pedal signal, and the current speed signal; and determine whether the commercial vehicle is in a coasting state or an idling state based on the gear position signal and the current speed signal.

[0117] Optionally, the status determination module 150 can also be configured to: determine that the commercial vehicle is in a coasting state when the gear position signal is not in neutral, the accelerator pedal signal is 0, and the current speed signal is not 0; and determine that the commercial vehicle is in a normal driving state when the gear position signal is not in neutral, the accelerator pedal signal is not 0, and the current speed signal is not 0.

[0118] Optionally, the status determination module 150 can also be configured to: determine that the commercial vehicle is in neutral coasting state when the gear signal is in neutral and the current speed signal is not 0; and determine that the commercial vehicle is in idling state when the gear signal is in neutral and the current speed signal is 0.

[0119] Optionally, the energy consumption determination module 160 can also be configured to: determine the total power of the air compressor based on the speed signal during air compressor operation; and determine the energy consumption of the air compressor based on the total power of the air compressor and the output power of the engine.

[0120] Optionally, the energy consumption determination module 160 can also be configured to: determine the unloading power of the air compressor based on the speed signal when the air compressor is unloading; determine the unloading work of the air compressor based on the unloading power; determine the working power of the air compressor based on the speed signal when the air compressor is working; determine the working work of the air compressor based on the working power; and determine the total power of the air compressor based on the unloading work and the working work.

[0121] Optionally, the device further includes: a power determination module for acquiring engine speed signals and engine torque signals; and determining the engine output power based on the speed signals and torque signals.

[0122] Optionally, the energy consumption determination module 160 can also be configured to determine the energy consumption of the air compressor as the ratio of the total output power of the air compressor to that of the engine.

[0123] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0124] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining the energy consumption of an air compressor in a commercial vehicle, characterized in that, include: Export the test data generated during the road test of the commercial vehicle, the test data including at least the brake cylinder pressure data; Based on the brake cylinder pressure data at the current moment and the brake cylinder pressure data at the next moment, determine the start and end times of unloading the air compressor; After the air compressor is unloaded, the operating data of the air compressor is acquired, including unloading data and working data; When the air compressor is working, the current status signal of the commercial vehicle is acquired; The operating status of the commercial vehicle is determined based on the current status signal; The energy consumption of the air compressor is determined based on the rotational speed signal of the air compressor during operation of the commercial vehicle.

2. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 1, characterized in that, Based on the brake cylinder pressure data at the current moment and the brake cylinder pressure data at the next moment, determine the start and end times of unloading the air compressor, including: If the brake cylinder pressure data at the current moment is greater than or equal to the brake cylinder pressure data at the next moment, then the current moment is determined as the start time for unloading the air compressor. If the pressure data of the brake cylinder at the previous moment is less than the pressure data of the brake cylinder at the next moment within a preset time period, then the previous moment is determined to be the unloading end time of the air compressor.

3. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 1, characterized in that, The current status signals of the commercial vehicle include gear signal, current speed signal, and accelerator pedal signal; Determining the operating status of the commercial vehicle based on the current status signal includes: Based on the gear position signal, the accelerator pedal signal, and the current speed signal, it is determined whether the commercial vehicle is in a coasting state or a normal driving state. Based on the gear position signal and the current speed signal, it is determined whether the commercial vehicle is in neutral coasting or idling.

4. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 3, characterized in that, Determining whether the commercial vehicle is in a coasting state or a normal driving state based on the gear position signal, the accelerator pedal signal, and the current speed signal includes: When the gear signal is not in neutral, the accelerator pedal signal is 0, and the current speed signal is not 0, the commercial vehicle is determined to be in a coasting state with gear. When the gear position signal is not neutral, the accelerator pedal signal is not 0, and the current speed signal is not 0, the commercial vehicle is determined to be in normal driving condition.

5. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 3, characterized in that, Determining whether the commercial vehicle is in neutral coasting or idling based on the gear position signal and the current speed signal includes: When the gear signal is in neutral and the current speed signal is not 0, it is determined that the commercial vehicle is in neutral coasting mode. When the gear signal is in neutral and the current speed signal is 0, the commercial vehicle is determined to be in an idling state.

6. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 1, characterized in that, Determining the energy consumption of the air compressor based on the speed signal during operation includes: The total power of the air compressor is determined based on the speed signal during operation. The energy consumption of the air compressor is determined based on the total power of the air compressor and the output power of the engine.

7. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 6, characterized in that, The total power of the air compressor is determined based on the speed signal during operation, including: The unloading power of the air compressor is determined based on the rotational speed signal when the air compressor is unloaded. The unloading power of the air compressor is determined based on its unloading power. The working power of the air compressor is determined based on the speed signal of the air compressor during operation; The working power of the air compressor is determined based on its working power. The total power of the air compressor is determined based on the unloading work and the working work.

8. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 6, characterized in that, Before determining the energy consumption of the air compressor based on its total power and the engine's output power, the following steps are also included: Acquire the engine speed signal and the engine torque signal; The output power of the engine is determined based on the speed signal and the torque signal.

9. The method for determining the energy consumption of a commercial vehicle air compressor according to claim 6, characterized in that, The energy consumption of the air compressor is determined based on its total power output and the engine's output power, including: The ratio of the total output power of the air compressor to the output power of the engine is defined as the energy consumption of the air compressor.

10. A device for determining the energy consumption of an air compressor in a commercial vehicle, characterized in that, include: The data export module is used to export the test data generated by the commercial vehicle during road testing, and the test data includes at least the brake cylinder pressure data. The unloading time determination module is used to determine the start and end times of unloading the air compressor based on the brake cylinder pressure data at the current moment and the brake cylinder pressure data at the next moment. The data acquisition module is used to acquire the operating data of the air compressor after the air compressor is unloaded, and the operating data includes unloading data and working data. The signal acquisition module is used to acquire the current status signal of the commercial vehicle when the air compressor is working; The status determination module is used to determine the working status of the commercial vehicle based on the current status signal. An energy consumption determination module is used to determine the energy consumption of the air compressor based on the speed signal of the air compressor during operation when the commercial vehicle is working.

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