An auxiliary braking method based on an air compressor and related device

Abstract

The application provides an air compressor-based auxiliary braking method and related device, and relates to the field of auxiliary braking.In the application, when the engine meets normal driving conditions, the opening degree of the brake valve is the maximum opening degree.If the engine torque is less than a preset torque threshold and the auxiliary braking switch is turned on, the target brake valve opening degree less than the maximum opening degree is determined based on the engine speed, and the brake valve is controlled to make corresponding angle adjustment.As the opening degree of the brake valve decreases, the resistance to the air compressor pump increases, the force required by the air compressor to compress air immediately increases, the tangential force on the crankshaft gear increases, the tangential force on the crankshaft gear increases, the brake force is provided for the crankshaft gear, and the auxiliary braking effect is achieved through the crankshaft gear.In the application, the engine auxiliary braking and the air compressor auxiliary braking are combined, the auxiliary braking efficiency is improved, and the auxiliary braking effect is improved.

Description

Technical Field

[0001] This invention relates to the field of auxiliary braking, and more specifically, to an auxiliary braking method and related apparatus based on an air compressor. Background Technology

[0002] Engine-assisted braking refers to using engine braking by lifting the accelerator pedal without depressing the clutch, utilizing the compression resistance generated by the engine's compression stroke, internal friction, and intake and exhaust resistance to apply braking force to the drive wheels. However, in practical applications, engine-assisted braking has low efficiency and poor braking effect. Summary of the Invention

[0003] In view of this, the present invention provides an auxiliary braking method and related device based on an air compressor to solve the problems of low auxiliary braking efficiency and poor auxiliary braking effect of the engine.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An auxiliary braking method based on an air compressor is applied to a controller. In the air compressor auxiliary braking system where the controller is located, a brake valve for regulating gas flow in the air circuit is configured between the air compressor and the air tank. When the engine meets normal operating conditions, the brake valve is at its maximum opening. The air compressor-based auxiliary braking method includes:

[0006] Detect engine torque and engine speed;

[0007] If the engine torque is less than a preset torque threshold and the auxiliary brake switch is turned on, a target brake valve opening less than the maximum opening is determined based on the engine speed.

[0008] Adjust the opening degree of the brake valve to the target brake valve opening degree.

[0009] Optionally, determining a target brake valve opening less than the maximum opening based on the engine speed includes:

[0010] Obtain a pre-configured target curve, which represents the relationship between the brake valve opening and the engine speed; in the target curve, when the engine speed is less than a preset speed threshold, the brake valve opening is zero.

[0011] The target brake valve opening corresponding to the engine speed is determined from the target curve; the target brake valve opening is less than the maximum opening.

[0012] Optionally, if the engine torque is less than a preset torque threshold and the auxiliary braking switch is not activated, the method further includes:

[0013] Detect the internal pressure of the gas storage tank;

[0014] If the internal pressure is less than the preset minimum pressure threshold, adjust the opening of the brake valve to the maximum opening.

[0015] Optionally, if the internal pressure is not less than a preset minimum pressure threshold, the method further includes:

[0016] The reference brake valve opening is determined based on the engine speed, so that the opening of the brake valve is adjusted to the reference brake valve opening.

[0017] Optionally, if the engine torque is greater than a preset torque threshold, the method further includes:

[0018] Adjust the opening of the brake valve to its maximum opening.

[0019] Optionally, the air compressor auxiliary braking system further includes a safety valve arranged in parallel with the brake valve; during or after adjusting the opening of the brake valve to the target brake valve opening, it further includes:

[0020] Detect the air pressure of the air compressor;

[0021] If the air pressure is greater than the preset air pressure value, the safety valve is opened; the preset air pressure value is less than the withstand pressure of the air compressor.

[0022] Optionally, the diameter α of the brake valve is not less than the diameter β of the air passages connected to both ends of the brake valve, and the bend angle of the air passages of the brake valve is greater than 90° when they are arranged.

[0023] An auxiliary braking device based on an air compressor is applied to a controller. In the air compressor auxiliary braking system where the controller is located, a brake valve for regulating the gas flow rate in the air circuit is configured between the air compressor and the air tank. When the engine meets normal operating conditions, the brake valve is at its maximum opening. The air compressor-based auxiliary braking device includes:

[0024] The engine speed detection module is used to detect engine torque and engine speed;

[0025] The opening degree determination module is used to determine a target brake valve opening degree that is less than the maximum opening degree based on the engine speed if the engine torque is less than a preset torque threshold and the auxiliary brake switch is turned on.

[0026] An opening adjustment module is used to adjust the opening of the brake valve to the target brake valve opening.

[0027] An electronic device includes at least one processor and a memory connected to the processor, wherein:

[0028] The memory is used to store computer programs;

[0029] The processor is used to execute the computer program so that the electronic device can implement the above-described air compressor-based auxiliary braking method.

[0030] A computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the above-described air compressor-based auxiliary braking method.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention provides an auxiliary braking method and related device based on an air compressor. In this invention, when the engine meets normal driving conditions, the brake valve is at its maximum opening. If the engine torque is less than a preset torque threshold and the auxiliary braking switch is activated, a target brake valve opening less than the maximum opening is determined based on the engine speed. The brake valve is then adjusted accordingly. As the brake valve opening decreases, the resistance encountered by the air compressor during pumping increases, and the force required for the air compressor to compress air immediately increases. Consequently, the tangential force on the air compressor gears increases, leading to an increase in the tangential force on the crankshaft gears, providing braking force to the crankshaft gears. This achieves the auxiliary braking effect through the crankshaft gears. This invention combines engine-assisted braking and air compressor-assisted braking to improve auxiliary braking efficiency and thus enhance the auxiliary braking effect. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 A schematic diagram of an air compressor piping structure provided for the prior art;

[0035] Figure 2 An auxiliary braking arrangement diagram for an air compressor is provided in an embodiment of the present invention;

[0036] Figure 3 A flowchart illustrating an auxiliary braking method based on an air compressor, provided as an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of gear operation provided in an embodiment of the present invention;

[0038] Figure 5A flowchart illustrating a method for determining the opening degree provided in an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of a target curve provided for an embodiment of the present invention;

[0040] Figure 7 A flowchart of another auxiliary braking method based on an air compressor provided in an embodiment of the present invention;

[0041] Figure 8 A schematic diagram of an auxiliary braking device based on an air compressor provided in an embodiment of the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0044] Engine-assisted braking refers to using engine braking to lift the accelerator pedal without depressing the clutch, utilizing the compression resistance generated by the engine's compression stroke, internal friction, and intake and exhaust resistance to create a braking effect on the drive wheels.

[0045] However, in practical applications, relying solely on engine-assisted braking results in low efficiency and poor braking performance.

[0046] In order to improve the efficiency of engine-assisted braking, this embodiment combines engine-assisted braking and air compressor-assisted braking to improve the efficiency of auxiliary braking and thus improve the auxiliary braking effect.

[0047] An air compressor is a device used to compress gas, converting mechanical energy into pressure energy. In this embodiment, the air compressor is used in vehicle braking systems. Its internal compression structure is basically piston-type, driven by the engine gear system to provide mechanical energy, which is then converted into pressure energy through piston compression and stored in the vehicle's air tank.

[0048] In this embodiment, a brake valve is used to enable the air compressor to compress gas and generate negative work, thereby achieving the purpose of assisting engine braking.

[0049] Based on the above, one embodiment of the present invention provides an auxiliary braking method based on an air compressor, wherein the executing entity is a controller, such as an ECU (electronic control unit).

[0050] This controller is located in the air compressor's auxiliary braking system. (Refer to...) Figure 1 Currently, the air compressor piping structure is as follows: Figure 1 As shown. Among them, Figure 1 All the connecting lines are related to the air compressor's air circuit pipelines.

[0051] Outside air enters the air path after being filtered by an air filter. A portion of it is directed to the air compressor, which compresses the air. After passing through a dryer and other equipment, the compressed air is stored in a receiver tank. The remaining portion is turbocharged and then fed into the engine for combustion, providing kinetic energy.

[0052] exist Figure 1 Based on the existing structure, to enrich the actual functions of the air compressor, the original pipeline layout (see...) was modified. Figure 1 Based on the above, an exhaust brake valve (hereinafter referred to as brake valve) is added at the air outlet of the air compressor. For specific optimized pipeline layout, see [link to relevant documentation]. Figure 2 The air compressor auxiliary braking layout diagram provides auxiliary braking force to the engine, and an air compressor auxiliary braking system was developed for this purpose. (Refer to...) Figure 2 The air compressor auxiliary braking system includes an air compressor, air compressor gears, brake valves, safety valves, electronic control unit, and crankshaft gears.

[0053] The system includes a brake valve that regulates the gas flow rate within the air circuit, located between the air compressor and the air tank. More specifically, the brake valve can be positioned between the air compressor and the drying tank, and in practical applications, it can be implemented using an electronic valve.

[0054] The brake valve has air lines connected to both ends, and correspondingly, the safety valve has air lines connected to both ends, achieving the effect of having the brake valve and safety valve installed in parallel. In practice, the safety valve can be positioned above the brake valve.

[0055] The brake valve is used to regulate the flow rate of gas from the air compressor into the air tank. A larger valve opening results in a larger flow rate, while a smaller opening results in a smaller flow rate. In practical applications, the brake valve can be adjusted to multiple positions to provide different braking forces for different operating conditions. Simultaneously, the brake valve pipe diameter α must be no less than the pipe diameter β of the air passages connected at both ends, and the pipe bend angle during air passage layout must be greater than 90° to prevent obstructed gas flow. Figure 2 The bending angle shown is slightly greater than 90°. In actual installation, a larger angle can be used.

[0056] The safety valve, which is set in parallel with the brake valve, is used to bypass excess compressed air to the air tank when the air compressor's pumping pressure is high, ensuring the reliability of the air compressor and preventing exhaust gas from being discharged into the atmosphere.

[0057] Under normal driving conditions, the brake valve is in the normally open state, meaning that when the engine meets normal driving conditions, the brake valve is at its maximum opening. At this time, the flow rate at the brake valve is at its maximum, allowing the air output from the air compressor to flow smoothly into the air tank, thus ensuring the pneumatic function of equipment such as doors.

[0058] In engine-assisted braking mode, reducing the opening of the brake valve increases the resistance encountered by the air compressor during pumping. This immediately increases the force required for the air compressor to compress the air, consequently increasing the tangential force on the air compressor gears. This, in turn, increases the tangential force on the crankshaft gears, providing braking force to the crankshaft gears and achieving the auxiliary braking effect. This invention combines engine-assisted braking and air compressor-assisted braking to improve auxiliary braking efficiency and thus enhance the auxiliary braking effect.

[0059] Based on the structure of the aforementioned air compressor auxiliary braking system, and referring to Figure 3 The auxiliary braking method based on the air compressor may include:

[0060] S11, Detect engine torque and engine speed.

[0061] In this embodiment, since it is necessary to use a combination of engine-assisted braking and air compressor-assisted braking, air compressor-assisted braking is only performed simultaneously when the engine is activated and meets the conditions for auxiliary braking.

[0062] Whether the engine auxiliary control is satisfied is determined by the engine torque t; therefore, it is necessary to detect the engine torque t. The engine torque t can be measured dynamically.

[0063] The dynamic measurement method involves using sensors mounted on the engine crankshaft to monitor the engine's torque and speed in real time. This data is then transmitted to an onboard computer or external device for analysis and processing to obtain the engine's transient torque. This method can measure the engine's torque output under different operating conditions in real time.

[0064] In addition, different engine speeds (n) will result in different air pressures inside the air compressor, affecting the opening of the subsequent brake valve. Therefore, it is also necessary to detect the engine speed (n). The engine speed (n) can be detected by a sensor.

[0065] S12. If the engine torque is less than a preset torque threshold and the auxiliary brake switch is turned on, determine a target brake valve opening that is less than the maximum opening based on the engine speed.

[0066] Specifically, if the engine torque t is less than the preset torque threshold 0, it indicates that the engine is performing negative work and meets the conditions for auxiliary braking. At this time, a prompt message is output to remind the user to activate the auxiliary braking switch. In this embodiment, the auxiliary braking switch refers to the engine auxiliary braking switch, which is only used to control whether the engine auxiliary braking function is activated.

[0067] If the user activates the auxiliary braking switch, the engine enters auxiliary braking mode, meaning that the engine auxiliary braking function is activated and the engine is performing auxiliary braking operations. Currently, the vehicle's engine auxiliary braking relies on compressed air within the engine cylinders to provide braking force. This braking force acts on the crankshaft, which is connected to the vehicle's transmission system, thus providing braking force to the transmission system and achieving the auxiliary braking function.

[0068] When the engine assists braking, the air compressor assists braking is activated simultaneously. The engine assists braking relies on the compressed air in the engine cylinder to provide braking force, while the air compressor assists braking relies on the compressed air in the air compressor to provide braking force. The braking forces provided by these two sources work together on the crankshaft to ultimately assist the vehicle in decelerating.

[0069] Since different engine speeds (n) result in varying air pressures inside the air compressor, affecting the opening of the subsequent brake valve, the target brake valve opening needs to be determined based on the engine speed (n). If the target brake valve opening is less than the maximum opening, the brake valve needs to be partially closed to achieve auxiliary braking of the air compressor due to the reduced opening.

[0070] Specifically, refer to Figure 4 When the engine meets the auxiliary braking requirements and the auxiliary braking switch is activated, the system determines that the engine has entered the auxiliary braking state and simultaneously enters the air compressor auxiliary braking strategy. At the same time, the engine speed n is monitored. The electronic control unit (ECU) controls the air compressor's rear brake valve to close to different opening degrees x (when n>n1, x is controlled to be greater than x1 to prevent excessive pressure in the air compressor cylinders, which could lead to air compressor malfunction). The air compressor compresses air to provide a negative torque acting on the engine (positive torque refers to the work output by the engine, specifically the crankshaft gear driving the air compressor gear, while negative torque refers to the work done by the external system on the engine, specifically the air compressor gear driving the crankshaft gear), providing a certain braking torque to assist engine braking. The principle of air compressor auxiliary braking is as follows:

[0071] Under normal engine operation, combustion generates power, driving the crankshaft gear to rotate. The crankshaft gear then drives the air compressor gear to rotate, which in turn drives the air compressor to compress air into the air tank. (Refer to...) Figure 4Here, we simplify the situation to a direct connection between the crankshaft gear and the air compressor gear. The crankshaft gear rotates in the direction of ω1, and the air compressor gear rotates in the direction of ω2. Analyzing the forces at the gear contact point, the crankshaft gear is subjected to a radial force Fr1 and a tangential force Ft1, while the air compressor gear is subjected to a radial force Fr2 and a tangential force Ft2. Simultaneously, Ft1 = Ft2, and Ft2 is used to drive the air compressor to compress air. When the air compressor's rear brake valve is closed or reduced, the resistance encountered by the air compressor during pumping increases, causing the force required for the air compressor to compress air to increase immediately. This leads to an increase in the required Ft2, and Ft1 increases simultaneously, meaning the crankshaft gear experiences increased force, thereby providing a certain braking force.

[0072] S13. Adjust the opening degree of the brake valve to the target brake valve opening degree.

[0073] In practical implementation, the ECU sends a valve adjustment command, including the target brake valve opening degree, through a communication line with the brake valve. This causes the brake valve to respond to the command and perform a corresponding opening adjustment operation. In this embodiment, the opening degree is reduced to achieve auxiliary braking of the air compressor; the implementation principle is described above.

[0074] In this embodiment, when the engine meets normal driving conditions, the brake valve is at its maximum opening. If the engine torque is less than a preset torque threshold and the auxiliary brake switch is activated, a target brake valve opening less than the maximum opening is determined based on the engine speed. The brake valve is then adjusted accordingly. As the brake valve opening decreases, the resistance encountered by the air compressor during pumping increases, and the force required for the air compressor to compress air immediately increases. Consequently, the tangential force on the air compressor gears increases, leading to an increase in the tangential force on the crankshaft gears. This provides braking force to the crankshaft gears, achieving the auxiliary braking effect through the crankshaft gears. In this invention, engine auxiliary braking and air compressor auxiliary braking are combined to improve auxiliary braking efficiency and thus enhance the auxiliary braking effect.

[0075] In another implementation of the present invention, a specific implementation of "determining a target brake valve opening less than the maximum opening based on the engine speed" is provided, referring to... Figure 5 It can include:

[0076] S21. Obtain the pre-configured target curve.

[0077] The target curve represents the relationship between the brake valve opening and the engine speed, and this target curve is referenced... Figure 6As shown, in the target curve, the horizontal axis represents engine speed, and the vertical axis represents the brake valve opening. When the engine speed is less than the preset speed threshold (C), the brake valve opening is zero. This is because when the engine speed is low, the air compressor's internal pressure is low, and closing the brake valve has a smaller impact on the air compressor. Therefore, the brake valve can be closed to provide greater braking force.

[0078] When the speed is greater than c, the air pressure inside the air compressor increases with the increase of speed. At this time, in order to prevent the pressure inside the air compressor cylinder from being too high and causing the air compressor to malfunction, the opening of the brake valve will continuously increase with the increase of speed. That is, the speed is directly proportional to the opening of the brake valve. When the speed is large, in order to ensure the safety of the air compressor, the opening of the brake valve will be 100%, that is, the brake valve is fully open.

[0079] S22. Determine the target brake valve opening degree corresponding to the engine speed from the target curve; the target brake valve opening degree is less than the maximum opening degree.

[0080] In this embodiment, the collected engine speed is used as the horizontal axis, and the vertical axis corresponding to the horizontal axis in the curve is queried. The value of the vertical axis is the target brake valve opening, such as 80%. Under normal circumstances, the target brake valve opening is less than the maximum opening.

[0081] In this embodiment, a target curve is pre-configured, and the opening degree of the brake valve can be determined directly by querying the curve. This method is simple to operate and highly efficient.

[0082] In another implementation of the present invention, if the engine torque is less than a preset torque threshold and the auxiliary brake switch is not activated (i.e., the user has not activated the auxiliary brake switch), the decision to activate the air compressor auxiliary brake can be made based on the pressure of the air tank. In this case, the internal pressure of the air tank can be detected by a pressure sensor. If the internal pressure is less than a preset minimum pressure threshold, it indicates that the amount of gas in the air tank is low, potentially leading to insufficient gas supply to external devices. Therefore, the brake valve opening is adjusted to its maximum to prioritize the air supply to the air tank, and the air compressor auxiliary brake function is not provided.

[0083] If the internal pressure is not less than the preset minimum pressure threshold, it indicates that there is a sufficient amount of gas in the air tank to provide enough gas for external equipment. In this case, closing or partially closing the brake valve will not affect the air supply capacity of the air tank. Therefore, the brake valve can be closed or partially closed to provide auxiliary braking function for the air compressor.

[0084] Specifically, the opening degree of the reference brake valve can be determined based on the engine speed, so as to adjust the opening degree of the brake valve to the reference brake valve opening degree.

[0085] In this embodiment, the reference brake valve opening is similar to the target brake valve opening mentioned above, both achieved through... Figure 6 Once the target curve is determined, when the rotational speed is the same, the opening degree of the reference brake valve is the same as the opening degree of the target brake valve, and the subsequent adjustment process of the brake valve is as described above.

[0086] In another implementation of the present invention, during or after adjusting the opening of the brake valve to the target brake valve opening, the resistance encountered by the air compressor during pumping increases due to the partial or complete closure of the brake valve. This immediately increases the force required for the air compressor to compress the air, resulting in an increase in the internal air pressure of the air compressor. If the internal pressure of the air compressor is too high, it will cause the air compressor to malfunction. Therefore, a safety valve is used to regulate the internal pressure of the air compressor.

[0087] Specifically, the air compressor's pumping pressure is detected by a pressure sensor. If the pumping pressure exceeds a preset pressure value 'a', the safety valve is opened to bypass excess compressed air to the air tank, ensuring the air compressor's reliability and preventing exhaust gas from being released into the atmosphere. It should be noted that adjusting the safety valve is similar to adjusting the brake valve.

[0088] The preset air pressure value a is slightly less than the air compressor's withstand pressure b, in order to avoid the air compressor's internal pressure reaching the withstand pressure and causing air compressor failure, thus ensuring withstand reliability and braking efficiency.

[0089] In this embodiment, if there is enough gas stored in the air tank when the engine auxiliary braking is not activated, the air compressor auxiliary braking can be activated to accelerate braking efficiency and improve braking effect.

[0090] In another implementation of the present invention, if the initially detected engine torque is greater than a preset torque threshold, or if the detected engine torque is greater than a preset torque threshold during air compressor auxiliary braking based on the air tank pressure, it indicates that the engine does not meet the auxiliary braking conditions at this time. In this case, engine auxiliary braking is not required, but air compressor auxiliary braking is required. Therefore, the opening of the brake valve is adjusted to the maximum opening to provide a larger flow of gas to the air tank.

[0091] In another implementation of the present invention, the overall process of the air compressor auxiliary braking in the present invention is given, referring to... Figure 7. Specifically, the ECU reads the engine speed n and torque t in real time: When the detected torque t < 0, if the user turns on the auxiliary braking switch, the engine auxiliary braking is entered, and at the same time, the air compressor auxiliary braking strategy is entered. When n ≥ c, the curve of the control braking valve opening x changing with the speed n is n - x (which needs to be calibrated in advance). When n < c, x can be fully closed (i.e., 0) until the engine exits the auxiliary braking state. When not in the braking state, it is detected whether the air storage tank pressure f meets the requirements. If f < g (the minimum pressure requirement), the braking valve is controlled to open and remain常开 to avoid affecting the positive power of the engine and ensure the air charging efficiency. When f ≥ g, if n ≥ c, the curve of the control braking valve opening x changing with the speed n is used for opening control; when n < c, x can be fully closed (i.e., 0). When the detected torque t > 0, the air compressor braking state is exited, that is, the braking valve is fully open. For the specific logic control diagram, see Figure 7 .

[0092] In this embodiment, by adding simple devices such as braking valves and setting relevant strategies, the compression energy of the air compressor is directly converted into the braking work required by the engine, realizing the air compressor auxiliary braking function, improving the energy use efficiency, and optimizing the user experience.

[0093] Based on the above embodiment of the auxiliary braking method based on the air compressor, another embodiment of the present invention provides an auxiliary braking device based on the air compressor, which is applied to a controller. In the air compressor auxiliary braking system where the controller is located, a braking valve for regulating the gas flow in the air path is configured between the air compressor and the air storage tank; when the engine meets the normal driving conditions, the opening of the braking valve is the maximum opening; Refer to Figure 8 , the auxiliary braking device based on the air compressor includes:

[0094] A speed detection module 11 for detecting the engine torque and engine speed;

[0095] An opening determination module 12 for determining a target braking valve opening less than the maximum opening based on the engine speed if the engine torque is less than a preset torque threshold and the auxiliary braking switch is turned on;

[0096] An opening adjustment module 13 for adjusting the opening of the braking valve to the target braking valve opening.

[0097] In one implementation, the opening determination module 12 includes:

[0098] A curve acquisition sub-module for acquiring a pre-configured target curve, where the target curve represents the correlation between the braking valve opening and the engine speed; in the target curve, when the engine speed is less than a preset speed threshold, the braking valve opening is zero;

[0099] The opening degree determination submodule is used to determine the target brake valve opening degree corresponding to the engine speed from the target curve; the target brake valve opening degree is less than the maximum opening degree.

[0100] One implementation also includes:

[0101] The first pressure detection module is used to detect the internal pressure of the air tank if the engine torque is less than a preset torque threshold and the auxiliary brake switch is not activated.

[0102] The opening adjustment module 13 is also used to adjust the opening of the brake valve to the maximum opening if the internal pressure is less than a preset minimum pressure threshold.

[0103] In one implementation, the opening determination module 12 is further configured to determine a reference brake valve opening based on the engine speed if the internal pressure is not less than a preset minimum pressure threshold, so as to adjust the opening of the brake valve to the reference brake valve opening.

[0104] In one implementation, the opening adjustment module 13 is also used for:

[0105] If the engine torque is greater than a preset torque threshold, the opening of the brake valve is adjusted to the maximum opening.

[0106] In one implementation, the air compressor auxiliary braking system further includes a safety valve arranged in parallel with the brake valve; the air compressor-based auxiliary braking device further includes:

[0107] The second pressure detection module is used to detect the air pressure of the air compressor;

[0108] The opening adjustment module 13 is also used to control the safety valve to open if the air pressure is greater than the preset air pressure value; the preset air pressure value is less than the withstand pressure of the air compressor.

[0109] In one implementation, the diameter α of the brake valve is not less than the diameter β of the air passages connected to both ends of the brake valve, and the bend angle of the air passages of the brake valve is greater than 90° when they are arranged.

[0110] In this embodiment, when the engine meets normal driving conditions, the brake valve is at its maximum opening. If the engine torque is less than a preset torque threshold and the auxiliary brake switch is activated, a target brake valve opening less than the maximum opening is determined based on the engine speed. The brake valve is then adjusted accordingly. As the brake valve opening decreases, the resistance encountered by the air compressor during pumping increases, and the force required for the air compressor to compress air immediately increases. Consequently, the tangential force on the air compressor gears increases, leading to an increase in the tangential force on the crankshaft gears. This provides braking force to the crankshaft gears, achieving the auxiliary braking effect through the crankshaft gears. In this invention, engine auxiliary braking and air compressor auxiliary braking are combined to improve auxiliary braking efficiency and thus enhance the auxiliary braking effect.

[0111] It should be noted that the working process of each module and sub-module in this embodiment is described in the corresponding descriptions in the above embodiments, and will not be repeated here.

[0112] This application also provides an electronic device in its embodiments. (See reference...) Figure 9 The diagram illustrates a structural schematic suitable for implementing the electronic device in the embodiments of this application. The electronic device in the embodiments of this application may include, but is not limited to, fixed terminals such as ECUs, mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Figure 9 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0113] like Figure 9 As shown, the electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage device 608 into a random access memory (RAM) 603 to implement the aforementioned auxiliary braking method based on an air compressor. When the electronic device is powered on, the RAM 603 also stores various programs and data required for the operation of the electronic device. The processing unit 601, ROM 602, and RAM 603 are interconnected via a bus 604. An input / output (I / O) interface 605 is also connected to the bus 604.

[0114] Typically, the following devices can be connected to I / O interface 605: input devices 606 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 607 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 608 including, for example, memory cards, hard drives, etc.; and communication devices 609. Communication device 609 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 9 Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown. More or fewer devices may be implemented or have alternatively.

[0115] This application also provides a computer program product including computer-readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the air compressor-based auxiliary braking methods provided in this application.

[0116] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the air compressor-based auxiliary braking methods provided in this application.

[0117] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An auxiliary braking method based on an air compressor, characterized in that, Applied to the controller, in the air compressor auxiliary braking system where the controller is located, a brake valve is configured between the air compressor and the air tank to regulate the gas flow in the air circuit; the air compressor gear is driven by the engine crankshaft gear; When the engine meets normal driving conditions, the brake valve is at its maximum opening. The air compressor-based auxiliary braking method includes: Detect engine torque and engine speed; If the engine torque is less than a preset torque threshold and the auxiliary braking switch is activated, a target brake valve opening less than the maximum opening is determined based on the engine speed; wherein, the auxiliary braking switch is used to control whether the engine auxiliary braking function is activated. Adjust the opening degree of the brake valve to the target brake valve opening degree; The step of determining a target brake valve opening less than the maximum opening based on the engine speed includes: acquiring a pre-configured target curve, the target curve representing the correlation between the brake valve opening and the engine speed; in the target curve, when the engine speed is less than a preset speed threshold, the brake valve opening is zero, and when the engine speed is greater than the preset speed threshold, the brake valve opening is proportional to the engine speed; and determining the target brake valve opening corresponding to the engine speed from the target curve. If the engine torque is less than a preset torque threshold and the auxiliary brake switch is not activated, the internal pressure of the air tank is detected; if the internal pressure is less than a preset minimum pressure threshold, the opening of the brake valve is adjusted to the maximum opening; if the internal pressure is not less than the preset minimum pressure threshold, a reference brake valve opening is determined based on the engine speed, so as to adjust the opening of the brake valve to the reference brake valve opening; the reference brake valve opening is determined by the target curve.

2. The auxiliary braking method based on an air compressor according to claim 1, characterized in that, If the engine torque is greater than a preset torque threshold, the following is also included: Adjust the opening of the brake valve to its maximum opening.

3. The auxiliary braking method based on an air compressor according to claim 1, characterized in that, The air compressor auxiliary braking system also includes a safety valve arranged in parallel with the brake valve; During or after adjusting the opening of the brake valve to the target brake valve opening, the method further includes: Detect the air pressure of the air compressor; If the air pressure is greater than the preset air pressure value, the safety valve is opened; the preset air pressure value is less than the withstand pressure of the air compressor.

4. The auxiliary braking method based on an air compressor according to claim 1, characterized in that, The diameter α of the brake valve is not less than the diameter β of the air passages connected to both ends of the brake valve, and the bend angle of the air passages of the brake valve is greater than 90° when they are arranged.

5. An auxiliary braking device based on an air compressor, characterized in that, The operation employs the air compressor-based auxiliary braking method according to any one of claims 1 to 4, comprising: The engine speed detection module is used to detect engine torque and engine speed; The opening degree determination module is used to determine a target brake valve opening degree that is less than the maximum opening degree based on the engine speed if the engine torque is less than a preset torque threshold and the auxiliary brake switch is turned on. An opening adjustment module is used to adjust the opening of the brake valve to the target brake valve opening.

6. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program to enable the electronic device to implement the compressor-based auxiliary braking method as described in any one of claims 1 to 4.

7. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by an electronic device, cause the electronic device to implement the air compressor-based auxiliary braking method as described in any one of claims 1 to 4.

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