A method, apparatus, device and medium for controlling the speed of a road roller engine

Abstract

The application discloses a kind of compactor engine speed control method, device, equipment and medium, method includes: the current working condition of compactor engine is stable condition, obtain the current actual torque of engine;And according to current actual torque current actual power and current load rate are obtained;When current load rate is less than first load rate, calculate the first engine speed corresponding to engine under the condition that the displacement ratio of walking system is maximum at current set speed;Calculate the second engine speed corresponding to engine under the condition that the displacement ratio of vibration system is maximum at current set vibration frequency;And based on the engine equal power curve corresponding to current actual power, obtain the third engine speed corresponding to second load rate;Obtain the engine speed between current set engine speed and the maximum engine speed in three, and the engine fuel consumption value is lowest.In stable condition, the engine speed is on the basis of meeting current power demand, and fuel consumption is lowest, and efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of road roller technology, and in particular to a method, device, equipment and medium for controlling the speed of a road roller engine. Background Technology

[0002] Most road rollers currently equipped with closed-loop hydraulic systems operate based on pre-calibrated engine speeds. When the road roller's operating conditions are stable, the engine load rate is often low and inconsistent due to differences in the working environment, causing the engine's operating point to deviate from the economical fuel consumption zone, resulting in high fuel consumption.

[0003] Currently, when the road roller is operating stably and the load rate is low, the engine's set speed is usually reduced directly to the economic set speed. The problem with this is that directly reducing the engine's set speed to the economic set speed may not meet the actual needs of the road roller under the current operating conditions. Summary of the Invention

[0004] This invention provides a method, device, equipment, and medium for controlling the speed of a road roller engine, so as to achieve the goal of minimizing the engine speed and fuel consumption while meeting the actual needs of the road roller under its current working conditions.

[0005] To achieve the above objectives, a first aspect of the present invention provides a method for controlling the speed of a road roller engine, wherein the road roller includes a traveling system, a vibration system, and an engine, and the speed control method includes:

[0006] Determine whether the current operating condition of the roller's engine is a stable operating condition;

[0007] If so, then obtain the current actual torque of the engine; and obtain the current actual power and current load rate based on the current actual torque;

[0008] When the current load rate is less than the first load rate, calculate the first engine speed corresponding to the engine when the displacement ratio of the walking system is the largest at the current set vehicle speed; calculate the second engine speed corresponding to the engine when the displacement ratio of the vibration system is the largest at the current set vibration frequency; and obtain the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate;

[0009] Based on the engine fuel consumption curve and the engine power curve, as well as the maximum engine speed among the first engine speed, the second engine speed and the third engine speed, and the currently set engine speed, the engine speed with the lowest fuel consumption value between the currently set engine speed and the maximum engine speed is obtained as the final speed under stable engine conditions.

[0010] Optionally, determining whether the current operating condition of the road roller's engine is a stable operating condition includes:

[0011] When the difference between the current actual speed and the set speed of the road roller is within a first threshold range, the difference between the actual engine speed and the set engine speed is within a second threshold range, the difference between the actual speed and the set speed of the vibration motor is within a third threshold range, and the vibration start button or the large / small vibration switch button is pressed for a first duration, the current operating condition of the engine is determined to be a stable operating condition.

[0012] Optionally, obtaining the current actual torque of the engine includes:

[0013] When the current operating condition is determined to be a stable operating condition, timing begins, and during the second time period, multiple actual torques of the engine are collected, and the average value of the multiple actual torques of the engine is taken as the current actual torque.

[0014] Optionally, obtaining the current actual power and current load rate based on the current actual torque includes:

[0015] The current actual power is the product of the current actual torque and the set engine speed;

[0016] The current load rate is the ratio between the current actual torque and the maximum torque corresponding to the set engine speed.

[0017] Optionally, the method for controlling the speed of the road roller engine further includes:

[0018] If not, the set engine speed shall be taken as the final engine speed under the current operating conditions of the engine.

[0019] To achieve the above objectives, a second aspect of the present invention provides a speed control device for a road roller engine, the road roller comprising a traveling system, a vibration system, and an engine, including:

[0020] The judgment module is used to determine whether the current operating condition of the engine of the road roller is a stable operating condition;

[0021] The first calculation module is used to obtain the current actual torque of the engine if the condition is met; and to obtain the current actual power and current load rate based on the current actual torque.

[0022] The second calculation module is used to calculate the first engine speed corresponding to the engine when the displacement ratio of the walking system is the largest at the current set vehicle speed, when the current load rate is less than the first load rate; calculate the second engine speed corresponding to the engine when the displacement ratio of the vibration system is the largest at the current set vibration frequency; and obtain the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate.

[0023] The engine speed determination module is used to obtain the engine speed with the lowest engine fuel consumption value between the current set engine speed and the maximum engine speed, based on the engine fuel consumption curve and the engine power curve, as well as the maximum engine speed among the first engine speed, the second engine speed and the third engine speed, and the currently set engine speed, and use it as the final engine speed under stable operating conditions.

[0024] Optionally, the determination module is further used to,

[0025] When the difference between the current actual speed and the set speed of the road roller is within a first threshold range, the difference between the actual engine speed and the set engine speed is within a second threshold range, the difference between the actual speed and the set speed of the vibration motor is within a third threshold range, and the vibration start button or the large / small vibration switch button is pressed for a first duration, the current operating condition of the engine is determined to be a stable operating condition.

[0026] Optionally, the first calculation module is used to,

[0027] When the current operating condition is determined to be a stable operating condition, timing begins, and during the second time period, multiple actual torques of the engine are collected, and the average value of the multiple actual torques of the engine is taken as the current actual torque.

[0028] To achieve the above objectives, a third aspect of the present invention provides an electronic device, the electronic device comprising:

[0029] At least one processor; and

[0030] A memory communicatively connected to the at least one processor; wherein,

[0031] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the speed control method for a road roller engine according to any embodiment of the present invention.

[0032] To achieve the above objectives, a fourth aspect of the present invention provides a computer-readable storage medium storing computer instructions for causing a processor to execute and implement the speed control method for a road roller engine as described in any embodiment of the present invention.

[0033] According to embodiments of the present invention, a method, device, equipment, and medium for controlling the speed of a road roller engine are provided. The road roller includes a traveling system, a vibration system, and an engine. The control method includes: determining whether the current operating condition of the road roller engine is a stable operating condition; if so, obtaining the current actual torque of the engine; and obtaining the current actual power and current load rate based on the current actual torque; when the current load rate is less than a first load rate, calculating the first engine speed corresponding to the engine at the maximum displacement ratio of the traveling system under the current set vehicle speed; calculating the second engine speed corresponding to the engine at the maximum displacement ratio of the vibration system under the current set vibration frequency; and obtaining the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate; and obtaining the engine speed with the lowest engine fuel consumption value between the current set engine speed and the maximum engine speed based on the engine fuel consumption curve and the engine isopower curve, as well as the maximum engine speed among the first engine speed, the second engine speed, and the third engine speed, and the current set engine speed, as the final engine speed under stable operating conditions. Therefore, the above method can reduce the engine speed under stable operating conditions to the engine speed with the lowest fuel consumption value, while meeting the actual power requirements of the engine.

[0034] 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

[0035] 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.

[0036] Figure 1This is a flowchart of the speed control method for a road roller engine proposed in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of engine calibration curves in related technologies;

[0038] Figure 3 This is a block diagram of the speed control device for a road roller engine proposed in an embodiment of the present invention;

[0039] Figure 4 This is a structural diagram of an electronic device for implementing the speed control method for a road roller engine proposed in this embodiment of the invention. Detailed Implementation

[0040] 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.

[0041] 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 a 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.

[0042] Figure 1 This is a flowchart of the speed control method for a road roller engine proposed in an embodiment of the present invention.

[0043] The road roller includes a walking system, a vibration system, and an engine, such as... Figure 1 As shown, the speed control method for the road roller engine includes:

[0044] S101 determines whether the current operating condition of the road roller's engine is a stable operating condition.

[0045] To determine whether the current operating condition of the road roller's engine is stable, the following can be used: compare the current actual speed of the road roller, the actual engine speed, the actual speed of the vibration motor, and the time when the start button or the large / small vibration switch button is pressed with the set value under the current operating condition. If the difference between the above actual values ​​and the corresponding set values ​​is within the corresponding threshold range, then the current operating condition of the engine can be determined to be stable. Otherwise, the current operating condition of the engine has not yet entered a stable operating condition.

[0046] It is understood that the setpoints corresponding to the aforementioned actual values ​​are all driver-required values. In other words, each setpoint can be obtained through driver commands and the calibration curve of the driver commands and setpoints. The aforementioned actual values ​​can be obtained by collecting data from the corresponding sensors.

[0047] S102, if so, obtain the current actual torque of the engine; and obtain the current actual power and current load rate based on the current actual torque.

[0048] Optionally, obtaining the current actual power and current load rate based on the current actual torque includes:

[0049] The current actual power is the product of the current actual torque and the set engine speed;

[0050] The current load rate is the ratio between the current actual torque and the maximum torque corresponding to the set engine speed.

[0051] The current actual torque can be obtained through relevant sensors, and the current actual power can be the product of the current actual torque and the set engine speed. The current load rate can be the ratio between the current actual torque and the maximum torque corresponding to the set engine speed. The maximum torque corresponding to the set engine speed can be obtained from the engine speed and torque calibration curve.

[0052] S103, when the current load rate is less than the first load rate, calculate the first engine speed corresponding to the engine with the maximum displacement ratio of the traveling system at the current set vehicle speed; calculate the second engine speed corresponding to the engine with the maximum displacement ratio of the vibration system at the current set vibration frequency; and obtain the third engine speed corresponding to the second load rate based on the engine equal power curve corresponding to the current actual power, where the second load rate is greater than the first load rate.

[0053] It should be noted that when the engine's current operating condition is stable, and the current load rate is less than the first load rate, it indicates that the engine is in a low-load condition. The first load rate can be 60% or lower. In this case, the first engine speed corresponding to the engine with the maximum displacement ratio of the travel system at the current set vehicle speed can be calculated. The displacement ratio of the travel system is the ratio of the travel pump displacement to the travel motor displacement, which in turn is the ratio of the travel motor speed to the travel pump speed. The travel motor speed is related to the current set vehicle speed, and the travel pump speed is related to the first engine speed. Therefore, when the displacement ratio of the travel system is at its maximum, the calculated first engine speed at the current set vehicle speed is the minimum. That is, when the travel pump displacement is at its maximum and the travel motor displacement is at its minimum, and the travel pump speed is at its minimum for a given travel motor speed, the corresponding first engine speed is the minimum. The first engine speed obtained at this point is the minimum first engine speed that meets the requirements of the current set vehicle speed.

[0054] Similarly, calculate the second engine speed corresponding to the engine with the maximum displacement ratio of the vibration system at the current set vibration frequency. The displacement ratio of the vibration system is the ratio of the vibration pump displacement to the vibration motor displacement, which in turn is the ratio of the vibration motor speed to the vibration pump speed. The vibration motor speed is related to the current set vibration frequency, and the vibration pump speed is related to the second engine speed. Therefore, when the displacement ratio of the vibration system is at its maximum, the calculated second engine speed is at its minimum at the current set vibration frequency. That is, the vibration pump displacement is at its maximum, the vibration motor displacement is at its minimum, and with a fixed vibration motor speed, the vibration pump speed is at its minimum, corresponding to the minimum second engine speed. The second engine speed obtained at this point is the minimum second engine speed that meets the requirements of the current set vibration frequency.

[0055] Furthermore, based on the engine's isopower curve corresponding to the current actual power, a third engine speed corresponding to the second load rate is obtained, where the second load rate is greater than the first load rate. The second load rate can be 85% or higher. In other words, on the engine's isopower curve, an isopower curve corresponding to the current actual power can be found, and a third engine speed with a load rate of 85% (i.e., the ratio of the current actual torque to the maximum torque at the corresponding engine speed is 85%) can be found. This third engine speed is the minimum third engine speed that can satisfy the current actual power requirement.

[0056] For example, Figure 2 This is a schematic diagram of engine calibration curves in related technologies. For example... Figure 2 As shown, Figure 2 The horizontal axis represents engine speed, and the vertical axis represents torque. Figure 2 Contour line A represents the constant fuel consumption curve, dashed curve C represents the constant power curve, and boundary line B represents the maximum torque curve. If in... Figure 2Point D in the equation represents the current actual engine speed, n1, with a fuel consumption of 200g / kWh and a current actual power output between 80kW and 100kW, estimated at 88kW. Assuming a stable operating condition is reached at point D, we can continue along the 88kW isopower curve towards points where the engine speed decreases. For example, when we reach the x2% torque point, the load rate reaches 85%, and the corresponding engine speed is n2, which is the third engine speed. It should be noted that... Figure 2 This is merely an illustrative diagram and is not intended to limit the specific implementation of this invention.

[0057] S104, based on the engine fuel consumption curve and the engine power curve, as well as the maximum engine speed among the first engine speed, the second engine speed and the third engine speed, and the currently set engine speed, obtains the engine speed with the lowest engine fuel consumption value between the currently set engine speed and the maximum engine speed, and uses it as the final speed under stable engine operating conditions.

[0058] It should be noted that after obtaining the first, second, and third engine speeds in step S103, a maximum engine speed can be obtained. This maximum engine speed can simultaneously meet the requirements of the travel system, the vibration frequency requirement, and the current actual power requirement. Therefore, by combining the engine fuel consumption curve and the engine isopower curve, interpolation can be performed between this maximum engine speed and the currently set engine speed to find the engine speed with the lowest fuel consumption value, which is then used as the final speed under stable engine operating conditions.

[0059] Among them, continue to refer to Figure 2 By following the isopower curve F corresponding to the current actual power, the engine speed with the lowest engine fuel consumption can be found between the maximum engine speed obtained above and the currently set engine speed.

[0060] It is understandable that the efficiency expression of the hydraulic system of a road roller is: η = η v ·η m ;

[0061] Where, η v η is the volumetric efficiency of a hydraulic pump or motor. m For mechanical efficiency.

[0062]

[0063] in,

[0064] In the formula, P i For input power, P t P is the theoretical output power. o C represents the actual output power. sFor laminar leakage coefficient, C v For laminar flow drag coefficient, C f Δp is the mechanical resistance coefficient; n is the pump speed; μ is the dynamic viscosity of the oil; and D is the inlet and outlet pressure difference. pmax For maximum displacement, T c β represents the speed loss, and β represents the displacement ratio.

[0065] As shown in the above formula, the efficiency of the hydraulic system (engine system) is mainly related to the pump speed n, displacement ratio β, and pressure difference Δp. For mechanical efficiency η... m When the pump speed n decreases while the displacement ratio remains constant, or when the pump speed n decreases while the displacement ratio increases, the mechanical efficiency η m It will improve. Regarding volumetric efficiency η v When the pump speed n remains constant and the displacement ratio increases, the volumetric efficiency η v Yes, it will improve. Generally speaking, increasing the displacement ratio is beneficial to improving the efficiency of the engine system. According to the law of conservation of flow, pump displacement * pump speed equals motor displacement * motor speed, and the displacement ratio equals pump displacement / motor displacement. Therefore, the displacement ratio equals motor speed / pump speed. Thus, theoretically, reducing the pump speed while keeping the motor speed constant can improve the mechanical efficiency η. m Maintain volumetric efficiency η v constant.

[0066] Furthermore, while meeting the power matching requirements, the motor speed can be kept constant while the pump speed is reduced, allowing the pump to operate at a high displacement and achieve higher efficiency.

[0067] Because road rollers require significant engine power during start-up and vibration-initiated operation, the currently used engine speed setting meets these high power demands. When operating conditions stabilize, the engine load and required output power decrease. Since road rollers mostly operate at stable operating points, reducing engine speed and increasing the pump-motor displacement ratio, along with finding the optimal point on the isopower curve, can meet the power requirements for stable operation, while simultaneously reducing fuel consumption and improving engine system efficiency.

[0068] In the above example, the first engine speed can be understood as the travel pump speed obtained when the travel motor speed remains constant (i.e., the vehicle speed remains constant) and the travel system displacement ratio is at its maximum (pump displacement is at its maximum, motor displacement is at its minimum). The second engine speed can be understood as the vibration pump speed obtained when the vibration system motor speed remains constant (i.e., the vibration frequency remains constant) and the vibration system displacement ratio is at its maximum (pump displacement is at its maximum, motor displacement is at its minimum). Under these conditions, both the travel pump speed and the vibration pump speed are the minimum pump speeds that satisfy the condition of a constant current motor speed.

[0069] Therefore, the engine speed obtained through the above speed control method can meet the requirements of low fuel consumption, actual power demand, the needs of the travel system and vibration system, and improve the efficiency of the hydraulic system.

[0070] Optionally, determining whether the current operating condition of the road roller's engine is a stable operating condition includes:

[0071] When the difference between the current actual speed and the set speed of the road roller is within the first threshold range, the difference between the actual engine speed and the set engine speed is within the second threshold range, the difference between the actual speed and the set speed of the vibration motor is within the third threshold range, and the vibration start button or the large / small vibration switch button is pressed for a first duration, the current operating condition of the engine is determined to be a stable operating condition.

[0072] The current actual vehicle speed can be obtained from the wheel speed sensors, and the set speed is related to the gear selected by the driver. The actual engine speed can be obtained from the engine motor speed sensor, and the set engine speed is related to the gear selected by the driver. The actual vibration motor speed can be obtained from the vibration motor speed sensor, and the set motor speed is related to the gear selected by the driver. The duration for which the vibration start button or vibration mode switch button is pressed can be calculated using a timer. The first threshold range, the second threshold range, the second threshold range, and the first duration can be set according to practical experience or experiments. When all four conditions are met simultaneously, the current operating condition can be determined as a stable operating condition.

[0073] Optionally, obtaining the engine's current actual torque includes:

[0074] Once the current operating condition is determined to be a stable operating condition, timing begins, and during the second time period, multiple actual torques of the engine are collected, and the average value of the multiple actual torques of the engine is taken as the current actual torque.

[0075] Among them, multiple actual torques can be acquired by collecting data from force sensors, and the average value of multiple actual torques is used as the current actual torque, which helps to maintain the stability of the data and further helps to maintain the stability of the load rate calculated later.

[0076] Optionally, the method for controlling the speed of the road roller engine also includes:

[0077] If not, the set engine speed will be used as the final engine speed under the current operating conditions.

[0078] It should be noted that, since the operating requirements for road rollers are stable speed and vibration frequency, it is generally required that the engine speed be stable during operation. Therefore, once the optimal speed is determined under stable operating conditions, it is no longer updated, and the engine's set speed is adjusted towards the determined optimal speed. When operating conditions change, such as vibration switching or changes in required speed, the above process is repeated to obtain the latest optimal speed.

[0079] Figure 3 This is a block diagram of the speed control device for a road roller engine according to an embodiment of the present invention. Figure 3 As shown, the road roller includes a traveling system, a vibration system, and an engine. The speed control device includes:

[0080] The judgment module 101 is used to determine whether the current operating condition of the road roller's engine is a stable operating condition;

[0081] The first calculation module 102 is used to obtain the current actual torque of the engine if the condition is met; and to obtain the current actual power and current load rate based on the current actual torque.

[0082] The second calculation module 103 is used to calculate the first engine speed corresponding to the engine with the largest displacement ratio of the walking system at the current set vehicle speed when the current load rate is less than the first load rate; calculate the second engine speed corresponding to the engine with the largest displacement ratio of the vibration system at the current set vibration frequency; and obtain the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate.

[0083] The speed determination module 104 is used to obtain the engine speed with the lowest engine fuel consumption value between the current set engine speed and the maximum engine speed, based on the engine fuel consumption curve and the engine power curve, as well as the maximum engine speed among the first engine speed, the second engine speed and the third engine speed, and the current set engine speed, as the final speed under stable engine operating conditions.

[0084] Optionally, the judgment module 101 is also used to,

[0085] When the difference between the current actual speed and the set speed of the road roller is within the first threshold range, the difference between the actual engine speed and the set engine speed is within the second threshold range, the difference between the actual speed and the set speed of the vibration motor is within the third threshold range, and the vibration start button or the large / small vibration switch button is pressed for a first duration, the current operating condition of the engine is determined to be a stable operating condition.

[0086] Optionally, the first computing module 102 is used for,

[0087] Once the current operating condition is determined to be a stable operating condition, timing begins, and during the second time period, multiple actual torques of the engine are collected, and the average value of the multiple actual torques of the engine is taken as the current actual torque.

[0088] Optionally, in the first calculation module 102, the current actual power is the product of the current actual torque and the set engine speed; the current load rate is the ratio between the current actual torque and the maximum torque corresponding to the set engine speed.

[0089] Optionally, the determination module 101 is further configured to, if not, set the engine speed as the final engine speed under the current operating conditions of the engine.

[0090] The speed control device for the road roller engine provided in this embodiment of the invention can execute the speed control method for the road roller engine provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method. The working principle of the corresponding modules can be referred to the method embodiment, and will not be repeated here.

[0091] This control method offers several advantages: Without disrupting the power requirements of the road roller under transient conditions, it optimizes the steady-state operating conditions to determine the optimal operating speed, thereby reducing fuel consumption while meeting the roller's operational requirements. The determination of stable operating conditions and the calculation of required engine power under these conditions ensure that the collaborative function only intervenes under steady-state conditions, avoiding disruption to the engine's high power output under unsteady conditions. The acquisition of the optimal steady-state operating point includes constraints such as the engine speed range and equal power constraints, and searches for the best operating point within these constraints to satisfy the engine's current state. Furthermore, with the engine, travel system, and vibration system all operating under the same domain controller, the engine and hydraulic system are controlled collaboratively. This improves the efficiency of the hydraulic system and brings the engine's operating point closer to the economical fuel consumption range.

[0092] This invention provides an electronic device, which includes:

[0093] At least one processor; and

[0094] A memory that is communicatively connected to at least one processor; wherein,

[0095] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to perform the speed control method for a road roller engine according to any embodiment of the present invention.

[0096] This invention provides a computer-readable storage medium storing computer instructions that, when executed by a processor, implement the speed control method for a road roller engine according to any embodiment of this invention.

[0097] Figure 4 A schematic diagram of an electronic device that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0098] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0099] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0100] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the speed control method for a road roller engine.

[0101] In some embodiments, the speed control method for a road roller engine can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the speed control method for a road roller engine described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the speed control method for a road roller engine by any other suitable means (e.g., by means of firmware).

[0102] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0103] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0104] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0105] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0106] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0107] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0108] In summary, the method, apparatus, equipment, and medium for controlling the engine speed of a road roller according to embodiments of the present invention, wherein the road roller includes a traveling system, a vibration system, and an engine, and the control method includes: determining whether the current operating condition of the road roller's engine is a stable operating condition; if so, obtaining the current actual torque of the engine; and obtaining the current actual power and current load rate based on the current actual torque; when the current load rate is less than a first load rate, calculating the first engine speed corresponding to the engine at the maximum displacement ratio of the traveling system under the current set vehicle speed; calculating the second engine speed corresponding to the engine at the maximum displacement ratio of the vibration system under the current set vibration frequency; and obtaining the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate; and obtaining the engine speed with the lowest engine fuel consumption value between the current set engine speed and the maximum engine speed based on the engine fuel consumption curve and the engine isopower curve, as well as the maximum engine speed among the first engine speed, the second engine speed, and the third engine speed, and the current set engine speed, as the final engine speed under stable operating conditions. Therefore, the above method can reduce the engine speed under stable operating conditions to the engine speed with the lowest fuel consumption value, while meeting the actual power requirements of the engine.

[0109] 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.

[0110] 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 controlling the speed of a road roller engine, characterized in that, The road roller includes a traveling system, a vibration system, and an engine; the speed control method includes: Determine whether the current operating condition of the roller's engine is a stable operating condition; If so, then obtain the current actual torque of the engine; and obtain the current actual power and current load rate based on the current actual torque; When the current load rate is less than the first load rate, calculate the first engine speed corresponding to the engine when the displacement ratio of the travel system is at its maximum at the current set vehicle speed; calculate the second engine speed corresponding to the engine when the displacement ratio of the vibration system is at its maximum at the current set vibration frequency; and obtain the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate; wherein, the displacement ratio of the travel system is the ratio of the travel pump displacement to the travel motor displacement; and the displacement ratio of the vibration system is the ratio of the vibration pump displacement to the vibration motor displacement. Based on the engine fuel consumption curve and the engine power curve, as well as the maximum engine speed among the first engine speed, the second engine speed and the third engine speed, and the currently set engine speed, the engine speed with the lowest fuel consumption value between the currently set engine speed and the maximum engine speed is obtained as the final speed under stable engine conditions.

2. The method for controlling the speed of a road roller engine according to claim 1, characterized in that, The determination of whether the current operating condition of the road roller's engine is a stable operating condition includes: When the difference between the current actual speed and the set speed of the road roller is within a first threshold range, the difference between the actual engine speed and the set engine speed is within a second threshold range, the difference between the actual speed and the set speed of the vibration motor is within a third threshold range, and the vibration start button or the large / small vibration switch button is pressed for a first duration, the current operating condition of the engine is determined to be a stable operating condition.

3. The method for controlling the speed of a road roller engine according to claim 1, characterized in that, Obtaining the current actual torque of the engine includes: When the current operating condition is determined to be a stable operating condition, timing begins, and during the second time period, multiple actual torques of the engine are collected, and the average value of the multiple actual torques of the engine is taken as the current actual torque.

4. The method for controlling the speed of a road roller engine according to claim 1, characterized in that, The step of obtaining the current actual power and current load rate based on the current actual torque includes: The current actual power is the product of the current actual torque and the set engine speed; The current load rate is the ratio between the current actual torque and the maximum torque corresponding to the set engine speed.

5. The method for controlling the speed of a road roller engine according to claim 1, characterized in that, Also includes: If not, the set engine speed shall be taken as the final engine speed under the current operating conditions of the engine.

6. A speed control device for a road roller engine, characterized in that, The road roller includes a walking system, a vibration system, and an engine, including: The judgment module is used to determine whether the current operating condition of the engine of the road roller is a stable operating condition; The first calculation module is used to obtain the current actual torque of the engine if the condition is met; and to obtain the current actual power and current load rate based on the current actual torque. The second calculation module is used to calculate, when the current load rate is less than the first load rate, the first engine speed corresponding to the engine at the current set vehicle speed when the displacement ratio of the travel system is the largest; calculate the second engine speed corresponding to the engine at the current set vibration frequency when the displacement ratio of the vibration system is the largest; and obtain the third engine speed corresponding to the second load rate based on the engine isopower curve corresponding to the current actual power, wherein the second load rate is greater than the first load rate; wherein the displacement ratio of the travel system is the ratio of the travel pump displacement to the travel motor displacement; and the displacement ratio of the vibration system is the ratio of the vibration pump displacement to the vibration motor displacement; The engine speed determination module is used to obtain the engine speed with the lowest engine fuel consumption value between the current set engine speed and the maximum engine speed, based on the engine fuel consumption curve and the engine power curve, as well as the maximum engine speed among the first engine speed, the second engine speed and the third engine speed, and the currently set engine speed, and use it as the final engine speed under stable operating conditions.

7. The speed control device for a road roller engine according to claim 6, characterized in that, The judgment module is also used for, When the difference between the current actual speed and the set speed of the road roller is within a first threshold range, the difference between the actual engine speed and the set engine speed is within a second threshold range, the difference between the actual speed and the set speed of the vibration motor is within a third threshold range, and the vibration start button or the large / small vibration switch button is pressed for a first duration, the current operating condition of the engine is determined to be a stable operating condition.

8. The speed control device for a road roller engine according to claim 6, characterized in that, The first calculation module is used for, When the current operating condition is determined to be a stable operating condition, timing begins, and during the second time period, multiple actual torques of the engine are collected, and the average value of the multiple actual torques of the engine is taken as the current actual torque.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the speed control method for the road roller engine according to any one of claims 1-5.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the speed control method for the road roller engine according to any one of claims 1-5.

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