Power mode selection system and method for engine in pavement cold regenerator

Abstract

The invention belongs to the technical field of engineering machinery, and particularly relates to a power mode selection system and method for an engine in a pavement cold regenerator. The working module is used for calculating the working earth volume psi of each liter of fuel according to the working speed v, the working depth h and the fuel consumption Q signal corresponding to each power mode and the working time t collected by a timer arranged in the vehicle control unit, and the power mode with the large working earth volume psi of each liter of fuel serves as the current working mode; according to the method, the vehicle control unit is used for controlling the pavement cold regeneration machine to run for the preset duration in the medium-load power mode and the heavy-load power mode respectively, the working speed, the working depth, the fuel consumption and the working time in each power mode are comprehensively calculated, and the fuel economy index, namely the working earth volume per liter of fuel, is obtained. The index comprehensively considers a plurality of key factors influencing the efficiency of the equipment, and can accurately reflect the energy utilization efficiency in different power modes.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a power mode selection system and method for an engine in a road surface cold regenerator. BACKGROUND

[0002] In road maintenance and repair engineering, the road surface cold regenerator plays an important role as a key equipment. It can perform on-site cold regeneration processing on old road materials and reprocess them into required base or subbase materials, which not only effectively utilizes old materials and reduces resource waste, but also reduces construction cost and environmental impact.

[0003] In the working process of the traditional road surface cold regenerator, the engine usually runs in a fixed power mode. However, in actual working scenarios, the road surface conditions are complex and diverse, and the road surface hardness, thickness, and damage degree of different road sections differ significantly. For example, when processing a relatively thin and low-hardness road surface, if the engine still runs in a high-power mode, it will cause excessive energy consumption and increase operating costs; while when processing a relatively thick and high-hardness road surface, a low-power mode cannot meet the construction requirements, resulting in low working efficiency and even affecting the construction quality.

[0004] Although some existing road surface cold regenerators have multiple power modes, they lack a scientific and reasonable power mode selection mechanism. Operators often choose power modes based on experience, and this subjective judgment method cannot accurately match actual working requirements. On the one hand, inexperienced operators may choose inappropriate power modes, making the equipment unable to run in the best state; on the other hand, even experienced operators also cannot accurately adjust the power mode in real time under complex working conditions to achieve efficient energy utilization and maximize working efficiency.

[0005] In addition, current assessments of the working state of the road surface cold regenerator mostly only focus on a single working parameter, such as working speed or working depth, ignoring the comprehensive influence of various parameters and the correlation with fuel economy. In fact, multiple factors such as working speed, working depth, and fuel consumption are mutually restrictive and influence each other, and together determine the working efficiency and fuel economy of the equipment. Therefore, a system that can comprehensively consider multiple factors and scientifically select the engine power mode is needed to improve the overall performance and economic benefits of the road surface cold regenerator and meet the needs of modern road maintenance engineering. SUMMARY

[0006] In view of the above deficiencies of the prior art, the present application provides a power mode selection system and method for an engine in a road surface cold regenerator to solve the above technical problems.

[0007] In a first aspect, the present invention provides a power mode selection system for an engine in a pavement cold regeneration machine, comprising: The travel motor speed sensor is installed on the travel motor of the pavement cold regeneration machine to collect the travel motor speed data; The milling drum cylinder displacement sensor is installed in the milling drum cylinder of the road cold regeneration machine to collect the piston displacement data in the milling drum cylinder; Fuel signal acquisition module, used to collect fuel consumption △Q signal; The vehicle controller is electrically connected to the travel motor speed sensor, the milling drum cylinder displacement sensor and the fuel signal acquisition module, and is used to control the pavement cold regeneration machine to operate for a first preset time period in the preset engine medium-load power mode and heavy-load power mode, respectively, and calculate the corresponding working speed v of the pavement cold regeneration machine based on the travel motor speed data collected under each power mode; is used to calculate the corresponding working depth h of the pavement cold regeneration machine based on the piston displacement data in the milling drum cylinder collected under each power mode; is used to calculate the working earthwork volume ψ per liter of fuel based on the working speed v, working depth h, fuel consumption △Q signal corresponding to each power mode and the working time t collected by the timer built into the vehicle controller, and uses the working earthwork volume ψ per liter of fuel as the fuel economy index; is used to compare the fuel economy indexes under different power modes, and select the power mode with the largest fuel economy index value as the current working mode; Display, used to display fuel economy indicators and current working mode; The power actuator is electrically connected to the vehicle controller and is used to control the operation of the pavement cold regeneration machine according to the current working mode.

[0008] A further improvement of this technical solution is that the vehicle controller is further configured as follows: Before controlling the pavement cold regeneration machine to switch to the preset engine medium-load power mode and heavy-load power mode, first controlling the pavement cold regeneration machine to operate in the preset engine no-load power mode for a second preset time period to obtain a basic fuel consumption of the pavement cold regeneration machine in the no-load power mode; Furthermore, before calculating the working speed v and working depth h, the obtained working status data of the pavement cold regeneration machine under each power mode is analyzed for abnormalities, and when the working status data is abnormal, an alarm signal is issued and the operator is prompted through the display; at the same time, the pavement cold regeneration machine is automatically switched back to the previous power mode or the no-load power mode; And, according to the collected working speed v, working depth h and the preset regeneration working width W of the road cold regeneration machine, the formula Real-time calculation of earthwork workload V under each power mode; According to the preset calculation cycle, the earthwork volume ψ per liter of fuel in each calculation cycle is calculated using the formula ψ=V / △Q, and the average value of the earthwork volume ψ per liter of fuel in N consecutive calculation cycles is used as the fuel economy indicator.

[0009] A further improvement of this technical solution is that the display is further configured as follows: A real-time bar graph compares the earthwork volume per liter of fuel in medium-load and heavy-load power modes. When receiving the mode switching signal from the vehicle controller, the operator is reminded through flashing prompts and voice broadcasts; It stores mode switching records and corresponding fuel economy index data, and supports data export function.

[0010] A further improvement of the technical solution is that it also includes a display switch, which is connected to the display and is used to trigger the vehicle controller connected to the display to cumulatively calculate the working area A, working earthwork volume V, and fuel consumption of the road cold regeneration machine from the moment the display switch is closed when the display switch is closed. and output the corresponding accumulated value to the display for display.

[0011] A further improvement of this technical solution is that the power actuator includes: Engine power regulation module, used to adjust the output power of the engine; The power actuator synchronously adjusts the engine power parameters of the pavement cold regeneration machine according to the instructions sent by the vehicle controller to achieve mode switching.

[0012] Further improvements of this technical solution include that the fuel signal acquisition module includes an engine fuel inlet flow sensor and an engine oil return port flow sensor. The engine fuel inlet flow sensor is used to measure the fuel flow Q at the engine fuel inlet. 进 The engine oil return port flow sensor is used to measure the fuel flow Q at the engine oil return port. 回 , the vehicle controller is based on Q 进 and Q 回 Calculate the fuel consumption △Q signal, the calculation formula is: .

[0013] In a second aspect, the present invention provides a method for selecting a power mode of an engine in a pavement cold regeneration machine, comprising: Step S1, collecting the speed data of the travel motor through a travel motor speed sensor installed at the travel motor of the pavement cold regeneration machine; Step S2: collecting piston displacement data in the milling drum cylinder through a milling drum cylinder displacement sensor installed in the milling drum cylinder of the pavement cold regeneration machine; Step S3: collecting the fuel consumption ΔQ signal through the fuel signal acquisition module; Step S4: The vehicle controller controls the pavement cold regeneration machine to operate in a preset engine medium-load power mode and a preset engine heavy-load power mode for a first preset time period respectively; Step S5: The vehicle controller calculates the corresponding working speed v of the pavement cold regeneration machine based on the travel motor speed data collected in each power mode; Step S6: The vehicle controller calculates the working depth h corresponding to the road surface cold regeneration machine based on the piston displacement data in the milling drum cylinder collected under each power mode; Step S7: The vehicle controller calculates the earthwork volume ψ per liter of fuel based on the working speed v, working depth h, fuel consumption ΔQ signal corresponding to each power mode, and the working time t collected by the timer built into the vehicle controller, and uses the earthwork volume ψ per liter of fuel as the fuel economy indicator; Step S8: The vehicle controller compares the fuel economy indicators under different power modes and selects the power mode with the larger fuel economy indicator value as the current operating mode; Step S9: Displaying the fuel economy index and the current working mode on the display; Step S10: The power actuator controls the operation of the pavement cold regeneration machine according to the current working mode.

[0014] A further improvement of this technical solution is that, before step S4, it further includes: Step S0: The vehicle controller controls the pavement cold regeneration machine to operate in a preset engine no-load power mode for a second preset time period to obtain the basic fuel consumption of the pavement cold regeneration machine in the no-load power mode.

[0015] A further improvement of this technical solution is that step S7 includes: Step S71: According to the collected working speed v, working depth h and the preset regeneration working width W of the road surface cold regeneration machine, the formula Real-time calculation of earthwork workload V under each power mode; Step S72: Calculate the earthwork volume ψ per liter of fuel in each calculation cycle according to the preset calculation cycle using the formula ψ=V / △Q, and use the average value of the earthwork volume ψ per liter of fuel in N consecutive calculation cycles as the fuel economy indicator.

[0016] Further improvements to this technical solution also include: After the power mode of the engine in the pavement cold regeneration machine is set, the vehicle controller also obtains the oil level signal according to the fuel sensor set in the oil tank of the pavement cold regeneration machine, and calculates the remaining fuel capacity Q of the tank according to the oil level signal, and calculates the cruising working area S of the pavement cold regeneration machine according to the remaining fuel capacity Q, and outputs the calculated remaining fuel capacity Q and cruising working area S to the display for display.

[0017] The beneficial effects of the present invention are: The engine power mode of traditional pavement cold regeneration machines is fixed or depends on manual experience selection, which makes it difficult to adapt to complex and changeable working conditions. The present invention controls the pavement cold regeneration machine to run for preset periods of time in medium-load and heavy-load power modes respectively through the vehicle controller, and comprehensively calculates the working speed, working depth, fuel consumption and working time in each power mode to obtain the fuel economy indicator of earthwork per liter of fuel. This indicator comprehensively considers multiple key factors that affect the performance of the equipment and can accurately reflect the energy utilization efficiency under different power modes. Based on this indicator, the power mode with a large fuel economy index value is selected as the current working mode, so that the equipment can operate at the most appropriate power under different working conditions, avoiding excessive energy consumption or insufficient power, significantly improving energy utilization efficiency, and reducing operating costs.

[0018] The vehicle controller in this invention calculates the earthwork workload in real time for each power mode based on collected data such as operating speed, operating depth, and preset regeneration width. It then calculates the earthwork workload per liter of fuel used during each cycle according to a preset calculation cycle, and uses the average value of N consecutive calculation cycles as the fuel economy indicator. This scientific calculation method accurately reflects the actual operating efficiency and fuel economy of the equipment in different power modes, providing operators and equipment managers with an intuitive and accurate decision-making basis, allowing them to adjust the power mode in a timely manner based on fuel economy indicators.

[0019] The display presents a real-time bar graph comparing the earthwork moved per liter of fuel in medium- and heavy-load power modes, allowing operators to intuitively compare the fuel economy of different power modes. When a mode switch signal is received, a flashing indicator and voice notification alert the operator, further enhancing operational convenience and safety. The display also stores mode switch records and corresponding fuel economy data, and supports data export, facilitating equipment management personnel's analysis and management of equipment operating data, providing strong support for equipment optimization and improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic block diagram of a system according to an embodiment of the present invention.

[0022] Figure 2 A schematic flow chart of a method according to an embodiment of the present invention.

[0023] Figure 3 It is a structural diagram of the trapezoidal fuel tank.

[0024] 110 is the travel motor speed sensor, 120 is the milling drum cylinder displacement sensor, 130 is the fuel signal acquisition module, 140 is the vehicle controller, 150 is the display, 160 is the mode switch, 210 is the fuel tank, 220 is the fuel sensor, 221 is the float, and 222 is the wiring harness. DETAILED DESCRIPTION

[0025] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] like Figure 1 As shown, the present invention provides a power mode selection system for an engine in a pavement cold regeneration machine, comprising: The travel motor speed sensor is installed on the travel motor of the pavement cold regeneration machine to collect the travel motor speed data; The milling drum cylinder displacement sensor is installed in the milling drum cylinder of the road cold regeneration machine to collect the piston displacement data in the milling drum cylinder; Fuel signal acquisition module, used to collect fuel consumption △Q signal; The vehicle controller is electrically connected to the travel motor speed sensor, the milling drum cylinder displacement sensor and the fuel signal acquisition module, and is used to control the pavement cold regeneration machine to operate for a first preset time period in the preset engine medium-load power mode and heavy-load power mode, respectively, and calculate the corresponding working speed v of the pavement cold regeneration machine based on the travel motor speed data collected under each power mode; is used to calculate the corresponding working depth h of the pavement cold regeneration machine based on the piston displacement data in the milling drum cylinder collected under each power mode; is used to calculate the working earthwork volume ψ per liter of fuel based on the working speed v, working depth h, fuel consumption △Q signal corresponding to each power mode and the working time t collected by the timer built into the vehicle controller, and uses the working earthwork volume ψ per liter of fuel as the fuel economy index; is used to compare the fuel economy indexes under different power modes, and select the power mode with the largest fuel economy index value as the current working mode; Display, used to display fuel economy indicators and current working mode; The power actuator is electrically connected to the vehicle controller and is used to control the operation of the pavement cold regeneration machine according to the current working mode.

[0028] Specifically, the travel motor speed sensor uses a magnetoelectric speed sensor with a measurement range of 0-3000 rpm, capable of accurately collecting speed data from the cold pavement regeneration machine's travel motor. This sensor exhibits excellent anti-interference capabilities and environmental adaptability, ensuring stable operation under the complex operating conditions of the cold pavement regeneration machine. It is installed at the non-drive end of the travel motor and secured to the motor housing with fasteners, ensuring coaxiality between the travel motor speed sensor and the motor shaft for accurate speed signal measurement. The output of the travel motor speed sensor is connected to the vehicle controller via the CAN bus to ensure reliable signal transmission.

[0029] The milling drum cylinder displacement sensor uses an internal cable-type displacement sensor installed within the milling drum cylinder. The cable is connected to the cylinder piston. As the piston moves, the cable expands and contracts, accurately measuring piston displacement. The sensor is installed through a pre-determined mounting hole in the cylinder and is properly sealed to prevent hydraulic oil leakage. After installation, the sensor undergoes zero-point and span calibration to ensure measurement accuracy. The sensor's signal output is also connected to the vehicle controller via the CAN bus, enabling real-time data transmission.

[0030] The fuel signal acquisition module includes an engine fuel inlet flow sensor and an engine oil return port flow sensor. The engine fuel inlet flow sensor is used to measure the fuel flow Q at the engine fuel inlet. 进 The engine oil return port flow sensor is used to measure the fuel flow Q at the engine oil return port. 回, the vehicle controller is based on Q 进 and Q 回 Calculate the fuel consumption △Q signal, the calculation formula is: .

[0031] Depending on the engine model, the vehicle controller can be connected to the engine controller via the CAN bus. The engine controller (i.e., the fuel signal acquisition module) collects the fuel consumption △Q in real time and transmits the data to the vehicle controller via the CAN bus. Alternatively, a turbine flow sensor can be installed at the engine oil inlet and an electromagnetic flow sensor can be installed at the oil return port (the fuel signal acquisition module includes a turbine flow sensor and an electromagnetic flow sensor). These two sensors collect the fuel inlet flow Q respectively. 进 and return oil flow Q 回 The signal is transmitted to the vehicle controller, which uses the formula △Q =Q 进 -Q 回 Calculate fuel consumption. When installing the flow sensor, ensure that its installation position meets the requirements of fluid mechanics to avoid turbulence in the pipeline that affects the measurement accuracy.

[0032] The vehicle controller utilizes a high-performance, industrial-grade embedded controller with multiple input and output interfaces, high-speed data processing capabilities, and powerful communication functions. The controller integrates a 32-bit microprocessor with a main frequency of up to 200MHz, enabling fast and accurate processing of sensor signals and performing complex calculations and logical judgments. It also includes 2MB of Flash memory and 512KB of SRAM (Static Random-Access Memory) for storing program code, operating data, and historical records. The vehicle controller communicates with the travel motor speed sensor, milling drum cylinder displacement sensor, and fuel signaling device via the CAN bus. It also controls the power actuators via PWM signals, achieving precise control of the cold pavement recycler. The controller is also equipped with Ethernet and USB ports for convenient system upgrades and data export. Upon system startup, the vehicle controller performs a self-test of each sensor, checking its connection status and proper operation. If any anomalies are detected, a fault alarm is issued on the display.

[0033] Wherein, the display is further configured as follows: A real-time bar graph compares the earthwork volume per liter of fuel in medium-load and heavy-load power modes. When receiving the mode switching signal from the vehicle controller, the operator is reminded through flashing prompts and voice broadcasts; It stores mode switching records and corresponding fuel economy index data, and supports data export function.

[0034] The display features an industrial-grade touchscreen display with high resolution (1920×1080), high brightness (500cd / m²), and a high contrast ratio (1000:1), enabling clear display even in bright outdoor sunlight. It is mounted in the cab, conveniently located for the driver. Connected to the vehicle controller via the CAN bus, the display receives fuel economy indicators and current operating mode information from the controller. The user-friendly interface displays key parameters such as fuel economy, current operating mode, operating speed, operating depth, and fuel consumption in intuitive graphics, charts, and / or text, making the information easy for the driver to read. The touchscreen allows the operator to conveniently view historical data, set parameters, and switch modes (operators operate the simulated mode switch on the touchscreen display). Mode switching can also be automatically controlled by the vehicle controller or manually initiated by the operator using a mode switch connected to the vehicle controller.

[0035] The power actuator consists of an engine power regulation module and a hydraulic system control module. The engine power regulation module adjusts engine output power by controlling the engine's throttle position using a PWM signal. The hydraulic system control module controls the hydraulic pressure of the milling drum and travel system by adjusting the hydraulic pump's displacement and pressure. The power actuator is connected to the vehicle controller via a control line (such as a CAN bus). It receives mode switching commands from the vehicle controller and synchronously adjusts the engine power and hydraulic system parameters of the road cold recycler, achieving rapid power mode switching and stable operation.

[0036] Furthermore, in order to calculate the workload and fuel consumption of the road surface cold regeneration machine in a certain period of time, a display switch connected to the display is also provided next to the display; for example, if a road surface cold regeneration machine is rented out, in order to facilitate the rent settlement, after the rental is completed, the display switch can be pressed (i.e., the display switch is closed), triggering the vehicle controller to cumulatively calculate the working area A, working earthwork volume V, and fuel consumption of the road surface cold regeneration machine from the moment the display switch is turned on. , and outputs it to the display, which shows the corresponding accumulated value at the current moment. When the display switch is disconnected, the accumulation ends, and the display shows the accumulated working area, accumulated earthwork volume, and fuel consumption of the road cold recycler at the time of accumulation. Pressing the display switch again restarts the next stage of accumulation, and the display simultaneously shows the accumulated value of the next stage.

[0037] In addition, the vehicle controller is further configured as follows: Before controlling the pavement cold regeneration machine to switch to the preset engine medium-load power mode and heavy-load power mode, the pavement cold regeneration machine is first controlled to run in the preset engine no-load power mode for a second preset time to obtain the basic fuel consumption of the pavement cold regeneration machine in the no-load power mode.

[0038] In no-load power mode, the engine idles (approximately 800-1000 rpm), the milling drum stops, and the travel motor is locked, maintaining only basic operation of the onboard hydraulic and electronic control systems. The vehicle controller sends a no-load mode command to the engine via the CAN bus, shutting down the milling drum drive pump and travel motor solenoid valves to ensure the equipment is operating without any actual load.

[0039] The vehicle controller has a built-in adjustable time parameter module, which sets the second preset time to 15 minutes by default (second preset time T2 = 15min). This time is determined by the following logic: The first 5 minutes is the engine warm-up phase, waiting for the water temperature to rise to above 60°C; The last 10 minutes are the stable operation stage to ensure that the fuel consumption data tends to be stable.

[0040] The operator can adjust the duration within the range of 10-20 minutes through the parameter setting interface of the display (it can be extended to 20 minutes in low temperature environments).

[0041] When the operator selects the "Power Mode Optimization" function on the display, the vehicle controller performs the following steps: First, control the equipment to complete safety self-tests (such as brake system and hydraulic oil level tests); If the self-test passes, a no-load mode start command is sent to the engine, and the operating permissions of the milling drum and travel motor are locked at the same time; Collect fuel consumption data in real time and obtain fuel consumption △Q signal; The vehicle controller performs median filtering on the collected no-load fuel consumption data (eliminating outliers beyond three times the standard deviation) and calculates the average fuel consumption within 10 minutes: ; Where n is the number of valid data points (n ≥ 600, corresponding to 10 minutes); is the no-load fuel consumption data collected for the i-th time.

[0042] In addition, the vehicle controller is further configured as follows: Before calculating the working speed v and working depth h, the working status data of the pavement cold regeneration machine under each power mode obtained are analyzed for abnormalities, and when there are abnormalities in the working status data, an alarm signal is issued and the operator is prompted through the display; at the same time, the pavement cold regeneration machine is automatically switched back to the previous power mode or no-load power mode.

[0043] The vehicle controller receives data from each sensor and stores it in internal memory. It also performs preliminary processing on the collected data, including data format conversion and filtering, to ensure its accuracy and reliability. Abnormal thresholds for each operating status data are pre-set in the vehicle controller based on the normal operating parameter range of the cold pavement recycler.

[0044] Before calculating operating speed v and operating depth h, the vehicle controller monitors and compares the collected operating status data for each power mode in real time. The collected data is compared with preset abnormality thresholds to determine whether the data is within the normal range. If a piece of operating status data exceeds the preset abnormality threshold multiple times (for example, three times) in a row, the vehicle controller determines that the data is abnormal.

[0045] Once the vehicle controller determines that there is an anomaly in the operating status data, it immediately issues an alarm signal. This alarm signal can be an audible or visual alarm, such as a continuous alarm sound from a buzzer installed in the cab, while a red warning light illuminates to attract the operator's attention. The vehicle controller transmits the abnormality information to the display via the CAN bus, which then alerts the operator in a prominent manner on the screen. For example, a red warning window may pop up, displaying specific abnormality information such as "abnormal travel motor speed," "abnormal milling drum cylinder displacement," or "abnormal fuel consumption." The window also displays the real-time value and normal range of the abnormal data in detail, allowing the operator to quickly understand the abnormal situation.

[0046] While issuing an alarm signal and prompting the operator, the vehicle controller determines whether to automatically switch power modes based on preset logic. If the abnormality is severe and may affect the normal operation of the equipment or cause damage to the equipment, the vehicle controller automatically switches the road cold regeneration machine back to the previous power mode or no-load power mode. For example, if the travel motor speed is detected to be abnormally high in medium-load power mode and the duration exceeds the set safety threshold (for example, 10 seconds), the vehicle controller determines that there is a risk of the equipment operating in the current power mode and automatically switches the equipment back to no-load power mode. The vehicle controller sends a mode switching command to the power actuator via the CAN bus. Upon receiving the command, the power actuator responds quickly and executes the switching operation.

[0047] Furthermore, the vehicle controller is also configured as follows: According to the collected working speed v, working depth h and the preset regeneration working width W of the road cold recycler, the formula Real-time calculation of earthwork workload V under each power mode; According to the preset calculation cycle, the earthwork volume ψ per liter of fuel in each calculation cycle is calculated using the formula ψ=V / △Q, and the average value of the earthwork volume ψ per liter of fuel in N consecutive calculation cycles is used as the fuel economy indicator.

[0048] The present invention not only considers the fuel consumption, but also takes into account the key working parameters such as working speed v, working depth h and regeneration working width W. The earthwork volume V is calculated in real time for each power mode, and then the earthwork volume ψ (per liter of fuel consumed) is calculated using the formula ψ = V / △Q. This allows for a comprehensive and accurate assessment of fuel economy under different power modes. This comprehensive assessment avoids the one-sidedness of single-parameter evaluation and more accurately reflects the fuel efficiency of the equipment in actual operation.

[0049] When the no-load mode ends, the vehicle controller switches to the medium-load power mode (engine speed 1800rpm) and runs for 15 minutes. When calculating the actual working fuel consumption in this mode, the no-load basic fuel consumption is automatically deducted: ; in, The fuel consumption after correction in medium load mode; This represents the actual fuel consumption measured in medium-load mode. When calculating actual operating fuel consumption in medium-load power mode, the no-load base fuel consumption is automatically deducted to obtain the corrected fuel consumption. This correction eliminates the impact of no-load operation on fuel consumption calculations, making the calculated fuel economy more accurate and reliable, and better reflecting the fuel economy of the equipment under actual load conditions.

[0050] If the collection cycle is 1 second, then i=1 corresponds to the fuel consumption data of the first second of no-load operation, i=2 corresponds to the second, and so on until i=n corresponds to the data of the nth second (n is the total number of collections); the vehicle controller collects data at a 1-second cycle during the stable operation phase of no-load mode (e.g. 10 minutes), at which time n=600 (10 minutes = 600 seconds). i ranges from 1 to 600, corresponding to the instantaneous fuel consumption values ​​from the 1st second to the 600th second, respectively. to , obtained by accumulating and averaging , in order to eliminate the impact of instantaneous fluctuations on the results.

[0051] Earthwork workload in medium load mode For example, the corrected earthwork volume per liter of fuel in a single cycle is: The same principle applies to fuel consumption calculations in heavy-load power mode (engine speed 2200 rpm), ensuring that fuel economy indicators in different power modes are comparable.

[0052] Afterwards, if the earthwork volume per liter of fuel in three consecutive cycles is: Cycle 1: 47.3 m³ / L; Cycle 2: 48.1m³ / L; Cycle 3: 46.9m³ / L; Then the average value of earthwork volume per liter of fuel over three consecutive calculation cycles is: ; When the system is calculated in medium load mode 47.43m³ / L, calculated under heavy load mode When the fuel consumption reaches 42.85 m³ / L, the vehicle controller automatically selects medium-load mode, which offers higher fuel efficiency. This automatic selection mechanism eliminates the subjectivity and inaccuracy of manual mode selection, ensuring the equipment always operates in the most economical power mode, effectively reducing operating costs and improving the equipment's economic benefits.

[0053] The vehicle controller opens a circular data buffer to store the ψ values ​​of the last 20 calculation cycles. Each buffer unit contains: Calculate the start timestamp of the cycle; The value of ψ during this period; Corresponding power mode (medium load / heavy load); Fuel economy indicators.

[0054] Each time a new calculation cycle is completed, the buffer data is updated in chronological order, the old data is removed and the new data is added. For example, after the ψ value of 47.7m³ / L in the 4th cycle is added, the buffer stores the data of the 2nd to 4th cycles, and the new average value is: .

[0055] The system continuously calculates the earthwork volume per liter of fuel (ψ) over a preset calculation cycle and uses the average value over N consecutive calculation cycles as the fuel economy indicator. This dynamic calculation and evaluation method promptly reflects changes in the equipment's fuel economy under different operating conditions, enabling the equipment to quickly adapt to changing operating conditions and maintain optimal operating conditions.

[0056] like Figure 2 As shown, the present invention provides a method for selecting a power mode of an engine in a pavement cold regeneration machine, comprising: Step S1, collecting the speed data of the travel motor through a travel motor speed sensor installed at the travel motor of the pavement cold regeneration machine; Step S2: collecting piston displacement data in the milling drum cylinder through a milling drum cylinder displacement sensor installed in the milling drum cylinder of the pavement cold regeneration machine; Step S3: collecting the fuel consumption ΔQ signal through the fuel signal acquisition module; Step S4: The vehicle controller controls the pavement cold regeneration machine to operate in a preset engine medium-load power mode and a preset engine heavy-load power mode for a first preset time period respectively; Step S5: The vehicle controller calculates the corresponding working speed v of the pavement cold regeneration machine based on the travel motor speed data collected in each power mode; Step S6: The vehicle controller calculates the working depth h corresponding to the road surface cold regeneration machine based on the piston displacement data in the milling drum cylinder collected under each power mode; Step S7: The vehicle controller calculates the earthwork volume ψ per liter of fuel based on the working speed v, working depth h, fuel consumption ΔQ signal corresponding to each power mode, and the working time t collected by the timer built into the vehicle controller, and uses the earthwork volume ψ per liter of fuel as the fuel economy indicator; Step S8: The vehicle controller compares the fuel economy indicators under different power modes and selects the power mode with the larger fuel economy indicator value as the current operating mode; Step S9: Displaying the fuel economy index and the current working mode on the display; Step S10: The power actuator controls the operation of the pavement cold regeneration machine according to the current working mode.

[0057] In addition, before step S4, the method further includes: Step S0: The vehicle controller controls the pavement cold regeneration machine to operate in a preset engine no-load power mode for a second preset time period to obtain the basic fuel consumption of the pavement cold regeneration machine in the no-load power mode.

[0058] Specifically, step S7 includes: Step S71: According to the collected working speed v, working depth h and the preset regeneration working width W of the road surface cold regeneration machine, the formula Real-time calculation of earthwork workload V under each power mode; Step S72: Calculate the earthwork volume ψ per liter of fuel in each calculation cycle according to the preset calculation cycle using the formula ψ=V / △Q, and use the average value of the earthwork volume ψ per liter of fuel in N consecutive calculation cycles as the fuel economy indicator.

[0059] The present invention not only considers the fuel consumption, but also takes into account the key working parameters such as working speed v, working depth h and regeneration working width W. The earthwork volume V is calculated in real time for each power mode, and then the earthwork volume ψ (per liter of fuel consumed) is calculated using the formula ψ = V / △Q. This allows for a comprehensive and accurate assessment of fuel economy under different power modes. This comprehensive assessment avoids the one-sidedness of single-parameter evaluation and more accurately reflects the fuel efficiency of the equipment in actual operation.

[0060] In order to facilitate the staff to understand the working endurance of the road surface cold regeneration machine after selecting the working mode, the present invention also sets a fuel sensor 220 in the fuel tank 210. The fuel sensor 220 includes a float 221 and a wiring harness 222. The wiring harness 222 is connected to the vehicle controller. The float 221 outputs different oil level signals to the vehicle controller through the wiring harness 222. The vehicle controller calculates and outputs the remaining fuel capacity Q according to the received oil level signal according to the pre-stored calculation formula, and further calculates the working area S of the road surface cold regeneration machine, and outputs the calculated remaining fuel capacity Q and working area S to the display for display. Figure 3 As shown, taking a common trapezoidal fuel tank as an example, the calculation formulas for the remaining fuel capacity Q and the cruising range working area S are as follows: Q=(2a+X•tgα)•X•b / 1000=(X•2b•tgα+2a•b•X) / 1000; S=Q / δ; Where Q is the fuel capacity (L); a is the length of the fuel tank to the lowest liquid level (cm); b is the width of the fuel in the tank (cm); α is the distance between the hypotenuse of the fuel tank and the horizontal plane (°); X is the height from the liquid level in the tank to the zero point (cm); δ is the working area per liter of fuel (m / L).

[0061] The present invention also provides a computer storage medium, wherein the computer storage medium may store a program that, when executed, may include some or all of the steps of each embodiment provided herein. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0062] Those skilled in the art can clearly understand that the technical solutions in the embodiments of the present application can be implemented by means of software plus necessary universal hardware platforms. Based on such an understanding, the technical solutions in the embodiments of the present application can be embodied in the form of a software product, which can be stored in a storage medium, such as a USB flash disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, and includes a plurality of instructions for causing a computer terminal (which can be a personal computer, a server, or a second terminal, a network terminal, or the like) to execute all or part of the steps of the methods described in the embodiments of the present application.

[0063] The same or similar parts among the various embodiments in the specification can be referred to each other. In particular, for the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiments.

[0064] Although the present application has been described in detail through reference to preferred embodiments, the present application is not limited to such preferred embodiments. Various equivalent modifications or replacements can be made to the embodiments of the present application by those skilled in the art without departing from the spirit and essence of the present application, and such modifications or replacements shall be within the scope of the present application. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, and such changes or replacements shall be within the protection scope of the present application.

Claims

1. A power mode selection system for an engine in a pavement cold regeneration machine, characterized in that: include: The travel motor speed sensor is installed on the travel motor of the pavement cold regeneration machine to collect the travel motor speed data; The milling drum cylinder displacement sensor is installed in the milling drum cylinder of the road cold regeneration machine to collect the piston displacement data in the milling drum cylinder; Fuel signal acquisition module, used to collect fuel consumption △Q signal; a vehicle controller electrically connected to the travel motor speed sensor, the milling drum cylinder displacement sensor, and the fuel signal acquisition module, for controlling the pavement cold regeneration machine to operate for a first preset time in a preset engine medium-load power mode and a preset heavy-load power mode, respectively, and calculating a corresponding operating speed v of the pavement cold regeneration machine based on travel motor speed data collected in each power mode; Used to calculate the corresponding working depth h of the road cold regeneration machine based on the piston displacement data in the milling drum cylinder collected under each power mode; used to calculate the working earthwork volume ψ per liter of fuel based on the working speed v, working depth h, fuel consumption △Q signal corresponding to each power mode and the working time t collected by the timer built into the vehicle controller, and use the working earthwork volume ψ per liter of fuel as the fuel economy indicator; used to compare the fuel economy indicators under different power modes and select the power mode with the largest fuel economy indicator value as the current operating mode; Display, used to display fuel economy indicators and current working mode; The power actuator is electrically connected to the vehicle controller and is used to control the operation of the pavement cold regeneration machine according to the current working mode.

2. The power mode selection system of the engine in the pavement cold regeneration machine according to claim 1, characterized in that: The vehicle controller is further configured as follows: Before controlling the pavement cold regeneration machine to switch to the preset engine medium-load power mode and heavy-load power mode, first controlling the pavement cold regeneration machine to operate in the preset engine no-load power mode for a second preset time period to obtain a basic fuel consumption of the pavement cold regeneration machine in the no-load power mode; Furthermore, before calculating the working speed v and working depth h, the obtained working status data of the pavement cold regeneration machine under each power mode is analyzed for abnormalities, and when the working status data is abnormal, an alarm signal is issued and the operator is prompted through the display; at the same time, the pavement cold regeneration machine is automatically switched back to the previous power mode or the no-load power mode; And, according to the collected working speed v, working depth h and the preset regeneration working width W of the road cold regeneration machine, the formula Real-time calculation of earthwork workload V under each power mode; According to the preset calculation cycle, the earthwork volume ψ per liter of fuel in each calculation cycle is calculated using the formula ψ=V / △Q, and the average value of the earthwork volume ψ per liter of fuel in N consecutive calculation cycles is used as the fuel economy indicator.

3. The power mode selection system of the engine in the pavement cold regeneration machine according to claim 2, characterized in that: The display is further configured as: A real-time bar graph compares the earthwork volume per liter of fuel in medium-load and heavy-load power modes. When receiving the mode switching signal from the vehicle controller, the operator is reminded through flashing prompts and voice broadcasts; It stores mode switching records and corresponding fuel economy index data, and supports data export function.

4. The power mode selection system of the engine in the pavement cold regeneration machine according to claim 2, characterized in that: It also includes a display switch, which is connected to the display and is used to trigger the vehicle controller connected to the display to cumulatively calculate the working area A, working earthwork volume V, and fuel consumption of the road cold recycler from the moment the display switch is closed when the display switch is closed. and output the corresponding accumulated value to the display for display.

5. The power mode selection system of the engine in the pavement cold regeneration machine according to claim 1, characterized in that: Power actuators include: Engine power regulation module, used to adjust the output power of the engine; The power actuator synchronously adjusts the engine power parameters of the pavement cold regeneration machine according to the instructions sent by the vehicle controller to achieve mode switching.

6. The power mode selection system for the engine in the pavement cold regeneration machine according to claim 1, characterized in that: The fuel signal acquisition module includes an engine fuel inlet flow sensor and an engine oil return port flow sensor. The engine fuel inlet flow sensor is used to measure the fuel flow Q at the engine fuel inlet. 进 The engine oil return port flow sensor is used to measure the fuel flow Q at the engine oil return port. 回 , the vehicle controller is based on Q 进 and Q 回 Calculate the fuel consumption △Q signal, the calculation formula is: .

7. A method for selecting a power mode of an engine in a road surface cold regeneration machine, characterized in that: include: Step S1, collecting the speed data of the travel motor through a travel motor speed sensor installed at the travel motor of the pavement cold regeneration machine; Step S2: collecting piston displacement data in the milling drum cylinder through a milling drum cylinder displacement sensor installed in the milling drum cylinder of the pavement cold regeneration machine; Step S3: collecting the fuel consumption ΔQ signal through the fuel signal acquisition module; Step S4: The vehicle controller controls the pavement cold regeneration machine to operate in a preset engine medium-load power mode and a preset engine heavy-load power mode for a first preset time period respectively; Step S5: The vehicle controller calculates the corresponding working speed v of the pavement cold regeneration machine based on the travel motor speed data collected in each power mode; Step S6: The vehicle controller calculates the working depth h corresponding to the road surface cold regeneration machine based on the piston displacement data in the milling drum cylinder collected under each power mode; Step S7: The vehicle controller calculates the earthwork volume ψ per liter of fuel based on the working speed v, working depth h, fuel consumption ΔQ signal corresponding to each power mode, and the working time t collected by the timer built into the vehicle controller, and uses the earthwork volume ψ per liter of fuel as the fuel economy indicator; Step S8: The vehicle controller compares the fuel economy indicators under different power modes and selects the power mode with the larger fuel economy indicator value as the current operating mode; Step S9: Displaying the fuel economy index and the current working mode on the display; Step S10: The power actuator controls the operation of the pavement cold regeneration machine according to the current working mode.

8. The method for selecting the power mode of the engine in the pavement cold regeneration machine according to claim 7, characterized in that: Before step S4, the method further includes: Step S0: The vehicle controller controls the pavement cold regeneration machine to operate in a preset engine no-load power mode for a second preset time period to obtain the basic fuel consumption of the pavement cold regeneration machine in the no-load power mode.

9. The method for selecting the power mode of the engine in the pavement cold regeneration machine according to claim 7, characterized in that: Step S7 includes: Step S71: According to the collected working speed v, working depth h and the preset regeneration working width W of the road surface cold regeneration machine, the formula Real-time calculation of earthwork workload V under each power mode; Step S72: Calculate the earthwork volume ψ per liter of fuel in each calculation cycle according to the preset calculation cycle using the formula ψ=V / △Q, and use the average value of the earthwork volume ψ per liter of fuel in N consecutive calculation cycles as the fuel economy indicator.

10. The method for selecting the power mode of the engine in the pavement cold regeneration machine according to claim 7, characterized in that: Also includes: After the power mode of the engine in the pavement cold regeneration machine is set, the vehicle controller also obtains the oil level signal according to the fuel sensor set in the oil tank of the pavement cold regeneration machine, and calculates the remaining fuel capacity Q of the tank according to the oil level signal, and calculates the cruising working area S of the pavement cold regeneration machine according to the remaining fuel capacity Q, and outputs the calculated remaining fuel capacity Q and cruising working area S to the display for display.

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