Mode control method and device for hybrid garbage truck

Abstract

The invention relates to a mode control method and device for a hybrid garbage truck. The method comprises the steps that a multi-dimensional array generated in the multiple starting and stopping processes of the hybrid garbage truck and current driving data are obtained; the multi-dimensional array comprises the maximum running speed of the hybrid garbage truck in each starting and stopping process; the current driving data comprises the current electric quantity; according to the percentage that the maximum running speed in the multi-dimensional array is larger than the preset speed, the running scene of the hybrid garbage truck is determined; the operation scene is analyzed through the multi-dimensional array, so that frequent switching of the hybrid garbage truck is avoided; further, according to the current electric quantity, the electric quantity mode of the hybrid garbage truck is determined; the driving mode of the hybrid garbage truck is determined according to the operation scene and the electric quantity mode, the hybrid garbage truck is controlled according to the driving mode, and the driving mode is dynamically adjusted by combining the operation scene with the electric quantity state, so that the electric quantity consumption of a battery is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hybrid vehicles, in particular to a hybrid garbage truck mode control method and device. BACKGROUND

[0002] The prior art does not target the vehicle speed identification operation scene of the hybrid garbage truck, and the same control strategy is used in different vehicle speed scenes. Common control strategy one: switch the hybrid assembly mode according to the gear position of the gearbox. Below a certain gear position, it is a motor single drive mode, and above a certain gear position, it is an engine single drive mode. The mode switching process is coupled with the gear shifting process. Common control strategy two: switch the hybrid assembly mode according to the vehicle speed. Below a certain fixed vehicle speed, it is a motor single drive mode, and above a certain vehicle speed, it is an engine single drive mode.

[0003] The control strategy of coupling the hybrid assembly mode switching with the gear position has the following disadvantages: the gear shifting process involves engine speed control, clutch separation / coupling control, and gearbox pneumatic actuator control. The mode switching process involves engine start control and clutch separation / coupling control. The timing control of the gear shifting process and the mode switching process is complex, and the control targets may conflict with each other, resulting in frequent mode switching failures. The hybrid assembly mode switching according to the size of the vehicle speed may have two unreasonable situations: when the vehicle runs at a low speed for a long time, the hybrid assembly is in a motor single drive mode for a long time, causing the battery power to be consumed too quickly, and the vehicle needs to frequently generate power while driving or while parking, reducing system efficiency. When the vehicle runs at a high speed for a long time, the vehicle is in an engine single drive mode for a long time, and the battery is always in a high power state. When the vehicle enters the braking process, it cannot recover the braking energy, resulting in a decrease in the vehicle's fuel efficiency. When the vehicle speed changes quickly on complex roads, the vehicle will frequently switch between engine single drive and motor single drive modes, causing poor vehicle continuity and increasing the jerkiness.

[0004] Therefore, it is necessary to propose a hybrid garbage truck mode control method and device to solve the technical problems of frequent power generation while driving or parking and rapid battery power consumption caused by the control strategy based on the size of the vehicle speed in the prior art. SUMMARY

[0005] Therefore, it is necessary to propose a hybrid garbage truck mode control method and device to solve the technical problems of frequent power generation while driving or parking and rapid battery power consumption caused by the control strategy based on the size of the vehicle speed in the prior art.

[0006] To solve the above problems, in a first aspect, the present application provides a hybrid garbage truck mode control method, comprising: obtain a multi-dimensional array and current driving data generated by the hybrid garbage truck in multiple start-stop processes, wherein the multi-dimensional array comprises maximum driving speeds of the hybrid garbage truck in each start-stop process, and the current driving data comprises a current power; determine a running scenario of the hybrid garbage truck according to a percentage of the maximum driving speeds in the multi-dimensional array that are greater than a preset speed; determine a power mode of the hybrid garbage truck according to the current power; determine a driving mode of the hybrid garbage truck according to the running scenario and the power mode, and control the hybrid garbage truck according to the driving mode.

[0007] In a possible implementation, the multi-dimensional array generated by the hybrid garbage truck in multiple start-stop processes comprises: obtain a driving speed of the hybrid garbage truck in a current start-stop process; determine a maximum driving speed of the hybrid garbage truck in the current start-stop process when the driving speed is greater than zero; store the maximum driving speed in the current start-stop process into the multi-dimensional array.

[0008] In a possible implementation, the determination of the running scenario of the hybrid garbage truck according to the percentage of the maximum driving speeds in the multi-dimensional array that are greater than the preset speed comprises: determine whether the number of elements in the multi-dimensional array reaches a preset array dimension; if yes, determine whether the maximum driving speeds in the multi-dimensional array are greater than the preset speed one by one; when the percentage of the number of elements of the maximum driving speeds that are greater than the preset speed is greater than a hysteresis interval, determine that the running scenario of the hybrid garbage truck is a high vehicle speed scenario; when the percentage of the number of elements of the maximum driving speeds that are greater than the preset speed is less than or equal to the hysteresis interval, determine that the running scenario of the hybrid garbage truck is a low vehicle speed scenario.

[0009] In a possible implementation, the determination of the power mode of the hybrid garbage truck according to the current power comprises: determine whether the current power is greater than or equal to a first preset power of a preset switching conflict; if yes, determine that the power mode is a high power mode; if no, determine that the power mode is a low power mode.

[0010] In a possible implementation, the determination of the driving mode of the hybrid garbage truck according to the running scenario and the power mode comprises: switching the driving mode of the hybrid garbage truck to a pure electric driving mode when the hybrid garbage truck is in the low vehicle speed scene and the electric quantity mode is the high electric quantity mode; switching the driving mode of the hybrid garbage truck to an engine single driving mode when the hybrid garbage truck is in the high vehicle speed scene and the electric quantity mode is the high electric quantity mode.

[0011] In a possible implementation, the determining the driving mode of the hybrid garbage truck according to the running scene and the electric quantity mode further includes: switching the driving mode of the hybrid garbage truck to a driving power conservation mode when the hybrid garbage truck is in the low vehicle speed scene or the high vehicle speed scene and the electric quantity mode is the low electric quantity mode; the driving power conservation mode is driving the hybrid garbage truck by the engine, charging the hybrid garbage truck, and supplying power to the power take-off by the battery.

[0012] In a possible implementation, the charging the hybrid garbage truck further includes: updating the current electric quantity to obtain a new current electric quantity during the charging process; when the new current electric quantity is greater than or equal to a preset second electric quantity, controlling the hybrid garbage truck to exit the power conservation mode, and re-determining the driving mode of the hybrid garbage truck according to the new current electric quantity.

[0013] In a possible implementation, the method further includes: when receiving a braking working condition, controlling the hybrid garbage truck to start a motor braking mode, and converting kinetic energy into electric energy to charge the hybrid garbage truck in the motor braking mode; the braking working condition is receiving a brake request or using an auxiliary braking function.

[0014] In a possible implementation, the determining the driving mode of the hybrid garbage truck according to the running scene and the electric quantity mode further includes: when the electric quantity mode is the high electric quantity mode, controlling the power take-off of the hybrid garbage truck to be in a pure electric working state.

[0015] In a second aspect, the present application further provides a hybrid garbage truck mode control device, including: an array acquisition module configured to acquire a multi-dimensional array and current driving data generated by a hybrid garbage truck in a plurality of start-stop processes; the multi-dimensional array includes a maximum driving speed of the hybrid garbage truck in each start-stop process; and the current driving data includes a current electric quantity; The scenario determination module is used to determine the operating scenario of the hybrid garbage truck based on the percentage of the maximum driving speed that is greater than a preset speed in the multidimensional array. A power determination module is used to determine the power mode of the hybrid garbage truck based on the current power level. The mode determination module is used to determine the driving mode of the hybrid garbage truck based on the operating scenario and the power mode, and to control the hybrid garbage truck according to the driving mode.

[0016] The beneficial effects of this invention are as follows: It acquires a multidimensional array and current driving data generated during multiple start-stop cycles of the hybrid garbage truck; the multidimensional array includes the maximum driving speed of the hybrid garbage truck during each start-stop cycle; the current driving data includes the current battery level; based on the percentage of the maximum driving speed in the multidimensional array that exceeds a preset speed, the operating scenario of the hybrid garbage truck is determined; by analyzing the operating scenario through the multidimensional array, the switching of the operating scenario is controlled by the percentage, thereby avoiding frequent switching of the hybrid garbage truck; furthermore, based on the current battery level, the battery mode of the hybrid garbage truck is determined; based on the operating scenario and battery mode, the drive mode of the hybrid garbage truck is determined, and the hybrid garbage truck is controlled according to the drive mode. By dynamically adjusting the drive mode through the operating scenario combined with the battery status, battery power consumption is reduced. Attached Figure Description

[0017] Figure 1 A schematic flowchart of an embodiment of the hybrid garbage truck mode control method provided by the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of an embodiment of step S102; Figure 3 A schematic diagram of the structure of an embodiment of the high-speed operation scenario of the garbage collection vehicle provided by the present invention; Figure 4 A schematic diagram of a structure for an embodiment of the garbage truck operating at low speed provided by the present invention; Figure 5 This is a schematic diagram of an embodiment of the hybrid garbage truck mode control device provided by the present invention. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0019] like Figure 1 As shown in the figure, a specific embodiment of the present invention discloses a hybrid garbage truck mode control method, including: S101, acquire a multi-dimensional array and current driving data generated by the hybrid garbage truck in a plurality of start-stop processes; the multi-dimensional array includes the maximum driving speed of the hybrid garbage truck in each start-stop process; and the current driving data includes a current power.

[0020] The multi-dimensional array refers to a set of key parameters recorded in the start-stop process of the vehicle, which can be implemented by a circular queue or a fixed-length array, and is used to reflect the driving characteristics of the vehicle in different start-stop cycles.

[0021] S102, determine the running scenario of the hybrid garbage truck according to the percentage of the maximum driving speed in the multi-dimensional array being greater than a preset speed.

[0022] The determination of the running scenario depends on the historical vehicle speed distribution, for example, by counting the frequency of high vehicle speed, whether the vehicle is in a scenario that requires continuous power can be identified.

[0023] S103, determine the power mode of the hybrid garbage truck according to the current power.

[0024] The power mode is divided by comparing the current power with a preset threshold, for example, two-level division is used to simplify the control logic.

[0025] S104, determine the driving mode of the hybrid garbage truck according to the running scenario and the power mode, and control the hybrid garbage truck according to the driving mode.

[0026] The selection of the driving mode is determined by the combination of the scenario and the power.

[0027] The hybrid garbage truck mode control method provided by the embodiments of the application can be applied to a hybrid garbage truck mode control system, wherein the hybrid garbage truck mode control system can be a software system running on a terminal device, and the terminal device can be a hybrid vehicle. The embodiments of the application do not make any limitation on the specific type of the terminal device.

[0028] Specifically, the system first collects the maximum speed in the start-stop process of the vehicle and stores it in an array. When the amount of array data reaches a preset value, the high-speed ratio is calculated to determine the running scenario. At the same time, the battery power is monitored in real time, and if it is higher than the threshold, it is marked as a high-power mode. According to the combination result of the scenario and the power, for example, pure electric drive is enabled when low-speed scenario is combined with high power, and engine drive is switched to even if the power is sufficient in high-speed scenario, so as to avoid the decline of motor efficiency when driving at high speed. When the power is insufficient, no matter how the scenario is, the driving mode is started to ensure that the battery is maintained at a usable level. This strategy dynamically adjusts the driving mode through the cooperative analysis of historical data and real-time state.

[0029] Compared with the prior art, the embodiment provided obtains a multi-dimensional array and current driving data generated by the hybrid garbage truck in multiple start-stop processes; the multi-dimensional array includes maximum driving speeds of the hybrid garbage truck in each start-stop process; the current driving data includes a current power; a running scenario of the hybrid garbage truck is determined according to a percentage of the maximum driving speeds in the multi-dimensional array that are greater than a preset speed; the running scenario is analyzed through the multi-dimensional array, thereby avoiding frequent switching of the hybrid garbage truck; further, a power mode of the hybrid garbage truck is determined according to the current power; a driving mode of the hybrid garbage truck is determined according to the running scenario and the power mode, and the hybrid garbage truck is controlled according to the driving mode, the driving mode is dynamically adjusted through the running scenario combined with the power state, thereby reducing battery power consumption.

[0030] In some embodiments of the application, step S101 comprises: Obtaining a driving speed of the hybrid garbage truck in a current start-stop process.

[0031] The driving speed refers to a real-time instantaneous speed value collected in a single start-stop cycle of the vehicle, which can be collected and recorded in real time by a vehicle-mounted speed sensor, and is used to reflect the dynamic behavior of the vehicle in the start-stop process.

[0032] When the driving speed is greater than zero, the maximum driving speed of the hybrid garbage truck in the current start-stop process is determined.

[0033] The maximum driving speed refers to the highest value of the driving speed in a single start-stop cycle, which can be realized by comparing all instantaneous speed values in the current start-stop cycle and extracting the maximum value, and is used to represent the driving intensity of the vehicle in the cycle.

[0034] The maximum driving speed in the current start-stop process is stored in a multi-dimensional array.

[0035] The multi-dimensional array refers to a data structure for storing maximum driving speeds in multiple start-stop cycles, which can be realized by using a queue or a ring buffer, and is used to record driving characteristics of historical start-stop cycles.

[0036] Specifically, during vehicle operation, the data collection module is started at the beginning of each start-stop cycle, and the driving speed is continuously monitored. When it is detected that the driving speed is greater than zero, it indicates that the vehicle enters the driving state, at which time the maximum driving speed value in the current start-stop cycle is updated in real time. When the vehicle completes a start-stop cycle, the maximum driving speed value calculated in the cycle is stored at the end of the multi-dimensional array, replacing the earliest historical data or adding a new storage unit. By continuously updating the multi-dimensional array, a data set containing maximum speeds of multiple historical start-stop cycles is formed, providing basic data support for subsequent running scenario judgment.

[0037] In some embodiments of the application, asFigure 2 As shown in FIG. 1, step S102 includes: S201, judging whether the number of elements in the multi-dimensional array reaches a preset array dimension.

[0038] The multi-dimensional array refers to a data set storing the maximum driving speed in the start-stop process, and can be implemented by using a circular queue or a fixed-length array structure, and is used to record the historical driving state of the vehicle. The preset array dimension refers to a minimum data amount threshold required for triggering the scene judgment, and can be set to, for example, 10 start-stop records, to ensure that the statistical result is representative.

[0039] S202, if yes, judging whether the maximum driving speed in the multi-dimensional array is greater than a preset speed one by one.

[0040] The preset speed refers to a critical value for distinguishing high and low vehicle speed scenes, and can be set to, for example, 30 km / h, and is calibrated according to the characteristics of the vehicle power system.

[0041] S203, when the percentage of the number of elements of the maximum driving speed greater than the preset speed is greater than a hysteresis interval, determining that the running scene of the hybrid garbage truck is a high vehicle speed scene.

[0042] The hysteresis interval can be divided by a preset percentage, and the preset percentage refers to a proportion threshold for dividing the scene type, and can be set to, for example, 60%, and when the historical data exceeding the proportion reaches the preset speed, it is determined as a high vehicle speed scene. For example, Figure 3 As shown in FIG. 2, Figure 3 is a high vehicle speed running scene of the garbage collection truck, the x-axis is time, and the y-axis is vehicle speed. As shown in FIG. 2, Figure 3 It can be seen that the driving condition of the hybrid garbage truck between 8:30 and 13:00, when the vehicle speed is greater than 0, a set of start-stop is started, and when it is zeroed, a start-stop process is ended. The maximum speed in the process can be determined, Figure 3 It is shown that when the percentage of the number of elements of the maximum driving speed greater than the preset speed is greater than the hysteresis interval, it is in a high vehicle speed scene, and the hysteresis interval can avoid frequent switching of the identified scene.

[0043] S204, when the percentage of the number of elements of the maximum driving speed greater than the preset speed is less than or equal to the hysteresis interval, determining that the running scene of the hybrid garbage truck is a low vehicle speed scene.

[0044] In the embodiment of the application, as shown in FIG. 3, Figure 4 As shown in FIG. 3, Figure 4 is a low vehicle speed running scene of the garbage collection truck, the x-axis is time, and the y-axis is vehicle speed. As shown in FIG. 3, Figure 4It can be seen that the hybrid garbage truck is running between 8:00 and 12:30, when the vehicle speed starts to be greater than 0, a set of start-stop starts, and when it is zero, a start-stop process ends, and the maximum speed in the process can be determined, Figure 4 The percentage of elements representing the maximum driving speed greater than the preset speed is less than or equal to the hysteresis interval, and the vehicle is in a low speed scene.

[0045] Specifically, the vehicle continuously records the maximum driving speed of each start-stop cycle during operation and stores it in a multi-dimensional array. When the amount of data in the array reaches the preset dimension, the system traverses all elements and compares them with the preset speed. If the number of elements exceeding the preset speed exceeds the hysteresis interval, it is determined that the vehicle is in a high speed scene; otherwise, it is determined to be in a low speed scene. For example, if the preset array dimension is 10 times, the preset speed is 30 km / h, and the hysteresis interval is 60%, if there are 7 times in the array that the maximum speed exceeds 30 km / h, the high speed scene determination is triggered. If the amount of data in the array does not reach the preset dimension, the next driving data of the hybrid garbage truck is detected again.

[0046] Through the above technical solutions, the application effectively solves the problem of frequent mode switching caused by real-time speed fluctuations, accurately identifies the long-term running scene of the vehicle through historical data analysis, and makes the driving mode switching decision more in line with the actual working condition demand. At the same time, the data accumulation mechanism of the multi-dimensional array avoids misjudgment caused by short-time speed changes, and improves the stability and reliability of the mode switching.

[0047] In some embodiments of the application, step S103 comprises: determining whether the current power is greater than or equal to a first preset power of a preset switching conflict.

[0048] The current power refers to the remaining available energy value of the power battery, which can be obtained by integrating the voltage and current data collected by the battery management system in real time, and is used to represent the available energy reserve state of the vehicle. The first preset power of the preset switching conflict refers to a pre-set power threshold, which can be calibrated using a fixed percentage value such as 80%, and is used to divide the dividing point between high power and low power states.

[0049] If yes, the power mode is determined to be a high power mode; If no, the power mode is determined to be a low power mode.

[0050] The high power mode refers to a state of sufficient battery energy reserve, which can be realized by limiting the engine intervention frequency and preferentially calling the motor drive, thereby reducing fuel consumption. The low power mode refers to a state of insufficient battery energy reserve, which can be realized by activating the engine drive and controlling the generator set to charge the battery, thereby maintaining system energy balance.

[0051] Specifically, during the operation of the vehicle, the battery management system continuously monitors the current power and transmits real-time data to the control unit. The control unit compares the current power with the first preset power of the preset switching conflict threshold, and if the current power reaches or exceeds the first preset power of the preset switching conflict, such as SOC≥20%, it is determined that the vehicle is in a high power mode, at which time the pure electric driving strategy is preferred to reduce fuel consumption; if the current power is lower than the first preset power of the preset switching conflict, such as SOC<20%, it is determined that the vehicle is in a low power mode, at which time the engine is started and the charging mechanism is triggered to maintain the battery energy reserve. The judgment process is independent of the vehicle speed scene recognition module, and by decoupling the correlation between the power state and the driving condition, control conflicts caused by single parameter triggering mode switching are avoided.

[0052] In some embodiments of the present application, step S104 comprises: When the hybrid garbage truck is in a low speed scene and the power mode is in a high power mode, the driving mode of the hybrid garbage truck is switched to a pure electric driving mode.

[0053] Wherein, the low speed scene refers to the running scene determined by the percentage of the number of elements in the multidimensional array whose maximum driving speed is greater than the preset speed being less than or equal to the preset percentage, which can be realized by collecting data through a speed sensor and calculating the percentage in combination with a controller, and is used to represent that the vehicle is mainly in a low speed driving state during the start-stop process. The high power mode refers to the power state determined when the current power is greater than or equal to the first preset power of the preset switching conflict, which can be determined by monitoring the voltage or the remaining capacity percentage through a battery management system, for example, when the power reaches 20% or more, the mode is triggered to ensure that the vehicle has sufficient power reserve.

[0054] When the hybrid garbage truck is in a high speed scene and the power mode is in a high power mode, the driving mode of the hybrid garbage truck is switched to an engine single drive mode.

[0055] Wherein, the pure electric driving mode refers to driving the vehicle only by the motor, which can be realized by disconnecting the clutch and turning off the engine, at which time the power system only relies on the battery for power supply. The engine single drive mode refers to driving the vehicle only by the engine, which can be realized by combining the clutch and stopping the motor output, at which time the power system relies on fuel to provide energy.

[0056] Specifically, in the low vehicle speed scenario, the vehicle frequently starts and stops and the driving speed is low. If the battery power is sufficient, the pure electric driving mode is adopted to reduce the engine running time and reduce fuel consumption and noise. In the high vehicle speed scenario, the vehicle needs to drive at high speed continuously. At this time, the engine single drive mode can provide stable power output to avoid the efficiency decline caused by long-time high-load operation of the motor. By combining the running scenario and the power state for mode switching, the mode conflict or frequent switching problem caused by a single control strategy can be avoided.

[0057] In some embodiments of the application, step S104 further comprises: When the power mode is a high power mode, the power takeoff of the hybrid garbage truck is controlled to be in a pure electric operation state.

[0058] The power takeoff refers to a mechanical transmission component that transmits power to the on-board working device, which can be implemented by a mechanical transmission shaft or a hydraulic pump. Its function is to convert the energy of the vehicle power system into mechanical energy required for garbage compression, lifting and other working functions. The high power mode refers to a state in which the remaining battery power is higher than a preset threshold, which can be realized by real-time monitoring of the voltage parameter by the battery management system to determine whether the pure electric driving condition is met. The pure electric operation state refers to a working mode in which the power takeoff is driven by the motor only, which can be realized by disconnecting the mechanical connection between the power takeoff and the engine and establishing a power transmission path between the motor and the power takeoff. In this state, the engine does not need to be started to complete the working function.

[0059] Specifically, when the garbage truck performs loading, compression or unloading operation, if it is detected that the battery power is in a high power mode, the power coupling device between the power takeoff and the engine is preferentially disconnected, for example, the mechanical connection is disconnected by an electromagnetic clutch. At this time, the motor directly drives the power takeoff to rotate, driving the hydraulic pump or mechanical linkage to perform the garbage compression box operation. During this process, the engine remains in a stopped state, avoiding the forced start of the engine due to the demand of the working function, thereby eliminating the control conflict between the power mode switching and the working condition.

[0060] In some specific embodiments, when the vehicle performs garbage collection operation, if the battery power is maintained above a preset threshold, the motor can independently drive the power takeoff to drive the hydraulic system to work, completing the compression action of the garbage box. During garbage transfer, if it is continuously in a high power mode, the compression mechanism driven by the power takeoff is powered by the motor throughout the process, and the engine only intervenes when the driving demand exceeds the power of the motor.

[0061] In some embodiments of the application, step S104 further comprises: When the hybrid garbage truck is in a low vehicle speed scene or a high vehicle speed scene and the electric quantity mode is a low electric quantity mode, the driving mode of the hybrid garbage truck is switched to a driving and power preserving mode; the driving and power preserving mode is to drive the hybrid garbage truck through the engine and charge the hybrid garbage truck, and to supply power to the power take-off device through the battery.

[0062] The driving and power preserving mode means that the engine simultaneously undertakes the dual tasks of driving the vehicle and driving the generator to charge the battery, and can be realized by adjusting an engine output power distribution strategy, and is used for maintaining or improving the battery electric quantity during driving.

[0063] Specifically, when the vehicle is in the low electric quantity mode, the driving and power preserving mode is preferentially started regardless of whether the current running scene is a low vehicle speed or a high vehicle speed. In this mode, the engine directly drives the vehicle through a mechanical transmission system, and simultaneously charges the battery through the generator by converting part of the power into electric energy. This mode avoids further reduction of the battery electric quantity by continuous charging, and improves energy utilization by using the high-efficiency working interval of the engine. For example, during garbage collection work, the vehicle frequently starts and stops and has a low speed, and if the battery electric quantity is insufficient at this time, the system automatically switches to the driving and power preserving mode, thereby ensuring the continuity of work and gradually restoring the battery energy storage.

[0064] In some embodiments of the present application, after charging the hybrid garbage truck, the method further comprises: updating the current electric quantity to obtain a new current electric quantity during the charging process; When the new current electric quantity is greater than or equal to a preset second electric quantity, the hybrid garbage truck is controlled to exit the power preserving mode, and the driving mode of the hybrid garbage truck is re-determined according to the new current electric quantity.

[0065] The new current electric quantity refers to the real-time monitored remaining capacity of the battery during the charging process, which can be calculated by collecting voltage and current data through a battery management system, and is used for dynamically reflecting the charging progress. The preset second electric quantity refers to an electric quantity threshold for triggering the exit of the power preserving mode, which can be set as a certain proportion of the total capacity of the battery, for example, SOC≥70, and is used for judging whether the battery has recovered to a state capable of supporting pure electric driving.

[0066] Specifically, in the driving and power preserving mode, the engine drives the vehicle while charging the battery, and at this time the battery electric quantity continuously rises. By periodically collecting battery state data, for example, updating the current electric quantity every 5 seconds, a new current electric quantity is generated. When the new current electric quantity reaches or exceeds the preset second electric quantity, it indicates that the battery has sufficient energy reserve, at which time the power preserving mode is exited, the engine charging is stopped, and the driving mode judgment process is re-entered. For example, if the new current electric quantity meets the high electric quantity mode condition, the driving mode is switched to pure electric driving or engine single driving according to the current running scene.

[0067] In some embodiments of the present application, the method further comprises: When a braking condition is received, the control hybrid garbage truck starts the motor braking mode, and in the motor braking mode, the kinetic energy is converted into electric energy to charge the hybrid garbage truck. The braking condition is receiving a brake request or using an auxiliary braking function.

[0068] Wherein, the braking condition refers to a driving state that triggers the vehicle to decelerate or stop, which can be identified by brake pedal sensor signal or auxiliary braking function switch signal, for example, when the brake pedal stroke exceeds the preset threshold or the retarder is activated, it is determined that the braking condition is met. It can be understood that on this vehicle, as long as the brake is stepped on or any auxiliary braking function is used, the electric motor will be used to generate braking force first, and in this process, the electric motor will become a generator to recover the kinetic energy of the vehicle during deceleration and convert it into electric energy to charge the battery.

[0069] Specifically, when the vehicle is in the braking condition, the control unit first detects the brake request signal or the auxiliary braking function activation signal, and then sends a braking instruction to the motor controller. The motor controller adjusts the phase of the stator winding current to make the motor generate an electromagnetic torque opposite to the rotation direction, at this time the vehicle kinetic energy drives the motor rotor to rotate and generate electricity through the transmission system. The generated three-phase alternating current is rectified by the inverter, and the charging current and voltage are controlled by the battery management system to store the electric energy to the power battery. In this process, the mechanical braking system can dynamically adjust the hydraulic braking force according to the size of the motor braking torque, and preferentially use the motor braking to reduce mechanical friction loss.

[0070] Further, in both high-speed and low-speed scenarios, the motor recovers energy in the braking condition when the high-voltage system is fault-free and the battery is not overcharged. Specifically, the high-voltage system of the vehicle (including the battery pack, the motor, the electric control, the high-voltage wire harness, etc.) must work normally. If the system detects any fault (such as insulation fault, motor overheating, etc.), in order to ensure safety, energy recovery will be prohibited or limited to prevent further problems caused by energy recovery. The battery must have enough "space" to receive the recovered electric energy. If the battery is fully charged (SOC 100%) or the temperature is too low / high, the charging capacity is limited, the system will also limit or stop energy recovery, otherwise forcibly charging the full battery will damage the battery.

[0071] In order to better implement the hybrid garbage truck mode control method in the embodiments of the present application, on the basis of the hybrid garbage truck mode control method, the embodiments of the present application also provide a hybrid garbage truck mode control device, as shown in Figure 5 The hybrid garbage truck mode control device 500 comprises: The array acquisition module 501 is configured to acquire a multi-dimensional array and current driving data generated by the hybrid garbage truck in a plurality of start-stop processes; the multi-dimensional array includes a maximum driving speed of the hybrid garbage truck in each start-stop process; and the current driving data includes a current power; The scene determination module 502 is configured to determine a running scene of the hybrid garbage truck according to a percentage of maximum driving speeds greater than a preset speed in the multi-dimensional array. The power determination module 503 is configured to determine a power mode of the hybrid garbage truck according to the current power. The mode determination module 504 is configured to determine a driving mode of the hybrid garbage truck according to the running scene and the power mode, and to control the hybrid garbage truck according to the driving mode.

[0072] The hybrid garbage truck mode control device 500 provided by the above embodiment can implement the technical solutions described in the hybrid garbage truck mode control method embodiment, and the principles of the implementation of the above modules or units can be referred to the corresponding content in the hybrid garbage truck mode control method embodiment, which will not be described here.

[0073] The hybrid garbage truck mode control method and device provided by the present application are described in detail above, and the principles and implementation modes of the present application are described by applying specific examples. The above embodiment is only used to help understand the method and its core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A hybrid garbage truck mode control method, characterized in that, include: Obtain the multidimensional array and current driving data generated by the hybrid garbage truck during multiple start-stop processes; The multidimensional array includes the maximum driving speed of the hybrid garbage truck during each start-stop process; the current driving data includes the current battery level; The operating scenario of the hybrid garbage truck is determined based on the percentage of the maximum driving speed that is greater than the preset speed in the multidimensional array. Based on the current battery level, determine the battery mode of the hybrid garbage truck; The driving mode of the hybrid garbage truck is determined based on the operating scenario and the power mode, and the hybrid garbage truck is controlled according to the driving mode.

2. The hybrid garbage truck mode control method according to claim 1, characterized in that, The acquisition of the multi-dimensional array generated during the multiple start-stop processes of the hybrid garbage truck includes: Obtain the speed of the hybrid garbage truck during the current start-stop process; When the driving speed is greater than zero, determine the maximum driving speed of the hybrid garbage truck during the current start-stop process; The maximum driving speed during the current start-stop process is stored in the multidimensional array.

3. The hybrid garbage truck mode control method according to claim 1, characterized in that, The step of determining the operating scenario of the hybrid garbage truck based on the percentage of the maximum driving speed exceeding a preset speed in the multidimensional array includes: Determine whether the number of elements in the multidimensional array has reached the preset array dimension; If so, then determine one by one whether the maximum driving speed in the multidimensional array is greater than the preset speed; When the percentage of elements whose maximum driving speed is greater than the preset speed is greater than the hysteresis interval, the operating scenario of the hybrid garbage truck is determined to be a high-speed scenario. When the percentage of elements with a maximum driving speed greater than the preset speed is less than or equal to the hysteresis interval, the operating scenario of the hybrid garbage truck is determined to be a low-speed scenario.

4. The hybrid garbage truck mode control method according to claim 3, characterized in that, Determining the power mode of the hybrid garbage truck based on the current power level includes: Determine whether the current battery level is greater than or equal to a first preset battery level; If so, then the power mode is determined to be high power mode; If not, then the power mode is determined to be low power mode.

5. The hybrid garbage truck mode control method according to claim 4, characterized in that, Determining the driving mode of the hybrid garbage truck based on the operating scenario and the power mode includes: When the hybrid garbage truck is in the low-speed scenario and the power mode is the high power mode, the driving mode of the hybrid garbage truck is switched to pure electric driving mode. When the hybrid garbage truck is in the high-speed scenario and the battery mode is the high-battery mode, the drive mode of the hybrid garbage truck is switched to engine single-drive mode.

6. The hybrid garbage truck mode control method according to claim 4, characterized in that, The step of determining the driving mode of the hybrid garbage truck based on the operating scenario and the power mode further includes: When the hybrid garbage truck is in the low-speed scenario or the high-speed scenario, and the power mode is the low-power mode, the driving mode of the hybrid garbage truck is switched to the driving power-saving mode; the driving power-saving mode is to drive the hybrid garbage truck through the engine, charge the hybrid garbage truck, and supply power to the power take-off unit through the battery.

7. The hybrid garbage truck mode control method according to claim 6, characterized in that, After charging the hybrid garbage truck, the process also includes: The current battery level is updated during the charging process to obtain a new current battery level; When the new current battery level is greater than or equal to a preset second battery level, the hybrid garbage truck is controlled to exit the power-saving mode, and the driving mode of the hybrid garbage truck is re-determined based on the new current battery level.

8. The hybrid garbage truck mode control method according to claim 1, characterized in that, The method further includes: When a braking condition is received, the hybrid garbage truck is controlled to start the motor braking mode, and in the motor braking mode, kinetic energy is converted into electrical energy to charge the hybrid garbage truck; the braking condition is receiving a braking request or using the auxiliary braking function.

9. The hybrid garbage truck mode control method according to claim 5, characterized in that, The step of determining the driving mode of the hybrid garbage truck based on the operating scenario and the power mode further includes: When the power mode is the high power mode, the power take-off of the hybrid garbage truck is controlled to operate in pure electric mode.

10. A hybrid garbage truck mode control device, characterized in that, include: The array acquisition module is used to acquire the multidimensional array generated by the hybrid garbage truck during multiple start-stop processes and the current driving data; The multidimensional array includes the maximum driving speed of the hybrid garbage truck during each start-stop process; the current driving data includes the current battery level; The scenario determination module is used to determine the operating scenario of the hybrid garbage truck based on the percentage of the maximum driving speed that is greater than a preset speed in the multidimensional array. A power determination module is used to determine the power mode of the hybrid garbage truck based on the current power level. The mode determination module is used to determine the driving mode of the hybrid garbage truck based on the operating scenario and the power mode, and to control the hybrid garbage truck according to the driving mode.

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