Electric drive axle control method of new energy environmental sanitation vehicle and related device

Abstract

The invention discloses an electric drive axle control method of a new energy environmental sanitation vehicle and a related device, and the economical efficiency of the new energy environmental sanitation vehicle is improved while it is ensured that the new energy environmental sanitation vehicle has sufficient power performance. The electric drive axle comprises a transmission, a differential mechanism, a single-gear speed reducer, a power takeoff, a first motor, a second motor, a first coupling element and a second coupling element. The transmission comprises a first-gear gear set, a second-gear gear set and a gear shifting element. An output shaft of the first motor is connected between input shafts of the first-gear gear set and the second-gear gear set in a switching mode through a gear shifting element. The output shaft of the transmission is connected with the input end of the differential mechanism; an output shaft of the second motor is connected with an input shaft of the single-gear speed reducer; an output shaft of the single-gear speed reducer is connected with the input end of the differential mechanism through a first coupling element and connected with an input shaft of the power takeoff through a second coupling element. And the power takeoff is used for transmitting power from the second motor to the loading equipment.

Description

Technical Field

[0001] The present application relates to the technical field of new energy sanitation vehicles, and in particular to an electric drive axle control method and related devices for new energy sanitation vehicles. Background Art

[0002] The main task of sanitation vehicles is to operate at low speeds, but they also need to be able to operate at high speeds in certain situations. In order to meet the dual needs of low-speed operation and high-speed operation, traditional new energy sanitation vehicles generally use a single high-power drive motor. This design can show good power performance when operating at high speeds, but under the common working condition of low-speed operation, it is difficult for the high-power drive motor to maintain operation in a high-efficiency range.

[0003] In addition, the operation of the upper equipment of sanitation vehicles (usually including sweeping brushes, fans, high-pressure water pumps, low-pressure water pumps, oil pumps and other operating devices) usually requires the installation of an additional independent motor to drive. This motor is designed to operate only when there is a need for upper equipment operation, and stop when the sanitation vehicle is simply driving. Therefore, the operating utilization rate of this motor is relatively low, which indirectly increases the cost of sanitation vehicles.

[0004] Therefore, how to ensure that new energy sanitation vehicles have sufficient power while improving their economy is an urgent problem to be solved in this field. Summary of the invention

[0005] In view of the above problems, this application provides a method and related device for controlling an electric drive axle of a new energy sanitation vehicle, so as to ensure that the new energy sanitation vehicle has sufficient power while improving its economy. The specific scheme is as follows:

[0006] In a first aspect, the present application provides an electric drive axle of a new energy sanitation vehicle, comprising: a transmission, a differential, a single-speed reducer, a power take-off, a first motor, a second motor, a first coupling element, and a second coupling element;

[0007] The transmission comprises a first gear set, a second gear set and a shift element; the output shaft of the first motor is switched and connected between the first gear set and the input shaft of the second gear set through the shift element;

[0008] The output shaft of the transmission is connected to the input end of the differential;

[0009] The output shaft of the second motor is connected to the input shaft of the single-speed reducer; the output shaft of the single-speed reducer is connected to the input end of the differential via a first coupling element, and is connected to the input shaft of the power take-off via a second coupling element; the power take-off is used to transmit power from the second motor to the upper equipment.

[0010] In a possible implementation, the first motor and the second motor are symmetrically arranged on both sides of the axle.

[0011] In one possible implementation, the power take-off is arranged in such a manner that the axis connecting the input and output shafts of the power take-off is parallel to the width direction of the new energy sanitation vehicle; or, the axis connecting the input and output shafts of the power take-off is parallel to the length direction of the new energy sanitation vehicle.

[0012] A second aspect of the present application provides a method for controlling an electric drive axle of a new energy sanitation vehicle, which is applied to an electric drive axle of a new energy sanitation vehicle according to the first aspect or any implementation of the first aspect, and the method comprises:

[0013] Determine the current operating condition of the vehicle;

[0014] When the vehicle is in a low-speed driving operation state and the first motor has sufficient power, the shift element is controlled to be combined with the first gear gear set, and the first coupling element is controlled to be disconnected and the second coupling element is in a connected state:

[0015] When the vehicle is in a low-speed driving operation state but the power of the first motor is insufficient, the shift element is controlled to be combined with the first gear gear set, and the first coupling element and the second coupling element are controlled to be in a connected state:

[0016] When the vehicle is in a high-speed driving state and the power of the first motor is sufficient, the shift element is controlled to be coupled with the second-gear gear set, and the first coupling element and the second coupling element are controlled to be disconnected:

[0017] When the vehicle is in a high-speed driving state and the first motor is underpowered, the shift element is controlled to be coupled with the second gear set, and the second coupling element is controlled to be disconnected and the first coupling element is in a connected state.

[0018] In a possible implementation, the electric drive axle control method for the new energy sanitation vehicle further includes: during the transmission shifting process, keeping the first coupling element in a connected state.

[0019] A third aspect of the present application provides a vehicle controller, comprising at least one processor and a memory connected to the processor, wherein:

[0020] The memory is used to store computer programs;

[0021] The processor is used to execute the computer program so that the vehicle controller can implement the electric drive axle control method of a new energy sanitation vehicle as described in the second aspect or any implementation method of the second aspect.

[0022] The fourth aspect of the present application provides a computer program product, including computer-readable instructions. When the computer-readable instructions are executed on a vehicle controller, the vehicle controller implements the electric drive axle control method of a new energy sanitation vehicle according to the first aspect or any implementation method of the first aspect.

[0023] A fifth aspect of the present application provides a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by a vehicle controller, the vehicle controller can implement the electric drive axle control method of a new energy sanitation vehicle according to the above-mentioned first aspect or any implementation method of the first aspect.

[0024] By means of the above technical solution, based on the system architecture of the electric drive axle of the new energy sanitation vehicle provided by this application, by controlling the connection state of the first coupling element and the second coupling element, the second motor can provide driving force for the upper equipment, and can also work in conjunction with the first motor to jointly provide a stronger driving force for the vehicle to travel. This design allows the vehicle to achieve the power output required for vehicle travel by combining two low-power motors (i.e., the first motor and the second motor) without increasing the power of a single motor. After the first motor is designed as a low-power motor, there are: when the vehicle is traveling at a low speed, the first motor can work alone or in conjunction with the second motor at a lower power to meet the vehicle power demand while maintaining operation in a high-efficiency range; when the vehicle is traveling at a high speed, although the power demand increases, the second motor joins in to share the load to avoid overloading the first motor, so that it can still maintain operation in a high-efficiency range. The two motors are flexibly coordinated and efficient throughout the process, ensuring that the new energy sanitation vehicle is sufficiently powered and economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0026] Figure 1 A schematic diagram of the structure of an electric drive axle of a new energy sanitation vehicle provided in this application;

[0027] Figure 2 A schematic diagram of the structure of an electric drive axle of another new energy sanitation vehicle provided in this application;

[0028] Figure 3 A flow chart of a method for controlling an electric drive axle of a new energy sanitation vehicle provided in this application.

[0029] Reference numerals:

[0030] M1-first motor; M2-second motor; 11-first gear set; 12-second gear set; 13-shift element; 14-differential; 15-half shaft; 21-first coupling element; 22-second coupling element; 23-single-speed reducer. DETAILED DESCRIPTION

[0031] The main task of sanitation vehicles is to carry out garbage collection and road sweeping in urban streets, parks, communities and other areas. These tasks usually require sanitation vehicles to travel at a low speed and in a stable manner (for example, the common speed of highway sweepers is between 8km / h and 20km / h) in order to better complete the cleaning tasks.

[0032] Although the main task of sanitation vehicles is to operate at low speeds, in certain situations, such as when transferring (from one work area to another) or performing long-distance transportation tasks, sanitation vehicles also need to be able to travel at high speeds. In order to meet the dual needs of low-speed operation and high-speed driving, traditional new energy sanitation vehicles generally adopt a single high-power drive motor design.

[0033] This design can show good power performance when driving at high speeds, because the high-power drive motor can provide sufficient power support. However, under the common working condition of low-speed driving, it is difficult for the high-power drive motor to maintain operation in the high-efficiency range (the high-efficiency range refers to the motor working under specific speed and torque conditions, and can achieve the best energy conversion efficiency. Once the motor deviates from this high-efficiency range, its energy conversion efficiency will drop significantly, resulting in energy waste and reduced efficiency). This is because the high-power drive motor is mainly designed for high-speed vehicle driving scenarios. When the vehicle is driving at low speed, due to the relatively low speed, the high-power drive motor often cannot give full play to its design advantages, resulting in its efficiency and energy consumption performance is not ideal.

[0034] In addition, the operation of the upper equipment of sanitation vehicles (usually including sweeping brushes, fans, high-pressure water pumps, low-pressure water pumps, oil pumps and other operating devices) usually requires the installation of an additional independent motor (usually called an upper motor) to drive it. This motor is designed to operate only when there is a need for upper operation, and remain in a non-operating state when the sanitation vehicle is in motion but not performing upper operation. Therefore, the operating utilization rate of this motor is relatively low, which indirectly increases the cost of sanitation vehicles.

[0035] Therefore, for new energy sanitation vehicles, the current urgent problem to be solved is how to ensure that the vehicle has sufficient power (vehicle power refers to the driving force and speed performance that the vehicle can exert during driving. The driving force is mainly generated by the vehicle's drive motor and transmitted to the drive wheels through the transmission system, allowing the vehicle to travel normally under various road conditions) while improving its economy (vehicle economy refers to the vehicle's ability to complete unit transportation operations with the lowest power consumption. This definition reflects the cost-effectiveness of the vehicle during use, that is, the vehicle consumes the least amount of electricity when completing a certain amount of transportation work).

[0036] To solve the above problems, the present application provides an electric drive axle for a new energy sanitation vehicle. The electric drive axle is the power source of the new energy sanitation vehicle and is responsible for converting the electrical energy provided by the battery pack into mechanical energy to propel the vehicle forward.

[0037] In conjunction with the accompanying drawings, an electric drive axle of a new energy sanitation vehicle provided in an embodiment of the present application is described in detail below. A person skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0038] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attributes when describing in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0039] See also Figure 1 , an electric drive axle of a new energy sanitation vehicle provided in an embodiment of the present application includes: a transmission, a differential 14, a single-speed reducer 23, a power take-off, a first motor M1, a second motor M2, a first coupling element 21 and a second coupling element 22;

[0040] The transmission includes a first gear set 11, a second gear set 12 and a shift element 13; the output shaft of the first motor M1 is switched between the first gear set 11 and the input shaft of the second gear set 12 through the shift element 13;

[0041] The output shaft of the transmission is connected to the input end of the differential 14 through a gear (the input end of the differential 14 refers to the part of the differential 14 that receives power input);

[0042] The output shaft of the second motor M2 is connected to the input shaft of the single-speed reducer 23; the output shaft of the single-speed reducer 23 is connected to the input end of the differential 14 via the first coupling element 21 (the first coupling element 21 is also connected to the input end of the differential 14 through gears), and is connected to the input shaft of the power take-off via the second coupling element 22; the power take-off is used to transmit power from the second motor M2 to the upper equipment to drive the upper equipment to operate.

[0043] Next, combine Figure 1 , the working principle of the embodiment of the present application is described in detail:

[0044] The shift element 13 is a key component in the transmission for switching different gears. It realizes the switching between the first gear ratio and the second gear ratio by combining with the first gear gear set 11 or the second gear gear set 12 to meet the different requirements of low-speed driving and high-speed driving.

[0045] Specifically, when the shift element 13 is combined with the first gear gear set 11, the transmission enters the first gear ratio, which is more suitable for low-speed driving and scenarios requiring high torque. At this time, the speed of the first motor M1 is transmitted through the first gear gear set 11 and converted into the driving force of the vehicle at a higher speed ratio. Since the first gear speed is relatively high, the first motor M1 can output a large torque at a lower speed, which enables the vehicle to travel smoothly in situations requiring high torque such as starting, climbing or crossing rugged roads.

[0046] When the shift element 13 is combined with the second gear set 12, the transmission enters the second gear ratio, which is more suitable for high-speed driving. At this time, the speed of the first motor M1 is transmitted through the second gear set 12 and converted into the driving force of the vehicle at a lower speed ratio. Since the second gear speed ratio is low, the first motor M1 can appropriately reduce its speed while maintaining sufficient driving force, thereby optimizing energy utilization and improving operating efficiency.

[0047] The output shafts of each gear set of the transmission are gathered into a total output shaft, which is called the output shaft of the transmission. After the transmission changes the speed of the power from the first motor M1, it transmits the power to the differential 14 through the output shaft. Then, the differential 14 distributes the power to the left and right half shafts 15, which then transmit the power to the left and right driving wheels, thereby driving the vehicle.

[0048] The main function of the differential 14 is to allow the two driving wheels of the vehicle to rotate at different speeds when turning. Specifically, when the vehicle turns, the rotation speeds of the inner and outer wheels will be different, and the outer wheel will rotate faster; if the two driving wheels are hard-connected together, one of the driving wheels will slip relative to the ground when the vehicle turns, making it difficult to turn, especially when driving at high speeds, which will seriously affect the stability of the vehicle; the differential 14, through its internal complex gear mechanism, allows the two driving wheels to rotate at different speeds, thereby avoiding this slip phenomenon.

[0049] The power generated by the second motor M2 is first transmitted to the single-speed reducer 23. The single-speed reducer 23 converts the high-speed rotation of the second motor M2 into a low-speed and high-torque power output. This converted power is then distributed to different paths according to the connection status of the first coupling element 21 and the second coupling element 22, see 1) to 3 below):

[0050] 1) When only the second coupling element 22 is in the connected state, the power output by the single-speed reducer 23 is exclusively transmitted to the power take-off. The power take-off, as a bridge for power transmission, further transmits the received power to the upper-mounted equipment to drive the upper-mounted equipment to work normally.

[0051] 2) When only the first coupling element 21 is in the connected state, the power output by the single-speed reducer 23 is exclusively transmitted to the differential 14 to provide driving force for the vehicle.

[0052] 3) When the second coupling element 22 and the first coupling element 21 are both in a connected state, the power output by the single-speed reducer 23 is received by the power take-off and the differential 14 at the same time, which means that the power generated by the second motor M2 can provide driving force for the upper equipment and the vehicle at the same time.

[0053] based on Figure 1 The system architecture of the electric drive axle of the new energy sanitation vehicle shown in the figure can flexibly switch the function of the second motor M2 by controlling the connection status of the first coupling element 21 and the second coupling element 22 - it can provide driving force for the upper equipment, and can also work together with the first motor M1 to provide a stronger driving force for the vehicle. This design allows the vehicle to achieve the power output required for vehicle driving by combining two smaller power motors (i.e., the first motor M1 and the second motor M2) without increasing the power of a single motor.

[0054] After the first motor M1 is designed as a low-power motor, it can maintain high-efficiency operation whether the vehicle is traveling at low speed or high speed. This is mainly due to the flexibility of the vehicle's operation strategy: when the vehicle is traveling at low speed, the first motor M1 can work alone or in conjunction with the second motor M2 at a lower power to meet the vehicle's power requirements while maintaining operation in a high-efficiency range; when the vehicle is traveling at high speed, although the power demand increases, the second motor M2 can be switched to drive together with the first motor M1 to share the load and avoid overloading the first motor M1, so that it can still maintain operation in a high-efficiency range. This design achieves efficient operation throughout the entire process through flexible coordination between the two motors, ensuring that the new energy sanitation vehicle has sufficient power while also having excellent economy.

[0055] Moreover, based on Figure 1 The electric drive axle of the new energy sanitation vehicle shown in the figure has a high degree of system integration. It adopts two small motors, which not only reduces the weight of the vehicle, but also reduces the cost compared with one large motor plus a small upper motor. At the same time, it reduces the battery pack capacity requirement by improving the motor efficiency, further reducing the vehicle weight and saving costs.

[0056] In addition, based on Figure 1 The system architecture of the electric drive axle of the new energy sanitation vehicle shown in the figure has another significant advantage, which is that it reduces the frequency of the power take-off being unable to meet the requirements of the upper system due to the influence of the vehicle's driving state, further improving the overall performance and reliability of the vehicle. The specific analysis is as follows:

[0057] In traditional new energy sanitation vehicles, the power take-off takes power from the power transmission chain of the drive motor used to drive the vehicle, and together with the power output of the upper motor, provides driving force for the upper equipment. This makes the combination conditions, working speed and working mode of the power take-off always related to the driving state of the vehicle, so it is difficult to achieve complete decoupling in practical applications. This means that during the driving process of the vehicle, the working state of the power take-off will always be restricted and affected by the driving state of the vehicle. This restriction may cause the power take-off to fail to meet the needs of the upper system under certain specific working conditions, thereby affecting the performance and efficiency of the entire system.

[0058] In the embodiment of the present application, when the first coupling element 21 is disconnected, the engagement condition, operating speed and operating mode of the power take-off are completely decoupled from the driving state of the vehicle, thereby reducing the frequency of the power take-off being unable to meet the requirements of the upper system due to being affected by the driving state of the vehicle.

[0059] In one possible implementation, see Figure 1In the embodiment of the present application, the first motor M1 and the second motor M2 are symmetrically arranged on both sides of the axle. This design can significantly reduce the overturning moment caused by motor offset and reduce the low-frequency vibration during vehicle driving. The specific analysis is as follows:

[0060] 1) Reduce the overturning moment caused by motor offset

[0061] The two motors are arranged symmetrically on both sides of the axle. This layout ensures that the center of mass of the axle system is basically located on the axis of the axle, thereby reducing the overturning moment caused by motor offset and improving the stability of the vehicle.

[0062] The axle is an important component that connects the suspension and the frame (or load-bearing body). Its structural form is a bridge structure with wheels installed at both ends. The center of mass is the point where the resultant force of gravity on an object acts, which is crucial to the stability of the vehicle. When the center of mass is located on the axis of the axle, the weight distribution on the left and right sides of the vehicle is more balanced, thereby reducing the overturning moment caused by uneven weight distribution.

[0063] Overturning moment is the moment that causes the vehicle to flip due to uneven weight distribution (such as motor offset) or external forces (such as uneven road surface, turning, etc.) during vehicle driving. When the overturning moment is too large, the vehicle may lose stability or even cause serious accidents such as rollover. The symmetrical arrangement of the two motors can significantly reduce the overturning moment, thereby improving the stability and safety of the vehicle.

[0064] 2) Reduce low-frequency vibration during vehicle driving

[0065] Low-frequency vibration is usually caused by the asymmetry of the vehicle structure, uneven road surface, or periodic excitation of power sources such as engines and motors. When the motor is offset, the vibration it generates may aggravate the low-frequency vibration of the vehicle, thereby affecting driving comfort. However, arranging the two motors symmetrically can make the mass distribution more uniform, effectively reduce the low-frequency vibration during vehicle driving, and improve driving comfort.

[0066] In summary, arranging the two motors symmetrically on both sides of the axle is of great significance to improving the overall vehicle performance.

[0067] In a possible implementation, the power take-off can be selected relative to the entire vehicle (such as Figure 1 Horizontally arranged (as shown) or vertically arranged (as shown) Figure 2 As shown; Figure 2 and Figure 1 The main difference lies in the different layout directions of the power take-offs).

[0068] Among them, the power take-off is arranged transversely relative to the whole vehicle, which means that the axis connecting the input and output shafts of the power take-off is parallel to the width direction of the vehicle. This arrangement is generally applicable to the situation where the power input shaft direction of the upper equipment is consistent with the width direction of the vehicle. For example, in some new energy sanitation vehicles, the power input shaft of the upper equipment is arranged transversely. The transverse arrangement of the power take-off can well transmit the power of the second motor M2 to the upper equipment, and it is more conducive to the overall layout of the vehicle in terms of space utilization, and will not occupy too much space in the front and rear directions of the vehicle, making the center of gravity distribution of the vehicle more reasonable.

[0069] The power take-off is arranged longitudinally relative to the vehicle, which means that the axis connecting the input and output shafts of the power take-off is parallel to the length of the vehicle. This method is usually used when the power input shaft direction of the upper equipment is consistent with the length direction of the vehicle. For example, in some sanitation vehicles, if the power input shaft of the upper equipment is longitudinal, the longitudinal arrangement of the power take-off can effectively transfer the power of the second motor M2 to the upper equipment, which is beneficial to the spatial layout and the distribution of the center of gravity of the vehicle. Moreover, during the power transmission process, the longitudinally arranged power take-off will have more stable power transmission for some long-axis upper equipment, and can better adapt to the vibration and impact of the vehicle during driving.

[0070] Based on any of the electric drive axles of new energy sanitation vehicles provided above, the present application embodiment also provides a method for controlling an electric drive axle of a new energy sanitation vehicle, such as Figure 3 As shown, the method includes:

[0071] Step S1: Determine the current operating condition of the vehicle;

[0072] When the vehicle is in a low-speed driving operation state and the first motor M1 has sufficient power, the process proceeds to step S2:

[0073] When the vehicle is in a low-speed driving operation state but the first motor M1 is insufficiently powered (for example, the vehicle needs to climb a slope while driving at a low speed), the process proceeds to step S3:

[0074] When the vehicle is in a high-speed driving state and the first motor M1 has sufficient power, the process proceeds to step S4:

[0075] When the vehicle is in a high-speed driving state and the first motor M1 is underpowered (for example, the vehicle needs to accelerate while driving at a high speed), the process goes to step S5.

[0076] Step S2: Control the shift element 13 to engage with the first gear gear set 11, and control the first coupling element 21 to be disconnected and the second coupling element 22 to be in a connected state, and the control of this round ends. In step S2, the first motor M1 is used as a drive motor to provide driving force for the vehicle, and the second motor M2 is used exclusively as a body motor to provide driving force for the body equipment.

[0077] Step S3: Control the shift element 13 to engage with the first gear set 11, and control the first coupling element 21 and the second coupling element 22 to be in a connected state, and the control of this round ends. In step S3, the second motor M2 is used as a top motor and also reused as a drive motor to supplement the power shortage of the first motor M1.

[0078] Step S4: Control the shift element 13 to engage with the second gear set 12, and control the first coupling element 21 and the second coupling element 22 to disconnect, and the control of this round ends. In step S4, the first motor M1 matches the second gear ratio of the transmission so that the first motor M1 operates in the high efficiency range, and the second motor M2 does not work.

[0079] Step S5: Control the shift element 13 to engage with the second gear gear set 12, and control the second coupling element 22 to disconnect and the first coupling element 21 to be in a connected state, and the control of this round ends. In step S5, the first motor M1 matches the second gear ratio of the transmission so that the first motor M1 operates in a high efficiency range, and the second motor M2 is connected to the differential 14 through the first coupling element 21 to provide auxiliary driving force.

[0080] In a possible implementation, the control method further includes: during the transmission shifting process (i.e., the shifting element 13 switches from being combined with the first gear gear set 11 to being combined with the second gear gear set 12, or the shifting element 13 switches from being combined with the second gear gear set 12 to being combined with the first gear gear set 11), keeping the first coupling element 21 in a connected state, so that the second motor M2 can be connected to the vehicle's power system through the first coupling element 21 to provide auxiliary driving force for the vehicle's driving, so that the second motor M2 can instantly provide the vehicle with necessary auxiliary driving force, effectively filling the power gap period that may be caused by the shifting operation. This measure not only ensures the continuity and uninterrupted power during the shifting, but also greatly improves the smoothness of the shifting process and the ride comfort, allowing the driver and passengers to enjoy a smoother and smoother shifting experience, further enhancing the overall handling performance and ride quality of the vehicle.

[0081] In addition, an embodiment of the present application further provides a vehicle controller, comprising at least one processor and a memory connected to the processor, wherein:

[0082] The memory is used to store computer programs;

[0083] The processor is used to execute the computer program so that the vehicle controller can implement any electric drive axle control method for a new energy sanitation vehicle as provided above.

[0084] An embodiment of the present application also provides a computer program product, including computer-readable instructions. When the computer-readable instructions are executed on a vehicle controller, the vehicle controller implements any of the electric drive axle control methods for new energy sanitation vehicles provided above.

[0085] In addition, the embodiment of the present application further provides a computer storage medium, wherein the storage medium carries one or more computer programs, and when the one or more computer programs are executed by the vehicle controller, the vehicle controller can be configured to perform any of the above-mentioned electric drive axle control methods for new energy sanitation vehicles.

[0086] Through the description of the above implementation methods, the technicians in the relevant field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs (Central Processing Units), special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structures used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation method in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, U disk, mobile hard disk, ROM (Read-Only Memory), RAM (Random Access Memory), disk or optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, training equipment, or network equipment, etc.) to execute the methods described in each embodiment of the present application.

[0087] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0088] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a training device, or a data center by wired (e.g., coaxial cable, optical fiber, DSL (Digital Subscriber Line, Digital Subscriber Line)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, training device, or data center. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., an SSD (Solid State Disk, Solid State Hard Drive)), etc.

[0089] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present application. Therefore, the embodiments of the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. An electric drive axle for a new energy sanitation vehicle, characterized in that: include: A transmission, a differential (14), a single-speed reducer (23), a power take-off, a first motor (M1), a second motor (M2), a first coupling element (21) and a second coupling element (22); The transmission comprises a first-gear gear set (11), a second-gear gear set (12) and a shift element (13); the output shaft of the first motor (M1) is switched between the first-gear gear set (11) and the input shaft of the second-gear gear set (12) through the shift element (13); The output shaft of the transmission is connected to the input end of the differential (14); The output shaft of the second motor (M2) is connected to the input shaft of the single-speed reducer (23); The output shaft of the single-speed reducer (23) is connected to the input end of the differential (14) via a first coupling element (21), and is connected to the input shaft of the power take-off via a second coupling element (22); the power take-off is used to transmit power from the second motor (M2) to the upper equipment.

2. The electric drive axle of the new energy sanitation vehicle according to claim 1, characterized in that: The first motor (M1) and the second motor (M2) are symmetrically arranged on both sides of the axle.

3. The electric drive axle of a new energy sanitation vehicle according to claim 1 or 2, characterized in that: The arrangement of the power take-off is as follows: The axis connecting the input and output shafts of the power take-off is parallel to the width direction of the new energy sanitation vehicle; or, the axis connecting the input and output shafts of the power take-off is parallel to the length direction of the new energy sanitation vehicle.

4. A method for controlling an electric drive axle of a new energy sanitation vehicle, characterized in that: The electric drive axle applied to the new energy sanitation vehicle according to any one of claims 1 to 3, the method comprising: Determine the current operating condition of the vehicle; When the vehicle is in a low-speed driving operation state and the first motor (M1) has sufficient power, the shift element (13) is controlled to be coupled with the first gear gear set (11), and the first coupling element (21) is controlled to be disconnected and the second coupling element (22) is in a connected state: When the vehicle is in a low-speed driving operation state but the power of the first motor (M1) is insufficient, the shift element (13) is controlled to be combined with the first gear gear set (11), and the first coupling element (21) and the second coupling element (22) are controlled to be in a connected state: When the vehicle is in a high-speed driving state and the first motor (M1) has sufficient power, the shift element (13) is controlled to be coupled with the second gear set (12), and the first coupling element (21) and the second coupling element (22) are controlled to be disconnected: When the vehicle is in a high-speed driving state and the first motor (M1) is insufficiently powered, the shift element (13) is controlled to be coupled with the second gear set (12), and the second coupling element (22) is controlled to be disconnected and the first coupling element (21) is in a connected state.

5. The electric drive axle control method of a new energy sanitation vehicle according to claim 4, characterized in that: The method further comprises: during the gear shifting process of the transmission, keeping the first coupling element (21) in a connected state.

6. A vehicle controller, characterized in that: The method comprises at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the vehicle controller can implement the electric drive axle control method of the new energy sanitation vehicle as described in claim 4 or 5.

7. A computer program product, characterized in that It includes computer-readable instructions. When the computer-readable instructions are executed on a vehicle controller, the vehicle controller implements the electric drive axle control method for a new energy sanitation vehicle as described in claim 4 or 5.

8. A computer storage medium, characterized in that The storage medium carries one or more computer programs, which, when executed by the vehicle controller, enable the vehicle controller to implement the electric drive axle control method for a new energy sanitation vehicle as described in claim 4 or 5.

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