A new energy tractor range extender series hybrid configuration

Abstract

The utility model discloses a new energy tractor range extender series hybrid power configuration, including first motor, engine, first clutch, power output shaft PTO, second clutch, second motor, the gearbox of connecting on second motor, the rear axle main reduction wheel system of connecting on gearbox, the first wheel edge planetary reduction wheel system and the second wheel edge planetary reduction wheel system of connecting in rear axle main reduction wheel system, power battery, motor controller between power battery with first motor, second motor is connected, the driving state data acquisition unit, the domain controller XCU, first clutch second clutch motor controller first motor second motor engine driving state data acquisition unit and power battery all signal connection in the domain controller XCU. This scheme adopts double motor and double clutch structure, can realize the different demand of multi -mode operation, can improve tractor's power performance as a whole, supports the big torque output scene.

Description

Technical Field

[0001] This utility model relates to the field of tractor drive structure technology, and in particular to a range-extended series hybrid power configuration for a new energy tractor. Background Technology

[0002] With the acceleration of urbanization in my country, a large number of rural laborers have been transferred to other areas, making it imperative to develop intelligent and large-scale production models based on modern agricultural machinery. At the same time, energy shortages and severe environmental pollution have led to an increasingly urgent demand for green power agricultural machinery and equipment with low / zero emissions, little / no pollution, and low noise in modern agricultural production.

[0003] As the most important agricultural power machinery, agricultural tractors are responsible for a variety of operations, including towing, suspending and driving various supporting agricultural implements, and completing a variety of farmland operations, garden operations, transportation operations and fixed site operations such as plowing, harrowing, sowing, harvesting, inter-cultivation, irrigation, fertilizing, spraying, and weeding. The operating environment is complex, the types of operations are numerous, and the workload is variable.

[0004] Currently, wheeled tractors mostly employ mechanical or power shifting gears, which are characterized by multiple gears, difficult operation, low work efficiency, and high operator skill. Furthermore, the randomness of ground resistance during operation leads users to utilize higher gear ratios to ensure power, but this results in poor fuel economy. Under complex working conditions, problems such as high fuel consumption, high emissions, poor matching between power output and load demand, low work efficiency, and high operational intensity are prevalent, necessitating innovation in power systems to achieve energy conservation, emission reduction, and performance improvement. Hybrid power systems, with their advantages of low operating costs, fast power response, mature industry chain, and convenient operation, have become an important direction for replacing traditional mechanical power. The introduction of new energy technologies is key to solving these problems, but current technologies still have certain shortcomings.

[0005] Series hybrid power systems use an engine connected to a generator for power supply, decoupling the power source from the main drive wheels. This allows the engine to operate in a high-efficiency range, reducing fuel consumption. However, it is difficult to support special operations with high torque output and has poor adaptability to special working conditions such as special rescues. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of existing new energy tractors that do not support high torque output scenarios, and to provide a range-extended series hybrid power configuration for new energy tractors.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] This utility model provides a range-extended series hybrid power configuration for a new energy tractor, including a first motor, an engine for driving the first motor, a first clutch, a power output shaft (PTO) connected to the first motor via the first clutch, a second clutch, a second motor connected to the first motor via the second clutch and gears, a gearbox connected to the second motor, a rear axle main reduction gear system connected to the gearbox, a first wheel-side planetary reduction gear system and a second wheel-side planetary reduction gear system connected to the rear axle main reduction gear system, a power battery, a motor controller connected between the power battery and the first motor and the second motor, a driving status data acquisition unit, and a domain controller (XCU).

[0009] The first clutch, the second clutch, the motor controller, the first motor, the second motor, the engine, the driving status data acquisition unit, and the power battery are all signal-connected to the domain controller XCU.

[0010] This utility model has the following advantages:

[0011] This solution adopts a dual-motor and dual-clutch structure, which can meet the different needs of multi-mode operation, improve the overall power performance of the tractor, and support high torque output scenarios. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0017] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1As shown, this utility model discloses a range-extended series hybrid powertrain configuration for a new energy tractor, including a first motor 2, an engine 1, a first clutch 4, a power output shaft PTO 9, a second clutch 3, a second motor 6, a gearbox 7, a rear axle main reduction gear system 10, a first wheel-side planetary reduction gear system 8, a second wheel-side planetary reduction gear system 11, a power battery 14, a motor controller, a driving status data acquisition unit, and a domain controller XCU. The engine is connected to the first motor to drive it; the power output shaft PTO is connected to the first motor via the first clutch; the second motor is connected to the first motor via the second clutch and gears; the gearbox is connected to the second motor; the rear axle main reduction gear system is connected to the gearbox; both the first and second wheel-side planetary reduction gear systems are connected to the rear axle main reduction gear system; the motor controller is connected between the power battery and the first and second motors. The first clutch, the second clutch, the motor controller, the first motor, the second motor, the engine, the driving status data acquisition unit, and the power battery are all signal-connected to the domain controller XCU. It should be noted that the first clutch, the second clutch, the motor controller, the first motor, the second motor, the engine, the vehicle status data acquisition unit, and the power battery are all signal-connected to the domain controller XCU, and are not in [the specified location]. Figure 1 This is reflected in the text.

[0021] The preferred transmission is a two-speed transmission.

[0022] The motor controller includes a first motor controller 12 connected between the power battery and the first motor, and a second motor controller 13 connected between the power battery and the second motor.

[0023] The driving status data acquisition unit includes a speed sensor for collecting vehicle speed information, a gear sensor for collecting gearbox gear status signals, and a button for controlling the tractor to enter cruise control mode.

[0024] The above-mentioned new energy tractor with range-extended series hybrid power configuration can meet the different needs of multi-mode operation, including parking charging mode, pure electric operation mode, low-speed range-extended rotary tillage mode, low-speed ultra-high load series mode, medium-speed range-extended plowing mode, high-speed range-extended transport mode, parking PTO operation mode, and supports high torque output scenarios.

[0025] Specifically, parking charging mode:

[0026] When a tractor is left idle for an extended period during winter, the state of charge (SOC) of the power battery will drop significantly. After the engine is started, the domain controller (XCU) will use the current SOC signal to put the entire vehicle into parking charging mode until a certain SOC value is met, at which point it will disengage. At this point, both the first and second clutches will be fully disengaged.

[0027] The pure electric operation mode:

[0028] When the tractor is maneuvering, at low speed and low load, the domain controller (XCU) will, based on the current State of Charge (SOC) signal and the driver's intention, put the vehicle into pure electric mode. In this mode, the engine does not start, and the vehicle speed and load are below a certain calibrated value. At this time, both the first and second clutches are disengaged.

[0029] The low-speed extended-range rotary tillage mode:

[0030] When the vehicle is performing low-speed rotary tillage, the domain controller (XCU) uses the cruise control button (driver's intention), vehicle speed signal, and battery SOC status signal to perform closed-loop control of engine power output and vehicle speed. Due to varying soil resistance, vehicle speed and power will change. Excess power will charge the battery, and insufficient power will be supplemented by the battery. At this time, the battery pack plays a role in peak shaving and valley filling. During this period, the first clutch is engaged and the second clutch is disengaged. The transmission is in first gear.

[0031] Low-speed, ultra-high load series connection mode:

[0032] When rescuing vehicles in mud or on steep slopes, a significant amount of torque is required to propel them. The domain controller (XCU) activates this mode based on the driver's intentions or the rescue situation. The engine, first motor, and second motor simultaneously output torque to the vehicle, providing three times the power of a single motor. At this time, the first clutch disengages and the second clutch engages. The transmission is in first gear.

[0033] Medium-speed extended-range plowing mode:

[0034] When the vehicle is performing medium-speed rotary tillage, the domain controller (XCU) uses the cruise control button, vehicle speed signal, and battery SOC status signal to perform closed-loop control of engine power output and vehicle speed. Due to varying soil resistance, vehicle speed and power will change. Excess power will charge the battery, and insufficient power will be supplemented by the battery. At this time, the battery pack plays a role in peak shaving and valley filling. During this period, the first clutch and the second clutch are disengaged. The transmission is in first gear.

[0035] High-speed range-extended transportation mode:

[0036] When the vehicle is engaged in transportation operations or driving empty, the domain controller (XCU) performs closed-loop control of engine power output and vehicle speed based on the cruise control button, vehicle speed signal, and battery SOC status signal. Due to varying soil resistance, vehicle speed and power will change. Excess power will charge the battery, and insufficient power will be supplemented by the battery. At this time, the battery pack plays a role in peak shaving and valley filling. During this period, the first clutch is disengaged, and the second clutch is disengaged. The transmission is in second gear.

[0037] Parking PTO operation mode:

[0038] When the vehicle is engaged in operations such as pumping water, the engine directly drives the PTO for operation. The domain controller XCU controls motors 1 and 2 to remain inactive based on driver operation signals and the battery pack's SOC signal status. At this time, the first clutch is engaged and the second clutch is disengaged.

[0039] The above-mentioned new energy tractor range-extended series hybrid power configuration can meet the requirements of low-speed, high-torque operating conditions.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A new energy tractor with a range-extended series hybrid powertrain configuration, characterized in that, The system includes a first motor, an engine for driving the first motor, a first clutch, a power output shaft (PTO) connected to the first motor via the first clutch, a second clutch, a second motor connected to the first motor via the second clutch and gears, a gearbox connected to the second motor, a rear axle main reduction gear system connected to the gearbox, a first wheel-side planetary reduction gear system and a second wheel-side planetary reduction gear system connected to the rear axle main reduction gear system, a power battery, a motor controller connected between the power battery and the first motor and the second motor, a vehicle status data acquisition unit, and a domain controller (XCU). The first clutch, the second clutch, the motor controller, the first motor, the second motor, the engine, the driving status data acquisition unit, and the power battery are all signal-connected to the domain controller XCU.

2. The new energy tractor range-extended series hybrid power configuration according to claim 1, characterized in that: The gearbox is a two-speed gearbox.

3. The new energy tractor range-extended series hybrid power configuration according to claim 1, characterized in that: The motor controller includes a first motor controller connected between the power battery and the first motor, and a second motor controller connected between the power battery and the second motor.

4. The new energy tractor range-extended series hybrid power configuration according to claim 1, characterized in that: The driving status data acquisition unit includes a speed sensor for acquiring vehicle speed information, a gear sensor for acquiring gearbox gear status signals, and a button for controlling the tractor to enter cruise control mode.

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