Heavy truck steering energy supply system and heavy truck

Abstract

The utility model discloses a heavy truck steering energy supply system and a heavy truck, and the heavy truck steering energy supply system comprises an electric steering oil pump, a mode selection device and a control device, the mode selection device is used for determining a target oil pump working mode according to user operation, and the rotating speeds of the electric steering oil pump are different in different oil pump working modes; the control device is used for controlling the electric steering oil pump according to the target oil pump working mode and connected with the electric steering oil pump and the mode selection device. According to the system, dynamic adjustment of the rotating speed of the electric steering oil pump is achieved, the matching degree of steering energy supply of a vehicle under different working conditions is improved, therefore, the steering requirement is met, meanwhile, unnecessary electric energy consumption is reduced, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a heavy truck steering energy supply system and a heavy truck. Background Art

[0002] With the rapid development of new energy vehicles and intelligent driving technologies, electric steering oil pumps are increasingly widely used in heavy commercial vehicles. In existing new energy heavy commercial vehicles, the electric steering oil pump continuously operates at a constant high speed to ensure sufficient hydraulic assistance under various working conditions of the vehicle. However, this design easily causes the vehicle to still consume a large amount of electric energy when steering assistance is not required, especially when parking or driving at high speed. The continuous high-speed operation of the electric steering oil pump greatly reduces the energy utilization efficiency, increases the power consumption, and thus affects the cruising range of new energy heavy commercial vehicles. Summary of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a heavy truck steering energy supply system, which realizes dynamic adjustment of the rotational speed of the electric steering oil pump, improves the matching degree of steering energy supply under different working conditions of the vehicle, thereby reducing unnecessary electric energy consumption while meeting the steering requirements, and improving the energy utilization efficiency.

[0004] A second object of the utility model is to provide a heavy truck.

[0005] To achieve the above object, the heavy truck steering energy supply system according to the first aspect embodiment of the utility model includes: an electric steering oil pump; a mode selection device for determining a target oil pump working mode according to user operation, wherein the rotational speed of the electric steering oil pump is different under different oil pump working modes; a control device for controlling the electric steering oil pump according to the target oil pump working mode, and the control device is connected to the electric steering oil pump and the mode selection device.

[0006] According to the heavy truck steering energy supply system of the utility model embodiment, based on the setting that the rotational speed of the electric steering oil pump is different under different oil pump working modes, by using a mode selection device, the user can independently select a target oil pump working mode, and different target oil pump working modes correspond to different driving states. According to the target oil pump working mode, the control device can dynamically adjust the rotational speed of the electric steering oil pump, so that the electric steering oil pump can operate at the most suitable rotational speed under various working conditions, improving the matching degree of steering energy supply under different working conditions of the vehicle, thereby effectively reducing unnecessary electric energy consumption while meeting the steering requirements. This flexible rotational speed control mechanism improves the energy utilization efficiency of the system and extends the cruising range of the vehicle.

[0007] In some embodiments, the mode selection device is a touch selection unit.

[0008] In some embodiments, the touch selection unit includes: a first selection unit connected to the control device for selecting a debugging mode; and a second selection unit connected to the control device for selecting a non-debugging mode.

[0009] In some embodiments, the mode selection device is a mode selection mechanical button.

[0010] In some embodiments, when the mode selection mechanical button is in a first trigger state, the debugging mode is selected; when the mode selection mechanical button is in a second trigger state, the non-debugging mode is selected.

[0011] In some embodiments, the mode selection device is a voice control device or a gesture recognition device.

[0012] In some embodiments, the control device is further connected to the vehicle-mounted CAN bus to obtain a vehicle speed signal and a vehicle high-voltage signal in the non-debugging mode.

[0013] In some embodiments, the control device includes: a DCAC conversion device further connected to the electric power steering oil pump; and a controller connected to the mode selection device, the vehicle-mounted CAN bus, and the DCAC conversion device. The controller includes an electric power steering oil pump speed characteristic for storing corresponding to different vehicle speed signals and vehicle high-voltage signals, and is used to control the output of the DCAC conversion device according to the electric power steering oil pump speed characteristic.

[0014] In some embodiments, the electric power steering oil pump includes a permanent magnet synchronous motor and a gear pump, and the permanent magnet synchronous motor is connected to the DCAC conversion device and the gear pump.

[0015] To achieve the above object, a heavy truck according to a second aspect embodiment of the present invention includes a vehicle-mounted CAN bus, a hydraulic steering gear assembly, and the heavy truck steering energy supply system described in the above embodiments. The vehicle-mounted CAN bus is connected to the control device of the heavy truck steering energy supply system, and the hydraulic steering gear assembly is connected to the output end of the electric power steering oil pump of the heavy truck steering energy supply system.

[0016] According to the heavy truck of the embodiment of the present utility model, the in-vehicle CAN bus is connected to the control device of the heavy truck steering energy supply system, and the hydraulic steering gear assembly is connected to the output end of the electric steering oil pump of the heavy truck steering energy supply system. Such a configuration enables the in-vehicle CAN bus to transmit the real-time data and status information of the vehicle to the control device, enabling the control device to dynamically adjust the rotation speed of the electric steering oil pump according to the vehicle speed, driving mode, and other working conditions information, ensuring that the electric steering oil pump can provide hydraulic assistance to the hydraulic steering gear assembly at the most suitable rotation speed under different driving conditions, achieving precise control of the rotation speed of the electric steering oil pump. Through this flexible rotation speed control mechanism, while meeting the steering requirements, the system can effectively reduce unnecessary power consumption, thereby improving the energy utilization efficiency and extending the vehicle's cruising range.

[0017] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model. Brief Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a schematic diagram of a heavy truck steering energy supply system in the related art;

[0020] Figure 2 is a block diagram of a heavy truck steering energy supply system according to an embodiment of the present utility model;

[0021] Figure 3 is a block diagram of a heavy truck according to an embodiment of the present utility model.

[0022] Reference Signs:

[0023] Related Art:

[0024] Heavy truck steering energy supply system 1';

[0025] Electric steering oil pump 10';

[0026] Permanent magnet synchronous motor 11'; Gear pump 12'; DC-AC conversion device 31'; Hydraulic steering gear assembly 3'.

[0027] The Present Utility Model:

[0028] Heavy truck 100;

[0029] Heavy truck steering energy supply system 1; In-vehicle CAN bus 2; Hydraulic steering gear assembly 3;

[0030] Electric steering oil pump 10; Mode selection device 20; Control device 30;

[0031] Permanent magnet synchronous motor 11; gear pump 12; DC-AC conversion device 31; controller 32. Specific embodiments

[0032] The embodiments of the present invention will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention will be described in detail below.

[0033] Figure 1 is a schematic diagram of a heavy truck steering energy supply system in the related art. As Figure 1 shown, in the heavy truck steering energy supply system 1', after the vehicle is started in the ON gear (i.e., the vehicle is powered on with high voltage), the DC-AC conversion device 31' converts the direct current of the battery pack into alternating current and supplies it to the permanent magnet synchronous motor 11'. The permanent magnet synchronous motor 11' drives the gear pump 12' to output hydraulic energy to the hydraulic steering gear assembly 3' to achieve the hydraulic steering assist function.

[0034] Among them, after the vehicle is started in the ON gear, the electric steering oil pump 10' continuously operates in a constant high-speed rotation mode. This mode is the same as the principle of traditional diesel-powered heavy commercial vehicles, only replacing the mechanical energy input from the diesel engine to the gear pump through the gear train with the mechanical energy input from the motor to the gear pump through the gear train. It belongs to a simple conversion from diesel to electricity. This mode has the following two obvious deficiencies:

[0035] First, the hydraulic steering gear assembly 3' only works when the driver has a vehicle steering requirement. Obviously, when the vehicle is started and in the parking state, there is no steering requirement for the hydraulic steering gear (except for special situations such as vehicle debugging), but the electric steering oil pump 10' is continuously operating, consuming electricity continuously, and the useful work is 0.

[0036] Second, the hydraulic steering gear assembly 3' has different requirements for the output flow at different vehicle speeds and different loads, and requires the maximum flow when fully loaded and parked. The electric steering oil pump 10' is designed to run continuously at a high speed (1500 r / min) to meet the full working conditions of the vehicle. However, most of the working conditions after the vehicle is started are high-speed running. After test, the required speed is less than 500 r / min. Obviously, the useful work of the electric steering oil pump 10' is less than 1 / 3.

[0037] Therefore, the continuous high-speed rotation of the electric steering oil pump 10' greatly reduces the energy utilization efficiency, increases the power consumption, and thus affects the cruising range of new energy heavy commercial vehicles.

[0038] In view of the above problems, an embodiment of the present utility model provides a heavy truck steering energy supply system, which realizes the dynamic adjustment of the rotational speed of the electric steering oil pump, improves the matching degree of steering energy supply under different working conditions of the vehicle, thereby reducing unnecessary power consumption while meeting the steering requirements and improving the energy utilization efficiency.

[0039] The following refers to Figure 2 Describe the heavy truck steering energy supply system according to an embodiment of the present utility model.

[0040] Figure 2 is a block diagram of a heavy truck steering energy supply system according to an embodiment of the present utility model. As Figure 2 shown, the heavy truck steering energy supply system 1 includes: an electric steering oil pump 10, a mode selection device 20, and a control device 30.

[0041] In some embodiments, the electric steering oil pump 10 is used to provide the hydraulic power required for vehicle steering. Such a pump can be driven by an electric motor to convert mechanical energy into hydraulic energy and drive a hydraulic steering gear to help the driver easily turn the steering wheel under various driving conditions. Especially in heavy trucks, the assistance provided by the electric steering oil pump 10 can significantly reduce the difficulty of steering operation and improve driving comfort.

[0042] In some embodiments, the mode selection device 20 can be a user interface for determining a target oil pump operating mode according to user operations. Among them, the target oil pump operating mode is a preset mode in which the electric steering oil pump 10 operates under specific operating conditions. Each mode defines the rotational speed range of the electric steering oil pump 10, that is, the rotational speed of the electric steering oil pump 10 is different under different oil pump operating modes. Through this mode selection, the dynamic adjustment of the rotational speed of the electric steering oil pump 10 can be realized to meet the operating requirements under specific working modes.

[0043] In some embodiments, the control device 30 is an electronic module for managing and adjusting the operation of the electric steering oil pump 10. It can be used to control the rotational speed of the electric steering oil pump 10 according to the target oil pump operating mode. The control device 30 is connected to the electric steering oil pump 10 and the mode selection device 20.

[0044] Specifically, the driver selects the target oil pump operating mode through the mode selection device 20, and the mode selection device 20 transmits the selected operating mode signal to the control device 30. After receiving the signal, the control device 30 adjusts the rotational speed of the electric steering oil pump 10 according to a preset control algorithm. The electric steering oil pump 10 operates at a set rotational speed under the instruction of the control device 30 to provide corresponding hydraulic assistance. The control device 30 can real-time monitor the working state of the system and the running conditions of the vehicle, and dynamically adjust the operating mode of the electric steering oil pump 10 according to the feedback data to ensure the best performance and efficiency.

[0045] In some embodiments, the mode selection device 20 is a touch selection unit. The touch selection unit is a user interface based on touch screen technology, which can be a touch screen or a touch panel. The driver can directly use a finger or other touch tools to select different target oil pump working modes by directly touching the buttons or icons on the screen. The touch selection unit has the advantages of high flexibility, strong customizability, and friendly interface, and can more intuitively display different operation options and working modes.

[0046] In some embodiments, the touch selection unit includes: a first selection unit and a second selection unit. Among them, the first selection unit is communicatively connected to the control device 30 and is used to select the debugging mode. The second selection unit is communicatively connected to the control device 30 and is used to select the non-debugging mode.

[0047] In some embodiments, the debugging mode can be a working mode designed for special operations and tests during vehicle maintenance or development. In the debugging mode, the electric power steering oil pump 10 can run continuously at a specific fixed speed (such as the maximum rated speed of 1500 r / min) for various debugging, calibration, and system checks. The first selection unit allows the operator to enter the debugging mode to perform in-depth system debugging, parameter adjustment, and fault diagnosis. This mode is not used for daily driving but plays an important role during maintenance or development.

[0048] In some embodiments, the non-debugging mode is the normal operating mode of the vehicle and is used for daily driving operations. Through the second selection unit, the driver can select the normal operating mode of the vehicle to ensure that the electric power steering oil pump 10 works according to the actual driving needs. The speed of the electric power steering oil pump 10 can be dynamically adjusted according to conditions such as vehicle speed and steering demand to optimize energy consumption and enhance the driving experience.

[0049] In some embodiments, the non-debugging mode can include a zero vehicle speed mode, a low vehicle speed mode, a medium vehicle speed mode, a high vehicle speed mode, and an emergency steering mode, etc. The speeds of the electric power steering oil pump 10 corresponding to these modes can be calibrated through a large number of tests and confirmed in actual use to meet the requirements of the steering system under various working conditions.

[0050] In some embodiments, the mode selection device 20 can be a mode selection mechanical button. Among them, the mode selection mechanical button is a physical switch device. The user can select different target oil pump working modes by means of long pressing, short pressing, or the number of button presses, etc. The internal electrical connection of the button can generate corresponding electrical signals, and this signal is sent to the control device 30. After receiving the signal, the control device 30 adjusts the speed of the electric power steering oil pump 10 according to the preset mode logic.

[0051] In some embodiments, the mode selection mechanical button can be designed in a large size and easy-to-identify form, facilitating quick operation by the driver without having to look down. This is particularly important during driving, helping to reduce driver distraction and improve driving safety.

[0052] In some embodiments, when the mode selection mechanical button is in the first trigger state, the debugging mode is selected, and when the mode selection mechanical button is in the second trigger state, the non-debugging mode is selected. For example, the user can enter the first trigger state by pressing it once briefly and enter the second trigger state by pressing it twice briefly. Another example is that the user can enter the first trigger state by pressing it briefly and enter the second trigger state by pressing and holding it.

[0053] In some embodiments, the mode selection device 20 can also be a voice control device or a gesture recognition device. Among them, the voice control device is a device that controls the system through voice commands. The driver can select the working mode of the electric power steering oil pump 10 by issuing voice commands. This method can free the driver's hands, reduce distraction during driving, and thus improve safety. For example, the driver only needs to issue a pre-set password or voice command, such as "enter the debugging mode", and the voice control device will recognize the voice command and transmit the corresponding signal to the control device 30.

[0054] In some embodiments, the voice control device can include a microphone and a processing unit. The microphone is used to capture the driver's voice, and the processing unit recognizes and analyzes the voice signal, and then transmits the recognition result to the control device 30. The control device 30 adjusts the working mode of the electric power steering oil pump 10 according to the recognized result.

[0055] In some embodiments, the gesture recognition device is a device that selects the mode by capturing and recognizing the driver's hand movements. Through specific gestures, such as "waving" or "fisting", the driver can control the system to select different oil pump working modes. The gesture recognition device allows the driver to control the system through simple gestures during driving. This method is not only fast but also intuitive, especially suitable for situations where complex operations are inconvenient during driving.

[0056] In some embodiments, the gesture recognition device can include a camera and an image processing unit. Among them, the camera can capture the driver's hand movements in real time, and the image processing unit analyzes the gestures and recognizes the corresponding instructions. The recognized gesture instructions are transmitted to the control device 30, and the control device 30 adjusts the operating mode of the electric power steering oil pump 10 according to the instructions.

[0057] In some embodiments, the control device 30 is also connected to the in-vehicle CAN bus 2 to obtain the vehicle speed signal and the vehicle's high-voltage signal in non-debug mode. Based on these signals, the control device 30 can determine the current driving mode of the vehicle, including zero vehicle speed mode, low vehicle speed mode, medium vehicle speed mode, high vehicle speed mode, or emergency steering mode, and dynamically adjust the rotational speed of the electric power steering pump 10 for these modes.

[0058] Among them, the in-vehicle CAN bus 2 is a communication network inside the vehicle, which is widely used for data transmission between various electronic control units of the vehicle. By connecting to the in-vehicle CAN bus 2, the control device 30 can obtain the running information of the vehicle in real time and make corresponding control decisions based on this information.

[0059] In some embodiments, the vehicle speed signal is obtained from a vehicle speed sensor and reflects the current driving speed of the vehicle. In non-debug mode, after the control device 30 obtains the vehicle speed signal through the in-vehicle CAN bus 2, it can automatically adjust the rotational speed of the electric power steering pump 10 to meet the steering requirements at different speeds. For example, when driving at low speed, the steering assistance requirement is relatively large, and the electric power steering pump 10 can operate at a higher rotational speed. While when driving at high speed, the steering assistance requirement decreases, and the electric power steering pump 10 can reduce its rotational speed, thereby reducing energy consumption.

[0060] In some embodiments, the vehicle's high-voltage signal can be the state of the main battery voltage in the electric system. By obtaining this signal through the in-vehicle CAN bus 2, the control device 30 can monitor the state of the vehicle power system and optimize the operation of the electric power steering pump 10 accordingly. For example, when there is a high-voltage fault in the vehicle (such as loss of high voltage, etc., which affects the vehicle's driving function), the electric power steering pump 10 can operate at its maximum rated rotational speed (1500 r / min). In this state, in order to ensure that sufficient steering assistance can still be provided even in the case of partial electrical system failures, the electric power steering pump 10 will return to full-load operation, consuming 100% of the electrical energy. This is to ensure that the driver can still safely control the vehicle in an emergency.

[0061] As Figure 2 shown, the control device 30 includes: a DC-AC conversion device 31 and a controller 32. Among them, the DC-AC conversion device 31 is a device that converts direct current (DC) into alternating current (AC). The DC-AC conversion device 31 is connected to the electric power steering pump 10 and is responsible for providing an appropriate AC power supply to drive the electric power steering pump 10. The output voltage and frequency of the DC-AC conversion device 31 can be dynamically adjusted according to the instructions of the controller 32. By adjusting the parameters of the output alternating current, the system can flexibly control the rotational speed of the electric power steering pump 10 to meet the requirements in different driving modes.

[0062] In some embodiments, the controller 32 is connected to the mode selection device 20, the vehicle-mounted CAN bus 2, and the DC-AC conversion device 31. The controller 32 includes a rotational speed characteristic of the electric power steering oil pump 10 corresponding to different vehicle speed signals and the vehicle's high-voltage signal, and is used to control the output of the DC-AC conversion device 31 according to the rotational speed characteristic of the electric power steering oil pump 10, so as to achieve precise control of the rotational speed of the electric power steering oil pump 10.

[0063] In some embodiments, the rotational speed characteristic of the electric power steering oil pump 10 is specifically manifested as follows: When the vehicle is in the zero vehicle speed mode, that is, when the vehicle is started (in the ON gear) and the vehicle speed is 0, the electric power steering oil pump 10 will not start. If the vehicle speed drops from greater than 0 to 0 and this state lasts for no less than 5 seconds, the electric power steering oil pump 10 will stop working. This mechanism is to prevent the frequent start and stop of the oil pump during short stops and avoid unnecessary energy consumption. In this state, since the electric power steering oil pump 10 is not working, the system will not consume any energy, achieving the effect of zero energy consumption.

[0064] When the vehicle is in the low vehicle speed mode, that is, 0 km / h < vehicle speed < 30 km / h and the vehicle's high-voltage electricity is working properly, the electric power steering oil pump 10 can continuously operate at a set rated rotational speed (1500 r / min). In this case, the electric power steering oil pump 10 is in a full-load operation state, so it will consume 100% of the electric energy. This is to ensure that sufficient hydraulic assistance can be provided during low-speed driving to cope with the possibly more frequent steering requirements.

[0065] When the vehicle is in the medium vehicle speed mode, that is, 30 km / h ≤ vehicle speed < 60 km / h and the vehicle's high-voltage electricity is working properly, the electric power steering oil pump 10 can continuously operate at a set rated rotational speed (1000 r / min). In this case, the steering assistance required by the vehicle decreases, so the rotational speed of the electric power steering oil pump 10 is also reduced to (1000 r / min), and the power consumption of the electric power steering oil pump 10 is reduced to 2 / 3 of the original.

[0066] When the vehicle is in the high vehicle speed mode, that is, vehicle speed ≥ 60 km / h and the vehicle's high-voltage electricity is working properly, the electric power steering oil pump 10 can continuously operate at a set rated rotational speed (500 r / min). When driving at high speed, the steering requirement of the vehicle is lower, so the rotational speed of the electric power steering oil pump 10 is further reduced to 500 r / min, and its power consumption is reduced to 1 / 3 of the original, thus significantly reducing energy consumption.

[0067] When the vehicle is in the emergency steering mode, that is, the vehicle speed ≥ 5 km / h and there is a high-voltage fault in the whole vehicle (such as loss of high voltage, etc., a high-voltage fault that affects the vehicle driving function), the electric power steering pump 10 will operate at the maximum rated speed (1500 r / min). In this state, in order to ensure that sufficient steering assistance can still be provided even in the case of partial failure of the electrical system, the electric power steering pump 10 will return to the full-load operation state and consume 100% of the electric energy. This is to ensure that the driver can still safely control the vehicle in an emergency.

[0068] As Figure 2 shown, the electric power steering pump 10 includes a permanent magnet synchronous motor 11 and a gear pump 12. Among them, the permanent magnet synchronous motor 11 (Permanent Magnet Synchronous Motor, PMSM) is a highly efficient AC motor, and permanent magnets are embedded on its rotor and rotate synchronously with the rotating magnetic field generated by the stator. This kind of motor is widely used in the automotive steering system due to its high power density, high efficiency and good control characteristics.

[0069] In some embodiments, the permanent magnet synchronous motor 11 is connected to the DC-AC conversion device 31 and is driven by the AC power supply provided by the DC-AC conversion device 31. The DC-AC conversion device 31 is not only responsible for converting the DC power supply of the vehicle into the AC power required by the permanent magnet synchronous motor 11, but also can precisely control the rotation speed of the permanent magnet synchronous motor 11 by adjusting the output voltage and frequency. This control method can ensure that the permanent magnet synchronous motor 11 provides appropriate steering assistance according to different driving conditions and requirements.

[0070] In some embodiments, the gear pump 12 is a commonly used type of hydraulic pump, and it pushes the liquid flow by the rotation of a pair of gears. It has the advantages of simple structure, strong durability and stable flow rate, and is suitable for various hydraulic systems.

[0071] In some embodiments, the permanent magnet synchronous motor 11 is connected to the gear pump 12. When the controller 32 sends a driving signal to the permanent magnet synchronous motor 11 through the DC-AC conversion device 31, the motor can rotate and drive the gear pump 12 to operate. By controlling the rotation speed of the permanent magnet synchronous motor 11, the gear pump 12 is further driven to output different flow rates to the hydraulic steering gear to meet the requirements of steering assistance.

[0072] Next, refer to Figure 3 to describe the heavy truck according to the embodiment of the present invention.

[0073] Figure 3 is a block diagram of a heavy truck according to an embodiment of the present invention. As Figure 3 shown, the heavy truck 100 includes an in-vehicle CAN bus 2, a hydraulic steering gear assembly 3, and the heavy truck steering energy supply system 1 described in the above embodiments.

[0074] In some embodiments, the hydraulic steering gear assembly 3 is an important part of the heavy truck steering system. Driven by the pressure of hydraulic oil, it realizes the control of wheel steering. The hydraulic steering gear assembly 3 may include components such as a steering column, a steering valve, and a hydraulic cylinder, which is particularly important in large vehicles such as the heavy truck 100.

[0075] In some embodiments, the in-vehicle CAN bus 2 is connected to the control device 30 of the heavy truck steering energy supply system 1. The control device 30 receives the vehicle operation data in real time through the in-vehicle CAN bus 2, such as vehicle speed signals and vehicle high-voltage signals. These data are used to adjust the rotation speed of the electric steering oil pump 10 to adapt to different driving requirements.

[0076] In some embodiments, the hydraulic steering gear assembly 3 is connected to the output end of the electric steering oil pump 10 of the heavy truck steering energy supply system 1. When the control device 30 instructs the electric steering oil pump 10 to start, the hydraulic oil generated by the oil pump is delivered to the hydraulic steering gear, enabling the hydraulic steering gear to provide the required steering assistance. This connection ensures the stable supply and precise control of the hydraulic oil to meet the steering requirements of the heavy truck 100 under various working conditions.

[0077] For the heavy truck 100 according to the embodiments of the present invention, the in-vehicle CAN bus 2 is connected to the control device 30 of the heavy truck steering energy supply system 1, and the hydraulic steering gear assembly 3 is connected to the output end of the electric steering oil pump 10 of the heavy truck steering energy supply system 1. Such a configuration enables the in-vehicle CAN bus 2 to transmit the real-time data and status information of the vehicle to the control device 30, enabling the control device 30 to dynamically adjust the rotation speed of the electric steering oil pump 10 according to the vehicle speed, driving mode, and other working condition information, ensuring that the electric steering oil pump 10 can provide hydraulic assistance to the hydraulic steering gear assembly 3 at the most suitable rotation speed under different driving conditions, achieving precise control of the rotation speed of the electric steering oil pump 10. Through this flexible rotation speed control mechanism, while meeting the steering requirements, the system can effectively reduce unnecessary power consumption, thereby improving the energy utilization efficiency and extending the vehicle's cruising range.

[0078] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0079] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A heavy truck steering energy supply system, characterized in that: include: Electric power steering oil pump; A mode selection device, used to determine a target oil pump operating mode according to a user operation, wherein the rotation speed of the electric steering oil pump is different in different oil pump operating modes; A control device for controlling the electric steering oil pump according to the target oil pump operating mode, wherein the control device is connected to the electric steering oil pump and the mode selection device.

2. The heavy truck steering energy supply system according to claim 1, characterized in that: The mode selection device is a touch selection unit.

3. The heavy truck steering energy supply system according to claim 2, characterized in that: The touch selection unit comprises: A first selection unit, connected to the control device and used to select a debugging mode; A second selection unit, the second selection unit is connected to the control device and is used to select a non-debugging mode.

4. The heavy truck steering energy supply system according to claim 1, characterized in that: The mode selection device is a mode selection mechanical button.

5. The heavy truck steering energy supply system according to claim 4, characterized in that: When the mode selection mechanical key is in a first trigger state, the debugging mode is selected; when the mode selection mechanical key is in a second trigger state, the non-debugging mode is selected.

6. The heavy truck steering energy supply system according to claim 1, characterized in that: The mode selection device is a voice control device or a gesture recognition device.

7. The heavy truck steering energy supply system according to claim 3 or 5, characterized in that: The control device is also connected to the vehicle-mounted CAN bus to obtain a vehicle speed signal and a vehicle high voltage signal in the non-debugging mode.

8. The heavy truck steering energy supply system according to claim 7, characterized in that: The control device comprises: A DCAC conversion device, the DCAC conversion device is also connected to the electric steering oil pump; A controller is connected to the mode selection device, the vehicle-mounted CAN bus, and the DCAC conversion device. The controller includes a device for storing electric steering oil pump speed characteristics corresponding to different vehicle speed signals and the whole vehicle high-voltage signals, and is used to control the output of the DCAC conversion device according to the electric steering oil pump speed characteristics.

9. The heavy truck steering energy supply system according to claim 8, characterized in that: The electric steering oil pump comprises a permanent magnet synchronous motor and a gear pump, and the permanent magnet synchronous motor is connected to the DCAC conversion device and the gear pump.

10. A heavy truck, characterized in that: It comprises a vehicle-mounted CAN bus, a hydraulic steering gear assembly and a heavy-duty truck steering energy supply system as described in any one of claims 1 to 9, wherein the vehicle-mounted CAN bus is connected to a control device of the heavy-duty truck steering energy supply system, and the hydraulic steering gear assembly is connected to an output end of an electric steering oil pump of the heavy-duty truck steering energy supply system.

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