Hydrodynamic retarder system and method and vehicle with hydrodynamic retarder system

Abstract

The invention provides a hydraulic retarder system and method and a vehicle with the hydraulic retarder system. The hydrodynamic retarder system comprises a hydrodynamic retarder, a hydraulic control system and a control system, wherein the hydrodynamic retarder is provided with a retarder working cavity; a third oil inlet of the oil guide device is communicated with a second oil outlet of the retarder working cavity, and a third oil outlet of the oil guide device is communicated with a second oil inlet of the retarder working cavity; a fourth oil inlet of the heat energy conversion device is communicated with a fifth oil outlet of the oil liquid guide device, a fourth oil outlet of the heat energy conversion device is communicated with a fifth oil inlet of the oil liquid guide device, and the heat energy conversion device is electrically connected with external equipment. And the heat energy conversion device is used for converting heat energy generated by the hot oil into electric energy for external equipment to use. The energy utilization efficiency of the system is improved, remarkable economic and environmental benefits are brought, and the problem that in the prior art, the braking torque gear of the hydraulic retarder is difficult to meet the requirements under different working conditions is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary braking, and in particular, to a hydraulic retarder system, a method, and a vehicle having the same. Background Art

[0002] As an important auxiliary braking system in modern commercial vehicles, a hydraulic retarder works by generating braking torque through hydraulic work, effectively controlling the speed of the vehicle when going downhill. Especially on mountain roads with continuous downhill slopes, it can significantly reduce the burden on the main braking system and improve driving safety. However, during the braking process of a traditional hydraulic retarder, a large amount of heat energy is generated due to the strong friction between the high-speed rotating rotor and the oil. These heat energies are usually dissipated to the environment through natural heat dissipation or a dedicated heat exchanger transferring to the cooling system, without being effectively utilized, resulting in serious waste of energy.

[0003] In view of the above problems, no effective solution has been proposed yet. Summary of the Invention

[0004] The main object of the present invention is to provide a hydraulic retarder system, a method, and a vehicle having the same, so as to solve the problem that a large amount of heat energy generated by a traditional hydraulic retarder in the prior art is not effectively utilized.

[0005] To achieve the above object, according to one aspect of the present invention, a hydraulic retarder system is provided, including: a hydraulic retarder, which is provided with a retarder working chamber; an oil guiding device, the third oil inlet of the oil guiding device is communicated with the second oil outlet of the retarder working chamber, and the third oil outlet of the oil guiding device is communicated with the second oil inlet of the retarder working chamber; a heat energy conversion device, the fourth oil inlet of the heat energy conversion device is communicated with the fifth oil outlet of the oil guiding device, the fourth oil outlet of the heat energy conversion device is communicated with the fifth oil inlet of the oil guiding device, the heat energy conversion device is electrically connected to an external device, and the heat energy conversion device is used to convert the heat energy generated by the hot oil into electric energy for the use of the external device.

[0006] Furthermore, the hydraulic retarder system further includes: a pump oil assembly, the first oil outlet of the pump oil assembly is communicated with the second oil inlet, and the pump oil assembly is used to input oil into the retarder working chamber.

[0007] Furthermore, the pump oil assembly includes: an oil sump; an oil pump, the first oil inlet of the oil pump is communicated with the oil sump, the first oil outlet of the oil pump is communicated with the second oil inlet; a motor, the main shaft of the motor is connected to the drive input end of the oil pump, and the motor is used to drive the oil pump to be in a working state; wherein, the oil pump is used to input the oil in the oil sump into the retarder working chamber.

[0008] Further, the hydraulic retarder system further includes: an oil temperature sensor, which is arranged on the connecting pipeline between the third oil outlet and the second oil inlet, and the oil temperature sensor is used for periodically detecting the oil temperature data.

[0009] Further, the hydraulic retarder system further includes: a first temperature sensor, which is arranged at the fourth oil inlet, and the first temperature sensor is used for periodically detecting the oil inlet temperature data before the oil enters the heat energy conversion device; a second temperature sensor, which is arranged at the fourth oil outlet, and the second temperature sensor is used for periodically detecting the oil outlet temperature data after the oil enters the heat energy conversion device.

[0010] Further, the hydraulic retarder system further includes: a second hydraulic valve, through which the oil pumping assembly is communicated with the oil pumping assembly; and / or; an oil pressure sensor, which is arranged on the connecting pipeline between the second hydraulic valve and the second oil inlet, and the oil pressure sensor is used for periodically detecting the oil pressure data; and / or; a safety valve, which is arranged on the connecting pipeline between the oil pumping assembly and the second hydraulic valve; and / or; a filter, through which the oil pumping assembly is communicated with the oil sump; and / or; a one-way regulating valve, which is arranged on the connecting pipeline between the filter and the oil sump; and / or; a first hydraulic valve, through which the second oil outlet is communicated with the oil sump.

[0011] According to another aspect of the embodiments of the present application, there is also provided a control method for a hydraulic retarder system, which is used to control the above-mentioned hydraulic retarder system, and the control method includes the following steps: in response to the motor being in the first target working state signal, obtaining the oil temperature data; based on the oil temperature data, determining the first target working mode; based on the first target working mode, generating a first control instruction set, and the first control instruction set is used to control the heat energy conversion device to be in the first target working state.

[0012] Further, determining the first target working mode based on the oil temperature data includes: judging the oil temperature data based on the first oil temperature threshold to obtain a first judgment result, where the first oil temperature threshold is C and the oil temperature data is B; in response to the first judgment result being C > B, determining the first target working mode as the waiting mode; in response to the first judgment result being C ≤ B, obtaining the oil inlet temperature data and the oil outlet temperature data; based on the oil inlet temperature data and the oil outlet temperature data, determining the oil temperature difference data; judging the oil temperature difference data based on the oil temperature difference threshold data to obtain a second judgment result, where the oil temperature difference threshold data is D and the oil temperature difference data is E; in response to the second judgment result being D > E, determining the first target working mode as the waiting mode; in response to the second judgment result being D ≤ E, determining the first target working mode as the heat energy conversion mode.

[0013] Further, in response to the motor being before the first target operating state signal, it includes: in response to the braking torque request data, generating a second control instruction set for controlling the motor to be in the starting operating state; in response to the motor being in the starting operating state signal, acquiring the oil pressure data; based on the oil pressure data, determining the second target operating mode; and based on the second target operating mode, generating a third control instruction set for controlling the motor to be in the first target operating state.

[0014] According to another aspect of the embodiments of the present application, there is also provided a vehicle including a hydrodynamic retarder system, and the hydrodynamic retarder system is the above-mentioned hydrodynamic retarder system.

[0015] Applying the technical solution of the present invention, by introducing an oil guiding device and a heat energy conversion device, the oil guiding device is connected to the retarder inlet and outlet to ensure the oil circulation and maintain the oil circulation in the working chamber of the retarder. The heat energy conversion device is electrically connected to external devices to convert heat energy into electrical energy and directly supply power to these external devices, achieving efficient conversion of heat energy to electrical energy. This not only improves the energy utilization efficiency of the system but also brings significant economic and environmental benefits, and solves the problem that the braking torque gears of the existing hydrodynamic retarder are difficult to adapt to the requirements under different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 Shows a structural block diagram of a first embodiment of a hydrodynamic retarder system according to the present invention;

[0018] Figure 2 Shows a flowchart of a control method for a hydrodynamic retarder system according to the present invention;

[0019] Figure 3 Shows a structural block diagram of a control device for a hydrodynamic retarder system according to the present invention.

[0020] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0021] 1, oil sump;

[0022] 2, one-way regulating valve;

[0023] 3, rotor;

[0024] 4, first hydraulic valve;

[0025] 5, second outlet;

[0026] 6. Retarder working chamber;

[0027] 7. Second oil inlet;

[0028] 8. Oil guiding device;

[0029] 9. Oil temperature sensor;

[0030] 10. Oil pressure sensor;

[0031] 11. Second hydraulic valve;

[0032] 12. Safety valve;

[0033] 13. First temperature sensor;

[0034] 14. Heat energy conversion device;

[0035] 15. Second temperature sensor;

[0036] 16. External battery;

[0037] 17. Motor;

[0038] 18. Oil pump;

[0039] 19. Filter. Detailed implementation manners

[0040] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0041] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "comprise" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0043] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0044] A hydraulic retarder is an indispensable auxiliary braking system in modern commercial vehicles, especially trucks and buses. Its design and operating principle revolve around generating braking torque by hydraulic work. This technology shows great value when the vehicle is driving downhill, especially on continuous mountain roads. It can precisely control the vehicle speed, reduce the load on the conventional braking system, and avoid the problem of overheating and failure of brake pads caused by long-term use of conventional brakes, thus significantly improving driving safety and comfort.

[0045] The core components of a hydraulic retarder include a rotor 3 (usually called a turbine or drum) located on the vehicle's transmission shaft and a stationary guide wheel (sometimes called a stator). When the driver activates the hydraulic retarder, the power of the engine is transmitted to the oil pump through the transmission system. The oil pump pressurizes the oil in the oil sump and pumps it into the working chamber of the retarder formed between the rotor 3 and the guide wheel. In the working chamber, the oil is thrown out by the high-speed rotating rotor, hits the surface of the stationary guide wheel and rebounds circumferentially along the guide wheel. Through the repeated impact and circulation of the oil, a hydraulic vortex effect is formed. The hydraulic work in this process is converted into braking torque, effectively suppressing the vehicle speed when driving downhill, thus realizing the auxiliary braking function.

[0046] During the braking process of a hydrodynamic retarder, a large amount of friction is generated by the interaction between the high-speed rotating rotor 3 and the oil, which is then converted into heat energy. These heats rapidly increase the temperature of the oil. If not controlled, it may lead to a decrease in the viscosity of the oil, a decline in lubrication performance, and even affect the stability and lifespan of the retarder. Therefore, the hydrodynamic retarder system is usually equipped with a heat exchanger to quickly transfer the heat in the hot oil to the coolant, and dissipate the heat through the engine cooling system or an independent air-cooled / water-cooled device. However, this heat dissipation method only plays the role of heat transfer and controlling the oil temperature, and fails to effectively recover and utilize this part of the heat energy, resulting in serious energy waste.

[0047] Traditional heat energy treatment methods ignore the potential for secondary utilization of heat energy, simply dissipating the heat energy that could be converted into electrical energy or other forms of available energy into the air. Considering the high standards for energy efficiency and sustainability in modern vehicles, especially new energy commercial vehicles, this lack of energy recovery has become a key bottleneck in improving the performance of the hydrodynamic retarder system.

[0048] Given the large scale of heat energy generated during the operation of the hydrodynamic retarder and its important position in the vehicle auxiliary braking system, implementing an effective heat energy recovery strategy can not only significantly improve the overall energy efficiency of the system and reduce energy consumption, but also bring obvious economic benefits. By converting heat energy into electrical energy, it can power other electrical systems of the vehicle, such as air conditioners, lighting, entertainment systems, or be fed back to the battery pack to provide additional energy support for vehicle operation. This not only reduces the dependence on the on-vehicle battery, lowers operating costs, but also promotes the environmental performance of the vehicle to some extent, reflecting the practice of the concept of green transportation.

[0049] Facing the challenges of heat energy recovery in the hydrodynamic retarder system, researchers and engineers are actively seeking innovative solutions to achieve the effective utilization of heat energy. This includes developing high-efficiency thermoelectric conversion devices, optimizing the integrated design of heat dissipation and energy conversion, and exploring other advanced technologies that can directly convert heat energy into useful working energy. This research direction is not only crucial for improving vehicle performance, but also a key step in the transformation of the commercial vehicle industry towards a greener and more efficient energy utilization model.

[0050] Combined with Figure 1As shown, according to a specific embodiment of the present application, a hydraulic retarder system is provided, including: a hydraulic retarder, an oil guiding device 8, and a thermal energy conversion device 14. The hydraulic retarder is provided with a retarder working chamber 6. The third oil inlet of the oil guiding device 8 is communicated with the second oil outlet 5 of the retarder working chamber 6. The third oil outlet of the oil guiding device 8 is communicated with the second oil inlet 7 of the retarder working chamber 6. The fourth oil inlet of the thermal energy conversion device 14 is communicated with the fifth oil outlet of the oil guiding device 8. The fourth oil outlet of the thermal energy conversion device 14 is communicated with the fifth oil inlet of the oil guiding device 8. The thermal energy conversion device 14 is electrically connected to an external device, and the thermal energy conversion device 14 is used to convert the thermal energy generated by the hot oil into electrical energy for use by the external device.

[0051] Applying the technical solution of this embodiment, by introducing the oil guiding device 8 and the thermal energy conversion device 14, the oil guiding device 8 is connected to the hydraulic retarder to receive high-temperature and high-pressure oil. At the same time, it ensures the circulation and reflux of the oil, maintains the oil circulation in the retarder working chamber 6. The thermal energy conversion device 14 is electrically connected to the external device, converts thermal energy into electrical energy, and directly supplies power to these external devices, realizing the efficient conversion of thermal energy to electrical energy. This not only improves the energy utilization efficiency of the system but also brings significant economic and environmental benefits, and solves the problem that the braking torque gear of the existing hydraulic retarder is difficult to adapt to the requirements under different working conditions.

[0052] The oil guiding device 8 is composed of a series of channels, vanes or guide plates, and the design of these components aims to control the direction and speed of the oil flow. In the hydraulic retarder system, the guiding device is located in the oil circuit between the oil pump and the stator-rotor working chamber of the retarder, or is directly integrated inside the retarder to adapt to the flow characteristics of the oil under different temperature and pressure conditions. When the oil is pumped into the system by the oil pump, it first enters the oil guiding device 8. The channels or vanes inside the guiding device will guide the oil to flow along a predetermined route according to the pressure and flow rate of the oil. The design of these guiding paths usually takes into account factors such as the viscosity of the oil, the shape of the working chamber, and the requirements of the braking torque.

[0053] The thermal energy conversion device 14 uses a thermionic energy converter. The core of the thermionic energy converter lies in using a material that can conduct ions well at high temperatures, such as certain metal oxides. Such materials will dissociate a large number of charged ions at high temperatures. When the temperature on one side of the material is higher than that on the other side, the ions will migrate from the high-temperature region to the low-temperature region, forming an electric potential difference.

[0054] High-temperature hot oil is introduced to one side of the thermionic energy converter through a specific channel and directly contacts the conductive material. The high temperature of the oil causes the material to heat up to a sufficiently high temperature, activating the dissociation and migration of ions. The other side of the thermionic energy converter is in contact with a lower-temperature environment or a cooling system, forming a temperature gradient. This design ensures that ions move from the high-temperature side to the low-temperature side, generating an electric potential difference. Under the action of the temperature gradient, high-energy ions migrate from the material on the hot oil contact side to the low-temperature side. This migration process is accompanied by charge separation, that is, positive ions and negative ions move to both ends of the material respectively. The migration of ions establishes an electric potential difference at both ends of the thermionic energy converter, similar to the positive and negative poles of a battery. When the circuit is closed, charges flow driven by the electric potential difference, generating an electric current, thereby converting thermal energy into electrical energy. The converted electrical energy is adjusted by being built into the external battery 16 to ensure that the output electrical energy meets the usage requirements of external devices, such as adapting to the voltage and current specifications of the motor. The generated electrical energy can be directly supplied to external devices for use, such as powering the motor 17, or only stored in the external battery 16 as part of the vehicle's auxiliary power supply or energy recovery system for subsequent power demands.

[0055] Furthermore, the hydraulic retarder system further includes: an oil pumping assembly, the first oil outlet of the oil pumping assembly is communicated with the second oil inlet 7, and the oil pumping assembly is used for inputting oil into the retarder working chamber 6. The oil pumping assembly can accurately control the oil pressure and flow rate input into the retarder working chamber, which is crucial for achieving efficient auxiliary braking. Through the precise speed regulation of the motor, the oil pumping assembly can quickly respond to the driver's braking demand, ensuring that sufficient braking torque can be provided at any time, while avoiding unstable system performance caused by too high or too low oil pressure.

[0056] In this embodiment, the oil pumping assembly includes: an oil sump 1, an oil pump 18, and a motor 17. The first oil inlet of the oil pump 18 is communicated with the oil sump 1, the first oil outlet of the oil pump 18 is communicated with the second oil inlet 7, the main shaft of the motor 17 is connected to the drive input end of the oil pump 18, and the motor 17 is used to drive the oil pump 18 to be in a working state. Among them, the oil pump 18 is used to input the oil in the oil sump 1 into the retarder working chamber 6.

[0057] The precise speed control ability of the motor 17 enables the oil pump 18 to quickly and accurately adjust the oil delivery volume according to actual needs. This precision is crucial for ensuring that the oil pressure in the retarder working chamber 6 is in an optimal state, thereby providing a stable and adjustable braking torque. It avoids fluctuations in braking performance caused by insufficient or excessive oil supply, improving driving safety and system responsiveness.

[0058] The design of the motor-driven oil pump enables the rapid start and stop of the oil pump, eliminating the need to rely on the mechanical movement of the vehicle to drive the oil pump as in traditional systems. This means that in scenarios such as emergency braking or when quick response is required, the system can immediately provide the required auxiliary braking force, improving the overall braking response speed of the vehicle and having a significant effect on enhancing driving safety.

[0059] In an exemplary embodiment, the hydraulic retarder system further includes: an oil temperature sensor 9, which is disposed on the connecting pipeline between the third oil outlet and the second oil inlet 7, and the oil temperature sensor 9 is used to periodically detect the oil temperature data.

[0060] The oil temperature sensor 9 can periodically detect the oil temperature data to ensure that the system always has a grasp of the oil temperature situation. For the hydraulic retarder, the monitoring of the oil temperature is crucial because too high or too low oil temperature will affect the working performance and stability of the retarder. Through real-time monitoring, the system can take timely measures, such as adjusting the motor speed to change the working state of the oil pump, or starting the heat energy conversion component to reduce the oil temperature, preventing potential safety hazards caused by abnormal oil temperature.

[0061] The data feedback of the oil temperature sensor 9 is extremely crucial for optimizing the efficiency of the heat energy recovery system. During the process of converting heat energy into electrical energy, the oil temperature directly affects the thermoelectric conversion efficiency. Only when the oil temperature reaches or exceeds the set temperature threshold can the heat energy conversion component operate at the highest efficiency. The oil temperature sensor 9 helps the system determine when to start or stop the heat energy conversion component by periodically detecting the oil temperature, ensuring that the heat energy is efficiently recovered during the most suitable time period, and improving the economy and environmental friendliness of energy reuse.

[0062] Furthermore, the hydraulic retarder system further includes: a first temperature sensor 13, which is disposed at the fourth oil inlet, and the first temperature sensor 13 is used to periodically detect the inlet oil temperature data before the oil enters the heat energy conversion device. A second temperature sensor 15, which is disposed at the fourth oil outlet, and the second temperature sensor 15 is used to periodically detect the outlet oil temperature data after the oil enters the heat energy conversion device.

[0063] The heat energy conversion device relies on the temperature difference between the oil and the cooling medium to generate a thermoelectric effect or drive a heat engine. By comparing the data of the first temperature sensor 13 and the second temperature sensor 15, the temperature difference during the heat energy conversion process can be accurately calculated to ensure that the device is in the best working state, thereby improving the energy conversion efficiency and reducing heat energy waste.

[0064] In this embodiment, the hydrodynamic retarder system further includes: a second hydraulic valve 11. The pump oil assembly is connected to the pump oil assembly through the second hydraulic valve 11. The second hydraulic valve 11 can precisely control the flow path and flow rate of the oil from the pump oil assembly to the heat energy conversion device and respond quickly according to system requirements. This control ability not only speeds up the start-up time of the hydrodynamic retarder, ensuring that the driver can immediately obtain the required auxiliary braking force, but also makes the system more flexible under different working conditions, capable of adjusting the oil supply according to real-time driving conditions and providing a more personalized and precise braking experience.

[0065] In an exemplary embodiment, the hydrodynamic retarder system further includes: an oil pressure sensor 10. The oil pressure sensor 10 is arranged on the connecting pipeline between the second hydraulic valve 11 and the second oil inlet 7. The oil pressure sensor 10 is used to periodically detect the oil pressure data. The oil pressure sensor 10 can assist the system in determining when to start the heat energy conversion device to achieve the most efficient heat energy recovery. When the oil pressure reaches a certain threshold, this usually means that the oil has been heated to a degree where heat energy can be effectively converted. At this time, the system can activate the heat energy conversion device in a timely manner to convert the excess heat energy into electrical energy or other forms of useful energy, thereby reducing energy waste. Moreover, the oil pressure sensor 10 can continuously monitor the oil pressure in the oil circuit, which is crucial for ensuring the safe operation of the hydrodynamic retarder system. Abnormal oil pressure often indicates potential problems within the system, such as oil pump failure, oil circuit blockage or leakage. By continuously monitoring the oil pressure, the system can respond immediately and take necessary adjustment measures, such as reducing the motor speed or starting a standby oil pump, to prevent potential accidents and ensure the safety of the driver and the vehicle.

[0066] Furthermore, the hydrodynamic retarder system further includes: a safety valve 12. The safety valve 12 is arranged on the connecting pipeline between the pump oil assembly and the second hydraulic valve 11. The core function of the safety valve 12 is to prevent the oil pressure in the system from exceeding the safety limit. During the operation of the hydrodynamic retarder, the oil pressure may rise sharply under the pressure of the oil pump and the hydraulic system, especially when the oil circuit is blocked or the system demand suddenly increases. The safety valve 12 can sense this pressure increase and quickly open when it exceeds the preset threshold, releasing the excess oil pressure to the safety circuit or the fuel tank to avoid system overload, effectively preventing mechanical damage or safety accidents caused by excessive oil pressure and ensuring the safety of the driver and the vehicle.

[0067] In this embodiment, the hydraulic retarder system further includes: a filter 19. The oil pumping assembly is connected to the oil sump 1 through the filter 19. The main responsibility of the filter 19 is to remove impurities and particulate matters in the oil. These impurities may come from sediments in the oil sump 1, metal fragments generated by wear, or other external contaminations. By purifying the oil, the filter 19 can reduce the wear of key components such as oil pumps, hydraulic valves, and stator-rotors caused by these impurities, prevent blockages and damages, thereby improving the reliability and operating efficiency of the entire system. The pure oil can also ensure the efficient operation of the heat energy conversion device and avoid unstable operation caused by impurities.

[0068] In an exemplary embodiment, the hydraulic retarder system further includes: a one-way regulating valve 2. The one-way regulating valve 2 is arranged on the connecting pipeline between the filter 19 and the oil sump 1. The main characteristic of the one-way regulating valve 2 is that it only allows the oil to flow in one direction, that is, from the oil sump 1 through the filter 19 to the hydraulic retarder system. This mechanism effectively prevents the reverse flow of oil in the system, avoiding system chaos and damages caused by oil backflow, such as dry running of the oil pump or air being brought into the oil sump when the oil returns, ensuring the stability and safety of the oil circuit.

[0069] Furthermore, the hydraulic retarder system further includes: a first hydraulic valve 4. The second oil outlet 5 is connected to the oil sump 1 through the first hydraulic valve 4. The core function of the first hydraulic valve 4 lies in controlling the process of the oil flowing back from the working chamber of the retarder to the oil sump 1. During the operation of the hydraulic retarder, after the oil passes through the stator-rotor chamber and generates braking force, through the precise adjustment of the first hydraulic valve 4, it can ensure that the oil flows back smoothly and controllably, rather than being discharged disorderly. This control of the oil backflow process avoids system instability that may be caused by sudden changes in oil circuit pressure, enhancing the operating reliability of the entire hydraulic retarder system.

[0070] According to an embodiment of the present invention, a method embodiment of a control method for a hydraulic retarder system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0071] The method embodiments can be executed in an electronic device including a memory and a processor or a similar computing device. Taking the operation on a controller as an example, the controller may include one or more processors (the processors may include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field programmable gate array (FPGA), a neural-network processor unit (NPU), a tensor processing unit (TPU), an artificial intelligence (AI) type processor, etc.) and a memory for storing data. Optionally, the above controller may further include a transmission device, an input / output device, and a display device for communication functions. Those of ordinary skill in the art can understand that the above structural description is only illustrative and does not limit the structure of the above controller. For example, the controller may further include more or fewer components than the above structural description, or have a different configuration from the above structural description.

[0072] The memory can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the seat belt reminder method in the embodiments of the present invention. The processor executes various functional applications and data processing by running the computer program stored in the memory, that is, the control method of the above hydraulic retarder system is realized. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, a flash memory, or other non-volatile solid-state memories. In some instances, the memory may further include a memory remotely disposed relative to the processor, and these remote memories can be connected to the mobile terminal through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0073] The transmission device is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of a mobile terminal. In one example, the transmission device includes a network adapter (Network Interface Controller, abbreviated as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device can be a Radio Frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0074] The display device can be, for example, a touch-screen type Liquid Crystal Display (LCD) and a touch display (also referred to as a "touch screen" or "touch display screen"). The liquid crystal display enables a user to interact with the user interface of the mobile terminal. In some embodiments, the above-mentioned mobile terminal has a Graphical User Interface (GUI), and the user can perform human-computer interaction with the GUI through finger contacts and / or gestures on the touch-sensitive surface. The human-computer interaction function here optionally includes the following interactions: creating web pages, drawing, word processing, creating electronic documents, games, video conferencing, instant messaging, sending and receiving emails, call interfaces, playing digital videos, playing digital music, and / or web browsing, etc. The executable instructions for performing the above human-computer interaction functions are configured / stored in a computer program product or a readable storage medium executable by one or more processors.

[0075] According to another specific embodiment of the present application, as Figure 2 shown, a control method for a hydraulic retarder system, characterized in that the control method is used to control the above-mentioned hydraulic retarder system, and the control method includes the following steps:

[0076] Step S110, in response to the motor being in the first target operating state signal, obtain oil temperature data;

[0077] In step S110, when the vehicle driver or the autonomous driving issues a braking torque request data, immediately respond and generate a second control instruction set. The primary task of this instruction set is to control the motor to enter the starting operating state. The starting operating state means that the motor will run in a pre-set high-speed mode to quickly start the oil pump to ensure that the oil quickly reaches the working chamber and builds up the necessary oil pressure, so as to respond to the braking demand in a timely manner.

[0078] The motor receives the start signal and then starts to run, driving the oil pump to work. As the oil pump continues to operate, the pressure of the oil pumped into the oil circuit gradually increases. When the product of the oil pressure and the pressure-receiving area exceeds the force of the spring of the spool of the second hydraulic valve 11, the hydraulic valve changes its position. This position-changing action allows the oil to flow from the outlet of the oil pump to the working chamber of the stator and rotor of the retarder, creating conditions for the generation of braking torque.

[0079] The oil entering the working chamber of the stator and rotor is affected by the rotation of the rotor and begins to form a vortex motion in the chamber. This process is similar to the movement of water in a whirlpool, but here, the vortex motion of the oil is combined with the rotation of the rotor to generate a strong resistance, namely the so-called braking torque. This force acts on the transmission of the vehicle to help the vehicle decelerate or maintain a stable speed.

[0080] The oil pressure data will be obtained in real time. The acquisition of the oil pressure data is completed by the oil pressure sensor installed in the oil circuit, which can accurately measure the oil pressure in the working chamber. Based on the second oil pressure threshold A, the oil pressure data B obtained in real time is judged to obtain the third judgment result. The second oil pressure threshold A here is a key parameter set in advance and is used to distinguish between high and low speed modes.

[0081] If the judgment result is A < B, that is, the current oil pressure has exceeded the preset threshold, it is considered that there is sufficient oil pressure to generate the required braking torque. Therefore, the first target gear mode will be determined as the low speed mode. In this mode, the motor speed will be adjusted to a lower level to maintain sufficient oil pressure and reduce energy consumption, while preventing the oil temperature from being too high.

[0082] On the contrary, if the judgment result is A ≥ B, it indicates that the current oil pressure is not sufficient to meet the demand for braking torque, and the first target gear mode will be determined as the high speed mode. In this mode, the motor will maintain or increase to a higher speed to quickly increase the oil output of the oil pump and increase the oil pressure until it reaches or exceeds the preset threshold A to ensure the generation of braking torque.

[0083] According to the determined first target gear mode, the third control instruction set is generated for control. This instruction set contains specific control parameters for the motor, such as the motor speed, torque, working time, and power consumption. The motor adjusts its working state according to these instructions, that is, enters the low speed mode or the high speed mode, to achieve precise control of the oil pressure.

[0084] After the motor responds to the braking torque request and adjusts to the corresponding working state, it will continue to obtain the oil temperature data. The acquisition of the oil temperature data also depends on the temperature sensor installed in the oil circuit to monitor the real-time temperature of the oil. If the oil temperature exceeds the preset safety range, measures will be taken, such as converting excess heat into electrical energy through a thermionic energy converter or starting cooling to reduce the oil temperature, ensuring stable operation and normal performance of the oil.

[0085] Step S120, based on the oil temperature data, determine the first target working mode;

[0086] In step S120, set the first oil temperature threshold C as the benchmark for whether the oil temperature is suitable for starting the retarder to work. Real-time collect the oil temperature data B and compare it with the preset threshold C to obtain the first judgment result.

[0087] When the first judgment result is C > B, that is, the oil temperature is lower than the set starting condition, automatically determine the first target working mode as the waiting mode. In the waiting mode, suspend the heat energy conversion and braking assistance, avoid starting the oil pump and motor under low temperature conditions, and reduce unnecessary energy consumption and wear on it.

[0088] If the first judgment result is C ≤ B, that is, the oil temperature has reached or exceeded the working threshold, it will enter the next stage to further monitor the temperature difference of the oil to evaluate the feasibility of heat energy conversion.

[0089] Temperature difference monitoring: Collect the inlet oil temperature data (denoted as F) and the outlet oil temperature data (denoted as G), and calculate the oil temperature difference data E = |G - F|, that is, the temperature change amount of the oil before and after passing through the retarder.

[0090] Temperature difference threshold comparison: Compare the oil temperature difference data E with the preset oil temperature difference threshold D to obtain the second judgment result to judge whether the heat energy conversion reaches the set efficiency standard.

[0091] When the second judgment result is D > E, that is, the oil temperature difference is lower than the set heat energy conversion start threshold, determine the first target working mode as the waiting mode again. This indicates that the heat energy conversion efficiency is low and insufficient to start the heat energy conversion, and continue to maintain the low energy consumption state until the conditions improve.

[0092] If the second judgment result is D ≤ E, that is, the oil temperature difference reaches the set heat energy conversion start condition, determine the first target working mode as the heat energy conversion mode. In this mode, start the heat energy converter to convert the heat energy generated by the oil due to braking into electrical energy for other uses of the vehicle, realizing the effective recovery and reuse of energy.

[0093] Through fine control based on oil temperature and temperature difference, the thermal energy conversion can be maximized, energy waste is reduced, the recycling of energy is promoted, and the overall energy efficiency of the vehicle is improved. When the temperature is below the appropriate level, it automatically enters the waiting mode, avoiding mechanical wear and overload that may occur during operation under adverse conditions, extending the lifespan, and enhancing its reliability. The working mode is dynamically adjusted according to real-time oil temperature and temperature difference data to ensure the most suitable performance under different working conditions, improving adaptability and flexibility.

[0094] Step S130: Generate a first control instruction set based on the first target working mode, where the first control instruction set is used to control the thermal energy conversion device to be in the first target working state.

[0095] In step S130, the determined first target working mode can be the waiting mode, the thermal energy conversion mode, etc. The determination of this mode is based on the real-time detection of oil temperature, oil pressure, and oil temperature difference to ensure that the system operates under the most suitable conditions.

[0096] When the oil temperature is lower than the minimum working temperature set by the system, or the oil temperature difference is insufficient to start the thermal energy conversion, the system will be in the waiting mode. In this mode, the motor and the oil pump maintain a low power consumption or are shut down, and the thermal energy conversion device also does not work to avoid unnecessary energy consumption and system wear.

[0097] If the oil temperature and temperature difference reach the set threshold values, indicating that the conditions for thermal energy conversion are ripe, the system will then enter the thermal energy conversion mode. In this mode, the motor drives the oil pump at an appropriate speed to ensure the oil circulation. Meanwhile, the thermal energy conversion device is started to efficiently convert the thermal energy in the oil into electrical energy.

[0098] Adjust the motor speed to the preset efficient working point to ensure that the oil pump can pump the oil at the optimal speed. Control the oil pump to operate at the best pumping pressure and flow rate to ensure that the oil forms a vortex in the working cavity of the stator and rotor, generating a braking torque. The hydraulic valve is adjusted to a state where the oil can smoothly enter the working cavity and circulate to the heat exchanger. At the same time, maintain an appropriate pressure in the oil circuit to promote the thermal energy conversion.

[0099] Start the thermal energy conversion device, such as a thermal energy converter, to convert the thermal energy carried by the oil passing through the heat exchanger into electrical energy, which is stored in the battery or directly used by the motor. Monitor the oil temperature difference and the oil temperature to ensure that the temperature difference data E is maintained below the oil temperature difference threshold D to maintain the continuity and efficiency of the thermal energy conversion. When the oil temperature or temperature difference does not reach the set waiting mode conditions, continuously monitor and adjust the motor speed and the working state of the oil pump according to the real-time data to maintain the optimal working state in the thermal energy conversion mode.

[0100] In this embodiment, determining the first target operating mode based on the oil temperature data includes: judging the oil temperature data based on the first oil temperature threshold to obtain a first judgment result, where the first oil temperature threshold is C and the oil temperature data is B; in response to the first judgment result being C > B, determining the first target operating mode as the waiting mode; in response to the first judgment result being C ≤ B, obtaining the inlet oil temperature data and the outlet oil temperature data; determining the oil temperature difference data based on the inlet oil temperature data and the outlet oil temperature data; judging the oil temperature difference data based on the oil temperature difference threshold data to obtain a second judgment result, where the oil temperature difference threshold data is D and the oil temperature difference data is E; in response to the second judgment result being D > E, determining the first target operating mode as the waiting mode; in response to the second judgment result being D ≤ E, determining the first target operating mode as the heat energy conversion mode.

[0101] The above optional embodiments of the present application can achieve the following beneficial effects: It can identify the best heat energy conversion timing, that is, when the oil temperature difference E reaches or exceeds the preset oil temperature difference threshold D, the heat energy conversion mode is started. This avoids starting the heat energy conversion when the temperature difference is small and the heat energy conversion efficiency is low, thereby reducing the ineffective loss of energy and ensuring the efficient utilization of energy during the operation of the system.

[0102] In an exemplary embodiment, in response to the motor being before the first target operating state signal, it includes: in response to the braking torque request data, generating a second control instruction set for controlling the motor to be in the starting operating state; in response to the motor being in the starting operating state signal, obtaining the oil pressure data; determining the second target operating mode based on the oil pressure data; generating a third control instruction set based on the second target operating mode for controlling the motor to be in the first target operating state.

[0103] The above optional embodiments of the present application can achieve the following beneficial effects: When the braking torque request data is received, a second control instruction set will be immediately generated to control the motor to enter the starting operating state, quickly increasing the oil pressure to meet the immediate braking demand. This immediate response ability ensures that the vehicle can quickly take auxiliary braking measures in an emergency, improving driving safety. At the same time, by precisely controlling the motor speed, the system can adjust the speed and quantity of the oil pump entering the stator-rotor working chamber in real time according to the actual braking torque request, realizing the refined management of the braking torque and avoiding the situations of over-braking or under-braking.

[0104] Figure 3 It is a structural block diagram of a control device of a hydraulic retarder system according to an embodiment of the present invention. The device includes:

[0105] An acquisition module, configured to acquire oil temperature data in response to the motor being in a first target operating state signal;

[0106] A determination module, configured to determine a first target operating mode based on the oil temperature data;

[0107] A control module, configured to generate a first control instruction set based on the first target operating mode, the first control instruction set being used to control the heat energy conversion device to be in a first target operating state.

[0108] It should be noted that the above-mentioned various modules can be implemented by software or hardware. For the latter, it can be achieved in the following ways, but not limited to this: the above-mentioned modules are all located in the same processor; or, the above-mentioned various modules are respectively located in different processors in any combination form.

[0109] According to an embodiment of the present invention, there is also provided an electronic device, including: a memory storing an executable program; a processor configured to run the program, wherein when the program runs, it executes the control method of the hydraulic retarder system described above.

[0110] Optionally, in this embodiment, the above-mentioned processor can be set to execute the following steps through a computer program:

[0111] Step S1, in response to the motor being in a first target operating state signal, acquire oil temperature data;

[0112] Step S2, determine a first target operating mode based on the oil temperature data;

[0113] Step S3, generate a first control instruction set based on the first target operating mode, the first control instruction set being used to control the heat energy conversion device to be in a first target operating state.

[0114] According to an embodiment of the present invention, there is also provided a computer-readable storage medium, the computer-readable storage medium including a stored executable program, wherein when the executable program runs, it controls the device where the storage medium is located to execute the control method of the hydraulic retarder system described above.

[0115] Optionally, in this embodiment, the above-mentioned storage medium can be set to store a computer program for executing the following steps:

[0116] Step S1, in response to the motor being in a first target operating state signal, acquire oil temperature data;

[0117] Step S2, determine a first target operating mode based on the oil temperature data;

[0118] Step S3: Generate a first control instruction set based on the first target operating mode, where the first control instruction set is used to control the thermal energy conversion device to be in the first target operating state.

[0119] Optionally, in this embodiment, the above storage medium may include, but is not limited to: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store computer programs.

[0120] According to one embodiment of the present invention, there is also provided a computer program product, including a computer program, where the computer program, when executed by a processor, implements the control method of the above hydraulic retarder system.

[0121] Optionally, in this embodiment, the above computer program product may be set to a computer program that executes the following steps:

[0122] Step S1: In response to the signal that the motor is in the first target operating state, obtain oil temperature data;

[0123] Step S2: Based on the oil temperature data, determine the first target operating mode;

[0124] Step S3: Generate a first control instruction set based on the first target operating mode, where the first control instruction set is used to control the thermal energy conversion device to be in the first target operating state.

[0125] According to another specific embodiment of the present application, there is also provided a vehicle, including a hydraulic retarder system, where the hydraulic retarder system is the above hydraulic retarder system.

[0126] The above optional embodiments of the present application can achieve the following beneficial effects: The integrated hydraulic retarder system can accurately control the rotational speed of the oil pump through the motor according to vehicle driving conditions and driver needs, thereby adjusting the oil pressure entering the stator-rotor working chamber and achieving smooth and controllable braking torque. This precise braking torque control ensures that the vehicle can obtain a stable deceleration effect under various road conditions, such as downhill in mountainous areas, heavy loads, or emergency braking situations, reduce the wear of brake pads, and improve driving safety.

[0127] In the present application, "a plurality of" means two or more.

[0128] In this application, unless otherwise clearly defined, the terms "install", "connect", and "couple" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0129] The terms "first", "second", "third", "fourth", etc. (if any) in this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0130] The term "and / or" in this application is merely a correlative relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the associated objects before and after.

[0131] If there is no special indication, all steps of this application can be carried out in sequence or randomly. For example, the method includes steps A and B, indicating that the method may include steps A and B carried out in sequence, or may also include steps B and A carried out in sequence. For example, it is mentioned that the method may further include step C, indicating that step C can be added to the method in any order. For example, the method may include steps A, B, and C, or may also include steps A, C, and B, or may include steps C, A, and B, etc.

[0132] The above description is only the preferred embodiments of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A hydrodynamic retarder system, characterized in that, Comprising: A hydraulic retarder, the hydraulic retarder being provided with a retarder working chamber (6); An oil guiding device (8), a third oil inlet of the oil guiding device (8) being communicated with a second oil outlet (5) of the retarder working chamber (6), and a third oil outlet of the oil guiding device (8) being communicated with a second oil inlet (7) of the retarder working chamber (6); A heat energy conversion device (14), a fourth oil inlet of the heat energy conversion device (14) being communicated with a fifth oil outlet of the oil guiding device (8), a fourth oil outlet of the heat energy conversion device (14) being communicated with a fifth oil inlet of the oil guiding device (8), the heat energy conversion device (14) being electrically connected to an external device, and the heat energy conversion device (14) being configured to convert heat energy generated by hot oil into electric energy for use by the external device.

2. The hydrodynamic retarder system according to claim 1, characterized in that, The hydraulic retarder system further comprises: An oil pumping assembly, a first oil outlet of the oil pumping assembly being communicated with the second oil inlet (7), and the oil pumping assembly being configured to input oil into the retarder working chamber (6).

3. The hydrodynamic retarder system according to claim 2, wherein, The oil pumping assembly comprises: An oil sump (1); An oil pump (18), a first oil inlet of the oil pump (18) being communicated with the oil sump (1), and the first oil outlet of the oil pump (18) being communicated with the second oil inlet (7); A motor (17), a main shaft of the motor (17) being connected to a driving input end of the oil pump (18), and the motor (17) being configured to drive the oil pump (18) to be in a working state; Wherein, the oil pump (18) is configured to input the oil in the oil sump (1) into the retarder working chamber (6).

4. The hydrodynamic retarder system according to claim 1, characterized in that, The hydraulic retarder system further comprises: An oil temperature sensor (9), the oil temperature sensor (9) being arranged on a connecting pipeline between the third oil outlet and the second oil inlet (7), and the oil temperature sensor (9) being configured to periodically detect oil temperature data.

5. The hydraulic retarder system according to claim 1, characterized in that The hydraulic retarder system further comprises: A first temperature sensor (13), the first temperature sensor (13) being arranged at the fourth oil inlet, and the first temperature sensor (13) being configured to periodically detect the inlet oil temperature data of the oil before entering the heat energy conversion device; A second temperature sensor (15), the second temperature sensor (15) being arranged at the fourth oil outlet, and the second temperature sensor (15) being configured to periodically detect the outlet oil temperature data of the oil after entering the heat energy conversion device.

6. The hydrodynamic retarder system according to claim 3, characterized in that, The hydraulic retarder system further comprises: A second hydraulic valve (11), the oil pumping assembly being communicated with the oil pumping assembly through the second hydraulic valve (11); And / or; An oil pressure sensor (10), the oil pressure sensor (10) being arranged on a connecting pipeline between the second hydraulic valve (11) and the second oil inlet (7), and the oil pressure sensor (10) being configured to periodically detect oil pressure data; And / or; A safety valve (12), the safety valve (12) being arranged on a connecting pipeline between the oil pumping assembly and the second hydraulic valve (11); And / or; A filter (19), the pump oil assembly is communicated with the oil sump (1) through the filter (19); and / or; A one-way regulating valve (2), the one-way regulating valve (2) is arranged on the connecting pipeline between the filter (19) and the oil sump (1); and / or; A first hydraulic valve (4), the second oil outlet (5) is communicated with the oil sump (1) through the first hydraulic valve (4).

7. A control method for a hydrodynamic retarder system, characterized in that The control method is used to control the hydraulic retarder system according to any one of claims 1-6, and the control method includes the following steps: Responding to the signal that the motor is in the first target working state, acquiring oil temperature data; Based on the oil temperature data, determining a first target working mode; Based on the first target working mode, generating a first control instruction set, and the first control instruction set is used to control the heat energy conversion device to be in the first target working state.

8. The control method according to claim 7, wherein Determining the first target working mode based on the oil temperature data includes: Judging the oil temperature data based on a first oil temperature threshold to obtain a first judgment result, wherein the first oil temperature threshold is C and the oil temperature data is B; Responding to the case where the first judgment result is C > B, determining the first target working mode as the waiting mode; Responding to the case where the first judgment result is C ≤ B, acquiring the inlet oil temperature data and the outlet oil temperature data; Based on the inlet oil temperature data and the outlet oil temperature data, determining the oil temperature difference data; Judging the oil temperature difference data based on the oil temperature difference threshold data to obtain a second judgment result, wherein the oil temperature difference threshold data is D and the oil temperature difference data is E; Responding to the case where the second judgment result is D > E, determining the first target working mode as the waiting mode; Responding to the case where the second judgment result is D ≤ E, determining the first target working mode as the heat energy conversion mode.

9. The control method according to claim 7, wherein Before responding to the signal that the motor is in the first target working state, it includes: Responding to the braking torque request data, generating a second control instruction set, and the second control instruction set is used to control the motor to be in the starting working state; Responding to the signal that the motor is in the starting working state, acquiring the oil pressure data; Based on the oil pressure data, determining a second target working mode; Based on the second target working mode, generating a third control instruction set, and the third control instruction set is used to control the motor to be in the first target working state.

10. A vehicle, comprising a hydraulic retarder system, characterized in that, The hydraulic retarder system is the hydraulic retarder system according to any one of claims 1 to 9.

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