Control method of hydraulic system, vehicle, electronic equipment and power system

Abstract

The invention provides a control method of a hydraulic system, a vehicle, electronic equipment and a power system. The hydraulic system comprises a first control device, a second control device, a power component and a heating component. The control method comprises the steps that the environment temperature and the first operation state of the first control device are received; when it is detected that the first operation state meets the preset operation condition and the environment temperature is within the preset temperature range, a first control device is controlled to conduct a first oil way and a second oil way, hydraulic oil is conveyed to a power component through the first oil way, and the hydraulic oil is conveyed to a heating component through the second oil way; and when it is detected that the first operation state does not meet the preset operation condition or the environment temperature is not within the preset temperature range, the second control device is controlled to conduct the third oil way, and the hydraulic oil is conveyed to the power component through the third oil way. By simplifying the control logic of the hydraulic control system, the response speed of the hydraulic system is increased, and the reliability of the system is enhanced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a control method for a hydraulic system, a vehicle, an electronic device, and a power system. Background Art

[0002] The current transmissions of multi-speed and new energy vehicles require high-pressure oil to control the action of actuators, such as clutches, brakes, and synchronizers. Some manufacturers use the electronic double pump solution because of its simple structure, low cost, and small layout space, and many products have been put into mass production.

[0003] Due to the requirements of transmission properties, the oil pump needs to maintain stable performance over the entire temperature range, and the oil pump motor assembly is required to have higher power during the operation of the high-pressure pump or when starting at low temperatures to meet the needs of the product. In related technologies, the transmission hydraulic oil pump system has the problem of delayed startup under harsh conditions. Summary of the invention

[0004] In view of this, the present application provides a control method of a hydraulic system, a vehicle, an electronic device and a power system, which can enable the vehicle to maintain stable operation even under low temperatures or other harsh conditions.

[0005] The embodiment of the present application provides a control method for a hydraulic system, wherein the hydraulic system includes a first control device, a second control device, a power component, and a heating component; The first control device is used to control the switch of the first oil circuit and the second oil circuit, the first oil circuit is connected to the power component, and the second oil circuit is connected to the heating component; the second control device is used to control the switch of the third oil circuit, and the third oil circuit is connected to the power component; the power component is used to provide driving oil pressure, and the heating component is used to provide cooling lubricating oil pressure; The control method includes: receiving the ambient temperature and the first operating state of the first control device; when it is detected that the first operating state meets the preset operating conditions and the ambient temperature is within the preset temperature range, controlling the first control device to connect the first oil circuit and the second oil circuit, and the hydraulic oil is delivered to the power component through the first oil circuit, and the hydraulic oil is delivered to the heat-generating component through the second oil circuit; when it is detected that the first operating state does not meet the preset operating conditions, and / or the ambient temperature is not within the preset temperature range, controlling the second control device to connect the third oil circuit, and the hydraulic oil is delivered to the power component through the third oil circuit.

[0006] Compared with the related art, the embodiment of the present application has at least the following advantages: by setting up the first control device and the second control device, oil pressure is provided to the power component and the heat generating component respectively, so that when the first system cannot be started, the second control device is quickly responded to complete the oil pressure supply of the power component, thereby improving the oil pressure stability of the hydraulic system. When starting the second control device, the second control device only provides the main oil pressure to the power component through the third oil circuit. By only controlling the third oil circuit at the initial start-up of the second control device, the load reduction logic of the hydraulic system is simplified to ensure that the starting torque of the second control device is low enough, and it can respond quickly in extreme environments, and no overcurrent will be generated during startup, thereby reducing the risk of motor component stalling and overcurrent control.

[0007] Optionally, the first control device includes: a first oil pump, a second oil pump and a brushless motor assembly; the first oil pump is connected to the input end of the first oil circuit, and the second oil pump is connected to the input end of the second oil circuit; the brushless motor assembly is respectively connected to the first oil pump and the second oil pump in transmission; controlling the first control device to connect the first oil circuit and the second oil circuit includes: controlling the brushless motor assembly to provide transmission power to the first oil pump, and the first oil pump connects the first oil circuit after receiving the transmission power; after the oil pressure in the first oil circuit is stable, controlling the brushless motor assembly to provide transmission power to the second oil pump, and the second oil pump connects the second oil circuit after receiving the transmission power.

[0008] Optionally, the hydraulic system also includes a solenoid valve, which is used to control the switch of the fourth oil circuit. One end of the fourth oil circuit is connected to the heating component. The solenoid valve includes: a first state in which the first oil circuit and the fourth oil circuit are connected, and a second state in which the first oil circuit and the fourth oil circuit are not connected to each other.

[0009] Optionally, after controlling the first control device to connect the first oil circuit and the second oil circuit, and allowing the hydraulic oil to be delivered to the power component through the first oil circuit and the hydraulic oil to be delivered to the heat-generating component through the second oil circuit, it also includes: receiving the control power of the first control device; when the control power is greater than a preset power threshold, controlling the solenoid valve to connect the first oil circuit and the fourth oil circuit, so that the hydraulic oil is delivered to the heat-generating component through the fourth oil circuit.

[0010] Optionally, the second control device includes: a third oil pump and a brush motor assembly; the brush motor assembly is used to provide transmission power to the third oil pump, so that the third oil pump delivers hydraulic oil to the power component through the third oil circuit.

[0011] Optionally, controlling the first control device to conduct the first oil circuit and the second oil circuit includes: receiving the first operating state at every preset period; receiving the second operating state of the second control device when the first operating state does not meet the preset operating conditions; switching the first control device to the second control device when the second operating state meets the preset operating conditions; repeatedly starting the first control device when the second operating state does not meet the preset operating conditions; instructing the first control device to stop working when the number of times the first operating state does not meet the preset operating conditions reaches a threshold number.

[0012] Optionally, when the ambient temperature is not within the preset temperature range, after controlling the second control device to connect the third oil circuit, it includes: monitoring the main oil pressure of the power component, and when the main oil pressure meets the operating oil pressure state; controlling the first control device to connect the first oil circuit and the second oil circuit, and delivering the hydraulic oil to the power component through the first oil circuit, and delivering the hydraulic oil to the heat-generating component through the second oil circuit.

[0013] A second aspect of the present application discloses a vehicle, comprising: a hydraulic system, the hydraulic system comprising: a first control device, a second control device, a power component and a heat generating component; The first control device is used to control the supply of driving oil pressure to the power component through the first oil circuit; the second control device supplies cooling lubricating oil pressure to the heat generating component through the second oil circuit; the second control device supplies driving oil pressure to the power component through the third oil circuit; The first control device is used to detect the first operating state of the first control device, and when the first operating state meets the preset operating conditions and the ambient temperature is within the preset temperature range, control the connection of the first oil circuit and the second oil circuit, and make the hydraulic oil be delivered to the power component through the first oil circuit, and the hydraulic oil be delivered to the heat generating component through the second oil circuit; The second control device is used to control the second control device to open the third oil circuit and transport the hydraulic oil to the power component through the third oil circuit when it is detected that the first operating state does not meet the preset operating conditions and / or the ambient temperature is not within the preset temperature range.

[0014] The third aspect of the present application discloses an electronic device, which includes a processor and a memory, wherein the memory is used to store instructions, and the processor is used to call the instructions in the memory so that the electronic device executes the above-mentioned control method of the hydraulic system.

[0015] A fourth aspect of the present application discloses a power system, which includes: a drive motor assembly, a clutch and a hydraulic control system; wherein the hydraulic control system is configured as a control method of any of the above hydraulic systems.

[0016] It can be understood that the vehicle of the second aspect, the electronic device of the third aspect and the power system of the fourth aspect provided above all correspond to the method of the first aspect. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding methods provided above and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the application environment of a control method for a hydraulic system according to an embodiment of the present application.

[0018] Figure 2 It is a flow chart of a control method of a hydraulic system according to an embodiment of the present application.

[0019] Figure 3 It is a flow chart of a control method of a hydraulic system according to yet another embodiment of the present application.

[0020] Figure 4 It is a structural schematic diagram of a hydraulic system according to an embodiment of the present application.

[0021] Figure 5 It is a flow chart of a control method of a hydraulic system according to an embodiment of the present application.

[0022] Figure 6 It is a schematic diagram of functional modules of an electronic device according to an embodiment of the present application.

[0023] Figure 7 It is a schematic diagram of the structure of a power system according to an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the implementation methods of the present application and the features in the implementation methods can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present application. The described implementations are only part of the implementations of the present application, rather than all the implementations.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] It should be further noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0028] In this application, "at least one" means one or more, and "more" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0029] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0030] like Figure 1 As shown, Figure 1 : is a structural diagram of a hydraulic system 100, which includes: a first control device 110, a second control device 120, a power component 130, and a heating component 140. The first control device 110 and the second control device 120 are connected in parallel, and the first control device 110 provides driving oil pressure to the power component 130 along the first oil circuit L1 by absorbing hydraulic oil. The first control device 110 provides cooling lubricating oil pressure to the heating component 140 along the second oil circuit L2 by absorbing hydraulic oil; the second control device 120 provides driving oil pressure to the power component 130 along the third oil circuit L3 by absorbing hydraulic oil.

[0031] It should be noted that the power component 130 includes at least a plurality of clutches. When the driver steps on the clutch pedal, the piston in the vehicle master cylinder pushes the hydraulic oil, and the hydraulic oil transmits pressure to the slave cylinder through the oil circuit, and the piston of the slave cylinder pushes the clutch release bearing, thereby achieving the separation of the clutch. The heat-generating component 140 includes at least one or more of: shaft teeth, bearings, high-voltage motor assemblies and clutches. Through the first control device 110, the hydraulic oil is input into the heat-generating component 130, so that the hydraulic oil cools the heat-generating component.

[0032] Normally, the first control device 110 is used as the main oil supply system, and the second control device 120 is used as the backup oil supply system. When the first control device 110 cannot supply pressure or start, the second control device 120 is started. When the first control system 110 is started, the first oil circuit L1 and the second oil circuit L2 are opened at the same time, and when the second control system 120 is started, only the third oil circuit L3 is opened.

[0033] In one embodiment, the first control device includes: a first oil pump, a second oil pump and a brushless motor assembly; the first oil pump is connected to the input end of the first oil circuit, and the output end of the first oil circuit is connected to the power component; the second oil pump is connected to the input end of the second oil circuit, and the output end of the second oil circuit is connected to the heat-generating component; the brushless motor assembly is respectively connected to the first oil pump and the second oil pump in a transmission manner, and the brushless motor assembly is used to provide power to the first oil pump and the second oil pump.

[0034] In one embodiment, the second control device includes: a third oil pump and a brush motor assembly; the brush motor assembly is used to provide transmission power to the third oil pump, so that the third oil pump controls the hydraulic oil to be delivered to the power component through the third oil circuit, the third oil pump is connected to the input end of the third oil circuit, and the output end of the third oil circuit is connected to the power component.

[0035] like Figure 2 As shown, Figure 2 This is a flow chart of a control method of a hydraulic system according to an embodiment of the present application. The control is applied to a vehicle. The method includes: Step 201: Receive the ambient temperature and the first operating state of the first control device.

[0036] In some embodiments, there is no specific limitation on the method for obtaining the first operating state. For example, the first operating state can be obtained by the first control device or by the vehicle controller. The first operating state is used to determine whether the first control device fails. The first control device includes at least one oil pump to absorb hydraulic oil. The first operating state includes: oil pump start-up state, liquid oil pressure, oil pump current, oil pump speed, and starting torque. The first control device fails when one or more of the following situations occur, such as difficulty in starting the oil pump, liquid oil pressure exceeding the preset liquid oil pressure range, oil pump current exceeding the rated range, oil pump speed exceeding the rated speed, and starting torque exceeding the rated torque range.

[0037] In some embodiments, the vehicle further includes a temperature sensor, and the ambient temperature can be detected by the temperature sensor. It is understandable that this embodiment does not specifically limit the method for obtaining the ambient temperature, and the ambient temperature can be obtained according to actual needs.

[0038] Under normal circumstances, the first control device is started first to provide oil pressure for the vehicle. The first control device is started according to the starting torque. Low temperature will cause the viscosity of the hydraulic oil to increase, making the fluidity of the hydraulic oil worse, thereby increasing the starting torque of the first control device, and the torque received by the first control device does not meet the starting torque, so that the first control device cannot be started.

[0039] Therefore, this step needs to collect the ambient temperature and the first operating state in real time to determine whether the first control device meets the start-up condition. When the first control device does not meet the start-up condition, the second control device is started.

[0040] Step 202, when it is detected that the first operating state meets the preset operating conditions and the ambient temperature is within the preset temperature range, the first control device is controlled to connect the first oil circuit and the second oil circuit, and the hydraulic oil is delivered to the power component through the first oil circuit, and the hydraulic oil is delivered to the heat-generating component through the second oil circuit.

[0041] The first operating state includes: oil pump start state, hydraulic oil pressure, oil pump current, oil pump speed, and starting torque. The first operating state meets the preset operating conditions, including but not limited to: the oil pump start state starts normally (optionally means the oil pump ignites successfully), the hydraulic oil pressure meets the preset hydraulic oil pressure range, the oil pump current meets the rated range, the oil pump speed meets the rated speed, and the starting torque meets the rated torque range.

[0042] Low temperature will make the fluidity of hydraulic oil worse, so that the first control device needs a larger torque to push when starting. For example, when a double electronic pump is used as the first control device, within the preset temperature range, the starting torque is between 0.8 torque and 1 torque, and when it exceeds the preset temperature range, it needs to exceed 1.5 torque.

[0043] Exemplarily, the preset temperature range is between -30 degrees and 50 degrees. When the temperature is lower than -30 degrees or higher than 50 degrees, the first control device considers that the ambient temperature is at an extreme temperature, and the first control device is not started.

[0044] Step 203, when it is detected that the first operating state does not meet the preset operating conditions and / or the ambient temperature is not within the preset temperature range, control the second control device to open the third oil circuit and deliver the hydraulic oil to the power component through the third oil circuit.

[0045] When the first operating state does not meet the preset operating conditions, the controller considers that the first control device fails and starts the second control device. Even if the first operating state meets the preset operating conditions, the first control device of this embodiment will detect whether the ambient temperature is within the preset temperature range. If it is detected that the ambient temperature is not within the preset temperature range, the first control device will not be started, but the second control device with a smaller control torque will be started. Since the ambient temperature is at an extreme temperature, if the first control device with a larger control torque is started, the vehicle will not have enough oil pressure to drive normally. Therefore, this embodiment can maintain the driving oil pressure of the vehicle by starting the second control device with a smaller control torque. At the same time, in order to further reduce the driving torque of the second control device, when controlling the start of the second control device, the third oil circuit is preferentially opened to provide the main oil pressure for the vehicle. Or when the ambient temperature is not within the preset temperature range, the second control device with a smaller control torque is started. In order to reduce the starting torque, the second control device preferentially provides pressure to the power component to drive the vehicle forward.

[0046] Through step 201 to step 203, when the first control device fails or cannot be started at low temperature, the transmission cannot work under certain probability of failure. By adding a spare second control device, even if the first control device fails, the hydraulic system can still be maintained normally through the second control device, thereby improving the reliability of the entire transmission hydraulic system.

[0047] In one embodiment, the hydraulic system also includes a solenoid valve, which is respectively connected to the first oil circuit and the fourth oil circuit, one end of the fourth oil circuit is connected to the heat-generating component, and the solenoid valve includes: a state in which the first oil circuit and the fourth oil circuit are connected, and a second state in which the first oil circuit and the fourth oil circuit are not connected to each other.

[0048] In this embodiment, after controlling the first control device to connect the first oil circuit and the second oil circuit, and allowing the hydraulic oil to be delivered to the power component through the first oil circuit and the hydraulic oil to be delivered to the heat-generating component through the second oil circuit, it also includes: receiving the control power of the first control device; when the control power is greater than a preset power threshold, controlling the solenoid valve to connect the first oil circuit and the fourth oil circuit, so that the hydraulic oil is delivered to the heat-generating component through the fourth oil circuit.

[0049] Specifically, Figure 3 As shown, Figure 3 The system includes: a first control device 110, a second control device 120, a power component 130, a heating component 140 and a solenoid valve 150. The first control device 110 and the second control device 120 are connected in parallel. The first control device 110 provides driving oil pressure to the power component 130 along the first oil circuit L1 by absorbing hydraulic oil. The first control device 110 provides cooling lubricating oil pressure to the heating component 140 along the second oil circuit L2 by absorbing hydraulic oil; the second control device 120 provides driving oil pressure to the power component 130 along the third oil circuit L3 by absorbing hydraulic oil. The solenoid valve 150 controls the switch of the fourth oil circuit L4, so that the first control device 110 inputs hydraulic oil to the heating component 140 through the fourth oil circuit L4, and supplements the cooling of the heating component 140 on the basis of the second oil circuit.

[0050] In one embodiment, after controlling the first control device to connect the first oil circuit and the second oil circuit, and allowing the hydraulic oil to be delivered to the power component through the first oil circuit and the hydraulic oil to be delivered to the heat-generating component through the second oil circuit, it also includes: receiving the control power of the first control device; when the control power is greater than a preset power threshold, controlling the solenoid valve to connect the first oil circuit and the fourth oil circuit, so that the hydraulic oil is delivered to the heat-generating component through the fourth oil circuit.

[0051] In this embodiment, the hydraulic system also includes a solenoid valve, which is respectively connected to the first oil circuit and the fourth oil circuit, one end of the fourth oil circuit is connected to the heat-generating component, and the solenoid valve includes: a state in which the first oil circuit and the fourth oil circuit are connected, and a second state in which the first oil circuit and the fourth oil circuit are not connected to each other.

[0052] Optionally, the first state of the switch valve is: the state control valve is in the left position, the valve core of the switch conducts the fourth oil circuit, and the first oil pump is connected to the fourth oil circuit by controlling the switch valve. The second state of the switch valve is: the switch valve is in the right position, that is, the valve core of the switch blocks the fourth oil circuit, resulting in the first oil pump being disconnected from the fourth oil circuit.

[0053] In one embodiment, after controlling the first control device to conduct the first oil circuit and the second oil circuit, and delivering the hydraulic oil to the power component through the first oil circuit and the hydraulic oil to the heating component through the second oil circuit, it also includes: receiving the control power of the first control device; when the control power is greater than the preset power threshold, controlling the solenoid valve to conduct the first oil circuit and the fourth oil circuit, so that the hydraulic oil is delivered to the heating component through the fourth oil circuit. When the system is subject to high power demand, the fourth oil circuit is started through the switch valve, and the first oil pump delivers the additional hydraulic oil to the heating component through the fourth oil circuit to ensure the efficient operation of the entire system.

[0054] In this embodiment, controlling the second control device to conduct the fourth oil circuit includes: controlling the switch valve to be in the first state to conduct the fourth oil circuit, and allowing the hydraulic oil to be delivered to the heat-generating component through the fourth oil circuit. By conducting the fourth oil circuit, the heat-generating component is further cooled, thereby reducing the load of the first control device.

[0055] In this embodiment, under normal circumstances, the first control device only uses the second oil circuit L2 to cool the heat-generating components. After the main oil pressure is established, the oil temperature in the first control device will rise rapidly, the control power of the first control system will increase, and the control power of the first control system will be monitored. When the control power of the first control device rises, in order to cool the vehicle system and to reduce the power of the first control device, the fourth oil circuit should be opened to cool the vehicle system and reduce the load.

[0056] Example 1 like Figure 4 As shown, according to a specific embodiment of the present application, a structural schematic diagram of a hydraulic system is provided. In this embodiment, the hydraulic system includes: an oil pump controller harness 210: responsible for connecting and transmitting control signals to the oil pump, and a drive motor assembly corresponding to the oil pump. A brushless motor assembly 220, the brushless motor assembly 220 is a double pump drive motor assembly, and the brushless motor assembly 200 is connected to the first oil pump 222 and the second oil pump 221 in a transmission manner. The second oil pump 221 is a lubricating oil pump, which provides lubricating oil pressure for the heating component by providing hydraulic oil. The first oil pump 222 is a high-pressure oil pump, and the first oil pump 222 provides the main oil pressure for the power component. The oil inlet 230: the inlet point of the oil pump, which is used to receive the hydraulic oil to be compressed for the oil pump. The high-pressure oil circuit 240: delivers the compressed hydraulic oil to various components of the engine. The low-pressure lubricating oil circuit outlet 250, the low-pressure lubricating oil circuit outlet 250 is a pipeline for the low-pressure lubricating oil to flow out from the first control device. The brushed motor assembly 260 can provide maximum torque at startup. The third oil pump 270: A high-pressure oil pump with a smaller displacement can reduce the load during startup. The brushed motor assembly 260 is connected to the third oil pump 270.

[0057] In this embodiment, the first control device is controlled to connect the first oil circuit and the second oil circuit, and the first control device is controlled to connect the first oil circuit and the second oil circuit, including: controlling the brushless motor assembly to provide transmission power to the first oil pump, and the first oil pump connects the first oil circuit after receiving the transmission power; after the oil pressure in the first oil circuit is stable, controlling the brushless motor assembly to provide transmission power to the second oil pump, and the second oil pump connects the second oil circuit after receiving the transmission power.

[0058] Among them, the first oil pump is a high-pressure oil pump for providing the main oil pressure, and the second oil pump is a lubricating oil pump for providing low oil pressure to the lubrication and cooling device. The second oil pump is mainly responsible for lubricating the shaft teeth and bearings, and cooling the motor assembly and the clutch. The first oil pump uses a high-pressure oil pump to provide the high pressure required for the clutch to engage, ensuring that it can transmit torque normally, and the second oil pump uses a low-pressure oil pump. The third oil pump uses a small-displacement brushed motor assembly oil pump to reduce the starting torque of the second control device, which can meet the low-power starting requirements. This embodiment adds a brushed motor assembly oil pump, which works in parallel with the electronic duplex pump in the hydraulic system topology. At the same time, the brushed motor assembly oil pump is cheaper than the brushless motor assembly.

[0059] In a specific application scenario, the user starts the vehicle, the control system receives the start command, and detects the current ambient temperature. The control system monitors the system temperature and ambient temperature, and compares the system temperature and ambient temperature with the preset temperature range to identify the low temperature environment condition. In this case, the controller decides not to start the first control device and enables the second control device. The second control device can meet the system requirements at low temperatures. The controller instead sends a command to the second control device to turn on the third circuit. The oil pump of the brush motor assembly in the third circuit starts with a lower power and successfully starts and runs in a low temperature environment. The controller receives a signal that the brush motor assembly is working normally. At this time, it is necessary to monitor the control power of the second control system. Since the load power of the brush motor assembly in the third circuit is small, when the control power is greater than the preset power, it is necessary to start the fourth circuit in time to reduce the control power of the system.

[0060] In this embodiment, under low temperature conditions, the third oil pump assembly of the second control device is turned on to establish the main oil pressure at the first time. This is because the third oil pump uses a brush-type motor assembly with a smaller displacement and a small load on the oil pump system, which can meet the low temperature starting requirements.

[0061] Example 2 like Figure 5 As shown, when the first control device is successfully running, the first control device is controlled to conduct the first oil circuit and the second oil circuit, so that the first operating state of the first control system needs to be monitored at all times, and the first control system is switched to the second control system in time, specifically including: Step 501: Receive a first operating status every preset period.

[0062] Step 502: When the first operating state does not meet the preset operating condition, receive the second operating state of the second control device.

[0063] Step 503: When the second operating state meets the preset operating condition, the first control device is switched to the second control device.

[0064] Step 504: when the second operating state does not meet the preset operating condition, repeatedly start the first control device.

[0065] Step 505: When the number of times that the first operating state does not meet the preset operating condition reaches a threshold number, a vehicle abnormality instruction is generated, and the vehicle abnormality instruction is used to instruct the first control device to stop working.

[0066] The above steps 501 to 505 are used to detect the operating state of the first control device in real time. When the first control device cannot operate, the second control device is started as a backup oil pump. When the second control device is started, it is necessary to receive the second operating state, which includes: oil pump starting state, liquid oil pressure, oil pump current, oil pump speed, and starting torque. The second operating state meets the preset operating conditions, including but not limited to: the oil pump starts normally, the liquid oil pressure meets the preset liquid oil pressure range, the oil pump current meets the rated range, the oil pump speed meets the rated speed, and the starting torque meets the rated torque range.

[0067] In a specific application scenario, after the second control device is turned on, the operating state of the second control device needs to be detected. After the second control device intervenes, the first operating state of the first control device is detected. When the first operating state meets the preset operating conditions, the vehicle can restore the second control device.

[0068] In this embodiment, by real-time detection of the first operating state of the first control device and the second operating state of the second control device, the switching of the first control device and the second control device is completed when the driver is not aware of it, so as to ensure the normal operation of the vehicle. At the same time, when the second control device is running, the system still tries to restore the first control device. If the first operating state is satisfied, the first control device is switched to normal mode. If both the first control device and the second control device fail, and after several attempts, when the number of attempts exceeds the preset number, they still cannot work normally, the system generates a vehicle abnormality instruction to instruct the system to stop working.

[0069] Example 3 In one embodiment, when the ambient temperature is not within the preset temperature range, after controlling the second control device to connect the third oil circuit, it includes: monitoring the main oil pressure of the power component, and when the main oil pressure meets the operating oil pressure state; controlling the first control device to connect the first oil circuit and the second oil circuit, and delivering the hydraulic oil to the power component through the first oil circuit, and delivering the hydraulic oil to the heat-generating component of the cooling and lubrication device through the second oil circuit.

[0070] In this embodiment, the vehicle is started when a low temperature environment is detected. At this time, the third oil circuit is connected through the second control device to establish the main oil pressure of the power component. When the main oil pressure meets the operating oil pressure state, the first control device is turned on to supply oil to the vehicle. Since the starting load of the second control device is small, after the second control device establishes the main oil pressure, the first control device is started to provide stable oil pressure for the vehicle.

[0071] In a second aspect, the present application provides a vehicle, such as Figure 1 As shown, the vehicle includes: a hydraulic system 100 , the hydraulic system includes a first control device 110 , a second control device 120 , a power component 130 and a heat generating component 140 .

[0072] The first control device 110 is used to control the switches of the first oil circuit L1 and the second oil circuit L2. The first oil circuit is connected to the power component, and the second oil circuit is connected to the heating component. The first control device 110 is also used to absorb hydraulic oil and transport the hydraulic oil to the power component through the first oil circuit, and transport the hydraulic oil to the heating component through the second oil circuit; the second control device 110 is used to control the switch of the third oil circuit to absorb hydraulic oil and transport the hydraulic oil to the power component through the third oil circuit; the power component 130 is used to provide driving pressure, and the heating component 140 is used to provide cooling and lubrication pressure; the first control device 110 is used to detect the first operating state of the first control device. When the first operating state of the first control device meets the preset operating conditions and the ambient temperature is within the preset temperature range, the first control device 110 is controlled to conduct the first oil circuit L1 and the second oil circuit L2, and the hydraulic oil is transported to the power component through the first oil circuit L1, and the hydraulic oil is transported to the heating component through the second oil circuit L2.

[0073] In one embodiment, the hydraulic system further includes a solenoid valve, which is connected to the first oil circuit and the fourth oil circuit respectively, and one end of the fourth oil circuit is connected to the heat-generating component. The solenoid valve includes: a state in which the first oil circuit and the fourth oil circuit are connected, and a second state in which the first oil circuit and the fourth oil circuit are not connected to each other. The solenoid valve 360 ​​is used to connect the first oil circuit L1 and the fourth oil circuit L4, so that the hydraulic oil is delivered to the heat-generating component through the fourth oil circuit L4 to supplement the cooling effect of the second oil circuit L2. When the system is subjected to high power demand, the fourth oil circuit is started by the switch valve to connect, and the additional hydraulic oil is delivered to the heat-generating component to provide cooling lubricating oil pressure to the heat-generating component, thereby ensuring the efficient operation of the entire system.

[0074] The second control device 120 is used to control the second control device 120 to open the third oil circuit L3 and deliver the hydraulic oil to the power component through the third oil circuit L3 when it is detected that the first operating state does not meet the preset operating conditions or the ambient temperature is not within the preset temperature range.

[0075] Please refer to Figure 6 , is a schematic diagram of the hardware structure of the electronic device 100 provided in the embodiment of the present application. Figure 6 As shown, the electronic device 100 may include a processor 30 and a memory 20. The memory 20 is used to store one or more computer programs 40. The one or more computer programs 40 are configured to be executed by the processor 30. The one or more computer programs 40 include instructions, and the above instructions can be used to implement the control method of the hydraulic system in the electronic device 100.

[0076] It is understandable that the structure shown in this embodiment does not constitute a specific limitation on the electronic device 100. In other embodiments, the electronic device 100 may include more or fewer components than shown, or combine or separate some components, or arrange the components differently.

[0077] The processor 30 may include one or more processing units, for example, the processor 30 may include an application processor (AP), a modem, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Different processing units may be independent devices or integrated into one or more processors.

[0078] The processor 30 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 30 is a cache memory. The memory may store instructions or data that the processor 30 has just used or circulated. If the processor 30 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 30, and thus improves the efficiency of the system.

[0079] In some embodiments, the processor 30 may include one or more interfaces. The interface may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a SIM interface, and / or a USB interface, etc.

[0080] In some embodiments, the memory 20 may include a high-speed random access memory and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0081] The present application also provides a power system, comprising: a drive motor assembly, a clutch and a hydraulic control system, wherein the hydraulic control system is configured as the control method of the hydraulic system described above.

[0082] Please refer to Figure 7 , is a schematic diagram of the structure of the power system provided in the embodiment of the present application. Figure 7 As shown, a power system includes a heat-generating component 310 and a power component 320. The heat-generating component 310 includes a bearing, a gear, and a cooling part of a motor assembly and a clutch. The power component 320 includes a plurality of clutches. Figure 7It also includes: a first control device 330 and a second control device 340, the first control device 330 includes: a brushless motor assembly, a first oil pump and a second oil pump. The second control device 340 includes a brushless motor assembly and a third oil pump. A suction filter 350 is used to input hydraulic oil into the first control device 330 and the second control device 340. The first control device provides driving oil pressure to the power component through the first oil circuit; the second control device provides cooling lubricating oil pressure to the heat-generating component through the second oil circuit; the second control device provides driving oil pressure to the power component through the third oil circuit. Figure 7 It also includes a solenoid valve 160 controlling the switch of the fourth oil circuit L4, so that the first control device 330 inputs the hydraulic oil to the heating component 310 through the fourth oil circuit L4, and supplements the cooling of the heating component 310 on the basis of the second oil circuit L2.

[0083] Figure 7 It also includes a first one-way valve 370, a second one-way valve 380 and a third one-way valve 390. The first one-way valve 370 is used to control the flow direction of the hydraulic oil in the fourth oil circuit L4, the second one-way valve 380 is used to control the flow direction of the hydraulic oil in the first oil circuit L1, and the third one-way valve 380 is used to control the flow direction of the hydraulic oil in the third oil circuit L3.

[0084] It should be noted that the power system also includes a controller and a temperature sensor. The controller is used to receive a vehicle start instruction, and the temperature sensor is used to detect the ambient temperature.

[0085] In a specific embodiment, when the user starts the vehicle, the vehicle controller receives the start instruction, starts to detect the first operating state of the first control device, the temperature sensor detects the current ambient temperature, the controller receives the first operating state of the first control device and the ambient temperature, when the ambient temperature is within the preset temperature range and the first operating state meets the preset conditions, the vehicle controller starts the first control device, and when the first control device is started, the first oil pump and the second oil pump are started at the same time, and the hydraulic system operates normally. When the first oil pump or the second oil pump fails, the first operating state does not meet the preset conditions; at this time, the first operating state is transmitted to the vehicle controller, and after receiving the first operating state, the vehicle controller issues an instruction to start the second control device; the second control device starts to work and maintains the normal operation of the hydraulic system; the vehicle operates according to the specified mode of the second control device to protect the driving safety of the vehicle.

[0086] In a specific embodiment, when the ambient temperature does not meet the preset temperature range, for example, a low temperature ambient condition is identified, the original first control device is not started, and the second control device is started. After the second control device establishes the main oil circuit, the first control device is started to restore the hydraulic oil supply.

[0087] The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application.

Claims

1. A control method for a hydraulic system, characterized in that: The hydraulic system includes a first control device, a second control device, a power component and a heat generating component; the first control device provides driving oil pressure to the power component through a first oil circuit; the second control device provides cooling lubricating oil pressure to the heat generating component through a second oil circuit; The second control device provides the driving oil pressure to the power component through a third oil circuit; The control method comprises: receiving an ambient temperature and a first operating state of the first control device; When it is detected that the first operating state meets the preset operating conditions and the ambient temperature is within a preset temperature range, the first control device is controlled to conduct the first oil circuit and the second oil circuit, and the hydraulic oil is delivered to the power component through the first oil circuit, and the hydraulic oil is delivered to the heat generating component through the second oil circuit; When it is detected that the first operating state does not meet the preset operating condition and / or the ambient temperature is not within the preset temperature range, the second control device is controlled to open the third oil circuit, and the hydraulic oil is delivered to the power component through the third oil circuit.

2. The method according to claim 1, characterized in that The first control device comprises: a first oil pump, a second oil pump and a brushless motor assembly; the first oil pump is connected to the input end of the first oil circuit, and the second oil pump is connected to the input end of the second oil circuit; the brushless motor assembly is respectively connected to the first oil pump and the second oil pump in a transmission manner; The controlling the first control device to conduct the first oil circuit and the second oil circuit comprises: Controlling the brushless motor assembly to provide transmission power to the first oil pump, and the first oil pump conducts the first oil circuit after receiving the transmission power; After the oil pressure of the first oil circuit is stabilized, the brushless motor assembly is controlled to provide transmission power to the second oil pump, and after receiving the transmission power, the second oil pump conducts the second oil circuit.

3. The method according to claim 1, characterized in that The hydraulic system also includes a solenoid valve, which is used to control the switch of the fourth oil circuit. One end of the fourth oil circuit is connected to the heat-generating component. The solenoid valve includes: a first state in which the first oil circuit and the fourth oil circuit are connected, and a second state in which the first oil circuit and the fourth oil circuit are not connected to each other.

4. The method according to claim 3, characterized in that After controlling the first control device to connect the first oil circuit and the second oil circuit, and allowing the hydraulic oil to be delivered to the power component through the first oil circuit and the hydraulic oil to be delivered to the heat generating component through the second oil circuit, the method further includes: receiving control power of the first control device; When the control power is greater than a preset power threshold, the solenoid valve is controlled to connect the first oil circuit and the fourth oil circuit, so that the hydraulic oil is delivered to the heat-generating component through the fourth oil circuit.

5. The method according to claim 1, characterized in that The second control device includes: a third oil pump and a brush motor assembly; The brushed motor assembly is used to provide transmission power to the third oil pump, so that the third oil pump delivers the hydraulic oil to the power component through the third oil circuit.

6. The method according to claim 1, characterized in that The controlling the first control device to conduct the first oil circuit and the second oil circuit comprises: receiving the first operating state at every preset period; receiving a second operating state of a second control device when the first operating state does not meet the preset operating condition; When the second operating state satisfies the preset operating condition, switching the first control device to the second control device; When the second operating state does not satisfy the preset operating condition, repeatedly starting the first control device; When the number of times that the first operating state does not meet the preset operating condition reaches a threshold number, the first control device is instructed to stop working.

7. The method according to claim 1, characterized in that When the ambient temperature is not within the preset temperature range, after controlling the second control device to conduct the third oil circuit, the method includes: monitoring the main oil pressure of the power component, when the main oil pressure meets the operating oil pressure state; The first control device is controlled to connect the first oil circuit and the second oil circuit, and the hydraulic oil is delivered to the power component through the first oil circuit, and the hydraulic oil is delivered to the heat generating component through the second oil circuit.

8. A vehicle, characterized in that: include: A hydraulic system, the hydraulic system comprising: a first control device, a second control device, a power component and a heating component; The first control device is used to control the supply of driving oil pressure to the power component through the first oil circuit; the second control device supplies cooling lubricating oil pressure to the heat generating component through the second oil circuit; the second control device supplies the driving oil pressure to the power component through the third oil circuit; The first control device is used to detect a first operating state of the first control device, and when the first operating state meets a preset operating condition and the ambient temperature is within a preset temperature range, control the first oil circuit and the second oil circuit to be connected, and the hydraulic oil is delivered to the power component through the first oil circuit, and the hydraulic oil is delivered to the heat generating component through the second oil circuit; The second control device is used to control the second control device to open the third oil circuit and transport the hydraulic oil to the power component through the third oil circuit when it is detected that the first operating state does not meet the preset operating conditions and / or the ambient temperature is not within the preset temperature range.

9. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory is used to store instructions, and the processor is used to call the instructions in the memory, so that the electronic device executes the control method of the hydraulic system according to any one of claims 1 to 7.

10. A power system, characterized in that: The power system includes: a drive motor assembly, a clutch and a hydraulic control system; Wherein, the hydraulic control system is configured as the control method of the hydraulic system according to any one of claims 1 to 7.

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