Powertrain, vehicle, and powertrain control method

Abstract

The present application provides a powertrain, a vehicle and a control method for the powertrain, the powertrain including a speed signal generator, a solenoid valve, a liquid pump, a plurality of liquid channels and a plurality of loads, each liquid channel including a channel inlet and at least one channel outlet, the outlet of the liquid pump is used to connect each channel inlet, and a channel outlet is used to output liquid to a load; the solenoid valve is used to connect one or more channel inlets and one or more channel outlets; the speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load, the target load is one of the multiple loads; the solenoid valve is used to adjust the flow rate output from one or more channel outlets to one or more loads based on the energy size of the electrical energy. The present application can control the flow direction of the liquid based on the speed of the target load, thereby reducing the energy consumption of the powertrain in conveying the liquid while meeting the liquid flow requirements of the load, and has strong applicability.

Description

Technical Field

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

[0002] When the car is in operation, the motor, gearbox and other loads in the powertrain will generate heat loss and dissipate outward, and the rotating parts inside the load will produce mutual friction, which will accelerate wear. To ensure stable operation, the powertrain is equipped with a liquid pump and liquid flow channel to transmit liquid to cool or lubricate the motor, gearbox and other loads.

[0003] Generally, when a car is in different working states, the cooling demand or lubrication demand of different loads is different. For example, when an electric car accelerates or climbs a slope, the rotor of the motor generates less heat and does not require too much coolant for cooling, but the gearbox and the stator of the motor generate significant heat and require more coolant for cooling. During operation, a conventional powertrain uses a high-power liquid pump to transport liquid to each part of each load such as the motor and gearbox to cool all places where heat may be generated, or to lubricate all parts that may wear, resulting in increased power consumption of the liquid pump. At the same time, excess liquid will also increase the agitation mechanical resistance of the load, thereby increasing energy consumption. Therefore, how to meet the cooling demand or lubrication demand of each load while reducing energy consumption is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0004] The present application provides a powertrain, a vehicle and a powertrain control method, which can control the flow direction of liquid based on the rotational speed of the load, thereby reducing the energy consumption of the powertrain in transporting liquid while meeting the liquid flow requirements of the load, and has strong applicability.

[0005] In the first aspect, the present application provides a powertrain, which includes a speed signal generator, a solenoid valve, a liquid pump, a plurality of liquid channels and a plurality of loads, each liquid channel includes a channel inlet and at least one channel outlet, the outlet of the liquid pump is used to connect each channel inlet, and a channel outlet is used to output liquid to a load; the solenoid valve is used to connect one or more channel inlets and one or more channel outlets; the speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load, and the target load is one of the multiple loads; the solenoid valve is used to adjust the flow rate of one or more channel outlets output to one or more loads based on the energy level of the electrical energy. In the present application, the powertrain connects at least one channel inlet and at least one channel outlet through the solenoid valve, and provides electrical energy to the solenoid valve based on the speed of the target load through the speed signal generator, so that the solenoid valve can adjust the flow rate of one or more channel outlets based on the energy level of the electrical energy provided by the speed signal generator, thereby controlling the liquid flow rate received by one or more loads in real time. Exemplarily, the powertrain can dynamically control the liquid flow rate of one or more flow channel outlets through a speed signal generator and a solenoid valve, so that the liquid flows to the load with cooling requirements and reduces the liquid delivery to the load with low cooling requirements, so as to meet the cooling requirements of the load while reducing the energy consumption of the powertrain in delivering the liquid, thereby improving the utilization efficiency of the liquid in the powertrain and reducing the energy consumption of the powertrain. It can be understood that the powertrain of the embodiment of the present application does not need to set up an additional controller to control the working state of the solenoid valve, which can reduce the transmission delay of the link and the complexity of the system, and realizes independent control of the solenoid valve, with a simple structure, easy to implement, and strong applicability.

[0006] In one possible implementation, the multiple loads include a first load, the multiple liquid flow channels include a first liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to a target load, and a second flow channel outlet for outputting liquid to the first load; a speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load; and the solenoid valve is used to adjust the flow rates of the first flow channel outlet and the second flow channel outlet to increase or decrease simultaneously based on the energy level of the electrical energy. In the present application, when the first liquid flow channel outputs liquid to the target load through the first flow channel outlet, and outputs liquid to the first load through the second flow channel outlet, the solenoid valve can quickly adjust the flow rates of the first flow channel outlet and the second flow channel outlet to increase or decrease simultaneously based on the energy level of the electrical energy provided by the speed signal generator, thereby realizing real-time passive control of the liquid flow rates of different flow channel outlets.

[0007] In a possible implementation, the multiple loads include a second load, the multiple liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load; a speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load; the solenoid valve is used to adjust the flow rate of the first flow channel outlet to increase so that the flow rate of the third flow channel outlet decreases, or adjust the flow rate of the first flow channel outlet to decrease so that the flow rate of the third flow channel outlet increases. In the present application, when the first liquid flow channel outputs liquid to the target load through the first flow channel outlet, and the second liquid flow channel outputs liquid to the second load through the third flow channel outlet, the solenoid valve can quickly adjust the first flow channel outlet to increase or decrease based on the energy level of the electrical energy provided by the speed signal generator, and increase or decrease the third flow channel outlet, thereby realizing real-time passive control of the liquid flow rates of different flow channel outlets.

[0008] In a possible implementation, the multiple loads include a second load, the multiple liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load; a speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load; the solenoid valve is used to adjust the flow rate of the third flow channel outlet to increase so that the flow rate of the first flow channel outlet is reduced, or to adjust the flow rate of the third flow channel outlet to decrease so that the flow rate of the first flow channel outlet is increased. In the present application, when the first liquid flow channel outputs liquid to the target load through the first flow channel outlet, and outputs liquid to the second load through the third flow channel outlet, the solenoid valve can quickly adjust the flow rate of the third flow channel outlet to increase or decrease based on the energy level of the electrical energy provided by the speed signal generator, and increase or decrease the first flow channel outlet, thereby realizing real-time passive control of the liquid flow rates of different flow channel outlets.

[0009] In a possible implementation, the powertrain further includes a signal amplifier, the input end of the signal amplifier is connected to the speed signal generator, and the output end of the signal amplifier is connected to the solenoid valve; the signal amplifier is used to amplify the output electric energy of the speed signal generator and provide the amplified electric energy to the solenoid valve. In the present application, the powertrain can provide the amplified electric energy of the speed signal generator to the solenoid valve by arranging the signal amplifier between the speed signal generator and the solenoid valve, thereby ensuring that the solenoid valve can stably switch the working state.

[0010] In one possible implementation, the speed signal generator is used to output electric energy based on the speed of the target load, the electric energy includes alternating current or direct current, and the energy of the electric energy is positively correlated with the speed of the target load, and the energy of the electric energy includes the frequency of alternating current, the amplitude of alternating current or the current of direct current, and the voltage of direct current. In the present application, the electric energy output by the speed signal generator includes alternating current or direct current, and has rich application scenarios and strong applicability.

[0011] In one possible implementation, the speed signal generator includes a speed sensing module and a frequency conversion module, the input end of the frequency conversion module is connected to the speed sensing module, and the output end of the frequency conversion module is connected to the solenoid valve; the speed sensing module is used to output alternating current based on the speed of the target load; the frequency conversion module is used to provide the solenoid valve with alternating current with a frequency within a target frequency range based on the alternating current output by the speed sensing module, and the amplitude of the alternating current within the target frequency range is positively correlated with the speed of the target load. In the present application, the speed signal generator provides the solenoid valve with alternating current with a frequency within the target frequency range through the speed sensing module and the frequency conversion module, so that the solenoid valve switches the working state or keeps the working state unchanged based on the amplitude of the alternating current, thereby controlling the flow direction of the liquid. The implementation principle is simple and the applicability is strong.

[0012] In a possible implementation, the speed signal generator includes a speed sensing module and a rectifier module, the input end of the rectifier module is connected to the speed sensing module, and the output end of the rectifier module is connected to the solenoid valve; the speed sensing module is used to output AC power based on the speed of the target load; the rectifier module is used to provide DC power to the solenoid valve based on the AC power output by the speed sensing module, and the current or voltage of the DC power is positively correlated with the speed of the target load. In the present application, the speed signal generator provides DC power to the solenoid valve through the speed sensing module and the rectifier module, so that the solenoid valve switches the working state or keeps the working state unchanged based on the voltage or current of the DC power, thereby controlling the flow direction of the liquid, and the implementation principle is simple and the applicability is strong.

[0013] In a possible implementation, the energy of the electric energy is the frequency of the alternating current; the solenoid valve is used to switch the working state when the frequency of the electric energy is within the target frequency interval, and to maintain the state when the frequency of the electric energy is outside the target frequency interval. In the present application, when the speed signal generator provides alternating current to the solenoid valve, the solenoid valve can switch the working state or maintain the working state based on the frequency of the alternating current, thereby controlling the flow direction of the liquid. The control method is simple and easy to implement.

[0014] In one possible implementation, the energy of the electric energy includes the frequency and amplitude of the alternating current; the solenoid valve is used to switch the working state when the frequency of the electric energy is within the target frequency range and the amplitude of the electric energy is greater than or equal to the amplitude threshold, and to maintain the state when the frequency of the electric energy is outside the target frequency range and / or the amplitude of the electric energy is less than the amplitude threshold. In the present application, when the speed signal generator provides alternating current to the solenoid valve, the solenoid valve can switch the working state or maintain the working state based on the frequency and amplitude of the alternating current and the amplitude threshold, thereby controlling the flow direction of the liquid. The control method is simple and easy to implement.

[0015] In a possible implementation, the energy of the electric energy includes the voltage or current of the direct current, and the solenoid valve is used to switch the working state when the voltage or current of the electric energy is greater than or equal to the direct current threshold, and to keep the state unchanged when the voltage or current of the electric energy is less than the direct current threshold. In the present application, when the speed signal generator provides direct current to the solenoid valve, the solenoid valve can switch the working state or keep the working state unchanged based on the voltage or current of the direct current and the size of the direct current threshold, thereby controlling the flow direction of the liquid, and the control method is simple and easy to implement.

[0016] In a second aspect, the present application further provides a vehicle, comprising wheels and a powertrain as described in the first aspect, wherein the powertrain is used to drive the wheels.

[0017] In the third aspect, the present application also provides a control method for a powertrain, which powertrain includes a speed signal generator, a solenoid valve, a liquid pump, multiple liquid flow channels and multiple loads, each liquid flow channel includes a flow channel inlet and at least one flow channel outlet, the outlet of the liquid pump is used to connect each flow channel inlet, and one flow channel outlet is used to output liquid to a load; the solenoid valve is used to connect one or more flow channel inlets and one or more flow channel outlets, and the control method includes: providing electrical energy to the solenoid valve based on the speed of the target load through the speed signal generator, the target load is one of the multiple loads; adjusting the flow rate output to one or more loads from one or more flow channel outlets based on the energy size of the electrical energy through the solenoid valve.

[0018] In one possible implementation, the multiple loads include a first load, the multiple liquid flow channels include a first liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and a second flow channel outlet for outputting liquid to the first load, and the control method further includes: providing electrical energy to the solenoid valve based on the rotational speed of the target load through a speed signal generator; and adjusting the flow rates of the first flow channel outlet and the second flow channel outlet to increase or decrease the flow rates at the same time based on the energy level of the electrical energy through the solenoid valve.

[0019] In one possible implementation, the multiple loads include a second load, the multiple liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load, and the control method further includes: providing electrical energy to the solenoid valve based on the rotational speed of the target load through a speed signal generator; adjusting the flow rate of the first flow channel outlet based on the energy size of the electrical energy through the solenoid valve to increase the flow rate of the third flow channel outlet so as to decrease the flow rate of the third flow channel outlet, or adjusting the flow rate of the first flow channel outlet to decrease so as to increase the flow rate of the third flow channel outlet.

[0020] In one possible implementation, the multiple loads include a second load, the multiple liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load, and the control method further includes: providing electrical energy to the solenoid valve based on the rotational speed of the target load through a speed signal generator; adjusting the flow rate of the third flow channel outlet based on the energy size of the electrical energy through the solenoid valve to increase the flow rate of the first flow channel outlet so as to reduce the flow rate of the first flow channel outlet, or adjusting the flow rate of the third flow channel outlet to decrease so as to increase the flow rate of the first flow channel outlet.

[0021] In one possible implementation, the powertrain also includes a signal amplifier, the input end of the signal amplifier is connected to the speed signal generator, and the output end of the signal amplifier is connected to the solenoid valve. The method also includes: amplifying the output electrical energy of the speed signal generator through the signal amplifier, and providing the amplified electrical energy to the solenoid valve.

[0022] In one possible implementation, electric energy is provided to the solenoid valve based on the speed of the target load through a speed signal generator, including: outputting electric energy based on the speed of the target load through the speed signal generator, the electric energy includes alternating current or direct current, and the energy level of the electric energy is positively correlated with the speed of the target load, and the energy level of the electric energy includes the frequency level of alternating current, the amplitude level of alternating current or the current level of direct current, and the voltage level of direct current.

[0023] In one possible implementation, the speed signal generator includes a speed sensing module and a frequency conversion module, the input end of the frequency conversion module is connected to the speed sensing module, and the output end of the frequency conversion module is connected to the solenoid valve; the speed signal generator provides electric energy to the solenoid valve based on the speed of the target load, including: outputting alternating current based on the speed of the target load through the speed sensing module; providing alternating current with a frequency within a target frequency range to the solenoid valve based on the alternating current output by the speed sensing module through the frequency conversion module, and the amplitude of the alternating current within the target frequency range is positively correlated with the speed of the target load.

[0024] In one possible implementation, the speed signal generator includes a speed sensing module and a rectifier module, the input end of the rectifier module is connected to the speed sensing module, and the output end of the rectifier module is connected to the solenoid valve; the speed signal generator provides electric energy to the solenoid valve based on the speed of the target load, including: outputting alternating current based on the speed of the target load through the speed sensing module; providing direct current to the solenoid valve based on the alternating current output by the speed sensing module through the rectifier module, and the current or voltage of the direct current is positively correlated with the speed of the target load.

[0025] In one possible implementation, the energy of the electric energy is the frequency of the alternating current; the solenoid valve is used to maintain a state unchanged or switch the working state based on the energy of the electric energy to control the flow direction of the liquid, including: switching the working state when the frequency of the electric energy is within a target frequency range through the solenoid valve, and maintaining the state unchanged when the frequency of the electric energy is outside the target frequency range.

[0026] In one possible implementation, the energy of the electric energy includes the frequency and amplitude of the alternating current; a solenoid valve is used to maintain a state unchanged or switch a working state based on the energy of the electric energy to control the flow direction of the liquid, including: switching the working state through the solenoid valve when the frequency of the electric energy is within a target frequency range and the amplitude of the electric energy is greater than or equal to an amplitude threshold, and maintaining the state unchanged when the frequency of the electric energy is outside the target frequency range and / or the amplitude of the electric energy is less than the amplitude threshold.

[0027] In one possible implementation, the energy size of the electric energy includes the voltage size or current size of direct current; the solenoid valve is used to maintain a state unchanged or switch the working state based on the energy size of the electric energy to control the flow direction of the liquid, including: switching the working state through the solenoid valve when the voltage size or current size of the electric energy is greater than or equal to the DC threshold, and maintaining the state unchanged when the voltage size or current size of the electric energy is less than the DC threshold.

[0028] It should be understood that the implementation and beneficial effects of the above-mentioned aspects of the present application can be referenced to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of a powertrain provided in an embodiment of the present application;

[0031] Figure 3 Another schematic diagram of the powertrain provided in the embodiment of the present application;

[0032] Figure 4Another schematic diagram of a powertrain provided in an embodiment of the present application;

[0033] Figure 5 Another schematic diagram of a powertrain provided in an embodiment of the present application;

[0034] Figure 6 Another schematic diagram of a powertrain provided in an embodiment of the present application;

[0035] Figure 7 Another schematic diagram of a powertrain provided in an embodiment of the present application;

[0036] Figure 8 Another schematic diagram of a powertrain provided in an embodiment of the present application;

[0037] Fig. 9 Another schematic diagram of a powertrain provided in an embodiment of the present application;

[0038] Fig.10a A schematic diagram of an application scenario of the rotation speed sensing module provided in an embodiment of the present application;

[0039] Fig.10b A schematic diagram of another application scenario of the rotation speed sensing module provided in an embodiment of the present application;

[0040] Fig.10c A schematic diagram of another application scenario of the rotation speed sensing module provided in an embodiment of the present application;

[0041] Fig.11 A waveform diagram provided for an embodiment of the present application;

[0042] Fig.12 Another waveform diagram provided for an embodiment of the present application;

[0043] Fig.13 Another waveform diagram provided for an embodiment of the present application;

[0044] Fig.14 A schematic flow chart of a method for controlling a powertrain provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The powertrain provided in the embodiment of the present application is suitable for different vehicles, such as electric vehicles, hybrid vehicles, fuel vehicles, etc. Each load of the vehicle will generate heat loss and dissipate it outward during operation. The vehicle delivers cooling liquid to the heat-generating load through the liquid pump and liquid flow channel in the powertrain, which can dissipate the heat generated by the load in time, so that the load works under a suitable temperature state and ensures the stable operation of the vehicle. In addition, when each load is running, the transmission parts in the load make high-speed relative motion under a very small gap, such as the piston, piston ring and cylinder wall, rotating shaft and gear in the engine, etc., and friction will be generated on the surface of the parts, thereby accelerating wear. For this reason, the vehicle delivers lubricating liquid to the load through the powertrain, which can reduce the friction resistance between the parts, reduce power consumption, and reduce the wear of the parts, so as to achieve the purpose of improving the working reliability and durability of the load. The types of liquids transmitted in the powertrain include water, methanol, ethanol, ethylene glycol, propylene glycol or other liquid media, which are not limited by the embodiment of the present application.

[0046] In some feasible implementations, the powertrain uses a high-power liquid pump to deliver liquid to each load, so that each load can obtain sufficient liquid for cooling or lubrication. However, when the vehicle is in different working states, the cooling requirements of different loads are different, that is, the liquid flow rate required for cooling different loads is different. If the powertrain provides a large amount of liquid for cooling all loads that may generate heat, it will increase the power consumption of the liquid pump. At the same time, the excess liquid will also increase the stirring mechanical resistance when the load is running, thereby increasing energy consumption. Similarly, when the vehicle is in different working states, the lubrication requirements of different loads will also be different. The powertrain only increases the power of the liquid pump to ensure that each load can obtain a large amount of lubricating liquid, which will increase the energy consumption of the vehicle.

[0047] In this regard, when the powertrain provided by the embodiment of the present application is used in different vehicles, the liquid flow rate output from one or more flow channel outlets can be adjusted to dynamically control the flow direction of the liquid, so that the liquid can flow to the load with cooling or lubrication requirements, and reduce the supply of liquid to the load with low cooling or lubrication requirements, thereby meeting the liquid flow requirements of the load, that is, the cooling or lubrication requirements, while reducing the energy consumption of the powertrain to transport the liquid, and the applicability is strong. For ease of explanation, the following content is explained by taking the liquid transmitted in the powertrain as cooling liquid as an example.

[0048] For example, see Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. Figure 1The vehicle shown includes a powertrain 10, a frame 20, a power battery 30 and wheels 40. The powertrain 10 and the power battery 30 are fixed to the frame 20. The power battery 30 is electrically connected to various functional structural components inside the electric vehicle and can provide power for normal operation of various functional structural components inside the vehicle. The powertrain 10 is used to receive power from the power battery 30 and to drive the wheels 40. The vehicle in the embodiment of the present application refers to a wheeled device driven or towed by a power device.

[0049] The structure of the above powertrain can be found in Figure 2 As shown, Figure 2 A schematic diagram of the structure of a powertrain provided in an embodiment of the present application. Figure 2 The powertrain shown includes a reducer, a generator and an electric motor. The electric motor and the reducer are in driving connection. The electric motor is used to generate driving torque and output power as a power source of the powertrain. The electric motor transmits the output power to the wheels through the reducer to drive the vehicle.

[0050] Specifically, the above-mentioned motor includes a stator, a rotor and a motor shaft. The stator is coaxially sleeved on the periphery of the rotor and fixed relative to the housing of the motor. The motor shaft of the motor is coaxially fixed to the rotor. The rotor rotates around its own axis and synchronously drives the motor shaft to rotate, so as to output power through the motor shaft. The above-mentioned reducer includes a plurality of gears and a plurality of rotating shafts, and the plurality of rotating shafts are arranged in parallel and at intervals. The plurality of gears are used to realize the transmission connection between the plurality of rotating shafts, so as to be able to transmit the power input by the motor and output it to the wheels. Among them, the plurality of rotating shafts of the reducer can specifically include an input shaft, an intermediate shaft and an output shaft, and the input shaft, the intermediate shaft and the output shaft are arranged in parallel and at intervals. The input shaft is used for transmission connection with the motor shaft of the motor, and the intermediate shaft is used for transmission connection with the output shaft through at least one gear. The peripheries of the input shaft, the intermediate shaft and the output shaft are respectively coaxially sleeved with at least one gear. The at least one gear sleeved on each rotating shaft is meshed with each other to realize the effect of transmission connection between the intermediate shaft and the input shaft and the output shaft.

[0051] It should be noted that a transmission mechanism for realizing other functions may be provided between the reducer and the wheels, such as but not limited to a transmission mechanism such as a differential, so as to realize different power transmission effects between the reducer and the wheels and meet different driving conditions and requirements of the vehicle.

[0052] Figure 2 The engine shown is connected to the generator in a transmission manner. The engine is used to provide power and transmit the power to the generator through a transmission mechanism between the engine and the generator, so that the kinetic energy is converted into electrical energy through the generator. Figure 2 The engines shown may include, but are not limited to, gasoline engines, diesel engines, and other types or fuels.

[0053] It should be noted that in Figure 1 and Figure 2 In the illustrated embodiment, only one possible functional structure in the vehicle and the powertrain provided in the embodiment of the present application and the possible structural shape, size, and arrangement position of each functional structure are used as examples for exemplary introduction, but the functional structural device inside the vehicle and the structural shape, size, and arrangement position of each functional structural device provided in the embodiment of the present application are not limited to this, nor are the functional structural device inside the powertrain provided in the embodiment of the present application and the structural shape, size, and arrangement position of each functional structural device limited to this. The structural shape, size, and arrangement position of the functional structural device inside the vehicle and the powertrain and each functional structural device can be adjusted according to actual design requirements and application scenarios, and the embodiment of the present application does not make specific limitations on this.

[0054] In some feasible embodiments, in order to cool the loads such as the generator, generator, reducer and engine in the powertrain, a liquid pump and a plurality of liquid flow channels are also provided in the powertrain. The outlet of the liquid pump is connected to the flow channel inlet of each liquid flow channel, and the liquid can be drawn from the liquid pool or other storage device and output to each liquid flow channel. Each liquid flow channel includes one or more flow channel outlets. The liquid flow channel outputs the liquid to the load through the flow channel outlet to cool the load. The powertrain also includes a solenoid valve, which connects one or more flow channel inlets with one or more flow channel outlets. The powertrain adjusts the liquid flow rate output from one or more flow channel outlets to one or more loads through the solenoid valve, thereby controlling the flow direction of the liquid. The liquid can flow to the load with cooling requirements, and reduce the supply of liquid to the load with cooling requirements, thereby meeting the cooling requirements of the load while reducing the energy consumption of the liquid transmission system powertrain in transporting liquid.

[0055] For example, see Figure 3 , Figure 3 Another schematic diagram of the framework of the powertrain provided in an embodiment of the present application. Figure 3The powertrain shown includes a liquid pump, multiple liquid channels, multiple loads and a solenoid valve SV. Among them, the liquid pump can extract liquid from a liquid pool or other storage device, and deliver it to load 1 through the first liquid channel, and deliver it to load 2 through the second liquid channel, and deliver it to load n through the nth liquid channel. Load 1, load 2 or load n can be loads such as the above-mentioned generator, generator, reducer and engine, or can also be the stator, rotor, shaft or gear of each of the above-mentioned loads. The solenoid valve SV is arranged on the first liquid channel, which is used to connect the channel inlet and the channel outlet of the first liquid channel. The solenoid valve SV is adjusted to different opening and closing degrees to change the liquid flow rate of the channel outlet of the first liquid channel. Among them, the opening and closing degree refers to the opening and closing degree of the solenoid valve, which is expressed in angle or percentage. When expressed in angle, 0 degrees means fully closed, 90 degrees means fully open, and the larger the degree, the higher the angle of opening and the greater the opening and closing degree. When expressed as a percentage, 0 degrees means fully closed, and 100% means fully open. The larger the percentage, the higher the opening angle will be and the greater the degree of opening and closing.

[0056] It can be understood that when the opening and closing degree of the solenoid valve SV increases, the liquid flow rate output by the liquid pump to the load 1 through the flow channel outlet of the first liquid flow channel increases. At the same time, since the first liquid flow channel is connected to the outlet of the liquid pump together with the second liquid flow channel and the nth liquid flow channel, when the liquid flow rate transmitted by the first liquid flow channel increases, the liquid pump delivers less liquid to the second liquid flow channel and the nth liquid flow channel, so that the liquid flow rate output from the flow channel outlet of the second liquid flow channel and the nth liquid flow channel decreases. When the opening and closing degree of the solenoid valve SV decreases, the liquid flow rate output from the flow channel outlet of the first liquid flow channel decreases. At the same time, the liquid pump delivers more liquid to the second liquid flow channel and the nth liquid flow channel, so that the liquid flow rate output from the flow channel outlet of the second liquid flow channel and the nth liquid flow channel increases. It can be seen that the powertrain increases or decreases the liquid flow rate output from the flow outlet of the first liquid flow channel to load 1 through the solenoid valve SV, and at the same time, the flow outlet of the second liquid flow channel output to load 2 and the flow outlet of the nth liquid flow channel output to load n can be reduced or increased with opposite trends, thereby controlling the direction in which the liquid pump delivers liquid.

[0057] Similarly, the second liquid flow channel or the nth liquid flow channel may also be provided with an electromagnetic valve, and the power assembly may control the liquid flow rate output from the flow channel outlet of the second liquid flow channel or the nth liquid flow channel to the load 2 or the load n through the electromagnetic valve. For specific implementation, please refer to Figure 3 As shown, the embodiments of the present application are not illustrated one by one here.

[0058] For some possible implementations, see Figure 4 , Figure 4Another schematic diagram of a powertrain provided in an embodiment of the present application. Figure 3 The powertrain shown differs in that Figure 4 In the power assembly shown, the solenoid valve SV is arranged on the first liquid flow channel and the second liquid flow channel, and can connect the flow channel inlet and the flow channel outlet of the first liquid flow channel, and can connect the flow channel inlet and the flow channel outlet of the second liquid flow channel. When the opening and closing degree of the solenoid valve SV is large, the liquid pump delivers more liquid to the first liquid flow channel and less liquid to the second liquid flow channel, then the liquid flow rate output from the flow channel outlet of the first liquid flow channel to load 1 is relatively large, and the liquid flow rate output from the flow channel outlet of the second liquid flow channel to load 2 is relatively small. When the opening and closing degree of the solenoid valve SV is small, the liquid pump delivers less liquid to the first liquid flow channel and more liquid to the second liquid flow channel, then the liquid flow rate output from the flow channel outlet of the first liquid flow channel to load 1 is relatively small, and the liquid flow rate output from the flow channel outlet of the second liquid flow channel to load 2 is relatively large. It can be seen from this, it can be seen from this, Figure 4 The powertrain shown adjusts the liquid flow rate output from the flow outlet of the first liquid flow channel to load 1 through the solenoid valve SV to increase or decrease, and at the same time, the flow outlet of the second liquid flow channel output to load 2 and the flow outlet of the nth liquid flow channel output to load n can be reduced or increased with opposite trends, thereby controlling the direction in which the liquid pump delivers the liquid.

[0059] For some possible implementations, see Figure 5 , Figure 5 Another schematic diagram of a powertrain provided in an embodiment of the present application. Figure 3 and Figure 4 The first liquid flow path shown is different in that Figure 5The first liquid flow channel shown includes two flow channel outlets. The first flow channel outlet of the first liquid flow channel can output liquid to load 3, and the second flow channel outlet of the first liquid flow channel can output liquid to load 1. The third flow channel outlet of the second liquid flow channel can output liquid to load 2, and the nth flow channel outlet of the nth liquid flow channel can output liquid to load n. The electromagnetic valve SV is arranged on the first liquid flow channel, and is used to connect the flow channel inlet of the first liquid flow channel and the first flow channel outlet and the second flow channel outlet. When the opening and closing degree of the electromagnetic valve SV increases, the liquid flow rate output by the liquid pump to load 3 through the first flow channel outlet of the first liquid flow channel increases, and the liquid flow rate output by the second flow channel outlet to load 1 also increases. At the same time, since the first liquid flow channel is connected to the outlet of the liquid pump together with the second liquid flow channel and the nth liquid flow channel, when the liquid flow rate transmitted by the first liquid flow channel increases, the liquid delivered by the liquid pump to the second liquid flow channel and the nth liquid flow channel is reduced, so that the liquid flow rate output by the third flow channel outlet and the nth flow channel outlet is reduced. When the opening and closing degree of the solenoid valve SV decreases, the liquid flow rate output from the outlet of the first liquid channel to the load 1 decreases, and the liquid flow rate output from the outlet of the second channel to the load 1 also decreases. At the same time, the liquid pump delivers more liquid to the second liquid channel and the nth liquid channel, so that the liquid flow rate output from the third channel outlet and the nth channel outlet increases. It can be seen that the powertrain can simultaneously adjust the liquid flow rate output from the first channel outlet to the load 3 and the liquid flow rate output from the second channel outlet to the load 1 through the solenoid valve SV, and at the same time, the liquid flow rate output from the third channel outlet to the load 2 and the liquid flow rate output from the nth channel outlet to the load n can be reduced or increased with opposite trends, thereby controlling the direction in which the liquid pump delivers the liquid.

[0060] It should be noted that the number of solenoid valves in the powertrain, the specific location of the solenoid valves, and the direction of liquid flow controlled by the solenoid valves can be adjusted according to the needs of the actual application scenario. Figure 3 , Figure 4 and Figure 5 Shown are examples only.

[0061] In some feasible implementations, the solenoid valve is composed of a valve body, a valve core, a coil and a spring. When the solenoid valve receives electrical energy, the coil is energized and generates a magnetic field acting on the valve core. The valve core is made of magnetic material and can move under the action of the magnetic field force to overcome the elastic force of the spring, so that the solenoid valve can adjust the opening and closing degree, thereby adjusting the flow rate of one or more flow channel outlets. When the coil is not energized, the magnetic field disappears, and the valve core returns to its original position under the elastic force of the spring. According to the different internal structures, the solenoid valve can be divided into a normally open solenoid valve and a normally closed solenoid valve. Among them, when the coil of the normally open solenoid valve is not energized, the valve core is in place, the fluid channel is open, and the solenoid valve maintains a conducting working state. On the contrary, when the coil of the normally open solenoid valve is energized, the valve core moves, the fluid channel is closed, and the solenoid valve switches from a conducting working state to a closed working state. When the coil of the normally closed solenoid valve is not energized, the valve core is in place, the fluid channel is closed, and the solenoid valve maintains a closed working state. On the contrary, when the coil of the normally closed solenoid valve is energized, the valve core moves, the fluid channel opens, and the solenoid valve switches from the closed state to the conducting working state.

[0062] It is understandable that the valve core needs to overcome the elastic force of the spring and move under the action of the magnetic field force in order for the solenoid valve to switch the working state, that is, adjust the opening and closing degree, and the magnitude of the magnetic field force on the valve core is positively correlated with the energy of the electric energy when the coil is energized. Specifically, when the electric energy flowing through the coil is small, the magnetic field generated by the coil is weak, and the magnetic field force on the valve core is not enough to overcome the elastic force of the spring to move, then the solenoid valve remains in the working state unchanged. When the electric energy flowing through the coil is large, the magnetic field force generated by the coil on the valve core enables the valve core to overcome the elastic force of the spring and move, and the solenoid valve switches the working state. It can be seen from this that the powertrain can provide the solenoid valve with electric energy of different energy levels to keep the solenoid valve in the working state unchanged or switch the working state, thereby adjusting the liquid flow output from one or more flow channel outlets. In other application scenarios, the solenoid valve can also be composed of other devices, and the above is only an example.

[0063] The power assembly provided in the embodiment of the present application provides electrical energy to the solenoid valve through the speed signal generator, so that the solenoid valve can maintain the working state unchanged or switch the working state based on the amount of electrical energy provided by the speed signal generator, thereby adjusting the liquid flow output from one or more flow channel outlets. For example, Figure 3 , Figure 4 or Figure 5 As shown, the powertrain further includes a speed signal generator SG, which can provide electrical energy to the solenoid valve SV to drive the solenoid valve SV to switch the working state or keep the working state unchanged.

[0064] It should be noted that the speed signal generator can provide electrical energy to the solenoid valve based on the speed of a load, and the energy of the electrical energy provided by the speed signal generator is positively correlated with the speed of the load. In other words, the greater the speed of the load, the greater the electrical energy provided by the speed signal generator to the solenoid valve. When the electrical energy received by the solenoid valve is large enough, the valve core in the solenoid valve overcomes the spring force and moves, causing the solenoid valve to switch its working state. Therefore, when the speed signal generator provides electrical energy to the solenoid valve based on the speed of a load, the higher speed of the load can cause the solenoid valve to switch its working state, otherwise the solenoid valve remains in its working state. In general, the powertrain can provide electrical energy to the solenoid valve based on the speed of the load through the speed signal generator to drive the solenoid valve to control the flow direction of the liquid.

[0065] From the above content, it can be seen that there are differences in cooling requirements between different loads. In order to deliver liquid to loads with cooling requirements and reduce the delivery of liquid to loads with low cooling requirements, so as to meet the cooling requirements of the loads and reduce the energy consumption of the liquid pump in delivering liquid, the powertrain can enable the speed signal generator to provide electrical energy to the solenoid valve based on the speed of the target load. Among them, the target load refers to one of the multiple loads. The target load rotates and has a certain speed during operation, and the speed of the target load can reflect the cooling requirements of the target load or other loads.

[0066] For example, in Figure 3 In the powertrain shown, assuming that the faster the speed of load 2 is, the more heat load 1 generates, that is, the higher the cooling demand of load 1 is, the speed of load 2 can reflect the cooling demand of load 1. At this time, the powertrain can use load 2 as the target load, and provide electric energy to the solenoid valve SV based on the speed of load 2 through the speed signal generator SG. When the speed of load 2 is higher, the load 1 generates more heat, and the speed signal generator SG provides more electric energy to the solenoid valve SV, until the solenoid valve SV switches the working state. At this time, the opening and closing degree of the solenoid valve SV increases, so that the liquid flow rate output from the flow channel outlet of the first liquid flow channel to the load 1 increases, thereby meeting the cooling demand of load 1. At the same time, the liquid flow rate output from the flow channel outlet of the second liquid flow channel to the load 2 is reduced. In addition, when the speed of load 2 is smaller, the load 1 generates less heat, and the speed signal generator SG provides less electric energy to the solenoid valve SV, so that the solenoid valve SV remains in the working state unchanged. At this time, the opening and closing degree of the solenoid valve SV can be 0, so that the liquid flow rate output from the outlet of the first liquid flow channel to the load 1 is 0, thereby reducing the energy consumption of the liquid pump in conveying liquid and reducing the mechanical resistance of stirring excess liquid by the load 1. At the same time, the liquid flow rate output from the outlet of the second liquid flow channel to the load 2 is increased.

[0067] Or, in Figure 3 In the powertrain shown, assuming that the faster the speed of load 1 is, the more heat load 1 generates, that is, the higher the cooling demand of load 1 is, the speed of load 1 can reflect the cooling demand of load 1. At this time, the powertrain can use load 1 as the target load and provide electrical energy to the solenoid valve SV based on the speed of load 1 through the speed signal generator SG.

[0068] For example, in Figure 4 In the powertrain shown, assuming that the faster the speed of load 1, the more heat load 1 generates, that is, the higher the cooling demand of load 1, the speed of load 1 can reflect the cooling demand of load 1. Similarly, the powertrain can take load 1 as the target load, and provide electrical energy to the solenoid valve SV based on the speed of load 1 through the speed signal generator SG, thereby reducing the energy consumption of the liquid pump to transport the liquid while meeting the cooling demand of load 1, and reducing the mechanical resistance of load 1 stirring the excess liquid. Alternatively, assuming that the faster the speed of load 2, the more heat load 1 generates, that is, the higher the cooling demand of load 1, the speed of load 2 can reflect the cooling demand of load 1. At this time, the powertrain can take load 2 as the target load, and provide electrical energy to the solenoid valve SV based on the speed of load 2 through the speed signal generator SG. The determination of the target load can be adjusted according to the needs of the actual application scenario, and the embodiments of the present application are not illustrated one by one here.

[0069] Similarly, in Figure 5 In the powertrain shown, assuming that the speed of load 1 can reflect the cooling requirement of load 1, the powertrain can use load 1 as the target load, and provide electric energy to the solenoid valve SV through the speed signal generator SG based on the speed of load 1. Alternatively, assuming that the speed of load 2 can reflect the cooling requirement of load 1, the powertrain can use load 2 as the target load, and provide electric energy to the solenoid valve SV through the speed signal generator SG based on the speed of load 2. The determination of the target load can be adjusted according to the needs of the actual application scenario, and the embodiments of the present application are not illustrated one by one here.

[0070] Understandably, Figure 3 , Figure 4 or Figure 5 The powertrain shown can control the liquid flow rate output from the flow channel outlets of the second liquid flow channel and the nth liquid flow channel based on the above content to control the liquid flow rate flowing to load 2 or load n, so as to ensure that the cooling requirements of load 2 or load n are met while reducing the energy consumption of the liquid pump in transporting the liquid and reducing the mechanical resistance of load 2 or load n in stirring excess liquid. The specific implementation principle can refer to the above specific implementation method, and the embodiments of the present application are not illustrated one by one here.

[0071] In general, the powertrain in the embodiment of the present application provides electrical energy to the solenoid valve based on the speed of the target load through the speed signal generator, so that the solenoid valve can switch the working state or keep the state unchanged based on the amount of electrical energy provided by the speed signal generator, so as to control the flow rate outputted to one or more loads by one or more flow channel outlets, thereby allowing the liquid to flow to the load with cooling requirements, and reducing the liquid delivery to the load with low cooling requirements, so as to reduce the energy consumption of the powertrain in delivering liquid while meeting the cooling requirements of the load, and at the same time reduce the mechanical resistance of the load stirring excess liquid. It can be understood that the powertrain in the embodiment of the present application does not need to set up an additional controller to control the working state of the solenoid valve, which can reduce the transmission delay of the link and the complexity of the system, and realize independent control of the solenoid valve, with a simple structure, easy to implement, and strong applicability.

[0072] In some feasible implementations, when the powertrain provided in the embodiments of the present application is applied in an electric vehicle, the powertrain can be as follows: Figure 6 As shown, Figure 6 Another schematic diagram of the framework of the powertrain provided in an embodiment of the present application. Figure 6 The powertrain shown includes a liquid pool, a liquid pump, a radiator, a first liquid flow channel, a stator and a rotor. The liquid pump can extract the liquid from the liquid pool or other storage device, and deliver it to the radiator through the first liquid flow channel, and then deliver it to the stator from the outlet of the second flow channel through the radiator, and output it to the rotor from the outlet of the first flow channel to cool the stator and rotor. The stator and rotor are two loads set in the motor of the electric vehicle, and the radiator can improve the cooling effect of the powertrain.

[0073] It should be noted that when electric vehicles are in different working states, the cooling requirements of the stator and rotor are different. For example, when the electric vehicle is accelerating or climbing a slope, the rotor speed is low, less heat is generated, and not much coolant is needed for cooling. However, the stator heats up significantly and needs more coolant for cooling. When the electric vehicle is driving fast, the motor's rotor speed is very high, and the rotor needs more coolant to reduce the pressure. In contrast, the stator does not need too much coolant for cooling. In order to control the flow direction of the liquid, Figure 6The powertrain shown also includes a solenoid valve SV. The solenoid valve SV is arranged on the first liquid flow channel between the radiator and the rotor, and is used to connect the flow channel inlet of the first liquid flow channel with the first flow channel outlet. When the solenoid valve SV is turned on, the liquid pump can simultaneously deliver liquid to the stator and the rotor through the radiator to cool the stator and the rotor. When the solenoid valve SV is turned off, the flow channel inlet of the first liquid flow channel is disconnected from the first flow channel outlet, the liquid flow output from the first flow channel outlet to the rotor is reduced to 0, and the liquid flow output from the second flow channel outlet to the stator is increased. It can be seen that the powertrain can switch the working state or keep the working state unchanged (for example, turned on or off) through the solenoid valve SV to adjust the flow rate of the first flow channel outlet and the second flow channel outlet, thereby controlling the flow direction of the liquid.

[0074] Furthermore, Figure 6 The powertrain shown also includes a speed signal generator SG. As can be seen from the above content, the speed of the rotor can reflect the cooling requirements of the stator and the rotor, so the powertrain can use the rotor as the target load and provide electrical energy to the solenoid valve SV based on the speed of the rotor through the speed signal generator SG. It can be understood that when the speed of the rotor is smaller, the speed signal generator SG provides less electrical energy to the solenoid valve SV. At this time, the cooling requirement of the rotor is low and the cooling requirement of the stator is high. The solenoid valve SV remains in the closed working state unchanged, thereby controlling the liquid pump to increase the flow rate of liquid delivered to the stator, which can meet the cooling requirement of the stator, while reducing the energy consumption of the liquid pump in delivering liquid and reducing the mechanical resistance of the rotor stirring excess liquid. When the speed of the rotor is higher, the speed signal generator SG provides more electrical energy to the solenoid valve SV. At this time, the cooling requirement of the rotor is high and the cooling requirement of the stator is low. The solenoid valve SV switches to the on working state, and the flow rate of the liquid output from the first flow channel outlet increases, thereby controlling the liquid pump to deliver liquid to the stator and rotor at the same time, ensuring the stable working temperature of the rotor and stator.

[0075] In some feasible implementations, when the powertrain provided in the embodiments of the present application is applied in an electric vehicle, the powertrain can also be as follows: Figure 7 As shown, Figure 7 Another schematic diagram of the framework of the powertrain provided in an embodiment of the present application. Figure 7The powertrain shown includes a liquid pool, a liquid pump, a radiator, a first liquid flow channel, a second liquid flow channel, a stator and a rotor. The liquid pump can extract liquid from the liquid pool or other storage devices, and output the liquid to the rotor through the third flow channel outlet i3 of the second liquid flow channel, and output the liquid to the stator through the fourth flow channel outlet i4 of the second liquid flow channel, so as to cool the stator and the rotor. Alternatively, the liquid pump can transport the liquid to the radiator through the first liquid flow channel, and then transport the liquid to the stator from the second flow channel outlet i2 through the radiator, and output the liquid to the rotor from the first flow channel outlet i1, so as to cool the stator and the rotor. The radiator can improve the cooling effect of the powertrain.

[0076] To adjust Figure 7 The liquid flow rate of multiple flow channel outlets, Figure 7 The powertrain shown also includes a solenoid valve SV1 and a solenoid valve SV2. The solenoid valve SV1 is arranged on the liquid flow channel between the radiator and the rotor, and is used to connect the flow channel inlet of the first liquid flow channel with the first flow channel outlet i1. The solenoid valve SV2 is arranged on the liquid flow channel between the liquid pump and the rotor and the stator, and is used to connect the flow channel inlet of the second liquid flow channel with the third flow channel outlet i3 and the fourth flow channel outlet i4. When the solenoid valve SV1 is turned on and the solenoid valve SV2 is turned off, the liquid pump can simultaneously deliver liquid to the stator and the rotor through the radiator and the first liquid flow channel to cool the stator and the rotor. When the solenoid valve SV1 is turned off and the solenoid valve SV2 is turned off, the liquid flow output from the first flow channel outlet i1 to the rotor is reduced to 0, and the liquid flow output from the second flow channel outlet i2 to the stator is increased. When the solenoid valve SV1 is turned off and the solenoid valve SV2 is turned on, the flow channel inlet of the first liquid flow channel is disconnected from the first flow channel outlet i1 and the second flow channel outlet i2, and the flow channel inlet of the second liquid flow channel is connected to the third flow channel outlet i3 and the fourth flow channel outlet i4, and the liquid pump can directly deliver liquid to the stator and rotor through the solenoid valve SV2.

[0077] It can be seen that the powertrain can change the liquid flow output to the load from multiple flow channel outlets by controlling the solenoid valve SV1 and the solenoid valve SV2 to switch the working state or keep the working state unchanged (for example, turn on or off or adjust the switch degree).

[0078] Furthermore, Figure 7 The powertrain shown also includes a speed signal generator SG1 and a speed signal generator SG2. As can be seen from the above, when the electric vehicle is in different working states, the cooling requirements of the stator and the rotor are different, and the speed of the rotor can reflect the cooling requirements of the stator and the rotor. The powertrain can use the rotor as the target load, and provide electrical energy to the solenoid valve SV1 based on the speed of the rotor through the speed signal generator SG1, and provide electrical energy to the solenoid valve SV2 based on the speed of the rotor through the speed signal generator SG2.

[0079] It is understandable that when the speed of the rotor is relatively low and the output torque of the motor reaches the maximum, the cooling demand of the rotor is low and the cooling demand of the stator is very high. At this time, the electric energy provided by the speed signal generator SG1 to the solenoid valve SV1 based on the speed of the rotor is relatively small, and the solenoid valve SV1 can maintain the closed working state unchanged, that is, the solenoid valve SV1 is a normally closed solenoid valve. At the same time, the electric energy provided by the speed signal generator SG2 to the solenoid valve SV2 based on the speed of the rotor is also relatively small, and the solenoid valve SV2 can maintain the conductive working state unchanged, that is, the solenoid valve SV2 is a normally open solenoid valve. Obviously, at this time, the liquid pump only transports liquid to the stator through the radiator, which can effectively cool the stator and reduce the energy consumption of the liquid pump in transporting liquid and the mechanical resistance of the rotor stirring excess liquid. When the speed of the rotor increases, the electric energy provided by the speed signal generator SG2 to the solenoid valve SV2 is relatively large, and the solenoid valve SV2 can be switched to the conductive working state, thereby controlling the liquid pump to directly transport liquid to the stator and rotor through the conductive solenoid valve SV2. At this time, the cooling requirements of the rotor and the stator are not high, and the liquid does not need to be dissipated through the radiator. While ensuring the stability of the operating temperature of the stator and rotor, the energy consumption of the electric vehicle can be reduced.

[0080] In addition, when the rotor speed is very high, the cooling requirement of the rotor is high while the cooling requirement of the stator is low. At this time, the speed signal generator SG1 provides a relatively large amount of electrical energy to the solenoid valve SV1 based on the rotor speed, and the solenoid valve SV1 can be switched to a conducting working state, so that the liquid pump can deliver liquid to the rotor through the radiator to effectively cool the rotor.

[0081] In some feasible implementations, when the powertrain provided in the embodiments of the present application is applied in an electric vehicle, the powertrain can also be as follows: Figure 8 As shown, Figure 8 Another schematic diagram of the framework of the powertrain provided in an embodiment of the present application. Figure 8 The powertrain shown includes a liquid pool, a liquid pump, a radiator, a first liquid flow channel, a second liquid flow channel, a third liquid flow channel, a reducer, a stator and a rotor. The liquid pump can extract liquid from the liquid pool or other storage devices, and directly deliver the liquid to the stator and the rotor through the second liquid flow channel to cool the stator and the rotor. Alternatively, the liquid pump can deliver the liquid to the stator and the rotor through the radiator and the first liquid flow channel, and the radiator can improve the cooling effect of the powertrain. At the same time, the liquid pump can deliver the liquid to the reducer through the third liquid flow channel to cool the reducer.

[0082] In order to adjust the liquid flow rate output from the outlet of each liquid flow channel, Figure 8The powertrain shown in the figure also includes a solenoid valve SV1, a solenoid valve SV2 and a solenoid valve SV3. The specific implementation of the solenoid valve SV1 and the solenoid valve SV2 can be referred to in the above Figure 7 The specific implementation shown in the embodiment of the present application will not be described in detail here. The solenoid valve SV3 is arranged on the third liquid flow channel between the liquid pump and the reducer. When the solenoid valve SV3 is turned on, the flow channel inlet of the third liquid flow channel is connected with the flow channel outlet, and the liquid pump can deliver liquid to the reducer to cool the reducer. Similarly, since the flow channel inlets of the first liquid flow channel, the second liquid flow channel and the third liquid flow channel are all connected to the outlet of the liquid pump, when the liquid transmitted by the first liquid flow channel and the second liquid flow channel increases, the flow rate output from the flow channel outlet of the third liquid flow channel to the reducer decreases, and vice versa.

[0083] Figure 8 The powertrain shown in the figure also includes a speed signal generator SG1, a speed signal generator SG2 and a speed signal generator SG3. The specific implementation of the speed signal generator SG1 and the speed signal generator SG2 can be found in the above Figure 7 The specific implementation shown in the examples of the present application will not be described in detail here. Furthermore, when the electric vehicle is in different working states, the cooling requirements of the reducer are different. For example, when the electric vehicle is accelerating or climbing, the speed of the reducer is relatively low and the maximum torque is output, the reducer heats up significantly, and more liquid is required for cooling. When the electric vehicle is traveling fast, the speed of the reducer is relatively high so that the oil mist in the casing is sufficient, and the powertrain can reduce the supply of cooling liquid. It can be seen from this that the speed of the reducer can reflect the cooling requirements of the reducer, then the powertrain can use the reducer as the target load, and can provide electrical energy to the solenoid valve SV3 based on the speed of the reducer through the speed signal generator SG3.

[0084] It is understandable that when the speed of the reducer is relatively low and the output torque reaches the maximum, the cooling requirement of the reducer is very high. At this time, the electric energy provided by the speed signal generator SG3 to the solenoid valve SV3 based on the speed of the reducer is relatively small, and the solenoid valve SV3 can maintain the working state of conduction unchanged, that is, the solenoid valve SV3 is a normally open solenoid valve. The flow channel inlet of the third liquid flow channel is connected to the flow channel outlet, and the liquid pump can transport liquid to the reducer to ensure the stability of the working temperature of the reducer. When the speed of the reducer is relatively high, the electric energy provided by the speed signal generator SG3 to the solenoid valve SV3 is relatively large, and the solenoid valve SV3 can be switched to the off working state, thereby reducing the flow rate of the flow channel outlet of the third liquid flow channel, controlling the liquid to no longer flow to the reducer, and reducing the energy consumption of the liquid pump in transporting the liquid and the mechanical resistance of the reducer stirring the excess liquid.

[0085] In some feasible implementations, when the powertrain provided in the embodiments of the present application is applied to a fuel vehicle, the powertrain can be as follows: Fig. 9 As shown, Fig. 9 Another schematic diagram of the framework of the powertrain provided in an embodiment of the present application. Fig. 9 The powertrain shown includes a liquid pool, a liquid pump, a radiator, a first liquid flow channel, a second liquid flow channel, a third liquid flow channel, a reducer and an engine. The liquid pump can extract liquid from the liquid pool or other storage devices, and directly deliver the liquid to the engine through the second liquid flow channel to cool the engine. Alternatively, the liquid pump can deliver the liquid to the engine through the radiator and the first liquid flow channel, and the radiator can improve the cooling effect of the powertrain. At the same time, the liquid pump can deliver the liquid to the reducer through the third liquid flow channel to cool the reducer.

[0086] Fig. 9 The powertrain shown also includes a solenoid valve SV1, a solenoid valve SV2, a solenoid valve SV3, a speed signal generator SG1, a speed signal generator SG2 and a speed signal generator SG3. It should be noted that: Fig. 9 The specific implementation of the powertrain shown can be found in the above Figure 7 , Figure 8 The specific implementation method shown in the embodiment of the present application will not be described in detail here.

[0087] In some feasible implementations, it can be seen from the above content that after the solenoid valve receives electrical energy, the valve core can generate a magnetic field force to overcome the spring force to move, so that the solenoid valve switches the working state, such as switching the opening and closing degree. In some application scenarios, the spring force of the solenoid valve is large, and the solenoid valve needs to obtain enough electrical energy to enable the valve core to overcome the spring force to move. The power assembly provided in the embodiment of the present application provides electrical energy to the solenoid valve through a speed signal generator, and the electrical energy provided by the speed signal generator may have an energy upper limit. In order to enable the solenoid valve to stably switch the working state, the power assembly may also include a signal amplifier. The input end of the signal amplifier is connected to the speed signal generator, and the output end of the signal amplifier is connected to the solenoid valve. The signal amplifier can amplify the output electrical energy of the speed signal generator and provide the amplified electrical energy to the solenoid valve. It can be understood that the power assembly amplifies the output electrical energy of the speed signal generator through the signal amplifier. When the spring force of the solenoid valve is large, the valve core in the solenoid valve can still overcome the spring force to move, ensuring that the solenoid valve can stably switch the working state.

[0088] In some feasible implementations, the signal amplifier may specifically include a driving power supply and a relay. The control end of the relay and the speed signal generator can receive the output electrical energy of the speed signal generator. When the energy of the speed signal generator output electrical energy is relatively large, the relay is turned on, otherwise the relay is turned off. At the same time, the relay is arranged between the driving power supply and the solenoid valve. When the relay is turned on, the driving power supply can provide driving electrical energy to the solenoid valve. The energy of the driving electrical energy is greater than the output electrical energy of the above-mentioned speed signal generator, which can make the solenoid valve switch the working state. When the relay is turned off, the driving power supply is disconnected from the solenoid valve, and the solenoid valve maintains the working state unchanged.

[0089] In general, when the powertrain provided by the embodiment of the present application is applied in a vehicle, at least one flow channel inlet and at least one flow channel outlet can be connected through a solenoid valve, and electrical energy can be provided to the solenoid valve based on the speed of the target load through a speed signal generator, so that the solenoid valve can adjust the flow of one or more flow channel outlets based on the amount of electrical energy provided by the speed signal generator, thereby controlling the liquid flow received by one or more loads in real time. Exemplarily, the powertrain can dynamically control the liquid flow of one or more flow channel outlets through a speed signal generator and a solenoid valve, so that the liquid flows to the load with cooling requirements, and reduces the liquid delivery to the load with low cooling requirements, so as to meet the cooling requirements of the load while reducing the energy consumption of the powertrain to deliver the liquid, thereby improving the utilization efficiency of the liquid in the powertrain and reducing the energy consumption of the powertrain. It can be understood that the powertrain of the embodiment of the present application does not need to set up an additional controller to control the working state of the solenoid valve, which can reduce the transmission delay of the link and the complexity of the system, and realizes independent control of the solenoid valve, with a simple structure, easy to implement, and strong applicability.

[0090] To facilitate understanding of the implementation principle of the speed signal generator in the embodiment of the present application, the following contents are combined with Figures 10a to 13 The working process of the speed signal generator is introduced.

[0091] In some optional embodiments, according to different driving modes, the solenoid valve can be divided into a DC solenoid valve and an AC solenoid valve, the DC solenoid valve is driven by DC power, and the AC solenoid valve is driven by AC power. When the solenoid valve in the powertrain is an AC solenoid valve, the speed signal generation module may include a speed sensing module. The speed sensing module can detect the speed of the target load and output an alternating current whose energy is positively correlated with the speed of the target load, and the alternating current is the output electric energy of the speed signal generator in the above content. Further, the speed sensing module is connected to the solenoid valve, and the output alternating current can be output to the solenoid valve, so that the solenoid valve switches the working state or keeps the working state unchanged based on the energy of the alternating current. It should be noted that the frequency and amplitude of the alternating current output by the speed sensing module based on the speed of the target load can represent the energy of the alternating current. Specifically, when the frequency and amplitude of the alternating current are larger, the energy of the alternating current is larger, and when the frequency and amplitude of the alternating current are smaller, the energy of the alternating current is smaller.

[0092] In some feasible implementations, the target load includes a rotating part, and the rotational speed of the rotating part can reflect the rotational speed of the target load. The greater the rotational speed of the rotating part, the greater the rotational speed of the target load, and vice versa. Therefore, the speed sensing module can generate an alternating current that is positively correlated with the rotational speed of the target load by detecting the rotational speed of the rotating part in the target load. Usually, the rotating parts in the target load include a rotating shaft or a gear, etc. For ease of explanation, the following content is illustrated by taking the rotating parts as the rotating shaft. The speed signal generator detects the rotational speed of the rotating shaft of the target load. When the rotational speed of the rotating shaft in the target load is greater, the rotational speed of the target load is greater, and the energy of the alternating current generated by the speed signal generator is also greater. On the contrary, when the rotational speed of the rotating shaft in the target load is smaller, the rotational speed of the target load is smaller, and the energy of the alternating current generated by the speed signal generator is also smaller.

[0093] For some possible implementations, see Fig.10a , Fig.10b and Fig.10c , Fig.10a A schematic diagram of an application scenario of the rotation speed sensing module provided in an embodiment of the present application, Fig.10b This is a schematic diagram of another application scenario of the rotation speed sensing module provided in an embodiment of the present application. Fig.10c This is another schematic diagram of an application scenario of the speed sensing module provided in the embodiment of the present application. Fig.10a In the application scenario shown, the rotating shaft of the target load is a spline shaft, that is, there is a longitudinal keyway on the outer cylindrical surface of the rotating shaft. When the rotating shaft rotates, the speed sensing module can generate an alternating current whose energy is positively correlated with the rotating speed of the rotating shaft based on the splines on the rotating shaft surface. Specifically, the speed sensing module can be a photoelectric speed sensor. Fig.10b In the application scenario shown, the shaft end of the target load is a polygonal shaft end. When the shaft rotates, the speed sensing module can sense the rotation of the polygonal shaft end and generate alternating current whose energy is positively correlated with the speed of the shaft. Specifically, the speed sensing module can be a photoelectric speed sensor. Fig.10c In the application scenario shown, a magnet is disposed on the rotating shaft of the target load. When the rotating shaft rotates, the magnet on the rotating shaft will affect the magnetic field change of the speed sensing module, so that the speed sensing module can generate alternating current whose energy is positively correlated with the speed of the rotating shaft. Specifically, the speed sensing module can be a Hall effect speed sensor or a magnetoelectric speed sensor, etc.

[0094] Understandably, Fig.10a , Fig.10b and Fig.10c The rotation speed sensing module shown is only an example. The rotation speed sensing module provided in the embodiment of the present application may also be other devices that can generate alternating current based on the rotation speed of a rotating object. The embodiment of the present application will not illustrate each of them one by one here.

[0095] In some feasible implementations, the solenoid valve can switch its working state when receiving AC power with a frequency within a target frequency range, and keep its working state unchanged when receiving AC power with a frequency outside the target frequency range. The target frequency range can be obtained by the operating frequency of the solenoid valve. Specifically, the change of the working state of the solenoid valve when receiving AC power can be referred to Fig.11 As shown, Fig.11 A waveform diagram provided for an embodiment of the present application.

[0096] like Fig.11 As shown, when the speed of the target load detected by the speed sensing module is relatively low, the frequency and amplitude of the alternating current output by the speed sensing module will be relatively small, that is, the electrical energy of the alternating current output by the speed sensing module is relatively small. If the frequency of the alternating current output by the speed sensing module to the solenoid valve is less than the target frequency interval at this time, the solenoid valve remains in the working state unchanged. When the speed of the target load detected by the speed sensing module increases, the frequency and amplitude of the alternating current output by the speed sensing module will increase, that is, the electrical energy of the alternating current output by the speed sensing module will increase. If the frequency of the alternating current output by the speed sensing module to the solenoid valve is within the target frequency interval at this time, the solenoid valve can switch the working state. When the speed of the target load detected by the speed sensing module is relatively high, the frequency and amplitude of the alternating current output by the speed sensing module will be relatively large, that is, the electrical energy of the alternating current output by the speed sensing module is relatively large. If the frequency of the alternating current output by the speed sensing module to the solenoid valve is greater than the target frequency interval at this time, the solenoid valve remains in the working state unchanged.

[0097] In general, the speed signal generator in the embodiment of the present application can provide alternating current to the solenoid valve based on the speed of the target load through the speed sensing module, so that the solenoid valve maintains the working state unchanged or switches the working state based on the frequency of the received alternating current, and the frequency of the alternating current received by the solenoid valve is positively correlated with the speed of the target load.

[0098] In some optional embodiments, when the solenoid valve in the powertrain is an AC solenoid valve, the speed signal generating module may include a speed sensing module and a frequency conversion module. The input end of the frequency conversion module is connected to the speed sensing module, and the output end of the frequency conversion module is connected to the solenoid valve. The speed sensing module can detect the speed of the target load and output an alternating current whose energy is positively correlated with the speed of the target load. The alternating current is the output electrical energy of the speed signal generator in the above content. Specifically, the specific implementation method of the speed sensing module can refer to the above Fig.10a , Fig.10b and Fig.10c The specific implementation method shown in the embodiment of the present application will not be described in detail here.

[0099] Furthermore, the frequency conversion module can convert the frequency of the alternating current output by the speed sensing module to output alternating current with a frequency within the target frequency range to the solenoid valve. It should be noted that the amplitude of the alternating current output by the frequency conversion module is positively correlated with the speed of the target load. Specifically, when the speed of the target load is higher, the amplitude of the alternating current output by the frequency conversion module is larger, that is, the energy of the alternating current is larger; when the speed of the target load is lower, the amplitude of the alternating current output by the frequency conversion module is smaller, that is, the energy of the alternating current is smaller.

[0100] In some feasible implementations, the solenoid valve can switch its working state when it receives alternating current with a frequency within a target frequency interval and an amplitude greater than or equal to an amplitude threshold, or keep its working state when it receives alternating current with a frequency outside the target frequency interval, or keep its working state when it receives alternating current with a frequency within the target frequency interval and an amplitude less than an amplitude threshold. The target frequency interval can be obtained by the operating frequency of the solenoid valve, and the amplitude threshold refers to the minimum value of the amplitude of the alternating current that can cause the solenoid valve to switch its working state when the solenoid valve receives alternating current with a frequency within the target frequency interval. That is, when the solenoid valve receives alternating current with a frequency within the target frequency interval and an amplitude greater than or equal to the amplitude threshold, the valve core of the solenoid valve can overcome the spring force and move. Specifically, the change in the working state of the solenoid valve when it receives alternating current can be referred to. Fig.12 As shown, Fig.12 Another waveform diagram provided for an embodiment of the present application.

[0101] like Fig.12 As shown, when the speed of the target load detected by the speed sensing module is relatively low, the amplitude and frequency of the alternating current output by the speed sensing module will be relatively small, and the amplitude of the alternating current output after passing through the frequency conversion module will also be relatively small, that is, the electric energy of the alternating current output by the frequency conversion module is relatively small, and the frequency of the alternating current output by the frequency conversion module is within the target frequency range. If the amplitude of the alternating current received by the solenoid valve is less than the amplitude threshold at this time, it can be seen from the above content that the valve core of the solenoid valve does not move, and the solenoid valve remains in the working state unchanged. When the speed of the target load detected by the speed sensing module increases, the amplitude of the alternating current output by the frequency conversion module increases, that is, the electric energy of the alternating current output by the frequency conversion module increases. If the amplitude of the alternating current received by the solenoid valve is equal to the amplitude threshold at this time, it can be seen from the above content that the valve core of the solenoid valve can move, and the solenoid valve can switch the working state. When the speed of the target load detected by the speed sensing module is relatively high, the amplitude of the alternating current output by the frequency conversion module is relatively large, that is, the electric energy of the alternating current output by the frequency conversion module is relatively large. If the amplitude of the alternating current received by the solenoid valve at this time is greater than the amplitude threshold, it can be seen from the above content that the valve core of the solenoid valve can move, and the solenoid valve can switch the working state.

[0102] In general, the speed signal generator in the embodiment of the present application can output alternating current based on the speed of the target load through the speed sensing module, and provide alternating current with a frequency within the target frequency range to the solenoid valve through the frequency conversion module, so that the solenoid valve maintains the working state unchanged or switches the working state based on the amplitude of the received alternating current, and the amplitude of the alternating current received by the solenoid valve is positively correlated with the speed of the target load.

[0103] In some optional embodiments, when the solenoid valve in the powertrain is a DC solenoid valve, the speed signal generating module may include a speed sensing module and a rectifier module. The input end of the rectifier is connected to the speed sensing module, and the output end of the rectifier is connected to the solenoid valve. The speed sensing module can detect the speed of the target load and output an alternating current whose energy is positively correlated with the speed of the target load. The alternating current is the output electrical energy of the speed signal generator in the above content. Specifically, the specific implementation method of the speed sensing module can refer to the above Fig.10a , Fig.10b and Fig.10c The specific implementation method shown in the embodiment of the present application will not be described in detail here.

[0104] Furthermore, the rectifier module can rectify the alternating current output by the speed sensing module to output direct current to the solenoid valve. It should be noted that the direct current output by the rectifier module can be a voltage signal or a current signal, and the voltage or current of the direct current is positively correlated with the speed of the target load. Specifically, when the speed of the target load is higher, the voltage or current of the direct current output by the rectifier module is larger, that is, the energy of the direct current is larger; when the speed of the target load is lower, the voltage or current of the direct current output by the rectifier module is smaller, that is, the energy of the direct current is smaller.

[0105] In some feasible implementations, the solenoid valve can switch its working state when it receives direct current output by the rectifier module and the voltage or current of the direct current is greater than or equal to the DC threshold, and maintain its working state when the voltage or current of the direct current is less than the DC threshold. The DC threshold refers to the minimum value of the current or voltage that can cause the solenoid valve to switch its working state when the solenoid valve receives direct current. In other words, when the current or voltage of the direct current received by the solenoid valve is greater than or equal to the DC threshold, the valve core of the solenoid valve can overcome the spring force and move. Specifically, the change in the working state of the solenoid valve when it receives direct current can be referred to. Fig.13 As shown, Fig.13 Another waveform diagram provided for an embodiment of the present application.

[0106] like Fig.13 As shown, when the speed of the target load detected by the speed sensing module is relatively low, the amplitude and value of the AC power output by the speed sensing module will be relatively small. After being rectified by the rectifier module, the voltage or current of the DC power output will also be relatively small, that is, the energy of the DC power output by the rectifier module is relatively small. If the voltage or current of the DC power received by the solenoid valve is less than the DC threshold value at this time, it can be seen from the above content that the valve core of the solenoid valve does not move, and the solenoid valve remains in the working state unchanged. When the speed of the target load detected by the speed sensing module increases, the voltage or current of the DC power output by the rectifier module increases, that is, the electric energy of the DC power output by the rectifier module increases. If the voltage or current of the DC power received by the solenoid valve is equal to the DC threshold value at this time, it can be seen from the above content that the valve core of the solenoid valve can move, and the solenoid valve can switch the working state. When the speed of the target load detected by the speed sensing module is relatively high, the voltage or current of the DC power output by the rectifier module is relatively large, that is, the energy of the DC power output by the rectifier module is relatively large. If the voltage or current of the DC power received by the solenoid valve is greater than the DC threshold, it can be seen from the above content that the valve core of the solenoid valve can move and the solenoid valve can switch the working state.

[0107] In general, the speed signal generator in the embodiment of the present application can output alternating current based on the speed of the target load through the speed sensing module, and rectify the alternating current through the rectifier module to provide direct current to the solenoid valve, and enable the solenoid valve to maintain the working state unchanged or switch the working state based on the voltage or current of the received direct current, and the voltage or current of the direct current received by the solenoid valve is positively correlated with the speed of the target load.

[0108] In general, the powertrain provided in the embodiment of the present application provides electrical energy to the solenoid valve based on the speed of the target load through the speed signal generator, so that the solenoid valve can switch the working state or keep the state unchanged based on the amount of electrical energy provided by the speed signal generator to adjust the flow rate of one or more flow channel outlets. Exemplarily, the powertrain can adjust the flow rate of one or more flow channel outlets so that the liquid flows to the load with cooling requirements and reduces the liquid delivery to the load with low cooling requirements, so as to reduce the energy consumption of the powertrain in delivering liquid while meeting the cooling requirements of the load, and reduce the mechanical resistance of the load stirring excess liquid. It can be understood that the powertrain of the embodiment of the present application does not need to set up an additional controller to control the working state of the solenoid valve, which can reduce the transmission delay of the link and the complexity of the system, and realize independent control of the solenoid valve, with a simple structure, easy to implement, and strong applicability. In addition, by setting a signal amplifier between the speed signal generator and the solenoid valve, the powertrain can amplify the output electrical energy of the speed signal generator before providing it to the solenoid valve, ensuring that the solenoid valve can stably switch its working state. The electrical energy output by the speed signal generator can be direct current or alternating current, with rich application scenarios, simple structure, and easy implementation.

[0109] It should be noted that when the powertrain is a lubrication system, the specific implementation of the lubrication system can refer to the above Figures 1 to 13 The specific implementation method shown in the embodiment of the present application will not be described in detail here.

[0110] See also Fig.14 , Fig.14 A schematic diagram of a flow chart of a powertrain control method provided in an embodiment of the present application. The powertrain control method provided in an embodiment of the present application is applicable to Figures 1 to 13 Specifically, the control method of the powertrain may include the following steps:

[0111] S101 . Providing electric energy to a solenoid valve based on a rotation speed of a target load through a rotation speed signal generator, where the target load is one of a plurality of loads.

[0112] It is understandable that the solenoid valve can be arranged on the liquid flow channel between the liquid pump and the load, and is used to connect one or more flow channel outlets with one or more flow channel inlets. When the solenoid valve is turned on, the liquid pump can deliver liquid to the load through the flow channel outlet of the liquid flow channel. When the solenoid valve is turned off, the liquid flow channel between the liquid pump and the load is disconnected, and the flow channel outlet no longer outputs liquid to the load. Furthermore, due to the difference in cooling requirements between different loads, in order to deliver liquid to loads with cooling requirements and reduce the delivery of liquid to loads with low cooling requirements, so as to meet the cooling requirements of the loads while reducing the energy consumption of the liquid pump in delivering liquid, the powertrain can enable the speed signal generator to provide electrical energy to the solenoid valve based on the speed of the target load. Among them, the target load refers to one of the multiple loads. The target load rotates and has a certain speed during operation, and the speed of the target load can reflect the cooling requirements of the target load or other loads.

[0113] The specific implementation of S101 can refer to the above Figures 1 to 13 The implementation method performed by the powertrain in the present application will not be described in detail here.

[0114] S102, regulating the flow rate output from one or more flow channel outlets to one or more loads based on the energy level of the electrical energy through a solenoid valve.

[0115] It is understandable that the powertrain can switch the working state of the solenoid valve or keep the working state unchanged (for example, turn on or off) through the electric energy provided by the speed signal generator, thereby adjusting the liquid flow rate of one or more flow channel outlets. Specifically, the powertrain provided in the embodiment of the present application provides electric energy to the solenoid valve through the speed signal generator, which can make the solenoid valve keep the working state unchanged or switch the working state based on the electric energy provided by the speed signal generator, and then adjust the flow rate output from one or more flow channel outlets to one or more loads to control the flow direction of the liquid, so that the liquid flows to the load with cooling requirements, and reduces the delivery of liquid to the load with low cooling requirements, so as to meet the cooling requirements of the load while reducing the energy consumption of the powertrain to deliver liquid. It is understandable that the powertrain of the embodiment of the present application does not need to set up an additional controller to control the working state of the solenoid valve, which can reduce the transmission delay of the link and the complexity of the system, and realize independent control of the solenoid valve, with a simple structure, easy to implement, and strong applicability.

[0116] The specific implementation of the above S102 can refer to the above Figures 1 to 13 The implementation method performed by the powertrain in the present application will not be described in detail here.

[0117] In an optional embodiment, the multiple loads include a first load, the multiple liquid flow channels include a first liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and a second flow channel outlet for outputting liquid to the first load, and the control method further includes: providing electrical energy to the solenoid valve based on the rotational speed of the target load through a speed signal generator; and adjusting the flow rates of the first flow channel outlet and the second flow channel outlet based on the energy level of the electrical energy through the solenoid valve to increase or decrease the flow rates at the same time.

[0118] It can be understood that when the first liquid flow channel outputs liquid to the target load through the first flow channel outlet and outputs liquid to the first load through the second flow channel outlet, the solenoid valve can quickly adjust the flow rates of the first flow channel outlet and the second flow channel outlet to increase or decrease at the same time based on the amount of electric energy provided by the speed signal generator, thereby realizing real-time passive control of the liquid flow rates of different flow channel outlets.

[0119] In an optional embodiment, the multiple loads include a second load, the multiple liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load, and the control method further includes: providing electrical energy to the solenoid valve based on the rotational speed of the target load through a speed signal generator; adjusting the flow rate of the first flow channel outlet based on the energy level of the electrical energy through the solenoid valve to increase the flow rate of the third flow channel outlet so as to decrease the flow rate of the third flow channel outlet, or adjusting the flow rate of the first flow channel outlet to decrease so as to increase the flow rate of the third flow channel outlet.

[0120] It can be understood that when the first liquid flow channel outputs liquid to the target load through the first flow channel outlet, and the second liquid flow channel outputs liquid to the second load through the third flow channel outlet, the solenoid valve can quickly adjust the first flow channel outlet to increase or decrease and increase or decrease the third flow channel outlet based on the amount of electrical energy provided by the speed signal generator, thereby achieving real-time passive control of the liquid flow rates of different flow channel outlets.

[0121] In an optional embodiment, the multiple loads include a second load, the multiple liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load, and the control method further includes: providing electrical energy to the solenoid valve based on the rotational speed of the target load through a speed signal generator; adjusting the flow rate of the third flow channel outlet based on the energy level of the electrical energy through the solenoid valve to increase the flow rate of the first flow channel outlet so as to reduce the flow rate of the first flow channel outlet, or adjusting the flow rate of the third flow channel outlet to decrease so as to increase the flow rate of the first flow channel outlet.

[0122] It can be understood that when the first liquid flow channel outputs liquid to the target load through the first flow channel outlet and outputs liquid to the second load through the third flow channel outlet, the solenoid valve can quickly adjust the flow rate of the third flow channel outlet to increase or decrease based on the amount of electric energy provided by the speed signal generator, and increase or decrease the flow rate of the first flow channel outlet, thereby realizing real-time passive control of the liquid flow rates of different flow channel outlets.

[0123] In an optional embodiment, the powertrain also includes a signal amplifier, the input end of the signal amplifier is connected to the speed signal generator, and the output end of the signal amplifier is connected to the solenoid valve. The method also includes: amplifying the output electrical energy of the speed signal generator by the signal amplifier, and providing the amplified electrical energy to the solenoid valve.

[0124] It is understandable that, by providing a signal amplifier between the speed signal generator and the solenoid valve, the powertrain can amplify the output electrical energy of the speed signal generator before providing it to the solenoid valve, thereby ensuring that the solenoid valve can stably switch its working state.

[0125] In an optional embodiment, electric energy is provided to the solenoid valve based on the speed of the target load through a speed signal generator, including: outputting electric energy based on the speed of the target load through the speed signal generator, the electric energy includes alternating current or direct current, and the energy level of the electric energy is positively correlated with the speed of the target load, and the energy level of the electric energy includes the frequency level of alternating current, the amplitude level of alternating current or the current level of direct current, and the voltage level of direct current.

[0126] It can be understood that the electric energy output by the speed signal generator includes alternating current or direct current, with rich application scenarios and strong applicability.

[0127] In an optional embodiment, the speed signal generator includes a speed sensing module and a frequency conversion module, the input end of the frequency conversion module is connected to the speed sensing module, and the output end of the frequency conversion module is connected to the solenoid valve; the speed signal generator provides electric energy to the solenoid valve based on the speed of the target load, including: outputting alternating current based on the speed of the target load through the speed sensing module; providing alternating current with a frequency within a target frequency range to the solenoid valve based on the alternating current output by the speed sensing module through the frequency conversion module, and the amplitude of the alternating current within the target frequency range is positively correlated with the speed of the target load.

[0128] It can be understood that the speed signal generator provides alternating current with a frequency within the target frequency range to the solenoid valve through the speed sensing module and the frequency conversion module, so that the solenoid valve switches the working state or maintains the working state unchanged based on the amplitude of the alternating current, thereby controlling the flow direction of the liquid. The implementation principle is simple and has strong applicability.

[0129] In an optional embodiment, the speed signal generator includes a speed sensing module and a rectifier module, the input end of the rectifier module is connected to the speed sensing module, and the output end of the rectifier module is connected to the solenoid valve; the speed signal generator provides electric energy to the solenoid valve based on the speed of the target load, including: outputting alternating current based on the speed of the target load through the speed sensing module; providing direct current to the solenoid valve based on the alternating current output by the speed sensing module through the rectifier module, and the current or voltage of the direct current is positively correlated with the speed of the target load.

[0130] It can be understood that the speed signal generator provides direct current to the solenoid valve through the speed sensing module and the rectifier module, so that the solenoid valve switches the working state or maintains the working state unchanged based on the voltage or current of the direct current, thereby controlling the flow direction of the liquid. The implementation principle is simple and has strong applicability.

[0131] In an optional embodiment, the energy size of the electric energy is the frequency size of the alternating current; the solenoid valve maintains a state unchanged or switches the working state based on the energy size of the electric energy to control the flow direction of the liquid, including: switching the working state through the solenoid valve when the frequency size of the electric energy is within the target frequency range, and maintaining the state unchanged when the frequency size of the electric energy is outside the target frequency range.

[0132] It is understandable that when the speed signal generator provides alternating current to the solenoid valve, the solenoid valve can switch the working state or maintain the working state unchanged based on the frequency of the alternating current, thereby controlling the flow direction of the liquid. The control method is simple and easy to implement.

[0133] In an optional embodiment, the energy size of the electric energy includes the frequency size and amplitude size of the alternating current; the solenoid valve maintains a state unchanged or switches the working state based on the energy size of the electric energy to control the flow direction of the liquid, including: switching the working state through the solenoid valve when the frequency size of the electric energy is within the target frequency range and the amplitude size of the electric energy is greater than or equal to the amplitude threshold, and maintaining the state unchanged when the frequency size of the electric energy is outside the target frequency range and / or the amplitude size of the electric energy is less than the amplitude threshold.

[0134] It can be understood that when the speed signal generator provides alternating current to the solenoid valve, the solenoid valve can switch the working state or maintain the working state unchanged based on the frequency, amplitude and amplitude threshold of the alternating current, thereby controlling the flow direction of the liquid. The control method is simple and easy to implement.

[0135] In an optional embodiment, the energy size of the electric energy includes the voltage size or current size of direct current; the solenoid valve is used to maintain a state unchanged or switch the working state based on the energy size of the electric energy to control the flow direction of the liquid, including: switching the working state through the solenoid valve when the voltage size or current size of the electric energy is greater than or equal to the DC threshold, and maintaining the state unchanged when the voltage size or current size of the electric energy is less than the DC threshold.

[0136] It can be understood that when the speed signal generator provides direct current to the solenoid valve, the solenoid valve can switch the working state or maintain the working state unchanged based on the voltage or current of the direct current and the DC threshold, thereby controlling the flow direction of the liquid. The control method is simple and easy to implement.

Claims

1. A powertrain, characterized in that: The powertrain includes a speed signal generator, a solenoid valve, a liquid pump, a plurality of liquid channels and a plurality of loads, each of the liquid channels includes a channel inlet and at least one channel outlet, the outlet of the liquid pump is used to communicate with each of the channel inlets, and one of the channel outlets is used to output liquid to one of the loads; the solenoid valve is used to connect one or more channel inlets with one or more channel outlets; The speed signal generator is used to provide electric energy to the solenoid valve based on the speed of a target load, wherein the target load is one of the multiple loads; The solenoid valve is used to adjust the flow rate output from the one or more flow channel outlets to the one or more loads based on the energy level of the electrical energy.

2. The powertrain according to claim 1, characterized in that: The multiple loads include a first load, the multiple liquid flow channels include a first liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and a second flow channel outlet for outputting liquid to the first load; The speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load; The solenoid valve is used to adjust the flow rates of the first flow channel outlet and the second flow channel outlet to increase or decrease simultaneously based on the energy level of the electric energy.

3. The powertrain according to claim 1 or 2, characterized in that: The plurality of loads include a second load, the plurality of liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load; The speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load; The solenoid valve is used to adjust the flow rate of the first flow channel outlet to increase so that the flow rate of the third flow channel outlet decreases, or to adjust the flow rate of the first flow channel outlet to decrease so that the flow rate of the third flow channel outlet increases based on the energy size of the electric energy.

4. The powertrain according to claim 1 or 2, characterized in that: The plurality of loads include a second load, the plurality of liquid flow channels include a first liquid flow channel and a second liquid flow channel, the first liquid flow channel includes a first flow channel outlet for outputting liquid to the target load, and the second liquid flow channel includes a third flow channel outlet for outputting liquid to the second load; The speed signal generator is used to provide electrical energy to the solenoid valve based on the speed of the target load; The solenoid valve is used to adjust the flow rate of the third flow channel outlet to increase so as to reduce the flow rate of the first flow channel outlet, or to adjust the flow rate of the third flow channel outlet to decrease so as to increase the flow rate of the first flow channel outlet based on the energy size of the electric energy.

5. The power assembly according to any one of claims 1 to 4, characterized in that: The power assembly further includes a signal amplifier, an input end of the signal amplifier is connected to the speed signal generator, and an output end of the signal amplifier is connected to the solenoid valve; The signal amplifier is used to amplify the output electric energy of the speed signal generator and provide the amplified electric energy to the solenoid valve.

6. The power assembly according to any one of claims 1 to 5, characterized in that: The speed signal generator is used to output electric energy based on the speed of the target load, the electric energy includes alternating current or direct current, and the energy of the electric energy is positively correlated with the speed of the target load. The energy of the electric energy includes the frequency of the alternating current, the amplitude of the alternating current or the current of the direct current, and the voltage of the direct current.

7. The powertrain according to claim 6, characterized in that: The speed signal generator includes a speed sensing module and a frequency conversion module, the input end of the frequency conversion module is connected to the speed sensing module, and the output end of the frequency conversion module is connected to the solenoid valve; The rotation speed sensing module is used to output AC power based on the rotation speed of the target load; The frequency conversion module is used to provide the solenoid valve with AC power having a frequency within a target frequency range based on the AC power output by the speed sensing module, and the amplitude of the AC power within the target frequency range is positively correlated with the speed of the target load.

8. The powertrain according to claim 6, characterized in that: The speed signal generator includes a speed sensing module and a rectifier module, the input end of the rectifier module is connected to the speed sensing module, and the output end of the rectifier module is connected to the solenoid valve; The rotation speed sensing module is used to output AC power based on the rotation speed of the target load; The rectifier module is used to provide direct current to the solenoid valve based on the alternating current output by the speed sensing module, and the current or voltage of the direct current is positively correlated with the speed of the target load.

9. The powertrain according to claim 6, characterized in that: The energy of the electric energy is the frequency of the alternating current; the solenoid valve is used to switch the working state when the frequency of the electric energy is within the target frequency range, and to keep the state unchanged when the frequency of the electric energy is outside the target frequency range.

10. The powertrain according to claim 6, characterized in that: The energy size of the electric energy includes the frequency size and amplitude size of the alternating current; the solenoid valve is used to switch the working state when the frequency size of the electric energy is within the target frequency range and the amplitude size of the electric energy is greater than or equal to the amplitude threshold, and maintain the state unchanged when the frequency size of the electric energy is outside the target frequency range and / or the amplitude size of the electric energy is less than the amplitude threshold.

11. The powertrain according to claim 6, characterized in that: The energy size of the electric energy includes the voltage size or current size of the direct current. The solenoid valve is used to switch the working state when the voltage size or current size of the electric energy is greater than or equal to the DC threshold, and maintain the state unchanged when the voltage size or current size of the electric energy is less than the DC threshold.

12. A vehicle, characterized in that: The vehicle comprises wheels and a powertrain according to any one of claims 1 to 11, wherein the powertrain is used to drive the wheels.

13. A method for controlling a powertrain, characterized in that: The power assembly includes a speed signal generator, a solenoid valve, a liquid pump, a plurality of liquid channels and a plurality of loads, each of the liquid channels includes a channel inlet and at least one channel outlet, the outlet of the liquid pump is used to communicate with each of the channel inlets, and one of the channel outlets is used to output liquid to one of the loads; The solenoid valve is used to connect one or more flow channel inlets and one or more flow channel outlets, and the method includes: providing electric energy to the solenoid valve based on the rotation speed of a target load through the rotation speed signal generator, wherein the target load is one of the multiple loads; The solenoid valve adjusts the flow rate output from the one or more flow channel outlets to the one or more loads based on the energy level of the electrical energy.

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