An electrically controlled silicone oil fan clutch and a control method thereof

Abstract

The application discloses an electric control silicone oil fan clutch and a control method thereof. The electric control silicone oil fan clutch is internally provided with a working cavity, an oil storage cavity and an oil return channel. The oil return channel is communicated with the working cavity and the oil storage cavity. The electric control silicone oil fan clutch further comprises an oil return control mechanism. The oil return control mechanism comprises an oil return hole valve plate, an elastic component and a first electromagnetic component. The oil return hole valve plate is arranged in the oil storage cavity and is connected to the inner wall of the shell through the elastic component. The first electromagnetic component is arranged on the outer wall of the shell. The first electromagnetic component and the elastic component can drive the oil return hole valve plate to move along the axial direction to adjust the oil return area. The oil return control mechanism is additionally arranged to control the oil return area. In the normal rotation of the fan, a certain oil return area is maintained to realize the circulating flow of the silicone oil. When the fan needs to be separated, the oil return area can be increased to rapidly separate the fan, reduce the noise, reduce the oil consumption, avoid the torque occupied by the fan and ensure the power of the whole vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling systems, in particular to an electric control silicon oil fan clutch and a control method thereof. BACKGROUND

[0002] The prior art electric control silicon oil fan clutch has no corresponding control means for the oil return hole, but in some working conditions, such as in the starting period of the engine, the silicon oil cannot flow back to the oil storage cavity quickly, so that the fan is still in the full engagement state; or when the vehicle is running the air conditioner, the fan speed will be set to a certain value, which is generally greater than the engine idle speed, and when the vehicle needs to be parked at idle speed, the fan is still in the full engagement state; or when the vehicle needs to start at a high speed, the fan is in the full engagement state for a short time; or when the vehicle is climbing, the fan is in the engagement state due to high water temperature, and when the climbing is completed, the fan cannot quickly control the full disengagement. The above working conditions will cause the fan to be in the full engagement state, generate noise, and affect comfort; at the same time, the full engagement of the fan or the too high speed of the fan will cause high oil consumption and affect the economy; when the vehicle starts, the fan occupies part of the torque, affecting the vehicle power. SUMMARY

[0003] The purpose of the present application is to provide an electric control silicon oil fan clutch and a control method thereof, so that the fan can quickly control the full disengagement, reduce the noise, reduce the oil consumption, avoid the torque occupied by the fan, and ensure the vehicle power.

[0004] To solve the above technical problems, the present application provides an electric control silicon oil fan clutch, comprising a shell, a working cavity, an oil storage cavity and an oil return channel are arranged inside the shell,

[0005] Further comprising an oil return control mechanism, the oil return control mechanism comprises an oil return hole valve plate, an elastic component and a first electromagnetic component, the oil return hole valve plate is arranged inside the oil storage cavity and connected to the inner wall of the shell through the elastic component, the first electromagnetic component is correspondingly arranged on the outer wall of the shell, and the first electromagnetic component and the elastic component can drive the oil return hole valve plate to move axially to adjust the oil return area of the oil return channel.

[0006] The electric control silicon oil fan clutch of the application adds an oil return control mechanism to adjust the oil return area of the oil return channel, when the fan is needed to cool and dissipate heat for the engine, the oil return area of the oil return channel can be controlled to be at a minimum value, specifically, the oil return channel can be completely closed, at this time, the silicon oil can only enter the working cavity and cannot return to the oil storage cavity; the oil return area can also be equal to that of the prior art, at this time, the silicon oil can circulate between the working cavity and the oil storage cavity; when the fan is no longer needed to cool and dissipate heat for the engine, the oil return area of the oil return channel can be controlled to be at a maximum value, in actual application, the diameter of the oil return channel can be increased on the basis of the oil return channel of the prior art, when the oil return area of the oil return channel is at the maximum value, the silicon oil can quickly return to the oil storage cavity, thereby the fan can be quickly disengaged, noise is reduced, ride comfort is improved, fuel consumption is reduced, vehicle economy is improved, the fan torque is avoided, and vehicle power is ensured.

[0007] Optionally, the shell comprises a front cover body and a driven plate integrally formed inside the front cover body, the oil return channel is arranged between the front cover body and the driven plate, and the front cover body and the driven plate have a cavity at a position close to the radial middle part, the outer wall of the cavity is convex from inside to outside to form a convex part, the oil return hole valve plate is connected to the inner side of the end wall of the convex part through the elastic part, and the area inside the oil return hole valve plate in the cavity forms the oil storage cavity.

[0008] The oil return hole valve plate moves along the axial direction and can be switched between a first position and a second position, in the first position, the oil return hole valve plate partially blocks the oil return channel, and in the second position, the oil return hole valve plate is entirely located in the convex part and is axially staggered with the oil return channel.

[0009] Optionally, the inner circumferential wall diameter of the convex part gradually decreases from inside to outside, the oil return hole valve plate is in the form of a circular basin towards the inner end and comprises a bottom part and a side part enclosed outside the circumferential wall of the bottom part, and the diameter of the side part gradually increases away from the bottom part.

[0010] Optionally, the end wall of the driven plate facing the front cover body extends to the radial inner side of the opening end of the convex part, the end wall of the driven plate facing the front cover body is provided with a notch groove for forming part of the oil return channel, the oil return hole valve plate is attached to the driven plate in the first position, and the oil return area of the oil return channel is the cross-sectional area of the notch groove.

[0011] Optionally, the shell interior is further provided with an oil inlet channel, the oil inlet channel is communicated with the working cavity and the oil storage cavity, and the oil inlet channel further comprises an oil inlet control mechanism, the oil inlet control mechanism comprises an oil inlet hole valve plate and a second electromagnetic component, the second electromagnetic component can drive the oil inlet hole valve plate to move in the axial direction to adjust an oil inlet area of the oil inlet channel,

[0012] The first electromagnetic component comprises a coil, a control switch and an energy storage unit connected in an electric manner, the control switch is closed or opened, and the coil, the control switch and the energy storage unit can form a closed loop or be disconnected, the coil is located in a magnetic field of the second electromagnetic component, when the first electromagnetic component and the second electromagnetic component move relative to each other, the coil can cut the magnetic induction lines generated by the second electromagnetic component to supply power to the energy storage unit, and the energy storage unit can also supply power to the coil, the coil generates a magnetic force when powered on to attract the oil return hole valve plate to move in the axial direction.

[0013] Optionally, opposite ends of the oil return hole valve plate and the second electromagnetic component are same magnetic poles, and opposite ends of the oil return hole valve plate and the coil are opposite magnetic poles.

[0014] Optionally, the control further comprises a controller, the controller is electrically connected with the first electromagnetic component, and the controller is further electrically connected with an engine control unit.

[0015] Optionally, the controller is provided with a first Bluetooth module, and the first Bluetooth module is connected with a second Bluetooth module arranged on the engine control unit in a Bluetooth manner.

[0016] The application further provides a control method of the electrically-controlled silicon oil fan clutch, which is suitable for the electrically-controlled silicon oil fan clutch, when one of the following first preset conditions is met, the first electromagnetic component drives the oil return hole valve plate to move in the axial direction to adjust an oil return area of the oil return channel to a maximum value, and the first preset conditions comprise:

[0017] A difference between an actual fan rotating speed and a preset fan rotating speed exceeds a preset fan rotating speed difference value;

[0018] An average load rate of the engine in 5s is not greater than a preset load rate value, an actual water temperature is not greater than a preset water temperature value, and an actual fuel injection amount is not greater than a preset fuel injection amount value;

[0019] The actual water temperature is not greater than the preset water temperature value, a vehicle driving acceleration is not less than a preset acceleration value, and a vehicle driving speed is not greater than a preset speed value.

[0020] The control method of the electric control silicone oil fan clutch can adjust the oil return area of the oil return channel to the maximum value in the preset working condition, so that the silicone oil can quickly flow back to the oil storage cavity, reduce the noise, improve the ride comfort, reduce the oil consumption, improve the economy of the whole vehicle, avoid the torque occupied by the fan, and ensure the power performance of the whole vehicle.

[0021] Optionally, whether the oil return hole valve plate is in the preset position is monitored, and if not, the oil return hole valve plate fault signal is output.

[0022] Optionally, the electric control silicone oil fan clutch is further provided with an oil inlet channel in the shell, the oil inlet channel is communicated with the working cavity and the oil storage cavity, and the oil inlet channel further comprises an oil inlet control mechanism, the oil inlet control mechanism comprises an oil inlet hole valve plate and a second electromagnetic component, the second electromagnetic component can drive the oil inlet hole valve plate to move axially to adjust the oil inlet area of the oil inlet channel,

[0023] The first electromagnetic component comprises a coil, a control switch and an energy storage unit connected in series, the control switch is closed or opened, and the coil, the control switch and the energy storage unit can form a closed loop or be disconnected, the coil is located in the magnetic field of the second electromagnetic component, when the first electromagnetic component and the second electromagnetic component move relatively, the coil can cut the magnetic induction lines generated by the second electromagnetic component to supply power to the energy storage unit, and the energy storage unit can also supply power to the coil, the coil generates a magnetic force when electrified, and the magnetic force attracts the oil return hole valve plate to move axially,

[0024] When one of the following second preset conditions is met, the control switch is controlled to be closed, the coil, the control switch and the energy storage unit form a closed loop, the coil cuts the magnetic induction lines generated by the second electromagnetic component when the first electromagnetic component and the second electromagnetic component move relatively to supply power to the energy storage unit, and the second preset condition comprises:

[0025] The electric quantity of the energy storage unit is not greater than a preset electric quantity value;

[0026] The electric quantity of the energy storage unit is within a preset range, the speed difference between the engine speed and the engine idle speed exceeds a preset engine speed difference value, the actual water temperature value is not greater than a preset water temperature value, the vehicle is in a stationary state, the engine is in a cold start state, and the oil temperature is not greater than a preset oil temperature value;

[0027] The electric quantity of the energy storage unit is within a preset range, the output torque of the engine is not greater than a preset output torque value, and the slope of the vehicle is not greater than a preset slope value;

[0028] The vehicle is in a braking state. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1A structure schematic view of a specific embodiment of the oil return control mechanism in the electrically-controlled silicone oil fan clutch provided by the present application;

[0030] Figure 2 For Figure 1 A structure schematic view of the oil return hole valve plate and the driven plate in the oil return control mechanism in a state of adhesion;

[0031] Figure 3 For Figure 1 A partial enlarged view of the oil return control mechanism;

[0032] Figure 4 For Figure 1 A schematic view of the magnetic pole of the oil return control mechanism and the second electromagnetic component;

[0033] Figure 5 For Figure 1 A control general block diagram of the oil return control mechanism;

[0034] Figure 6 For Figure 1 A control logic diagram of the oil return hole valve plate in the oil return control mechanism;

[0035] Figure 7 For Figure 1 A control logic diagram of the oil return control mechanism when generating electricity by electromagnetism;

[0036] Among them, Figures 1-4 The reference signs in the drawings are explained as follows:

[0037] 1 - oil return hole valve plate;

[0038] 2 - elastic component;

[0039] 3 - front cover body;

[0040] 4 - driven plate;

[0041] 5 - second electromagnetic component;

[0042] 6 - coil;

[0043] a - oil return channel; b - protruding part. DETAILED DESCRIPTION

[0044] In order to make the skilled in the art better understand the technical solutions of the present application, the present application is further described in detail below in combination with the drawings and specific embodiments.

[0045] The "multiple" described herein is generally two or more; and when "multiple" is used to represent the number of several components, it does not represent the mutual relationship in the number of these components.

[0046] In this paper, the extension direction along the driving shaft is "axial".

[0047] In this document, the direction close to the inside of the housing is "in", and the direction close to the outside of the housing is "out".

[0048] Before introducing the oil return control mechanism of the electric control silicon oil fan clutch of the present application, the specific structure and basic principle of the electric control silicon oil fan clutch are introduced first.

[0049] The electric control silicon oil fan clutch generally comprises a driving mechanism and a driven mechanism matched with each other, and an oil inlet control mechanism, the driving mechanism is used to provide power to the driven mechanism, wherein:

[0050] The driving mechanism comprises a driving shaft and a driving plate installed on the driving shaft, and the driving shaft and the driving plate can rotate synchronously.

[0051] The driven mechanism comprises a front cover and a housing connected together, and an inner cavity is formed between the front cover and the housing, the driving plate is rotatably installed in the inner cavity, the front cover comprises a front cover body and a driven plate integrally formed inside the front cover body, and a cavity is formed between the front cover body and the driven plate at a position close to the radial middle part, the cavity forms an oil storage cavity, a first tooth groove is formed on the edge of the driving plate, a second tooth groove matched with the first tooth groove is formed on the inner wall of the driven plate, the first tooth groove and the second tooth groove form a working cavity, an oil return channel is further arranged between the front cover body and the driven plate, the oil return channel communicates the working cavity and the oil storage cavity, and an oil inlet channel is further arranged on the driven plate, the oil inlet channel communicates the working cavity and the oil storage cavity;

[0052] The oil inlet control mechanism comprises an oil inlet hole valve plate, an elastic component and a second electromagnetic component, the second electromagnetic component specifically comprises an electromagnetic coil, the electromagnetic coil is installed on the driving shaft,

[0053] When the engine needs to be cooled and dissipated by the fan, the electromagnetic coil is controlled to be de-energized, the oil inlet hole valve plate moves away from the electromagnetic coil under the restoring force of the elastic component, the electromagnetic coil opens the oil inlet hole, the silicon oil inside the oil storage cavity enters the working cavity along the oil inlet channel, and part of the silicon oil returns to the oil storage cavity along the oil return channel, so as to circulate back and forth, and since the oil return area is smaller than the oil inlet area, the electric control silicon oil fan clutch can be ensured to be in a coupled state.

[0054] When the engine no longer needs to be cooled and dissipated by the fan, the electromagnetic coil is controlled to be energized to generate a magnetic field, the oil inlet hole valve plate moves towards the electromagnetic coil under the electromagnetic force of the electromagnetic coil, the oil inlet hole valve plate closes the oil inlet hole, the silicon oil inside the working cavity returns to the oil storage cavity along the oil return channel and cannot enter the working cavity again, at this time, the silicon oil in the working cavity gradually decreases, the electric control silicon oil fan enters a separated state, and the fan is reduced in speed until it stops rotating.

[0055] It can be seen that the prior art has no corresponding control means for the oil return hole, and the oil return area is small, and the technical problems existing in the background art occur. Based on this, the present application proposes a new electric control silicone oil fan clutch, and the technical scheme of the present application will be described in detail below.

[0056] Please refer to Figures 1-3 , Figure 1 The structure diagram of a specific embodiment of the oil return control mechanism in the electric control silicone oil fan clutch provided by the present application is shown in the figure. Figure 2 For Figure 1 The structure diagram of the oil return hole valve plate and the driven plate in the oil return control mechanism in the state of being attached is shown in the figure. Figure 3 For Figure 1 The partial enlarged view of the oil return control mechanism is shown in the figure.

[0057] The present application provides an electric control silicone oil fan clutch, which comprises a shell, a working cavity, an oil storage cavity and an oil return channel a are arranged inside the shell, the oil return channel a communicates with the working cavity and the oil storage cavity, and further comprises an oil return control mechanism, the oil return control mechanism comprises an oil return hole valve plate 1, an elastic component 2 and a first electromagnetic component, the oil return hole valve plate 1 is arranged inside the oil storage cavity and is connected to the inner wall of the shell through the elastic component 2, the first electromagnetic component is correspondingly arranged on the outer wall of the shell, and the first electromagnetic component and the elastic component 2 can drive the oil return hole valve plate 1 to move axially to adjust the oil return area of the oil return channel a.

[0058] The electric control silicone oil fan clutch of the present application adds the oil return control mechanism to adjust the oil return area of the oil return channel a, when it is needed to cool and dissipate heat of the engine through the fan, the oil return area of the oil return channel a can be controlled to be at a minimum value, specifically, the oil return channel a can be completely closed, at this time, the silicone oil can only enter the working cavity and cannot return to the oil storage cavity; the oil return area can also be made equal to the oil return area of the prior art, at this time, the silicone oil can circulate between the working cavity and the oil storage cavity; and when the engine does not need to be cooled and dissipated through the fan, the oil return area of the oil return channel a can be controlled to be at a maximum value, in actual application, the diameter of the oil return channel a can be increased on the basis of the oil return channel of the prior art, when the oil return area of the oil return channel a is at the maximum value, the silicone oil can quickly return to the oil storage cavity, thereby the fan can be quickly disengaged, noise is reduced, ride comfort is improved, fuel consumption is reduced, vehicle economy is improved, the fan is avoided from occupying torque, and vehicle power is ensured.

[0059] Further, as Figure 1As shown, the shell comprises a front cover body 3 and a driven plate 4 integrally formed inside the front cover body 3, an oil return channel a is arranged between the front cover body 3 and the driven plate 4, and the front cover body 3 and the driven plate 4 have a cavity at a position close to the radial middle part, the outer wall of the cavity is convex from inside to outside, forming a convex part b, the oil return hole valve plate 1 is connected to the inner side of the end wall of the convex part b through the elastic part 2, the first electromagnetic part is correspondingly connected to the outer side of the end wall of the convex part b, and the area inside the oil return hole valve plate 1 in the cavity forms an oil storage cavity,

[0060] The oil return hole valve plate 1 moves in the axial direction and can be switched between the first position and the second position. Specifically, when the engine needs to be cooled and radiated by the fan, the first electromagnetic part is de-energized, the oil return hole valve plate 1 is partially blocked to the oil return channel a under the restoring force of the elastic part 2, and the silicone oil can circulate between the working cavity and the oil storage cavity. At this time, the oil return area is the minimum value, and the position of the oil return hole valve plate 1 is the first position. When the engine no longer needs to be cooled and radiated by the fan, the first electromagnetic part is energized to generate a magnetic force, the oil return hole valve plate 1 moves in the direction close to the first electromagnetic part under the action of the magnetic force, and the elastic part 2 is compressed. The oil return hole valve plate 1 is entirely located in the convex part b and is axially offset from the oil return channel a. At this time, the oil return area is the maximum value, and the position of the oil return hole valve plate 1 is the second position.

[0061] As can be seen, the application sets the convex part b to accommodate the oil return hole valve plate 1, and adjusts the axial position of the oil return hole valve plate 1 relative to the oil return channel a to adjust the oil return area.

[0062] It should be noted that the application separately describes the front cover body 3 and the driven plate 4, which is only for better description of the functions of the two, and in practice, the front cover body 3 and the driven plate 4 are integrally formed.

[0063] Further, as shown in Figure 2 and Figure 3 The end wall of the driven plate 4 facing the front cover body 3 extends to the radial inner side of the opening end of the convex part b, and the right side of the dashed line is the radial protruding part 41 of the driven plate 4. The end wall of the driven plate 4 facing the front cover body 3 is provided with a notched groove 3a for forming part of the oil return channel a. When the oil return hole valve plate 1 is in the first position, the oil return hole valve plate 1 is in close contact with the driven plate 4, specifically, the opening end wall of the oil return hole valve plate 1 is in close contact with the driven plate 4. At this time, the oil return area of the oil return channel a is the cross-sectional area of the notched groove 3a.

[0064] In this way, by setting the radial protruding part 41 of the driven plate 4, the oil return hole valve plate 1 can be limited, so that the oil return hole valve plate 1 can stably be in the first position, and the oil return channel a has a more accurate oil return area, ensuring that the electronic control silicone oil fan clutch can work normally.

[0065] Please continue to refer to Figure 1 and Figure 3 In the present application, the inner peripheral wall diameter of the protruding part b gradually decreases from inside to outside, and the oil return hole valve plate 1 is a circular basin structure facing the inner end, including a bottom and a side part enclosed in the outer periphery of the bottom, and the diameter of the side part gradually increases in the direction away from the bottom.

[0066] Of course, in actual application, the structure of the protruding part b and the oil return hole valve plate 1 is not limited, such as the inner peripheral wall of the protruding part b and the side part of the oil return hole valve plate 1 are both equal diameter structures, which are also feasible, as long as the structure of the inner peripheral wall of the protruding part b and the side part of the oil return hole valve plate 1 is matched.

[0067] Please refer to Figure 4 , Figure 4 For Figure 1 The schematic diagram of the magnetic pole of the oil return control mechanism and the second electromagnetic component.

[0068] As described above, the inside of the shell is also provided with an oil inlet channel, the oil inlet channel is communicated with the working cavity and the oil storage cavity, and further comprises an oil inlet control mechanism, the oil inlet control mechanism comprises an oil inlet hole valve plate and a second electromagnetic component 5, the second electromagnetic component 5 can drive the oil inlet hole valve plate to move in the axial direction to adjust the oil inlet area of the oil inlet channel.

[0069] It can be understood that in actual application, the first electromagnetic component can also be consistent with the second electromagnetic component 5, and direct power supply through the vehicle battery, but continuous power generation will cause the vehicle battery to lose power and generate too much heat.

[0070] Based on this, in the present application, the first electromagnetic component specifically comprises a coil 6, a control switch and an energy storage unit connected in series, the control switch is closed or opened, and the coil 6, the control switch and the energy storage unit can form a closed loop or be disconnected, the coil 6 is located in the magnetic field of the second electromagnetic component 5, when the first electromagnetic component and the second electromagnetic component 5 move relative to each other, the coil 6 can cut the magnetic induction lines generated by the second electromagnetic component 5 to supply power to the energy storage unit, and the energy storage unit can also supply power to the coil 6, and the coil 6 generates magnetic force after being powered on to attract the oil return hole valve plate 1 to move in the axial direction.

[0071] As set forth above, the present application makes full use of the electromagnetic resources generated by the power-on of the first electromagnetic component, and additionally provides a coil 6 on the front cover 3, which cuts the magnetic induction lines generated by the second electromagnetic component 5, generates an induced current in the coil 6, and supplements the power of the energy storage unit, realizes full use of electromagnetic resources, prevents continuous consumption of the vehicle battery, and ensures normal work of the oil return control mechanism; when power generation is not needed, the control switch can be turned off, the magnetic induction lines are not cut, and the torque loss of the engine is reduced.

[0072] Among them, the energy storage unit is specifically a battery.

[0073] In the present application, the opposite ends of the oil return hole valve plate 1 and the second electromagnetic component 5 are the same magnetic poles, so that the oil return hole valve plate 1 and the second electromagnetic component 5 repel each other; the opposite ends of the oil return hole valve plate 1 and the coil 6 are different magnetic poles, so that the oil return hole valve plate 1 and the coil 6 attract each other, and the attraction force of the two is larger, facilitating the control of the oil return hole valve plate 1.

[0074] In practical application, the opposite ends of the oil return hole valve plate 1 and the second electromagnetic component 5 can be N poles, at this time, the end of the oil return hole valve plate 1 facing the coil 6 is an S pole, and the end of the coil 6 facing the oil return hole valve plate 1 is an N pole; or, the opposite ends of the oil return hole valve plate 1 and the second electromagnetic component 5 are S poles, the end of the oil return hole valve plate 1 facing the coil 6 is an N pole, and the end of the coil 6 facing the oil return hole valve plate 1 is an S pole.

[0075] Please continue to refer to Figure 5 , Figure 5 To Figure 1 The control general block diagram of the oil return control mechanism.

[0076] In the present application, a controller is further included, the controller is electrically connected with the first electromagnetic component, and the controller is further electrically connected with the engine control unit.

[0077] In this way, the controller can receive the control instruction from the engine control unit, control the first electromagnetic component to generate electromagnetic power, or control the first electromagnetic component to generate magnetic force to adjust the position of the oil return hole valve plate 1.

[0078] Specifically, the controller is provided with a first Bluetooth module, the engine control unit is provided with a second Bluetooth module, the first Bluetooth module and the second Bluetooth module are connected through Bluetooth for signal transmission.

[0079] Of course, the electrical connection between the controller and the engine control unit can also have other implementation manners, such as WIFI connection.

[0080] In addition, a position sensor can also be arranged to detect the position of the oil return hole valve plate 1, so as to monitor in real time whether the oil return hole valve plate 1 moves to the specified position according to the preset instruction, if not, the signal of the fault of the oil return hole valve plate 1 can be output to the engine control unit, so that the user can timely maintenance treatment, and ensure the normal work of the electric control silicon oil fan clutch.

[0081] The specific circuit structure and control strategy of the controller are the prior art known by those skilled in the art, and will not be described here.

[0082] Please refer to Figure 6 , Figure 6 To Figure 1Control logic diagram of oil return hole valve plate in oil return control mechanism.

[0083] The application also provides a control method of the electrically controlled silicone oil fan clutch, which is suitable for the electrically controlled silicone oil fan clutch. When one of the following first preset conditions is met, the first electromagnetic component drives the oil return hole valve plate 1 to move in the axial direction to adjust the oil return area of the oil return channel to the maximum value.

[0084] The difference between the actual fan speed and the preset fan speed exceeds the preset speed difference value;

[0085] The average load rate of the engine within 5s is not greater than the preset load rate value, the actual water temperature is not greater than the preset water temperature value, and the actual fuel injection amount is not greater than the preset fuel injection amount value;

[0086] The actual water temperature is not greater than the preset water temperature value, the vehicle driving acceleration is not less than the preset acceleration value, and the vehicle driving speed is not greater than the preset speed value.

[0087] When the difference between the actual fan speed and the preset fan speed exceeds the preset speed difference value, that is, the actual fan speed exceeds the fan speed demand, the fan speed needs to be reduced, at this time, the oil return area of the oil return channel a can be controlled to the maximum value, so that the silicone oil can flow back to the oil storage cavity quickly, so as to reduce the fan speed faster, so that the actual fan speed and the preset fan speed are lower than the preset speed difference value. In a specific embodiment, the preset speed difference value is 100 revolutions.

[0088] When the average load rate of the engine within 5s is not greater than the preset load rate value, the actual water temperature is not greater than the preset water temperature value, and the actual fuel injection amount is not greater than the preset fuel injection amount value, under the condition that the three sub-conditions are met at the same time, it is indicated that the vehicle is in the idling condition or the engine is in the starting condition, and cooling and heat dissipation through the fan are not needed, and the oil return area of the oil return channel a can be controlled to the maximum value, so that the silicone oil can flow back to the oil storage cavity quickly, so as to reduce the fan speed faster or make the fan stop. In a specific embodiment, the preset load rate value is 25, the preset water temperature value is 98, and the preset fuel injection amount is 5.

[0089] When the actual water temperature is not greater than the preset water temperature value, the vehicle driving acceleration is not less than the preset acceleration value, and the vehicle driving speed is not greater than the preset speed, under the condition that the three sub-conditions are met at the same time, it is indicated that the engine is in the acceleration starting stage, cooling and heat dissipation through the fan are not needed, so as to prevent the fan from occupying the engine torque and affecting the vehicle power, and the oil return area of the oil return channel a can be controlled to the maximum value, so that the silicone oil can flow back to the oil storage cavity quickly, so as to reduce the fan speed faster or make the fan stop. In a specific embodiment, the preset water temperature value is 98, the preset acceleration value is 2, and the preset speed is 30.

[0090] Therefore, the control method of the electric control silicone oil fan clutch can adjust the oil return area of the oil return channel a to the maximum value in the preset working condition, so that the silicone oil can quickly flow back to the oil storage cavity, reduce noise, improve ride comfort, reduce fuel consumption, improve the economy of the whole vehicle, avoid the torque occupied by the fan, and ensure the power performance of the whole vehicle.

[0091] In addition, after adjusting the position of the oil return hole valve plate 1, whether the oil return hole valve plate 1 is in the preset position can be monitored, and if not, a fault signal is outputted, so that the user can timely maintenance treatment, and ensure that the electric control silicone oil fan clutch works normally.

[0092] Please refer to Figure 7 , Figure 7 for Figure 1 the control logic diagram when the electromagnetic power generation of the oil return control mechanism is performed.

[0093] Further, the control method of the electric control silicone oil fan clutch can close the control switch when one of the following second preset conditions is met, the coil 6, the control switch and the energy storage unit form a closed loop, the coil 6 cuts the magnetic induction lines generated by the relative movement of the first electromagnetic component and the second electromagnetic component 5 to supply power to the energy storage unit, and the second preset condition includes:

[0094] The energy storage unit has an energy storage value not greater than a preset energy storage value, indicating that the energy storage unit has too low energy storage at this time, and electromagnetic power generation is needed; in one specific embodiment, the preset energy storage value is 10%.

[0095] The energy storage unit has an energy storage value within a preset range, and the engine speed difference from the engine idle speed exceeds a preset engine speed difference value, and the actual water temperature value is not greater than a preset water temperature value, and the vehicle is in a stationary state, and the engine is in a cold start state, and the oil temperature is not greater than a preset oil temperature value; only when all the six sub-conditions are met, it is proved that the vehicle is in a cold start warm-up stage, and the energy storage unit has low energy storage, and electromagnetic power generation can be performed; in one specific embodiment, the energy storage value is 50%-95%, the preset speed difference value is 10, and the preset water temperature value is 60.

[0096] The energy storage unit has an energy storage value within a preset range, and the engine output torque is not greater than a preset output torque value, and the vehicle slope is not greater than a preset slope value; when all the three sub-conditions are met, it is proved that the vehicle is in a downhill state, and electromagnetic power generation can be performed; in one specific embodiment, the energy storage value is 50%-95%, the preset output torque value is 0, and the preset slope value is-5.

[0097] The vehicle is in a braking state.

[0098] The control method of the electric control silicone oil fan clutch can utilize electromagnetic power generation to supplement the electric energy of the energy storage unit when one of the second preset conditions is met, so as to ensure the normal work of the oil return control mechanism and realize the full utilization of electromagnetic resources; when none of the second preset conditions is met, it proves that power generation is not needed at this time, the control switch is turned off, the cutting magnetic induction line movement is not performed, and the torque loss of the engine is reduced.

[0099] It can be understood that the above values are empirical values, and in actual application, factors such as heat dissipation effect, ride comfort, vehicle economy, vehicle power performance, etc. can be considered for adaptive adjustment.

[0100] The electric control silicone oil fan clutch and the control method thereof provided by the application are described in detail above, specific examples are applied in this paper to describe the principles and implementation modes of the application, and the above examples are only used to help understand the method and core idea of the application. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. An electrically controlled silicone oil fan clutch, comprising a housing, a working cavity, an oil storage cavity and an oil return passage (a) arranged inside the housing, the oil return passage (a) communicating the working cavity and the oil storage cavity, characterized in that, an oil return control mechanism is further arranged, the oil return control mechanism comprising an oil return hole valve plate (1), an elastic component (2) and a first electromagnetic component, the oil return hole valve plate (1) is arranged inside the oil storage cavity and connected to the inner wall of the housing through the elastic component (2), the first electromagnetic component is correspondingly arranged on the outer wall of the housing, the first electromagnetic component and the elastic component (2) can drive the oil return hole valve plate (1) to move axially to adjust the oil return area of the oil return passage (a); an oil inlet passage is further arranged inside the housing, the oil inlet passage communicates the working cavity and the oil storage cavity, and an oil inlet control mechanism is further arranged, the oil inlet control mechanism comprising an oil inlet hole valve plate and a second electromagnetic component (5), the second electromagnetic component (5) can drive the oil inlet hole valve plate to move axially to adjust the oil inlet area of the oil inlet passage, the first electromagnetic component comprises a coil (6) connected with an electric power, a control switch and an energy storage unit, the control switch is closed or opened, the coil (6), the control switch and the energy storage unit can form a closed loop or be disconnected, the coil (6) is located in the magnetic field of the second electromagnetic component (5), when the first electromagnetic component and the second electromagnetic component (5) move relatively, the coil (6) can cut the magnetic induction lines generated by the second electromagnetic component (5) to supply power to the energy storage unit, the energy storage unit can also supply power to the coil (6), the coil (6) generates magnetic force when electrified to attract the oil return hole valve plate (1) to move axially. the housing comprises a front cover (3) and a driven plate (4) integrally formed inside the front cover (3), the oil return passage (a) is arranged between the front cover (3) and the driven plate (4), the front cover (3) and the driven plate (4) have a cavity near the radial middle part, the outer wall of the cavity is convex from inside to outside to form a convex part (b), the oil return hole valve plate (1) is connected to the inner side of the end wall of the convex part (b) through the elastic component (2), the area inside the oil return hole valve plate (1) in the cavity forms the oil storage cavity, 2. The electrically controlled silicone oil fan clutch of claim 1, wherein, the oil return hole valve plate (1) moves axially and can switch between a first position and a second position, in the first position, the oil return hole valve plate (1) partially blocks the oil return passage (a); in the second position, the oil return hole valve plate (1) is entirely located in the convex part (b) and is axially staggered with the oil return passage (a). the inner circumferential wall diameter of the convex part (b) gradually decreases from inside to outside, the oil return hole valve plate (1) is a circular basin structure towards the inner end, comprising a bottom and a side part enclosed around the outer periphery of the bottom, the diameter of the side part gradually increases away from the bottom.

3. The electrically controlled silicone oil fan clutch of claim 2, wherein, ​ 4. The electrically controlled silicone oil fan clutch of claim 2, wherein, The end wall of the driven plate (4) facing the front cover (3) extends to the radially inner side of the opening end of the protruding part (b), and the end wall of the driven plate (4) facing the front cover (3) is provided with a notch groove (3a) for forming part of the oil return channel (a). When the oil return hole valve plate (1) is in the first position, the oil return hole valve plate (1) is in close contact with the driven plate (4), and the oil return area of the oil return channel (a) is the cross-sectional area of the notch groove (3a).

5. The electrically controlled silicone oil fan clutch of claim 1 wherein, The opposite end of the oil return hole valve plate (1) and the second electromagnetic component (5) is a same magnetic pole, and the opposite end of the oil return hole valve plate (1) and the coil (6) is a different magnetic pole.

6. The electrically controlled silicone oil fan clutch of any one of claims 1-4, wherein, Further comprising a controller, which is electrically connected with the first electromagnetic component, and is also electrically connected with an engine control unit.

7. The electrically controlled silicone oil fan clutch of claim 6 wherein, The controller is provided with a first Bluetooth module, which is Bluetooth connected with a second Bluetooth module provided on the engine control unit.

8. A control method for an electronically controlled silicone oil fan clutch, applicable to the electronically controlled silicone oil fan clutch according to any one of claims 1 to 7, characterized in that: When one of the following first preset conditions is met, the first electromagnetic component drives the oil return hole valve plate (1) to move axially to adjust the oil return area of the oil return channel (a) to a maximum value; The first preset conditions include: The difference between the actual fan speed and the preset fan speed exceeds the preset fan speed difference value; The average load rate of the engine within 5s is not greater than a preset load rate value, the actual water temperature is not greater than a preset water temperature value, and the actual fuel injection amount is not greater than a preset fuel injection amount value; The actual water temperature is not greater than a preset water temperature value, the vehicle driving acceleration is not less than a preset acceleration value, and the vehicle driving speed is not greater than a preset speed value; When one of the following second preset conditions is met, the control switch is controlled to be closed, the coil (6), the control switch and the energy storage unit form a closed loop, the coil (6) cuts the magnetic induction lines generated by the relative motion of the first electromagnetic component and the second electromagnetic component (5) to power the energy storage unit, and the second preset conditions include: The electric quantity of the energy storage unit is not greater than a preset electric quantity value; The electric quantity of the energy storage unit is within a preset range, the difference between the engine speed and the engine idle speed exceeds a preset engine speed difference value, the actual water temperature value is not greater than a preset water temperature value, the vehicle is in a stationary state, the engine is in a cold start state, and the oil temperature is not greater than a preset oil temperature value; The electric quantity of the energy storage unit is within a preset range, the output torque of the engine is not greater than a preset output torque value, and the vehicle slope is not greater than a preset slope value; The vehicle is in a braking state.

9. The method of claim 8, wherein the method further comprises: Monitoring whether the oil return hole valve plate (1) is in a preset position, and if not, outputting an oil return hole valve plate (1) fault signal.

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