CN114810317B - Control method and control system for silicone oil fan clutch - Google Patents
Control method and control system for silicone oil fan clutch Download PDFInfo
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- CN114810317B CN114810317B CN202210435340.1A CN202210435340A CN114810317B CN 114810317 B CN114810317 B CN 114810317B CN 202210435340 A CN202210435340 A CN 202210435340A CN 114810317 B CN114810317 B CN 114810317B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
- F01P7/042—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using fluid couplings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
Abstract
The invention relates to a control method and a control system of a silicone oil fan clutch, wherein the control method of the silicone oil fan clutch comprises the following steps: acquiring the actual rotating speed of a fan and the actual rotating speed of an engine; comparing the actual rotation speed of the fan with a first preset rotation speed; when the actual rotating speed is greater than the first preset rotating speed, the actual rotating speed of the engine is controlled to be increased to the second preset rotating speed so as to increase the actual rotating speed of the fan, and the fan is disconnected with the silicone oil fan clutch; the first preset rotating speed is a critical rotating speed when the fan is changed from a working state to a stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch. In this application, when the actual rotational speed of fan is greater than first default rotational speed, through the actual rotational speed with the engine promote fast to the second default rotational speed for silicone oil fan clutch breaks off fast, shortens the cold start separation time of silicone oil fan clutch by a wide margin, reduces the unnecessary high-speed operating time of fan, reduces the engine oil consumption.
Description
Technical Field
The invention relates to the technical field of vehicle control, in particular to a control method and a control system for a silicone oil fan clutch.
Background
When the vehicle is in a working state, the engine continuously generates heat, and if the heat is too large, the normal running of the vehicle can be influenced. Therefore, in order to control the engine temperature, a cooling fan is often provided inside the vehicle, and the cooling fan is determined based on the air volume required for the maximum heat load condition of the engine.
In addition, in order to adapt to the requirements of different working conditions on cooling air quantity, a fan clutch is generally arranged in the cooling fan in a matching way. However, in order to meet the optimum operating temperature requirements of the engine and reduce the cooling fan power consumption, the fan clutch is typically provided as a silicone oil fan clutch capable of precisely controlling the cooling fan rotational speed.
Although the silicone oil fan clutch can control the cooling fan at a proper rotation speed according to the required rotation speed of the fan when the vehicle normally runs, if the silicone oil fan clutch is in a coupling state due to the influence of the separation hysteresis of the silicone oil fan clutch, when the engine is in a flameout state, the silicone oil fan clutch still keeps the coupling state and cannot be separated quickly, so that the fuel consumption of the engine is increased.
Disclosure of Invention
Accordingly, it is necessary to provide a method and a system for controlling a silicone oil fan clutch, which solve the problem that the conventional silicone oil fan clutch cannot be quickly separated, resulting in an increase in fuel consumption of an engine.
In a first aspect, the present application provides a method for controlling a silicone oil fan clutch, including the steps of:
acquiring the actual rotating speed of a fan and the actual rotating speed of an engine;
comparing the actual rotation speed of the fan with a first preset rotation speed;
when the actual rotating speed of the fan is larger than the first preset rotating speed, controlling the actual rotating speed of the engine to be increased to a second preset rotating speed so as to increase the actual rotating speed of the fan, and disconnecting the clutch with the silicone oil fan;
the first preset rotating speed is a critical rotating speed when the fan is converted from a working state to a stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch.
In some embodiments, before the step of obtaining the actual rotation speed of the fan, the method further includes the steps of:
the actual rotational speed of the engine is controlled to be equal to the idle rotational speed.
In some embodiments, before the step of obtaining the actual rotation speed of the fan, the method further includes the steps of:
acquiring an actual water temperature value of the engine, and controlling the actual water temperature value of the engine to be smaller than a preset water temperature value;
the preset water temperature value is a water temperature value when the engine is started in a cold mode.
In some embodiments, before the step of obtaining the actual rotation speed of the fan, the method further includes the steps of:
and acquiring the actual speed of the vehicle, and controlling the actual speed of the vehicle to be equal to zero.
In some embodiments, before the step of obtaining the actual rotation speed of the fan, the method further includes the steps of:
and acquiring an actual gear of the gearbox, and controlling the actual gear of the gearbox to be neutral.
In a second aspect, the present application provides a silicone oil fan clutch control system for controlling the opening and closing of a silicone oil fan clutch on a vehicle, the vehicle including a fan, an engine drivingly connected with the fan, and a silicone oil fan clutch disposed within the fan, the silicone oil fan clutch control system comprising:
a first rotation speed detector for detecting an actual rotation speed of the fan;
the control unit is in communication connection with the first rotation speed detector and is used for comparing the actual rotation speed of the fan with a first preset rotation speed and controlling the actual rotation speed of the engine to rise to a second preset rotation speed when the actual rotation speed of the fan is larger than the first preset rotation speed so as to rise the actual rotation speed of the fan;
the first preset rotating speed is a critical rotating speed when the fan is converted from a working state to a stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch.
In some embodiments, the silicone oil fan clutch control system includes a second speed detector for detecting an actual speed of the engine, the second speed detector being communicatively coupled to the control unit.
In some embodiments, the silicone oil fan clutch control system includes a water temperature detector for detecting an actual water temperature value of the engine, the water temperature detector being communicatively connected to the control unit.
In some embodiments, the silicone oil fan clutch control system includes a vehicle speed detector for detecting an actual vehicle speed of the vehicle, the vehicle speed detector being communicatively coupled to the control unit.
In some embodiments, the silicone oil fan clutch control system includes a gear detector for detecting an actual gear of the vehicle gearbox, the gear detector being communicatively connected to the control unit.
According to the control method and the control system for the silicone oil fan clutch, the first preset rotating speed is the critical rotating speed when the fan is changed from the working state to the stop state, so that when the actual rotating speed of the fan is larger than the first preset rotating speed, the fan is in the working state, namely the silicone oil fan clutch is in the coupling state, and at the moment, the actual rotating speed of the engine is quickly lifted to the second preset rotating speed, so that the silicone oil fan clutch is quickly disconnected, the cold start separation time of the silicone oil fan clutch is greatly shortened, the unnecessary high-speed running time of the fan is shortened, and the oil consumption of the engine is reduced.
Drawings
Fig. 1 is a flowchart of a method for controlling a silicone oil fan clutch according to an embodiment of the present application.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Fig. 1 shows a flowchart of a silicone oil fan clutch control method in an embodiment of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a method for controlling a silicone oil fan clutch, including the steps of:
s5: acquiring the actual rotating speed of a fan and the actual rotating speed of an engine;
s6: comparing the actual rotation speed of the fan with a first preset rotation speed;
s7: when the actual rotating speed of the fan is larger than the first preset rotating speed, the actual rotating speed of the engine is controlled to be increased to the second preset rotating speed, so that the actual rotating speed of the fan is increased, and the clutch is disconnected with the silicone oil fan; the first preset rotating speed is a critical rotating speed when the fan is changed from a working state to a stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch.
The silicone oil fan clutch is generally disposed inside the fan and is used to control the rotational speed of the fan. The silicone oil fan clutch is internally sealed and filled with a viscous fluid, which may be silicone oil, which transfers torque by virtue of the shear adhesion of the viscous fluid.
Further, the silicone oil fan clutch is internally provided with a working cavity and a plurality of oil storage cavities uniformly distributed on the circumference of the working cavity. When the engine drives the fan to rotate, the silicone oil in the working cavity in the silicone oil fan clutch is transferred to the oil storage cavity from the working cavity under the action of centrifugal force, and meanwhile, the silicone oil fan clutch is changed from a coupling state to a disconnection state. Thereby, the silicone oil fan clutch controls the fan to stop operating.
Specifically, the fan may be a cooling fan for engine heat dissipation on a vehicle. Based on the above, the fan can be driven to rotate by the engine, and then the coupling and the disconnection of the silicone oil fan clutch can be controlled by controlling the rotating speed of the fan.
It will be appreciated that in some other embodiments, the fan may be a fan other than a vehicle cooling fan, and will not be described in detail herein.
Since the first preset rotation speed is the critical rotation speed when the fan is changed from the working state to the stop state, that is, when the actual rotation speed of the fan is less than or equal to the first preset rotation speed, the fan is in the stop state and is not started to work. When the actual rotation speed of the fan is larger than the first preset rotation speed, the fan is in a working state.
Therefore, after the actual rotation speed of the fan is obtained, the actual rotation speed of the fan is first compared with the first preset rotation speed. When the actual rotation speed of the fan is larger than the first preset rotation speed, the fan is in a working state at the moment. It will be appreciated that the silicone fan clutch within the fan must be in a coupled state when the fan is in operation.
At this time, the actual rotation speed of the engine can be controlled to the second preset rotation speed, the engine drives the fan and rapidly increases the actual rotation speed of the fan, so that the silicone oil in the silicone oil fan clutch rapidly moves from the working cavity to the oil storage cavity under the action of centrifugal force, and the silicone oil fan clutch is rapidly disconnected, so that the fan is rapidly closed.
It can be appreciated that, although the process of controlling the actual rotation speed of the engine to the second preset rotation speed can increase the oil consumption of the engine in a short time, the time for the engine to reach the second preset rotation speed is very short, and the whole process of the engine reaching the second preset rotation speed, the rapid increase of the rotation speed of the engine driving fan and the rapid disconnection of the silicone oil fan clutch is completed in a very short time. Compared with the long-time operation of the engine at a lower rotating speed, thereby leading to longer separation time of the silicone oil fan clutch, the cold start separation time of the silicone oil fan clutch can be greatly shortened, the unnecessary high-speed operation time of the fan is reduced, and the oil consumption of the engine can be reduced.
In some embodiments, at step S5: before the actual rotation speed of the fan is obtained, the method further comprises the steps of:
s1: the actual rotational speed of the engine is controlled to be equal to the idle rotational speed.
It should be noted that, during normal running of the vehicle, the silicone oil fan clutch can control the fan at a proper rotational speed according to the required rotational speed of the fan. However, because the silicone oil fan clutch has the problem of separation hysteresis, the silicone oil fan clutch is in a coupling state in the working process of the fan, and at the moment, when the engine is flameout, the silicone oil fan clutch still remains in the coupling state and cannot be rapidly separated. When the engine is cold started next, the silicone oil fan clutch remains in the coupled state at this time, although fan operation is not required, so that the fan is still operating at a high rotational speed. In addition, because the rotational speed of the engine is low at this time, the silicone oil fan clutch can be disengaged for several minutes, thereby increasing the fuel consumption of the engine.
Therefore, it is necessary to ensure that the vehicle is in an idle state before controlling the actual rotational speed of the engine to the second preset rotational speed so as to control the silicone oil fan clutch to be disconnected. The actual rotation speed of the engine is controlled to be equal to the idle rotation speed, so that the vehicle is ensured to be in an idle state, and the disconnection of the silicone oil fan clutch is smoothly realized.
In some embodiments, at step S5: before the actual rotation speed of the fan is obtained, the method further comprises the steps of:
s2: and acquiring an actual water temperature value of the engine, and controlling the actual water temperature value of the engine to be smaller than a preset water temperature value. The preset water temperature value is a water temperature value when the engine is started in a cold mode.
Since the actual water temperature value of the engine can reflect the start time of the engine, whether the engine is in a cold start state or not can be ensured through the step S2, and therefore the disconnection of the silicone oil fan clutch can be smoothly realized.
In some embodiments, at step S5: before the actual rotation speed of the fan is obtained, the method further comprises the steps of:
s3: the actual speed of the vehicle is obtained, and the actual speed of the vehicle is controlled to be equal to zero.
On the one hand, when the vehicle is running normally, i.e. the actual speed of the vehicle is greater than zero, the fan needs to be controlled to run normally by the silicone oil fan clutch, and at this time, the silicone oil fan clutch does not need to be disconnected. On the other hand, if the silicone oil fan clutch is disconnected due to an erroneous operation during normal running of the vehicle, the running state of the vehicle is affected, and there is a potential safety hazard.
Based on the two considerations, before the actual rotation speed of the fan is obtained, the actual speed of the vehicle is ensured to be equal to zero, namely, the vehicle is ensured to be in a stopped and warmed-up state, so that the silicone oil fan clutch disconnection process can be safer.
In some embodiments, at step S5: before the actual rotation speed of the fan is obtained, the method further comprises the steps of:
s4: and acquiring the actual gear of the gearbox, and controlling the actual gear of the gearbox to be neutral.
Before the actual rotation speed of the fan is obtained, the actual gear of the gearbox is firstly ensured to be neutral, and the fact that the vehicle is not started suddenly in the process of controlling the actual rotation speed of the engine to the second preset rotation speed can be ensured, so that the safety of the control process is improved.
Based on the same conception as the control method of the silicone oil fan clutch, the application also provides a control system of the silicone oil fan clutch, which is used for controlling the on-off of the silicone oil fan clutch on a vehicle. The vehicle comprises a fan, an engine connected with the fan in a driving way and a silicone oil fan clutch arranged in the fan. The silicone oil fan clutch control system comprises a first rotation speed detector and a control unit, wherein the first rotation speed detector is connected with the control unit through communication, the first rotation speed detector is used for detecting the actual rotation speed of a fan, the control unit is used for comparing the actual rotation speed of the fan with a first preset rotation speed, and when the actual rotation speed of the fan is larger than the first preset rotation speed, the control unit is used for controlling the actual rotation speed of an engine to a second preset rotation speed so as to improve the actual rotation speed of the fan.
In addition, the first preset rotating speed is a critical rotating speed when the fan is changed from the working state to the stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch.
It should be noted that, the specific value of the first preset rotational speed may be obtained through experiments, and the first preset rotational speed is set in the control unit in advance.
Specifically, the first rotational speed detector detects an actual rotational speed of the fan and sends the actual rotational speed value to the control unit. The control unit can compare the actual rotation speed of the fan with the first preset rotation speed in the interior, and after the comparison, if the actual rotation speed of the fan is greater than the first preset rotation speed, the fan is in a working state, namely the silicone oil fan clutch is in a coupling state. At this time, the actual rotating speed of the engine is controlled by the control unit to be quickly increased to a second preset rotating speed, so that the actual rotating speed of the engine driving the fan is quickly increased, and the silicone oil in the working cavity of the silicone oil fan clutch is quickly transferred to the oil storage cavity under the action of centrifugal force, so that the silicone oil fan clutch is quickly disconnected. When the silicone oil fan clutch is disconnected, the fan can be controlled to be quickly changed from a working state to a stop state.
At this time, the actual rotation speed of the fan is measured again by the first rotation speed detector, and if the actual rotation speed of the fan is smaller than or equal to the first preset rotation speed, the silicone oil fan clutch is successfully disconnected. If the actual rotation speed of the fan is still greater than the first preset rotation speed, the control unit controls the actual rotation speed of the engine to be rapidly increased to the second preset rotation speed again, namely, the operation step S7 is repeated until the actual rotation speed of the fan is smaller than or equal to the first preset rotation speed.
In some embodiments, the silicone oil fan clutch control system includes a second speed detector for detecting an actual speed of the engine, the second speed detector being communicatively coupled to the control unit.
Before the actual rotational speed of the fan is measured by the first rotational speed detector, the actual rotational speed of the engine is first detected by the second rotational speed detector and sent to the control unit. The control unit can compare the detection value of the second rotation speed detector with the preset idle rotation speed in the second rotation speed detector, when the detection value of the second rotation speed detector, namely the actual rotation speed of the engine, is equal to the idle rotation speed, the vehicle is in an idle state at the moment, and then the next operation step can be carried out, otherwise, the actual rotation speed of the engine needs to be adjusted.
In some embodiments, the silicone oil fan clutch control system includes a water temperature detector for detecting an actual water temperature value of the engine, the water temperature detector being communicatively coupled to the control unit.
When the detected value of the second rotation speed detector, that is, the actual rotation speed of the engine is equal to the idle rotation speed, the actual water temperature value of the engine can be detected by the water temperature detector, and the actual water temperature value of the engine is sent to the control unit. The control unit may compare the measured value of the water temperature sensor, i.e. the actual water temperature value of the engine with a preset water temperature value preset inside the engine. When the actual water temperature value of the engine is smaller than the preset water temperature value, the engine is in a cold start state at the moment, the next operation step can be carried out, and otherwise, the state of the engine needs to be adjusted.
In some embodiments, the silicone oil fan clutch control system includes a vehicle speed detector for detecting an actual vehicle speed of the vehicle, the vehicle speed detector being in communication with the control unit.
When the actual water temperature value of the engine is smaller than the preset water temperature value, namely, the engine is in a cold start state, the actual speed of the vehicle can be measured through the speed detector, and the measured value of the speed detector, namely, the value of the actual speed of the vehicle is sent to the control unit. The control unit may determine an actual vehicle speed of the vehicle, and when the actual vehicle speed of the vehicle is equal to zero, it indicates that the vehicle is in a stopped and warmed-up state at this time, and then the next operation step may be performed, otherwise, the actual vehicle speed of the vehicle needs to be adjusted to zero.
In some embodiments, the silicone oil fan clutch control system includes a gear detector for detecting an actual gear of the vehicle transmission, the gear detector being communicatively coupled to the control unit.
When the actual vehicle speed of the vehicle is equal to zero, i.e. the vehicle is in a stopped warm state, the actual gear of the gearbox is measured by the gear detector and the measured value of the gear detector, i.e. the actual gear value of the gearbox, is sent to the control unit. The control unit can judge the actual gear of the gearbox, and can enter the next operation step when the actual gear of the gearbox is neutral, otherwise, the actual gear of the gearbox is required to be adjusted to be neutral.
When the vehicle is in an idling state, the actual rotation speed of the engine is compared with the preset idling rotation speed in the engine through the control unit, and when the actual rotation speed of the engine is equal to the idling rotation speed, the vehicle is in the idling state. Further, the actual water temperature value of the engine is detected through the water temperature detector, the actual water temperature value of the engine is compared with a preset water temperature value preset in the engine through the control unit, and when the actual water temperature value of the engine is smaller than the preset water temperature value, the engine is in a cold start state.
Further, the actual vehicle speed of the vehicle is detected by the vehicle speed detector, and judgment is made by the control unit, and when the actual vehicle speed of the vehicle is equal to zero, it is interpreted that the vehicle is in the stopped warmed-up state at this time. Next, the actual gear of the gearbox is detected by the gear detector, and judged by the control unit, and when the actual gear of the gearbox is neutral, the next operation can be performed.
The vehicle is ensured to be in a safe state through the above steps, thereby, the actual rotation speed of the fan is detected through the first rotation speed detector, and the actual rotation speed of the fan is compared with a first preset rotation speed preset in the control unit. When the actual rotation speed of the fan is larger than the first preset rotation speed, the fan is in a working state, namely the silicone oil fan clutch is in a coupling state. At this time, the actual rotating speed of the engine is controlled by the control unit to be quickly increased to a second preset rotating speed, so that the actual rotating speed of the engine driving the fan is quickly increased, and the silicone oil in the working cavity of the silicone oil fan clutch is quickly transferred to the oil storage cavity under the action of centrifugal force, so that the silicone oil fan clutch is quickly disconnected. When the silicone oil fan clutch is disconnected, the fan can be controlled to be quickly changed from a working state to a stop state.
The control method and the control system of the silicone oil fan clutch in the embodiment have at least the following advantages:
1) When the engine is in a cold start state, the actual rotating speed of the engine is controlled to be quickly increased to a second preset rotating speed, so that the actual rotating speed of the fan is increased, and the silicone oil fan clutch can be quickly disconnected, thereby greatly shortening the cold start separation time of the silicone oil fan clutch, reducing the unnecessary high-speed running time of the fan, and further reducing the oil consumption of the engine;
2) Before the actual rotation speed of the engine is controlled to rise to a second preset rotation speed, the vehicle is ensured to be in an idle state, so that the stable operation of the engine in the control process and the smooth running of the control process are ensured;
3) Before the actual rotation speed of the engine is controlled to rise to the second preset rotation speed, the vehicle is ensured to be in a cold start state, so that the silicone oil fan clutch is ensured to be correctly and smoothly disconnected;
4) Before the actual rotational speed of the control engine is raised to the second preset rotational speed, the vehicle is ensured to be in a stopped warmed-up state, and the transmission gear is ensured to be neutral, thereby ensuring safety during control.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (6)
1. A silicone oil fan clutch control method, characterized by comprising the steps of:
a silicone oil fan clutch is arranged in a fan, and an engine drives the fan to rotate;
acquiring the actual rotation speed of the engine, and controlling the actual rotation speed of the engine to be equal to the idle rotation speed;
acquiring an actual water temperature value of the engine, and controlling the actual water temperature value of the engine to be smaller than a preset water temperature value; the preset water temperature value is a water temperature value when the engine is started in a cold mode;
acquiring the actual speed of a vehicle, and controlling the actual speed of the vehicle to be equal to zero;
acquiring an actual gear of a gearbox, and controlling the actual gear of the gearbox to be neutral;
acquiring the actual rotating speed of the fan, and comparing the actual rotating speed of the fan with a first preset rotating speed;
when the actual rotating speed of the fan is larger than the first preset rotating speed, the silicone oil fan clutch is in a coupling state;
the actual rotating speed of the engine is controlled to be increased to a second preset rotating speed so as to increase the actual rotating speed of the fan, the silicone oil in the silicone oil fan clutch is transferred from the working cavity to the oil storage cavity, and the silicone oil fan clutch is converted from a coupling state to a disconnection state, so that the fan stops working;
the first preset rotating speed is a critical rotating speed when the fan is converted from a working state to a stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch.
2. The method according to claim 1, wherein in the step of controlling the actual rotational speed of the engine to rise to a second preset rotational speed to raise the actual rotational speed of the fan, the silicone oil in the silicone oil fan clutch is transferred from the working chamber to the oil storage chamber, the silicone oil fan clutch is changed from the coupled state to the decoupled state, and the working chamber and the oil storage chamber are both opened inside the silicone oil fan clutch, and the oil storage chamber is uniformly distributed in the circumferential direction of the working chamber.
3. The silicone oil fan clutch control method according to claim 1, characterized in that the fan is configured as a cooling fan provided on the vehicle for radiating heat from the engine.
4. A silicone oil fan clutch control system for controlling the opening and closing of a silicone oil fan clutch on a vehicle, the vehicle including a fan, an engine drivingly connected to the fan, and a silicone oil fan clutch disposed within the fan, the silicone oil fan clutch control system comprising:
a second rotation speed detector for detecting an actual rotation speed of the engine;
a water temperature detector for detecting an actual water temperature value of the engine;
a vehicle speed detector for detecting an actual vehicle speed of the vehicle;
a gear detector for detecting an actual gear of the vehicle transmission;
a first rotation speed detector for detecting an actual rotation speed of the fan;
the control unit is respectively in communication connection with the first rotating speed detector, the second rotating speed detector, the water temperature detector, the vehicle speed detector and the gear position detector, and is used for comparing the actual rotating speed of the fan with a first preset rotating speed, and controlling the actual rotating speed of the engine to rise to a second preset rotating speed when the actual rotating speed of the fan is larger than the first preset rotating speed so as to rise the actual rotating speed of the fan;
the first preset rotating speed is a critical rotating speed when the fan is converted from a working state to a stopping state, and the second preset rotating speed is a minimum rotating speed when the engine drives the fan to be disconnected with the silicone oil fan clutch.
5. The silicone oil fan clutch control system of claim 4, wherein the silicone oil fan clutch is internally provided with a working chamber and an oil storage chamber, and the oil storage chamber is uniformly distributed in the circumferential direction of the working chamber.
6. The silicone oil fan clutch control system of claim 4, wherein the fan is configured as a cooling fan provided on the vehicle for dissipating heat from the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210435340.1A CN114810317B (en) | 2022-04-24 | 2022-04-24 | Control method and control system for silicone oil fan clutch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210435340.1A CN114810317B (en) | 2022-04-24 | 2022-04-24 | Control method and control system for silicone oil fan clutch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114810317A CN114810317A (en) | 2022-07-29 |
| CN114810317B true CN114810317B (en) | 2023-05-12 |
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| CN202210435340.1A Active CN114810317B (en) | 2022-04-24 | 2022-04-24 | Control method and control system for silicone oil fan clutch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4124435B2 (en) * | 2002-11-11 | 2008-07-23 | 日野自動車株式会社 | Control device for vehicle fan clutch |
| JP5759726B2 (en) * | 2011-01-20 | 2015-08-05 | 日野自動車株式会社 | Fan clutch control method and apparatus |
| CN108071476B (en) * | 2017-12-06 | 2023-06-06 | 东风商用车有限公司 | Silicone oil fan clutch control system and control method thereof |
| CN207945010U (en) * | 2018-03-15 | 2018-10-09 | 雪龙集团股份有限公司 | A kind of energy-saving fan clutch |
| CN110925073A (en) * | 2019-11-27 | 2020-03-27 | 东风商用车有限公司 | Engine cooling fan control system |
| CN112145278B (en) * | 2020-06-30 | 2022-03-15 | 东风马勒热系统有限公司 | Electric control silicone oil fan clutch of hybrid power type motor |
| CN113586223B (en) * | 2021-08-27 | 2022-11-29 | 潍柴动力股份有限公司 | Rotating speed control method and device of electric control silicone oil fan and vehicle |
| CN114033545B (en) * | 2021-10-27 | 2022-10-11 | 昆山三一动力有限公司 | Control method and device of electric control silicone oil fan in idle speed mode |
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