CN108071476B - Silicone oil fan clutch control system and control method thereof - Google Patents
Silicone oil fan clutch control system and control method thereof Download PDFInfo
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- CN108071476B CN108071476B CN201711278167.4A CN201711278167A CN108071476B CN 108071476 B CN108071476 B CN 108071476B CN 201711278167 A CN201711278167 A CN 201711278167A CN 108071476 B CN108071476 B CN 108071476B
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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
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
- F01P7/081—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches
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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
- F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives
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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
- F01P2050/00—Applications
- F01P2050/22—Motor-cars
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
A silicone oil fan clutch control system comprises an engine, a mechanical clutch, an electric control silicone oil clutch, a pneumatic device, an electromagnetic valve and an electronic control unit, wherein the engine is mechanically connected with the electric control silicone oil clutch after sequentially passing through a fan belt pulley and the mechanical clutch, the electric control silicone oil clutch is connected with a fan, the mechanical clutch is mechanically connected with the pneumatic device, the pneumatic device is connected with an electromagnetic valve gas circuit, the electromagnetic valve is electrically connected with the electronic control unit after sequentially passing through an anti-shake processing unit and a control switch, and the electronic control unit is electrically connected with the electric control silicone oil clutch; when the fan is not needed to run, the electronic control unit controls the electromagnetic valve to be opened, the pneumatic device works, the mechanical clutch is separated, the power transmission between the engine and the electrically controlled silicone oil clutch is cut off, and the rotating speed of the fan is zero. The design not only solves the problem that the electrically controlled silicone oil fan clutch cannot be completely separated, improves the economy of the vehicle and the reliability of the engine, but also improves the control accuracy.
Description
Technical Field
The utility model relates to a silicone oil fan clutch, in particular to a silicone oil fan clutch control system and a control method thereof, which are mainly suitable for solving the problem that an electric control silicone oil fan clutch cannot be completely separated, thereby improving the economical efficiency of a vehicle and the reliability of an engine.
Background
The cooling air quantity of the engine cooling fan is determined based on the cooling air quantity required by the maximum heat load working condition of the engine, and the actually designed cooling air quantity is larger in order to ensure the normal running of the automobile. When the automobile runs under other working conditions, the cooling air quantity is excessive, and even the engine is supercooled. Therefore, in order to reduce the power consumption of the cooling fan and prevent the engine from being supercooled, the automobile often adopts a fan clutch to control the cooling air quantity of the cooling fan. Regarding the fan clutch, there are mainly four types of current technologies, which are as follows:
(1) Silicone oil fan clutch. The bimetallic temperature sensor senses the air temperature behind the radiator, and automatically controls the opening and closing of an oil inlet valve of the silicone oil fan clutch to realize separation and engagement; however, because the clutch is driven by silicone oil, when the clutch is completely engaged, rotational speed slip is generated, in addition, because the bimetallic temperature sensor senses the air temperature behind the radiator, the oil inlet valve of the fan clutch is automatically controlled to be opened and closed, rather than the actual water temperature, the rotational speed of the fan cannot be accurately controlled;
(2) A pneumatic fan clutch. Reading water temperature data of a radiator, and controlling a pneumatic fan clutch to generate aerodynamic force by utilizing an electric signal so as to overcome spring force and realize separation and engagement; the device has the advantages of complex structure, heavy weight and high cost, and meanwhile, the device is in rigid transmission, has large rotating speed impact and can not be directly connected with a main shaft of an engine, and needs third shaft transmission;
(3) An electromagnetic fan clutch. Reading water temperature data of a radiator, and controlling an electromagnetic fan clutch to generate electromagnetic force to overcome spring force by utilizing an electric signal so as to realize separation and engagement; but the device has complex structure, heavy weight and high cost, and meanwhile, the device has rigid transmission and larger impact; but also can not be directly connected with the main shaft of the engine, and needs third shaft transmission;
(4) An electrically controlled silicone oil fan clutch. Reading water temperature data of a radiator, and controlling an oil inlet valve of an electrically controlled silicone oil fan clutch to open and close by utilizing an electric signal so as to realize separation and engagement; however, due to the viscosity of silicone oil, when the clutch is completely separated, the rotational speed has slip, namely, when the engine is running, the zero rotational speed of the fan cannot be achieved, and when the vehicle runs in a cold region, the water temperature is lower, so that the economy of the vehicle and the reliability of the engine are damaged.
The utility model discloses an electromagnetic clutch structure of an engine cooling fan, which comprises a fan bracket, a fan driving belt pulley and an electromagnetic clutch assembly, wherein the electromagnetic clutch assembly comprises an electromagnetic clutch shell, a coil, a temperature sensor, a fan connecting disc and a radiating disc assembly, the fan bracket is arranged at the front end of the engine, the fan driving belt pulley is arranged on the fan bracket through a bolt, the crank belt pulley is driven by a V-ribbed belt, and the electromagnetic clutch assembly is fixed with the fan bracket through the fan driving belt pulley. Although this utility model meets the operating requirements of the engine, it still has the following drawbacks: the electromagnetic clutch is an electromagnetic clutch, and the structure of the electromagnetic clutch is completely different from that of the electrically-controlled silicone oil clutch, so that the structure of the electromagnetic clutch is two different types of fan clutches, and the problem that the electrically-controlled silicone oil fan clutch cannot be completely separated cannot be solved.
Disclosure of Invention
The utility model aims to overcome the defects and problems of poor economy and low reliability in the prior art and provides a silicone oil fan clutch control system with good economy, high reliability and high control accuracy and a control method thereof.
In order to achieve the above object, the technical solution of the present utility model is: the silicone oil fan clutch control system comprises an engine, a fan belt pulley and an electric control silicone oil clutch, wherein one end of the fan belt pulley is mechanically connected with the engine, the other end of the fan belt pulley is mechanically connected with the electric control silicone oil clutch, and the electric control silicone oil clutch is connected with a fan;
the silicone oil fan clutch control system also comprises a mechanical clutch, a pneumatic device, an electromagnetic valve and an electronic control unit, wherein the electronic control silicone oil clutch is mechanically connected with the fan belt pulley through the mechanical clutch, the mechanical clutch is mechanically connected with the pneumatic device, the pneumatic device is connected with the electromagnetic valve gas circuit, the electromagnetic valve is electrically connected with the electronic control unit, and the electronic control unit is electrically connected with the electronic control silicone oil clutch;
the mechanical clutch is used for switching on or switching off power transmission between the engine and the electrically controlled silicone oil clutch;
the electronic control unit is used for controlling the separation and engagement of the mechanical clutch through the electromagnetic valve and the pneumatic device and controlling the rotating speed of the fan through the electrically controlled silicone oil clutch.
The silicone oil fan clutch control system further comprises a control switch, and the electronic control unit is electrically connected with the electromagnetic valve after passing through the control switch.
The silicone oil fan clutch control system also comprises an anti-shake processing unit, and the electronic control unit is electrically connected with the electromagnetic valve after sequentially passing through the control switch and the anti-shake processing unit;
the anti-shake processing unit is used for delaying the electronic control unit to output a control command to the electromagnetic valve.
The mechanical clutch comprises a spline housing, a first spline shaft and a second spline shaft which are coaxial, one end of the first spline shaft is mechanically connected with the fan belt pulley, the fan belt pulley is mechanically connected with the front end of the engine through the shaft, the other end of the first spline shaft is mechanically connected with one end of the spline housing, the other end of the spline housing is mechanically connected with one end of the second spline shaft, the other end of the second spline shaft is mechanically connected with the electrically controlled silicone oil clutch, a first thrust plate is arranged at a position, located between the fan belt pulley and the spline housing, of the first spline shaft, a second thrust plate is arranged at a position, located between the spline housing and the electrically controlled silicone oil clutch, of the second spline shaft, a reset spring is arranged between the second thrust plate and the spline housing, the reset spring is sleeved on the second spline shaft, one end of the reset spring is in contact with the spline housing, the other end of the reset spring is in contact with the second thrust plate, a fork shifting fork is arranged in the fork shifting fork.
The silicone oil fan clutch control system further comprises a fan support, the fan support is arranged at the front end of the engine, the fan belt pulley and the mechanical clutch are both located in the fan support, and the second spline shaft penetrates through the fan support and is mechanically connected with the electrically controlled silicone oil clutch.
One end of the shifting fork is arranged in the shifting fork groove, the part, far away from the shifting fork groove, of the shifting fork is mechanically connected with the fan bracket, the other end of the shifting fork is positioned outside the fan bracket, and the end of the shifting fork is mechanically connected with the pneumatic device.
The first thrust plate is arranged on the first spline shaft through a bearing sleeve, and the second thrust plate is arranged on the second spline shaft through a bearing sleeve.
A control method of a silicone oil fan clutch control system, the control method comprising the steps of:
when the water temperature of the radiator is higher than the set temperature, the electronic control unit controls the electromagnetic valve to be closed, at the moment, the pneumatic device does not work, the mechanical clutch is engaged, the power transmission between the engine and the electrically controlled silicone oil clutch is connected, the engine drives the fan to operate, and the rotating speed of the fan is controlled by the electrically controlled silicone oil clutch;
when the water temperature of the radiator is lower than the set temperature or the engine is in a starting stage, the electronic control unit controls the electromagnetic valve to be opened, at the moment, the pneumatic device works, the mechanical clutch is separated, the power transmission between the engine and the electrically controlled silicone oil clutch is cut off, the fan is not driven by external force, and the rotating speed of the fan is zero.
Compared with the prior art, the utility model has the beneficial effects that:
1. in the control system and the control method of the silicone oil fan clutch, one end of a fan belt pulley is mechanically connected with an engine, the other end of the fan belt pulley is mechanically connected with an electric control silicone oil clutch through a mechanical clutch, the mechanical clutch is mechanically connected with a pneumatic device, the pneumatic device is connected with an electromagnetic valve gas circuit, and the electromagnetic valve is electrically connected with an electronic control unit; when the fan is not required to run, the electronic control unit controls the mechanical clutch to be separated through the electromagnetic valve and the pneumatic device, so that power transmission between the engine and the electrically controlled silicone oil clutch is cut off, the problems that the working temperature of the engine is too low, the viscosity of engine oil is high and friction work is increased are solved, the economical efficiency of a vehicle is improved, the problem that abrasion between friction pairs of the engine is high is solved, the reliability of the engine is improved, and the separation of the mechanical clutch is controlled through the electronic control unit, the electromagnetic valve and the pneumatic device, so that the control is accurate. Therefore, the utility model not only improves the economy of the vehicle and the reliability of the engine, but also improves the control accuracy.
2. According to the silicone oil fan clutch control system and the control method thereof, the electronic control unit is electrically connected with the electromagnetic valve after passing through the control switch and the anti-shake processing unit in sequence, the control switch is additionally arranged, the control speed of the control system is improved, the anti-shake processing unit is additionally arranged, and the electromagnetic valve is prevented from being frequently operated. Therefore, the present utility model not only increases the control speed, but also prevents the solenoid valve from being frequently operated.
3. The utility model relates to a control system of a silicone oil fan clutch and a control method thereof, wherein a mechanical clutch comprises a spline housing, a first spline shaft and a second spline shaft which are coaxial, wherein a first thrust plate is arranged on the first spline shaft, a second thrust plate is arranged on the second spline shaft, a return spring is arranged between the second thrust plate and the spline housing, a shifting fork groove is arranged outside the spline housing, a shifting fork is arranged in the shifting fork groove, and a fan belt pulley and the mechanical clutch are both positioned in a fan bracket; the first thrust plate is arranged on the first spline shaft through the bearing sleeve, and the second thrust plate is arranged on the second spline shaft through the bearing sleeve, so that the working reliability of the mechanical clutch is improved. Therefore, the utility model has the advantages of simple structure, small occupied space, low cost and high reliability.
4. According to the silicone oil fan clutch control system and the control method thereof, one end of the shifting fork is arranged in the shifting fork groove, the part, which is far away from the shifting fork groove, of the shifting fork is connected with the fan support, the other end of the shifting fork is positioned outside the fan support, the shifting fork and the fan support form a lever through the design, when the water temperature of a radiator is lower than a set temperature or an engine is in a starting stage, the electromagnetic valve is controlled by the electronic control unit to be started, the pneumatic device works to push the shifting fork, the shifting fork drives the spline housing to shift towards the direction of the second spline shaft, at the moment, the power transmission between the first spline shaft and the second spline shaft is cut off, the fan is not driven by external force, and the rotating speed of the fan is zero. Therefore, the utility model has simple structure, low cost and simple and convenient operation.
Drawings
Fig. 1 is a schematic structural view of a silicone oil fan clutch control system according to the present utility model.
Fig. 2 is a flowchart of a control method of a silicone oil fan clutch control system of the present utility model.
Fig. 3 is a strategy diagram of a control method of a silicone oil fan clutch control system of the present utility model.
Fig. 4 is a schematic view of the assembly of the mechanical clutch of the present utility model.
Fig. 5 is a schematic diagram of the mechanical clutch of fig. 4.
Fig. 6 is a schematic diagram of friction torque of a four-cylinder engine at different temperatures.
Fig. 7 is a schematic diagram of the frictional work of a four-cylinder engine at different temperatures.
FIG. 8 is a schematic diagram of fan accessory power as a function of fan speed.
FIG. 9 is a schematic representation of engine oil viscosity as a function of oil temperature for a vehicle using the apparatus described herein.
In the figure: the engine 1, the fan pulley 2, the electrically controlled silicone oil clutch 3, the fan 4, the mechanical clutch 5, the spline housing 51, the spline shaft 52, the spline shaft 53, the thrust plate 54, the thrust plate 55, the return spring 56, the shifting fork groove 57, the shifting fork 58, the pneumatic device 6, the electromagnetic valve 7, the electronic control unit 8, the control switch 9, the anti-shake processing unit 10, the shaft 11 and the fan bracket 12.
In the figure, thin solid lines represent mechanical connections, thick solid lines represent gas path connections, and broken lines represent electrical connections.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 5, a silicone oil fan clutch control system comprises an engine 1, a fan belt pulley 2 and an electrically controlled silicone oil clutch 3, wherein one end of the fan belt pulley 2 is mechanically connected with the engine 1, the other end of the fan belt pulley 2 is mechanically connected with the electrically controlled silicone oil clutch 3, and the electrically controlled silicone oil clutch 3 is connected with a fan 4;
the silicone oil fan clutch control system further comprises a mechanical clutch 5, a pneumatic device 6, an electromagnetic valve 7 and an electronic control unit 8, wherein the electronic control silicone oil clutch 3 is mechanically connected with the fan belt pulley 2 through the mechanical clutch 5, the mechanical clutch 5 is mechanically connected with the pneumatic device 6, the pneumatic device 6 is in gas circuit connection with the electromagnetic valve 7, the electromagnetic valve 7 is electrically connected with the electronic control unit 8, and the electronic control unit 8 is electrically connected with the electronic control silicone oil clutch 3;
the mechanical clutch 5 is used for switching on or switching off the power transmission between the engine 1 and the electrically controlled silicone oil clutch 3;
the electronic control unit 8 is used for controlling the separation and engagement of the mechanical clutch 5 through the electromagnetic valve 7 and the pneumatic device 6 and controlling the rotating speed of the fan 4 through the electrically-controlled silicone oil clutch 3.
The silicone oil fan clutch control system further comprises a control switch 9, and the electronic control unit 8 is electrically connected with the electromagnetic valve 7 after passing through the control switch 9.
The silicone oil fan clutch control system further comprises an anti-shake processing unit 10, and the electronic control unit 8 is electrically connected with the electromagnetic valve 7 after sequentially passing through the control switch 9 and the anti-shake processing unit 10;
the anti-shake processing unit 10 is configured to delay the output of a control command from the electronic control unit 8 to the electromagnetic valve 7.
The mechanical clutch 5 comprises a spline housing 51, a first spline shaft 52 and a second spline shaft 53 which are coaxial, one end of the first spline shaft 52 is mechanically connected with the fan pulley 2, the fan pulley 2 is mechanically connected with the front end of the engine 1 through the shaft 11, the other end of the first spline shaft 52 is mechanically connected with one end of the spline housing 51, the other end of the spline housing 51 is mechanically connected with one end of the second spline shaft 53, the other end of the second spline shaft 53 is mechanically connected with the electrically controlled silicone oil clutch 3, a first thrust piece 54 is arranged on the first spline shaft 52 at a position between the fan pulley 2 and the spline housing 51, a second thrust piece 55 is arranged on the second spline shaft 53 at a position between the spline housing 51 and the electrically controlled silicone oil clutch 3, a return spring 56 is arranged between the second thrust piece 55 and the spline housing 51, the return spring 56 is sleeved on the second spline shaft 53, one end of the return spring 56 is in contact with the spline housing 51, the other end of the return spring 56 is in contact with the second thrust piece 55, a fork 57 is arranged outside the spline housing 51, and a fork 57 is arranged in a fork slot 57 is arranged in the fork slot 57.
The silicone oil fan clutch control system further comprises a fan bracket 12, the fan bracket 12 is arranged at the front end of the engine 1, the fan belt pulley 2 and the mechanical clutch 5 are both positioned in the fan bracket 12, and the second spline shaft 53 penetrates through the fan bracket 12 and is mechanically connected with the electrically controlled silicone oil clutch 3.
One end of the shifting fork 58 is arranged in the shifting fork groove 57, the shifting fork 58 is positioned at a position far away from the shifting fork groove 57 and is mechanically connected with the fan bracket 12, the other end of the shifting fork 58 is positioned outside the fan bracket 12, and the end is mechanically connected with the pneumatic device 6.
The first thrust plate 54 is sleeved on the first spline shaft 52 through a bearing, and the second thrust plate 55 is sleeved on the second spline shaft 53 through a bearing.
A control method of a silicone oil fan clutch control system, the control method comprising the steps of:
when the temperature of the water of the radiator is higher than the set temperature, the electronic control unit 8 controls the electromagnetic valve 7 to be closed, at the moment, the pneumatic device 6 does not work, the mechanical clutch 5 is engaged, the power transmission between the engine 1 and the electrically controlled silicone oil clutch 3 is connected, the engine 1 drives the fan 4 to operate, and the rotating speed of the fan 4 is controlled by the electrically controlled silicone oil clutch 3;
when the temperature of the radiator is lower than the set temperature or the engine 1 is in the starting stage, the electronic control unit 8 controls the electromagnetic valve 7 to be opened, at the moment, the pneumatic device 6 works, the mechanical clutch 5 is separated, the power transmission between the engine 1 and the electrically controlled silicone oil clutch 3 is cut off, the fan 4 is not driven by external force, and the rotating speed of the fan 4 is zero.
The principle of the utility model is explained as follows:
the design relates to the automobile industry, is suitable for all vehicles taking an engine as a fan power source, in particular to a system for improving the control performance of a silicone oil fan clutch, which is established on the basis of an electric control silicone oil fan clutch and is used for solving the problem that the electric control silicone oil fan clutch cannot be completely separated, and the principle is as follows:
a mechanical clutch is additionally arranged between the fan belt pulley and the fan clutch, and the mechanical clutch is controlled by an electronic control unit through an electromagnetic valve and a pneumatic device or other devices capable of enabling a shifting fork of the mechanical clutch to move back and forth; when the fan rotating speed is set to be 0 revolutions per minute, the system completely separates the mechanical clutch; when the set fan speed is greater than 0rpm, the system operates the mechanical clutch to engage; the rotation speed of the fan is still regulated by the electrically controlled silicone oil clutch.
The system can completely solve the problem that the electrically controlled silicone oil clutch cannot be completely separated. When the vehicle runs in a cold area, the environment temperature is too low, and the excessive heat dissipation efficiency is not needed at all to reduce the temperature of the cooling liquid, so that the excessive heat dissipation efficiency can not enable the temperature of the cooling liquid to reach the ideal working temperature (88 ℃) of the engine; the engine working temperature is too low, so that the viscosity of engine oil is too high, friction work is increased, and the economical efficiency of a vehicle is deteriorated; meanwhile, the engine oil with excessive viscosity is not easy to form an effective oil film, so that the abrasion between friction pairs of the engine is increased, and the reliability of the engine is reduced. Therefore, after the system is used, the economy and the reliability of the vehicle in the cold region environment can be effectively improved.
The economic improvement is achieved by the following two aspects:
(1) The temperature of the discharged water is improved, and the friction work of the engine is reduced. Because the electrically controlled silicone oil clutch cannot be completely separated, in an environment with low atmospheric temperature, the temperature of the cooling liquid is low due to the operation of the fan (the temperature of the cooling liquid is only balanced to about 65 ℃ when a certain truck is at the ambient temperature of minus 35 ℃), as shown in fig. 6 and 7, the friction work of a certain four-cylinder diesel engine is gradually reduced along with the rise of the temperature of the cooling liquid, and the reduction amplitude of the friction work of the engine is about 2% of the full load power at each rotating speed.
(2) The rotation speed of the fan is reduced, and the work of the fan accessories is reduced. In the unnecessary situation, the fan clutch is completely separated by using the device, so that the rotating speed of the fan is reduced to 0rpm, and the work of accessories of the fan is reduced; as shown in FIG. 8, according to the test result of the cold region of a vehicle, when the set rotation speed of the fan is 0, the electric silicone oil fan clutch cannot be completely separated, and the actual rotation speed of the fan is about 400 rpm.
In addition, the reliability level of the engine is correspondingly improved after the vehicle uses the device described by the design. The trend of the viscosity of the engine lubricating oil along with the change trend of the oil temperature is shown in fig. 9, when the temperature of the engine is lower, the viscosity of engine oil is correspondingly higher, and the effective oil film is relatively difficult to form for the friction surface between friction pairs in the engine, so that the lubrication effect is influenced, the service life of the engine is shortened, and the reliability of a vehicle is influenced.
The spline housing is sleeved on the spline of the first spline shaft and the second spline shaft and is used for transmission, a shifting fork groove is formed in the spline housing, the shifting fork can control the spline housing to slide, and when the shifting fork slides towards the second spline shaft, the power between the first spline shaft and the second spline shaft is cut off, and the transmission is not performed; when the reset spring pushes the reset spring back to the direction of the first spline shaft, the spline sleeve is communicated with the spline of the first spline shaft, and the first spline shaft and the second spline shaft are communicated in power, so that transmission is realized. The first spline shaft is hard-connected with the fan belt pulley and can be a shaft welded on the fan belt pulley, but has the requirement of verticality. The second spline shaft is hard-linked with the fan clutch and can be welded, and the second spline shaft can be fixed on an engine by using a bracket, but has the requirement of coaxiality with the first spline shaft. The first thrust plate and the second thrust plate respectively need to rotate relative to the first spline shaft and the second spline shaft. The reset spring is used for resetting the spline housing and cutting off transmission. The shifting fork is a lever, and the supporting point is arranged on the fan bracket, the engine or other parts of the whole automobile, so that the purpose is to shift the spline housing.
Description of working process:
when the water temperature is higher than the set temperature, the fan is required to run at a certain rotating speed, at the moment, the electronic control unit controls the electromagnetic valve to be closed, the pneumatic device air circuit to be closed, the shifting fork does not act, the spline housing is connected with the power between the first spline shaft and the second spline shaft, and the rotating speed of the fan is controlled by controlling the duty ratio of the fan clutch as with other engines;
when the water temperature is lower than the set temperature or the engine is in a starting stage, the fan is not required to operate, at the moment, the electronic control unit controls the electromagnetic valve to be opened, the pneumatic device is connected with the air channel (compressed air is arranged in the air channel and can push the shifting fork to act), the shifting fork is pushed by the air channel, the spline housing is shifted to the direction of the second spline shaft, the power transmission between the first spline shaft and the second spline shaft is cut off, at the moment, the fan is not driven by external force, and the rotating speed is zero.
The electrically controlled silicone oil clutch is also controlled by the electronic control unit, and the electrically controlled silicone oil clutch is relatively long in disengagement time and cannot be completely disengaged, and generally when the fan rotating speed is lower than 500RPM, the electrically controlled silicone oil clutch is considered to be completely disengaged, but the fan rotating speed is always reduced to be less than 0, so that adverse effects are brought to a cold region or when an engine is started. The mechanical clutch is used to cut off power from the physical power transmission when a fan speed of 0 is required, or when a fan speed < 500RPM is required.
The control SWITCH is a SWITCH, the middle is a judging condition, when the fan rotating speed is more than 0, the electromagnetic valve is closed, and when the fan rotating speed=0, the electromagnetic valve is opened.
The working principle of the anti-shake processing unit is as follows: when the electronic control unit issues a command for operating (opening or closing) the solenoid valve, the command is required to last for a certain period of time, and the anti-shake processing unit outputs the command for the purpose of preventing frequent operations of the solenoid valve, such as: at present, the electromagnetic valve is closed, and after 1s, a command is sent to open the electromagnetic valve, and the electromagnetic valve is required to be closed again at the 2 nd step, so that the method is unreasonable.
Example 1:
referring to fig. 1 and 3, a silicone oil fan clutch control system comprises an engine 1, a fan belt pulley 2, an electric control silicone oil clutch 3, a mechanical clutch 5, a pneumatic device 6, an electromagnetic valve 7, an electronic control unit 8, a control switch 9 and an anti-shake processing unit 10, wherein one end of the fan belt pulley 2 is mechanically connected with the engine 1, the other end of the fan belt pulley 2 is mechanically connected with the electric control silicone oil clutch 3 through the mechanical clutch 5, the electric control silicone oil clutch 3 is connected with a fan 4, the mechanical clutch 5 is mechanically connected with the pneumatic device 6, the pneumatic device 6 is in gas circuit connection with the electromagnetic valve 7, the electromagnetic valve 7 is electrically connected with the electronic control unit 8, and the electronic control unit 8 is electrically connected with the electric control silicone oil clutch 3; the electronic control unit 8 is electrically connected with the electromagnetic valve 7 after passing through the control switch 9 and the anti-shake processing unit 10 in sequence; the mechanical clutch 5 is used for switching on or switching off the power transmission between the engine 1 and the electrically controlled silicone oil clutch 3; the electronic control unit 8 is used for controlling the separation and engagement of the mechanical clutch 5 through the electromagnetic valve 7 and the pneumatic device 6 and controlling the rotating speed of the fan 4 through the electrically-controlled silicone oil clutch 3; the anti-shake processing unit 10 is configured to delay the output of a control command from the electronic control unit 8 to the electromagnetic valve 7.
Referring to fig. 2, according to the above scheme, a control method of a silicone oil fan clutch control system includes the following steps:
when the temperature of the water of the radiator is higher than the set temperature, the electronic control unit 8 controls the electromagnetic valve 7 to be closed, at the moment, the pneumatic device 6 does not work, the mechanical clutch 5 is engaged, the power transmission between the engine 1 and the electrically controlled silicone oil clutch 3 is connected, the engine 1 drives the fan 4 to operate, and the rotating speed of the fan 4 is controlled by the electrically controlled silicone oil clutch 3;
when the temperature of the radiator is lower than the set temperature or the engine 1 is in the starting stage, the electronic control unit 8 controls the electromagnetic valve 7 to be opened, at the moment, the pneumatic device 6 works, the mechanical clutch 5 is separated, the power transmission between the engine 1 and the electrically controlled silicone oil clutch 3 is cut off, the fan 4 is not driven by external force, and the rotating speed of the fan 4 is zero.
Example 2:
the basic content is the same as in example 1, except that:
referring to fig. 4 and 5, the mechanical clutch 5 includes a spline housing 51, a first spline shaft 52 and a second spline shaft 53 which are coaxial, one end of the first spline shaft 52 is mechanically connected with the fan pulley 2, the fan pulley 2 is mechanically connected with the front end of the engine 1 through the shaft 11, the other end of the first spline shaft 52 is mechanically connected with one end of the spline housing 51, the other end of the spline housing 51 is mechanically connected with one end of the second spline shaft 53, the other end of the second spline shaft 53 is mechanically connected with the electrically controlled silicone oil clutch 3, a first thrust piece 54 is arranged at a position, located between the fan pulley 2 and the spline housing 51, of the first spline shaft 52, a second thrust piece 55 is arranged at a position, located between the spline housing 51 and the electrically controlled silicone oil clutch 3, of the second spline shaft 53, a return spring 56 is arranged on the second spline shaft 53 in a sleeved mode, one end of the return spring 56 is in contact with the second spline housing 51, the other end of the return spring 56 is in contact with the second spline housing 55, a fork 57 is arranged outside of the fork 57, and a fork 57 is arranged outside the fork 57; the silicone oil fan clutch control system further comprises a fan bracket 12, the fan bracket 12 is arranged at the front end of the engine 1, the fan belt pulley 2 and the mechanical clutch 5 are both positioned in the fan bracket 12, and the second spline shaft 53 penetrates through the fan bracket 12 and is mechanically connected with the electrically controlled silicone oil clutch 3; one end of the shifting fork 58 is arranged in the shifting fork groove 57, the shifting fork 58 is positioned at a position far away from the shifting fork groove 57 and is mechanically connected with the fan bracket 12, the other end of the shifting fork 58 is positioned outside the fan bracket 12, and the end is mechanically connected with the pneumatic device 6; the first thrust plate 54 is sleeved on the first spline shaft 52 through a bearing, and the second thrust plate 55 is sleeved on the second spline shaft 53 through a bearing.
When the water temperature of the radiator is higher than the set temperature, the spline housing 51 is connected with power transmission between the first spline shaft 52 and the second spline shaft 53, at the moment, the engine 1 drives the fan 4 to run, and the rotating speed of the fan 4 is controlled by the electrically controlled silicone oil clutch 3;
when the temperature of the radiator is lower than the set temperature or the engine 1 is in the starting stage, the pneumatic device 6 pushes the shifting fork 58, the shifting fork 58 shifts the spline housing 51 to the direction of the second spline shaft 53, at this time, the power transmission between the first spline shaft 52 and the second spline shaft 53 is cut off, the fan 4 is not driven by external force, and the rotating speed of the fan 4 is zero.
Claims (5)
1. The utility model provides a silicone oil fan clutch control system, includes engine (1), fan pulley (2), automatically controlled silicone oil clutch (3), the one end and the engine (1) machinery of fan pulley (2) are connected, and the other end and the automatically controlled silicone oil clutch (3) machinery of fan pulley (2) are connected, are connected with fan (4) on the automatically controlled silicone oil clutch (3), its characterized in that:
the silicone oil fan clutch control system further comprises a mechanical clutch (5), a pneumatic device (6), an electromagnetic valve (7) and an electronic control unit (8), wherein the electronic control silicone oil clutch (3) is mechanically connected with the fan belt pulley (2) through the mechanical clutch (5), the mechanical clutch (5) is mechanically connected with the pneumatic device (6), the pneumatic device (6) is in gas circuit connection with the electromagnetic valve (7), the electromagnetic valve (7) is electrically connected with the electronic control unit (8), and the electronic control unit (8) is electrically connected with the electronic control silicone oil clutch (3);
the mechanical clutch (5) is used for switching on or switching off the power transmission between the engine (1) and the electrically controlled silicone oil clutch (3);
the mechanical clutch (5) comprises a spline sleeve (51) and a coaxial first spline shaft (52) and a second spline shaft (53), one end of the first spline shaft (52) is mechanically connected with a fan belt pulley (2), the fan belt pulley (2) is mechanically connected with the front end of the engine (1) through a shaft (11), the other end of the first spline shaft (52) is mechanically connected with one end of the spline sleeve (51), the other end of the spline sleeve (51) is mechanically connected with one end of the second spline shaft (53), the other end of the second spline shaft (53) is mechanically connected with an electric control silicone oil clutch (3), a first thrust plate (54) is arranged at a position between the fan belt pulley (2) and the spline sleeve (51) on the first spline shaft (52), a second thrust plate (55) is arranged at a position between the spline sleeve (51) and the electric control silicone oil clutch (3), a reset spring (56) is arranged between the second thrust plate (55) and the spline sleeve (51), a reset spring (56) is arranged at one end of the second spline sleeve (56) which is contacted with the spline sleeve (51), a reset spring (56) is arranged at the other end of the second spline sleeve (56) which is contacted with the spline sleeve (51), a shifting fork (58) is arranged in the shifting fork groove (57); the silicone oil fan clutch control system further comprises a fan bracket (12), the fan bracket (12) is arranged at the front end of the engine (1), the fan belt pulley (2) and the mechanical clutch (5) are both positioned in the fan bracket (12), and the second spline shaft (53) penetrates through the fan bracket (12) and is mechanically connected with the electrically controlled silicone oil clutch (3); the first thrust plate (54) is sleeved on the first spline shaft (52) through a bearing, and the second thrust plate (55) is sleeved on the second spline shaft (53) through a bearing;
the electronic control unit (8) is used for controlling the separation and engagement of the mechanical clutch (5) through the electromagnetic valve (7) and the pneumatic device (6), and controlling the rotating speed of the fan (4) through the electrically-controlled silicone oil clutch (3).
2. A silicone oil fan clutch control system as set forth in claim 1 wherein: the silicone oil fan clutch control system further comprises a control switch (9), and the electronic control unit (8) is electrically connected with the electromagnetic valve (7) after passing through the control switch (9).
3. A silicone oil fan clutch control system as set forth in claim 2 wherein:
the silicone oil fan clutch control system further comprises an anti-shake processing unit (10), and the electronic control unit (8) is electrically connected with the electromagnetic valve (7) after passing through the control switch (9) and the anti-shake processing unit (10) in sequence;
the anti-shake processing unit (10) is used for delaying the electronic control unit (8) to output a control command to the electromagnetic valve (7).
4. A silicone oil fan clutch control system as set forth in claim 1 wherein: one end of the shifting fork (58) is arranged in the shifting fork groove (57), the part, far away from the shifting fork groove (57), of the shifting fork (58) is mechanically connected with the fan bracket (12), the other end of the shifting fork (58) is positioned outside the fan bracket (12), and the end of the shifting fork is mechanically connected with the pneumatic device (6).
5. A control method of a silicone oil fan clutch control system as set forth in claim 1, characterized in that: the control method comprises the following steps:
when the temperature of the water of the radiator is higher than the set temperature, the electronic control unit (8) controls the electromagnetic valve (7) to be closed, at the moment, the pneumatic device (6) does not work, the mechanical clutch (5) is engaged, the power transmission between the engine (1) and the electrically controlled silicone oil clutch (3) is connected, the engine (1) drives the fan (4) to operate, and the rotating speed of the fan (4) is controlled by the electrically controlled silicone oil clutch (3);
when the temperature of the radiator is lower than the set temperature or the engine (1) is in a starting stage, the electronic control unit (8) controls the electromagnetic valve (7) to be opened, at the moment, the pneumatic device (6) works, the mechanical clutch (5) is separated, the power transmission between the engine (1) and the electrically-controlled silicone oil clutch (3) is cut off, the fan (4) is not driven by external force, and the rotating speed of the fan (4) is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711278167.4A CN108071476B (en) | 2017-12-06 | 2017-12-06 | Silicone oil fan clutch control system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711278167.4A CN108071476B (en) | 2017-12-06 | 2017-12-06 | Silicone oil fan clutch control system and control method thereof |
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| Publication Number | Publication Date |
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| CN108071476A CN108071476A (en) | 2018-05-25 |
| CN108071476B true CN108071476B (en) | 2023-06-06 |
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| CN201711278167.4A Active CN108071476B (en) | 2017-12-06 | 2017-12-06 | Silicone oil fan clutch control system and control method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113530658B (en) * | 2021-07-09 | 2022-11-01 | 东风马勒热***有限公司 | Wireless harness electric control silicone oil clutch |
| CN114810317B (en) * | 2022-04-24 | 2023-05-12 | 一汽解放汽车有限公司 | Control method and control system for silicone oil fan clutch |
| CN114810318B (en) * | 2022-05-05 | 2023-07-28 | 中国第一汽车股份有限公司 | Electromagnetic type electric control silicone oil clutch mechanical fan system and control method thereof |
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| DE2931305A1 (en) * | 1979-08-01 | 1981-02-19 | Maschf Augsburg Nuernberg Ag | Radiator fan for large IC engine - has thermostatically controlled mechanical two speed drive for efficient temp. regulation |
| DE3148014A1 (en) * | 1981-12-04 | 1983-05-11 | Daimler-Benz Ag, 7000 Stuttgart | Clutch unit |
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| DE102012216337A1 (en) * | 2011-09-14 | 2013-03-14 | Behr Gmbh & Co. Kg | Fluid friction coupling for fan wheel of internal combustion engine of e.g. pickup truck, has electric drive unit whose stator is attached to actuator assembly, and rotor is rotatably arranged on secondary module |
| CN205404124U (en) * | 2016-03-21 | 2016-07-27 | 北京福田康明斯发动机有限公司 | Silicone oil fan 's mounting structure |
| CN206513818U (en) * | 2017-03-07 | 2017-09-22 | 李学永 | A kind of axle power separating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE2931305A1 (en) * | 1979-08-01 | 1981-02-19 | Maschf Augsburg Nuernberg Ag | Radiator fan for large IC engine - has thermostatically controlled mechanical two speed drive for efficient temp. regulation |
| DE3148014A1 (en) * | 1981-12-04 | 1983-05-11 | Daimler-Benz Ag, 7000 Stuttgart | Clutch unit |
| JPH0526041A (en) * | 1991-07-16 | 1993-02-02 | Mazda Motor Corp | Cooling fan rotation control device for engine |
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| CN108071476A (en) | 2018-05-25 |
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