319 results about "Fan clutch" patented technology

The invention belongs to the technical field of automotive cooling systems, and particularly relates to a three-speed electromagnetic fan clutch. The three-speed electromagnetic fan clutch is characterized in that a magnet fixing disc is arranged in a fan fixing disc cavity, the magnet fixing disc is connected with a main shaft through a bearing, and the magnet fixing disc is fixedly connected with a small attraction disc through a small elastic sheet. Therefore, the three-speed electromagnetic fan clutch has the advantages of simple structure, large attraction torque, small recoil force, highreliability and long service life.

The invention discloses an electromagnetic fan clutch which comprises a clutch rotor, an internal clutch plate, an external clutch plate, a built-in coil, an external coil, a fan pedestal and a driving part, wherein the internal clutch plate and the external clutch plate are arranged opposite to the clutch rotor, the built-in coil and the external coil are positioned in the clutch rotor, the driving part and the fan pedestal are in driving connection, and the fan pedestal and the driving part are respectively connected with the internal clutch plate and the external clutch plate. Because the clutch rotor is provided with a copper ring for insulating an electromagnetic force, when the built-in coil and the external coil are respectively electrified, the internal clutch plate and the external clutch plate can be only sucked, and the torque of the clutch rotor is respectively correspondingly transmitted onto the driving part or the fan pedestal; when the torque is directly transmitted onto the fan pedestal, a fan is rotated at a high speed; and when the torque is transmitted onto the driving part, the fan is driven to rotate at a low speed under the action of the floating magnetic force between an iron part and a magnetic pole, so that the clutch has double-stage rotating speeds and corresponds to different radiating requirements, which is beneficial to saving energy and improving the fuel economical property.

The invention discloses a volume percentage variable magnetorheological fluid fan clutch which comprises a driving shaft, a driving cylinder, a left driven disc, a driven cylinder, a right driven disc and a driven shaft, wherein a driving disc is arranged in a chamber defined by the left driven disc, the driven cylinder and the right driven disc; a casing pipe is arranged on the left side of the driving disc; a shape memory alloy spring is arranged between the casing pipe and a connection disc; an inner magnetism isolating ring and an outer magnetism isolating ring are arranged on the right side of the driving disc; a magnet exciting coil is arranged in a coil groove; a filtering system is arranged on the right side of the driving disc; a working cavity is filled with a magnetorheological fluid; a fluid storage cavity is filled with a base fluid; an electric brush slip ring is arranged on the driving cylinder; the two poles of the electric brush slip ring are connected with the two ends of the magnet exciting coil respectively; and a shape memory alloy touch-piece switch is fixed to the driving cylinder. According to the volume percentage variable magnetorheological fluid fan clutch, output power can be adaptively adjusted, so that an automobile engine can work in an appropriate temperature range on all working conditions.

An electronic silicone oil fan clutch comprises a shell, a front cover, an oil storage cover, a driving shaft plugged in the shell and a driving board arranged on the driving shaft, and is characterized by also comprising a valve ring, a mandril, a resetting member and an electromagnetic valve; the valve ring is fixed on the tail of the mandril, axially penetrates through the hollow driving shaft and moves back and forth; the electromagnetic valve is connected with an engine electronic control unit by a wire bundle, generates magnetic field after powered up to suck the mandril to move forwards to realize control on openness degree of the oil outlet hole by the valve ring. Compared with the prior art, the invention has the advantages that various information is collected by the electronic control unit through preset parameters, according to the magnitude of current transmitted by the electronic control unit, the clutch generates a magnetic field corresponding to the magnitude, so that the mandril drives the valve block to move to realize connection and disconnection of silicone oil between an oil storage cavity and a meshing cavity, thus being capable of notifying in advance, and having the advantages of fast response, little influence by external, diverse control factors and high control preciseness.

The invention discloses an improved invention of a silicon oil fan clutch, which is essentially characterized in that a control component is composed of an executing unit, a temperature sensor and an ECU. The executing component and the temperature sensor are respectively connected with the ECU. In the invention, as a previous thermal sensitive spiral and bimetal spring temperature detector is modified into an electronic temperature sensor for detecting the temperature, and then the detected temperature is fed back to the ECU (an electronic controller unit) which rapidly sends out an order to cause the executing unit to be operated after distinguishing treatment, an oil inlet is opened and closed rapidly and precisely by a valve. Compared with the prior art, the invention has outstanding substantive features and obvious progress.

The invention discloses a clutch of a magneto rheological fluid (MRF) fan. The clutch disclosed by the invention comprises a power shaft, a fixed sleeve and an output disk, wherein a cavity filled with an MRF is arranged between the fixed sleeve and the output disk and is filled with a driving disk and a driven disk; the power shaft drives the driving disk and the driven disk drives the output disk; the fixed sleeve is internally provided with a positive coil and a negative coil which have different magnetic pole polarities, and a magnetism-isolation disk is arranged between the positive coiland the negative coil. The clutch disclosed by the invention has the advantages that the positive coil and the negative coil are arranged in the fixed sleeve, so that the output magnetic field is more stable, correspondingly the viscosity change of the MRF is also more stable, and the transmission is smoother; and the positive coil and the negative coil are separated by the magnetism-isolation disk, so that closed magnetic lines are formed, magnetic leakage is less, and the magnetic field distribution is more uniform.

The invention discloses an efficient flow-guide electric-control silicone oil fan clutch assembly. The clutch assembly comprises a driving shaft (2), a shell (6), a driving plate (7), a driven plate (10) and a front cover (12), wherein a fan (16) is arranged on the shell, a solenoid valve component (3) is arranged on the driving shaft, a magnetic conducting piece (11) is arranged on the driving plate and close to the driving shaft, an oil storage chamber (9) is arranged on the driving plate and between the driving plate and the driven plate, a circulating oil way (17) communicated with the oil storage chamber (9) is arranged in the front cover, and a working cavity (18) communicated with the oil storage chamber and the circulating oil way is arranged between the shell and the driving plate as well as the front cover and the driving plate. With the fan clutch assembly, the circulating and flowing speed of the silicone oil can be raised, the meshing response time and the separating response time between the driving part and the driven part of the fan clutch assembly are relatively shortened, and the rotating speed of the fan is controlled in real time, so that an engine runs at an optimal temperature all the time, and the purposes of energy saving, emission reduction and noise reduction of an automobile are realized.

The present invention relates to a silicon oil fan clutch which comprises a casing and a front cover. The front cover is sealed and connected with the casing to form an internal space. The internal space comprises an oil storage cavity and a meshing cavity. A valve plate which controls silicon oil circulation between the oil storage cavity and the meshing cavity is arranged between the oil storage cavity and the meshing cavity. The silicon oil fan clutch is characterized in that the clutch also comprise an electromagnet which can absorb the valve plate to close after being electrified and a wiring harness which is connected with an electronic control unit; the electromagnet consists of an iron core and a coil which is arranged on the iron core; the valve plate is elastic under the state without stress; due to self elasticity, the valve plate opens an oil storage hole leading the oil storage cavity to the meshing cavity. Compared with the prior art, the silicon oil fan clutch also has the advantages that the silicon oil fan clutch is free of a temperature sensing ring at the traditional silicon oil fan clutch and adopts the electronic control unit, thereby having the advantages of high precision, fast response and large temperature control range.

The invention discloses an integral coupled fan clutch bearing, a main body structure of which is also applicable to a coupled bearing of an automobile water pump. The bearing comprises double-row rollers and single-row steel balls, and comprises an bearing outer ring, a mandrel, a steel ball retainer, a roller retainer and a seal ring, wherein a groove and a roller path are formed in the bearing outer ring for bearing rolling elements and guiding the rotation of the rolling elements, the rolling elements comprise steel balls and cylindrical rollers, the mandrel is axially inserted into the bearing outer ring, an inner groove is formed in the outer diameter of the mandrel and is used for bearing the steel balls and guiding rotation of the steel balls, an inner roller path is formed in the outer diameter of the mandrel and is used for bearing the cylindrical rollers, the steel ball retainer is arranged between the bearing outer ring and the mandrel, and is used for enabling the steel balls to be evenly distributed in the groove at intervals, the roller retainer adopts the structural design of a barrel-shaped structure and a spring collar, the spring collar is assembled on the bearing outer ring in a matching manner for preventing the cylindrical rollers from jumping out along the axial direction, and the seal ring is pressed into a seal groove in the end part of the bearing outer ring and keeps the stationary state with the bearing outer ring.

A control system for a fan of a cooling system of an internal combustion engine of a motor vehicle having a viscous coupling (fan clutch) driving the fan and a control unit (PID governor) to which the setpoint temperature and the measured actual temperature of the cooling system (coolant temperature) are fed. The control unit (PID governor) is connected downstream to a limiter, which holds the ratio of output speed to input speed below a specifiable limit (x % of input speed). An overheat protection logic disables the limiter when the actual coolant temperature exceeds a specifiable critical temperature that is higher than the setpoint temperature of the control unit (PID governor).

The invention discloses a four-speed electromagnetic fan clutch. A driving disc is connected to one side of a main shaft; an electromagnetic iron core is embedded into the driving disc; a fist coil and a second coil are arranged in the electromagnetic iron core; a fan fixing disk is arranged on the other side of the main shaft; a first magnetic fixing disk in which a first permanent magnet is embedded is arranged between the fan fixing disk and the driving disc; the first magnet fixing disk and the fan fixing disk are respectively connected with a first sucking disk and a second sucking disk through elastic sheets; a third sucking disk is also arranged on the four-speed electromagnetic fan clutch; the centers of the first sucking disk, the second sucking disk and the third sucking disk are superposed; a second magnet fixing disk in which a second permanent magnet is embedded and a drive disc are sequentially arranged between the fan fixing disk and the first magnet fixing disk; the drive disc is fixedly connected onto the fan fixing disk; iron parts are arranged at the positions, which correspond to the first permanent magnet and the second permanent magnet, of the drive disc; the first magnet fixing disk and the second magnet fixing disk are sleeved on the main shaft through a composite bearing and are respectively and fixedly connected with an outer ring and an intermediate ring of the composite bearing; the third sucking disk is connected with the intermediate ring of the composite bearing through an elastic sheet; and a third coil is also arranged in the electromagnetic iron core.

A fan clutch is provided to which a fan may be removably attached with the aid of a flange ring, the fan clutch having a housing that comprises a first front housing part and a second rear housing part to which the flange ring is attachable with the aid of connecting elements (8). The housing has circumferential attachment niches which are situated in an offset manner in the circumferential direction on both the front and the back of the housing and into which attachment tabs situated on the flange ring are insertable either from the from of the fan clutch or from the rear thereof.

A hand held tool to prevent a pulley from rotating around an axis of rotation. A handle portion is provided on the tool to be held by a user of the tool. An engaging portion is provided to grip a portion of the pulley and prevent the pulley from rotating around the axis when said handle portion is held by the user. A tool is used to remove a fan clutch on an automobile engine. The tool has a handle portion having a user gripping portion disposed at one end and a connecting portion at another end. An engaging portion is used to grip a rim of the pulley and prevent the pulley from rotating around its rotating axis. The engaging portion has a U-shaped body with a base connected to the connecting portion of the handle portion and two arms extending radially from an axis formed by the elongated rod of the handle portion. The arms are displaced from one another by an amount sufficient to receive a rim of the pulley and have a sufficient size to form a friction surface to inhibit rotation of the pulley around its rotating axis when the arms engage the rim of the pulley.

A control method of a magnet type fan clutch is provided to improve engine performance, fuel economy, engine life, and vehicle acceleration and to reduce fan noise, and optimize fan horsepower. The magnet type fan clutch has a magnet coupling combined with an electromagnetic clutch. The method includes turning the electromagnetic clutch ON and OFF on the basis of cooling fluid temperature, engine oil temperature, transmission oil temperature, vehicle speed, engine rotation rate, accelerator opening, compressor pressure of an air conditioner, an On or Off signal of the air condition, a fuel injection indication amount, a clutch activation lower limit temperature and its lower temperature, and an engine rotation rate set value to control the fan rotation.

The invention relates to an electromagnetic fan clutch, which is used for dissipating heat of an automobile engine and aims to be compact in structure and more stable in running. The electromagnetic fan clutch comprises a rotary spindle, electromagnet cores with embedded coils, a driven plate and a driving plate, wherein the electromagnet cores are sequentially sleeved from a support end to a free end along the axial direction of the spindle, the driven plate can rotate around the spindle, the driving plate can rotate along with the spindle, and a sucking plate capable of axially moving is disposed between the driving plate and the driven plate and is connected with the driving plate by an elastic sheet.

An electrothermal speed controller of a silicon oil fan comprises an electronic controller, an electric fan, an electric heater, an air duct, an air outlet, an inter-cooling air-intake temperature sensor and a coolant liquid temperature sensor. The electronic controller, the electric fan, the electric heater, the air duct and the air outlet are mounted sequentially, the air outlet corresponds to a bimetallic temperature sensor of a silicon oil fan clutch, and the electric fan and the electric heater are connected with the electronic controller. The electrothermal speed controller is characterized in that a rotation speed sensor is arranged on the electric fan, the electric heater is arranged in an air outlet direction of the electric fan, a temperature sensor is arranged on the electric heater, and the electric fan, the rotation speed sensor, the electric heater and each temperature sensor are connected with a driving power supply via the electronic controller. On a condition of keeping the structure of the existing silicon oil fan clutch completely, the electrothermal speed controller is added with parts such as the electric fan, the electric heater, the coolant liquid temperature sensor, the air-intake temperature sensor, the electronic controller, an air port cover and the like, thereby realizing control to rotation speed of the fan according to temperature of a motor and having functions of saving energy and reducing emission.