CN201475020U - Controller of automobile-engine cooling fans - Google Patents
Controller of automobile-engine cooling fans Download PDFInfo
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- CN201475020U CN201475020U CN2009202091847U CN200920209184U CN201475020U CN 201475020 U CN201475020 U CN 201475020U CN 2009202091847 U CN2009202091847 U CN 2009202091847U CN 200920209184 U CN200920209184 U CN 200920209184U CN 201475020 U CN201475020 U CN 201475020U
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Abstract
The utility model relates to a controller of automobile-engine cooling fans, which is characterized by being used for controlling two automobile-engine cooling fans; the controller of the automobile-engine cooling fans comprises a shell, a control circuit arranged in the shell and a power module providing power for all elements of the control circuit, wherein the control circuit comprises a master control module, a first fan control circuit bidirectionally and electrically connected with a motor of one automobile-engine cooling fan, a second fan control circuit bidirectionally and electrically connected with the motor of the other automobile-engine cooling fan; and the master control module is bidirectionally and electrically connected with an automobile electronic control system, and also bidirectionally and electrically connected with the first fan control circuit and the second fan control circuit respectively. By controlling and driving a pulse width modulation signal of the automobile-engine cooling fan, the controller realizes the control on the rotating speed of the cooling fan, and leads a condensing radiating fin in an engine compartment to quicken the radiating speed, thus realizing the temperature reduction on the automobile engine, and also being capable of having the effects of saving energy and reducing emission.
Description
Technical field
The utility model relates to a kind of automobile engine cooling fan controller.
Background technique
The engine cooling fan is mainly used in the cooling work in the car engine cabin, the mode of fan by directly drying to the water-cooled condensate film, take the heat on the condensate film out of engine cabin, improve the integral heat sink efficient of engine cabin, prevent overheated a series of mechanical failures that cause of engine and the dangerous hidden danger that may bring, guarantee traffic safety.
Traditional engine cooling fan is a 4-5 shelves resistance type speed change; variable-speed is range limited big; and monitoring/protection/information feedback function can't not provide current fan state information to the driver effectively in time under abnormal operating state, therefore may bring the hidden danger of traffic safety.And because therefore the qualification of shift scope can't realize intelligent accurate the adjusting to wind speed.
Pulse duration modulation (Pulse Width Modulation is called for short PWM) control mode has accurately wind speed regulating power.It is a kind of analog signal level to be carried out digitally coded method, and by the use of high-resolution counter, modulated being used for of the dutycycle of square wave encoded to the level of a physical simulation signal.As long as bandwidth is enough wide, any analogue value can use PWM to encode.Its advantage is that all be digital form from processor to the controlled system signal, need not to carry out digital-to-analog conversion.Allow signal remain digital form and influence of noise can be dropped to minimum; Simultaneously, by digital form control analog circut, can reduce the cost and the power consumption of system significantly.In addition, many microcontrollers (Micro Controller Unit is called for short MCU) and DSP digital signal processor (Digital SignalProcessor is called for short DSP) have comprised the PWM controller on chip, and this becomes numerically controlled realization and is more prone to.In a word, PWM technology both economy, conserve space, noiseproof feature is strong, can accomplish energy-saving and emission-reduction, requirements of green environmental protection better again.
Summary of the invention
The utility model is in order to overcome the problems referred to above that prior art exists, and a kind of automobile engine cooling fan controller that provides, this automobile engine cooling fan controller mainly is pulse duration modulation (PWM) signal by the controlling and driving automobile engine cooling fan, realization is to the control of cooling fan rotation speed, utilize the different rotating speed of cooling fan, blow to the condensation radiating fin in the engine cabin, accelerate heat dissipation rate, thereby realize cooling car engine.Can also play the effect of energy-saving and emission-reduction.
The technological scheme that the utility model is taked is: a kind of automobile engine cooling fan controller is characterized in: comprise two automobile engine cooling fans; Described automobile engine cooling fan controller comprises housing and is arranged on the power module that the interior control circuit and of housing provides each element work in the control circuit; Described control circuit comprises a main control module, two fan control circuitrys; Described main control module is electrically connected with the electronic control system of automobile is two-way, this main control module and respectively with described two two-way electrical connections of fan control circuitry; Described each fan control circuitry is electrically connected with the motor of an automobile engine cooling fan is two-way.
Above-mentioned a kind of automobile engine cooling fan controller wherein, also comprises a controller temperature control module, and described controller temperature control module is made of the temp .-sensitive diodes and the bleeder circuit that are arranged in the controller shell; The output terminal of this controller temperature control module is electrically connected with the input end of main control module.
Above-mentioned a kind of automobile engine cooling fan controller wherein, also comprises a fan power supply testing module, and described fan power supply testing module mainly is made of bleeder circuit; The output terminal of this module is electrically connected with the input end of main control module, and the input end of this module is electrically connected with the motor of fan.
Above-mentioned a kind of automobile engine cooling fan controller, wherein, the structure of described two fan control circuitrys is identical, respectively comprises a fan electromotor driver module and a current/voltage sampling module; The input end of described fan electromotor driver module is electrically connected with the output terminal of described main control module, and the output terminal of this fan electromotor driver module is electrically connected with the motor input end of separately an automobile engine cooling fan; The input end of described current/voltage sampling module is electrically connected with the motor output end of separately an automobile engine cooling fan, the input end of this current/voltage sampling module also is electrically connected with the output terminal of described fan electromotor driver module, and the output terminal of this current/voltage sampling module is electrically connected with the input end of described main control module.
Above-mentioned a kind of automobile engine cooling fan controller, wherein, described fan electromotor driver module comprises a gate drive circuit and a power tube switching circuit; The input end of described gate drive circuit is electrically connected with an output terminal of described main control module, and the output terminal of described gate drive circuit is electrically connected with the input end of described power tube switching circuit; The output terminal of described power tube switching circuit is electrically connected with the input end of separately an automobile engine cooling fan motor; Described current/voltage sampling module comprises a voltage sampling circuit, a current sampling circuit and a signal amplification circuit; The input end of described voltage sampling circuit is electrically connected with the output terminal of the motor of separately an automobile engine cooling fan, and the input end of this voltage sampling circuit also is electrically connected with the output terminal of power tube switching circuit in the described gate drive circuit; The output terminal of described voltage sampling circuit is electrically connected with the input end of main control module; The input end of described current sampling circuit is electrically connected with the output terminal of separately an automobile engine cooling fan motor, the output terminal of this current sampling circuit is electrically connected with the input end of signal amplification circuit, and the output terminal of this signal amplification circuit is electrically connected with the input end of main control module.
Above-mentioned a kind of automobile engine cooling fan controller, wherein, described main control module comprises a pulse-width signal capture unit, one first filter unit, a judgment processing unit, a storage unit, one second filter unit, one the one A/D conversion port, two groups of A/D conversion ports and two pulse-width signal output units; Described pulse-width signal capture unit is connected with the electronic control system of automobile is two-way, the output terminal of this pulse-width signal capture unit is electrically connected with an A/D conversion port, the output terminal of the one A/D conversion port is electrically connected with the input end of first filter unit, and the output terminal of described first filter unit is electrically connected with the input end of described judgment processing unit; Described storage unit and two-way connection of described judgment processing unit; The output terminal of each fan control circuitry in described two fan control circuitrys is electrically connected with the input end of described second filter unit by one group of A/D conversion port respectively, and the output terminal of described second filter unit is electrically connected with the input end of described judgment processing unit; The output terminal of described judgment processing unit connects the input end of two pulse-width signal output units respectively, and the output terminal of each the pulse-width signal output unit in described two pulse-width signal output units is electrically connected with the input end of a fan control circuitry respectively.
Above-mentioned a kind of automobile engine cooling fan controller wherein, also comprises the voltage/current detection module of a fan electromotor, and the voltage/current detection module of described fan electromotor mainly is made of a bleeder circuit; Described main control module also comprises one the 2nd A/D conversion port and one the 3rd filter unit; The input end of the voltage/current detection module of described fan electromotor is electrically connected with the motor of two automobile engine cooling fans respectively, the output terminal of the voltage/current detection module of this fan electromotor is electrically connected with the input end of described the 2nd A/D conversion port, the output terminal of described the 2nd A/D conversion port is electrically connected with the input end of described the 3rd filter unit, and the output terminal of described the 3rd filter unit is electrically connected with the input end of described judgment processing unit.
Above-mentioned a kind of automobile engine cooling fan controller wherein, also comprises a temperature control module, and described temperature control module mainly is made of the temp .-sensitive diodes and the bleeder circuit that are arranged in the controller shell; Described main control module also comprises one the 3rd A/D conversion port and one the 4th filter unit, the output terminal of described temperature control module is electrically connected with the input end of the 3rd A/D conversion port, the output terminal of described the 3rd A/D conversion port is electrically connected with the input end of described the 4th filter unit, and the output terminal of described the 4th filter unit is electrically connected with the input end of described judgment processing unit.
Above-mentioned a kind of automobile engine cooling fan controller, wherein: the structure of described two fan control circuitrys is identical, respectively comprises a fan electromotor driver module and a current/voltage sampling module; Wherein: described fan electromotor driver module comprises a gate drive circuit and a power tube switching circuit that is linked in sequence; The input end of described gate drive circuit is electrically connected with the output terminal of a pulse-width signal output unit of described main control module, and the output terminal of this gate drive circuit is electrically connected with the input end of described power tube switching circuit; The output terminal of described power tube switching circuit is electrically connected with the motor input end of separately an automobile engine cooling fan; Described current/voltage sampling module comprises a voltage sampling circuit, a current sampling circuit and a signal amplification circuit; The input end of described voltage sampling circuit is electrically connected with the output terminal of the motor of separately an automobile engine cooling fan and the output terminal of the power tube switching circuit in the gate drive circuit separately respectively, and the A/D conversion port in one group of A/D conversion port of the output terminal of this voltage sampling circuit and main control module is electrically connected; The input end of described current sampling circuit is electrically connected with the output terminal of the motor of separately an automobile engine cooling fan, and the output terminal of this current sampling circuit is electrically connected with the input end of signal amplification circuit; Another A/D conversion port in above-mentioned one group of A/D conversion port of the output terminal of described signal amplification circuit and main control module is electrically connected.
Because the utility model has adopted above technological scheme, the technique effect of its generation is significantly,
1, adopt the method for parallel control fan electromotor, in case transportation work style fan drives when going wrong, the fan that another road runs well also can stop not change.
2, adopt the PWM controlling method,, adjust the tachometer value size of cooling fan motor, the running state of cooling fan is controlled by the size that the dutycycle (Duty Cycle) that changes control circuit output pwm signal in the cooling fan controller is worth.When the temperature in car engine cabin is too high, electronic control system in the automobile (Electronic Control Unit is called for short ECU) detects its temperature value by temperature transducer (Sensor) in the car engine cabin, and according to detected temperature data, ECU sends rotary speed instruction to the automobile engine cooling fan controller; After the automobile engine cooling fan controller receives rotary speed instruction, call the running of its inner fan electromotor driver module control cooling fan, with the condensation radiating fin of wind in the car engine cabin, accelerate heat dissipation rate, thereby realize cooling engine.
3, the automobile engine cooling fan controller is by the sample circuit of self; can synchronously detect all kinds of abnormal conditions of cooling fan, and realize Electronic Protection timely, fail messages such as overcurrent, overload are fed back to vehicle-mounted ECU; at this moment, the alarm in the automobile can send early warning signal.
4, owing in the control circuit of controller, designed a temperature control module of building with temp .-sensitive diodes in order to detect the operating temperature of controller, can guarantee controller can be in certain temperature range proper functioning, avoid because the too high problem that causes that the components and parts in the automobile engine cooling fan controller damage of temperature.
Description of drawings
Concrete structure of the present utility model is further described by following embodiment and accompanying drawing thereof.
Fig. 1 is the utility model automobile engine cooling fan controller surface structure schematic representation.
Fig. 2 is the utility model automobile engine cooling fan controller one embodiment's a electrical block diagram.
Fig. 3 is the electrical block diagram of the specific embodiment of an embodiment of main control module in the utility model automobile engine cooling fan controller and the automobile engine cooling fan controller that utilizes this main control module.
Fig. 4 is the structural representation of the fan control circuitry in the utility model automobile engine cooling fan controller.
Fig. 5 is the handling process schematic representation of the main control module of the utility model automobile engine cooling fan controller.
Embodiment
See also Fig. 1, Fig. 2, wherein Fig. 1 is this utility car engine cooling fan controller surface structure schematic representation, and Fig. 2 is the electrical block diagram of this utility car engine cooling fan controller.A kind of automobile engine cooling fan controller of the utility model is used to control the work of the motor of the automobile engine cooling fan 100 that is used for car engine cooling and 200 two automobile engine cooling fans of another automobile engine cooling fan.Described automobile engine cooling fan controller comprises housing 1 and is arranged on the power module 3 that the interior control circuit 2 and of housing provides each element work in the control circuit.
Described control circuit 2 comprises a main control module 21, first fan control circuitry 22 that is connected with the motor of an automobile engine cooling fan 100, second fan control circuitry 23 that is connected with the motor of another automobile engine cooling fan 200.Electronic control system 300 two-way electrical connections of described main control module and automobile, this main control module and respectively with described first fan control circuitry 22 and second fan control circuitry, 23 two-way electrical connections.Described main control module can be made of a microprocessor (Micro Control Unit is called for short MCU).The output terminal of described first fan control circuitry 22 and second fan control circuitry 23 respectively with two-way electrical connection of motor of separately automobile engine cooling fan, wherein, described first fan control circuitry 22 is electrically connected with the motor of an automobile engine cooling fan 100 is two-way, and described second fan control circuitry 23 is electrically connected with the motor of another automobile engine cooling fan 200 is two-way.
According to the pulse-width signal of the electronic control system output of the automobile of catching and the data by two fan control circuitrys samplings, calculation process through main control module, the pulse-width signal that output two-way frequency is identical with the pulse-width signal of the electronic control system output of the automobile of seizure is used to drive first fan control circuitry and second fan control circuitry, and the effective voltage value that utilizes different dutycycle correspondences regulates the rotating speed of automobile engine cooling fan, reaches the purpose of the work of an automobile engine cooling fan motor of each fan control circuitry control.
See also Fig. 3, Fig. 3 is the electrical block diagram of the specific embodiment of the utility model main control module one embodiment and the automobile engine cooling fan controller that utilizes this main control module.In a kind of automobile engine cooling fan controller of the utility model, described main control module 21 comprises a pulse-width signal capture unit 211, one first filter unit 212-1, one second filter unit 212-2, a judgment processing unit 213, a storage unit 214, one the one A/D conversion port 215-1, first group of A/D conversion port 216-1, second group of A/D conversion port 216-2 and the first pulse-width signal output unit 217-1 and the second pulse-width signal output unit 217-2.Described pulse-width signal capture unit is connected with the electronic control system of automobile is two-way, the output terminal of this pulse-width signal capture unit is electrically connected with an A/D conversion port, the output terminal of the one A/D conversion port is electrically connected with the input end of first filter unit, described first filter unit is used to handle the pwm signal that captures, adopt the edge to judge, reach anti-Flutter average filter method filtered error signal, the output terminal of this first filter unit is electrically connected with the input end of described judgment processing unit; Described storage unit and two-way connection of described judgment processing unit; The output terminal of described first fan control circuitry and second fan control circuitry is electrically connected with the input end of second filter unit by first group of A/D conversion port and second group of A/D conversion port respectively, described second filter unit is used to handle the data of A/D sampling, adopt arithmetic mean filter method filter false data, the output terminal of this second filter unit is electrically connected with the input end of described judgment processing unit; Described judgment processing unit is according to the pulse-width signal of catching and by first group of A/D conversion port and second group of data that the A/D conversion port is sampled, processing computing through this judgment processing unit, arrive described first fan control circuitry and described second fan control circuitry by the first pulse-width signal output unit and second pulse-width signal output unit output control signal corresponding, according to the dutycycle size of pulse-width signal, control two automobile engine cooling fan rotating speed of motor and work respectively.
For the supply voltage of judging fan electromotor proper functioning whether, in the present embodiment, also comprise a fan power supply testing module 24, this fan power supply testing module 24 mainly is made of bleeder circuit.Described main control module 21 also comprises one the 2nd A/D conversion port 215-2 and one the 3rd filter unit 212-3, the input end of described fan power supply testing module is electrically connected with the motor of two automobile engine cooling fans respectively, the output terminal of this fan power supply testing module is electrically connected with the input end of described the 2nd A/D conversion port, the output terminal of described the 2nd A/D conversion port is electrically connected with the input end of described the 3rd filter unit, and the output terminal of described the 3rd filter unit is electrically connected with the input end of described judgment processing unit.The 2nd A/D conversion port 215-2 and one the 3rd filter unit 212-3, the output terminal of described fan power supply testing module is electrically connected with the input end of the 2nd A/D conversion port, the output terminal of described the 2nd A/D conversion port is electrically connected with the input end of described the 3rd filter unit, described the 3rd filter unit adopts the arithmetic mean filter method, and the output terminal of the 3rd filter unit is electrically connected with the input end of described judgment processing unit.By the judgement of judgment processing unit in the main control module, realize control to two fan driving motors to the voltage height of the motor of two automobile engine cooling fans.When the fan power supply testing module collects the voltage data of fan, after handling through A/D conversion and filtering etc.,, show that then fan electromotor is in normal work stage if the fan input terminal voltage is in the value of setting; When if fan electromotor is in non-normal working; such as open circuit conditions, this magnitude of voltage will obviously reduce, after this situation is known by the result of A/D conversion in the judgment processing unit in the main control module; start the protection strategy, send corresponding alarm signal to the electronic control system ECU of automobile.Simultaneously; collect the current data of fan in the fan power supply testing module; enter the A/D conversion port of main control module with the form that finally converts voltage to, after handling through A/D conversion and filtering etc., judge whether to exceed normal range of operation; if there is overcurrent condition to take place; according to fan electrical current protection strategy, fan is protected, will stop to send drive signal to fan; with protection controller internal circuit and fan, and send corresponding alarm signal to the electronic control system ECU of automobile.
In the present embodiment, also comprise a temperature control module 25, described temperature control module is made of the temp .-sensitive diodes and the bleeder circuit that are arranged in the controller shell; Described main control module also comprises one the 3rd A/D conversion port 215-3 and one the 4th filter unit 212-4, the output terminal of described temperature control module is electrically connected with the input end of the 3rd A/D conversion port, the output terminal of described the 3rd A/D conversion port is electrically connected with the input end of described the 4th filter unit, described the 4th filter unit adopts limit filtration method and anti-Flutter average filter method, and the output terminal of the 4th filter unit is electrically connected with the input end of described judgment processing unit.Utilize the temp .-sensitive diodes characteristic that internal resistance changes under different temperatures, variation of temperature is converted to the variation of voltage, and magnitude of voltage delivered in the main control module, after processing such as A/D conversion port and filtering, calculate the internal work temperature of current the utility model automobile engine cooling fan controller by main control module, according to the temperature protection strategy, circuit to the utility model automobile engine cooling fan controller is protected, for example, when fan governor internal work temperature for example reaches 120 degrees centigrade above threshold temperature, fan governor will not accepted the PWM wind speed control signal of the electronic control system (ECU) from automobile, by force two fans are adjusted to maximum (top) speed, with the inside temperature of the mode cooling engine chamber of forced-ventilated wind; When controller internal work temperature surpasses 135 degrees centigrade, fan governor will not accepted the PWM wind speed control signal of the electronic control system (ECU) from automobile, by force two fans cut out, in order to the inner components and parts of protection controller.
Each A/D conversion port described in the utility model is respectively applied for gathers general power voltage, temperature and the electric current of two fan electromotors and the value of voltage.
See also Fig. 4, Fig. 4 is the embodiment's of first fan control circuitry, second fan control circuitry in the utility model automobile engine cooling fan controller a structural representation.In a kind of automobile engine cooling fan controller of the utility model, described first fan control circuitry 22 is identical with second fan control circuitry, 23 structures, respectively comprises a fan electromotor driver module and a current/voltage sampling module.Be that example is elaborated now with first fan control circuitry 22:
Described first fan control circuitry 22 comprises a fan electromotor driver module 221 and a current/voltage sampling module 222, the input end of described fan electromotor driver module 221 is electrically connected with the output terminal of described main control module 21, and the output terminal of this fan electromotor driver module 221 is electrically connected with the motor input end of automobile engine cooling fan 100; The input end of described current/voltage sampling module 222 is electrically connected with the motor output end of a described automobile engine cooling fan 100, and the input end of this current/voltage sampling module also is electrically connected with the output terminal of described fan electromotor driver module 221; The output terminal of this current/voltage sampling module is electrically connected with the input end of described main control module 21.
Fan electromotor driver module 221 described in the utility model comprises a gate drive circuit 2211 and a power tube switching circuit 2212; The input end of described gate drive circuit 2211 is electrically connected with an output terminal of described main control module, the input end of the described gate drive circuit 2211 described in the present embodiment is electrically connected with the output terminal of the first pulse-width signal output unit 217-1 of described main control module, and the output terminal of this gate drive circuit 2211 is electrically connected with the input end of described power tube switching circuit 2212.The output terminal of described power tube switching circuit 2212 is electrically connected with the input end of the motor of automobile engine cooling fan 100.
Current/voltage sampling module 222 described in the utility model comprises a voltage sampling circuit 2221, a current sampling circuit 2222 and a signal amplification circuit 2223; The input end of described voltage sampling circuit 2221 is electrically connected with the output terminal of the motor of automobile engine cooling fan 100, and the input end of this voltage sampling circuit 2221 also is electrically connected with the output terminal of power tube switching circuit 2212 in the fan electromotor driver module 221; The output terminal of described voltage sampling circuit 2221 is electrically connected with the input end of main control module, is that the A/D conversion port 216-11 among first group of A/D conversion port 216-1 with main control module is electrically connected in the present embodiment; The input end of described current sampling circuit 2221 is electrically connected with the output terminal of the motor of automobile engine cooling fan 100, the output terminal of this current sampling circuit 2221 is electrically connected with the input end of signal amplification circuit 2223, the output terminal of this signal amplification circuit 2223 is electrically connected with the input end of main control module, is that another A/D conversion port 216-12 among first group of A/D conversion port 216-1 with main control module is electrically connected in the present embodiment.
In like manner, the input end of the gate drive circuit in described second fan control circuitry 23 is electrically connected with the output terminal of the second pulse-width signal output unit 217-2 of described main control module; The input end of the power tube switching circuit in the output terminal of the gate drive circuit in described second fan control circuitry and this second fan control circuitry is electrically connected; The output terminal of the power tube switching circuit in described second fan control circuitry is electrically connected the output terminal of this power tube switching circuit and is electrically connected with the input end of the voltage sampling circuit of this second fan control circuitry with the input end of the motor of another automobile engine cooling fan 200.The input end of the voltage sampling circuit in described second fan control circuitry 23 is electrically connected with the output terminal of the motor of another automobile engine cooling fan 200, and the A/D conversion port 216-21 among second group of A/D conversion port 216-2 of the output terminal of this voltage sampling circuit and main control module is electrically connected; The input end of the current sampling circuit in described second fan control circuitry is electrically connected with the output terminal of the motor of another automobile engine cooling fan 200, the output terminal of this current sampling circuit is electrically connected with the input end of signal amplification circuit, and another A/D conversion port 216-22 among second group of A/D conversion port 216-2 of the output terminal of this signal amplification circuit and main control module is electrically connected.
Power tube switching circuit described in the present embodiment mainly is made of Metal-oxide-semicondutor-field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor is called for short MOSFET).Average make-and-break time by control MOSFET power tube is controlled the effective voltage/electric current of fan, thereby reaches the purpose of control rotation speed of the fan.
Working principle of the present utility model is (working procedure with first control circuit is that example is elaborated): main control module (MCU) receives the pulsewidth modulation with different duty (PWM) digital signal from electronic control system (ECU) transmission of automobile, read the rotary speed information of in real time relevant car engine fan and the temperature information in the engine cabin according to self software algorithm, judge the working state of fan this moment and pulsewidth modulation (PWM) signal of receiving is handled.Then, main control module (MCU) is handling the driver module that PWM digital signal later sends to first control circuit.After the driver module of first control circuit receives the pwm signal that main control module (MCU) spreads out of, gate drive circuit by first control circuit drives high power transistor (GTR) (MOSFET), obtain a suitable PWM drive signal, drive the rotation of the motor of automobile engine cooling fan 100.Simultaneously, the magnitude of voltage of the voltage sampling circuit sampling high power transistor (GTR) (MOSFET) in the sampling module of first control circuit is in order to the working state of detection high power transistor (GTR) MOSFET and the running of fan; In addition, the magnitude of voltage of the voltage sampling circuit sampling cooling fan 100 of first control circuit, the current value of current sampling circuit sampling cooling fan 100, and through behind the signal amplification circuit after the signal of voltage sampling circuit output is sent into first group of A/D converter of main control module (MCU), main control module (MCU) is according to receiving sampled signal, judge the operating condition of cooling fan 100 this moment once more, and the result fed back to Auto Electronic Controlled System ECU, the working state of fan 100 is monitored.Auto Electronic Controlled System ECU readjusts according to the output signal of the main control module (MCU) that receives, send new PWM digital signal to main control module (MCU) by the pwm signal line, realize the fan short circuit effectively, open circuit and permanent power output control mode.So far, finish a work cycle.The principle that second control circuit is controlled another cooling fan is identical with said method, so do not repeat.
In a kind of automobile engine cooling fan controller of the utility model, pulse width modulated drive signal equal and opposite in direction, the direction of the fan electromotor driver module output in first fan control circuitry and second fan control circuitry are opposite, drive two fan motor runs with running simultaneously.The drive circuit of two fans and sample circuit are respectively the relations that walks abreast, so when a transportation work style fan-out problem, another transportation work style fan still can run well.
See also Fig. 5, Fig. 5 is the handling process schematic representation of the main control module of this utility car engine cooling fan controller.At first main control module (MCU) is carried out initialization process, then judges to have or not the input of PWM digital signal,, jump to step s6 if there is not pwm signal input to step s1, waited for for 10 seconds after, jump to step s7.Step s7 shows the fan running state, and the speed of fan reaches maximum value this moment.Then main control module (MCU) processing procedure enters step s10.Step s10 is main control module (MCU) algorithm process process, judges according to the sampled value that obtains from cooling fan whether whole cooling fan controller is in failure state (so-called failure state comprises excess temperature, overcurrent, overvoltage and under-voltage).If failure state, the electronic control system ECU of automobile is given in main control module (MCU) input instruction so, closes fan, implementation step s12.If not failure state, turn back to step s1 so, in step s1, main control module (MCU) enters step s2 so if receive the pwm signal that the electronic control system ECU of automobile transmits.Among the step s2, the dutycycle of pwm signal of input is judged,, entered step s8 so, close fan, carry out the failure state of step s10 again and judge if the value of pwm signal dutycycle is not less than 8% and less than 12%; If the value of pwm signal dutycycle is not less than 13% and less than 85%, the value of the dutycycle of the pwm signal of main control module (MCU) input will increase by 10% so, cooling fan be carried out speed governing handle, main control module (MCU) processing system arrival step s9.Along with the end of step s9 processing procedure, the system handles process is again with implementation step s10.If the pwm signal that the electronic control system ECU of automobile sends does not satisfy step s2, s3, main control module (MCU) processing procedure will enter step s4 so, whether the value of judging the dutycycle of the pwm signal that main control module this moment (MCU) receives is not less than 86% and less than 95%, if, the process of implementation step s7 so again.If the value of the dutycycle of pwm signal does not all meet within the above-mentioned data area of discussing, the value such as the step s5 that are the dutycycle of pwm signal describe, main control module (MCU) is with implementation step s11 so, after waiting for for 10 seconds, turn back to step s7 state once more, the step s10 when then wind speed being reached maximum handles.When only the condition of s10 is genuine in steps, whole main control module (MCU) processing procedure finishes, otherwise main control module (MCU) enters the endless loop state, according to the different temperatures of engine cabin that samples and controller and the different rotating speeds of fan, can export the PWM digital signal always, fan speed is handled.In this process, because pwm signal has the effect of opposing noise, and the output accuracy height, thereby be energy-conservation environmental protection again concerning whole automobile engine cooling fan controller.
Because the utility model has adopted relatively independent controlling and driving mode, not only can realize that two-way automobile engine cooling fan working condition do not disturb mutually, and according to the pulsewidth modulation electronic control mode, except that having accurate wind speed regulatory function, can also play the effect of energy-saving and emission-reduction, through measuring and calculating, hundred kilometers/oil consumption expense can reduce by 2～3 yuans.
The above only is preferred embodiment of the present utility model, and all equivalences of doing according to claim of the present utility model change and modify, and all should belong to the scope that the utility model is contained.
Claims (9)
1. automobile engine cooling fan controller is characterized in that:
Comprise two automobile engine cooling fans;
Described automobile engine cooling fan controller comprises housing and is arranged on the power module that the interior control circuit and of housing provides each element work in the control circuit;
Described control circuit comprises a main control module, two fan control circuitrys;
Described main control module is electrically connected with the electronic control system of automobile is two-way, this main control module and respectively with described two two-way electrical connections of fan control circuitry;
Described each fan control circuitry is electrically connected with the motor of an automobile engine cooling fan is two-way.
2. a kind of automobile engine cooling fan controller according to claim 1 is characterized in that, also comprises a controller temperature control module, and described controller temperature control module is made of the temp .-sensitive diodes and the bleeder circuit that are arranged in the controller shell; The output terminal of this controller temperature control module is electrically connected with the input end of main control module.
3. a kind of automobile engine cooling fan controller according to claim 1 is characterized in that, also comprises the voltage/current detection module of a fan electromotor, and the voltage/current detection module of described fan electromotor mainly is made of bleeder circuit; The output terminal of this module is electrically connected with the input end of main control module, and the input end of this module is electrically connected with the motor of two automobile engine cooling fans.
4. a kind of automobile engine cooling fan controller according to claim 1 is characterized in that the structure of described two fan control circuitrys is identical, respectively comprises a fan electromotor driver module and a current/voltage sampling module; The input end of described fan electromotor driver module is electrically connected with the output terminal of described main control module, and the output terminal of this fan electromotor driver module is electrically connected with the motor input end of separately an automobile engine cooling fan;
The input end of described current/voltage sampling module is electrically connected with the motor output end of separately an automobile engine cooling fan, the input end of this current/voltage sampling module also is electrically connected with the output terminal of described fan electromotor driver module, and the output terminal of this current/voltage sampling module is electrically connected with the input end of described main control module.
5. a kind of automobile engine cooling fan controller according to claim 4 is characterized in that, described fan electromotor driver module comprises a gate drive circuit and a power tube switching circuit; The input end of described gate drive circuit is electrically connected with an output terminal of described main control module, and the output terminal of described gate drive circuit is electrically connected with the input end of described power tube switching circuit; The output terminal of described power tube switching circuit is electrically connected with the input end of separately an automobile engine cooling fan motor;
Described current/voltage sampling module comprises a voltage sampling circuit, a current sampling circuit and a signal amplification circuit; The input end of described voltage sampling circuit is electrically connected with the output terminal of the motor of separately an automobile engine cooling fan, and the input end of this voltage sampling circuit also is electrically connected with the output terminal of power tube switching circuit in the described gate drive circuit; The output terminal of described voltage sampling circuit is electrically connected with the input end of main control module; The input end of described current sampling circuit is electrically connected with the output terminal of separately an automobile engine cooling fan motor, the output terminal of this current sampling circuit is electrically connected with the input end of signal amplification circuit, and the output terminal of this signal amplification circuit is electrically connected with the input end of main control module.
6. a kind of automobile engine cooling fan controller according to claim 1, it is characterized in that described main control module comprises a pulse-width signal capture unit, one first filter unit, a judgment processing unit, a storage unit, one second filter unit, one the one A/D conversion port, two groups of A/D conversion ports and two pulse-width signal output units; Described pulse-width signal capture unit is connected with the electronic control system of automobile is two-way, the output terminal of this pulse-width signal capture unit is electrically connected with an A/D conversion port, the output terminal of the one A/D conversion port is electrically connected with the input end of first filter unit, and the output terminal of described first filter unit is electrically connected with the input end of described judgment processing unit; Described storage unit and two-way connection of described judgment processing unit; The output terminal of each fan control circuitry in described two fan control circuitrys is electrically connected with the input end of described second filter unit by one group of A/D conversion port respectively, and the output terminal of described second filter unit is electrically connected with the input end of described judgment processing unit; The output terminal of described judgment processing unit connects the input end of two pulse-width signal output units respectively, and the output terminal of each the pulse-width signal output unit in described two pulse-width signal output units is electrically connected with the input end of a fan control circuitry respectively.
7. a kind of automobile engine cooling fan controller according to claim 6 is characterized in that, also comprises a fan power supply testing module, and described fan power supply testing module mainly is made of a bleeder circuit; Described main control module also comprises one the 2nd A/D conversion port and one the 3rd filter unit; The input end of described fan power supply testing module is electrically connected with the motor of two automobile engine cooling fans respectively, the output terminal of this fan power supply testing module is electrically connected with the input end of described the 2nd A/D conversion port, the output terminal of described the 2nd A/D conversion port is electrically connected with the input end of described the 3rd filter unit, and the output terminal of described the 3rd filter unit is electrically connected with the input end of described judgment processing unit.
8. a kind of automobile engine cooling fan controller according to claim 6 is characterized in that, also comprises a temperature control module, and described temperature control module mainly is made of the temp .-sensitive diodes and the bleeder circuit that are arranged in the controller shell; Described main control module also comprises one the 3rd A/D conversion port and one the 4th filter unit, the output terminal of described temperature control module is electrically connected with the input end of the 3rd A/D conversion port, the output terminal of described the 3rd A/D conversion port is electrically connected with the input end of described the 4th filter unit, and the output terminal of described the 4th filter unit is electrically connected with the input end of described judgment processing unit.
9. a kind of automobile engine cooling fan controller according to claim 6, it is characterized in that: the structure of described two fan control circuitrys is identical, respectively comprises a fan electromotor driver module and a current/voltage sampling module; Wherein:
Described fan electromotor driver module comprises a gate drive circuit and a power tube switching circuit that is linked in sequence; The input end of described gate drive circuit is electrically connected with the output terminal of a pulse-width signal output unit of described main control module, and the output terminal of this gate drive circuit is electrically connected with the input end of described power tube switching circuit; The output terminal of described power tube switching circuit is electrically connected with the motor input end of separately an automobile engine cooling fan;
Described current/voltage sampling module comprises a voltage sampling circuit, a current sampling circuit and a signal amplification circuit; The input end of described voltage sampling circuit is electrically connected with the output terminal of the motor of separately an automobile engine cooling fan and the output terminal of the power tube switching circuit in the gate drive circuit separately respectively, and the A/D conversion port in one group of A/D conversion port of the output terminal of this voltage sampling circuit and main control module is electrically connected; The input end of described current sampling circuit is electrically connected with the output terminal of the motor of separately an automobile engine cooling fan, and the output terminal of this current sampling circuit is electrically connected with the input end of signal amplification circuit; Another A/D conversion port in above-mentioned one group of A/D conversion port of the output terminal of described signal amplification circuit and main control module is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202091847U CN201475020U (en) | 2009-09-04 | 2009-09-04 | Controller of automobile-engine cooling fans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202091847U CN201475020U (en) | 2009-09-04 | 2009-09-04 | Controller of automobile-engine cooling fans |
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| Publication Number | Publication Date |
|---|---|
| CN201475020U true CN201475020U (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009202091847U Expired - Lifetime CN201475020U (en) | 2009-09-04 | 2009-09-04 | Controller of automobile-engine cooling fans |
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| CN (1) | CN201475020U (en) |
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| CN102400935A (en) * | 2011-12-05 | 2012-04-04 | 江苏浩峰汽车附件有限公司 | Novel automobile multi-fan intelligent controller |
| CN103415663A (en) * | 2011-03-09 | 2013-11-27 | 哈姆股份公司 | Self-propelled construction device, in particular a soil compactor |
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| CN104863684A (en) * | 2015-06-09 | 2015-08-26 | 北汽福田汽车股份有限公司 | Vehicle and monitoring method and monitoring system of cooling fan motor of vehicle |
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- 2009-09-04 CN CN2009202091847U patent/CN201475020U/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103415663A (en) * | 2011-03-09 | 2013-11-27 | 哈姆股份公司 | Self-propelled construction device, in particular a soil compactor |
| US9822736B2 (en) | 2011-03-09 | 2017-11-21 | Hamm Ag | Self-propelled construction device, in particular a soil compactor |
| CN102400935A (en) * | 2011-12-05 | 2012-04-04 | 江苏浩峰汽车附件有限公司 | Novel automobile multi-fan intelligent controller |
| CN102400935B (en) * | 2011-12-05 | 2015-01-14 | 江苏浩峰汽车附件有限公司 | Novel automobile multi-fan intelligent controller |
| CN103939377A (en) * | 2014-05-06 | 2014-07-23 | 安徽江淮汽车股份有限公司 | Stepless speed regulation radiator fan control assembly and method |
| CN103939377B (en) * | 2014-05-06 | 2016-01-20 | 安徽江淮汽车股份有限公司 | A kind of stepless speed regulation radiator fan controls assembly and method |
| CN104863684A (en) * | 2015-06-09 | 2015-08-26 | 北汽福田汽车股份有限公司 | Vehicle and monitoring method and monitoring system of cooling fan motor of vehicle |
| CN109612893A (en) * | 2018-12-29 | 2019-04-12 | 安徽春暖花开环境科技有限公司 | A kind of automobile-used laser fine particle detection device |
| CN109857232A (en) * | 2019-02-28 | 2019-06-07 | 苏州浪潮智能科技有限公司 | A kind of control method for fan, system, device and computer readable storage medium |
| CN109857232B (en) * | 2019-02-28 | 2021-08-10 | 苏州浪潮智能科技有限公司 | Fan control method, system, device and computer readable storage medium |
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