CN114278473B - Filter automatic drainage circuit, device and method and automobile - Google Patents
Filter automatic drainage circuit, device and method and automobile Download PDFInfo
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- CN114278473B CN114278473B CN202111582359.0A CN202111582359A CN114278473B CN 114278473 B CN114278473 B CN 114278473B CN 202111582359 A CN202111582359 A CN 202111582359A CN 114278473 B CN114278473 B CN 114278473B
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Abstract
The invention discloses an automatic draining circuit, device and method of a filter and an automobile. Get the electricity from whole car power supply through voltage stabilizing circuit, reduced the loaded down with trivial details operation of using the monitoring electric quantity that the battery brought for the controller power supply and changing the battery, promoted driver's driving experience greatly to realized the automatic drainage of vehicle filter through the controller, solved the troublesome technical problem that influences driving experience of vehicle filter drainage that exists among the prior art again, reached the technical effect of filter automatic drainage under the prerequisite that need not to change the battery, promoted user experience.
Description
Technical Field
The embodiment of the invention relates to the technical field of automobiles, in particular to an automatic filter drainage circuit, an automatic filter drainage device and an automatic filter drainage method, and an automobile.
Background
The main function of the fuel filter is to remove solid impurities such as ferric oxide and dust contained in the fuel, prevent the fuel system from being blocked, reduce mechanical abrasion, ensure the stable operation of the engine and improve the reliability.
At present, most of water filtered by an automobile fuel filter is collected in a water accumulation cup, a water level sensor and a drain valve are integrated at the bottom of the water accumulation cup, when the water level exceeds a certain height, the water level sensor outputs an alarm signal, and after a driver sees the alarm signal, the drain valve is manually unscrewed after the automobile fuel filter stops to drain water in the water accumulation cup. Through this kind of drainage, the water yield of discharging relies on driver's experience completely, and when the water yield was too much, can incidentally also discharge the filter with the fuel, causes environmental pollution and economic waste, and the water yield is too little, and two drainage time interval is short, and the driver should often park and the drainage of getting off, causes inconvenience for normal driving.
Disclosure of Invention
The embodiment of the invention provides an automatic drainage circuit of a filter, which achieves the technical effect of automatic drainage of the filter on the premise of not changing a battery.
In a first aspect, the invention provides an automatic filter drainage circuit, which comprises a whole vehicle power supply, a sensor, a controller and a switch circuit; the controller is respectively connected with the whole vehicle power supply, the sensor and the switch circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the whole vehicle power supply is used for supplying power to the controller;
the sensor is used for sending an analog signal to the controller according to the collected water surface height;
the controller is used for converting the voltage sent by the whole vehicle power supply into a preset voltage to supply power for the controller and the sensor, collecting the output signal of the sensor and controlling the switch circuit to be opened and closed according to the output signal;
and the switch circuit starts water drainage when being opened and stops water drainage when being closed.
Preferably, the automatic filter drainage circuit comprises an actuator, and the controller comprises a voltage stabilizing circuit, an analog signal acquisition circuit, a switching signal output circuit and a field effect transistor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the power supply voltage stabilizing circuit is connected with the whole vehicle power supply and is used for converting a power supply sent by the whole vehicle power supply into a preset voltage and then supplying power to the switching signal output circuit;
the analog signal acquisition circuit is connected with the sensor and used for acquiring an output signal of the sensor;
the switch signal acquisition circuit is connected with the switch circuit and used for acquiring the switching state of the switch circuit;
the switching signal output circuit is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is connected with the cathode of the whole vehicle power supply, the drain electrode of the field effect tube is connected with one end of the actuator, and the other end of the actuator is connected with the anode of the whole vehicle power supply and used for controlling the opening and closing of the filter drainage pipeline through the switching circuit.
Preferably, the sensor comprises a signal processing circuit, a common probe, a first probe, a second probe and a third probe; the public probe, the first probe, the second probe and the third probe are respectively connected with the signal processing circuit, and the signal processing circuit is also connected with the signal acquisition circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the liquid level detected by the first probe is smaller than that detected by the second probe, the liquid level detected by the second probe is smaller than that detected by the third probe, and the signal processing circuit is used for acquiring resistance values of the common probe and the first, second and third probes and sending the acquired resistance information to the signal acquisition circuit.
Preferably, the automatic filter drainage circuit further comprises an ECU, and the ECU is connected with the controller; wherein, the liquid crystal display device comprises a liquid crystal display device,
and the ECU is used for receiving the water draining signal sent by the controller and preventing the vehicle from starting according to the water draining signal.
Preferably, the controller further comprises a bus communication circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the bus communication circuit is connected with the ECU and is used for sending a water draining signal to the ECU.
Preferably, the power supply voltage stabilizing circuit comprises a protection circuit, a voltage stabilizing circuit, a first capacitor and a second capacitor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the positive input end of the protection circuit is connected with the positive electrode of the whole vehicle power supply, the negative input end of the protection circuit is connected with the negative electrode of the whole vehicle power supply, the positive output end of the protection circuit is connected with one end of the first capacitor and the positive input end of the voltage stabilizing circuit, the negative output end of the protection circuit is connected with the other end of the first capacitor and the negative input end of the voltage stabilizing circuit, the positive output end of the voltage stabilizing circuit is connected with one end of the second capacitor and the positive output end of the power stabilizing circuit, and the negative output end of the voltage stabilizing circuit is connected with the other end of the second capacitor and the negative output end of the power stabilizing circuit.
Preferably, the protection circuit comprises a bidirectional voltage stabilizing diode, a third capacitor and a diode; wherein, the liquid crystal display device comprises a liquid crystal display device,
the one end of bidirectional voltage-stabilizing diode is the positive input of protection circuit with the positive pole of whole car power supply, the one end of third electric capacity and the input of diode is connected respectively, bidirectional voltage-stabilizing diode's the other end is protection circuit's negative input with whole car power supply's negative pole and the other end of third electric capacity is connected, the other end of third electric capacity is protection circuit's negative output, the output of diode is protection circuit's positive output.
The invention also provides an automatic filter drainage device which comprises the automatic filter drainage circuit.
The invention also provides an automatic filter drainage method, which specifically comprises the following steps:
the whole vehicle power supply supplies power for the controller;
the sensor sends an analog signal to the controller according to the collected water surface height;
the controller converts the voltage sent by the whole vehicle power supply into a preset voltage to supply power for the controller and the sensor, collects output signals of the sensor and controls the switching circuit to be switched on and off according to the output signals;
and the switch circuit starts water drainage when being opened and stops water drainage when being closed.
The invention also proposes an automobile comprising the filter automatic drainage device as described above, or the automobile applying the filter automatic drainage method as described above.
According to the invention, the voltage stabilizing circuit is used for taking electricity from the whole vehicle power supply, so that the complicated operations of monitoring the electric quantity and replacing the battery caused by using the battery to supply power to the controller are reduced, the driving experience of a driver is greatly improved, the automatic drainage of the vehicle filter is realized through the controller, the technical problem that the driving experience is influenced by the trouble of draining the vehicle filter in the prior art is solved, the technical effect of automatically draining the filter is achieved on the premise that the battery is not required to be replaced, and the user experience is improved.
Drawings
FIG. 1 is a functional block diagram of one embodiment of a task automatic configuration circuit of the present invention;
FIG. 2 is a functional block diagram of another embodiment of the task automatic configuration circuit of the present invention;
FIG. 3 is a schematic circuit diagram of another embodiment of the task automatic configuration circuit of the present invention;
FIG. 4 is a flow chart of an embodiment of a task auto-configuration method according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
FIG. 1 is a functional block diagram of an automatic filter drain circuit according to an embodiment of the present invention, including a power supply, a sensor, a controller, and a switching circuit; the controller is respectively connected with the whole vehicle power supply, the sensor and the switch circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the whole vehicle power supply is used for supplying power to the controller;
the sensor is used for sending an analog signal to the controller according to the collected water surface height;
the controller is used for converting the voltage sent by the whole vehicle power supply into a preset voltage to supply power for the controller and the sensor, collecting the output signal of the sensor and controlling the switch circuit to be opened and closed according to the output signal;
the switch circuit starts the water discharge when opened and stops the water discharge when closed.
It is worth emphasizing that, because the actual condition of the vehicle limits, the drainage can only be carried out in the parking state, and under the parking state, the existing drainage circuit is unpowered, and part of parts in the automatic drainage circuit of the filter can overheat and even burn out the coil under long-time energization, so that the controller needs to judge in real time that the time interval of the two times of drainage is not shorter than the preset time in the interior, so that the actuator is sufficiently cooled, and then an additional power supply is needed to supply power to the automatic drainage circuit of the filter under the parking state, so as to realize the timing function.
It will be readily appreciated that if battery powered, the battery has a limited life, the charge of the battery needs to be monitored and the battery replaced to a maintenance station, which presents an inconvenience to the driver. In this embodiment, the power of the controller is directly supplied by the whole vehicle storage battery, low-power-consumption electronic components are used in the controller, the controller enters a sleep working mode in a parking state, most of functional modules stop working, and the standby current of the controller in the sleep mode is within 1 milliamp.
It should be noted that, use the whole car power supply to supply power for the controller needs to handle voltage and voltage stability of whole car power supply output, and can not directly use, for the total electric quantity of whole car power supply, the electric quantity that the controller consumed is minimum, and whole car power supply is chargeable power supply, can charge it in the vehicle driving process, the electric quantity of whole car power supply has been monitored in the car, and to the more familiarity of the change maintenance personal of whole car power supply, and because the electric quantity that realizes automatic drainage function is minimum, the influence of whole car power supply is little, and can not just reduce whole car power supply life by a wide margin because of using whole car power supply.
According to the technical scheme, the voltage stabilizing circuit is used for taking electricity from the whole vehicle power supply, the complicated operation of monitoring electric quantity and replacing the battery, which are caused by the fact that the battery is used for supplying power to the controller, is reduced, the driving experience of a driver is greatly improved, automatic drainage of the vehicle filter is realized through the controller, the technical problem that the driving experience is influenced by the trouble of drainage of the vehicle filter in the prior art is solved, the technical effect of automatic drainage of the filter is achieved on the premise that the battery is not required to be replaced, and the user experience is improved.
The automatic drainage circuit of the filter provided by the invention further comprises an actuator, wherein the controller comprises a voltage stabilizing circuit, an analog signal acquisition circuit, a switching signal output circuit and a field effect transistor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the power supply voltage stabilizing circuit is connected with the whole vehicle power supply and is used for converting a power supply sent by the whole vehicle power supply into a preset voltage and then supplying power to the switching signal output circuit;
the analog signal acquisition circuit is connected with the sensor and used for acquiring an output signal of the sensor;
the switch signal acquisition circuit is connected with the switch circuit and used for acquiring the switching state of the switch circuit;
the switch signal output circuit is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is connected with the negative electrode of the whole vehicle power supply, the drain electrode of the field effect tube is connected with one end of the actuator, and the other end of the actuator is connected with the positive electrode of the whole vehicle power supply, and is used for controlling the opening and closing of the filter drainage pipeline through the switch circuit.
It is easy to understand that the controller provides bias for the field effect transistor through the switch signal output to control the actuator to be turned on or off, and in order to prevent the induced voltage generated by the inductive actuator at the moment of power failure from damaging the field effect transistor, a follow current protection circuit can be arranged at the switch signal output part.
The sensor comprises a signal processing circuit, a common probe, a first probe, a second probe and a third probe; the public probe, the first probe, the second probe and the third probe are respectively connected with the signal processing circuit, and the signal processing circuit is also connected with the signal acquisition circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the liquid level detected by the first probe is smaller than that detected by the second probe, the liquid level detected by the second probe is smaller than that detected by the third probe, and the signal processing circuit is used for acquiring resistance values of the common probe and the first, second and third probes and sending the acquired resistance information to the signal acquisition circuit.
It is emphasized that detecting the water level is to detect the water resistance between the common probe and the first to third probes, respectively. When there is no water between the two probes, the two probes only exist in the fuel oil or the air, the resistance between the probes is large, and when there is water between the probes, the water resistance between the probes is tens to thousands of ohms. The signal processing circuit converts the water resistance into an electric signal and outputs the electric signal to the signal acquisition unit of the controller.
It is easy to understand that the third probe is used for setting the ponding height of the filtering system, and when the water level of ponding reaches the detection height of the third probe, a water level alarm signal is output. The controller detects the alarm signal of the water level and controls the actuator to open the water discharge in the parking state. The second probe is used for limiting the water quantity to be discharged, the water level is reduced below a second probe detection area in the water discharging process, the output signal of the second probe is changed from a water state to a water-free state, and the controller can control the actuator to be closed to stop water discharging.
Referring to fig. 2, the filter automatic drain circuit further includes an ECU connected to the controller; wherein, the liquid crystal display device comprises a liquid crystal display device,
the ECU is used for receiving the water draining signal sent by the controller and preventing the vehicle from starting according to the water draining signal.
It is worth emphasizing that the ECU communicates with the controller through a CAN bus protocol, the controller receives the rotating speed signal of the engine through the CAN bus, and if the rotating speed of the engine is not zero before and during the water drainage, the vehicle is in a running state at the moment and the water drainage is not allowed. Correspondingly, in the drainage process, the controller CAN inform the whole vehicle that the whole vehicle is draining through the CAN bus, and the starting of the vehicle is not allowed at the moment.
Specifically, the controller further comprises a bus communication circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the bus communication circuit is connected to the ECU for transmitting a water discharge signal to the ECU.
It should be noted that, the controller sends a series of status information to the whole vehicle ECU through the CAN bus, including: normal water level, high water level alarm, draining, failure of the actuator to open, failure of the actuator to close, failure of the water level sensor, failure of the temperature sensor, failure of the actuator, etc.
Referring to fig. 3, the power supply voltage stabilizing circuit includes a protection circuit, a voltage stabilizing circuit, a first capacitor and a second capacitor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the positive input end of the protection circuit is connected with the positive electrode of the whole vehicle power supply, the negative input end of the protection circuit is connected with the negative electrode of the whole vehicle power supply, the positive output end of the protection circuit is connected with one end of the first capacitor and the positive input end of the voltage stabilizing circuit, the negative output end of the protection circuit is connected with the other end of the first capacitor and the negative input end of the voltage stabilizing circuit, the positive output end of the voltage stabilizing circuit is connected with one end of the second capacitor and the positive output end of the power voltage stabilizing circuit, and the negative output end of the voltage stabilizing circuit is connected with the other end of the second capacitor and the negative output end of the power voltage stabilizing circuit.
It is worth emphasizing that the voltage stabilizing circuit is connected in parallel with the first capacitor and the second capacitor, the first capacitor can process the current input to the voltage stabilizing circuit, filter alternating current and filter peak voltage, the second capacitor also plays the same role, however, the voltage stabilizing circuit outputs charges, and finally the obtained electric energy supplies power for the controller and the sensor through the power supply + end and the power supply-end.
Specifically, the protection circuit comprises a bidirectional voltage stabilizing diode, a third capacitor and a diode; wherein, the liquid crystal display device comprises a liquid crystal display device,
one end of the bidirectional voltage stabilizing diode is a positive input end of the protection circuit and is respectively connected with the positive electrode of the whole vehicle power supply, one end of the third capacitor and the input end of the diode, the other end of the bidirectional voltage stabilizing diode is a negative input end of the protection circuit and is connected with the negative electrode of the whole vehicle power supply and the other end of the third capacitor, the other end of the third capacitor is a negative output end of the protection circuit, and the output end of the diode is a positive output end of the protection circuit.
It should be noted that, the bidirectional zener diode, the third capacitor and the diode mainly prevent the reverse connection element of the power supply and the transient suppression element from performing circuit protection, and both the forward and reverse directions of the bidirectional zener diode have voltage stabilizing effect, as if the two zener diodes are connected in reverse and forward series, the voltage at both ends can be kept unchanged within the allowable current range no matter which direction the voltage at both ends reaches the stable voltage.
According to the embodiment, the technical scheme is perfected by disclosing specific circuit structures and connection relations, the voltage fluctuation of the whole vehicle power supply input to the power supply voltage stabilizing circuit is smaller through the public protection circuit, the power utilization safety of the controller is met, the data total amount and the data precision of signals acquired by the sensor are improved through the specific structure of the public sensor, finer adjustment is achieved in the processing process of the data acquired by the sensor through the controller, for example, drainage control under different water levels is achieved, the perfection degree of automatic drainage is further improved, drivers are prevented from actively participating in filter drainage to the greatest extent, and user experience is further improved.
The invention also provides an automatic filter drainage device which comprises the automatic filter drainage circuit.
The automatic filter drainage device provided by the embodiment of the invention comprises the automatic filter drainage circuit, and has corresponding functional modules and beneficial effects, and is not described in detail herein.
Referring to fig. 4, the present invention further provides an automatic filter draining method, which specifically includes:
s100, a whole vehicle power supply supplies power for a controller;
s200, the sensor sends an analog signal to the controller according to the collected water surface height;
s300, the controller converts the voltage sent by the whole vehicle power supply into a preset voltage to supply power to the controller and the sensor, collects output signals of the sensor and controls the switch circuit to be opened and closed according to the output signals;
and S400, when the switch circuit is opened, water drainage is started, and when the switch circuit is closed, water drainage is stopped.
Of course, the automatic draining method for the filter provided by the embodiment of the invention has the corresponding functional modules and beneficial effects of the circuit, and is not described in detail herein.
The invention also provides an automobile, which comprises the filter automatic drainage device or is applied with the filter automatic drainage method.
Of course, the automobile provided by the embodiment of the invention has the corresponding functional modules and beneficial effects of the circuit and the method, and are not described in detail herein.
From the above description of embodiments, it will be clear to a person skilled in the art that the present invention may be implemented by means of software and necessary general purpose hardware, but of course also by means of hardware, although in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.
It should be noted that, in the above-mentioned embodiments of the search apparatus, each unit and module included are only divided according to the functional logic, but not limited to the above-mentioned division, as long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the present invention.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. An automatic draining circuit of a filter is characterized by comprising a whole vehicle power supply, a sensor, a controller and a switch circuit; the controller is respectively connected with the whole vehicle power supply, the sensor and the switch circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the sensor comprises a signal processing circuit, a common probe, a first probe, a second probe and a third probe; the public probe, the first probe, the second probe and the third probe are respectively connected with the signal processing circuit, and the signal processing circuit is also connected with the signal acquisition circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the liquid level detected by the first probe is smaller than that detected by the second probe, the liquid level detected by the second probe is smaller than that detected by the third probe, and the signal processing circuit is used for respectively acquiring resistance information between the common probe and the first, second and third probes and sending the acquired resistance information to the signal acquisition circuit;
the signal acquisition circuit is used for sending electric signals to the controller according to resistance information among the common probe, the first probe, the second probe and the third probe respectively;
the whole vehicle power supply is used for supplying power to the controller;
the controller is used for converting the voltage sent by the whole vehicle power supply into a preset voltage to supply power for the controller and the sensor, receiving the electric signal sent by the signal acquisition circuit, obtaining the liquid level according to the electric signal sent by the signal acquisition circuit, opening the switch circuit when the liquid level is greater than or equal to the third probe, and closing the switch circuit when the liquid level is less than the second probe;
the switch circuit starts water drainage when being opened and stops water drainage when being closed;
the automatic filter drainage circuit comprises an actuator, and the controller comprises a power supply voltage stabilizing circuit, an analog signal acquisition circuit, a switching signal output circuit and a field effect transistor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the power supply voltage stabilizing circuit is connected with the whole vehicle power supply and is used for converting the voltage sent by the whole vehicle power supply into a preset voltage and then supplying power to the switching signal output circuit;
the analog signal acquisition circuit is connected with the sensor and used for acquiring an output signal of the sensor;
the switch signal acquisition circuit is connected with the switch circuit and used for acquiring the switching state of the switch circuit;
the switching signal output circuit is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is connected with the negative electrode of the whole vehicle power supply, the drain electrode of the field effect tube is connected with one end of the actuator, and the other end of the actuator is connected with the positive electrode of the whole vehicle power supply and used for controlling the opening and closing of the filter drainage pipeline through the switching circuit;
the automatic filter drainage circuit further comprises an ECU, and the ECU is connected with the controller; wherein, the liquid crystal display device comprises a liquid crystal display device,
and the ECU is used for receiving the water draining signal sent by the controller and preventing the vehicle from starting according to the water draining signal.
2. The automatic filter drain circuit according to claim 1, wherein the controller further comprises a bus communication circuit; wherein, the liquid crystal display device comprises a liquid crystal display device,
the bus communication circuit is connected with the ECU and is used for sending a water draining signal to the ECU.
3. The automatic filter drain circuit according to claim 1, wherein the power supply voltage stabilizing circuit comprises a protection circuit, a voltage stabilizing circuit, a first capacitor and a second capacitor; wherein, the liquid crystal display device comprises a liquid crystal display device,
the positive input end of the protection circuit is connected with the positive electrode of the whole vehicle power supply, the negative input end of the protection circuit is connected with the negative electrode of the whole vehicle power supply, the positive output end of the protection circuit is connected with one end of the first capacitor and the positive input end of the voltage stabilizing circuit, the negative output end of the protection circuit is connected with the other end of the first capacitor and the negative input end of the voltage stabilizing circuit, the positive output end of the voltage stabilizing circuit is connected with one end of the second capacitor and the positive output end of the power stabilizing circuit, and the negative output end of the voltage stabilizing circuit is connected with the other end of the second capacitor and the negative output end of the power stabilizing circuit.
4. The automatic filter drain circuit according to claim 3, wherein the protection circuit includes a zener diode, a third capacitor, and a diode; wherein, the liquid crystal display device comprises a liquid crystal display device,
the one end of bidirectional voltage-stabilizing diode is the positive input of protection circuit with the positive pole of whole car power supply, the one end of third electric capacity and the input of diode is connected respectively, bidirectional voltage-stabilizing diode's the other end is protection circuit's negative input with whole car power supply's negative pole and the other end of third electric capacity is connected, the other end of third electric capacity is protection circuit's negative output, the output of diode is protection circuit's positive output.
5. An automatic filter drain device, characterized in that the automatic filter drain device comprises the automatic filter drain circuit according to any one of claims 1 to 4.
6. An automatic filter draining method, wherein the automatic filter draining method is applied to the automatic filter draining device according to claim 5, and specifically comprises the following steps:
the signal processing circuit acquires resistance information between the common probe and the first probe, the second probe and the third probe respectively, and sends the acquired resistance information to the signal acquisition circuit;
the signal acquisition circuit sends electric signals to the controller according to resistance information among the common probe, the first probe, the second probe and the third probe;
the whole vehicle power supply supplies power for the controller;
the controller converts the voltage sent by the whole vehicle power supply into a preset voltage to supply power for the controller and the sensor, receives the electric signal sent by the signal acquisition circuit, obtains the liquid level according to the electric signal sent by the signal acquisition circuit, opens the switch circuit when the liquid level is greater than or equal to the third probe, and closes the switch circuit when the liquid level is less than the second probe;
and the switch circuit starts water drainage when being opened and stops water drainage when being closed.
7. An automobile comprising the automatic filter drain device according to claim 5, or the automobile applying the automatic filter drain method according to claim 6.
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| CN202111582359.0A CN114278473B (en) | 2021-12-22 | 2021-12-22 | Filter automatic drainage circuit, device and method and automobile |
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| CN202111582359.0A CN114278473B (en) | 2021-12-22 | 2021-12-22 | Filter automatic drainage circuit, device and method and automobile |
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| CN114278473B true CN114278473B (en) | 2023-07-04 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5941654A (en) * | 1982-08-31 | 1984-03-07 | Tsuchiya Mfg Co Ltd | Automatic drain type fuel filter |
| CN103207628B (en) * | 2013-03-29 | 2016-06-01 | 北京经纬恒润科技有限公司 | A kind of automobile-used filtering discharges water Controlling System, drainage system and method |
| CN105927433B (en) * | 2016-06-02 | 2019-01-25 | 北汽福田汽车股份有限公司 | The automatic bleeder and automatic draining method and vehicle of fuel filter |
| CN109252995A (en) * | 2018-09-11 | 2019-01-22 | 潍柴动力股份有限公司 | A kind of water quantity control method of fuel filter, control device |
| CN209313421U (en) * | 2019-02-26 | 2019-08-27 | 晟道科技石家庄有限公司 | A kind of accessory power supply voltage regulator circuit of included overheat protector function |
| CN212721638U (en) * | 2020-06-22 | 2021-03-16 | 潍柴动力股份有限公司 | Water level sensor, fuel filter with same and vehicle |
| CN214851014U (en) * | 2021-04-30 | 2021-11-23 | 深圳市唯川科技有限公司 | Power supply voltage stabilizing circuit and power supply voltage stabilizing device |
| CN113464333B (en) * | 2021-07-28 | 2022-10-28 | 上海弗列加滤清器有限公司 | Drainage control method and device of fuel filter, fuel filter and medium |
| CN113638833B (en) * | 2021-08-10 | 2022-09-09 | 浙江新柴股份有限公司 | Control method for automatic water drainage of engine filter |
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