CN212389456U - Fuel filter with air detection function and fuel supply system - Google Patents
Fuel filter with air detection function and fuel supply system Download PDFInfo
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- CN212389456U CN212389456U CN202020919179.1U CN202020919179U CN212389456U CN 212389456 U CN212389456 U CN 212389456U CN 202020919179 U CN202020919179 U CN 202020919179U CN 212389456 U CN212389456 U CN 212389456U
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Abstract
The utility model discloses a fuel filter with air detection function, a filter element is arranged in a shell, a cavity is arranged between the filter element and the inner wall of the shell, and an engine of a motor vehicle is connected with an oil tank through an oil return pipe; the outlet of the central tube of the filter element is used as the oil outlet of the fuel filter or is communicated with the oil outlet of the fuel filter; the top of cavity is equipped with level sensor, and level sensor is connected with electrically controlled device, and electrically controlled device is connected with the electric pump for bleeding, and the electric pump for bleeding is connected with intake pipe and outlet duct, and the intake pipe lets in the top of cavity and intake pipe top and is higher than level sensor's monitoring liquid level. The utility model also discloses a fuel feed system. The utility model discloses compact structure through the initiative oil level of surveying, when a large amount of gases appear in the fuel filter such as when the engine starts, through opening to bleed and carry out the degasification rapidly with the electric pump initiative, guarantees engine reliable operation, has prolonged the life of bleeding and using the electric pump.
Description
Technical Field
The utility model relates to a motor vehicle fuel filters technical field, concretely relates to survey and corresponding control to appearing the air in the fuel.
Background
The fuel filter is used as an important part of an engine fuel system, and has the functions of filtering impurities, water and other pollutants in fuel, providing clean fuel, preventing a fuel spray nozzle from being rusted and blocked, avoiding carbon deposition in a combustion chamber of an engine, further ensuring the normal operation of the fuel system, improving the reliability and prolonging the service life of the engine.
The existing fuel supply system comprises a fuel tank, a fuel filter and an engine, wherein the fuel filter comprises a shell, a filter element is arranged in the shell, the filter element is provided with a central tube, a cavity is arranged between the filter element and the inner wall of the shell, and the fuel tank is connected with the cavity through a fuel supply pipe; the fuel oil in the cavity passes through the filter layer and is filtered and then enters the central pipe, and the outlet of the central pipe is used as the oil outlet of the fuel oil filter (or the outlet of the central pipe is connected with the oil outlet of the fuel oil filter, and the two are the same technical scheme);
the engine is internally provided with an electric pump for pumping oil, the electric pump for pumping oil is connected with an oil inlet pipe, and the oil inlet pipe is communicated with an oil outlet of the fuel oil filter; when the engine works, the electric pump for pumping oil at the engine is started, negative pressure is generated at the fuel filter, and fuel oil in the oil tank is conveyed to the fuel filter under the action of the negative pressure.
In order to ensure sufficient oil supply of the engine, excessive oil supply is generated when the engine is supplied with oil. Therefore, the engine is usually connected with an oil return pipe, the oil return pipe is communicated with the oil tank, and redundant fuel oil in the engine flows back into the oil tank through the oil return pipe.
With the use of the product, the fuel filter can cause air in fuel to be separated out after being supersaturated due to the change of system pressure during the use process. If the treatment is not carried out in time, a large amount of air enters the engine, and abnormal conditions such as flameout of the engine can be caused.
Since the air in the fuel is separated out under different pressures, which is a normal physical phenomenon, the air cannot be avoided and only can be treated.
The current common mode is to add an air treatment device in the fuel filter to treat the air and then enter the engine. This process is continuous and slow and does not detect air; for example, a large amount of air generated at the moment of starting (the oil passage becomes a negative pressure state at the time of starting the engine, and a large amount of air is generated and is focused in the fuel filter due to pressure reduction) is not specially treated, and a large amount of air accumulated during use is not specially treated, so that there is a certain risk of reliability of engine operation, and when a large amount of air is generated in the fuel filter, degassing cannot be actively and rapidly performed. Therefore, it is desirable to provide a structure to solve the air detection and timely and active fast processing problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fuel filter who possesses air detection function, the volume through measuring the air accumulation and for the initiative start-up gets rid of the air and provide the basis, can be to producing the condition of a large amount of gases in the fuel filter.
In order to achieve the purpose, the fuel filter of the utility model comprises a shell, a filter element is arranged in the shell, the filter element is provided with a central tube, a cavity for accommodating fuel oil supplied by an oil tank is arranged between the filter element and the inner wall of the shell, and an engine of a motor vehicle is connected with the oil tank through an oil return tube; the outlet of the central pipe is used as an oil outlet of the fuel filter or is communicated with the oil outlet of the fuel filter; the oil outlet of the fuel filter is connected with an engine of a motor vehicle through an oil inlet pipe; the top of cavity is equipped with level sensor, and level sensor is connected with electrically controlled device, and electrically controlled device is connected with the electric pump for bleeding, and the electric pump for bleeding is connected with intake pipe and outlet duct, and the intake pipe lets in the top of cavity and intake pipe top are higher than level sensor's monitoring liquid level, and the outlet duct communicates with each other or communicates with each other with advancing oil pipe with returning oil pipe.
The oil outlet of the fuel filter is positioned at the top of the shell of the fuel filter or at the bottom of the shell of the fuel filter.
The utility model also aims to provide a fuel supply system adopting the fuel filter with the air detection function, which comprises a fuel tank, the fuel filter with the air detection function and an engine, wherein the fuel tank is connected with a cavity between the filter element and the inner wall of the shell through a fuel supply pipe; the engine is internally provided with an electric pump for oil pumping, the electric pump for oil pumping is connected with the oil inlet pipe, and the oil inlet pipe is communicated with an oil outlet of the fuel filter; the engine is connected with an oil return pipe, and the oil return pipe is connected with an oil tank.
The utility model discloses have following advantage:
the pressure at the fuel filter decreases at the moment of engine start, more air is resolved from the oil, and a large amount of air may be generated. The existing technical scheme for continuously treating the gas separated out from the fuel oil cannot be applied to the situation that a large amount of gas appears in the fuel oil filter.
The utility model discloses an initiatively survey the oil level (the lower gas quantity of oil level is big more), when a large amount of gas appear in fuel filter when the engine starts etc, through opening to bleed and carry out the degasification with the electric pump initiative rapidly, guarantee the reliability of engine work, bleed simultaneously and need not last work with the electric pump, reduced the burden of bleeding and using the electric pump, improved its life.
The utility model can pressurize the gas and then enter the oil inlet pipe or the oil return pipe while degassing, and the pressure is higher when the gas enters the oil inlet pipe (the gas pressure is ensured by the electric pump for pumping), so that most of the gas is dissolved into the fuel oil again, thereby ensuring the normal work of the engine; of course, when the gas enters the oil return pipe, the gas does not need to be pressurized, and only the gas can be ensured to flow back into the oil tank.
The cylindrical filter element has the advantages of large filter area and higher filter effect compared with a flat filter layer structure. Adopt the utility model discloses a structure has realized the gas removal structure to the cylinder filter core, neither reduces the filter effect, has strengthened the reliability of engine work again.
The outlet duct lets in into oil pipe or returns oil pipe, compares and directly lets in engine or oil tank, can make full use of current engine advance oil pipe and return oil pipe, reduces the length of outlet duct, both save material, conveniently install again in the limited space of motor vehicle.
The top end of the air inlet pipe is higher than the monitoring liquid level of the liquid level sensor, so that the air is pumped by the electric pump for air suction.
The electric pump for air exhaust is started when the time delay of the liquid level signal cannot be detected at the monitoring liquid level position is more than 0.5 second, so that the situation that the liquid level signal cannot be detected at the monitoring liquid level position due to other factors such as motor vehicle shaking can be avoided, and more accurate degassing operation is carried out. The utility model discloses an air exhaust and take gas out and pressurize with the electric pump, pressure will be higher than the pressure when being sent to the oil tank when being sent to the engine for can make more gas dissolve the fuel that advances in the oil pipe again when being sent to the engine, oil the negative pressure that causes in the oil circuit, cause the influence that gaseous appears with the electric pump when starting towards the engine. Meanwhile, the increased pressure for the gas is lower when the gas is sent to the oil tank, so that the gas is ensured to flow back to the oil tank, and energy is not wasted excessively.
Drawings
FIG. 1 is a schematic structural diagram of a fuel supply system according to a first embodiment, namely a schematic structural diagram of the fuel supply system when an outlet pipe is communicated with an inlet pipe and an outlet of a fuel filter is positioned at the bottom of a housing of the fuel filter;
FIG. 2 is a schematic structural diagram of a fuel supply system according to a second embodiment, namely a schematic structural diagram of the fuel supply system when the air outlet pipe is communicated with the oil return pipe and the oil outlet of the fuel filter is positioned at the bottom of the housing of the fuel filter;
FIG. 3 is a schematic structural diagram of a fuel supply system according to a third embodiment, namely a schematic structural diagram of the fuel supply system when an outlet pipe is communicated with an inlet pipe and an outlet of a fuel filter is positioned at the top of a housing of the fuel filter;
fig. 4 is a schematic structural diagram of a fuel supply system according to a fourth embodiment, that is, a schematic structural diagram of the fuel supply system when the air outlet pipe is communicated with the oil return pipe and the oil outlet of the fuel filter is positioned at the top of the housing of the fuel filter.
The direction of the arrows in fig. 1 to 4 is the direction of flow of the fluid there.
Detailed Description
As shown in fig. 1 to 4, the fuel filter of the present invention includes a casing 1, a filter element 2 is disposed in the casing 1, the filter element 2 has a central tube 3, a cavity 4 for accommodating fuel supplied from a fuel tank 6 is disposed between the filter element 2 and the inner wall of the casing 1, and an engine 9 of a motor vehicle is connected to the fuel tank 6 through an oil return tube 5;
the fuel in the cavity 4 passes through the filter layer of the filter element 2 and enters the central tube 3 after being filtered, and the outlet of the central tube 3 is used as an oil outlet 7 of the fuel filter or is communicated with the oil outlet 7 of the fuel filter; the oil outlet 7 of the fuel filter is used for being connected with an engine 9 of a motor vehicle through an oil inlet pipe 8;
the top of cavity 4 is equipped with level sensor 10, and level sensor 10 is connected with electrically controlled device, and electrically controlled device is connected with the electric pump 11 for pumping, and the electric pump 11 for pumping is connected with intake pipe 12 and outlet duct 13, and intake pipe 12 lets in the top of cavity 4 and the intake pipe 12 top are higher than level sensor 10's monitoring liquid level (in fig. 1-4, level sensor 10's lower extreme is its monitoring liquid level), and outlet duct 13 communicates with each other or communicates with each other with advancing oil pipe 8 with returning oil pipe 5.
The electric control device can be arranged on the electric pump 11 for air extraction, on the housing 1 of the fuel filter or on other parts of the motor vehicle. The electric control device may be an integrated circuit or a single chip, such as a chip-type integrated circuit, which is a prior art and is not shown in the figure.
The pressure at the fuel filter decreases at the moment of starting the engine 9, more air is extracted from the oil and a large amount of air may be generated. The existing technical scheme for continuously treating the gas separated out from the fuel oil cannot be applied to the situation that a large amount of gas appears in the fuel oil filter.
The utility model discloses an initiatively survey the oil level (the lower gas volume of oil level is big more), when a large amount of gas appear in the fuel filter when engine 9 starts, can carry out the degasification rapidly through opening 11 initiatively of electric pump for bleeding, guarantee the reliability of engine 9 work.
The utility model can pressurize the gas and then enter the oil inlet pipe 8 or the oil return pipe 5 while degassing, and the pressure is higher when the gas enters the oil inlet pipe 8 (the gas pressure is ensured by the electric pump 11 for pumping), so that most of the gas is dissolved into the fuel again, thereby ensuring the normal work of the engine 9; of course, when the gas enters the return pipe 5, it is not necessary to apply a high pressure to the gas, but only to ensure that the gas can flow back into the tank 6.
The cylindrical filter element 2 has the advantages of large filter area and higher filter effect compared with a flat filter layer structure. Adopt the utility model discloses a structure has realized the gas removal structure to cylinder filter core 2, neither reduces the filter effect, has strengthened the reliability of 9 works of engine again.
The air outlet pipe 13 is communicated with the oil inlet pipe 8 or the oil return pipe 5, compared with the direct communication of the engine 9 or the oil tank 6, the existing oil inlet pipe 8 and the oil return pipe 5 of the engine 9 can be fully utilized, the length of the air outlet pipe 13 is reduced, materials are saved, and the installation in the limited space of the motor vehicle is convenient.
The oil outlet 7 of the fuel filter is located either at the top of the housing 1 of the fuel filter as shown in fig. 3 and 4 or at the bottom of the housing 1 of the fuel filter as shown in fig. 1 and 2.
The top end of the air inlet pipe 12 is higher than the monitoring liquid level of the liquid level sensor 10, so that the air pumping electric pump 11 can pump air.
The utility model also discloses a fuel supply system using the fuel filter with the air detection function, which comprises a fuel tank 6, the fuel filter with the air detection function and an engine 9, wherein the fuel tank 6 is connected with the cavity 4 between the filter element 2 and the inner wall of the shell 1 through a fuel supply pipe 14; an oil pumping electric pump is arranged in the engine 9 (the existing technology is that the oil pumping electric pump is arranged in the engine 9, and the oil pumping electric pump is not shown in the figure), the oil pumping electric pump is connected with the oil inlet pipe 8, and the oil inlet pipe 8 is communicated with an oil outlet 7 of the fuel filter; when the engine works, the electric pump for oil pumping at the engine 9 is started, negative pressure is generated at the fuel filter, so that fuel oil in the oil tank 6 is sent to the fuel filter under the action of the negative pressure, and the filtered fuel oil enters the engine 9 through the oil inlet pipe 8. The engine 9 is connected with an oil return pipe 5, and the oil return pipe 5 is connected with an oil tank 6. When in operation, redundant fuel oil in the engine 9 flows back to the fuel tank 6 through the oil return pipe 5 under the action of pressure.
The utility model also discloses a degassing method of using above-mentioned fuel supply system, in the normal course of operation of motor vehicle, electric control unit continuously receives the liquid level signal that level sensor 10 detected, when the time that can't detect the liquid level signal in monitoring liquid level department lasts more than 0.5 seconds, electric control unit control is bled and is opened with electric pump 11, take out and pressurize the gas in cavity 4 between filter core 2 and the casing 1 inner wall of fuel filter and send to engine 9 or oil tank 6; the electric pump 11 for air suction is an inverter pump, and the operating frequency of the electric pump 11 for air suction when the gas is sent to the engine 9 is higher than the operating frequency of the electric pump 11 for air suction when the gas is sent to the oil tank 6. The function of starting the electric pump 11 for air suction after 0.5 second delay can be realized by a delay circuit of the electric control device or a delay switch of the electric control device. The delay circuit and the delay switch are both in the prior art, and detailed description is omitted.
Of course, as an alternative technical solution, the electric control device may not be provided with a delay circuit or a delay switch, and the electric pump 11 for pumping air is immediately turned on after the liquid level signal is not detected at the monitored liquid level.
During normal operation of the motor vehicle, when a large amount of gas is generated in the fuel filter, the liquid level sensor 10 will not detect the liquid level, which means that the oil level is lower than the monitored liquid level of the liquid level sensor 10, meaning that the monitored liquid level is filled with air. Since the liquid level sensor 10 cannot detect the liquid level temporarily even when the motor vehicle is shaken, it is necessary to delay the time by 0.5 second or more to confirm that the liquid cannot be detected due to other factors such as shaking and then turn on the electric pump 11 for air suction.
The electric pump 11 for air exhaust is started when the time that the liquid level signal cannot be detected at the monitoring liquid level position lasts for more than 0.5 second, so that the situation that the liquid level signal cannot be detected at the monitoring liquid level position due to other factors such as motor vehicle shaking can be avoided, and more accurate degassing operation is performed. The gas is pumped out and pressurized by the electric pump 11 for air pumping, and the pressure when the gas is sent to the engine 9 is higher than the pressure when the gas is sent to the oil tank 6, so that more gas can be dissolved into the fuel oil in the oil inlet pipe 8 again when the gas is sent to the engine 9, and the negative pressure caused by the electric pump for oil pumping in the oil circuit when the engine 9 is started is influenced, and the gas is precipitated. Meanwhile, the increased pressure for the gas when the gas is sent to the tank 6 is low, and energy is not wasted excessively while the gas is ensured to flow back to the tank 6.
Example one
In the present embodiment, as shown in fig. 1, the outlet pipe 13 is communicated with the oil inlet pipe 8 and the oil outlet 7 of the fuel filter is located at the bottom of the housing 1 of the fuel filter.
Example two
In the embodiment, as shown in fig. 2, the air outlet pipe 13 is communicated with the oil return pipe 5, and the oil outlet 7 of the fuel filter is positioned at the bottom of the housing 1 of the fuel filter.
EXAMPLE III
In the present embodiment, as shown in fig. 3, the outlet pipe 13 is communicated with the oil inlet pipe 8 and the oil outlet 7 of the fuel filter is positioned at the top of the housing 1 of the fuel filter.
Example four
In the present embodiment, as shown in fig. 4, the air outlet pipe 13 is communicated with the oil return pipe 5 and the oil outlet 7 of the fuel filter is positioned at the top of the housing 1 of the fuel filter.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (3)
1. The fuel filter with the air detection function comprises a shell, wherein a filter element is arranged in the shell, the filter element is provided with a central tube, a cavity for containing fuel supplied by a fuel tank is formed between the filter element and the inner wall of the shell, and an engine of a motor vehicle is connected with the fuel tank through an oil return tube;
the outlet of the central pipe is used as an oil outlet of the fuel filter or is communicated with the oil outlet of the fuel filter; the oil outlet of the fuel filter is connected with an engine of a motor vehicle through an oil inlet pipe; the method is characterized in that:
the top of cavity is equipped with level sensor, and level sensor is connected with electrically controlled device, and electrically controlled device is connected with the electric pump for bleeding, and the electric pump for bleeding is connected with intake pipe and outlet duct, and the intake pipe lets in the top of cavity and intake pipe top are higher than level sensor's monitoring liquid level, and the outlet duct communicates with each other or communicates with each other with advancing oil pipe with returning oil pipe.
2. The fuel filter with an air detection function according to claim 1, wherein: the oil outlet of the fuel filter is positioned at the top of the shell of the fuel filter or at the bottom of the shell of the fuel filter.
3. A fuel supply system using the fuel filter with an air detection function according to claim 1 or 2, characterized in that: the fuel tank is connected with a cavity between the filter element and the inner wall of the shell through a fuel supply pipe; the engine is internally provided with an electric pump for oil pumping, the electric pump for oil pumping is connected with the oil inlet pipe, and the oil inlet pipe is communicated with an oil outlet of the fuel filter; the engine is connected with an oil return pipe, and the oil return pipe is connected with an oil tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020919179.1U CN212389456U (en) | 2020-05-27 | 2020-05-27 | Fuel filter with air detection function and fuel supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020919179.1U CN212389456U (en) | 2020-05-27 | 2020-05-27 | Fuel filter with air detection function and fuel supply system |
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| CN212389456U true CN212389456U (en) | 2021-01-22 |
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| CN202020919179.1U Active CN212389456U (en) | 2020-05-27 | 2020-05-27 | Fuel filter with air detection function and fuel supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550338A (en) * | 2020-05-27 | 2020-08-18 | 平原滤清器有限公司 | Fuel filter with air detection function, fuel supply system and degassing method |
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- 2020-05-27 CN CN202020919179.1U patent/CN212389456U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111550338A (en) * | 2020-05-27 | 2020-08-18 | 平原滤清器有限公司 | Fuel filter with air detection function, fuel supply system and degassing method |
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