Self-dedusting air filter system of engine and control method

Abstract

The invention discloses a self-dedusting air filter system of an engine and a control method, belongs to the technical field of engines, and solves the problems that the engine needs to be shut down when an air filter is maintained manually, and the operation cost is high. The self-dedusting air filter system of the engine comprises a first branch pipe, an ECU controller, an air filter A and an air filter B. One end of the first branch pipe is provided with a three-way connector, the other end of the first branch pipe is provided with a supercharger press machine, and the other end, close to the supercharger press machine, of the first branch pipe is provided with a pressure sensor A; a second branch pipe is arranged on one connector of the three-way connector, a third branch pipe is arranged on the other connector of the three-way connector, and the other end of the second branch pipe and the other end of the third branch pipe are communicated with an air outlet of the air filter A and an air outlet of the air filter B respectively. The self-dedusting air filtering system of the engine is free of maintenance for a long time, and the operation cost is reduced. According to the control method of the self-dedusting air filter system of the engine, the self-dedusting cleaning function is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and more specifically, to an engine self-dust removal air filter system and a control method thereof. Background Art

[0002] In unmanned engine power stations, engines often need to run continuously for a long time without stopping. Their consumables such as coolant, lubricating oil, fuel, etc. are automatically replenished by equipment. However, as the running time increases, the air filter is contaminated by particulate impurities and becomes clogged, which not only affects the performance of the engine, but also forces the engine to be shut down for maintenance and replacement after a period of operation, becoming a key factor restricting the continuous operation of the engine.

[0003] The existing engine air filter has a limited dust holding capacity. Under the rated air intake of the engine, the air filter will generally become clogged in 50-100 hours, resulting in excessive negative intake pressure affecting the normal operation of the engine. If the air filter becomes clogged during use, it needs to be manually disassembled and blown and dusted using high pressure, or replaced with a new air filter. The replacement process requires shutting down the engine. In an unmanned engine power station, this undoubtedly shortens the maintenance cycle and increases a lot of operating costs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art. One purpose of the present invention is to provide an engine self-dust removal air filter system, so that unattended engine power stations are free of maintenance and air filter replacement for a long time, thereby reducing operating costs.

[0005] The purpose of the present invention is to provide a control method for an engine self-dust removal air filter system to achieve a self-dust removal and cleaning function.

[0006] In order to achieve the above-mentioned purpose one, the present invention provides an engine self-dust removal air filter system, including a first branch pipe and an ECU controller, an air filter A, and an air filter B. One end of the first branch pipe is provided with a three-way interface, and the other end of the first branch pipe is provided with a supercharger press. The other end of the first branch pipe close to the supercharger press is provided with a pressure sensor A. One of the interfaces of the three-way interface is provided with a second branch pipe, and the other interface of the three-way interface is provided with a third branch pipe. The other ends of the second branch pipe and the third branch pipe are respectively connected to the air outlets of the air filter A and the air filter B, and the air outlets of the air filter A and the air filter B are both connected to the engine. A first electronic cut-off valve is provided on the corresponding pipeline between the air filter A and the engine, and a second electronic cut-off valve is provided on the corresponding pipeline between the air filter B and the engine. The second branch pipe is provided with a third electronic cut-off valve, and the third branch pipe is provided with a fourth electronic cut-off valve. The third electronic cut-off valve, the fourth electronic cut-off valve, the first electronic cut-off valve, the second electronic cut-off valve, the pressure sensor A, and the supercharger press are all electrically connected to the ECU controller.

[0007] As a further improvement, an electronic cut-off valve A and an electronic cut-off valve B are respectively provided at the interfaces where the three-way interface is connected with the second branch pipe and the third branch pipe, and the electronic cut-off valve A and the electronic cut-off valve B are both electrically connected to the ECU controller.

[0008] Furthermore, the electronic shut-off valve A and the electronic shut-off valve B are both electrically controlled butterfly valves.

[0009] Furthermore, a first pressure sensor B is provided on the second branch pipe, and a second pressure sensor B is provided on the third branch pipe. The first pressure sensor B and the second pressure sensor B are respectively located on one side of the air filter A and the air filter B, and the first pressure sensor B and the second pressure sensor B are both electrically connected to the ECU controller.

[0010] In order to achieve the above-mentioned second objective, the present invention provides a control method for an engine self-dust removal air filter system, comprising the following steps:

[0011] S1: The ECU controller controls the electronic cut-off valve A and the electronic cut-off valve B to be closed and in a normally closed state, the third electronic cut-off valve and the fourth electronic cut-off valve to be closed and in a normally closed state, the first electronic cut-off valve to be opened and in a normally open state, and the second electronic cut-off valve to be closed and in a normally closed state;

[0012] S2: The first pressure sensor B detects that the outlet pressure of the air filter A is lower than -5kPa and feeds back to the ECU controller, which controls the second electronic cut-off valve to open and be in a normally open state, and controls the first electronic cut-off valve to close and be in a normally closed state;

[0013] S3: The ECU controller controls the supercharger press to start, and the pressure sensor A detects that the outlet pressure of the supercharger press is greater than 100 kPa and feeds back to the ECU controller. The ECU controller controls the electronic cut-off valve A to open and be in a normally open state, and at the same time controls the third electronic cut-off valve to open, and uses the airflow generated by the supercharger press to purge the air filter A;

[0014] S4: The ECU controller controls the supercharger press to shut down, the electronic cut-off valve A is closed and in a normally closed state, and the third electronic cut-off valve is closed and in a normally closed state;

[0015] S5: The second pressure sensor B detects that the outlet pressure of the air filter B is lower than -5 kPa and feeds back to the ECU controller, which controls the first electronic cut-off valve to open and be in a normally open state, and controls the second electronic cut-off valve to close and be in a normally closed state;

[0016] S6: The ECU controller controls the supercharger press to start, and the pressure sensor A detects that the outlet pressure of the supercharger press is greater than 100 kPa and feeds back to the ECU controller. The ECU controller controls the electronic cut-off valve B to open and be in a normally open state, and at the same time controls the fourth electronic cut-off valve to open, and uses the airflow generated by the supercharger press to purge the air filter B;

[0017] S7: Repeat step S1.

[0018] As a further improvement, the step S3 includes the following specific steps:

[0019] S3.1: ECU controller controls the supercharger press to start;

[0020] S3.2: Pressure sensor A detects that the outlet pressure of the supercharger press is greater than 100 kPa and feeds back to the ECU controller;

[0021] S3.3: The ECU controller controls the electronic cut-off valve A to open and be in the normally open state, and at the same time controls the third electronic cut-off valve to open and close repeatedly, using pulse airflow to purge the air filter B;

[0022] The step S6 includes the following specific steps:

[0023] S6.1: ECU controller controls the supercharger press to start;

[0024] S6.2: Pressure sensor A detects that the outlet pressure of the supercharger press is greater than 100 kPa and feeds back to the ECU controller;

[0025] S6.3: The ECU controller controls the electronic shut-off valve B to open and be in the normally open state, and at the same time controls the fourth electronic shut-off valve to open and close repeatedly, using pulse airflow to purge air filter B.

[0026] Furthermore, the step S3.3 includes the following specific steps:

[0027] S3.3.1: The ECU controller controls the third electronic shut-off valve to open, and the opening duration is t1;

[0028] S3.3.2: The ECU controller controls the third electronic shut-off valve to close, and the closing duration is t2;

[0029] S3.3.3: Repeat step S3.3.1 until the purge time T is reached;

[0030] The step S6.3 includes the following specific steps:

[0031] S6.3.1: The ECU controller controls the fourth electronic shut-off valve to open, and the opening duration is t1;

[0032] S6.3.2: The ECU controller controls the fourth electronic shut-off valve to close, and the closing duration is t2;

[0033] S6.3.3: Repeat step S6.3.1 until the purge time T is reached.

[0034] Furthermore, the opening duration t1 and the closing duration t2 are both 0.5 to 1 second, and the purge time T is 30 to 40 seconds.

[0035] Beneficial Effects

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] An engine self-dust removal air filter system and control method of the present invention quickly opens and closes a third electronic shut-off valve or a fourth electronic shut-off valve at a certain frequency, so that pressurized air enters the air filter in a pulsed state. The air filter is swept by the pulsed airflow to sweep away dust on its outer surface, thereby continuously circulating and realizing the self-cleaning function of the engine air filter during long-term unattended maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0039] Figure 2 It is a schematic flow chart of the control method of the present invention.

[0040] Among them: 1-first branch pipe, 2-second branch pipe, 3-third branch pipe, 4-three-way interface, 5-air filter A, 6-air filter B, 7-third electronic cut-off valve, 8-fourth electronic cut-off valve, 9-pressure sensor A, 10-first pressure sensor B, 11-electronic cut-off valve A, 12-electronic cut-off valve B, 13-supercharger press, 14-second pressure sensor B, 15-ECU controller. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0042] See also Figure 1-2 , an engine self-dust removal air filter system, comprising a first branch pipe 1 and an ECU controller 15, an air filter A5, and an air filter B6, one end of the first branch pipe 1 is provided with a three-way interface 4, the other end of the first branch pipe 1 is provided with a supercharger press 13, the other end of the first branch pipe 1 close to the supercharger press 13 is provided with a pressure sensor A9, one of the interfaces of the three-way interface 4 is provided with a second branch pipe 2, and the other interface of the three-way interface 4 is provided with a third branch pipe 3, the other ends of the second branch pipe 2 and the third branch pipe 3 are respectively connected with the air outlets of the air filter A5 and the air filter B6, the air outlets of the air filter A5 and the air filter B6 are both connected with the engine, a first electronic cut-off valve is provided on the corresponding pipeline between the air filter A5 and the engine, a second electronic cut-off valve is provided on the corresponding pipeline between the air filter B6 and the engine, a third electronic cut-off valve 7 is provided on the second branch pipe 2, a fourth electronic cut-off valve 8 is provided on the third branch pipe 3, the third electronic cut-off valve 7, the fourth electronic cut-off valve 8, the first electronic cut-off valve, the second electronic cut-off valve, the pressure sensor A9, and the supercharger pressure The air filter 13 is electrically connected to the ECU controller 15; during the operation of the engine, the electronic shut-off valve A11 is in a normally open state, the electronic shut-off valve B12 is in a closed state, the third electronic shut-off valve 7 and the electronic purge valve 8 are both in a normally open state, the air filter A4 is in a working state, and the air filter B5 is in a standby state. When the pressure sensor B10 corresponding to one side of the air filter A4 detects that the intake pressure is less than -5kPa, the ECU controller 15 determines that the air filter A5 is blocked, and the ECU controller 15 controls the electronic shut-off valve A11 to close, the electronic shut-off valve B12 to open, and the air filter B6 to work. When the pressure sensor A9 detects that the outlet pressure of the supercharger compressor 13 is greater than 100kPa, the ECU controller 15 controls the third electronic shut-off valve 7 to open and close quickly, so that the pressurized air enters the air filter A5 in a pulsed state. The air filter A5 is subjected to the pulsed airflow, and the dust attached to the outer surface of the air filter A5 is blown off, so that the continuous cycle is realized to realize the self-cleaning function of the engine air filter for long-term unattended maintenance.

[0043] In this embodiment, an electronic shut-off valve A11 and an electronic shut-off valve B12 are respectively provided at the interfaces where the three-way interface 4 is connected with the second branch pipe 2 and the third branch pipe 3. The electronic shut-off valve A11 and the electronic shut-off valve B12 are both electrically connected to the ECU controller 15, and the electronic shut-off valve A11 and the electronic shut-off valve B12 are both electrically controlled butterfly valves. When it is necessary to remove the air filter A5 or the air filter B6 for repair and maintenance, the electronic shut-off valve A11 or the electronic shut-off valve B12 corresponding to the air filter A5 or the air filter B6 can be closed, and then the second branch pipe 2 or the third branch pipe 3 can be removed, thereby facilitating the removal of the air filter A5 or the air filter B6 for repair and maintenance, and will not affect the normal operation of the engine in a short time.

[0044] In this embodiment, a first pressure sensor B10 is provided on the second branch pipe 2, and a second pressure sensor B14 is provided on the third branch pipe 3. The first pressure sensor B10 and the second pressure sensor B14 are respectively located on one side of the air filter A5 and the air filter B6, and the first pressure sensor B10 and the second pressure sensor B14 are electrically connected to the ECU controller 15, and can monitor the pressure of the air outlet of the air filter A5 or the air filter B6 in real time, so as to determine whether the air filter A5 or the air filter B6 is blocked, and switch in time according to the blockage condition of the air filter A5 or the air filter B6, so as to ensure the stable operation of the engine.

[0045] A control method for an engine self-dust removal air filter system comprises the following steps:

[0046] S1: The ECU controller 15 controls the electronic cut-off valve A11 and the electronic cut-off valve B12 to be closed and in a normally closed state, the third electronic cut-off valve 7 and the fourth electronic cut-off valve 8 to be closed and in a normally closed state, the first electronic cut-off valve to be opened and in a normally open state, and the second electronic cut-off valve to be closed and in a normally closed state; at this time, the engine uses the air filter A5 to filter the air;

[0047] S2: The first pressure sensor B10 detects that the outlet pressure of the air filter A5 is lower than -5 kPa and feeds back to the ECU controller 15. The ECU controller 15 controls the second electronic cut-off valve to open and be in a normally open state, and controls the first electronic cut-off valve to close and be in a normally closed state. At this time, the first pressure sensor B10 detects that the pressure at the outlet of the air filter A5 is too low, and determines that the air filter A5 is blocked. At this time, the air filter B6 is switched to filter the air.

[0048] S3: The ECU controller 15 controls the supercharger press 13 to start, the pressure sensor A9 detects that the outlet pressure of the supercharger press 13 is greater than 100 kPa and feeds back to the ECU controller 15, the ECU controller 15 controls the electronic shut-off valve A11 to open and be in a normally open state, and at the same time controls the third electronic shut-off valve 7 to open, and uses the airflow generated by the supercharger press 13 to purge the air filter A5; by repeatedly opening and closing the third electronic shut-off valve 7, the airflow blown by the supercharger press 13 to the air filter A5 is in a pulsed state to purge the air filter A5.

[0049] S4: The ECU controller 15 controls the supercharger press 13 to stop, the electronic cut-off valve A11 is closed and in a normally closed state, and the third electronic cut-off valve 7 is closed and in a normally closed state;

[0050] S5: The second pressure sensor B14 detects that the outlet pressure of the air filter B6 is lower than -5 kPa and feeds back to the ECU controller 15. The ECU controller 15 controls the first electronic cut-off valve to open and be in a normally open state, and controls the second electronic cut-off valve to close and be in a normally closed state. At this time, the second pressure sensor B14 detects that the pressure at the outlet of the air filter B6 is too low, and determines that the air filter B6 is blocked. At this time, the air filter A5 is switched to filter the air.

[0051] S6: The ECU controller 15 controls the supercharger press 13 to start, and the pressure sensor A9 detects that the outlet pressure of the supercharger press 13 is greater than 100 kPa and feeds back to the ECU controller 15. The ECU controller 15 controls the electronic cut-off valve B12 to open and be in a normally open state, and at the same time controls the fourth electronic cut-off valve 8 to open, and uses the airflow generated by the supercharger press 13 to purge the air filter B6; by repeatedly opening and closing the fourth electronic cut-off valve 8, the airflow from the supercharger press 13 to the air filter B6 is in a pulsed state to purge the air filter B6;

[0052] S7: Repeat step S1.

[0053] In this embodiment, step S3 includes the following specific steps:

[0054] S3.1: The ECU controller 15 controls the supercharger press 13 to start;

[0055] S3.2: The pressure sensor A9 detects that the outlet pressure of the supercharger press 13 is greater than 100 kPa and feeds back to the ECU controller 15;

[0056] S3.3: The ECU controller 15 controls the electronic cut-off valve A11 to open and be in a normally open state, and at the same time controls the third electronic cut-off valve 7 to repeatedly open and close, using the pulse airflow to purge the air filter A5;

[0057] The step S6 includes the following specific steps:

[0058] S6.1: The ECU controller 15 controls the supercharger press 13 to start;

[0059] S6.2: The pressure sensor A9 detects that the outlet pressure of the supercharger press 13 is greater than 100 kPa and feeds back to the ECU controller 15;

[0060] S6.3: The ECU controller 15 controls the electronic shut-off valve B12 to open and be in a normally open state, and at the same time controls the fourth electronic shut-off valve 8 to open and close repeatedly, using the pulse airflow to purge the air filter B6.

[0061] In this embodiment, step S3.3 includes the following specific steps:

[0062] S3.3.1: The ECU controller 15 controls the third electronic shut-off valve 7 to open, and the opening duration is t1;

[0063] S3.3.2: The ECU controller 15 controls the third electronic shut-off valve 7 to close, and the closing duration is t2;

[0064] S3.3.3: Repeat step S3.3.1 until the purge time T is reached;

[0065] Step S6.3 includes the following specific steps:

[0066] S6.3.1: The ECU controller 15 controls the fourth electronic shut-off valve 8 to open, and the opening duration is t1;

[0067] S6.3.2: The ECU controller 15 controls the fourth electronic shut-off valve 8 to close, and the closing duration is t2;

[0068] S6.3.3: Repeat step S6.3.1 until the purge time T is reached.

[0069] In this embodiment, the opening duration t1 and the closing duration t2 are both 0.5 to 1 second, and the purge time T is 30 to 40 seconds.

[0070] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An engine self-dust removal air filter system, characterized in that: The invention comprises a first branch pipe (1), an ECU controller (15), an air filter A (5), and an air filter B (6); one end of the first branch pipe (1) is provided with a three-way interface (4); the other end of the first branch pipe (1) is provided with a supercharger press (13); the other end of the first branch pipe (1) close to the supercharger press (13) is provided with a pressure sensor A (9); one of the interfaces of the three-way interface (4) is provided with a second branch pipe (2); the other interface of the three-way interface (4) is provided with a third branch pipe (3); the other ends of the second branch pipe (2) and the third branch pipe (3) are connected to the air outlets of the air filter A (5) and the air filter B (6) respectively. The air outlets of the air filter A (5) and the air filter B (6) are both connected to the engine, a first electronic shut-off valve is provided on the corresponding pipeline between the air filter A (5) and the engine, a second electronic shut-off valve is provided on the corresponding pipeline between the air filter B (6) and the engine, a third electronic shut-off valve (7) is provided on the second branch pipe (2), a fourth electronic shut-off valve (8) is provided on the third branch pipe (3), and the third electronic shut-off valve (7), the fourth electronic shut-off valve (8), the first electronic shut-off valve, the second electronic shut-off valve, the pressure sensor A (9), and the supercharger press (13) are all electrically connected to the ECU controller (15).

2. The engine self-dust removal air filter system according to claim 1, characterized in that: An electronic cut-off valve A (11) and an electronic cut-off valve B (12) are respectively provided at the interfaces where the three-way interface (4) is connected to the second branch pipe (2) and the third branch pipe (3), and the electronic cut-off valve A (11) and the electronic cut-off valve B (12) are both electrically connected to the ECU controller (15).

3. The engine self-dust removal air filter system according to claim 2, characterized in that: The electronic shut-off valve A (11) and the electronic shut-off valve B (12) are both electrically controlled butterfly valves.

4. The engine self-dust removal air filter system according to claim 2, characterized in that: The second branch pipe (2) is provided with a first pressure sensor B (10), and the third branch pipe (3) is provided with a second pressure sensor B (14). The first pressure sensor B (10) and the second pressure sensor B (14) are respectively located on one side of the air filter A (5) and the air filter B (6), and the first pressure sensor B (10) and the second pressure sensor B (14) are both electrically connected to the ECU controller (15).

5. A control method using the engine self-dust removal air filter system according to claim 4, characterized in that: The steps include: S1: The ECU controller (15) controls the electronic cut-off valve A (11) and the electronic cut-off valve B (12) to be closed and in a normally closed state, the third electronic cut-off valve (7) and the fourth electronic cut-off valve (8) to be closed and in a normally closed state, the first electronic cut-off valve to be opened and in a normally open state, and the second electronic cut-off valve to be closed and in a normally closed state; S2: The first pressure sensor B (10) detects that the outlet pressure of the air filter A (5) is lower than -5 kPa and feeds back to the ECU controller (15), and the ECU controller (15) controls the second electronic cut-off valve to open and be in a normally open state, and controls the first electronic cut-off valve to close and be in a normally closed state; S3: The ECU controller (15) controls the supercharger press (13) to start, the pressure sensor A (9) detects that the outlet pressure of the supercharger press (13) is greater than 100 kPa and feeds back to the ECU controller (15), the ECU controller (15) controls the electronic cut-off valve A (11) to open and be in a normally open state, and at the same time controls the third electronic cut-off valve (7) to open, and uses the airflow generated by the supercharger press (13) to purge the air filter A (5); S4: the ECU controller (15) controls the supercharger press (13) to stop, the electronic cut-off valve A (11) is closed and in a normally closed state, and the third electronic cut-off valve (7) is closed and in a normally closed state; S5: The second pressure sensor B (14) detects that the outlet pressure of the air filter B (6) is lower than -5 kPa and feeds back to the ECU controller (15), and the ECU controller (15) controls the first electronic cut-off valve to open and be in a normally open state, and controls the second electronic cut-off valve to close and be in a normally closed state; S6: The ECU controller (15) controls the supercharger press (13) to start, the pressure sensor A (9) detects that the outlet pressure of the supercharger press (13) is greater than 100 kPa and feeds back to the ECU controller (15), the ECU controller (15) controls the electronic cut-off valve B (12) to open and be in a normally open state, and at the same time controls the fourth electronic cut-off valve (8) to open, and uses the airflow generated by the supercharger press (13) to purge the air filter B (6); S7: Repeat step S1.

6. The control method of an engine self-dust removal air filter system according to claim 5, characterized in that: The step S3 comprises the following specific steps: S3.1: The ECU controller (15) controls the supercharger press (13) to start; S3.2: The pressure sensor A (9) detects that the outlet pressure of the supercharger press (13) is greater than 100 kPa and feeds back to the ECU controller (15); S3.3: The ECU controller (15) controls the electronic shut-off valve A (11) to open and be in a normally open state, and at the same time controls the third electronic shut-off valve (7) to repeatedly open and close, and uses a pulse airflow to purge the air filter A (5); The step S6 comprises the following specific steps: S6.1: The ECU controller (15) controls the supercharger press (13) to start; S6.2: The pressure sensor A (9) detects that the outlet pressure of the supercharger press (13) is greater than 100 kPa and feeds back to the ECU controller (15); S6.3: The ECU controller (15) controls the electronic shut-off valve B (12) to open and be in a normally open state, and at the same time controls the fourth electronic shut-off valve (8) to open and close repeatedly, thereby using the pulse airflow to purge the air filter B (6).

7. The control method of an engine self-dust removal air filter system according to claim 6, characterized in that: The step S3.3 includes the following specific steps: S3.3.1: The ECU controller (15) controls the third electronic shut-off valve (7) to open, and the opening duration is t1; S3.3.2: The ECU controller (15) controls the third electronic shut-off valve (7) to close, and the closing duration is t2; S3.3.3: Repeat step S3.3.1 until the purge time T is reached; The step S6.3 includes the following specific steps: S6.3.1: The ECU controller (15) controls the fourth electronic shut-off valve (8) to open, and the opening duration is t1; S6.3.2: The ECU controller (15) controls the fourth electronic shut-off valve (8) to close, and the closing duration is t2; S6.3.3: Repeat step S6.3.1 until the purge time T is reached.

8. The control method of the engine self-dust removal air filter system according to claim 7, characterized in that: The opening duration t1 and the closing duration t2 are both 0.5 to 1 second, and the purge time T is 30 to 40 seconds.

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