Engine intake air filtering device and method

Abstract

The invention discloses an engine inlet air filtering device and method, and belongs to the technical field of filtering devices.The engine inlet air filtering device comprises a shell, a vertical air inlet channel is formed in the shell, the upper end of the air inlet channel extends out of the shell to be communicated with outside air, a filter screen is installed between the outer side of the air inlet channel and the shell, and a control motor is fixedly connected to one outer side of the air inlet channel; a transmission shaft of the control motor penetrates through the side wall of the air inlet channel and is connected with blades, and an exhaust port is formed in the position, above the filter screen, of the shell. The control motor is in communication connection with the vehicle control unit, an air inlet resistance sensor is installed on the air inlet channel, and the air inlet resistance sensor is in communication connection with the vehicle control unit. The air filter has the advantages that the air filtering efficiency is improved when the air inlet flow is low, and the service life of an engine is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering devices, and in particular to an engine air intake filtering device and method. Background Art

[0002] The oil bath air filter is used to provide clean air to the engine, which can remove about 90% of particulate matter in the air and protect the engine's combustion-related components. The oil bath air filter contains filter oil and a metal filter. When the engine is started, air enters the oil bath air filter from the air intake. The air comes into contact with the filter oil through the central intake duct. After the oil absorbs the dust particles in the air, the air containing the oil flows along the drainage duct to the air outlet and randomly enters the engine. The metal filter is arranged in the drainage duct to absorb the oil in the air, so the air passing through the metal filter is clean air without oil. However, when the intake flow rate is small, there is a problem of less contact between the air and the filter oil, resulting in low filtration efficiency.

[0003] In the prior art, air enters the oil bath air filter from the air inlet, and then comes into contact with the filter oil through the intake duct. The oil absorbs the dust particles in the air, and then the air containing the oil and a small amount of dust flows along the drainage duct to the engine. The metal filter is arranged in the drainage duct, which absorbs most of the oil in the air. Therefore, the air passing through the metal filter is clean air without oil.

[0004] Since the air flow required for idle speed and maximum speed is different when the engine is working, the current technical solution is to ensure that the intake resistance of the engine does not exceed the limit when the intake volume is high. When the intake flow is small, the contact between the air flow and the oil is not sufficient, resulting in reduced filtration efficiency. Summary of the Invention

[0005] The present invention aims to solve the technical problems mentioned in the above background technology. In the first aspect, an engine air intake filter device is provided, which can conveniently control the intake air flow rate and provide an equipment basis for the method provided in the second aspect.

[0006] The second aspect provides a method applied to the engine air intake filter device provided in the first aspect, so that the device can adjust the opening and closing angle of the control blade according to the current engine operating conditions to better control the intake air flow rate.

[0007] According to a first aspect of the present invention, the present invention provides a technical solution as follows: an engine air intake filter device, comprising a housing, a vertical air intake duct provided within the housing, an upper end of the air intake duct extending out of the housing to communicate with outside air, a filter screen installed between an outer side of the air intake duct and the housing, a control motor fixedly connected to an outer side of the air intake duct, a drive shaft of the control motor extending through a side wall of the air intake duct and connected to a blade, and an exhaust port provided on the housing above the filter screen;

[0008] The control motor is connected to the vehicle controller for communication. An intake resistance sensor is installed on the intake duct, and the intake resistance sensor is connected to the vehicle controller for communication.

[0009] In some embodiments, the lower end of the air inlet duct is disposed in the housing, and filtered oil is disposed at the bottom of the housing. The lower end of the air inlet duct is positioned higher than the liquid level of the filtered oil.

[0010] In some embodiments, the shape of the blade is the same as the inner diameter of the air inlet duct. When the blade is placed horizontally, it blocks the air inlet duct. The control motor controls the rotation of the blade, thereby controlling the opening angle between the blade and the air inlet duct.

[0011] In some embodiments, the control motor is installed at a height higher than the filter.

[0012] In some embodiments, a sealing structure is provided between the transmission shaft of the control motor and the air intake duct.

[0013] In some embodiments, the sealing structure is a sealing ring.

[0014] In some embodiments, the vehicle controller is communicatively connected to the engine ECU.

[0015] According to the second aspect of the present invention, the technical solution provided by the present invention is: a method applied to the engine air intake filter device of the first aspect, comprising the following steps:

[0016] S1. The vehicle controller collects SPN132 data, engine intake temperature, engine exhaust temperature and current intake resistance data;

[0017] S2. Calculate the current intake air flow rate, and then calculate the air flow rate in the intake duct based on the current intake duct diameter;

[0018] S3. Determine the difference between the current input intake resistance and the standard value. If the current intake resistance is greater than the standard value and the blade angle is 90°, an alarm of "intake resistance too high" is issued. The staff resets the device and then proceeds to step S1.

[0019] When the front air flow resistance is greater than the standard value and the blade angle is not equal to 90°, the control motor is adjusted to correct the opening angle of the blade, and then step S1 is performed;

[0020] When the front air flow resistance is less than the standard value, proceed to the next step;

[0021] S4, judging the difference between the current exhaust temperature and the standard value. If the current exhaust temperature is less than the standard value, adjusting the control motor to correct the opening angle of the blades, and then proceeding to step S1;

[0022] When the current exhaust temperature is greater than the standard value, the control motor is adjusted to correct the opening angle of the blade, and then step S1 is performed.

[0023] Furthermore, S2, the current intake flow rate is calculated, and then the flow rate of the air in the intake duct is calculated according to the current diameter of the intake duct;

[0024] The data read by SPN132 is the air mass M, in kg / min;

[0025] Assume that the air mass is M, the air flow is Q, the air density is ρ, the drainage channel cross-sectional area is A, the air velocity is V, the current air temperature is T, and the air density ρ=1.225*288.15 / (T+288.15);

[0026] Then the air volume flow rate Q=M / p;

[0027] The air flow rate in the drainage channel is V=Q / A.

[0028] Furthermore, the calculation of adjusting the control motor to correct the blade opening angle is as follows:

[0029] Assume the initial blade position, the pipe cross-sectional area is A1, the corresponding air flow rate is V1, the adjusted cross-sectional area is A2, the corresponding air flow rate is V2, and the adjusted blade angle is Y.

[0030] Then the adjusted air flow rate V2=A1*V1 / A2;

[0031] The relationship between area A2 and blade angle Y is A2=A1* Y.

[0032] The advantages of the present invention over the prior art are that the opening and closing angles of the blades are electronically controlled, thereby ensuring the air filtering efficiency when the intake flow is low and improving the service life of the engine.

[0033] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 2 is a vertical cross-sectional view of an engine air intake filter device according to an embodiment of the present invention when the blades are fully opened;

[0035] Figure 2 yes Figure 1 The vertical cross-sectional view of the engine air intake filter device with the blades fully closed is shown;

[0036] Figure 3 yes Figure 1 The schematic diagram of the casing shown is a top view with the blades inside half open;

[0037] Figure 4 yes Figure 1 The schematic diagram of the main view of the blade part shown;

[0038] Figure 5 yes Figure 4 The schematic diagram of the blade part shown is a top view;

[0039] Figure 6 yes Figure 3 Schematic diagram of the control motor part shown;

[0040] Figure 7 is a schematic diagram of electrical connections of a control motor according to an embodiment of the present invention;

[0041] Figure 8 1. It is a flow chart of a control method of an engine air intake filter device according to an embodiment of the present invention;

[0042] In the attached figure: 1. Inlet duct; 2. Exhaust port; 3. Blades; 4. Filter; 5. Filtered oil; 6. Control motor; 7. Housing. DETAILED DESCRIPTION

[0043] The present invention is described in further detail below.

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0045] Combine Figure 1 、 Figure 2 As shown, a vertical air intake duct 1 is provided in a housing 7 of an engine air intake filter device. The upper end of the air intake duct 1 extends out of the housing 7 and communicates with the outside air. The lower end of the air intake duct 1 is provided in the housing 7. A filtered oil 5 is provided at the bottom of the housing 7. The lower end of the air intake duct 1 is located above the liquid level of the filtered oil 5.

[0046] A filter 4 is installed between the outer peripheral side of the air inlet duct 1 and the housing 7;

[0047] An exhaust port 2 is provided on the housing 7 above the filter 4 .

[0048] Combine Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 As shown, a control motor 6 is fixedly connected to an outer side of the air intake duct 1 above the filter 4. The drive shaft of the control motor 6 passes through the side wall of the air intake duct 1 and is connected to a blade 3. The shape of the blade 3 is the same as the inner diameter of the air intake duct 1. When the blade 3 is placed horizontally, the air intake duct 1 is blocked. The control motor 6 controls the rotation of the blade 3, thereby controlling the opening angle between the blade 3 and the air intake duct 1.

[0049] Combine Figure 7 As shown, the control motor 6 is connected to the vehicle controller for communication, an intake resistance sensor is installed on the intake duct 1, the intake resistance sensor is connected to the vehicle controller for communication, and the vehicle controller is connected to the engine ECU for communication.

[0050] Combine Figure 8 As shown, the control method of the engine air intake filter device includes the following steps:

[0051] S1, the vehicle controller collects SPN132 data, engine intake temperature, engine exhaust temperature T exhaust And the current intake resistance data R in ;

[0052] S2. Calculate the current intake air flow rate Q, and then calculate the air flow velocity V in the intake duct 1 based on the current diameter of the intake duct 1;

[0053] The data read by SPN132 is the air mass M, in kg / min;

[0054] Assume that the air mass is M, the air flow is Q, the air density is ρ, the drainage channel cross-sectional area is A, the air velocity is V, the current air temperature is T, and the air density ρ=1.225*288.15 / (T+288.15);

[0055] Then the air volume flow rate Q=M / p;

[0056] The air flow rate in the drainage channel is V=Q / A.

[0057] S3. Determine the current input intake resistance R in and the standard value of intake resistance R limit When the current intake resistance is greater than the standard value of intake resistance and the angle of blade 3 is 90°, an alarm of "intake resistance too high" is issued, and the staff resets the equipment and proceeds to step S1;

[0058] When the front air intake resistance is greater than the standard value of the air intake resistance and the angle of the blade 3 is not equal to 90°, the control motor 6 is adjusted to reduce the opening angle of the blade 3, and then step S1 is performed;

[0059] When the front air intake resistance is less than the standard value of the air intake resistance, proceed to the next step;

[0060] S4. Determine the current exhaust temperature T exhaust and exhaust temperature standard value T 0(exhaust) When the current exhaust temperature is lower than the exhaust temperature standard value, the control motor 6 is adjusted to reduce the opening angle of the blade 3, and then step S1 is performed;

[0061] When the current exhaust temperature is greater than the exhaust temperature standard value, the control motor 6 is adjusted to increase the opening angle of the blade 3, and then step S1 is performed.

[0062] The calculation for adjusting the control motor 6 to reduce / increase the opening angle of the blade 3 is as follows:

[0063] Assume that the initial blade 3 position, the pipe cross-sectional area is A1, the corresponding air flow rate is V1, the adjusted cross-sectional area is A2, the corresponding air flow rate is V2, and the adjusted blade 3 angle is Y.

[0064] The adjusted air flow rate V2 = A1 * V1 / A2; the relationship between the area A2 and the blade angle Y is A2 = A1 * Y.

[0065] According to the solution described in this embodiment, the present invention uses the real-time intake flow rate and exhaust temperature of the engine as the basis for adjusting the blade angle, changing the intake air flow rate to improve the air filtration efficiency, thereby increasing the engine life.

[0066] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An engine air intake filter device, comprising a housing, characterized in that: A vertical air inlet is provided in the housing, the upper end of the air inlet extends out of the housing and communicates with the outside air, a filter is installed between the outer side of the air inlet and the housing, a control motor is fixedly connected to one outer side of the air inlet, a drive shaft of the control motor passes through the side wall of the air inlet and is connected to a blade, and an exhaust port is provided on the housing above the filter; The control motor is connected to the vehicle controller for communication. An intake resistance sensor is installed on the intake duct, and the intake resistance sensor is connected to the vehicle controller for communication.

2. The engine air intake filter device according to claim 1, characterized in that: The lower end of the air inlet passage is arranged in the shell, and the bottom of the shell is provided with filtered oil. The lower end of the air inlet passage is located higher than the liquid level of the filtered oil.

3. The engine air intake filter device according to claim 1, characterized in that: The outer shape of the blade is the same as the inner diameter of the air inlet duct. When the blade is placed horizontally, the air inlet duct is blocked. The control motor controls the rotation of the blade, thereby controlling the opening angle between the blade and the air inlet duct.

4. The engine air intake filter device according to claim 1, characterized in that: The installation height of the control motor is higher than the filter screen.

5. The engine air intake filter device according to claim 1, characterized in that: A sealing structure is provided between the transmission shaft of the control motor and the air intake duct.

6. The engine air intake filter device according to claim 5, characterized in that: The sealing structure is a sealing ring.

7. The engine air intake filter device according to claim 1, characterized in that: The vehicle controller is in communication connection with the engine ECU.

8. A method, characterized in that The engine air intake filter device according to any one of claims 1 to 7 comprises the following steps: S1. The vehicle controller collects SPN132 data, engine intake temperature, engine exhaust temperature and current intake resistance data; S2. Calculate the current intake air flow rate, and then calculate the air flow rate in the intake duct based on the current intake duct diameter; S3. Determine the difference between the current input intake resistance and the standard value. If the current intake resistance is greater than the standard value and the blade angle is 90°, an "intake resistance too high" alarm is triggered. The operator resets the device and then proceeds to step S1. When the front air flow resistance is greater than the standard value and the blade angle is not equal to 90°, the control motor is adjusted to correct the opening angle of the blade, and then step S1 is performed; When the front air flow resistance is less than the standard value, proceed to the next step; S4, judging the difference between the current exhaust temperature and the standard value. If the current exhaust temperature is less than the standard value, adjusting the control motor to correct the opening angle of the blades, and then proceeding to step S1; When the current exhaust temperature is greater than the standard value, the control motor is adjusted to correct the opening angle of the blade, and then step S1 is performed.

9. The method according to claim 8, characterized in that: S2. Calculate the current intake air flow rate, and then calculate the air flow rate in the intake duct based on the current intake duct diameter; The data read by SPN132 is the air mass M, in kg / min; Assume that the air mass is M, the air flow is Q, the air density is ρ, the drainage channel cross-sectional area is A, the air velocity is V, the current air temperature is T, and the air density ρ=1.225*288.15 / (T+288.15); Then the air volume flow rate Q=M / p; The air flow rate in the drainage channel is V=Q / A.

10. The method according to claim 8, characterized in that: The calculation of the adjustment control motor to correct the opening angle of the blades is as follows: Assume the initial blade position, the pipe cross-sectional area is A1, the corresponding air flow rate is V1, the adjusted cross-sectional area is A2, the corresponding air flow rate is V2, and the adjusted blade angle is Y. Then the adjusted air flow rate V2=A1*V1 / A2; The relationship between area A2 and blade angle Y is A2=A1* Y.

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