Oil filter cleanliness detection device and detection method thereof

Abstract

The oil filter cleanliness detection device comprises an oil pan, an oil filter is fixedly installed on the left side of the oil pan, a main pressure cavity is formed in the left side of the oil pan and located on the right side of the oil filter, a steel plate is fixedly installed on the upper side of the oil pan, and a paper pad is arranged between the oil pan and the steel plate. An oil filter valve body is fixedly installed on the upper side of the steel plate, an oil filter valve element is slidably connected into the oil filter valve body, a pressure detection hole is formed in the upper side of the oil filter valve body, a pressure switch is fixedly installed on the upper side of the pressure detection hole, a spring is fixedly installed on the right side of the oil filter valve element, and an oil filter aluminum pad is fixedly installed on the right side of the oil filter valve body. The left side of the oil filter aluminum pad clings to one end of the spring away from the oil filter valve core. By means of the mode, the oil filter valve element can be pushed to move through the oil pressure difference, an oil way can be in the on-off state, the oil pressure is detected only through the pressure switch, an additional sensor is not needed, and the cleanliness of the automatic gearbox oil filter is judged.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical detection, and in particular to an oil filter cleanliness detection device and a detection method thereof. Background Art

[0002] The hydraulic system of the automatic transmission is one of its core components. The hydraulic system mainly includes oil pump, valve body, solenoid valve and other components. The oil pump is driven by the engine to provide hydraulic energy. The valve body contains multiple valves that control the direction of hydraulic flow. The solenoid valve switches the oil circuit according to the control signal to achieve gear shifting. The oil is the shifting control and lubrication medium of the automatic transmission. Its cleanliness is related to whether the transmission can operate normally. The oil filter filters impurities in the transmission oil, such as metal debris, friction material fibers, seal mixtures and debris generated by gear wear. If the impurities are not filtered, they will accelerate the wear of parts and reduce the service life of the internal parts of the automatic transmission. It may even cause the oil pump, valve body, solenoid valve and other movements to stagnate or get stuck, affecting the performance of the entire vehicle and even bringing safety risks.

[0003] As the oil filter is used for a longer time, its filtering effect will decrease. Replacing only the transmission oil without replacing the oil filter will also affect the service life of the automatic transmission. Therefore, it is necessary to realize automated and precise detection of the cleanliness of the automatic transmission oil filter to accurately determine whether the oil filter has reached the replacement standard, thereby effectively extending the service life of the automatic transmission.

[0004] Based on this, the present invention designs an oil filter cleanliness detection device and a detection method thereof to solve the above problems. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides an oil filter cleanliness detection device and a detection method thereof.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] An oil filter cleanliness detection device comprises an oil pan, an oil filter is fixedly mounted on the left side of the oil pan, a main pressure chamber is arranged on the left side of the oil pan, the main pressure chamber is located on the right side of the oil filter, a steel plate is fixedly mounted on the upper side of the oil pan, a paper pad is arranged between the oil pan and the steel plate, an oil filter valve body is fixedly mounted on the upper side of the steel plate, an oil filter valve core is slidably connected to the oil filter valve body, a pressure detection hole is arranged on the upper side of the oil filter valve body, and a pressure switch is fixedly mounted on the upper side of the pressure detection hole.

[0008] Furthermore, a spring is fixedly installed on the right side of the oil filter valve core.

[0009] Furthermore, an oil filter aluminum pad is fixedly installed on the right side of the oil filter valve body, and the left side of the oil filter aluminum pad is tightly attached to an end of the spring away from the oil filter valve core.

[0010] Furthermore, a baffle is provided on the right side of the oil filter aluminum pad, the baffle is fixedly installed on the right side of the oil filter valve body, and the left side of the baffle is closely attached to the right side of the oil filter aluminum pad.

[0011] Furthermore, a plurality of oil holes are arranged on the steel plate.

[0012] Furthermore, a control chamber is provided in the middle side of the oil pan, and control oil is provided in the control chamber.

[0013] Furthermore, main pressure oil is arranged in the main pressure chamber, and the pressure switch is electrically connected to an external controller.

[0014] In order to better achieve the purpose of the present invention, the present invention also provides a detection method of an oil filter cleanliness detection device, comprising the following steps:

[0015] Step 1: In normal working state, the automatic transmission oil enters the main pressure chamber through the oil pan channel after being filtered by the oil filter, and enters the oil filter valve body through the oil holes on the oil pan paper pad and steel plate. The main pressure oil pressure is greater than the control oil pressure and the return spring force, pushing the oil filter valve core to the right, the oil filter aluminum pad limits the oil filter valve core, and the baffle limits the oil filter aluminum pad. At this time, the control oil enters the pressure difference detection hole on the oil filter valve body through the oil holes on the oil pan paper pad and steel plate. The pressure switch detects the oil pressure, and the pressure switch transmits the electrical signal to the external controller, which confirms that there is no need to replace the oil filter through the external controller;

[0016] Step 2: When the automatic transmission oil filter is in a blocked state, the oil filter cleanliness is poor, impurities increase, and the oil pressure drops when passing through the oil filter. It is not enough to overcome the return spring and the control oil pressure, and cannot push the oil filter valve core to move. The control oil enters the oil filter valve body through the oil pan paper pad and the oil holes on the steel plate. The step of the oil filter valve core blocks the oil from reaching the pressure difference detection hole. At this time, the pressure switch cannot detect the oil pressure, and the pressure switch transmits the electrical signal to the external controller, which confirms the replacement of the oil filter.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention drives the oil filter valve core to move through the oil pressure difference, realizes the oil circuit in two states of on and off, and only uses a pressure switch to detect the oil pressure without additional sensors to judge the cleanliness of the automatic transmission oil filter, thereby solving the problem of automatic transmission oil filter cleanliness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a cross-sectional view of the present invention;

[0020] Figure 2 It is a cross-sectional view of the oil filter valve core of the present invention in two states;

[0021] Figure 3 This is a partial structural cross-sectional view of the present invention with the oil filter and the oil pan removed.

[0022] The numbers in the figure represent:

[0023] 1. Oil filter; 2. Paper pad; 3. Steel plate; 4. Oil filter valve core; 5. Pressure switch; 6. Oil filter valve body; 7. Spring; 8. Oil filter aluminum pad; 9. Baffle; 10. Oil pan; 11. Pressure detection hole; 12. Main pressure chamber; 13. Control chamber; 14. Oil hole. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention will be further described below in conjunction with the embodiments.

[0026] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0027] Embodiment 1: In some embodiments, please refer to Figure 1-Figure 3, an oil filter cleanliness detection device, comprising an oil pan 10, an oil filter 1 is fixedly installed on the left side of the oil pan 10, a main pressure chamber 12 is arranged on the left side of the oil pan 10, and the main pressure chamber 12 is located on the right side of the oil filter 1, a steel plate 3 is fixedly installed on the upper side of the oil pan 10, a paper pad 2 is arranged between the oil pan 10 and the steel plate 3, an oil filter valve body 6 is fixedly installed on the upper side of the steel plate 3, an oil filter valve core 4 is slidably connected in the oil filter valve body 6, a pressure detection hole 11 is arranged on the upper side of the oil filter valve body 6, and a pressure switch 5 is fixedly installed on the upper side of the pressure detection hole 11 for detecting the pressure in the pressure detection hole 11.

[0028] A spring 7 is fixedly mounted on the right side of the oil filter valve core 4 .

[0029] An oil filter aluminum pad 8 is fixedly mounted on the right side of the oil filter valve body 6 , and a left side of the oil filter aluminum pad 8 is closely attached to an end of the spring 7 away from the oil filter valve core 4 .

[0030] The oil filter aluminum pad 8 limits the oil filter valve core 4.

[0031] A baffle plate 9 is arranged on the right side of the oil filter aluminum pad 8 , and the baffle plate 9 is fixedly mounted on the right side of the oil filter valve body 6 , and the left side of the baffle plate 9 is closely attached to the right side of the oil filter aluminum pad 8 .

[0032] The baffle plate 9 limits the oil filter aluminum pad 8.

[0033] The steel plate 3 is provided with a plurality of oil holes 14 .

[0034] A control chamber 13 is disposed in the middle of the oil pan 10 , and control oil is disposed in the control chamber 13 .

[0035] The main pressure chamber 12 is provided with main pressure oil, the pressure switch 5 is electrically connected to an external controller, the oil filter 1 is used to filter the main pressure oil, and the oil hole 14 is used to control the flow of oil and main pressure oil between the oil pan 10 and the oil filter valve body 6.

[0036] Figure 2 The cleanliness of oil filter 1 at the solid line position is in normal working condition.

[0037] Figure 2 The cleanliness of oil filter 1 at the dotted line position is in a blocked state.

[0038] Embodiment 2: In some embodiments, Figure 1-Figure 3 As shown, as a preferred embodiment of the present invention, a detection method of an oil filter 1 cleanliness detection device comprises the following steps:

[0039] Step 1: In normal working state, the automatic transmission oil is filtered by the oil filter 1 and then enters the main pressure chamber 12 through the oil pan 10 channel, and enters the oil filter valve body 6 through the oil holes 14 on the paper pad 2 and steel plate 3 of the oil pan 10. The main pressure oil pressure is greater than the control oil pressure and the return spring 7, pushing the oil filter valve core 4 to move to the right, the oil filter aluminum pad 8 limits the oil filter valve core 4, and the baffle 9 limits the oil filter aluminum pad 8. At this time, the control oil enters the pressure difference detection hole on the oil filter valve body 6 through the oil holes 14 on the paper pad 2 and steel plate 3 of the oil pan 10, and the pressure switch 5 detects the oil pressure. The pressure switch 5 transmits the electrical signal to the external controller, and the external controller confirms that there is no need to replace the oil filter 1;

[0040] Step 2: When the cleanliness of the automatic transmission oil filter 1 is in a blocked state, the cleanliness of the oil filter 1 is poor, and the impurities increase. When the oil pressure passes through the oil filter 1, the pressure drops, which is not enough to overcome the return spring 7 and the control oil pressure, and cannot push the oil filter valve core 4 to move. The control oil enters the oil filter valve body 6 through the oil hole 14 on the oil pan 10 paper pad 2 and the steel plate 3. The step of the oil filter valve core 4 blocks the oil from reaching the pressure difference detection hole. At this time, the pressure switch 5 cannot detect the oil pressure, and the pressure switch 5 transmits the electrical signal to the external controller, and the external controller confirms the replacement of the oil filter 1.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil filter cleanliness detection device, comprising an oil pan (10), characterized in that: An oil filter (1) is fixedly mounted on the left side of the oil pan (10), a main pressure chamber (12) is provided on the left side of the oil pan (10), and the main pressure chamber (12) is located on the right side of the oil filter (1); a steel plate (3) is fixedly mounted on the upper side of the oil pan (10), a paper pad (2) is provided between the oil pan (10) and the steel plate (3), an oil filter valve body (6) is fixedly mounted on the upper side of the steel plate (3), an oil filter valve core (4) is slidably connected inside the oil filter valve body (6), a pressure detection hole (11) is provided on the upper side of the oil filter valve body (6), and a pressure switch (5) is fixedly mounted on the upper side of the pressure detection hole (11).

2. The oil filter cleanliness detection device according to claim 1, characterized in that: A spring (7) is fixedly mounted on the right side of the oil filter valve core (4).

3. The oil filter cleanliness detection device according to claim 2, characterized in that: An oil filter aluminum pad (8) is fixedly mounted on the right side of the oil filter valve body (6), and the left side of the oil filter aluminum pad (8) is tightly attached to an end of the spring (7) away from the oil filter valve core (4).

4. The oil filter cleanliness detection device according to claim 3, characterized in that: A baffle (9) is provided on the right side of the oil filter aluminum pad (8), and the baffle (9) is fixedly mounted on the right side of the oil filter valve body (6), and the left side of the baffle (9) is in close contact with the right side of the oil filter aluminum pad (8).

5. The oil filter cleanliness detection device according to claim 4, characterized in that: The steel plate (3) is provided with a plurality of oil holes (14).

6. The oil filter cleanliness detection device according to claim 5, characterized in that: A control chamber (13) is provided at the middle side of the oil pan (10), and control oil is provided in the control chamber (13).

7. The oil filter cleanliness detection device according to claim 6, characterized in that: The main pressure chamber (12) is provided with main pressure oil.

8. A detection method for an oil filter cleanliness detection device, used for the oil filter cleanliness detection device according to claim 7, characterized in that: The following steps are involved: Step 1: In normal working state, the automatic transmission oil is filtered by the oil filter (1) and then enters the main pressure chamber (12) through the oil pan (10) channel, and enters the oil filter valve body (6) through the oil holes (14) on the paper pad (2) and steel plate (3) of the oil pan (10). The main pressure oil pressure is greater than the combined force of the control oil pressure and the return spring (7), pushing the oil filter valve core (4) to move to the right, the oil filter aluminum pad (8) limits the oil filter valve core (4), and the baffle (9) limits the oil filter aluminum pad (8). At this time, the control oil enters the pressure difference detection hole on the oil filter valve body (6) through the oil holes (14) on the paper pad (2) and steel plate (3) of the oil pan (10), and the pressure switch (5) detects the oil pressure. The pressure switch (5) transmits an electrical signal to the external controller, and the external controller confirms that there is no need to replace the oil filter (1); Step 2: When the cleanliness of the automatic transmission oil filter (1) is in a blocked state, the cleanliness of the oil filter (1) is poor, and the impurities increase. When the oil pressure passes through the oil filter (1), the pressure drops, which is insufficient to overcome the return spring (7) and the control oil pressure, and the oil filter valve core (4) cannot be pushed to move. The control oil enters the oil filter valve body (6) through the oil hole (14) on the oil pan (10) paper pad (2) and steel plate (3). The step of the oil filter valve core (4) blocks the oil from reaching the pressure difference detection hole. At this time, the pressure switch (5) cannot detect the oil pressure. The pressure switch (5) transmits an electrical signal to the external controller, and the external controller confirms the replacement of the oil filter (1).

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