Diesel oil filter capable of switching emergency oil ways

Abstract

The utility model discloses a diesel filter capable of switching emergency oil ways, which comprises a filter seat, a filter element tank, emergency oil ways and emergency oil way valve cores, the filter seat is provided with an oil inlet channel and an oil outlet channel, and the filter element tank is mounted on the filter seat. The two ends of the emergency oil way are communicated with the oil inlet channel and the oil outlet channel respectively, and the emergency oil way valve element is installed on the emergency oil way and used for adjusting the flow of the emergency oil way. The diesel oil filter has the advantages that the fuel oil resistance generated by the diesel oil filter is greatly reduced in a specific application scene, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel filters, in particular to a diesel filter capable of switching emergency oil circuits. Background Art

[0002] Heavy-duty diesel commercial vehicles typically utilize a two-stage (fine filter + pre-filter) or three-stage (primary pre-filter + secondary pre-filter + fine filter) filtration system. The fine filter is installed at the outlet of the engine's fuel pump, while the pre-filter is typically mounted on the vehicle frame. For a three-stage filtration system, the installation logic is generally: fuel tank → primary pre-filter → secondary pre-filter → fuel pump → fine filter → injection pump, where "→" represents the fuel line. Existing three-stage diesel filtration systems have numerous components, and the fuel must pass through many components. This results in high fuel resistance upstream of the fuel pump, which affects fuel suction. This is particularly true in cold and high-altitude regions, where: (1) low atmospheric pressure reduces the fuel pump's suction capacity; and (2) low temperatures cause fuel wax to form on the diesel filter. These two factors can prevent the fuel pump from sucking fuel, hindering engine starting or even preventing it from starting. Existing solutions typically involve enlarging the fuel passages in the diesel filter, adding an electric or manual pump, or installing a heater.

[0003] For example, the existing patent document CN215333196U discloses a diesel filter with multiple oil paths, which discloses a diesel filter for a diesel engine with an electric pump, a heater and dual channels.

[0004] The primary function of a diesel filter is to intercept particles and water in the fuel. A side effect is increased fuel resistance on the inlet side of the engine's fuel supply system. The main function is achieved by: Fuel from the fuel tank first passes through the filter seat's inlet channel, then flows from the inlet channel into the periphery of the diesel filter cartridge. The fuel then passes through the filter paper, and the cleaned fuel flows to the outlet channel before entering the secondary pre-filtration described in the prior art solution, ultimately being supplied to the engine. The side effect occurs because the diesel filter cartridge is a circular can with filter paper in the center. After a period of engine use, the filter paper's resistance increases due to the increased amount of dust filtered out. Furthermore, in low-temperature environments, the fuel waxes on the filter paper, significantly increasing its resistance.

[0005] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Utility Model Content

[0006] The (main) purpose of the utility model is to provide a diesel filter with a switchable emergency oil circuit, which can significantly reduce the fuel resistance generated by the diesel filter in a specific application scenario.

[0007] To this end, the utility model proposes a diesel filter capable of switching an emergency oil circuit.

[0008] Preferably, the present invention may also have the following technical features:

[0009] A diesel filter with a switchable emergency oil circuit comprises a filter seat and a filter cartridge tank body. The filter seat is provided with an oil inlet channel and an oil outlet channel. The filter cartridge tank body is mounted on the filter seat. The filter filter further comprises an emergency oil circuit and an emergency oil circuit valve core. The two ends of the emergency oil circuit are respectively connected to the oil inlet channel and the oil outlet channel. The emergency oil circuit valve core is mounted on the emergency oil circuit and is used to adjust the flow of the emergency oil circuit.

[0010] Furthermore, the emergency oil passage extends from one side of the filter seat to the oil inlet channel and the oil outlet channel, connecting the oil inlet channel and the oil outlet channel.

[0011] Furthermore, the front end of the emergency oil circuit valve core crosses the oil inlet channel and extends to the emergency oil circuit.

[0012] Furthermore, it also includes an O-ring I and an O-ring II, and the emergency oil circuit valve core is provided with a first O-shaped groove and a second O-shaped groove, wherein the valve core rod of the emergency oil circuit valve core extending into the emergency oil circuit is provided with a first O-shaped groove for assembling the O-ring I; the rear end of the emergency oil circuit is provided with a second O-shaped groove for assembling the O-ring II.

[0013] Furthermore, the rear end of the emergency oil circuit valve core is also provided with a retaining spring, a first retaining groove and a second retaining groove, and after the first retaining groove and the second retaining groove are opened, the first retaining groove is located between the second O-shaped groove and the second retaining groove; the outside of the filter seat is provided with a retaining groove for retaining the retaining spring, and the retaining spring is installed in the retaining groove, which is used to cooperate with the first retaining groove and the second retaining groove.

[0014] Furthermore, an emergency oil line mark is designed on the surface of the filter seat.

[0015] Furthermore, the filter seat is made of aluminum.

[0016] Compared with the prior art, the present invention offers the following advantages: The emergency oil circuit directly connects the oil inlet and outlet channels, allowing diesel to enter the downstream without passing through the filter paper in the filter cartridge, resulting in virtually no resistance to the fuel on the diesel filter. The emergency oil circuit is opened or closed by adjusting the position of the emergency oil circuit valve core through the engagement of a retaining spring with the first and second retaining slots. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the present utility model.

[0018] Figure 2 It is a top view of the present utility model.

[0019] Figure 3 It is a partial cross-sectional view of the present utility model.

[0020] Figure 4 It is a schematic diagram of the retaining spring structure, which is an existing part.

[0021] Description of Reference Numerals

[0022] 1. Filter seat; 2. Filter element tank; 3. Emergency oil circuit valve core; 4. Circlip; 5. O-ring I; 6. O-ring II, 7. Oil inlet channel; 8. Oil outlet channel; 9. Emergency oil circuit; 10. First slot; 11. Second slot. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0024] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specified.

[0025] like Figure 1-3 The diesel filter with a switchable emergency oil circuit shown in FIG. 1 includes a filter seat 1 and a filter cartridge body 2. The filter seat 1 is provided with an oil inlet channel 7 and an oil outlet channel 8. The filter cartridge body 2 is mounted on the filter seat 1. Fuel enters the filter cartridge body 2 through the oil inlet channel 7, and the filtered fuel enters the oil outlet channel 8. It also includes an emergency oil circuit 9 and an emergency oil circuit valve core 3. The two ends of the emergency oil circuit 9 are connected to the oil inlet channel 7 and the oil outlet channel 8, respectively. The emergency oil circuit valve core 3 is mounted on the emergency oil circuit 9 and is used to regulate the flow rate of the emergency oil circuit 9. In this embodiment, the oil inlet channel 7 and the oil outlet channel 8 are directly connected through the emergency oil circuit 9. Diesel fuel can enter the oil outlet channel 8 without passing through the filter paper of the filter cartridge body 2. At this time, the fuel has almost no resistance on the diesel filter. Preferably, the filter seat 1 is made of aluminum. The diameter of the front end of the emergency oil circuit valve core 3 is smaller than the inner diameter of the oil inlet channel 8, reducing the impact of the emergency oil circuit valve core 3 on the oil intake.

[0026] In this embodiment, the emergency oil circuit 9 is designed to allow drivers to use it in specific situations, reducing the oil inlet resistance of the engine's fuel pump, improving the engine's starting success rate, and enabling drivers to escape from difficult driving situations. However, in non-specific situations, the diesel filter's primary function must still be achieved, requiring a device to switch between the normal oil circuit and the emergency oil circuit 9. Therefore, the on / off state of the emergency oil circuit 9 is controlled by the emergency oil circuit valve core 3.

[0027] In some embodiments, the emergency oil circuit 9 extends from one side of the filter seat 1 toward the oil inlet channel 7 and the oil outlet channel 8, connecting the oil inlet channel 7 and the oil outlet channel 8. The emergency oil circuit valve core 3 is a columnar valve stem structure that cooperates with the emergency oil circuit 9, and its front end crosses the oil inlet channel 7 and extends to the emergency oil circuit 9. The operation method of the emergency oil circuit valve core 3 includes: when the emergency oil circuit 9 is needed in a specific situation, the front end of the emergency oil circuit valve core 3 is withdrawn from the emergency oil circuit 9 and withdrawn to a point where the front end of the emergency oil circuit valve core 3 does not interfere with the oil inlet channel 7. At this time, the emergency oil circuit 9 connects the oil inlet channel 7 and the oil outlet channel 8, and the fuel can enter the oil outlet channel 8 from the oil inlet channel 7 through the emergency oil circuit 9; when the emergency oil circuit needs to be closed in non-specific situations, the front end of the emergency oil circuit valve core 3 is extended into the emergency oil circuit 9 to close the emergency oil circuit 9. At this time, the fuel must pass through the filter element tank 2 to enter the oil outlet channel 8.

[0028] Preferably, it also includes an O-ring I5 and an O-ring II6, and the emergency oil circuit valve core 3 is provided with a first O-shaped groove and a second O-shaped groove, wherein the valve core rod of the emergency oil circuit valve core 3 extending into the emergency oil circuit 9 is provided with a first O-shaped groove for assembling the O-ring I5 to strengthen the sealing of the emergency oil circuit 9; the rear end of the emergency oil circuit 9 is provided with a second O-shaped groove for assembling the O-ring II6 to strengthen the sealing of the oil outlet channel 8 and the external environment.

[0029] Furthermore, the rear end of the emergency oil circuit valve core 3 is also provided with a retaining spring 4, a first retaining groove 10, and a second retaining groove 11. After the first retaining groove 10 and the second retaining groove 11 are provided with a second O-shaped groove, the first retaining groove 10 is located between the second O-shaped groove and the second retaining groove 11, and the second retaining groove 11 is located between the first retaining groove 10 and the rear end face of the emergency oil circuit valve core 3. The position of the emergency oil circuit valve core 3 is adjusted by the cooperation of the retaining spring 4 and the first retaining groove 10 and the second retaining groove 11 to open or close the emergency oil circuit 9. Correspondingly, a connecting groove for connecting the retaining spring 4 is provided on the outside of the filter seat 1. The retaining spring 4 is installed in the connecting groove and is used to cooperate with the first retaining groove 10 and the second retaining groove 11 to position the emergency oil circuit valve core 3 at a predetermined position.

[0030] In this invention, the mechanism for adjusting the position of the emergency oil circuit valve core is composed of a retaining spring 4, dual O-rings, and dual retaining grooves, along with their retaining grooves on the filter housing 1. During normal operation, O-ring I 5 reinforces the seal of the emergency oil circuit 9, closing the connection between the oil inlet channel 7 and the oil outlet channel 8. O-ring II 6 seals the internal oil circuit (the oil inlet channel) of the filter housing 1 from the external environment. Retaining spring 4 engages second retaining groove 11 on the emergency oil circuit valve core 3. At this point, the diesel filter can function effectively, and fuel must pass through the filter cartridge housing 2 before entering the oil outlet channel 8. In special applications, when it is necessary to reduce oil inlet resistance, the driver opens the retaining spring 4 and pulls the emergency oil circuit valve core 3 outward, causing the retaining spring 4 to engage the first retaining groove 10 of the emergency oil circuit valve core 3. At this time, the front end of the emergency oil circuit valve core 3 exits the emergency oil circuit 9, connecting the oil inlet channel 7 and the oil outlet channel 8. The O-ring II 6 still seals the internal oil circuit of the filter seat 1 from the external environment. At this time, the fuel can bypass the filter paper of the filter element tank 2 and directly enter the oil outlet channel 8 from the oil inlet channel 7 through the emergency oil circuit 9 in the filter seat 1, thereby reducing fuel resistance. The driver can switch the oil circuit by adjusting the position of the retaining spring 4 on the emergency oil circuit valve core 3. The retaining spring 4 is used to fix the emergency oil circuit valve core 3 for ease of operation, and it can be switched manually.

[0031] In particular, an emergency oil circuit logo is designed on the surface of the diesel filter aluminum seat to enable the driver to better identify and use the emergency function.

[0032] Those skilled in the art will recognize that numerous variations to the foregoing description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0033] Although what are considered exemplary embodiments of the present invention have been described and illustrated, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept of the present invention as described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but rather may include all embodiments and their equivalents falling within the scope of the present invention.

Claims

1. A diesel filter with a switchable emergency oil circuit, comprising a filter seat and a filter cartridge body, wherein the filter seat is provided with an oil inlet channel and an oil outlet channel, and the filter cartridge body is mounted on the filter seat, characterized in that: It also includes an emergency oil circuit and an emergency oil circuit valve core. The two ends of the emergency oil circuit are respectively connected to the oil inlet channel and the oil outlet channel. The emergency oil circuit valve core is installed on the emergency oil circuit to adjust the flow of the emergency oil circuit.

2. A diesel filter with a switchable emergency oil circuit as claimed in claim 1, characterized in that: The emergency oil passage extends from one side of the filter seat to the oil inlet channel and the oil outlet channel, connecting the oil inlet channel and the oil outlet channel.

3. A diesel filter with a switchable emergency oil circuit as claimed in claim 2, characterized in that: The front end of the emergency oil circuit valve core crosses the oil inlet channel and extends to the emergency oil circuit.

4. A diesel filter with a switchable emergency oil circuit as claimed in claim 3, characterized in that: It also includes an O-ring I and an O-ring II. The emergency oil circuit valve core is provided with a first O-shaped groove and a second O-shaped groove, wherein the valve core rod of the emergency oil circuit valve core extending into the emergency oil circuit is provided with a first O-shaped groove for assembling the O-ring I; the rear end of the emergency oil circuit is provided with a second O-shaped groove for assembling the O-ring II.

5. The diesel filter with a switchable emergency oil circuit according to claim 1, characterized in that: The rear end of the emergency oil circuit valve core is also provided with a retaining spring, a first retaining groove and a second retaining groove, and after the first retaining groove and the second retaining groove are provided with a second O-shaped groove, wherein the first retaining groove is located between the second O-shaped groove and the second retaining groove; the outside of the filter seat is provided with a retaining groove for retaining the retaining spring, and the retaining spring is installed in the retaining groove, which is used to cooperate with the first retaining groove and the second retaining groove.

6. A diesel filter with a switchable emergency oil circuit as claimed in claim 1, characterized in that: An emergency oil circuit mark is designed on the surface of the filter seat.

7. A diesel filter with a switchable emergency oil circuit as claimed in claim 1, characterized in that: The filter seat is made of aluminum.

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