Corrugated nylon tube for reducing fuel pressure fluctuations

Abstract

The utility model discloses a corrugated nylon pipe of reducing fuel pressure fluctuation relates to the field of automobile parts. The corrugated nylon pipe of reducing fuel pressure fluctuation, including the pipeline main part and both ends's fast plug connector, the material of pipeline main part adopts the nylon base material PA612 and adds the ETFE layer in, and the periodic wave -shaped recess / protruding of pipeline main part's pipe body inside, outside wall is equipped with. The corrugated nylon pipe of reducing fuel pressure fluctuation, oil return is in the corrugated pipe due to energy dissipation effect: when pressure wave meets corrugation, will take place reflection, refraction and interference, and the corrugation recess forms local vortex flow, will pressure energy conversion heat energy and elastic potential energy, thereby makes the energy of pressure wave get dispersion and consumption, and the flexible deformation of corrugated pipe, and the corrugated structure can also play the buffer effect of similar spring, absorbs the energy of pressure fluctuation, and the amplitude of relieving system impact reduces pressure fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a corrugated nylon tube for reducing fuel pressure fluctuations. Background Technology

[0002] As the operating conditions change, the return oil pressure of the high-pressure oil pump in a car engine will change, resulting in fluctuations in the return oil pressure. This can cause fluctuations in the return oil pipe and even vibrations at the pipe clamp fixing point. In severe cases, it can also cause vibrations in the body sheet metal, leading to NVH problems in the passenger compartment.

[0003] Current smooth-walled nylon or fluororubber tubing lacks elastic deformation capacity, cannot absorb the energy of pressure fluctuations, and cannot change the transmission path of fuel pressure through corrugations. Therefore, it cannot reduce pressure fluctuations. This application proposes a corrugated nylon tubing to reduce fuel pressure fluctuations. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a corrugated nylon tube for reducing fuel pressure fluctuations. This solves the problem that current smooth-walled nylon tubes or fluororubber oil tubes lack elastic deformation capabilities, cannot absorb the energy of pressure fluctuations, and cannot change the transmission path of fuel pressure through corrugations, thus failing to reduce pressure fluctuations.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a corrugated nylon tube for reducing fuel pressure fluctuations, comprising: The main body of the pipeline is made of PA612 with an internal ETFE (ethylene tetrafluoroethylene copolymer) layer, and the inner and outer walls of the main body of the pipeline are provided with periodic wavy grooves / protrusions. The wave pitch q of the wavy protrusions on the outer wall of the main body of the pipeline is set to 3.6 to 5.0 mm, and the wave height is set to 2 to 4 mm.

[0006] Preferably, the outer diameter D of the pipeline body is set to 13mm and the inner diameter d is set to 8mm.

[0007] Preferably, the wave pitch q of the main body of the pipeline is set to 4.2 mm and the wave height is set to 3 mm.

[0008] Preferably, quick-connect male connectors and quick-connect female connectors are installed at both ends of the main body of the pipeline.

[0009] This utility model discloses a corrugated nylon tube for reducing fuel pressure fluctuations, which has the following beneficial effects: 1. This corrugated nylon pipe for reducing fuel pressure fluctuations uses PA612 material with an internal ETFE (ethylene tetrafluoroethylene copolymer) layer. The inner and outer walls of the pipe body feature periodic wavy grooves / protrusions, forming a nylon corrugated pipe. When the high-pressure fuel pump's return fuel enters the corrugated nylon pipe, the mechanical resonance effect of the corrugated structure causes the corrugation period to resonate with the pressure pulsation frequency, resulting in absorption. Within the corrugated pipe, the return fuel experiences energy dissipation: pressure waves encountering the corrugations undergo reflection, refraction, and interference, and local eddies form at the corrugation recesses, converting pressure energy into heat and elastic potential energy. This disperses and dissipates the energy of the pressure waves. Simultaneously, the flexible deformation of the corrugated pipe allows the corrugated structure to act as a spring-like buffer, absorbing the energy of pressure fluctuations, mitigating system impact, and reducing the amplitude of pressure fluctuations.

[0010] 2. The corrugated nylon hose that reduces fuel pressure fluctuations has quick-connect fittings installed at both ends of the main body of the hose. The two ends of the main body of the hose are connected to the return port of the high-pressure fuel pump and the return fuel line of the vehicle through quick-connect male and quick-connect female fittings to ensure that the return fuel does not leak. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram showing the parameters of the main body of the pipeline of this utility model.

[0013] In the diagram: 1. Pipeline body; 2. Quick-connect male connector; 3. Quick-connect female connector. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] This application provides a corrugated nylon tube to reduce fuel pressure fluctuations, solving the problem that current smooth-walled nylon tubes or fluororubber oil tubes lack elastic deformation capabilities, cannot absorb the energy of pressure fluctuations, and cannot change the transmission path of fuel pressure through corrugations, thus failing to reduce pressure fluctuations.

[0016] The main body of the pipeline 1 is made of PA612 with an internal ETFE (ethylene tetrafluoroethylene copolymer) layer. The outer wall of the main body 1 has periodic corrugated grooves / protrusions, forming a nylon corrugated pipe. When the return fuel from the high-pressure fuel pump enters the corrugated nylon pipe, the mechanical resonance effect of the corrugated structure—the corrugation period resonates with the pressure pulsation frequency—leads to absorption. The energy dissipation effect within the corrugated pipe further amplifies this: pressure waves encountering the corrugations undergo reflection, refraction, and interference, and local eddies form at the corrugation recesses, converting pressure energy into heat and elastic potential energy. This disperses and dissipates the energy of the pressure waves. Simultaneously, the flexible deformation of the corrugated pipe allows the corrugated structure to act as a spring-like buffer, absorbing the energy of pressure fluctuations, mitigating system impact, and reducing the amplitude of pressure fluctuations.

[0017] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0018] This utility model discloses a corrugated nylon tube for reducing fuel pressure fluctuations.

[0019] According to the appendix Figure 1-2 As shown, it includes: The main body of the pipeline 1 is made of PA612 with an internal ETFE (ethylene tetrafluoroethylene copolymer) layer. The outer wall of the main body of the pipeline 1 is provided with periodic wavy grooves / protrusions. The wave pitch q of the wavy protrusions on the outer wall of the main body of the pipeline 1 is set to 3.6 to 5.0 mm, and the wave height is set to 2 to 4 mm.

[0020] The main body of the pipeline 1 is made of PA612 material with an added ETFE (ethylene tetrafluoroethylene copolymer) layer. The outer wall of the main body 1 has periodic corrugated grooves / protrusions, forming a nylon corrugated pipe. The inner wall of the nylon corrugated pipe remains smooth to reduce fuel flow resistance. When the return fuel from the high-pressure fuel pump enters the corrugated nylon pipe, due to the mechanical resonance effect of the corrugated structure—the corrugation period resonates with the pressure pulsation frequency—it absorbs the pressure. The return fuel also exhibits energy dissipation within the corrugated pipe: when pressure waves encounter the corrugations, they are reflected, refracted, and interfered with, and local eddies are formed at the corrugation recesses, converting pressure energy into heat energy and elastic potential energy. This disperses and dissipates the energy of the pressure waves. Simultaneously, the flexible deformation of the corrugated pipe allows the corrugated structure to act as a spring-like buffer, absorbing the energy of pressure fluctuations, mitigating system impact, and reducing the amplitude of pressure fluctuations.

[0021] Furthermore, the outer diameter D of the main pipe body 1 is set to 13mm, and the inner diameter d is set to 8mm.

[0022] Furthermore, the wave pitch q of the main body of the pipeline is set to 4.2 mm, and the wave height is set to 3 mm.

[0023] Furthermore, quick-connect male connectors 2 and quick-connect female connectors 3 are respectively installed at both ends of the main body of the pipeline 1.

[0024] The two ends of the main body of the pipeline 1 are respectively equipped with quick-connect male connector 2 and quick-connect female connector 3. The two ends of the main body of the pipeline 1 are connected to the return port of the high-pressure fuel pump and the return oil pipe of the whole vehicle through quick-connect male connector 2 and quick-connect female connector 3 to ensure that the return oil will not leak.

[0025] The main body of the pipeline 1 is made of PA612 with an internal ETFE (ethylene tetrafluoroethylene copolymer) layer. The outer wall of the main body 1 has periodic corrugated grooves / protrusions, forming a nylon corrugated pipe. When the return fuel from the high-pressure fuel pump enters the corrugated nylon pipe, the mechanical resonance effect of the corrugated structure—the corrugation period resonates with the pressure pulsation frequency—leads to absorption. Furthermore, the return fuel dissipates energy within the corrugated pipe; when pressure waves encounter the corrugations, they are reflected, refracted, and interfered with, and local eddies are formed at the corrugation recesses, converting pressure energy into heat and elastic potential energy. This disperses and dissipates the energy of the pressure waves. Simultaneously, the flexible deformation of the corrugated pipe allows the corrugated structure to act as a spring-like buffer, absorbing the energy of pressure fluctuations, mitigating system impact, and reducing the amplitude of pressure fluctuations.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A corrugated nylon tube for reducing fuel pressure fluctuations, characterized in that, include: The pipeline body (1) is made of nylon substrate PA612 with an added ETFE layer. The inner and outer walls of the pipeline body (1) are provided with periodic wavy grooves / protrusions. The wave pitch q of the wavy protrusions on the inner and outer walls of the pipeline body (1) is set to 3.6 to 5.0 mm, and the wave height is set to 2 to 4 mm.

2. The corrugated nylon tube for reducing fuel pressure fluctuations according to claim 1, characterized in that, The outer diameter D of the main body of the pipeline (1) is set to 13mm, and the inner diameter d is set to 8mm.

3. The corrugated nylon tube for reducing fuel pressure fluctuations according to claim 1, characterized in that, The wave pitch q of the main body of the pipeline (1) is set to 4.2 mm and the wave height is set to 3 mm.

4. The corrugated nylon tube for reducing fuel pressure fluctuations according to claim 1, characterized in that, The two ends of the pipeline body (1) are respectively equipped with quick-connect male connector (2) and quick-connect female connector (3).

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