An integrated oil level sensor with heater

Abstract

The utility model is integrated oil level sensor with heater, the structure is that the top end entrance of return pipe is fixed on the mounting seat of fuel tank top, the return pipe extends to the inside bottom of fuel tank and is fixed through the fixed plate, at least two return flow ports are evenly arranged in the middle part to the bottom of return pipe, the electronic tube and the threading pipe are further installed between the mounting seat and the fixed plate, the electronic tube is installed with the float, the electronic tube and the threading pipe top end are connected the wire harness plug -in of mounting seat, the fixed plate is installed with PTC heater. When working, the return flow fuel returns by return pipe, flows out from each return flow port, can all -round impact the waxing of fuel oil in fuel tank, compared with bottom return flow port, can improve the waxing solution effect, improve the uniformity. The utility model has the advantages that: the bottom end return flow port of prior art is changed into porous three -dimensional space oil return structure, can increase the oil flushing space, effectively improve the impact effect on waxing, auxiliary heater solves the waxing problem, improves the thawed fuel quantity, avoids the flameout condition.

Description

Technical Field

[0001] This utility model relates to an integrated fuel level sensor, specifically an integrated fuel level sensor with a heater for vehicle fuel tanks. Background Technology

[0002] Vehicles using No. 0 diesel fuel are prone to waxing in cold environments, causing difficulties in cold starting the engine.

[0003] Existing technologies incorporate fuel level sensors with integrated heating devices to heat the fuel. The overall structure involves an integrated heater, fuel level sensing components, and a return pipe. However, the return port of the existing return pipe is generally located at the bottom and there is only one. This type of return structure is not conducive to the flushing and defrosting of fuel with low-temperature waxing. The amount of defrosted fuel is small, and the engine will generally stall after 15 minutes due to the lack of defrosted fuel after the vehicle is started. Utility Model Content

[0004] This invention proposes an integrated oil level sensor with a heater, which aims to overcome the above-mentioned shortcomings of the prior art, improve the reflux port setting, and improve the performance.

[0005] The technical solution of this utility model is an integrated fuel level sensor with a heater. Its structure includes a return pipe, an electron tube, a wiring conduit, and a PTC heater. The inlet at the top of the return pipe is fixed to a mounting base on the top of the fuel tank. The return pipe extends to the bottom of the inner side of the fuel tank and is fixed by a fixing plate. At least two return ports are evenly spaced from the middle to the bottom of the return pipe. An electron tube and a wiring conduit are also installed between the mounting base and the fixing plate. A float is mounted on the electron tube. The tops of the electron tube and the wiring conduit are connected to a wiring harness connector on the mounting base. The PTC heater is mounted on the fixing plate. During operation, the returned fuel flows back through the return pipe and out through each return port, effectively impacting the wax deposits in the fuel tank from all directions. Compared to a single return port at the bottom, this improves the wax removal effect and enhances uniformity.

[0006] Preferably, the reflux port is located on the same side as the reflux pipe.

[0007] Preferably, the reflux ports are grouped on opposite sides of the reflux pipe. This further improves the impact wax deposition effect.

[0008] Preferably, it also includes an overflow pipe, the top outlet of which is fixed to a mounting bracket on the top of the fuel tank, and the overflow pipe extends to the upper inner side of the fuel tank.

[0009] The advantages of this utility model are: reasonable structural design, which moves the return port located at the bottom of the existing technology to the middle and lower part of the return pipe on both sides, forming a porous three-dimensional space oil return structure, which can increase the oil return flushing space, effectively improve the impact effect on wax, assist the heater to solve the wax problem, increase the amount of fuel to defrost, and effectively prevent the vehicle from stalling after starting in cold environments. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of one embodiment of the integrated oil level sensor with heater of this utility model.

[0011] Figure 2 This is a schematic diagram of another angle of one embodiment of the integrated oil level sensor with heater of this utility model.

[0012] In the diagram, 1 is the mounting base, 2 is the return pipe, 21 is the return port, 3 is the overflow pipe, 4 is the electron tube, 41 is the float, 5 is the conduit, 51 is the wire harness plug, 6 is the mounting plate, 7 is the PTC heater, and 71 is the fixing bolt. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to embodiments and specific implementation methods.

[0014] like Figure 1 , 2 As shown, an integrated fuel level sensor with a heater includes a return pipe 2, an overflow pipe 3, an electron tube 4, a wiring conduit 5, and a PTC heater 7. The top inlet of the return pipe 2 and the top outlet of the overflow pipe 3 are fixed to a mounting base 1 on the top of the fuel tank. The overflow pipe 3 extends to the upper part of the inner side of the fuel tank, and the return pipe 2 extends to the bottom of the inner side of the fuel tank and is fixed by a fixing plate 6. At least two return ports 21 are evenly spaced from the middle to the bottom of the return pipe 2. The electron tube 4 and the wiring conduit 5 are also installed between the mounting base 1 and the fixing plate 6. The electron tube 4 is equipped with a float 41. The tops of the electron tube 4 and the wiring conduit 5 are connected to the wiring harness plug 51 on the mounting base 1. The fixing plate 6 is equipped with a PTC heater 7, which is fixed to the fixing plate 6 by fixing bolts 71.

[0015] In the specific design, 4-5 return ports 21 can be preferably set, located on the same side of the return pipe 2, or grouped on opposite sides of the return pipe 2, to further improve the impact waxing effect.

[0016] Based on the above structure, during operation, the return fuel flows back through the return pipe 2 and flows out from each return port 21, which can impact the wax deposits in the fuel tank from all directions. Compared with a single bottom return port, it can improve the wax removal effect and increase uniformity. The float 41 is used to determine the fuel level, and the PTC heater is used to heat the fuel. Example

[0017] The diameter of the reflux port 21 is 3-6mm. The distance between the bottommost reflux port and the bottom end of the reflux pipe 2, as well as the distance between each adjacent reflux port 21 in the vertical direction of the reflux pipe 2, is 20-50mm. There are a total of 5 reflux ports 21: the first group of 3 reflux ports 21 are set close to the bottom end of the reflux pipe 2, and the second group of 2 reflux ports 21 are located above the first group. The reflux ports 21 in the same group are in the same position in the vertical direction of the reflux pipe 2. The angle between the line connecting the center of the first group of reflux ports 21 and the center of the reflux pipe 2 in the vertical direction and the line connecting the center of the second group of reflux ports 21 and the center of the reflux pipe 2 in the vertical direction is about 180°.

[0018] A comparative experiment was conducted at a test site in the cold region of Mohe, with an ambient temperature of -30℃. The test vehicles were two identical tractor trucks of a certain model, equipped with a 740L main fuel tank and a 40L auxiliary fuel tank. The fuel tank contained 0# fuel. The auxiliary fuel tank was used to supply fuel during engine start-up and to receive return fuel. In the auxiliary fuel tanks of the two vehicles, an oil level sensor with an integrated heating device with a single return port and located at the bottom of the return pipe (vehicle A) and an integrated oil level sensor with a heater (vehicle B) of this invention were installed.

[0019] After the vehicle has been frozen for 48 hours, an engine start-up test is conducted.

[0020] After vehicle A was started, the engine shut off after 19 minutes because there was no available fuel in the auxiliary fuel tank to thaw the engine.

[0021] After vehicle B is started, it runs for 60 minutes without being turned off because there is enough fuel in the auxiliary fuel tank to thaw the main metal fuel tank. Once the main metal fuel tank is thawed, the fuel supply system can provide fuel continuously.

[0022] As can be seen from the above results, compared with the prior art, the integrated oil level sensor with heater of this utility model can effectively solve the problem of engine stalling after starting due to insufficient fuel after defrosting.

[0023] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. An integrated oil level sensor with heater, characterized by, The device includes a return pipe (2), an electron tube (4), a conduit (5), and a PTC heater (7). The top inlet of the return pipe (2) is fixed on the mounting base (1) on the top of the fuel tank. The return pipe (2) extends to the bottom of the inner side of the fuel tank and is fixed by a fixing plate (6). At least two return ports (21) are evenly spaced from the middle to the bottom of the return pipe (2). An electron tube (4) and a conduit (5) are also installed between the mounting base (1) and the fixing plate (6). A float (41) is installed on the electron tube (4). The top ends of the electron tube (4) and the conduit (5) are connected to the wiring harness plug (51) on the mounting base (1). A PTC heater (7) is installed on the fixing plate (6).

2. An integrated oil level sensor with heater as claimed in claim 1, wherein, The reflux ports (21) are arranged in groups on opposite sides of the reflux pipe (2).

3. An integrated oil level sensor with heater as claimed in claim 1, wherein, The reflux port (21) is located on the same side as the reflux pipe (2).

4. An integrated oil level sensor with heater as claimed in claim 1, wherein, It also includes an overflow pipe (3), the top outlet of which is fixed to the mounting base (1) on the top of the fuel tank, and the overflow pipe (3) extends to the upper part of the inner side of the fuel tank.

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