A fuel consumption analysis device and detection method

Abstract

This invention relates to the field of vehicle fuel consumption detection technology, and proposes a fuel consumption analysis device and detection method, including a fuel delivery pipe, a separator, and multiple ultrasonic detectors. The separator is fixedly installed inside the fuel delivery pipe, dividing the inner cavity of the fuel delivery pipe into two delivery chambers and a return chamber. The two delivery chambers are identical in shape and size and are symmetrically arranged. The return chamber is located at the top of the two delivery chambers. One end of each delivery chamber and both ends of the return chamber are connected to the fuel tank, and the other end of each delivery chamber is connected to the engine. By setting a separator inside the fuel delivery pipe, dividing the inner cavity of the fuel delivery pipe into a top-positioned return chamber and two symmetrical delivery chambers, this invention not only allows air bubbles in the fuel to flow back to the fuel tank along the return chamber, but also allows for comparison of the fuel flow rates in the two delivery chambers, thereby improving the detection accuracy of this fuel consumption analysis device.

Description

Technical Field

[0001] This invention relates to the field of vehicle fuel consumption detection technology, and in particular to a fuel consumption analysis device and detection method. Background Technology

[0002] Fuel consumption is one of the important indicators for drivers to understand the vehicle they are driving. It not only allows drivers to make timely judgments about vehicle malfunctions, but also helps to promote drivers to improve their driving habits. Fuel consumption is usually detected using fuel consumption analysis devices installed on the vehicle.

[0003] The invention patent with patent publication number CN114812717A discloses an on-board fuel consumption meter, a fuel consumption detection system and a measurement method. The on-board fuel consumption meter is set between the fuel tank and the engine. The fuel flowing out of the engine returns to the fuel tank after passing through the fuel return measurement unit of the on-board fuel consumption meter, resulting in higher measurement accuracy.

[0004] In the above technical solution, an oil inlet measurement unit is set between the engine and the fuel tank in order to measure fuel consumption. However, as the vehicle's service life increases, the performance of the oil pump and fuel pipeline will deteriorate, which may result in air bubbles in the fuel, affecting the detection accuracy of the fuel consumption analysis device. Summary of the Invention

[0005] In view of this, the present invention proposes a fuel consumption analysis device and detection method that can allow fuel containing air bubbles to flow back into the fuel tank, thereby improving the detection accuracy of the fuel consumption analysis device.

[0006] The technical solution of this invention is implemented as follows: On one hand, this invention provides an oil consumption analysis device, including an oil pipeline, a separator, and multiple ultrasonic detectors, wherein...

[0007] The separator is fixedly installed inside the oil pipe. The separator divides the inner cavity of the oil pipe into two oil supply chambers and one return chamber. The two oil supply chambers are the same in shape and size and are symmetrically arranged. The return chamber is located at the top of the two oil supply chambers. One end of the oil supply chamber and both ends of the return chamber are connected to the oil tank. The other end of the oil supply chamber is connected to the engine.

[0008] Multiple ultrasonic detectors are used to detect the flow rate of fuel in the two fuel delivery chambers, respectively.

[0009] Based on the above technical solutions, preferably, the two ends of the oil pipeline are the oil inlet end and the oil outlet end, respectively, and the separator is located inside the oil pipeline near the oil outlet end;

[0010] Multiple air combs are fixedly installed at the end of the separator away from the oil outlet. The air combs are located inside the oil supply pipe. The multiple air combs are arranged in parallel and at intervals. The distance between the air combs and the top of the oil supply pipe gradually decreases along the direction from the oil inlet to the oil outlet.

[0011] More preferably, the oil pipeline includes two side walls and one top wall, the cross-sections of the side walls and the top wall are both arc-shaped, and the two side walls and the top wall together form a circular tubular structure;

[0012] The partition frame includes two side frames and one top frame, wherein,

[0013] The side frame is fixedly installed on the side wall and surrounds it to form the oil delivery chamber. The two side frames correspond one-to-one with the two side walls, and the multiple air combs are fixedly installed on the side frame.

[0014] The top frame is fixedly mounted on the top wall and surrounds it to form the reflux cavity;

[0015] Multiple ultrasonic detectors are fixedly mounted on the side wall or the side frame. Each of the oil delivery chambers has one ultrasonic detector on each side. The straight line of two ultrasonic detectors located on the same side of the oil delivery chamber intersects the center line of the oil delivery chamber but is not perpendicular to it.

[0016] More preferably, each of the two side frames is provided with multiple fixing slots, one of the side frames is fixedly provided with a fixing tube, and the two side frames are connected by the fixing tube and the fixing slot through a snap-fit ​​connection.

[0017] Multiple fixing tubes are fixedly installed on the bottom side of the top frame, and the top frame and the two side frames are connected by the fixing tubes and the fixing grooves.

[0018] More preferably, each of the side frames has a slot;

[0019] The bottom side of the top frame is provided with two hooks that engage with the slots and correspond one-to-one.

[0020] More preferably, the hook includes a support portion and a holding portion, wherein,

[0021] The support is fixedly mounted on the top frame and extends through the slot;

[0022] The abutment is fixedly disposed on one side of one of the support parts near the other support part and is engaged with the side frame. A positioning groove is provided on the bottom side of the abutment.

[0023] More preferably, heating channels are provided in both the side frame and the air comb, and the heating channels in the corresponding side frame and the air comb are connected to each other. The heating channels in the two side frames are connected to each other through the fixed pipe.

[0024] More preferably, the axial lengths of the plurality of fixed tubes are not the same.

[0025] More preferably, it also includes a housing, an opening on one side of the housing, and a cover detachably fixed to the housing, the cover selectively blocking the opening;

[0026] An oil inlet pipe and an oil outlet pipe are fixedly installed on the outer shell and communicate with the interior therewith. A limiting groove is formed at one end of the oil outlet pipe near the oil inlet pipe. The outer diameter of the oil delivery pipe is equal to the inner diameter of the oil inlet pipe and the inner diameter of the limiting groove, and is larger than the inner diameter of the oil outlet pipe.

[0027] A blocking plate is fixedly installed between the top frame and the top wall. The blocking plate seals the end of the reflux chamber near the oil outlet. A reflux hole is opened on the top wall. An abutment plate is fixedly installed in the reflux hole. A reflux pipe is slidably installed on the outer shell. The reflux pipe passes through the outer shell and is connected to the reflux chamber through the reflux hole. A nut is threadedly connected to the outside of the reflux pipe. The nut abuts against the inner wall of the outer shell so that the reflux pipe abuts against the abutment plate.

[0028] Secondly, the present invention provides a fuel consumption detection method, employing the aforementioned fuel consumption analysis device, comprising the following steps:

[0029] S1, use pipelines to connect the oil inlet pipe and the return pipe to the inside of the oil tank, connect the oil outlet pipe to the engine, connect the ultrasonic detector to the ultrasonic flow rate detection device, and supply heat exchange medium into the heating channel.

[0030] S2, start the oil pump to allow fuel to flow into the fuel supply pipe and be divided into three fuel streams by the separator. The three fuel streams are located in the two fuel supply chambers and the return chamber, respectively.

[0031] S3, The flow velocity of the fuel flow in the two oil delivery chambers is detected by the ultrasonic detector and denoted as X and Y respectively;

[0032] S4. If X = Y, then calculate the vehicle fuel consumption based on the flow velocity X and the vehicle mileage. If X ≠ Y, then calculate the ultrasonic attenuation of the ultrasonic detectors on both sides of the two oil delivery chambers, denoted as M and N respectively. If M > N, then calculate the vehicle fuel consumption based on the flow velocity Y and the vehicle mileage. If M ≤ N, then calculate the vehicle fuel consumption based on the flow velocity X and the vehicle mileage.

[0033] The fuel consumption analysis device and detection method of the present invention have the following advantages over the prior art:

[0034] (1) By setting a partition frame in the oil pipeline, the inner cavity of the oil pipeline is divided into a return cavity at the top and two oil pipelines on the left and right sides. This not only allows air bubbles in the fuel to flow back into the fuel tank along the return cavity, but also allows the fuel flow rate of the two oil pipelines to be compared, thereby improving the detection accuracy of this fuel consumption analysis device.

[0035] (2) By setting up the air comb, not only can the air bubbles in the fuel be guided, but also the impurities inside the fuel can be guided, preventing the air bubbles and impurities from flowing into the fuel delivery chamber. By setting up the heating channel, the temperature of the fuel can be kept uniform, thereby further improving the detection accuracy of this fuel consumption analysis device.

[0036] (3) By setting fixed pipes, fixed grooves, hooks, positioning grooves and limiting grooves, the fuel consumption analysis device can be easily disassembled and assembled, thereby improving the processing efficiency and maintenance efficiency of the fuel consumption analysis device. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a perspective view of a fuel consumption analysis device according to the present invention;

[0039] Figure 2 This is a cross-sectional view of a fuel consumption analysis device according to the present invention;

[0040] Figure 3 This is a front view of the oil pipeline in an oil consumption analysis device according to the present invention;

[0041] Figure 4 This is a perspective view of the air comb in a fuel consumption analysis device according to the present invention;

[0042] Figure 5 for Figure 3 Sectional view at point AA;

[0043] Figure 6 for Figure 3 Sectional view at point BB;

[0044] Figure 7 for Figure 3Sectional view at CC;

[0045] Figure 8 This is a perspective view of the side frame in a fuel consumption analysis device of the present invention;

[0046] Figure 9 This is a perspective view of the top wall of a fuel consumption analysis device according to the present invention;

[0047] Figure 10 This is a perspective view of the top frame in a fuel consumption analysis device according to the present invention;

[0048] Figure 11 This is a perspective view of the hook in a fuel consumption analysis device of the present invention;

[0049] Figure 12 This is a perspective view of the heating flow channel in a fuel consumption analysis device according to the present invention;

[0050] Figure 13 This is a perspective view of the outer casing of a fuel consumption analysis device according to the present invention.

[0051] The components are as follows: 1. Oil delivery pipe; 11. Side wall; 12. Top wall; 121. Abutment plate; 101. Oil delivery chamber; 102. Return chamber; 103. Oil inlet end; 104. Oil outlet end; 105. Return hole; 2. Separator frame; 21. Side frame; 22. Top frame; 211. Air comb; 212. Fixing pipe; 221. Hook; 222. Blocking plate; 2211. Support part; 2212. Abutment part; 201. Fixing groove; 202. Slot; 203. Positioning groove; 204. Heating channel; 3. Ultrasonic detector; 4. Outer shell; 41. Oil inlet pipe; 42. Oil outlet pipe; 43. Return pipe; 44. Cover; 431. Nut; 401. Opening; 402. Limiting groove. Detailed Implementation

[0052] The technical solutions of this invention will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0053] like Figure 1-13 As shown, an oil consumption analysis device of the present invention includes an oil pipeline 1, a separator 2, multiple ultrasonic detectors 3, and a housing 4.

[0054] Among them, fuel pipe 1 is a fuel flow channel used to connect the fuel tank and the engine.

[0055] The separator 2 is fixedly installed inside the oil pipeline 1, such as Figure 5As shown, the cross-section of the separator 2 is preferably T-shaped or Y-shaped, which divides the inner cavity of the fuel supply pipe 1 into two fuel supply chambers 101 and one return chamber 102. The two fuel supply chambers 101 are the same size and shape and are symmetrically arranged. The return chamber 102 is located at the top of the two fuel supply chambers 101, that is, the return chamber 102 and the two fuel supply chambers 101 are distributed in a triangular shape. One end of the fuel supply chamber 101 and both ends of the return chamber 102 are connected to the fuel tank. The other end of the fuel supply chamber 101 is connected to the engine. When there are air bubbles in the fuel in the fuel supply pipe 1, the air bubbles will be located at the top of the fuel supply pipe 1 due to density. By setting the return chamber 102 at the top of the fuel supply pipe 1, the fuel with air bubbles can be returned to the fuel tank through the return chamber 102, avoiding the problem of air bubbles entering the fuel supply chamber 101 and reducing the accuracy of fuel consumption detection and affecting the normal operation of the engine.

[0056] Not only may air bubbles appear in the fuel, but impurities may also be present, affecting the accuracy of fuel consumption detection. To prevent impurities and air bubbles from entering the fuel delivery chamber 101, multiple air combs 211 can be installed, such as... Figure 2 and Figure 3 As shown, the two ends of the oil pipe 1 are the inlet end 103 and the outlet end 104, respectively. The separator 2 is located inside the oil pipe 1 near the outlet end 104. The air comb 211 is fixedly installed on the separator 2 away from the outlet end 104, and the air comb 211 is positioned inside the oil pipe 1, with multiple air combs 211 arranged parallel and spaced apart. The distance between the air comb 211 and the top of the oil pipe 1 gradually decreases along the direction from the inlet end 103 to the outlet end 104, that is, the air comb 211 is inclined. Figure 2 As shown, when the fuel flows from left to right, most of the fuel can enter the fuel delivery chamber 101 through the gap between adjacent comb rods 211. A small portion of the fuel, as well as air bubbles and impurities in the fuel, will flow into the return chamber 102 under the guidance of the comb rods 211, and then flow back into the fuel tank along the return chamber 102.

[0057] The process of installing the separator 2 inside the oil pipeline 1 remains relatively unchanged, but it is prone to the problem of unequal cross-sections of the two oil delivery chambers 101. To solve this problem, the oil pipeline 1 can be configured to include two side walls 11 and a top wall 12, both of which have arc-shaped cross-sections, and the two side walls 11 and the top wall 12 enclose a circular tubular structure; the separator 2 can be configured to include two side frames 21 and a top frame 22, with the side frames 21 fixedly mounted on the side walls 11 and enclosing them to form the oil delivery chamber 101. The two side frames 21 correspond one-to-one with the two side walls 11, and multiple air combs 211 are fixedly mounted on the side frames 21. The top frame 22 is fixedly mounted on the top wall 12 and encloses it to form the return chamber 102; Figure 6As shown, the oil pipeline 1 and the separator 2 are composed of three independent tubular structures with a D-shaped cross-section. The three independent tubular structures are of two types. After processing them separately, they are spliced ​​together in a triangular shape to complete the overall processing of the oil pipeline 1 and the separator 2.

[0058] To improve the strength and ease of splicing independent tubular structures, it is possible to... Figure 4 and Figure 8 As shown, multiple fixing slots 201 are provided on both side frames 21. A fixing pipe 212 is fixedly installed on one of the side frames 21, allowing the two side frames 21 to be connected to the fixing slots 201 through the fixing pipes 212. Then, multiple fixing pipes 212 are fixedly installed on the bottom side of the top frame 22, allowing the top frame 22 to be connected to the two side frames 21 through the fixing pipes 212 and the fixing slots 201. Figure 4 , Figure 10 and Figure 11 As shown, a slot 202 can also be opened on each side frame 21, and two hooks 221 can be fixed on the bottom side of the top frame 22 so that the hooks 221 and the slots 202 are engaged and correspond one-to-one.

[0059] Regarding the arrangement of the latch 221, it is preferable that the latch 221 includes a support portion 2211 and a holding portion 2212, wherein the support portion 2211 is fixedly mounted on the top frame 22 and passes through the latch groove 202, and the holding portion 2212 is fixedly mounted on the side of one support portion 2211 near the other support portion 2211 and engages with the side frame 21, and a positioning groove 203 is formed on the bottom side of the holding portion 2212; Figure 12 As shown, the two supporting parts 2212 are arranged facing each other. When the three independent tubular structures need to be disassembled and maintained, the supporting parts 2212 and the side frame 21 can be separated by pushing the ball-head rod-shaped structure into the positioning groove 203, thereby improving the maintenance efficiency of this fuel consumption analysis device. At the same time, in order to improve the splicing efficiency of the three independent tubular structures, the axial lengths of the multiple fixed tubes 212 can be different. For example, when splicing two side frames 21, the longest fixed tube 212 on one side frame 21 can be inserted into the corresponding slot 202 of the other side frame 21. Then, the two side frames 21 are rotated so that the remaining fixed tubes 212 on this side frame 21 are inserted into the corresponding slots 202, without having to ensure that multiple fixed tubes 212 are aligned with multiple slots 202 at the same time.

[0060] Different fuel temperatures can also affect the accuracy of fuel consumption detection. Therefore, heating channels 204 can be provided in both the side frame 21 and the comb rod 211. By circulating the heat exchange medium into the heating channels 204, the fuel temperature can be kept uniform. To facilitate the circulation of the heat exchange medium, it is preferable to connect the heating channels 204 in the corresponding side frame 21 and the comb rod 211, and connect the heating channels 204 in the two side frames 21 through the fixed pipe 212.

[0061] Multiple ultrasonic detectors 3 are used to detect the flow rate of fuel in the two fuel delivery chambers 101 respectively. Since other factors may exist in the fuel that affect the accuracy of fuel consumption detection, this device divides the fuel into two streams with equal cross-sections, allowing for separate detection and comparison of the fuel flow rates in the two fuel delivery chambers 101, thereby improving the accuracy of fuel consumption detection. Specifically, the multiple ultrasonic detectors 3 are preferably fixedly mounted on the side wall 11 or the side frame 21, such as... Figure 7 As shown, an ultrasonic detector 3 is installed on both sides of each oil delivery chamber 101. The straight line of the two ultrasonic detectors 3 located on both sides of the same oil delivery chamber 101 intersects the center line of the oil delivery chamber 101 but is not perpendicular. The detection principle is as follows: the ultrasonic detector 3 on one side of the oil delivery chamber 101 emits ultrasonic waves. After passing through the oil delivery chamber 101, the ultrasonic waves are received by the ultrasonic detector 3 on the other side of the oil delivery chamber 101. The ultrasonic detector 3 on the other side of the oil delivery chamber 101 then emits ultrasonic waves. After passing through the oil delivery chamber 101, the ultrasonic waves are received by the ultrasonic detector 3 on one side of the oil delivery chamber 101. One ultrasonic wave is affected by the downstream flow of fuel, and the other is affected by the upstream flow of fuel, which will produce a speed difference. Therefore, the downstream flow rate can be inferred based on the installation angle.

[0062] The outer casing 4 is used to carry the oil pipeline 1 and is installed on the vehicle body. An opening 401 is provided on one side of the outer casing 4. A cover 44 is detachably fixed on the outer casing 4. The cover 44 selectively blocks the opening 401 in order to protect and maintain the oil pipeline 1 inside the outer casing 4.

[0063] To facilitate the connection of the oil supply pipe 1 to the oil tank and the engine, it is preferable to fix an oil inlet pipe 41 and an oil outlet pipe 42, which are connected to the interior of the outer casing 4, on the outer casing 4. A limiting groove 402 is formed at the end of the oil outlet pipe 42 near the oil inlet pipe 41. The outer diameter of the oil supply pipe 1 is equal to the inner diameter of the oil inlet pipe 41 and the inner diameter of the limiting groove 402, and larger than the inner diameter of the oil outlet pipe 42. Figure 1 and Figure 13 As shown, the oil pipe 1 can be installed inside the housing 4 by inserting the oil pipe 1 into the oil pipe 41, and the oil pipe 1 can be fixed by the snap-fit ​​between the oil pipe 1 and the limiting groove 402.

[0064] To optimize the installation position of the reflux chamber 102, such as Figure 9 and Figure 10 As shown, preferably, a blocking plate 222 is fixedly installed between the top frame 22 and the top wall 12, so that the blocking plate 222 seals the end of the return cavity 102 near the oil outlet 104. A return hole 105 is opened on the top wall 12, and an abutment plate 121 is fixedly installed in the return hole 105. Figure 13 As shown, a return pipe 43 is slidably disposed on the outer casing 4, so that the return pipe 43 passes through the outer casing 4 and is connected to the return cavity 102 through the return hole 105. A nut 431 is connected to the outside of the return pipe 43 by a threaded connection, so that the nut 431 abuts against the inner wall of the outer casing 4, so that the return pipe 43 abuts against the abutment plate 121. When the nut 431 is rotated, the return pipe 43 can abut against the abutment plate 121, so that the return pipe 43 and the return hole 105 are sealed and connected. When the nut 431 is rotated in the opposite direction, the return pipe 43 can be separated from the return hole 105, thereby facilitating the disassembly and maintenance of the oil pipeline 1.

[0065] A fuel consumption detection method of the present invention includes the following steps:

[0066] S1, use pipelines to connect the oil inlet pipe 41 and the return pipe 43 to the inside of the oil tank, connect the oil outlet pipe 42 to the engine, connect the ultrasonic detector 3 to the ultrasonic flow rate detection device, and supply heat exchange medium into the heating channel 204.

[0067] S2, start the fuel pump, allowing fuel to flow into the fuel supply pipe 1, where it is divided into three fuel streams by the separator 2. These three fuel streams are located in the two fuel supply chambers 101 and the return chamber 102, respectively. Figure 2 As shown, due to the guiding and blocking effect of the comb rod 211, air bubbles and impurities can flow into the return chamber 102 and return to the fuel tank, instead of flowing into the fuel delivery chamber 101, thereby keeping the fuel in the two fuel delivery chambers 101 clean.

[0068] S3, the flow velocity of the fuel flow in the two oil delivery chambers 101 is detected by ultrasonic detector 3 and recorded as X and Y respectively;

[0069] S4. If X = Y, it indicates that there are no interfering factors in the fuel consumption detection. The fuel consumption can be calculated based on the flow velocity X and the vehicle's mileage. That is, the product of the flow velocity and the cross-section of the fuel delivery chamber 101 is divided by the vehicle's mileage. If X ≠ Y, it indicates that there are still interfering factors in the fuel consumption detection. In this case, it is necessary to calculate the ultrasonic attenuation of the ultrasonic detectors 3 on both sides of the two fuel delivery chambers 101, denoted as M and N respectively. M and X correspond to the first fuel delivery chamber 101, and N and Y correspond to the second fuel delivery chamber 101. If M > N, it indicates that the amount of fuel consumption detection interference in the fuel in the first fuel delivery chamber 101 is greater than the amount of fuel consumption detection interference in the fuel in the first fuel delivery chamber 101. In this case, the fuel consumption can be calculated based on the flow velocity Y, which has a relatively small amount of interference, and the vehicle's mileage. If M ≤ N, similarly, the fuel consumption can be calculated based on the flow velocity X and the vehicle's mileage.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fuel consumption analysis device, characterized in that: It includes an oil pipeline (1), a separator (2), and multiple ultrasonic detectors (3), among which, The separator (2) is fixedly installed inside the oil pipe (1). The separator (2) divides the inner cavity of the oil pipe (1) into two oil delivery chambers (101) and one return chamber (102). The two oil delivery chambers (101) are the same size and shape and are symmetrically arranged. The return chamber (102) is located at the top of the two oil delivery chambers (101). One end of the oil delivery chamber (101) and both ends of the return chamber (102) are connected to the oil tank. The other end of the oil delivery chamber (101) is connected to the engine. Multiple ultrasonic detectors (3) are used to detect the flow rate of fuel in the two oil delivery chambers (101) respectively; The two ends of the oil pipeline (1) are the inlet end (103) and the outlet end (104), respectively, and the separator (2) is located inside the oil pipeline (1) near the outlet end (104); The separator (2) is fixedly provided with a plurality of air combs (211) at the end away from the oil outlet (104). The air combs (211) are located inside the oil pipe (1). The plurality of air combs (211) are arranged in parallel and at intervals. The distance between the air combs (211) and the top of the oil pipe (1) gradually decreases along the direction from the oil inlet (103) to the oil outlet (104). The oil pipeline (1) includes two side walls (11) and one top wall (12). The cross-sections of the side walls (11) and the top wall (12) are both arc-shaped, and the two side walls (11) and the top wall (12) enclose a circular tubular structure. The separator (2) includes two side frames (21) and one top frame (22). The side frames (21) are fixedly mounted on the side walls (11) and enclose them to form the oil delivery chamber (101). The two side frames (21) correspond one-to-one with the two side walls (11). The multiple air combs (211) Fixedly installed on the side frame (21); the top frame (22) is fixedly installed on the top wall (12) and surrounds it to form the return cavity (102); a plurality of ultrasonic detectors (3) are fixedly installed on the side wall (11) or the side frame (21), and each of the oil delivery cavities (101) is provided with one ultrasonic detector (3) on each side. The straight line of the two ultrasonic detectors (3) located on both sides of the same oil delivery cavity (101) intersects the center line of the oil delivery cavity (101) but is not perpendicular to it; It also includes a housing (4), one side of which has an opening (401), and a cover (44) is detachably fixed to the housing (4), which selectively blocks the opening (401); an oil inlet pipe (41) and an oil outlet pipe (42) connected to the inside of the housing (4) are fixedly provided on the housing (4), and a limiting groove (402) is opened at one end of the oil outlet pipe (42) near the oil inlet pipe (41); the outer diameter of the oil delivery pipe (1) is equal to the inner diameter of the oil inlet pipe (41) and the inner diameter of the limiting groove (402), and is larger than the inner diameter of the oil outlet pipe (42); a blocking plate (222) is fixedly provided between the top frame (22) and the top wall (12). The blocking plate (222) seals the end of the return cavity (102) near the oil outlet (104). A return hole (105) is provided on the top wall (12). An abutment plate (121) is fixedly installed in the return hole (105). A return pipe (43) is slidably installed on the outer shell (4). The return pipe (43) passes through the outer shell (4) and is connected to the return cavity (102) through the return hole (105). A nut (431) is connected to the outside of the return pipe (43) by a threaded connection. The nut (431) abuts against the inner wall of the outer shell (4) so ​​that the return pipe (43) abuts against the abutment plate (121).

2. The fuel consumption analysis device as described in claim 1, characterized in that: Multiple fixing slots (201) are provided on both side frames (21), and a fixing tube (212) is fixedly installed on one of the side frames (21). The two side frames (21) are connected to the fixing slots (201) by the fixing tube (212). The bottom side of the top frame (22) is fixedly provided with multiple fixing tubes (212), and the top frame (22) and the two side frames (21) are connected to the fixing groove (201) by the fixing tubes (212).

3. The fuel consumption analysis device as described in claim 2, characterized in that: Each of the side frames (21) has a slot (202); The bottom side of the top frame (22) is provided with two hooks (221) that are opposite each other. The hooks (221) are engaged with the slots (202) and correspond one-to-one.

4. The fuel consumption analysis device as described in claim 3, characterized in that: The hook (221) includes a support portion (2211) and a holding portion (2212), wherein, The support (2211) is fixedly mounted on the top frame (22) and passes through the slot (202). The abutment (2212) is fixedly disposed on one side of the support (2211) near the other support (2211) and is engaged with the side frame (21). The bottom side of the abutment (2212) is provided with a positioning groove (203).

5. The fuel consumption analysis device as described in claim 4, characterized in that: Heating channels (204) are provided in both the side frame (21) and the comb rod (211). The heating channels (204) in the corresponding side frame (21) and the comb rod (211) are connected. The heating channels (204) in the two side frames (21) are connected through the fixed pipe (212).

6. The fuel consumption analysis device as described in claim 5, characterized in that: The axial lengths of the multiple fixed tubes (212) are not the same.

7. A fuel consumption detection method, employing the fuel consumption analysis device as described in claim 6, characterized in that, Includes the following steps: S1, use pipelines to connect the oil inlet pipe (41) and the return pipe (43) to the inside of the oil tank, connect the oil outlet pipe (42) to the engine, connect the ultrasonic detector (3) to the ultrasonic flow rate detection device, and supply heat exchange medium into the heating channel (204). S2, start the oil pump to allow fuel to flow into the oil supply pipe (1) and be divided into three fuel streams by the separator (2). The three fuel streams are located in the two oil supply chambers (101) and the return chamber (102) respectively. S3, the flow velocity of the fuel flow in the two oil delivery chambers (101) is detected by the ultrasonic detector (3) and recorded as X and Y respectively; S4, if X=Y, then calculate the vehicle fuel consumption based on the flow velocity X and the vehicle mileage. If X≠Y, then calculate the ultrasonic attenuation of the ultrasonic detectors (3) on both sides of the two oil delivery chambers (101), denoted as M and N respectively. If M>N, then calculate the vehicle fuel consumption based on the flow velocity Y and the vehicle mileage. If M≤N, then calculate the vehicle fuel consumption based on the flow velocity X and the vehicle mileage.

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