Oil inlet and return pressure adjusting device for oil consumption meter

Abstract

The utility model discloses an oil inlet and return pressure adjusting device for an oil consumption meter, which is applied to testing of an engine, and an oil inlet and an oil return port of the engine are respectively connected with an engine oil inlet pipe and an engine oil return pipe. The two ends of the oil consumption meter are connected to an engine oil inlet pipe and an engine oil return pipe respectively. The end of the engine oil inlet pipe is connected with an oil inlet pump and an oil inlet pressure regulating valve which are arranged in parallel. The end part of the engine oil return pipe is connected with an oil return pump and an oil return pressure regulating valve which are arranged in parallel; two back pressure valves are sequentially connected between the engine oil inlet pipe and the engine oil return pipe in series. The device is suitable for tests of gasoline engines and diesel engines, suction is applied to the oil return pipeline through the oil return pump, so that fuel oil can return to the oil consumption meter more quickly, the pressure of an outlet of the oil return pipeline of the engine is reduced, the oil content of the oil return meter is effectively controlled through the arranged back pressure valve, and the oil return pressure can be better controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of engine testing, and specifically relates to an inlet and return oil pressure regulating device for an oil consumption meter. Background Art

[0002] During engine tests, whether it is a gasoline engine or a diesel engine, it is necessary to simulate the actual operating state of the engine on the vehicle.

[0003] Currently, the traditional oil consumption meter uses a separate fuel supply pressure regulating device that can be used for gasoline engines. This fuel supply pressure regulating device can only control the inlet oil pressure and does not support the function of controlling the return oil pressure, so it does not support being used on a diesel engine test bench.

[0004] Therefore, we propose an inlet and return oil pressure regulating device for an oil consumption meter to overcome the above problems. Summary of the Utility Model

[0005] Aiming at the above-mentioned deficiencies existing in the prior art, the purpose of the utility model is to provide an inlet and return oil pressure regulating device for an oil consumption meter to solve the above technical problems.

[0006] The technical solution adopted by the utility model to achieve the above purpose is: an inlet and return oil pressure regulating device for an oil consumption meter, which is applied to the test of an engine. The inlet and return ports of the engine are respectively connected with an engine inlet oil pipe and an engine return oil pipe; both ends of the oil consumption meter are respectively connected to the engine inlet oil pipe and the engine return oil pipe. Its characteristics are: the end of the engine inlet oil pipe is connected with an inlet oil pump and an inlet oil pressure regulating valve arranged in parallel; the end of the engine return oil pipe is connected with a return oil pump and a return oil pressure regulating valve arranged in parallel; two back pressure valves are successively connected in series between the engine inlet oil pipe and the engine return oil pipe.

[0007] In order to further improve the use convenience of the inlet and return oil pressure regulating device for an oil consumption meter, the solution adopted by the utility model is: the end of the engine inlet oil pipe is also connected with a stabilizing tank, and the pressure stabilizing tank is used to maintain the pressure of the pipeline. The stabilizing tank is connected in parallel with the inlet oil pump and the inlet oil pressure regulating valve.

[0008] In order to further improve the use convenience of the inlet and return oil pressure regulating device for an oil consumption meter, the solution adopted by the utility model is: the two back pressure valves include a first back pressure valve and a second back pressure valve.

[0009] In order to further improve the use convenience of the inlet and return oil pressure regulating device for an oil consumption meter, the solution adopted by the utility model is: the set pressure of the first back pressure valve is lower than the set pressure of the second back pressure valve.

[0010] In order to further improve the usability of the inlet and return oil pressure regulating device for the fuel consumption meter, the solution adopted by the present utility model is as follows: The fuel inlet of the engine is connected to the engine inlet pipe through a first pressure hose, and the fuel return port of the engine is connected to the engine return pipe through a first pressure hose.

[0011] In order to further improve the usability of the inlet and return oil pressure regulating device for the fuel consumption meter, the solution adopted by the present utility model is as follows: A metal seal with an O-ring for ensuring the tightness of the pipeline is respectively connected between the first pressure hose and the engine inlet pipe and the engine return pipe.

[0012] In order to further improve the usability of the inlet and return oil pressure regulating device for the fuel consumption meter, the solution adopted by the present utility model is as follows: Both ends of the fuel consumption meter are respectively connected to the engine inlet pipe and the engine return pipe through second pressure hoses.

[0013] In order to further improve the usability of the inlet and return oil pressure regulating device for the fuel consumption meter, the solution adopted by the present utility model is as follows: A metal seal with an O-ring for ensuring the tightness of the pipeline is respectively connected between the second pressure hose and the engine inlet pipe and the engine return pipe.

[0014] The beneficial effects of the present utility model: This kind of inlet and return oil pressure regulating device for the fuel consumption meter applies suction in the return oil pipeline through a return oil pump, enabling the fuel to return to the fuel consumption meter faster, reducing the pressure at the outlet of the engine return oil pipeline, and preventing problems such as low pressure in the return oil pipeline and burnout of the oil pump caused by excessive power of the oil pump and too strong oil pumping ability by controlling the pressure regulating valve. Additionally, by setting the back pressure valve, the oil content in the return fuel consumption meter can be effectively controlled to better control the return oil pressure, which is applicable to diesel engine tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the oil pressure inlet and return part of the present utility model.

[0017] In the figure: 1, engine inlet pipe; 2, pressure stabilizing tank; 3, inlet oil pump; 4, inlet oil pressure regulating valve; 5, first back pressure valve; 6, second back pressure valve; 7, return oil pump; 8, return oil pressure regulating valve; 9, return pipe; 10, engine; 11, first pressure hose; 12, fuel consumption meter; 13, second pressure hose. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 to 2 , a fuel inlet and return oil pressure regulating device for an oil consumption meter of the present invention is applied to the test of an engine 10 and includes an engine fuel inlet pipe 1 and an engine fuel return pipe 9. The fuel inlet and return oil ports of the engine 10 are respectively connected to the engine fuel inlet pipe 1 and the engine fuel return pipe 9; both ends of the oil consumption meter 12 are respectively connected to the engine fuel inlet pipe 1 and the engine fuel return pipe 9.

[0020] In the present invention: the end of the engine fuel inlet pipe 1 is connected with a parallel arrangement of an inlet oil pump 3 and an inlet oil pressure regulating valve 4, and the inlet oil pressure regulating valve 4 is used to regulate the inlet oil pressure of the oil path at the rear end of the inlet oil pump 3; the end of the engine fuel return pipe 9 is connected with a parallel arrangement of a return oil pump 7 and a return oil pressure regulating valve 8, and the return oil pressure regulating valve 8 is used to regulate the return oil pressure of the oil path at the rear end of the return oil pump 7. Both the inlet oil pump 3 and the return oil pump 7 are replaceable products. According to engines 10 with different powers, the return oil pump 7 with different powers can be replaced so that the inlet oil pressure regulating valve 4, the return oil pressure regulating valve 8 and the back pressure valve can better regulate the control accuracy, thereby realizing the accuracy of controlling the fuel inlet and return oil pressures; two back pressure valves are successively connected in series between the engine fuel inlet pipe 1 and the engine fuel return pipe 9. First, the return oil of the engine 10 (i.e., when the engine 10 is a diesel engine) is led out by the engine fuel return pipe 9, and then a 12V return oil pump 7 is connected to the engine fuel return pipe 9 (the power of the return oil pump 7 is adjusted according to the actual situation of the engine 10 to further control the accuracy of the fuel inlet and return oil pressures). A pipeline is connected in parallel at both ends of the return oil pump 7, and a return oil pressure regulating valve 8 is installed on this section of the pipeline. Two back pressure valves are installed in series at the parallel outlet of the return oil pressure regulating valve 8. Then, through a tee structure, the engine fuel return pipe 9, the fuel supply pressure regulating device of the oil consumption meter 12 and the return oil pipe orifice of the oil consumption meter 12 can be connected to realize the use for diesel engine tests; if it is necessary to be used for the engine 10 (i.e., when the engine 10 is a gasoline engine), the return oil pressure regulating valve 8 is closed to restore the original function. After the return oil pressure regulating valve 8 is closed, the inlet and outlet of the engine fuel return pipe 9 need to be wrapped with a film to prevent pipeline pollution, which is beneficial for next use.

[0021] Furthermore, the fuel inlet of the engine 10 is connected to the engine fuel inlet pipe 1 through the first pressure hose 11, and the fuel return port of the engine 10 is connected to the engine fuel return pipe 9 through the first pressure hose 11. The first pressure hose 11 has a certain anti-deformation ability to prevent the engine fuel inlet pipe 1 and the engine fuel return pipe 9 from being flattened by the fuel inlet pump 3 or the fuel return pump 7. Wherein, a metal seal with an O-ring is respectively connected between the first pressure hose 11 and the engine fuel inlet pipe 1 and the engine fuel return pipe 9, and the metal seal with an O-ring is used to ensure the sealing performance of the pipeline. The sealed connection through the first pressure hose 11 can ensure the sealing performance of the overall pipeline, prevent oil leakage; it can also avoid the excessive suction force of the fuel inlet pump 3 or the fuel return pump 7 that may cause air inhalation, affecting the fuel consumption calculation of the fuel consumption meter 12, and can prevent the complicated bending of the pipeline from causing cumbersome installation.

[0022] Furthermore, both ends of the fuel consumption meter 12 are respectively connected to the engine fuel inlet pipe 1 and the engine fuel return pipe 9 through the second pressure hose 13. The second pressure hose 13 has a certain anti-deformation ability to prevent the engine fuel inlet pipe 1 and the engine fuel return pipe 9 from being flattened by the fuel inlet pump 3 or the fuel return pump 7. Wherein, a metal seal with an O-ring is respectively connected between the second pressure hose 13 and the engine fuel inlet pipe 1 and the engine fuel return pipe 9, and the metal seal with an O-ring is used to ensure the sealing performance of the pipeline. The sealed connection through the second pressure hose 13 can ensure the sealing performance of the overall pipeline, prevent oil leakage, avoid the excessive suction force of the fuel inlet pump 3 or the fuel return pump 7 that may cause air inhalation, affecting the fuel consumption calculation of the fuel consumption meter 12, and can prevent the complicated bending of the pipeline from causing cumbersome installation.

[0023] Furthermore, a pressure stabilizing tank 2 is also connected in parallel to the second end of the engine fuel inlet pipe 1, and the pressure stabilizing tank 2 is used to maintain the pressure stability of the pipeline. Specifically, the principle of the pressure stabilizing tank 2 is to use air pressure to maintain the stable pressure of the liquid. Through devices such as pressure sensors, regulating valves, and pressure controllers, the gas pressure in the system is monitored and adjusted, so as to maintain the pressure stability of the pipeline. Furthermore, the influence of pressure fluctuations is reduced, so that the calculated value of the fuel consumption meter 12 is closer to the true value, and the test error of the engine 10 is reduced; the pressure stabilizing tank 2 is connected in parallel with the fuel inlet pump 3 and the fuel inlet pressure regulating valve 4.

[0024] Furthermore, the back pressure valve includes a first back pressure valve 5 and a second back pressure valve 6. Two or more back pressure valves can be connected in series in the pipeline to achieve more effective pressure control; the required opening pressure of a single back pressure valve can be reduced, and the service life of the back pressure valve can be extended.

[0025] Specifically, the set pressure of the first back-pressure valve 5 is lower than that of the second back-pressure valve 6, which can prevent the first back-pressure valve 5 from failing to close, enabling more precise pressure control and being applicable to occasions requiring higher control precision.

[0026] Through self-modification, the utility model is not only applicable to engines (i.e., gasoline engines), but also enables the inlet and return oil pressure regulating structure to satisfy both the fuel supply pressure control and the return oil pressure control of engines (i.e., diesel engines).

[0027] All standard parts used in the utility model can be purchased from the market. Special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art. In addition, the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0028] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments understandable to those skilled in the art.

Claims

1. An inlet and return oil pressure regulating device for an oil consumption meter, which is applied to the test of an engine (10). The inlet and return oil ports of the engine (10) are respectively connected with an engine inlet oil pipe (1) and an engine return oil pipe (9); both ends of the oil consumption meter (12) are respectively connected to the engine inlet oil pipe (1) and the engine return oil pipe (9), and it is characterized in that: The end of the engine inlet oil pipe (1) is connected with an inlet oil pump (3) and an inlet oil pressure regulating valve (4) arranged in parallel; The end of the engine return oil pipe (9) is connected with a return oil pump (7) and a return oil pressure regulating valve (8) arranged in parallel; Two back pressure valves are successively connected in series between the engine inlet oil pipe (1) and the engine return oil pipe (9).

2. The oil inlet and return pressure regulating device for a fuel consumption meter according to claim 1, wherein: The end of the engine inlet oil pipe (1) is further connected with a stabilizing tank (2) for maintaining the stability of the pipeline, and the stabilizing tank (2) is connected in parallel with the inlet oil pump (3) and the inlet oil pressure regulating valve (4).

3. The oil inlet and return pressure regulating device for an oil consumption meter according to claim 1, characterized in that: The two back pressure valves include a first back pressure valve (5) and a second back pressure valve (6).

4. The oil inlet and return pressure regulating device for an oil consumption meter according to claim 3, characterized in that: The set pressure of the first back pressure valve (5) is lower than the set pressure of the second back pressure valve (6).

5. A fuel consumption meter inlet and return oil pressure regulating device according to claim 1, characterized in that: The inlet oil port of the engine (10) is connected with the engine inlet oil pipe (1) through a first pressure hose (11), and the return oil port of the engine (10) is connected with the engine return oil pipe (9) through a first pressure hose (11).

6. The oil inlet and return pressure regulating device for an oil consumption meter according to claim 5, characterized in that: A metal seal with an O-ring for ensuring the sealing of the pipeline is respectively connected between the first pressure hose (11) and the engine inlet oil pipe (1) and the engine return oil pipe (9).

7. The oil inlet and return pressure regulating device for a fuel consumption meter according to claim 1, characterized in that: Both ends of the oil consumption meter (12) are respectively connected to the engine inlet oil pipe (1) and the engine return oil pipe (9) through a second pressure hose (13).

8. The oil inlet and return pressure regulating device for fuel consumption meter according to claim 7, characterized in that: A metal seal with an O-ring for ensuring the sealing of the pipeline is respectively connected between the second pressure hose (13) and the engine inlet oil pipe (1) and the engine return oil pipe (9).

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